Relevant bibliographies by topics / Laser rangefinders and their structure / Journal articles

To see the other types of publications on this topic, follow the link: Laser rangefinders and their structure.

Journal articles on the topic 'Laser rangefinders and their structure'

Author: Grafiati

Published: 7 June 2025

Last updated: 17 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Laser rangefinders and their structure.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

Wei, Li, and Chen Guang Zhao. "Study on Wireless Sensor Network Based on Laser Rangefinder." Advanced Materials Research 403-408 (November 2011): 2776–79. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.2776.

Full text

Abstract:

A system of wireless sensor network(WSN) based on laser rangefinder is studied, which adopts low power consumption ZigBee chip and SimpliciTI network protocol. 8 laser rangefinders are used to collecy the distance of the test points. The collection data is sent to upper computer by wireless data transmission module. It is rapid and real time to monitor the test point. The system can be installed in complex test environment to perform the monitor of all kinds of architecture structure. It dispenses with long time power supply and the user interface is friendly and has abundance function.

APA, Harvard, Vancouver, ISO, and other styles

Sadchenko, A. V., O. A. Kushnirenko, and E. K. Koshelev. "Anti-interference pulsed laser ranging system." Технология и конструирование в электронной аппаратуре, no. 1-2 (2020): 8–14. http://dx.doi.org/10.15222/tkea2020.1-2.08.

Full text

Abstract:

Pulsed laser rangefinders prove to be cost-effective and practical devices when used at distances of several tens of kilometers due to their compactness, portability and energy efficiency. However, the measurement accuracy is significantly reduced by the presence of pulsed interference affecting the input of the optical receiver both during the sensing period and when the reflected signal is being received. Using the algorithms with the accumulation and subsequent processing of the results of several successive measurements reduces the speed of decision-making and does not guarantee the convergence of the results to the real value of the distance. The paper proposes a structural diagram of a laser rangefinder with the ability to detect pulsed interference in the range interval and correct errors that occur in the structure of the signal reflected from the target. The basis of the rangefinder circuit is a logical consistent filter, the structure of which contains multipliers (multiplication operations). The following requirements were formulated for the structure of the probe signal: — the first element should always be set to +1 to synchronize the receiver decider; — the weight of the coding sequence is equal to half its length; — the length of the coding sequence is even. Based on the requirements for coding sequences, the optimal structures of binary probing signals of length 8 were found, providing the best corrective ability. Comparison of the correlation properties of the found sequences and the sequences that are constructed using the Walsh functions showed the advantage of the optimal sequences by the criterion of the minimum level of the ACF side lobes. The simulation of the rangefinder under pulsed noise conditions has shown that the logical filter is advisable to use for those cases when the duration of the obstacle does not exceed 1/3 of the duration of the probing signal.

APA, Harvard, Vancouver, ISO, and other styles

Savvova, Oksana, Oleh Tur, Hennadii Voronov, Oleksii Fesenko, Olena Babich, and Yuliia Smyrnova. "PROSPECTIVE LITHIUM ALUMINOSILICATE GLASS-CERAMIC MATERIALS FOR PULSE RANGEFINDERS." Bulletin of the National Technical University "KhPI". Series: Chemistry, Chemical Technology and Ecology, no. 2(10) (April 27, 2024): 61–67. http://dx.doi.org/10.20998/2079-0821.2023.02.02.

Full text

Abstract:

The relevance of creating multi-functional nanosecond pulsed laser devices with a generation wavelength that lies in the conditionally eye-safe region of the spectrum of 1.5÷1.6 μm has been established. The prospects of using the mode of passive Q-switching when receiving powerful nanosecond laser pulses with a radiation divergence close to the diffraction one have been determined. Materials for shutters that function in the mode of passive Q-switching were analyzed: solid-state nonlinear optical materials based on single crystals of yttrium-aluminum garnet doped with cations of neodymium, chromium, vanadium and other Nd- or Yb-doped crystals in the wavelength range of 0.8–1.2 μm. The promising use of oxide single crystals activated by Co2+ ions in four-coordinated oxygen positions for MgAl2O4, LiGa5O8, LaMgAl11O19 has been confirmed. The feasibility of developing transparent glass-ceramics based on aluminomagnesium and lithium gallium spinel for pulsed ranging was determined, taking into account its commercial availability, the simplicity of the production technology, as well as the homogeneity of the distribution of the activator in the volume. The feasibility of creating a new type of nonlinear optical materials based on nanostructured heat-resistant lithium aluminosilicate glass ceramics with spinel nanocrystals activated by Co2+ ions under low-temperature heat treatment conditions, has been determined. The purpose and tasks of the work are formulated, which consist in justifying the choice of the system and compositions of glasses for obtaining glass-ceramic materials as a passive laser shutter for powerful lasers that operate at a wavelength of 1.54 μm and are characterized by high heat resistance. The choice of the lithium aluminosilicate system R2O – RO – RO2 – P2O5 – R2O3 – SiO2 based on phase-forming SiO2, Al2O3, Li2O, modifying K2O is substantiated; RO – MgO, ZnO, CaO, SrO, BaO components and a complex crystallization catalyst of P2O5, CeO2, TiO2, SnO2, ZrO2 and ZnO. The structural criteria for the glass matrix were formulated. Compositions of model glasses were designed taking into account the calculated parameters fSi > 0.22, Kсr ≥ 3.5, Ktr ≥ 2.1, and the probability of obtaining transparent glass-ceramic materials with a sitallized structure for pulse rangefinders was established on their basis.

APA, Harvard, Vancouver, ISO, and other styles

Xie, Yilin, Qing Wang, Lianbi Yao, Xiaolin Meng, and Yusong Yang. "Integrated Multi-Sensor Real Time Pile Positioning Model and Its Application for Sea Piling." Remote Sensing 12, no. 19 (2020): 3227. http://dx.doi.org/10.3390/rs12193227.

Full text

Abstract:

The traditional pile positioning method for offshore piling uses the intersection of lines of sight with two or three theodolites. This method has certain limits, including using post-mission pile positioning, being time-consuming and lacking position accuracy. A novel pile positioning model using four kinds of sensors (GNSS—Global Navigation Satellite System receivers, tiltmeters, laser rangefinders and calibrated CCD cameras) for sea piling was developed. Firstly, with Real Time Kinematics (RTK) GNSS and tiltmeter data, the piling ship’s position and attitude was achieved in real time, and then the coordinates of the pile center in the Ship Fixed Coordinate System (SFCS) were calculated by a laser rangefinder and a CCD camera data. Finally, using the coordinate transformation, the coordinates of the pile center construction were figured out and used to guide the pile movement to the right place in real time. Because of the poor RTK GNSS vertical accuracy (normally 2–3 cm) and complex piling ship structure, it is difficult to get the accurate penetration value per hammering, which is a very important parameter for structural engineers. A Scale Invariant Feature Transform (SIFT) algorithm was created to get the pixel difference between the two pile images captured before and after one hammering, respectively, which was then used to calculate the penetration. A case study on the piling ship named “YangShanHao” with the sensors and algorithms was also described and discussed in the paper. The results showed the high accuracy of the proposed position model and the pile sinking distance of the pixel, thanks to the SIFT algorithm.

APA, Harvard, Vancouver, ISO, and other styles

Pulpea, Gheorghe Bogdan. "Aspects Regarding The Development Of Pyrotechnic Obscurant Systems For Visible And Infrared Protection Of Military Vehicles." International conference KNOWLEDGE-BASED ORGANIZATION 21, no. 3 (2015): 731–36. http://dx.doi.org/10.1515/kbo-2015-0123.

Full text

Abstract:

Abstract During the last decades, the military combat vehicles and trucks were equipped with various weapon systems and laser rangefinders, optical devices and sighting equipment. The military vehicles were thus upgraded, so they become a more attractive target for enemy fire. Since ballistic armour cannot and will never completely protect vehicles against kinetic or explosive ammunitions, various pyrotechnic countermeasure systems such as smoke screening, were designed and implemented. Generating smoke screens or flares in the desired area (around the combat armoured vehicles) is a concern of many manufacturers of pyrotechnic protection systems, aiming to protect against detection in the visual (VIS) and infrared (IR) spectrum. The goal of this article is to present a brief state-of-the-art regarding the development of pyrotechnic smoke camouflage systems and flares used to ensure countermeasures in the visible and infrared electromagnetic spectrum. Types of pyrotechnic systems and structures for the protection of military vehicles will be described briefly.

APA, Harvard, Vancouver, ISO, and other styles

Celms, Armands, Miks Brinkmanis-Brimanis, and Melanija Jakstevica. "Application of Laser Scanning in Internal Surveying of Premises and Development of 3D Model of Building." Baltic Surveying 16 (December 22, 2022): 42–48. http://dx.doi.org/10.22616/j.balticsurveying.2022.16.005.

Full text

Abstract:

Nowadays, along with the classical and experienced surveying methods, modern technologies are rapidly developing and entering into the economy. Laser scanning has many benefits and uses. Application of this technology results in a point cloud from which it is possible to create three-dimensional models which can represent topographic properties, structure dimensions, and spatial relationships. The aim of the research is to investigate the application of three-dimensional laser scanning in the internal surveying of premises and in the development of the 3D model buildings. The task of the research is to apply the application of laser rangefinder and ultrasonic rangefinder method in the scanning of a building that is characterized by complex architecture, an interior garden, many protrusions, and a special layout of windows and doors. The use of the Stonex X300 laser scanner and Stonex M6 laser rangefinder has been described as well. To achieve the goals and objectives of the research, laser telemetry and ultrasonic telemetry method, method of three-dimensional modeling, as well as analysis of scientific literature, mathematical calculation methods, and analysis of documents and factual materials have been used. As the result of the investigation 3D model of a building consisting of 47 individual point clouds was developed. The main conclusion is that three-dimensional modeling as a computer graphics method for the three-dimensional representation of any object or surface can be used.

APA, Harvard, Vancouver, ISO, and other styles

Suchocki, Czesław. "Comparison of Time-of-Flight and Phase-Shift TLS Intensity Data for the Diagnostics Measurements of Buildings." Materials 13, no. 2 (2020): 353. http://dx.doi.org/10.3390/ma13020353.

Full text

Abstract:

In recent years, the terrestrial laser scanning system (TLS) has become one of the most popular remote and nondestructive testing (NDT) methods for diagnostic measurements of buildings and structures as well as for the assessment of architectural heritage. Apart from 3D coordinates, the power of a laser beam backscattered from the scanned object can be captured by TLS. The radiometric information of the point cloud, called “intensity”, can provide information about changes in the physio–chemical properties of the scanned surface. This intensity can be effectively used to detect defects in the surfaces of walls, such as cracks and cavities, moisture, biodeterioration (mosses and lichens) or weathered parts of the wall. Manufacturers of TLS mainly use two different principles for distance measurement, time-of-flight (TOF) and phase-shift (PS). The power of energy in both types of rangefinders might be absorbed or reflected in a slightly different way and provide more or less detailed radiometric point cloud information. The main aim of this investigation is to compare TOF and PS scanners in the context of using TLS intensity data for the diagnostics of buildings and other structures. The potential of TLS intensity data for detecting defects in building walls has been tested on multiple samples by two TOF (Riegl VZ400i, Leica ScanStation C10) and two PS (Z + F 5016 IMAGER, Faro Focus3D) scanners.

APA, Harvard, Vancouver, ISO, and other styles

Karam, Samer, Francesco Nex, Bhanu Teja Chidura, and Norman Kerle. "Microdrone-Based Indoor Mapping with Graph SLAM." Drones 6, no. 11 (2022): 352. http://dx.doi.org/10.3390/drones6110352.

Full text

Abstract:

Unmanned aerial vehicles offer a safe and fast approach to the production of three-dimensional spatial data on the surrounding space. In this article, we present a low-cost SLAM-based drone for creating exploration maps of building interiors. The focus is on emergency response mapping in inaccessible or potentially dangerous places. For this purpose, we used a quadcopter microdrone equipped with six laser rangefinders (1D scanners) and an optical sensor for mapping and positioning. The employed SLAM is designed to map indoor spaces with planar structures through graph optimization. It performs loop-closure detection and correction to recognize previously visited places, and to correct the accumulated drift over time. The proposed methodology was validated for several indoor environments. We investigated the performance of our drone against a multilayer LiDAR-carrying macrodrone, a vision-aided navigation helmet, and ground truth obtained with a terrestrial laser scanner. The experimental results indicate that our SLAM system is capable of creating quality exploration maps of small indoor spaces, and handling the loop-closure problem. The accumulated drift without loop closure was on average 1.1% (0.35 m) over a 31-m-long acquisition trajectory. Moreover, the comparison results demonstrated that our flying microdrone provided a comparable performance to the multilayer LiDAR-based macrodrone, given the low deviation between the point clouds built by both drones. Approximately 85 % of the cloud-to-cloud distances were less than 10 cm.

APA, Harvard, Vancouver, ISO, and other styles

Stateczny, Andrzej, Witold Kazimierski, Paweł Burdziakowski, Weronika Motyl, and Marta Wisniewska. "Shore Construction Detection by Automotive Radar for the Needs of Autonomous Surface Vehicle Navigation." ISPRS International Journal of Geo-Information 8, no. 2 (2019): 80. http://dx.doi.org/10.3390/ijgi8020080.

Full text

Abstract:

Autonomous surface vehicles (ASVs) are becoming more and more popular for performing hydrographic and navigational tasks. One of the key aspects of autonomous navigation is the need to avoid collisions with other objects, including shore structures. During a mission, an ASV should be able to automatically detect obstacles and perform suitable maneuvers. This situation also arises in near-coastal areas, where shore structures like berths or moored vessels can be encountered. On the other hand, detection of coastal structures may also be helpful for berthing operations. An ASV can be launched and moored automatically only if it can detect obstacles in its vicinity. One commonly used method for target detection by ASVs involves the use of laser rangefinders. The main disadvantage of this approach is that such systems perform poorly in conditions with bad visibility, such as in fog or heavy rain. Therefore, alternative methods need to be sought. An innovative approach to this task is presented in this paper, which describes the use of automotive three-dimensional radar on a floating platform. The goal of the study was to assess target detection possibilities based on a comparison with photogrammetric images obtained by an unmanned aerial vehicle (UAV). The scenarios considered focused on analyzing the possibility of detecting shore structures like berths, wooden jetties, and small houses, as well as natural objects like trees or other kinds of vegetation. The recording from the radar was integrated into a single complex radar image of shore targets. It was then compared with an orthophotomap prepared from AUV camera pictures, as well as with a map based on traditional land surveys. The possibility and accuracy of detection for various types of shore structure were statistically assessed. The results show good potential for the proposed approach—in general, objects can be detected using the radar—although there is a need for development of further signal processing algorithms.

APA, Harvard, Vancouver, ISO, and other styles

Wu, Qi, Yuanjin Yang, Yang Xu, Wenlong Wang, Chao Men, and Bingxiong Yang. "Design of single-laser remote methane gas measurement system with distance measurement based on time-division multiplexing technology." Journal of Physics: Conference Series 2770, no. 1 (2024): 012024. http://dx.doi.org/10.1088/1742-6596/2770/1/012024.

Full text

Abstract:

Abstract Limited to the principle of Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology, the existing open-path laser remote methane measurement system can only measure the integral concentration, and it needs to be matched with a laser rangefinder to complete the calculation of the average concentration, which increases the complexity of the system. To solve this problem, by driving the laser diode (LD) in time-division multiplexing mode, we complete the integral concentration of gas and distance measurement with the use of a single LD. We complete the design of the laser signal transceiver structure and finish the corresponding hardware circuit design, including the LD driving circuit, frequency generation, mixer circuit, and optoelectronic signal receiving circuit. The experiment shows the measurement error of the system is less than 2.5% while measuring the average concentration in the case of different concentrations and distances, and the system greatly reduces the system complexity while satisfying the performance requirements.

APA, Harvard, Vancouver, ISO, and other styles

Khodzitsky, Mikhal K., Vladimir V. Bassarab, Alexey A. Shakhmin, Valentin S. Sokolov, and Grigory I. Kropotov. "The Electromagnetic Shielding of Optoelectronic Devices by Mesh Structures." Applied Sciences 11, no. 21 (2021): 9841. http://dx.doi.org/10.3390/app11219841.

Full text

Abstract:

In this work, the shielding properties of mesh structures with various cell sizes on a K108 glass substrate are studied. The transmission spectra of the samples were obtained in a frequency range from 1 GHz to 1620 THz. A comparison of the experimental transmission spectra with those obtained using several theoretical models, and a numerical calculation were carried out. The most optimal theoretical model used to describe the shielding properties of a mesh structure in the frequency range upper-bounded by a resonant frequency is the one-mode calculation model. Anti-reflection coatings were used to increase the transmission coefficient of the structures in the visible and near-IR spectral ranges. These mesh structures can be used to shield optoelectronic devices such as a video camera or a laser rangefinder from microwaves.

APA, Harvard, Vancouver, ISO, and other styles

Zhu, Feihu, Ke Gong, and Yujing Huo. "A wide dynamic range laser rangefinder with cm-level resolution based on AGC amplifier structure." Infrared Physics & Technology 55, no. 2-3 (2012): 210–15. http://dx.doi.org/10.1016/j.infrared.2012.01.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Aryal, Suchana, Prashant Paudel, Sandesh Bolakhe, Deepak Mahatara, and Prakash Lamichane. "Evaluation of error and efficiency on tree height measurement using Abney’s level, Rangefinder and Vertex IV." Indian Journal of Forestry 45, no. 1 (2022): 1–8. http://dx.doi.org/10.54207/bsmps1000-2022-49p4f8.

Full text

Abstract:

Tree height is one of the basic variables which is used for estimation of growing stock, biomass, carbon stock and site quality. Measuring tree height is expensive, time-consuming, and error prone due to stand structure and efficiency of measuring instruments. Here, we try to explore the errors and efficiencies associated with Vertex, Abney’s level, and Laser Rangefinder for tree height measurement. Standing tree height was measured using all three instruments and the true height was determined with the careful measurement using linear tape after felling. In total 102 trees of Arunkhola community forest of Nawalpur districts were sampled. It was found that the Vertex (0.55 m) and Abney’s level (2.36 m) overestimated the tree height whereas, Rangefinder (-1.65 m) was underestimating. There was significant difference in errors for all the evaluated instruments at 95% confidence interval. However, there was no relation between true height and DBH with difference in measurement for all instruments. Average time required to measure individual trees was 4.15, 2.29 and 0.93 minutes for Abney’s level, Rangefinder, and Vertex respectively. It was estimated that efficiency for Vertex was 4.46 followed by Rangefinder with 22.69 by reflecting Vertex as the most precise and efficient instrument for measuring tree height.

APA, Harvard, Vancouver, ISO, and other styles

LEŚNIAK, Agnieszka, Izabela SKRZYPCZAK, and Leopold KRUSZKA. "SCAN-TO-BIM method and analysis of measurement accuracy on the example of a historic church." Inżynieria Bezpieczeństwa Obiektów Antropogenicznych, no. 4 (December 5, 2023): 91–104. http://dx.doi.org/10.37105/iboa.193.

Full text

Abstract:

Building information modeling (BIM) data for existing buildings based on scans and point clouds acquired from terrestrial laser scanning (TLS) is the basis of the Scan-to-BIM methodology and is becoming common practice. However, work on the accuracy of the resulting model is still desired. The article discusses the possibility of developing a BIM model of a historical building, based on data obtained by terrestrial laser scanning. The subject of the study was the church in Posada Rybotycka (Poland). The mapping reliability studies included PointCab and ReCap point cloud processing, 3D modeling of the object using Revit software, and analysis of the accuracy of distance measurements made by TLS with data obtained from measurements made with traditional methods: total station and laser rangefinder. Based on the conducted research, the possibility of using the BIM with TLS data in the process of reconstructing the geometry of a historic building was evaluated. The results of the study showed that the convergence of the 3D model geometry with the actual course of the structure depends on the development methodology, i.e. the accuracy of 3D data acquisition, the registration process, the filtering procedure, or the parametric structural modeling method used.

APA, Harvard, Vancouver, ISO, and other styles

Xia Li, Yin, and Yin Yuan Ma. "Research and design of a deformation monitoring system for the platform and canopy of a railway station." Journal of Physics: Conference Series 2459, no. 1 (2023): 012101. http://dx.doi.org/10.1088/1742-6596/2459/1/012101.

Full text

Abstract:

Abstract In this paper, the deformation of the platform and canopy of a high-speed railway station is studied, and an online monitoring system for platform canopy deformation is designed to solve the problem of online monitoring of platform canopy deformation. Due to the conventional one-dimensional measurement has been difficult to meet the needs of high-speed railway industrial production and daily life. Nowadays, laser radar and binocular cameras for three-dimensional data measurement have gradually emerged. At present, there is almost no three-dimensional data acquisition equipment with high measurement accuracy, low price, and a high degree of automation in the market. Given the lack of this equipment in the market, this paper presents a three-dimensional data acquisition system based on a laser rangefinder. By collecting, processing, and analyzing the data of the platform and canopy, the purpose of prediction can be achieved, and then the abnormal response, damage, and degradation of the structure can be found in time. The study shows that the monitoring system is helpful to detect deformation and give early warning, and effectively prevent the occurrence of hazards.

APA, Harvard, Vancouver, ISO, and other styles

Dodić, Nenad. "Laser rangefinders in air defense." Vojnotehnicki glasnik 47, no. 6 (1999): 43–53. http://dx.doi.org/10.5937/vojtehg9901043d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Ito, Kouhei, Akihisa Ohya, Naohiro Shimaji, and Takeshi Aoki. "Reduction of Distance Drift with Temperature in Uniaxial Laser Rangefinder by Using Multiecho Sensing." Journal of Robotics and Mechatronics 27, no. 1 (2015): 64–73. http://dx.doi.org/10.20965/jrm.2015.p0064.

Full text

Abstract:

<div class=""abs_img""><img src=""[disp_template_path]/JRM/abst-image/00270001/08.jpg"" width=""300"" />Uniaxial laser rangefinder</div> To expand the range of activities by unmanned aerial vehicles (UAVs), whose use at disaster sites and other dangerous locations has raised high expectations, UAVs must be capable of several functions, e.g., flight both indoor and outdoor environments. This requires making the airframe and major sensors as compact and light-weight as possible. To do so, we are developing uniaxial laser rangefinders to replace conventional scanning laser rangefinders. One developmental approach to uniaxial laser rangefinders and results regarding their validity are reported in this paper. Using a simulated model -- a modified scanning laser rangefinder -- we discuss the effectiveness of our approach. Specifically, this is to reduce the range drift due to heat, for which we propose using a multiecho to measure two echoes from a reference plate whose distance is known and that is placed outside of the sensor, and the target object, instead using the internal reference plate used in conventional two-dimensional scanning laser rangefinders. We also report the results of experiments verifying its validity. </span>

APA, Harvard, Vancouver, ISO, and other styles

Zhao, Sizeng, Fei Kang, Lina He, Junjie Li, Yiqing Si, and Yiping Xu. "Intelligent Structural Health Monitoring and Noncontact Measurement Method of Small Reservoir Dams Using UAV Photogrammetry and Anomaly Detection." Applied Sciences 14, no. 20 (2024): 9156. http://dx.doi.org/10.3390/app14209156.

Full text

Abstract:

This study proposes a UAV-based remote measurement method for accurately locating pedestrians and other small targets within small reservoir dams. To address the imprecise coordinate information in reservoir areas after prolonged operations, a transformation method for converting UAV coordinates into the local coordinate system without relying on preset parameters is introduced, accomplished by integrating the Structure from Motion (SfM) algorithm to calculate the transformation parameters. An improved YOLOv8 network is introduced for the high-precision detection of small pedestrian targets, complemented by a laser rangefinder to facilitate accurate 3D locating of targets from varying postures and positions. Furthermore, the integration of a thermal infrared camera facilitates the detection and localization of potential seepage. The experimental validation and application across two real small reservoir dams confirm the accuracy and applicability of the proposed approach, demonstrating the efficiency of the proposed routine UAV surveillance strategy and proving its potential to establish electronic fences and enhance maintenance operations.

APA, Harvard, Vancouver, ISO, and other styles

Guo, Kai, Hang Miao, Lin Liu, Jinghai Zhou, and Ming Liu. "Effect of graphene oxide on chloride penetration resistance of recycled concrete." Nanotechnology Reviews 8, no. 1 (2019): 681–89. http://dx.doi.org/10.1515/ntrev-2019-0059.

Full text

Abstract:

Abstract Graphene oxide (GO) is a nanomaterial with ultra-high strength, good hydrophilicity, and dispersibility. To study the effect of GO on chloride penetration resistance of recycled concrete, the mechanism of action is investigated. The electric flux method is used to test the chloride penetration in recycled concrete specimens with 0, 0.03%, 0.06%, and 0.09% of GO. The volume change, microscopic pore distribution, and micro-structure morphology are characterized using laser rangefinder, and techniques such as X-ray tomography and scanning electron microscopy. The results show that the "coagulation nodule" effect of GO provides a growth basis for cement hydration,which results in a more uniform distribution of the hydrate microcrystals. It fills the micro-cracks of the recycled concrete, reduces the most probable aperture, increases the number of harmless small apertures, and enhances the volume stability of recycled concrete, thereby improving the chloride penetration resistance, which is important for improving the durability of concrete.

APA, Harvard, Vancouver, ISO, and other styles

Mansharamani, N. "Solid state Laser Rangefinders: A Review ." Defence Science Journal 45, no. 4 (1995): 315–24. http://dx.doi.org/10.14429/dsj.45.4139.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Yani, Mohamad, Azhar Aulia Saputra, Wei Hong Chin, and Naoyuki Kubota. "Investigation of Obstacle Prediction Network for Improving Home-Care Robot Navigation Performance." Journal of Robotics and Mechatronics 35, no. 2 (2023): 510–20. http://dx.doi.org/10.20965/jrm.2023.p0510.

Full text

Abstract:

Home-care manipulation robot requires exploring and performing the navigation task safely to reach the grasping target and ensure human safety in the home environment. An indoor home environment has complex obstacles such as chairs, tables, and sports equipment, which make it difficult for robots that rely on 2D laser rangefinders to detect. On the other hand, the conventional approaches overcome the problem by using 3D LiDAR, RGB-D camera, or fusing sensor data. The convolutional neural network has shown promising results in dealing with unseen obstacles in navigation by predicting the unseen obstacle from 2D grid maps to perform collision avoidance using 2D laser rangefinders only. Thus, this paper investigated the predicted grid map from the obstacle prediction network result for improving indoor navigation performance using only 2D LiDAR measurement. This work was evaluated by combining the configuration of the various local planners, type of static obstacles, raw map, and predicted map. Our investigation demonstrated that using the predicted grid map enabled all the local planners to achieve a better collision-free path by using the 2D laser rangefinders only rather than the RGB-D camera with 2D laser rangefinders with a raw map. This advanced investigation considers that the predicted map is potentially helpful for future work in the learning-based local navigation system.

APA, Harvard, Vancouver, ISO, and other styles

Bardachevsky, Nikolai, and Vladimir Litovchenko. "MODULAR COMPLEXES ON THE BASIS OF LASER RANGE." Interexpo GEO-Siberia 9 (2019): 131–36. http://dx.doi.org/10.33764/2618-981x-2019-9-131-136.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Hutt, Daniel L. "Estimating atmospheric extinction for eyesafe laser rangefinders." Optical Engineering 33, no. 11 (1994): 3762. http://dx.doi.org/10.1117/12.181167.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Hulme, K. F. "CO2 laser heterodyne rangefinders, velocimeters and radars." Infrared Physics 25, no. 1-2 (1985): 457–66. http://dx.doi.org/10.1016/0020-0891(85)90121-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Lubchenko, D. A., and A. V. Mazurkevich. "Laser Phase Rangefinders: Ways to Improve Accuracy." Measurement Standards. Reference Materials 19, no. 5 (2024): 59–70. http://dx.doi.org/10.20915/2077-1177-2023-19-5-59-70.

Full text

Abstract:

Scientific and technological progress in the field of geodetic and industrial measurements in terms of the use of laser rangefinders operating in ranges up to 5000 meters has led to a reduction in the error of such measuring instruments over the past ten years by two or more times. Such rapid development of high-precision rangefinder technologies has led to a significant revision of the requirements for their metrological support, as well as to the need to develop a new generation of length standards, the stock of metrological accuracy of which would provide an assessment of the metrological characteristics of all types of existing and promising length measuring instruments with a laser rangefinder. To solve this problem, the Institute’s staff conducted research within the framework of a number of thematic research and development works in terms of developing the appearance of a new generation of length standards operating in the range up to 5000 meters in an open atmosphere. Within the framework of this article, one of the developed models of a high-precision complex of measuring instruments for length and coordinate increments is considered, which is a serial high-precision laser phase light meter, modified by the institute’s staff in terms of the system for receiving and processing measuring signals. At the same time, in order to increase the accuracy of length measurements using the developed range finder layout, it is proposed to investigate ways to reduce the errors of the model components of the boundaries of its error. To ensure the smallest error in determining the hardware correction of the rangefinder layout, it is proposed to use funds from the state primary special standard of the unit of length. As promising ways to reduce the error in determining the phase difference of signals, it is proposed to use digital recording and signal processing devices that implement a method for calculating the phase difference of signals by mathematically processing the recorded data using a specially developed computational algorithm based on Fourier analysis. For the most accurate determination of the values of the pulse repetition frequency of signals and the values of the speed of light on the measured track, it is proposed to improve the means of determining these indicators. The use of the proposed methods to improve the accuracy of measuring the length of laser phase rangefinders allows you to provide the necessary margin of metrological accuracy.

APA, Harvard, Vancouver, ISO, and other styles

Aken, Igor Akendengue, Marjolaine Okanga-Guay, Madi Abaker, et al. "Allometric Equation for Aerial Carbon Estimation (AGC) of Rhizophora racemosa and Avicennia germinans Mangroves of Olende and Ozouri in the Ogooué Delta in Gabon." East African Journal of Forestry and Agroforestry 6, no. 1 (2023): 148–62. http://dx.doi.org/10.37284/eajfa.6.1.1228.

Full text

Abstract:

The global carbon is determined by forests at 45%. Mangroves sequester more carbon per area unit than the dry land forest. The carbon sequestration capacities of mangroves in the Ogooue Delta are still unknown. Thus, this study aims to set up a carbon estimation equation for the species Rhizophora racemosa and Avicennia germinans of the Ogooué Delta mangroves in Gabon. Data was collected in 25 m * 25 m square plots in four sites. The dendrometry parameters collected were mainly diameter at breast height (DBH) with a forest meter and height from the laser rangefinder. The individual basal area and volume of each tree was determined using the Husch et al. (2003) method. This resulted in a fractal-shaped equation of the type: y=αxβ, i.e., AGC = 0.000112*DBH2.466 with a determination rate of 96%, a relative bias of 0.007 and an RMSE of 1.2. This model was developed with a dataset of 47 individuals and validated with 41 individuals, i.e., 53% versus 47%. This study also allowed us to understand that the DBH structure of Ozouri and Olendé mangroves is stable without external disturbance

APA, Harvard, Vancouver, ISO, and other styles

Chen, Shoubin, Jingbin Liu, Teng Wu, et al. "Extrinsic Calibration of 2D Laser Rangefinders Based on a Mobile Sphere." Remote Sensing 10, no. 8 (2018): 1176. http://dx.doi.org/10.3390/rs10081176.

Full text

Abstract:

In the fields of autonomous vehicles, virtual reality and three-dimensional (3D) reconstruction, 2D laser rangefinders have been widely employed for different purposes, such as localization, mapping, and simultaneous location and mapping. However, the extrinsic calibration of multiple 2D laser rangefinders is a fundamental prerequisite for guaranteeing their performance. In contrast to existing calibration methods that rely on manual procedures or suffer from low accuracy, an automatic and high-accuracy solution is proposed in this paper for the extrinsic calibration of 2D laser rangefinders. In the proposed method, a mobile sphere is used as a calibration target, thereby allowing the automatic extrapolation of a spherical center and the automatic matching of corresponding points. Based on the error analysis, a matching machine of corresponding points with a low error is established with the restriction constraint of the scan circle radius, thereby achieving the goal of high-accuracy calibration. Experiments using the Hokuyo UTM-30LX sensor show that the method can increase the extrinsic orientation accuracy to a sensor intrinsic accuracy of 10 mm without requiring manual measurements or manual correspondence among sensor data. Therefore, the calibration method in this paper is automatic, highly accurate, and highly effective, and it meets the requirements of practical applications.

APA, Harvard, Vancouver, ISO, and other styles

Dudnik, Andrey. "Investigation of laser rangefinders with sensor network interface." Technology audit and production reserves 4, no. 2(42) (2018): 35–40. http://dx.doi.org/10.15587/2312-8372.2018.141190.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Vasiliev, V. P., I. V. Znamenskii, and A. A. Tikhomirov. "Simulation of Batch Signal Processing in Laser Rangefinders." Atmospheric and Oceanic Optics 34, no. 5 (2021): 447–54. http://dx.doi.org/10.1134/s1024856021050249.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Aver'yanov, G. A., and A. V. Nuzhin. "Fixing the signal maximum in pulsed laser rangefinders." Journal of Optical Technology 73, no. 8 (2006): 539. http://dx.doi.org/10.1364/jot.73.000539.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Ermakov, Boris A. "Obtaining and processing information in pulsed laser rangefinders." Optical Engineering 31, no. 4 (1992): 768. http://dx.doi.org/10.1117/12.56139.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Xu, Xunqian, Qi Li, Shue Li, et al. "Crack Width Recognition of Tunnel Tube Sheet Based on YOLOv8 Algorithm and 3D Imaging." Buildings 14, no. 2 (2024): 531. http://dx.doi.org/10.3390/buildings14020531.

Full text

Abstract:

Based on the tunnel crack width identification, there are operating time constraints, limited operating space, high equipment testing costs, and other issues. In this paper, a large subway tunnel is a research object, and the tunnel rail inspection car is an operating platform equipped with industrial cameras in order to meet the requirements of the tunnel tube sheet crack width recognition of more than 0.2 mm, with the measuring instrument to verify that the tunnel rail inspection car in the state of uniform motion camera imaging quality has the reliability through the addition of laser rangefinders, the accurate measurement of the object distance and the calculation of the imaging plane and the angle of the plane to be measured, to amend the three-dimensional cracks. The pixel resolution of the image is corrected, the images imaged by the industrial camera are preprocessed, the YOLOv8 algorithm is used for the intelligent extraction of crack morphology, and finally, the actual width is calculated from the spacing between two points of the crack. The crack detection width obtained by image processing using the YOLOv8 algorithm is basically the same as the value of crack width obtained by manual detection, and the error rate of crack width detection ranges from 0% to 11%, with the average error rate remaining below 4%. Compared with the crack detection error rate of the Support Vector Machine (SVM), the crack extraction model is reduced by 1%, so using the tunnel inspection vehicle as a platform equipped with an industrial camera, YOLOv8 is used to realize the recognition of the shape and width of the cracks on the surface of the tunnel tube sheet to meet the requirements of a higher degree of accuracy. The number of pixels and the detection error rate are inversely proportional to each other. The angle between the imaging plane and the plane under test is directly proportional to the detection error rate. The angle between the vertical axis where the lens midpoint is located and the line connecting the shooting target and the lens center point is αi and the angle θi between the measured plane and the imaging plane is reciprocal, i.e., αi + θi = 90°. Therefore, using the inspection vehicle as a mobile platform equipped with an industrial camera and based on the YOLOv8 algorithm, the crack recognition of the tunnel tube sheet has the feasibility and the prospect of wide application, which provides a reference method for the detection of cracks in the tunnel tube sheet.

APA, Harvard, Vancouver, ISO, and other styles

Tian, Long, Jianhui Zhao, Bing Pan, and Zhaoyang Wang. "Full-Field Bridge Deflection Monitoring with Off-Axis Digital Image Correlation." Sensors 21, no. 15 (2021): 5058. http://dx.doi.org/10.3390/s21155058.

Full text

Abstract:

Video deflectometer based on using off-axis digital image correlation (DIC) has emerged as a robust non-contact optical tool for deflection measurements of bridges. In practice, a video deflectometer often needs to measure the deflections at multiple positions of the bridge. The existing 2D-DIC-based measurement methods usually use a laser rangefinder to measure the distance from each point to the camera to obtain the scale factor for the point. It is only suitable for the deflection measurements of a few points since manually measuring distances for a large number of points is time consuming and impractical. In this paper, a novel method for full-field bridge deflection measurement based on off-axis DIC is proposed. Because the bridge is usually a slender structure and the region of interest on the bridge is often a narrow band, the new approach can determine the scale factors of all the points of interest with a spatial straight-line fitting scheme. Moreover, the proposed technique employs reliability-guided processing and a fast initial parameter estimation strategy for real-time and accurate image-matching analysis. An indoor cantilever beam experiment verified the accuracy of the proposed approach, and a field test of a high-speed railway bridge demonstrated the robustness and practicability of the technique.

APA, Harvard, Vancouver, ISO, and other styles

Biresaw, Mahtot Alemu, and J. Pavliš. "Vegetation structure and density of woody plant species in two woodland areas of Amhara National Regional State, Ethiopia." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 58, no. 1 (2010): 21–32. http://dx.doi.org/10.11118/actaun201058010021.

Full text

Abstract:

This study was conducted in Jawi and East Belesa districts of the Amhara National Regional State in Ethiopia. It has an objective of describing the vegetation structure in relation to different environmental factors in general and Boswellia papyrifera, which is economically important species in particular. Vegetation data were collected in both sites (Mosebit and Hamusit) using plots of 50 m x 50 m (0.25 ha). In total 15 sample plots were set up. In each plot, all trees with DBH (Diameter at Breast Height), i.e. at 1.3 m above the ground were measured using caliper. In each major plot four subplots (4 m × 4 m) were established. Tree height measured using Hypsometer (Vertex III). Data’s on different environmental variables (slope, aspect and altitude) of each plot were also taken respectively using laser rangefinder Impulse 200 Standard, an electronic compass Map-Star Module II and GPS Juno™ ST handheld (Trimble, USA). A total of 58 woody species belonging to 22 families were identified from both sites. A total of 241 trees/ha and 292 trees/ha were found in Mosebit and Hamusit study sites, respectively. The seedling density result indicates 3656 seedlings/ha and 2469 seedlings/ha in Mosebit and Hamusit study areas, respectively. The density of Boswellia Papyrifera, which is economically important species were 140 and 127 tree/ha in Mosebit, and Hamusit study areas, respectively. The relative density of different tree species in different height and diameter classes were determined by altitude, aspect, and gradient of the study areas. The study result concludes that distribution of the species, relative density, height class and diameter class of species in the two sites is dependent on environmental factors. Finally, the findings indicate that the two woodlands harbor, economically important tree species. Therefore, giving due attention in conserving these wood lands is important from ecological, economical and conservation point of view.

APA, Harvard, Vancouver, ISO, and other styles

Brahynets, I. O., and Yu O. Masjurenko. "EFFICIENCY OF OPTICAL CALIBRATION IN HIGH PRECISION LASER RANGEFINDERS." Tekhnichna Elektrodynamika 2023, no. 5 (2023): 74–81. http://dx.doi.org/10.15407/techned2023.05.074.

Full text

Abstract:

The effectiveness of the use of optical calibration in high-precision phase laser rangefinders has been evaluated. In order to ensure the specified accuracy of distance determination in order to establish the optimal frequency of distance measurement modes and optical calibration, an appropriate formula is recommended for estimating the switching frequency of signals at the input of the range finder measuring channel. It has been established that even when using optical calibration, the accuracy of distance measurement is affected by the error of the phase detector, which is part of the rangefinder. To minimize the influence of this error, a new method for the direct measurement of the phase shift in a range finder is proposed, as well as the use of a compensation method for measuring the phase shift. The corresponding block diagrams of rangefinders are considered, in which the proposed methods for measuring phase landslides are implemented, and analytical modeling of the processes that transform them is carried out. References 7, figures 2.

APA, Harvard, Vancouver, ISO, and other styles

Morozov, A. N., A. L. Nazolin, and I. L. Fufurin. "Optical and Spectral Methods for Detection and Recognition of Unmanned Aerial Vehicles." Radio Engineering, no. 2 (May 17, 2020): 39–50. http://dx.doi.org/10.36027/rdeng.0220.0000167.

Full text

Abstract:

The paper considers a problem of detection and identification of unmanned aerial vehicles (UAVs) against the animate and inanimate objects and identification of their load by optical and spectral optical methods. The state-of-the-art analysis has shown that, when using the radar methods to detect small UAVs, there is a dead zone for distances of 250-700 m, and in this case it is important to use optical methods for detecting UAVs.The application possibilities and improvements of the optical scheme for detecting UAVs at long distances of about 1-2 km are considered. Location is performed by intrinsic infrared (IR) radiation of an object using the IR cameras and thermal imagers, as well as using a laser rangefinder (LIDAR). The paper gives examples of successful dynamic detection and recognition of objects from video images by methods of graph theory and neural networks using the network FasterR-CNN, YOLO and SSD models, including one frame received.The possibility for using the available spectral optical methods to analyze the chemical composition of materials that can be employed for remote identification of UAV coating materials, as well as for detecting trace amounts of matter on its surface has been studied. The advantages and disadvantages of the luminescent spectroscopy with UV illumination, Raman spectroscopy, differential absorption spectroscopy based on a tunable UV laser, spectral imaging methods (hyper / multispectral images), diffuse reflectance laser spectroscopy using infrared tunable quantum cascade lasers (QCL) have been shown.To assess the potential limiting distances for detecting and identifying UAVs, as well as identifying the chemical composition of an object by optical and spectral optical methods, a described experimental setup (a hybrid lidar UAV identification complex) is expected to be useful. The experimental setup structure and its performances are described. Such studies are aimed at development of scientific basics for remote detection, identification, tracking, and determination of UAV parameters and UAV belonging to different groups by optical location and spectroscopy methods, as well as for automatic optical UAV recognition in various environments against the background of moving wildlife. The proposed problem solution is to combine the optical location and spectral analysis methods, methods of the theory of statistics, graphs, deep learning, neural networks and automatic control methods, which is an interdisciplinary fundamental scientific task.

APA, Harvard, Vancouver, ISO, and other styles

Медведев, А. В., А. В. Гринкевич та С. Н. Князева. "Пассивные дальномеры: от оптических к оптико-электронным системам". PHOTONICS Russia 14, № 4 (2020): 344–58. http://dx.doi.org/10.22184/1993-7296.fros.2020.14.4.344.358.

Full text

Abstract:

Пассивные оптические дальномеры обладают скрытностью, но не обеспечивают высокой точности измерения дальности в сравнении с лазерными дальномерами. Предложены новые оптические решения на основе комбинации цифровых методов и оригинальных оптических решений. Комбинация обеспечивает разнообразные варианты малогабаритных пассивных прицелов-дальномеров с высокой точностью измерения дальности до цели при скрытности измерений. Passive optical rangefinders provide stealth, but do not provide high accuracy range measurements in comparison with laser ones. New optical solutions based on a combination of digital methods and original optical solutions are proposed. The combination provides a variety of options for small-sized passive sights-rangefinders with high accuracy of measuring the distance to the target with secretive measurements.

APA, Harvard, Vancouver, ISO, and other styles

Kozlov, V. L. "Precision rangefinders based on a two-wave injection laser." Journal of Optical Technology 75, no. 9 (2008): 585. http://dx.doi.org/10.1364/jot.75.000585.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Ye, C., and J. Borenstein. "A Novel Filter for Terrain Mapping With Laser Rangefinders." IEEE Transactions on Robotics 20, no. 5 (2004): 913–21. http://dx.doi.org/10.1109/tro.2004.829457.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Panangadan, Anand, Maja Matarić, and Gaurav S. Sukhatme. "Tracking and Modeling of Human Activity Using Laser Rangefinders." International Journal of Social Robotics 2, no. 1 (2010): 95–107. http://dx.doi.org/10.1007/s12369-009-0043-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Larochelle, V., D. Hutt, D. Bonnier та J. M. Thériault. "-μm eyesafe laser rangefinders performance under adverse weather conditions". Infrared Physics 34, № 4 (1993): 421–39. http://dx.doi.org/10.1016/0020-0891(93)90074-h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Orekhova, V. E., V. E. Kisel, and K. A. Orekhov. "Diode-Pumped Laser for Rangefinders Operating over Wide Temperature Range." Devices and Methods of Measurements 14, no. 1 (2023): 27–37. http://dx.doi.org/10.21122/2220-9506-2023-14-1-27-37.

Full text

Abstract:

A prototype of a pulsed diode-pumped laser based on Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) crystal emitting at 1064 nm is presented for use in airborne rangefinders and atmospheric LIDARs without use of expensive production technologies and components.Actively Q-Switched laser pulse energy was estimated. Spatial characteristics of laser beam and dependence of pulse energy on the pump pulse energy were obtained at room temperature. Results of diodepumped laser pulse energy measurements are provided within 2 min for pulse repetition rates of 1, 4, 12.5, 22 Hz at ambient temperature range from -40 to +60 °C. Laser diode arrays temperature stabilization was achieved by the use of Peltier module with cooling capacity of 30 W.Pulse energy values not less than 80 mJ were achieved in the studied ranges of ambient temperature and pulse repetition rate. Laser beam divergence at room temperature does not exceed 1.9 mrad.

APA, Harvard, Vancouver, ISO, and other styles

Mykytenko, Volodymyr, Volodymyr Senatorov, and Oleksander Melnyk. "INCREASING OF AIMING AND SEARCH SYSTEM OF LAND UNMANNED COMPLEX DURABILITY." Bulletin of Kyiv Polytechnic Institute. Series Instrument Making, no. 61(1) (June 30, 2021): 26–31. http://dx.doi.org/10.20535/1970.61(1).2021.237088.

Full text

Abstract:

Proposals on composition of the aiming and search system of land unmanned complex are offered. The work aims to improve one of the most important technical characteristics of land unmanned complex - survivability. Proposals are given for improving the layout of aiming and search system of land unmanned complex. Existing composition schemes have a low firing life because of the devices included in its structure have are installed into general body. Sniper impact in body makes ineffective all aiming and search system. Authors proposes to install the devices into two bodies along weapon sides. TV-sight should be installed into the first body and thermal-vision sight should be installed into the second body. Then if sniper impact is affecting one body, then the devices of the second body are able to execute a battle task with some limitations thanks to efficient sight. The issues of controlling the stability of the aiming line of the aiming and search system at the stage of bench tests using a collimation-measuring unit are considered in detail. A technique for adjusting both television and thermal imaging sights is proposed. In addition to increasing the survivability of the entire unmanned complex, the proposed technical solution has a number of other advantages. First, the "cold" zeroing of the combat module is greatly simplified. Instead of a system of two penta mirrors, a BS-0 ° rhombus prism can be used for this. Secondly, the proposed layout potentially simplifies the further modernization of aiming and search system, which would require the inclusion of additional units. For example, to expand the functionality of the complex by analyzing the polarization of radiation from objects and backgrounds, an additional volume is provided to accommodate polarimetric attachments. Thirdly, an even greater increase in the survivability of the complex can be achieved by increasing the secrecy of the combat mission. Usage of the base distance between the entrance pupils of the sights makes it possible to passively measure the range to the target using the internal base rangefinder instead of the laser rangefinder.

APA, Harvard, Vancouver, ISO, and other styles

Rymeš, Jiří, Jan Červenka, and Radomír Pukl. "Advanced modelling of concrete structures for improved sustainability." Acta Polytechnica CTU Proceedings 38 (December 21, 2022): 190–95. http://dx.doi.org/10.14311/app.2022.38.0190.

Full text

Abstract:

The safe and long-term serviceability of concrete structures is one of the methods how to improve the sustainability of the concrete industry. This study presents a pilot application of an~integrated system for online monitoring and service life prediction of concrete bridges. The system consists of strain gauges measuring the structural response coupled with a laser rangefinder for detection of the bridge-crossing traffic. The measured data were used for the development of a computational model of the bridge. Next, the deterioration models were applied to the model to assess the long-term mechanical behaviour. In this study, we considered chloride-induced reinforcement corrosion. The numerical data are given for 100-years-long service life prediction.

APA, Harvard, Vancouver, ISO, and other styles

Du, Meng, Jia Fan, Yuchun Huang, and Min Cao. "Mosaicking of mountain tunnel images guided by laser rangefinder." Automation in Construction 127 (July 2021): 103708. http://dx.doi.org/10.1016/j.autcon.2021.103708.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Fernández-Moral, Eduardo, Javier González-Jiménez, and Vicente Arévalo. "Extrinsic calibration of 2D laser rangefinders from perpendicular plane observations." International Journal of Robotics Research 34, no. 11 (2015): 1401–17. http://dx.doi.org/10.1177/0278364915580683.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Khan, Sikandar M. Zulqarnain, and Giorgio Buttazzo. "Increasing the resolution of laser rangefinders using low frequency pulses." International Journal of Embedded Systems 9, no. 2 (2017): 157. http://dx.doi.org/10.1504/ijes.2017.083735.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Full text

APA, Harvard, Vancouver, ISO, and other styles

Lubchenko, Daria A., and Oleg V. Kolmogorov. "Enhancing the accuracy of length measurements using laser phase rangefinders." Journal of Optical Technology 91, no. 4 (2024): 261. http://dx.doi.org/10.1364/jot.91.000261.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Dobrzanska, Magdalena, and Pawel Dobrzanski. "Automatic Correction of an Automated Guided Vehicle’s Course Using Measurements from a Laser Rangefinder." Applied Sciences 12, no. 24 (2022): 12826. http://dx.doi.org/10.3390/app122412826.

Full text

Abstract:

In order for AGVs to be able to effectively carry out the tasks assigned to them, it is important to accurately determine their position and orientation in the working space. Having data on the location of an AGV is crucial for the navigation process, and the most commonly used odometry method is unreliable due to errors. To correct these errors, additional measuring systems are used. These systems use a variety of sensors. Some of the most widely used types are laser rangefinders. These sensors are also used in the automatic course correction methodology that is developed and presented in this article. The measurements from laser rangefinders are used to determine the shift of the actual trajectory from the set one, and then to guide the AGV to the previously set course. The developed methodology is experimentally verified on the basis of several dozen test drives. The conducted experimental studies prove the correctness of the developed methodology. The proposed course correction algorithm can be implemented in most working conditions, and guarantees correct passage over the given route.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!