Relevant bibliographies by topics / Non-contact measuring methods

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Non-contact measuring methods'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Non-contact measuring methods.'

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.

Journal articles on the topic "Non-contact measuring methods"

1

SATO, Atsushi. "Non-contact Measuring Methods for Areal Surface Texture." Journal of the Japan Society for Precision Engineering 81, no. 10 (2015): 922–25. http://dx.doi.org/10.2493/jjspe.81.922.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Yan, Qing Dong, Cheng Liu, and Wei Wei. "Comparative Research on Contact and Non-Contact Measuring Methods of 3D Twisted Blades in a Torque Converter." Advanced Materials Research 139-141 (October 2010): 2102–6. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.2102.

Full text
Abstract:
The contact and non-contact measuring methods were adopted to measure the twisted blades of the turbine in a casting torque converter. The curves were reconstructed using the B-spline and Bezier curve. Then the blade parameters were extracted based on the conformal transformation. Compared with the original data of the designed blades, measuring results of both methods were effective, while errors existed during both measuring processes including data missing error, measurement error and fitting error. Compared with the contact measuring method, the non-contact measuring method needed improvement because of its larger errors, which is mainly caused by the shrink and distortion of silicone rubber. But non-contact measuring method will be a trend in measurement system because of its own advantages such as expeditiousness, automation and the ability of acquiring relatively comprehensive information.
APA, Harvard, Vancouver, ISO, and other styles
3

Batanov, S. D., O. S. Starostina, and I. A. Baranova. "Non-contact methods of cattle conformation assessment using mobile measuring systems." IOP Conference Series: Earth and Environmental Science 315 (August 23, 2019): 032006. http://dx.doi.org/10.1088/1755-1315/315/3/032006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Mordasov, M. M., A. P. Savenkov, and K. E. Chechetov. "Non-contact methods for measuring the surface tension of liquids (review)." Industrial laboratory. Diagnostics of materials 86, no. 4 (April 23, 2020): 29–38. http://dx.doi.org/10.26896/1028-6861-2020-86-4-29-38.

Full text
Abstract:
A review of non-contact methods for determining the surface tension of liquids along with analysis of the physical effects underlying them is presented. A review of non-contact methods for determining the surface tension of liquids along with analysis of the physical effects underlying them is presented. The advantages, disadvantages, possible ranges of measurements and scope of non-contact methods are discussed. Passive methods do not require any stimulation of the measurement object whereas active methods, when implemented, affect the liquid under study. Electrical, electromagnetic, acoustic, jet, and mechanical methods used for excitation of capillary waves are described in analysis of the methods based on capillary waves intended to study the properties of surface-active substances. We also considered methods based on the processes occurred in an oscillating or rotating levitating drop of liquid (containerless technology) used to study the properties of melts and methods based on local deformation of the liquid surface by the electric field, acoustic pulse, and gas jet. It is shown that aerodynamic methods based on deformation of the liquid surface under control by a gas stream are the most promising for standard laboratory conditions. It is noted that containerless methods should be used in zero gravity tests, whereas the methods based on capillary waves or deformation of the liquid surface with a focused acoustic pulse appeared useful in testing inviscid liquids. Methods based on electrical deformation of the liquid surface under control are limited with the thickness of the liquid layer, relatively high sensitivity to the density and dielectric constant of the liquid, and some other uncontrolled factors. It was also noted that aerodynamic non-contact method of the surface tension determination is characterized by low sensitivity to the density and viscosity of the controlled liquid. The presented review of non-contact methods of the surface tension determination provides optimal choice of the method most suited for solving specific measurement problems.
APA, Harvard, Vancouver, ISO, and other styles
5

MIYAMOTO, KOZO. "Special issue on high accuracy optical and non-contact measuring techniques. Measurement of surfaces with contact and non-contact methods." Journal of the Japan Society of Precision Engineering 51, no. 4 (1985): 674–80. http://dx.doi.org/10.2493/jjspe1933.51.674.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Costa, John E., Kurt R. Spicer, Ralph T. Cheng, F. Peter Haeni, Nick B. Melcher, E. Michael Thurman, William J. Plant, and William C. Keller. "measuring stream discharge by non-contact methods: A Proof-of-Concept Experiment." Geophysical Research Letters 27, no. 4 (February 15, 2000): 553–56. http://dx.doi.org/10.1029/1999gl006087.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Shang, Xiao Mei, Jie Chen, and Zhong Yi Wang. "Stability and Correlation Analysis of Data Obtained by Contact and Non-Contact Measuring Body." Advanced Materials Research 156-157 (October 2010): 600–606. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.600.

Full text
Abstract:
Today, high technology is transforming traditional industry. The science, suitable measuring technique and data application method are the basis of large-scale manufacture realizing, which not only meet individual consumer demand, but also are meaningful to raise the economic efficiency and reduce production cycle of custom-made. Custom-made enterprise always has its own contact measuring method and mechanism, which uses uniform size clothing to wear or measurement by manual re-confirm to obtain data.The efficiency of this method is low and its accuracy is poor. But non-contact measuring method has problems in application of equipment and can not completely replace manual operation. How make manual measuring method and laser measuring instruments work together to get data is the demand of practical management and production improvement in enterprise, but there is no data standard between the two methods. This research based on national size standard and professional normative measuring method, and used manual and three-dimensional laser measuring ways to collect sample data in identical situation. Under designed data standard, the research used mathematical statistics to analyse data, and then made comprehensive assessment in aspects of instrumental stability and data correlation. This paper is the case of practical application, among which used to study the tolerance range of the standard data was initial issue (sci-tech novelty report was attached).
APA, Harvard, Vancouver, ISO, and other styles
8

Domański, Tomasz. "Examples of modern methods of measuring deformations." MATEC Web of Conferences 157 (2018): 05004. http://dx.doi.org/10.1051/matecconf/201815705004.

Full text
Abstract:
The work presents examples of possibilities created by multi-unit 3D correlation system. Experience is the non-contact measurement of displacement and strains of slender compression bars or tensile samples. Experimental research show that as a result of axial compression of slender elements with the length substantially exceeding the cross-sectional dimensions, element destruction occurs at loads less than the respective compressive strength, resulting in deformation of the object. We present the results of numerical analysis, compared with exercise of carrying on a test bench.
APA, Harvard, Vancouver, ISO, and other styles
9

ONDA, Minoru, and Ryuichi HIRAKAWA. "INFLUENCES OF WIND VELOCITY ON MEASURING ACCURACY WITH DIFFERENT NON-CONTACT MEASUREMENT METHODS." Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 72, no. 4 (2016): I_901—I_906. http://dx.doi.org/10.2208/jscejhe.72.i_901.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Klemm, Agnieszka J., Piotr Klemm, Kazimierz Rozniakowski, and Tomasz W. Wojtatowicz. "Non-contact methods of measuring moisture concentration in external layers of building partitions." Building and Environment 37, no. 12 (December 2002): 1233–40. http://dx.doi.org/10.1016/s0360-1323(01)00123-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Non-contact measuring methods"

1

Novotný, Jan. "Návrh specielního měřicího zařízení pro kontrolu sražení hran." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231657.

Full text
Abstract:
This diploma thesis consist of basic overview of contact and non-contact measuring methods used at present days across industrial Applications. On the base of given specification for designing of measuring station for measuring chamfer of rotary components The choice and evaluation of theoretical applicability for our application is performed. In the practical part of this diploma thesis The applicability is verified. Performance of these a few exemplary measuring shows possible way of design of constructional solution. All this in a close cooperation with company MESING.
APA, Harvard, Vancouver, ISO, and other styles
2

Horáček, Kryštof. "Aplikace měřicích sond v procesu frézování na CNC stroji MCV1210." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400954.

Full text
Abstract:
This diploma thesis focuses on the application of measuring probes in the machining process. The main goal of the thesis is to create sample procedures for measuring cycles and functions in a CNC machining process using MCV 1210 and selected measuring software. In the first part of the thesis available methods of machine measurement are outlined with a great emphasis on the description of measurement principles, construction, and measurement signal transmission methods between tool probes and the workpiece. The second part of the thesis deals with the application of measuring probes in the machining of the designed test piece using the Productivity+TM and Sinumerik ShopMill softwares. The work also includes an economic evaluation of the profit of an investment in the mentioned measuring equipment.
APA, Harvard, Vancouver, ISO, and other styles
3

Adenot, Sébastien. "Etude de capteurs magnétiques de position angulaire." Phd thesis, Grenoble INPG, 1996. http://tel.archives-ouvertes.fr/tel-00531702.

Full text
Abstract:
Dans une grande variété d'applications, les capteurs de position sont requéris pour contrôler un processus. Pour ce type de capteurs, il existe plusieurs, technologies: codeurs optiques, -potentiomètres électriques et capteurs magnétiques. Toutes ces technologies ont leur champs d'applications et aussi leur prix. Quand un faible prix et une production en très grande série sont requéris beaucoup de ces technologies de capteurs ne respectent ces conditions. Par exemple, le potentiomètre donne un signal bruité par le contact électrique glissant et a une faible durée de vie. Par contre, les capteurs magnétiques sont intéressants par leur fonctionnement sans contact. On commence par exposer les principes des capteurs magnétiques. Les principales structures de capteurs magnétiques sont présentées. Une nouvelle structure de capteur à aimants permanents et à sondé de Hall est proposée. Ces nouveaux capteurs ont une faible sensiblité aux défauts de réalisation des pièces du circuit magnétique (aimant, pièces ferromagnétiques) et une faible sensibilité à la température. Dans la dernière partie de la thèse, nous comparons les résultats d'une modélisation numérique (éléments finis) et analytique avec ceux mesurés sur un prototype.
APA, Harvard, Vancouver, ISO, and other styles
4

Chen, Ting-Wei, and 陳丁緯. "Measuring heart rate with non-contact method and its application to elderly care." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/87618021780138247565.

Full text
Abstract:
碩士
國立交通大學
資訊科學與工程研究所
104
Thanks to the technology become more advanced, the population of the elderly people become lager, which cause many elderly people live alone with others’ care. In order to avoid these people dying without anyone notice, this thesis provide a new method to achieve the elderly care. The method not only can found out whether the elderly are still alive immediately, but also measuring their heart rate. If his or her heart rates become unusual, someone can notice that immediately through this system. Independent component analysis, a method to analyze signals, can find the independent signals from the mixed signals, and further estimate the heart rate. To distinguish if the elderly is alive, this thesis use the variance on the face while a person’s heart is beating and a person’s move while he or she is breathing. We use picture of a human to simulate a dead person. Combine the method above we provide a method that didn’t invade the elderly’s privacy, but take good care of the elderly.
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Non-contact measuring methods"

1

"Machining Mechanism of Minimum Quantity Lubrication Grinding." In Enhanced Heat Transfer Mechanism of Nanofluid MQL Cooling Grinding, 43–75. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1546-4.ch003.

Full text
Abstract:
To facilitate the analysis of experimental theory, this chapter studied the machining mechanism related to the grinding of NMQL and the three mechanisms of sliding, ploughing, and cutting of the abrasive grinding process. A mathematical model of the micro-grinding force was established, and the micro-grinding force can be used to express the force of the grinding zone. The grinding force component was divided into the force of cutting and sliding, removing the constant cutting force during the grinding process, retaining the varying sliding friction force, and determining the sliding friction coefficient to characterize the lubrication performance. It reflected the influence of different lubrication conditions on the friction part. The methods for measuring the temperature during grinding were introduced, including direct contact temperature measurement and non-contact temperature measurement. At present, thermocouple temperature measurement is a commonly used and more accurate temperature measurement method, and the characteristics of each temperature measurement method were analyzed.
APA, Harvard, Vancouver, ISO, and other styles
2

Rout, Anil Kumar, Niranjan Sahoo, and Vinayak Kulkarni. "An Overview of Stress and Strain Measurement Techniques." In Applications and Techniques for Experimental Stress Analysis, 39–56. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1690-4.ch003.

Full text
Abstract:
Stress and strain are mechanical behaviour of materials, subjected to mechanical or thermal loading. The detrimental effect of such loading is the ultimate failure of materials due to generation of high stress and strain. Therefore, measurement and prediction of stress and strain values help in proper design and maintenance of engineering equipment and structures. The present contents elaborate and summarize different methods adopted by researchers for mechanical stress and strain measurements. The content is focused to provide an overview regarding the measurement techniques adopted for strain measurement. The analysis holds information regarding working principle of different strain measuring technique along with a brief description about the history of strain measurement. Special attention has also been devoted for explanation of thermal stress and strain measurement techniques. The modern non-contact techniques have evolved as a potential tool for such measurements even at higher temperature conditions.
APA, Harvard, Vancouver, ISO, and other styles
3

Ossoinig, Karl C. "The development of ultrasound in ophthalmology." In Ultrasound in Clinical Diagnosis. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199602070.003.0020.

Full text
Abstract:
The clinical applications of diagnostic ultrasound in ophthalmology were initiated by G.H. Mundt and w.F. Hughes ( 1 ) (1956) as well as A. Oksala and A. Lehtinen ( 2 ) (1957) introducing A-scan, and by G. Baum ( 3 ) (1958) introducing and pioneering B-scan. The first medical society for diagnostic ultrasound was founded in 1964 (Societas Internationalis de Diagnostica Ultrasonica in Ophthalmologia) with subsequent biennial congresses. Ophthalmic diagnostic ultrasound is the only ultrasonographic method heavily relying on A-scans besides the B-scans. Today, four distinct echographic methods (utilizing different types of instrumentation) are being used in ophthalmology: 1) Biometric A-scans for measuring the axial eye length. 2) Low-frequency B-scans for the examination of the posterior eye segment and the anterior orbit utilizing 10–20MHz. 3) High-frequency B-scans for the evaluation of the anterior eye segment applying 25–50MHz. 4) Standardized Echography , a combination of diagnostic as well as biometric A-scan (8MHz) and B-scan echography (10–50MHz) for a comprehensive ultrasonographic examination of the eye (anterior and posterior segments) and of the entire orbit and periorbital region. A-scan (8–12MHz) is used for measurements of the axial eye length, today an important contribution to the calculation of intraocular lens power in cataract surgery. F. Jansson ( 4 ) (1963) proposed biometric A-scan as an immersion (non-touch) technique and also measured the involved sound velocities of the anterior chamber, the lens, and the vitreous cavity which since then have been the accepted standard values. At first, axial eye length measurements were mostly used in studies regarding glaucoma and myopia. when, in the early 1970s, the implantation of artificial lenses during cataract surgery spread quickly, the much more precise but more time-consuming and demanding immersion method temporarily gave way to an easier and quicker contact method. Lately, however, advances in cataract surgery, especially the use of multifocal lenses as well as the competition from laser technology, resulted in a return of Jansson’s immersion method.
APA, Harvard, Vancouver, ISO, and other styles
4

Cohen, DDS, MS, PhD, Nicolas. "Periodontal Treatment and Computerized Occlusal Analysis." In Oral Healthcare and Technologies, 75–111. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1903-4.ch002.

Full text
Abstract:
This chapter addresses the ongoing controversy regarding occlusion's role in the progression of periodontal disease. Occlusal force has been considered a non-factor in the initiation of periodontal attachment loss. However, the absence of a validated measuring device or quantifying method for analyzing the occlusion has contributed to the confusion that still exists in the scientific community today about the relationship between periodontal disease and occlusion. The development of the T-Scan occlusal measurement technology, which is independent of a clinician's occlusal contact force level subjective assessment, may change the scientific opinion about occlusion's role in periodontal disease. This chapter illustrates how the T-Scan 8 system aids in treating patients who have tissue loss and occlusal issues. Notably, after the major etiologic risk factors of periodontal disease have been controlled, adjusting the occlusion with the T-Scan improves healing outcomes resulting in less inflammation, decreased probing depths, and bone level stability.
APA, Harvard, Vancouver, ISO, and other styles
5

Cohen, DDS, MS, PhD, Nicolas. "Periodontal Treatment and Computerized Occlusal Analysis." In Handbook of Research on Computerized Occlusal Analysis Technology Applications in Dental Medicine, 791–828. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-6587-3.ch018.

Full text
Abstract:
This chapter addresses the ongoing controversy regarding occlusion's role in the progression of periodontal disease. Occlusal force has been considered a non-factor in the initiation of periodontal attachment loss. However, the absence of a validated measuring device or quantifying method for analyzing the occlusion has contributed to the confusion that still exists in the scientific community today about the relationship between periodontal disease and occlusion. The development of the T-Scan occlusal measurement technology, which is independent of a clinician's occlusal contact force level subjective assessment, may change the scientific opinion about occlusion's role in periodontal disease. This chapter illustrates how the T-Scan 8 system aids in treating patients who have tissue loss and occlusal issues. Notably, after the major etiologic risk factors of periodontal disease have been controlled, adjusting the occlusion with the T-Scan improves healing outcomes resulting in less inflammation, decreased probing depths, and bone level stability.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Non-contact measuring methods"

1

Costa, John E., R. T. Cheng, F. P. Haeni, N. B. Melcher, K. R. Spicer, W. J. Plant, W. C. Keller, and K. Hayes. "Looking to the Future: Non-contact Methods for Measuring Streamflow." In Hydraulic Measurements and Experimental Methods Specialty Conference (HMEM) 2002. Reston, VA: American Society of Civil Engineers, 2002. http://dx.doi.org/10.1061/40655(2002)1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ellis, Jon, and Michael A. Echter. "Non-contact, Point-to-point Methods for Measuring Freeform Optics." In Optical Fabrication and Testing. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/oft.2014.ow2b.5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Stork, Milan, and Josef Houzar. "Non Contact Methods of Heart Rate Variability Measuring and Analysis." In 2020 International Conference on Applied Electronics (AE). IEEE, 2020. http://dx.doi.org/10.23919/ae49394.2020.9232744.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Prochazka, Pavel. "Methods and measuring systems for calibration of non-contact vibrodiagnostics systems." In 2017 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). IEEE, 2017. http://dx.doi.org/10.1109/i2mtc.2017.7969666.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Esterling, Donald, F. Donald Caulfield, Aaron Kiefer, Gregory Buckner, and Pavan Jaju. "Non-Contact Device for Measuring Frequency Response Functions of CNC Machine Tools." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42264.

Full text
Abstract:
The frequency response function (FRF) of a CNC machine tool is composed of tool/toolholder/spindle dynamics, and plays an important role in determining the stability of high speed machining processes. This paper details the design, development and operational verification of a non-contacting, controllable, electromechanical actuator (EMA) for measuring the FRFs of tools mounted in CNC milling machines. Although standard modal testing methods are available and provide similarly accurate results, these test procedures are difficult to perform in machine shop environments and can require expensive equipment. The EMA developed as part of this research extends the capabilities of the NIST “best speeds device” to provide controllable, non-contacting excitation for modal tests on machine tools. This EMA device offers the advantages of being accurate, easy to use, and applicable to a wide variety of tools and operating conditions.
APA, Harvard, Vancouver, ISO, and other styles
6

Matsumoto, Akira, Yasuhiro Sato, Hiroyuki Ohno, Masao Tomeoka, Kosuke Matsumoto, Jun Kurihara, Tomohisa Ogino, et al. "A New Measuring Method of Wheel-Rail Contact Forces." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84682.

Full text
Abstract:
A new measuring method introduced in this paper can measure contact forces between wheel and rail without special wheelsets with slip rings or telemeters. In this method the lateral contact force is measured from the lateral distortion of wheel measured by several non-contact gap sensors. The measured values are small, but accurate value of lateral force can be calculated by the compensation of axial movement and inclination of wheelset. Normal and longitudinal contact forces are also measured from the strain of parts of the truck except wheelsets. According to the results of full-size truck stand tests and train running tests, we have verified that the new method has sufficient accuracy of measuring compared with conventional methods.
APA, Harvard, Vancouver, ISO, and other styles
7

Schaber, Ulrich. "Non-Contact Vibration Measurements of Mistuned Coupled Blades." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-190.

Full text
Abstract:
Most of the turbomachine manufacturers are using a non-contact measurement system to measure blade vibration by two probes located in the casing radially outside a blade row. All blades of a row can be observed by this system, therefore it may be considered to be an ideal solution for measuring the vibration response of mistuned blades which have quite different vibration levels from blade to blade in resonance conditions. By a simple calculation model a non-contact blade vibration measurement was simulated. It was found that for mistuned coupled blades the non-contact measurement results show some deviations from the actual vibration amplitudes. Different mistuning conditions have been investigated by a parameter study to estimate the inherent measurement error of the non-contact principle. Measurements at a circumferentially coupled gas turbine blading performed by a non-contact system and by strain gauges did also show deviations in the results obtained by the two measurement methods.
APA, Harvard, Vancouver, ISO, and other styles
8

Shetty, Devdas, Suhash Ghosh, Claudio Campana, and Mustafa Atalay. "A New Precision Non-Contact Laser-Based Hybrid Measurement Methodology." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63954.

Full text
Abstract:
Precise and accurate manufacturing became an obligation in aerospace industry in last decades. Uniformity of turbine blades, nozzle geometries, gaps, diameter changes and misalignment issues in turbine assemblies have to be inspected carefully in terms of quality and exactitude. Like broadly used aluminum and titanium based materials, ceramics and special coated composites are also used in aerospace applications. A wide selection of measurement methods used is based on intensity sensing and range imaging. With the recent development in advanced laser techniques, new methods that involve non contact measurement methodologies are being investigated by many industries. In addition to their accuracy and precision, speed of measurement and compactness of such systems are also of high significance. In this paper, a hybrid approach consisting of laser based triangulation, photogrammetry and edge detection techniques has been investigated to measure inner surfaces of parts that have limited access, especially where human presence is impossible. The system is capable of detecting and measuring misalignments, gaps, inclinations as well as surface variations such as cracks and dents. The system employs the accuracy and speed of measurement of triangulation systems and combines these with the mobility and cost effectiveness of photogrammetry and edge detection techniques. In addition to gap and alignment offset inspections, the methodology and the instrument enables angle measurements, detailed surface texture examinations and other inspections needed to be done inside assemblies with narrow openings, with its compact body. Additionally, a comprehensive experimental study has been conducted to show that two different edge detection methods, namely, the “Simple Edge Tool” and “Straight Edge (Rake) Tool” can be used with great accuracy and precision for such measurement purposes. With this system, any surface, whether they have a reflectance or not, can be scrutinized.
APA, Harvard, Vancouver, ISO, and other styles
9

Moore, Travis J., and Matthew R. Jones. "A Method of Measuring the Temperature Profile of a Thermal Barrier Coating Using Inverse Radiative Heat Transfer Methods." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63808.

Full text
Abstract:
Ceramic thermal barrier coatings (TBCs) are used in power generation and aerospace turbines to protect superalloy components from large and extended heat loads. These coatings allow for increased inlet temperatures, thereby increasing efficiency and reducing air cooling requirements. Knowledge of the temperature profile in a thermal barrier coating is critical for evaluating the TBC performance and monitoring its health, as well as for accurate simulation and modeling. Non-contact, non-destructive techniques for finding these temperature profiles are highly desirable. Current techniques are limited in that they cannot measure the entire temperature profile of the TBC along with its radiative properties. An inverse radiative heat transfer method capable of determining the temperature profile, as well as the spectral absorption coefficient and spectral emittance at various wavenumbers, of a TBC using non-contact techniques was developed. A model of the measurements of the intensity exiting the TBC, which account for the emission from the substrate as well as the emission and absorption of the TBC itself, was developed. The TBC was approximated as a one-dimensional, plane-parallel, non-scattering medium. Optimization methods were used to determine the desired parameters by minimizing the error between actual intensity measurements and those calculated from the model. This method was tested for a number of simulated measurements with and without measurement error. Even with 10% measurement error introduced, the base temperature of the TBC was determined with only 0.45% error while the error in the TBC surface temperature measurement was 3.36% and that in the spectral emittance of the bondcoat was 12%. The error in the spectral absorption coefficient was significant.
APA, Harvard, Vancouver, ISO, and other styles
10

Ho, Bing-Lin, Jr-Rung Chen, Szu-Chi Kuan, Po-Er Hsu, Tsung-Han Hsieh, and Wen-Jen Chen. "Radius measurement and uncertainty evaluation using three-sphere reciprocity method." In 19th International Congress of Metrology (CIM2019), edited by Sandrine Gazal. Les Ulis, France: EDP Sciences, 2019. http://dx.doi.org/10.1051/metrology/201909006.

Full text
Abstract:
Three-dimensional (3D) measuring instrument has become widely applied by manufacturers due to the fast measurement capability and the flexible measuring procedure. It is also a crucial topic to evaluate or improve the measuring performance of these instruments, including the contact type like coordinate measuring machines (CMM) or the non-contact type like structure light scanners. Recently, the most commonly used standard feature is a sphere with a non-specular surface. It is because the ceramic materials is used to ensure the durability of the standard spheres, or is limited by the measuring principle of structure light scanners where the measured objects need to be lambertian surface. In the light of these limitations, the interferometry methods could not directly calibrate these standard spheres. In order to calibrate the radius and form of a non-specular sphere, this research focuses on the tactile method of spheres reciprocity method based on the previous researches. More details of the measuring principle and the formulas would be discussed. Final, the uncertainty of this method is evaluated using Monte Carlo method. The evaluated result of uncertainty is less than 10 nm for 15 mm radius sphere. This is very useful for common 3D measuring instrument calibration.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Non-contact measuring methods' for particular source types:
Journal articles
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!

To the bibliography