Relevant bibliographies by topics / Optical accelerometer

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Optical accelerometer'

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

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Journal articles on the topic "Optical accelerometer"

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Fink, Lawrence E. "Optical accelerometer." Journal of the Acoustical Society of America 81, no. 2 (February 1987): 582. http://dx.doi.org/10.1121/1.394856.

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Grissom, David. "Optical accelerometer." Journal of the Acoustical Society of America 84, no. 5 (November 1988): 1962. http://dx.doi.org/10.1121/1.397100.

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Carome, Edward F. "Optical fiber accelerometer." Journal of the Acoustical Society of America 87, no. 3 (March 1990): 1382. http://dx.doi.org/10.1121/1.399492.

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Xiao, Xiangpeng, Jinpeng Tao, Qingguo Song, Yuezhen Sun, Jiang Yang, and Zhijun Yan. "Sensitivity-Tunable Oscillator-Accelerometer Based on Optical Fiber Bragg Grating." Photonics 8, no. 6 (June 15, 2021): 223. http://dx.doi.org/10.3390/photonics8060223.

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We demonstrate a fiber Bragg grating (FBG)-based oscillator-accelerometer in which the acceleration sensitivity can be tuned by controlling the location of the mass oscillator. We theoretically and experimentally investigated the performance of the proposed accelerometer. Theoretical analysis showed that both the mass and location of the oscillator affect the sensitivity and resonant frequency of the accelerometer. To simplify the analysis, a nondimensional parameter, P, was introduced to tune the sensitivity of the FBG-based oscillator-accelerometer, which is related to the location of the mass oscillator. Numerical analysis showed that the accelerometer sensitivity is linearly proportional to the P parameter. In the experiment, six FBG-based oscillator-accelerometers with different P parameters (0.125, 0.25, 0.375, 0.5, 0.625, 0.75) were fabricated and tested. The experimental results agree very well with the numerical analysis, in which the sensitivity of the proposed accelerometer linearly increased with the increase in parameter P (7.6 pm/g, 15.8 pm/g, 19.3 pm/g, 25.4 pm/g, 30.6 pm/g, 35.7 pm/g). The resonance frequency is quadratically proportional to parameter P, and the resonance frequency reaches the minimum of 440 Hz when P is equal to 0.5. The proposed oscillator-accelerometer showed very good orthogonal vibration isolation.
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Llobera, A., V. Seidemann, J. A. Plaza, V. J. Cadarso, and S. Buttgenbach. "Integrated polymer optical accelerometer." IEEE Photonics Technology Letters 17, no. 6 (June 2005): 1262–64. http://dx.doi.org/10.1109/lpt.2005.846458.

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Abbaspour-Sani, E., Ruey-Shing Huang, and Chee Yee Kwok. "A novel optical accelerometer." IEEE Electron Device Letters 16, no. 5 (May 1995): 166–68. http://dx.doi.org/10.1109/55.382228.

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Dupont, O., and J. C. Legros. "The optical bidirectional accelerometer." Advances in Space Research 8, no. 12 (January 1988): 147–54. http://dx.doi.org/10.1016/0273-1177(88)90016-6.

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Dongshan Jiang, Dongshan Jiang, Faxiang Zhang Faxiang Zhang, Wentao Zhang Wentao Zhang, Feng Li Feng Li, and Fang Li Fang Li. "Robust 3-component optical fiber accelerometer for seismic monitoring." Chinese Optics Letters 11, no. 2 (2013): 020602–20605. http://dx.doi.org/10.3788/col201311.020602.

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Lieberman, Paul, John Czajkowski, and John Rchard. "Optical System for Measurement of Pyrotechnic Test Accelerations." Journal of the IEST 35, no. 6 (November 1, 1992): 25–39. http://dx.doi.org/10.17764/jiet.2.35.6.jt5tv5811217p704.

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This effort was directed at comparing the response of several different accelerometcr and amplifier combinations to the pyrotechnic pulse simulating the ordnance separation of stages of multistage missiles. These pyrotechnic events can contain peak accelerations in excess of 100,000 G and a frequency content exceeding 100,000 Hz. The main thrust of this work was to compare the several accelerometer systems with each other and with a very accurate laser Doppler displacement meter in order to establish the frequency bands and acceleration amplitudes where the accelerometer systems are in error. The comparisons were made in simple sinc-wave and low-acceleration amplitude environments, as well as in very severe pyroshock environments. An optical laser Doppler displacement meter (LDDM) was used to obtain the displacement velocity and acceleration histories, as well as the corresponding shock spectrum.
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Vallan, Alberto, Sabrina Grassini, and Guido Perrone. "Surface Treatments to Enhance the Sensitivity of Plastic Optical Fiber Based Accelerometers." Key Engineering Materials 543 (March 2013): 297–301. http://dx.doi.org/10.4028/www.scientific.net/kem.543.297.

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The paper presents an all-fiber accelerometer that uses plastic optical fibers and discusses the enhancement of its sensitivity through physical treatments on the polymer surface to modify the light propagation characteristics. Given the target of being low-cost and compact, the accelerometer exploits the variation of propagation loss induced by the deformations of a miniaturized cantilever on which the fiber is fixed. This simple setup, however, does not exhibit a sufficient sensitivity unless the fiber surface is properly treated in order to enhance the loss dependence with the cantilever bending. Two approaches are compared, namely plasma micro-and nanotexturing and laser localized ablations. Several prototypes of accelerometers have been fabricated using various types of plastic fibers and characterized using a vibration test facility. Preliminary results show that both techniques are effective and can produce similar results, although accelerometer made by laser localized ablation may be more suitable for industrial applications, like the monitoring of vibrations due to moving parts of machines.
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Dissertations / Theses on the topic "Optical accelerometer"

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Zeng, Yiyi. "Design of a MEMS-based optical accelerometer with large measurable range and high sensitivity." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/823.

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MEMS Accelerometers are broadly used in the area of vibration sensor. Their applications range from seismic disturbances, to automotive industry such as airbag systems, active suspension, and smart braking. Traditionally, the acceleration is detected electrically by measuring either capacitive variations or piezoelectric signals. Those approaches suffer from a number of drawbacks, such as low sensitivity due to low signal-to-noise ratio (SNR), small dynamic range, high temperature sensitivity, etc. In this thesis, a MEMS-based optical accelerometer is designed and analyzed. The device can be fabricated on a silicon-on-insulator (SOI) wafer, on which a double-leg single-mode optical rib waveguide is used to propagate 1.55μm laser beam. The device integrates the waveguide with a mechanical oscillator, and is able to detect in-plane vibrations of the oscillator by taking advantages of optical interference. According to the analysis, the maximum working range of the oscillator can be as large as 50μm and the acceleration sensitivity can be below 1μg/Hz¹/². Device fabrication and characterization are also carried out and described in the thesis. All necessary fabrication steps and details as well as characterization setups are given. Due to several fabrication challenges in UBC (e.g. malfunctioned equipment), a complete device has not been fabricated. More fabrication and characterizations are to be continued as future work.
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NOGUEIRA, MURILO MAGALHAES. "METROLOGICAL EVALUATION OF AN OPTICAL FIBER BRAGG GRATING ACCELEROMETER: APPLICATION IN OVERHEAD TRANSMISSION LINES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7908@1.

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Linhas de transmissão de energia são estruturas importantes em um sistema de energia elétrica. Devido à elevada energia transportada por essas redes, falhas em linhas de transmissão podem ter reflexos severos no fornecimento aos consumidores, não raro levando a apagões em áreas geograficamente extensas. Entre as possíveis origens de falhas está o rompimento dos cabos elétricos pela fadiga provocada pela vibração eólica. As grandes extensões territoriais percorridas pelas linhas de transmissão e a variedade de climas, relevos, vegetação e condições meteorológicas aos quais estão submetidas dificultam qualquer trabalho de previsão da ação do vento. A medição da vibração permite detectar de antemão a aproximação da falha, porém os instrumentos convencionais dependem de transdutores elétricos os quais, além de exigirem uma fonte de energia (normalmente não disponível junto a linhas de transmissão) para seu funcionamento, sofrem influência dos intensos campos elétricos e magnéticos existentes em torno dos cabos de energia. A imunidade das fibras ópticas a campos elétricos e magnéticos e a possibilidade de uso de sinal de entrada de baixa potência oferecem uma alternativa para a criação de instrumentos de medição usando a técnica das redes de Bragg. A presente dissertação contribui com o desenvolvimento de um acelerômetro biaxial a redes de Bragg para medição de vibração em cabos de linhas de transmissão de energia. Além dos aspectos teóricos e práticos envolvidos, são discutidos os resultados de ensaios de calibração de elevada exatidão e outros ensaios especiais que fundamentaram a avaliação metrológica e o estabelecemento da eficácia do referido instrumento.
Overhead transmission lines play an important role on electric systems. Due to the high energy carried through those networks, failures on overhead lines can bring severe constraints on consumers supply, occasionally taking the form of blackouts in large geographic regions. Among the reasons of such failures is the breaking of electric cables caused by the fatigue originated from cyclic bending due to aeolian vibration. The large areas covered by overhead lines and the variety of climate, relief, vegetation and meteorological conditions under which they have to operate make it difficult to foresee the impact of wind Vibration measurements would allow anticipating the failure but conventional instruments depend upon electric transducers which, besides demanding a local source of energy (usually unavailable near overhead lines), suffer the influence of the high electric and magnetic fields around the energized cables. Optical fibers immunity against environments subjected to electrical and magnetic fields and the possibility of using low energy input signals offer the alternative of creating measuring instruments using Bragg gratings technique. This Master dissertation contributes with the development of a fiber Bragg grating biaxial accelerometer for measuring the vibration of overhead transmission line cables. Besides the theoretical and practical aspects related to the subject, the results of high precision calibration tests are discussed, together with other special tests which set the basis of the metrological evaluation and the establishment of the efficacy of the instrument.
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Malki, Abdelrafik. "Capteurs de vibrations mécaniques et de pression à fibre optique." Châtenay-Malabry, Ecole centrale de Paris, 1993. http://www.theses.fr/1993ECAP0582.

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L'utilisation des C. F. O. Couvre de plus en plus d'importants domaines de mesures. Cette thèse reprend dans la première partie l'état de l'art des C. F. O. Nous avons, dans la partie expérimentale effectué des mesures sur un capteur de vibration à fibre optique par effet de speckle, et avons montré au cours des expériences de l'amélioration du rapport signal signal sur bruit, dans le cas d'un filtrage spatial entre deux fibres multimodes différentes. La modélisation et la mise au point d'un capteur de vibrations, de type accéléromètre à fibre optique, par modulation d'intensité, fondé sur le micro-usinage de silicium ont été réalisées, ainsi qu'un prototype. Nous avons montré la faisabilité technologique d'un tel capteur. Celui-ci peut-être intégré dans un réseau à multiplexage chromatique. Le travail a consité également en la mise au point des interfaces optoélectroniques. Enfin un capteur de pression par couplage entre deux fibres a fait l'objet d'une étude théorique, et des mesures expérimentales. Grâce à la fusion des deux fibres optiques, on a amélioré la reproductibilité et la robustesse du capteur. Ceci ouvre ainsi la voie sur un grand nombre d'applications dans le domaine des composants optiques, tels que les coupleurs variables.
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Coultate, John. "Optimal and robust design of a MEMS accelerometer." Thesis, University of Nottingham, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438643.

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Toumieux, Pascal. "Conception d’un système d’évaluation à distance de la dépense énergétique liée à une activité physique : Application à la supervision de la dépense énergétique de patients en post - AVC." Thesis, Limoges, 2015. http://www.theses.fr/2015LIMO0141/document.

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Ce mémoire décrit la conception d’un dispositif, communicant sans fil, estimant la dépense énergétique liée à une activité physique (DEAP) de patients présentant de faibles niveaux d’activité physique (post-AVC) dans un milieu sensible comme les hôpitaux en associant fiabilité et sécurité. La nécessité d’une nouvelle conception s’appuie sur les résultats d’études préalables et de tests des dispositifs commercialisés dans ce domaine basés sur des accéléromètres. Pour limiter l’impact des radiofréquences, nous utilisons une technologie optique sans fil avec un émetteur porté par le patient en mouvement (plateforme existante associée à un accéléromètre et un système d’émission par diode infrarouge) et des récepteurs fixés au plafond reliés via Ethernet à un ordinateur distant permettant l’analyse des données. La probabilité de coupure d’un lien mobile en optique sans fil par transmission diffuse a été établie théoriquement en considérant un débit faible et une haute qualité de service classique dans le domaine médical. La mesure du nombre de pertes de trame durant la communication a permis de valider les performances théoriques de la technologie optique sans fil et d’établir la fiabilité de ce type de transmission infrarouge en fonction du nombre de récepteurs. Le calcul de la DEAP a été effectué à partir d’un pré-étalonnage sur deux personnes en comparant les résultats obtenus avec ceux donnés par calorimétrie et ceux donnés par un dispositif commercial. Nous avons optimisé l’étalonnage en réalisant un protocole d’essais avec un échantillon de personnes plus vaste puis avec un échantillon de onze personnes post-AVC pour valider le prototype
This thesis describes the design of a wireless device, communicating and estimating the energy expenditure (EE) related to physical activity of patients with low levels of physical activity (post stroke) in a sensitive environment such as hospitals by combining reliability and safety. The necessity of a new device is based on the results of preliminary studies and tests of commercially available devices (for the same use) based on accelerometers. To limit the impact of radio frequencies, we use optical technology with a wireless transmitter worn by a mobile patient (existing platform combined with an accelerometer and a system of transmission with infrared diode) and receiver fixed on the ceiling and connected via Ethernet to a remote computer for data analysis. The outage probability of a mobile wireless diffuse optical transmission was theoretically established by considering a low speed and a high quality of service in the conventional medical area. Measuring the number of frame losses during communication validates the theoretical performance of the optical wireless technology and proves the reliability of this type of mobile infrared transmission according to the number of receivers. The calculation of the EE has been performed on a pre-calibration from two people by comparing the results with those given by calorimetry and those given by a commercial device. We optimized the calibration by performing a test protocol with a larger sample of people and with a sample of eleven stroke people to validate the prototype
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Grassham, Paul J. "The design and application of polymeric materials in a novel light modulated accelerometer." Thesis, Sheffield Hallam University, 1992. http://shura.shu.ac.uk/19712/.

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A novel accelerometer based on light modulation has been designed and a prototype device manufactured. The device utilises the change in refractive index brought about by stress induced by the applied vibration. A detailed mathematical analysis of several feasible sensing designs has been performed to aid the design process. A mathematical model has been developed to assess the performance characteristics of the light modulated accelerometer the results of which were also used as a design tool. The prototype accelerometer was tested, from 1 g to 50 g between frequencies of 25 Hz to 2000 Hz, on a vibration system under three modulation schemes. The acceleration response of the device was seen to be linear over the testing range whilst the frequency response dropped off initially and levelled off at approximately 1 kHz. An experimental accelerometer was also assembled on the vibration table so that various materials could easily be tested without having to undergo precise machining. The acceleration and frequency responses showed similar behaviour to those obtained with the prototype accelerometer. However, the actual response levels varied with each material. To aid in the development of the accelerometer the stress-optic and thermo-optic coefficients have been determined for a range of polymeric materials. The stress optic coefficient was determined for polycarbonate, polymethyl methacrylate, polvinyl chloride and araldite epoxy resin using a circular polariscope and two interferometer configurations up to the yield stress of the materials tested. Each material showed a constant coefficient over the testing range. The results obtained using each technique were in good agreement with each other and the limited literature data available. The thermal variation of refractive index was also determined for the same materials. The Abbe refractometer was used for the determination between 5 and 140°C using five wavelength sources and two interferometer configurations using a HeNe laser from -50°C to approximately 30° above the glass transition temperatures. The change in index was found to be linear over the temperature range tested. However, at the glass transition temperature a change in gradient was observed with each material. Two simple mathematical relationships were used to predict the thermo-optic coefficient. These gave values reasonably close to those obtained in experiment.
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Rogers, Al-Aakhir A. "Evanescent Wave Coupling Using Different Subwavelength Gratings for a MEMS Accelerometer." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3319.

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A novel technique of coupling near-field evanescent waves by means of variable period subwavelength gratings (1.2 ìm and 1.0 ìm), using a 1.55 ìm infrared semiconductor laser is presented for the use of an optical MEMS accelerometer. The subwavelength gratings were fabricated on both glass and silicon substrates respectively. Optical simulation of the subwavelength gratings was carried out to obtain the maximum coupling efficiency of the two subwavelength gratings; the grating thickness, grating width, and the grating separation were optimized. This was performed for both silicon and glass substrates. The simulations were used to determine the total system noise, including the noise generated from the germanium photodiode, sensitivity, and displacement detection resolution of the coupled subwavelength grating MEMS accelerometer. The coupled gratings were utilized as optical readout accelerometers. The spring/proof mass silicon accelerometer was fabricated using a four mask process, in which the structure was completed using two deep reactive ion etching (DRIE) processes. The designed serpentine spring styles determine the sensitivity of the accelerometer; when the springs are made longer or shorter, thicker or thinner, this directly attributes to the sensitivity of the device. To test function of the example of the devices, the accelerometer is placed on a platform, which permits displacement normal to the plane of the grating. The 1.550 ìm infrared laser is incident on the coupled subwavelength grating accelerometer device and the output intensity is measured using a geranium photodiode. As the platform is displaced, the grating separation between the two gratings changes and causes the output intensity to change. Using the coupled subwavelength grating simulations as a reference to the output intensity change with respect to gap, the mechanical and coupling sensitivity properties of as it relates to acceleration is presented.
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Lozi, Julien, Olivier Guyon, Nemanja Jovanovic, Garima Singh, Sean Goebel, Barnaby Norris, and Hirofumi Okita. "Characterizing and mitigating vibrations for SCExAO." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622020.

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The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument, under development for the Subaru Telescope, has currently the fastest on-sky wavefront control loop, with a pyramid wavefront sensor running at 3.5 kHz. But even at that speed, we are still limited by low-frequency vibrations. The current main limitation was found to be vibrations attributed mainly to the rotation of the telescope. Using the fast wavefront sensors, cameras and accelerometers, we managed to identify the origin of most of the vibrations degrading our performance. Low-frequency vibrations are coming from the telescope drive in azimuth and elevation, as well as the elevation encoders when the target is at transit. Other vibrations were found at higher frequency coming from the image rotator inside Subaru's adaptive optics facility AO188. Different approaches are being implemented to take care of these issues. The PID control of the image rotator has been tuned to reduce their high-frequency contribution. We are working with the telescope team to tune the motor drives and reduce the impact of the elevation encoder. A Linear Quadratic Gaussian controller (LQG, or Kalman filter) is also being implemented inside SCExAO to control these vibrations. These solutions will not only improve significantly SCExAOs performance, but will also help all the other instruments on the Subaru Telescope, especially the ones behind A0188. Ultimately, this study will also help the development of the TMT, as these two telescopes share very similar drives.
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Osswald, Gustav. "Vibration analysis for predictive maintenance of a rotary pump : Optimal accelerometer configuration based on vibration analysis for cavitation detection of a bi-winged positive displacement pump." Thesis, KTH, Mekatronik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259903.

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Predictive maintenance based on condition monitoring uses sensor and system data to prevent damage, in advance to a failure occurring, allowing for a service to be performed at an optimal position in time. Condition based predictive maintenance estimates time of system failure based on a priori information, which has shown to be much more cost effective than traditional maintenance methods. Typically, there are applications where either of the maintenance methods, reactive, preventative or predictive maintenance, prove most sufficient. The expensive downtime in industrial processes and systems has come to focus development of predictive maintenance which often is found to be the optimal solution in these settings. In order for a predictive maintenance algorithm to be developed, there has to be in depth knowledge about the system and big data to base the algorithm on. This project is aimed at analysis and condition monitoring of the AkzoNobel - intelliCURE separate spreader used in the lamella and beam industry. Specifically targeted at the detection of cavitation in the transportation pumps, which is a common destructive phenomenon occurring in pumps. Cavitation which is the formation and implosion of cavities in the liquid, produces excessive shock waves resulting in vibrations. Depending on severity, cavitation can, in time, lead to internal damage and cause leakage. The type and amount of cavitation in a system is dependent on the rotational operating speed, which results in lower amount of vibrations for slow speeds. Where low amount of vibrations presents challenges of measurability. In order to detect the low amount of vibrations before severe cavitation development the optimal solution of measurability must be applied. Therefore, the research investigates the optimal solution for cavitation detection in terms of accelerometer configuration based on sensor position and sensor type in relation to reliability. The results of the study found that the fault mode vibrations caused by cavitation were detectable at lower rotational speeds than what industry recommended as the limit for an implementation. Additionally, the position and sensor type results in different performance to detect cavitation at slow pump speeds. An optimal configuration was found for the specific use case of the rotary bi-winged positive displacement pump.
Prediktivt underhåll baserat på tillståndsövervakning använder sensorer och systemdata för att förhindra skador, innan fel uppstår, vilket möjliggör att schemalägga en service vid en optimal tidpunkt. Tillståndsbaserat prediktivt underhåll estimerar tidpunkten för när fel uppstår i system baserat på a-priori information, som har visats vara mycket mer kostnadseffektiv än traditionella underhållningsmetoder. Typiskt finns tillämpningar där vardera av underhållsmetoderna, reaktivt-, förebyggande- eller prediktivt underhåll kan vara bäst lämpade. De dyra driftstoppen inom industri har lett till fokus på utveckling av prediktiva underhållsmetoder som ofta är ansett som den optimala lösningen i dessa förhållanden. För att en prediktiv algoritm ska kunna utvecklas krävs djup kunskap om systemet och stor mängd data att basera en algoritm på. Projektet fokuserar på vibrationsanalys och tillståndsövervakning av maskinen AkzoNobel - intelliCURE strängspridare som används i lamell- och balkindustrin. Forskningen är specifikt inriktad mot att upptäcka kavitation i transportpumparna som används i applikationen, där kavitation är ett relativt vanligt förekommande destruktivt fenomen som uppstår i pumpar. Kavitation, som är formandet och implosion av håligheter i vätska, leder till chockvågor som resulterar i vibrationer. Beroende på intensitet av förekommande kavitation, så kan det i tid leda till interna skador och resultera i läckage. Typen och intensiteten av förekommande kavitation i systemet är beroende av rotationshastigheten, som leder till lägre vibrationsgrad för lägre hastigheter. Där låg vibrationsintensitet presenterar utmaningar i mätbarhet. För att detektera den låga graden av vibrationer innan allvarlig kavitation utvecklas måste en optimal lösning för mätbarhet användas. Därav undersöker denna forskning en optimal lösning för att upptäcka kavitation med hjälp av accelerometerkonfiguration baserat på sensorplacering och sensortyp samt hur det relaterar till pålitlighet. Resultatet från studien visar att mätbarheten av vibrationerna som uppstår vid lägre hastigheter är bättre än vad som rekommenderas som gräns för användandet av vibrationsanalys på industriella applikationer. Samt att positionen och typen av sensor resulterar i olika möjligheter att detektera kavitation vid låga pumphastigheter. En optimal lösning hittades för det specifika användningsområdet av en dubbelvingad vingrotorpump som studien applicerades på.
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Robertson, Robert Voorhies. "Highly Physical Solar Radiation Pressure Modeling During Penumbra Transitions." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/73537.

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Solar radiation pressure (SRP) is one of the major non-gravitational forces acting on spacecraft. Acceleration by radiation pressure depends on the radiation flux; on spacecraft shape, attitude, and mass; and on the optical properties of the spacecraft surfaces. Precise modeling of SRP is needed for dynamic satellite orbit determination, space mission design and control, and processing of data from space-based science instruments. During Earth penumbra transitions, sunlight is passing through Earth's lower atmosphere and, in the process, its path, intensity, spectral composition, and shape are significantly affected. This dissertation presents a new method for highly physical SRP modeling in Earth's penumbra called Solar radiation pressure with Oblateness and Lower Atmospheric Absorption, Refraction, and Scattering (SOLAARS). The fundamental geometry and approach mirrors past work, where the solar radiation field is modeled using a number of light rays, rather than treating the Sun as a single point source. This dissertation aims to clarify this approach, simplify its implementation, and model previously overlooked factors. The complex geometries involved in modeling penumbra solar radiation fields are described in a more intuitive and complete way to simplify implementation. Atmospheric effects due to solar radiation passing through the troposphere and stratosphere are modeled, and the results are tabulated to significantly reduce computational cost. SOLAARS includes new, more efficient and accurate approaches to modeling atmospheric effects which allow us to consider the spatial and temporal variability in lower atmospheric conditions. A new approach to modeling the influence of Earth's polar flattening draws on past work to provide a relatively simple but accurate method for this important effect. Previous penumbra SRP models tend to lie at two extremes of complexity and computational cost, and so the significant improvement in accuracy provided by the complex models has often been lost in the interest of convenience and efficiency. This dissertation presents a simple model which provides an accurate alternative to the full, high precision SOLAARS model with reduced complexity and computational cost. This simpler method is based on curve fitting to results of the full SOLAARS model and is called SOLAARS Curve Fit (SOLAARS-CF). Both the high precision SOLAARS model and the simpler SOLAARS-CF model are applied to the Gravity Recovery and Climate Experiment (GRACE) satellites. Modeling results are compared to the sub-nm/s^2 precision GRACE accelerometer data and the results of a traditional penumbra SRP model. These comparisons illustrate the improved accuracy of the SOLAARS and SOLAARS-CF models. A sensitivity analyses for the GRACE orbit illustrates the significance of various input parameters and features of the SOLAARS model on results. The SOLAARS-CF model is applied to a study of penumbra SRP and the Earth flyby anomaly. Beyond the value of its results to the scientific community, this study provides an application example where the computational efficiency of the simplified SOLAARS-CF model is necessary. The Earth flyby anomaly is an open question in orbit determination which has gone unsolved for over 20 years. This study quantifies the influence of penumbra SRP modeling errors on the observed anomalies from the Galileo, Cassini, and Rosetta Earth flybys. The results of this study prove that penumbra SRP is not an explanation for or significant contributor to the Earth flyby anomaly.
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Books on the topic "Optical accelerometer"

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Laserdioden-Beschleunigungsmesser. Kassel: Institut für Mess- und Automatisierungstechnik, Fachgebiet Messtechnik, Universität Kassel-Gesamthochschule, 1991.

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Book chapters on the topic "Optical accelerometer"

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Mehrang, Saeed, Julia Pietila, Johanna Tolonen, Elina Helander, Holly Jimison, Misha Pavel, and Ilkka Korhonen. "Human Activity Recognition Using A Single Optical Heart Rate Monitoring Wristband Equipped with Triaxial Accelerometer." In EMBEC & NBC 2017, 587–90. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5122-7_147.

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Tihon, Pierre, Nicolas Linze, Olivier Verlinden, and Marc Wuilpart. "Design of an Optical-Fiber Accelerometer Based on Polarization Variation Due to Crushing of the Fiber." In Springer Proceedings in Physics, 607–14. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2069-5_81.

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Wohlrab, D., M. Heß, A. Apitzsch, M. Langklotz, A. Schwarzenberger, S. Bilda, H. Schulz, G. Hirtz, and J. Mehner. "Hom-e-call - An enhanced fall detection system based on accelerometer and optical sensors applicable in domestic environment." In IFMBE Proceedings, 1461–64. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19387-8_356.

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Rasch, Andreas, Eberhard Handrich, Günter Spahlinger, Martin Hafen, Sven Voigt, and Michael Weingärtner. "Fiber-Optic Gyros and MEMS Accelerometers." In Springer Series in Optical Sciences, 275–88. New York, NY: Springer New York, 2004. http://dx.doi.org/10.1007/978-0-387-34725-7_16.

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Wiak, Slawomir, Andrzej Cader, Pawel Drzymala, and Henryk Welfle. "Virtual Modeling and Optimal Design of Intelligent Micro-accelerometers." In Lecture Notes in Computer Science, 942–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-24844-6_146.

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Guldimann, Benedikt, Philippe Dubois, Pierre-André Clerc, and Nico de Rooij. "Fiber Optic — MEMS Accelerometer with high mass displacement resolution." In Transducers ’01 Eurosensors XV, 438–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59497-7_104.

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Veggeberg, Kurt. "Fiber Optic Accelerometers and Sensors for Dynamic Measurements." In Special Topics in Structural Dynamics, Volume 6, 161–65. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-6546-1_16.

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Kwon, Soon Jung, Hae Sung Lee, and Soo Bong Shin. "Optimal Accelerometer Locations for Structural Health Monitoring Using Time-Domain System Identification." In Advanced Nondestructive Evaluation I, 273–77. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-412-x.273.

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Kim, Minho, Jaewon Jang, Sa-kwang Song, Ho-Youl Jung, Seon-Hee Park, and Soo-Jun Park. "ADL Monitoring System Using FSR Arrays and Optional 3-Axis Accelerometer." In Lecture Notes in Computer Science, 217–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02868-7_27.

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Gerges, A. S., T. P. Newson, and D. A. Jackson. "Extrinsic Dual-Wavelength Fibre-Optic Based Accelerometer with Common Mode Compensation." In Springer Proceedings in Physics, 207–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-75088-5_32.

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Conference papers on the topic "Optical accelerometer"

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Shindo, Yugo, Norihiro Tsuchida, Koji Dobashi, and Hiroshi Kamata. "Fiber-Optic Accelerometer." In Optical Fiber Sensors. Washington, D.C.: OSA, 1997. http://dx.doi.org/10.1364/ofs.1997.owc15.

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Chen, Caihe, Yali Qin, Yimo Zhang, and Yuming Cui. "Hybrid integrated optical accelerometer." In Photonics China '96, edited by Kim D. Bennett, Byoung Yoon Kim, and Yanbiao Liao. SPIE, 1996. http://dx.doi.org/10.1117/12.252201.

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Villatoro, J., O. Arrizabalaga, M. Diez, E. Arrospide, E. Antonio-Lopez, J. Zubia, A. Schülzgen, and R. Amezcua-Correa. "Simple Multi-core Optical Fiber Accelerometer." In Optical Sensors. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/sensors.2018.sew3e.4.

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Zandi, Kazem, Jing Zou, Brian Wong, Roman V. Kruzelecky, and Yves-Alain Peter. "VOA-based optical MEMS accelerometer." In Nanophotonics. IEEE, 2011. http://dx.doi.org/10.1109/omems.2011.6031059.

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Qi, Yonghong, Yuxing Duan, ziming Ren, minghui Zhao, zhuangde Jiang, and Xueyong Wei. "Stiffness adjustable optical MEMS accelerometer." In Advanced Sensor Systems and Applications X, edited by Gang-Ding Peng and Zuyuan He. SPIE, 2020. http://dx.doi.org/10.1117/12.2573644.

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Spammer, Stephanus J., Peter L. Fuhr, Yinian Zhu, and Anatoli A. Chtcherbakov. "Optical fiber Bragg grating accelerometer." In Optical Engineering for Sensing and Nanotechnology (ICOSN '99), edited by Ichirou Yamaguchi. SPIE, 1999. http://dx.doi.org/10.1117/12.347726.

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Lee, Seung-Jae, and Dong-Woo Cho. "Fabrication of a Micro-Opto-Mechanical Accelerometer Based on Intensity Modulation." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41239.

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Abstract:
Accelerometers are most frequently used to monitor machining states, and are therefore crucial for automated and unmanned plant operations. In such a harsh environment, micro-accelerometers based on optical methods can be effective. This paper presents a new type of micro-opto-mechanical accelerometer that was developed using a combination of new technologies, such as deep reactive ion etching (DRIE), micro-stereolithography, and intensity modulation. The advantages of intensity modulation include the simplicity of the detection principle and the lack of a requirement for a high-quality light source. This paper reports the design of two types of micro-accelerometer using the finite element method. Experiments showed that the fabricated micro-accelerometers had resonant frequencies of approximately 2 and 10 kHz, with suitable linear ranges and sensitivities. The developed micro-opto-mechanical accelerometers can thus be used for various practical purposes, including machining state monitoring in automated and unmanned plant operations.
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Wang, Zhaogang, Wentao Zhang, Wenzhu Huang, and Fang Li. "Fiber laser accelerometer-magnetometer." In 25th International Conference on Optical Fiber Sensors, edited by Youngjoo Chung, Wei Jin, Byoungho Lee, John Canning, Kentaro Nakamura, and Libo Yuan. SPIE, 2017. http://dx.doi.org/10.1117/12.2265357.

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Farah, John G. "Interferometric fiber optic accelerometer." In Optical Tools for Manufacturing and Advanced Automation, edited by Ramon P. DePaula. SPIE, 1994. http://dx.doi.org/10.1117/12.169946.

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Wang, Fuyin, Shuidong Xiong, Zhengzheng Shao, Qiong Yao, Qingkai Hou, Hong Luo, and Yongming Hu. "All-optical accelerometer based on micromachined silicon wafer." In Fiber Optic Sensing and Optical Communication, edited by Qunbi Zhuge, Jie Zhang, Songnian Fu, Ming Tang, and Tuan Guo. SPIE, 2018. http://dx.doi.org/10.1117/12.2505715.

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Reports on the topic "Optical accelerometer"

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Boyd, Martin M., Adam Black, Todd Gustavson, Thomas Loftus, Franklin Roller, Thang Tran, Artyom Vitouchkine, and Brenton C. Young. Single-Axis Atom-Optic Accelerometer for Army Ground Vehicles. Fort Belvoir, VA: Defense Technical Information Center, June 2012. http://dx.doi.org/10.21236/ada578663.

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