Готові списки джерел за темами / Contact sensor

Добірка наукової літератури з теми "Contact sensor"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Contact sensor"

1

Hardman, David, Thomas George Thuruthel, Antonia Georgopoulou, Frank Clemens, and Fumiya Iida. "3D Printable Soft Sensory Fiber Networks for Robust and Complex Tactile Sensing." Micromachines 13, no. 9 (September 17, 2022): 1540. http://dx.doi.org/10.3390/mi13091540.

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Анотація:
The human tactile system is composed of multi-functional mechanoreceptors distributed in an optimized manner. Having the ability to design and optimize multi-modal soft sensory systems can further enhance the capabilities of current soft robotic systems. This work presents a complete framework for the fabrication of soft sensory fiber networks for contact localization, using pellet-based 3D printing of piezoresistive elastomers to manufacture flexible sensory networks with precise and repeatable performances. Given a desirable soft sensor property, our methodology can design and fabricate optimized sensor morphologies without human intervention. Extensive simulation and experimental studies are performed on two printed networks, comparing a baseline network to one optimized via an existing information theory based approach. Machine learning is used for contact localization based on the sensor responses. The sensor responses match simulations with tunable performances and good localization accuracy, even in the presence of damage and nonlinear material properties. The potential of the networks to function as capacitive sensors is also demonstrated.
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Chowdhury, Azmal Huda, Borzooye Jafarizadeh, Nezih Pala, and Chunlei Wang. "Wearable Capacitive Pressure Sensor for Contact and Non-Contact Sensing and Pulse Waveform Monitoring." Molecules 27, no. 20 (October 13, 2022): 6872. http://dx.doi.org/10.3390/molecules27206872.

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Анотація:
Sensitive and flexible pressure sensors have invoked considerable interest for a broad range of applications in tactile sensing, physiological sensing, and flexible electronics. The barrier between high sensitivity and low fabrication cost needs to be addressed to commercialize such flexible pressure sensors. A low-cost sacrificial template-assisted method for the capacitive sensor has been reported herein, utilizing a porous Polydimethylsiloxane (PDMS) polymer and a multiwalled carbon nanotube (MWCNT) composite-based dielectric layer. The sensor shows high sensitivity of 2.42 kPa−1 along with a low limit of detection of 1.46 Pa. The high sensitivity originates from adding MWCNT to PDMS, increasing the composite polymer’s dielectric constant. Besides this, the pressure sensor shows excellent stability at a cyclic loading of 9000 cycles, proving its reliability for long-lasting application in tactile and physiological sensing. The high sensitivity of the sensor is suitable for the detection of small deformations such as pulse waveforms as well as tactile pressure sensing. In addition, the paper demonstrates a simultaneous contact and non-contact sensing capability suitable for dual sensing (pressure and proximity) with a single data readout system. The dual-mode sensing capability may open opportunities for realizing compact systems in robotics, gesture control, contactless applications, and many more. The practicality of the sensor was shown in applications such as tactile sensing, Morse code generator, proximity sensing, and pulse wave sensing.
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3

Arai, Yoshikazu, Atsushi Shibuya, Y. Yoshikawa, and Wei Gao. "Online Measurement of Micro-Aspheric Surface Profile with Compensation of Scanning Error." Key Engineering Materials 381-382 (June 2008): 175–78. http://dx.doi.org/10.4028/www.scientific.net/kem.381-382.175.

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A novel scanning probe measurement system has been developed to achieve precise profile measurements of micro-aspheric surfaces. The system consists of a scanning stage (a spindle and a linear slide) and a sensor unit. The sensor unit consists of a ring artifact, two capacitance sensors and a contact-mode displacement sensor. The two capacitance sensors scan the surface of the ring artifact to measure and compensate the error motions of the scanning stage while the contact-mode displacement sensor scans the surface of a micro-aspheric. In this paper, a new contact-mode displacement sensor that has a small contact force of less than 2.3 mN and a stable output has been developed. After investigating the fundamental performance of the contact-mode displacement sensor, the sensor has been applied to the micro-aspheric surface profile measurement system. The effectiveness of the measurement system has been verified by the measurement results.
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Xu, Shaoyi, Fangfang Xing, Ruilin Wang, Wei Li, Yuqiao Wang, and Xianghui Wang. "Vibration sensor for the health monitoring of the large rotating machinery: review and outlook." Sensor Review 38, no. 1 (January 15, 2018): 44–64. http://dx.doi.org/10.1108/sr-03-2017-0049.

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Анотація:
Purpose At present, one of the key equipment in pillar industries is a large rotating machinery. Conducting regular health monitoring is important for ensuring safe operation of the large rotating machinery. Because vibrations sensors play an important role in the workings of the rotating machinery, measuring its vibration signal is an important task in health monitoring. This paper aims to present these. Design/methodology/approach In this work, the contact vibration sensor and the non-contact vibration sensor have been discussed. These sensors consist of two types: the electric vibration sensor and the optical fiber vibration sensor. Their applications in the large rotating machinery for the purpose of health monitoring are summarized, and their advantages and disadvantages are also presented. Findings Compared with the electric vibration sensor, the optical fiber vibration sensor of large rotating machinery has unique advantages in health monitoring, such as provision of immunity against electromagnetic interference, requirement of less insulation and provision of long-distance signal transmission. Originality/value Both contact vibration sensor and non-contact vibration sensor have been discussed. Among them, the electric vibration sensor and the optical fiber vibration sensor are compared. Future research direction of the vibration sensors is presented.
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Enser, Herbert, Christina Offenzeller, Marcel Knoll, Wolfgang Hilber, and Bernhard Jakoby. "Capacitive Contact Sensor on an Elastic Polymer Sheet." Proceedings 2, no. 13 (December 13, 2018): 1515. http://dx.doi.org/10.3390/proceedings2131515.

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Анотація:
There is an increasing need for embedded sensors integrated into parts and mechanical components, which are often polymer based. We investigated a solution to print capacitive sensors onto elastic polymer sheets to monitor the physical contact with other adjacent components. The capacitive sensors are oriented in an array across the surface of said sheet to monitor the contact and the distance to a neighboring electrically conductive object. In the particularly investigated setup, the sheet is embedded between to metallic (aluminum) plates and the capacitance of the sensor is changed due to the compression of the dielectric material between the interdigital fingers constituting the sensor.
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6

Sequeira, Gerald Joy, Robert Lugner, Ulrich Jumar, and Thomas Brandmeier. "A validation sensor based on carbon-fiber-reinforced plastic for early activation of automotive occupant restraint systems." Journal of Sensors and Sensor Systems 8, no. 1 (January 10, 2019): 19–35. http://dx.doi.org/10.5194/jsss-8-19-2019.

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Abstract. In the automotive industry, sensors and sensor systems are one of the most important components in upcoming challenges like highly automated and autonomous driving. Forward-looking sensors (radar, lidar and cameras) have the technical capability to already provide important (pre-)crash information, such as the position of contact, relative crash velocity and overlap (width of contact) before the crash occurs. Future safety systems can improve crash mitigation with sophisticated vehicle safety strategies based on this information. One such strategy is an early activation of restraint systems compared with conventional passive safety systems. These integrated safety systems consist of a combination of predictive forward-looking sensors and occupant restraint systems (airbags, belt tensioners, etc.) to provide the best occupant safety in inevitable crash situations. The activation of the restraint systems is the most critical decision process and requires a very robust validation system to avoid false activation. Hence, the information provided by the forward-looking sensor needs to be highly reliable. A validation sensor is required to check the plausibility of crucial information from forward-looking sensors used in integrated safety systems for safe automated and autonomous driving. This work presents a CFRP-based (carbon-fiber-reinforced plastic) validation sensor working on the principle of change in electrical resistance when a contact occurs. This sensor detects the first contact, gives information on impact position (where the contact occurs) and provides information on the overlap. The aim is to activate the vehicle restraint systems at near T0 (time of first contact). Prototypes of the sensor were manufactured in house and manually and were evaluated. At first, the sensor and its working principle were tested with a pendulum apparatus. In the next stage, the sensor was tested in a real crash test. The comparison of the signals from the CFRP-based sensor with presently used crash sensors in the vehicle highlights its advantages. The crash event can be identified at 0.1 ms after the initial contact. The sensor also provides information on impact position at 1.2 ms and enables a validation of the overlap development. Finally, a possible algorithm for the vehicle safety system using forward-looking sensors with a validation sensor is described.
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Kikuchi, Shin, and Yoshio Koide. "Linear Image Sensors. High Speed, High Gradation Contact Type Linear Image Sensor BASIS Multi-Chip Contact Sensor." Journal of the Institute of Television Engineers of Japan 47, no. 9 (1993): 1177–82. http://dx.doi.org/10.3169/itej1978.47.1177.

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Meteier, Quentin, Michiel Kindt, Leonardo Angelini, Omar Abou Khaled, and Elena Mugellini. "Non-Intrusive Contact Respiratory Sensor for Vehicles." Sensors 22, no. 3 (January 24, 2022): 880. http://dx.doi.org/10.3390/s22030880.

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In this work, we propose a low-cost solution capable of collecting the driver’s respiratory signal in a robust and non-intrusive way by contact with the chest and abdomen. It consists of a microcontroller and two piezoelectric sensors with their respective 3D printed plastic housings attached to the seat belt. An iterative process was conducted to find the optimal shape of the sensor housing. The location of the sensors can be easily adapted by sliding them along the seat belt. A few participants took part in three test sessions in a driving simulator. They had to perform various activities: resting, deep breathing, manual driving, and a non-driving-related task during automated driving. The subjects’ breathing rates were calculated from raw data collected with a reference chest belt, each sensor alone, and the fusion of the two. Results indicate that respiratory rate could be assessed from a single sensor located on the chest with an average absolute error of 0.92 min−1 across all periods, dropping to 0.13 min−1 during deep breathing. Sensor fusion did not improve system performance. A 4-pole filter with a cutoff frequency of 1 Hz emerged as the best option to minimize the error during the different periods. The results suggest that such a system could be used to assess the driver’s breathing rate while performing various activities in a vehicle.
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9

Pospelov, Alexander P., Victor I. Belan, Dmytro O. Harbuz, Volodymyr L. Vakula, Lyudmila V. Kamarchuk, Yuliya V. Volkova, and Gennadii V. Kamarchuk. "Selective detection of complex gas mixtures using point contacts: concept, method and tools." Beilstein Journal of Nanotechnology 11 (October 28, 2020): 1631–43. http://dx.doi.org/10.3762/bjnano.11.146.

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Анотація:
Of all modern nanosensors using the principle of measuring variations in electric conductance, point-contact sensors stand out in having a number of original sensor properties not manifested by their analogues. The nontrivial nature of point-contact sensors is based on the unique properties of Yanson point contacts used as the sensing elements. The quantum properties of Yanson point contacts enable the solution of some of the problems that could not be solved using conventional sensors measuring conductance. In the present paper, we demonstrate this by showing the potential of quantum point-contact sensors to selectively detect components of a gas mixture in real time. To demonstrate the high efficiency of the proposed approach, we analyze the human breath, which is the most complex of the currently known natural gas mixtures with extremely low concentrations of its components. Point-contact sensors allow us to obtain a spectroscopic profile of the mixture. This profile contains information about the complete set of energy interactions occurring in the point contact/breath system when the breath constituents adsorb to and desorb from the surface of the point-contact conduction channel. With this information we can unambiguously characterize the analyzed system, since knowing the energy parameters is key to successfully identifying and modeling the physicochemical properties of various quantum objects. Using the point-contact spectroscopic profile of a complex gas mixture it is possible to get a functional dependence of the concentration of particular breath components on the amplitude of the sensor output signal. To demonstrate the feasibility of the proposed approach, we analyze the point-contact profiles from the breath of several patients and compare them with the concentrations of serotonin and cortisol in the body of each patient. The obtained results demonstrate that the proposed methodology allows one to get an effective calibration function for a non-invasive analysis of the level of serotonin and cortisol in the human body using the point-contact breath test. The present study indicates some necessary prerequisites for the design of fast detection methods using differential sensor analysis in real time, which can be implemented in various areas of science and technology, among which medicine is one of the most important.
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Zhang, Yingxuan, Feng Ju, Xiaoyong Wei, Dan Wang, and Yaoyao Wang. "A Piezoelectric Tactile Sensor for Tissue Stiffness Detection with Arbitrary Contact Angle." Sensors 20, no. 22 (November 18, 2020): 6607. http://dx.doi.org/10.3390/s20226607.

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Анотація:
In this paper, a piezoelectric tactile sensor for detecting tissue stiffness in robot-assisted minimally invasive surgery (RMIS) is proposed. It can detect the stiffness not only when the probe is normal to the tissue surface, but also when there is a contact angle between the probe and normal direction. It solves the problem that existing sensors can only detect in the normal direction to ensure accuracy when the degree of freedom (DOF) of surgical instruments is limited. The proposed senor can distinguish samples with different stiffness and recognize lump from normal tissue effectively when the contact angle varies within [0°, 45°]. These are achieved by establishing a new detection model and sensor optimization. It deduces the influence of contact angle on stiffness detection by sensor parameters design and optimization. The detection performance of the sensor is confirmed by simulation and experiment. Five samples with different stiffness (including lump and normal samples with close stiffness) are used. Through blind recognition test in simulation, the recognition rate is 100% when the contact angle is randomly selected within 30°, 94.1% within 45°, which is 38.7% higher than the unoptimized sensor. Through blind classification test and automatic k-means clustering in experiment, the correct rate is 92% when the contact angle is randomly selected within 45°. We can get the proposed sensor can easily recognize samples with different stiffness with high accuracy which has broad application prospects in the medical field.
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Дисертації з теми "Contact sensor"

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Narayanaswamy, Anand Subramanian. "A Non-Contact Sensor Interface for High-Temperature, MEMS Capacitive Sensors." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1275675071.

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Demas, Nickolas Peter. "A contact force sensor for medical jet injection." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101813.

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Анотація:
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 131-135).
Medical jet injection, in which a narrow fluid drug stream is propelled into the skin without a needle, was first conceived in the 1940s [1]. However, a major drawback of most injectors is the lack of controllability of jet parameters. Recent work at the BioInstrumentation Laboratory at MIT has resulted in a tunable, high-performance linear Lorentz-force jet injector which allows for careful control of many injection variables. The sensor presented in this thesis further improves the ability to quantify and control contact forces between the injection nozzle and tissue. This sensor uses a three-spoke flexure system with full-bridge strain gauge assemblies mounted on each flexural arm to measure both normal and lateral forces applied to the nozzle. The design, fabrication, calibration, and validation for the sensor are detailed along with results for preliminary tissue injections into ex vivo porcine tissue. These preliminary tests showed higher percent volume delivery to the tissue with an elevated normal force. Under normal forces of 4 to 8 N, the BioInstrumentation Lab's jet injector achieved percent volume delivery of 89.1 ± 5.1%, whereas with normal forces of 0 to 4 N, the percent volume delivery was 68.9 ± 12.7%.
by Nickolas Peter Demas.
S.M.
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3

Daivasagaya, Daisy. "CMOS contact and phase imaging of biochemical sensor microarray." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=117067.

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In this Thesis, we present two systems for gaseous oxygen (O2) sensing. First, we describe a compact luminescent sensor microsystem that is based on the direct integration of sensor elements with a polymeric optical filter and placed on a low power Complementary Metal-Oxide Semiconductor (CMOS) imager Integrated Circuit (IC). The second system is a hand-held scale phase fluorometric system. This system is based on a new single-chip integrated circuit that can perform the activities of sinusoidal signal generation using Direct Digital Synthesis and phase angle extraction of the detection luminescence signal from the sensor films using Discrete Fourier Transform. For O2 sensing, the sensors operate on the measurement of excited-state emission intensity of O2-sensitive luminophores tris(4,7-diphenyl-1,10- phenanthroline) ruthenium(II) ([Ru(dpp)3]2+) encapsulated in sol-gel derived xerogel thin-films. For the compact luminescent sensor microsystem, we incorporate a polymeric optical filter that is made with polydimethylsiloxane (PDMS) that is mixed with color die Sudan-II. The surface of the PDMS filter is molded to incorporate arrays of pyramidal microstructures that serve to focus the optical sensor signals on to the photodetectors. The xerogel sensor arrays are contact printed on top of the PDMS pyramidal lens-like microstructures. The CMOS imager uses a 32x32 (1024 elements) array of active pixel sensors and each pixel includes a high-gain phototransistor to convert the detected optical signals into electrical currents. Correlated double sampling circuit, pixel address, digital control and signal integration circuits are also implemented on-chip. The CMOS imager data is read out as a serial coded signal. The developed CMOS sensor microsystems provide a useful platform for the development of miniaturized, analytically reliable, and accurate optical chemical gaseous and aqueous sensors.
Dans cette thèse, nous présentons deux systèmes pour détecter l'oxygène gazeux (O2). Tout d'abord, nous décrivons un microsystème compact à senseur luminescent qui est basée sur l'intégration directe d'éléments de senseur avec un filtre optique polymère qui est placé sur un imageur circuits intégrés (CI) à faible énergie de type Complementary metal oxide semi-conductor (CMOS). Le second système est un système portatif qui permet de détecter la différence de phase fluorométrique. Ce système est basé sur un circuit intégré à puce unique qui permet de générer des signaux sinusoïdal en utilisant la synthèse directe de signaux digitaux et l'extraction de l'angle de phase du signal luminescent, provenant des films du senseur, en utilisant des transformées de Fourier discrète sur ce signal. Pour la détection du dioxygène, les senseurs mesure l'intensité d'émission des luminophores tris (4,7-diphényl-1, 10 - phénanthroline) ruthénium (II) ([Ru(dpp)3]2+) à l'état excité encapsulés dans des sol-gel provenant de micro film xérogel. Le microsystème compact à senseur luminescent comprend un filtre optique polymère à base de polydiméthylsiloxane (PDMS), qui est mélangée avec le colorant Soudan-II. La surface du filtre PDMS est moulée pour ainsi incorporer les réseaux de microstructures pyramidales qui servent à concentrer les signaux des senseurs optiques sur les photodétecteurs. Les réseaux de senseur à base de xérogel sont imprimés par contact sur le dessus des microstructures PDMS pyramidales qui agissant comme des lentilles. L'imageur CMOS utilise une matrice de 32x32 (1024 éléments) servant de pixels actifs et chaque un de ces pixels comporte un phototransistor à gain élevé pour convertir les signaux détectés optiques en courants électriques. La corrélation de circuit d'échantillonnage double, l'adresse de pixel, et les circuits de commande numérique d'intégration de signaux sont également résolue par la puce. Les données sont lues par l'imageur en tant que signaux codé en série. Les capteurs CMOS fournissent une plateforme utile pour le développement des systèmes miniaturisés pour l'analyse fiable et précis des composantes chimiques gazeuse et aqueuse par des moyens optiques.
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4

Parmar, Biren Jagadish. "Development Of Point-Contact Surface Acoustic Wave Based Sensor System." Thesis, Indian Institute of Science, 2006. http://hdl.handle.net/2005/279.

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Анотація:
Surface Acoustic Waves (SAW) fall under a special category of elastic waves that need a material medium to propagate. The energy of these waves is confined to a limited depth below the surface over which they propagate, and their amplitudes decay with increasing depth. As a consequence of their being a surface phenomenon, they are easily accessible for transduction. Due to this reason, a lot of research has been carried out in the area, which has resulted in two very popular applications of SAW - SAW devices and in Non-Destructive Testing and Evaluation. A major restriction of SAW devices is that the SAW need a piezoelectric medium for generation, propagation and reception. This thesis reports the attempt made to overcome this restriction and utilize the SAW on non-piezoelectric substrates for sensing capabilities. The velocity of the SAW is known to be dependent purely on the material properties, specifically the elastic constants and material density. This dependence is the motivation for the sensor system developed in the present work. Information on the survey of the methods suitable for the generation and reception of SAW on non-piezoelectric substrates has been included in the thesis. This is followed by the theoretical and practical details of the method chosen for the present work - the point source/point receiver method. Advantages of this method include a simple and inexpensive fabrication procedure, easy customizability and the absence of restrictions due to directivity of the SAW generated. The transducers consist of a conically shaped PZT element attached to a backing material. When the piezoelectric material on the transmitter side is electrically excited, they undergo mechanical oscillations. When coupled to the surface of a solid, the oscillations are transferred onto the solid, which then acts as a point source for SAW. At the receiver, placed at a distance from the source on the same side, the received mechanical oscillations are converted into an electrical signal as a consequence of the direct piezoelectric effect. The details of the fabrication and preliminary trials conducted on metallic as well as non-metallic samples are given. Various applications have been envisaged for this relatively simple sensor system. One of them is in the field of pressure sensing. Experiments have been carried out to employ the acoustoelastic property of a flexible diaphragm made of silicone rubber sheet to measure pressure. The diaphragm, when exposed to a pressure on one side, experiences a varying strain field on the surface. The velocity of SAW generated on the stressed surface varies in accordance with the applied stress, and the consequent strain field generated. To verify the acoustoelastic phenomenon in silicone rubber, SAW velocities have been measured in longitudinal and transverse directions with respect to that of the applied tensile strain. Similar measurements are carried out with a pressure variant inducing the strain. The non-invasive nature of this setup lends it to be used for in situ measurement of pressure. The second application is in the field of elastography. Traditional methods of diagnosis to detect the presence of sub-epidermal lesions, some tumors of the breast, liver and prostate, intensity of skin irritation etc have been mainly by palpation. The sensor system developed in this work enables to overcome the restrictive usage and occasional failure to detect minute abnormal symptoms. In vitro trials have been conducted on tissue phantoms made out of poly (vinyl alcohol) (PVA-C) samples of varying stiffnesses. The results obtained and a discussion on the same are presented.
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5

Ellis, Lisa Marie. "Oil monitoring with an optically stimulated contact potential difference sensor." Thesis, Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-07072004-125914/unrestricted/Ellis%5FLisa%5FM%5F200407%5Fmast.pdf.

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Анотація:
Thesis (M.S.)--Mechanical Engineering, Georgia Institute of Technology, 2005.
Jiri Janata, Committee Member ; Shreyes Melkote, Committee Member ; Steven Danyluk, Committee Chair. Includes bibliographical references.
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Imran, Muneeb. "Contact-Less High Speed Measurement over Ground with 61 GHz Radar Sensor." Master's thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-212611.

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Анотація:
Conventional FMCW radar principle was implemented on Symeo 61 GHz LPR®-1DHP-R radar sensor system. There were few limitations of the FMCW implementation which needed to be removed. First, target separation in multi target environment was not possible for objects at same distance. For example, there are two targets, one is moving and one is static. When the moving target approaches the static target and becomes parallel to static target, which means they are at the same distance. At this point, the system is unable to distinguish between two targets. Second, high resolution in velocity measurement was needed. To overcome these limitations Range Doppler Signal Processing was proposed. For the implementation of the Range Doppler algorithm, first of all proof of concept is needed. Simulations are performed using MATLAB to simulate Range Doppler algorithm using raw data from the sensor. After successful simulation, prototype is developed using python. This also provides the real time visualization of Range Doppler signal processing along with peak detection with distance and velocity measurements. With the Range Doppler implementation, separation between static and moving target becomes possible. Later the algorithm is implemented on Texas Instrument DSP in C considering the resource limitations of the target hardware. To validate the Range Doppler implementation and to determine the measurements accuracy, multiple test setups are created. Two main local testing environments have been setup, linear unit and turntable. The system is tested on these environments for different velocities and distances along with multiple targets and on different surfaces. Furthermore, the system is tested at an industrial site for detecting the fluid speed, which is also possible with the Range Doppler implementation.
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7

CASASSA, FEDERICO. "Testing procedures and acquisition systems for contact sensor¿based vocal monitoring devices." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2742525.

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8

McNeal, Cedric J. "Barrel wear reduction in rail guns : the effects of known and controlled rail spacing on low voltage electrical contact and the hard chrome plating of copper-tungsten rail and pure copper rails /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FMcNeal.pdf.

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Анотація:
Thesis (M.S. in Applied Physics)--Naval Postgraduate School, June 2003.
Thesis advisor(s): William B. Maier II, Richard Harkins. Includes bibliographical references (p. 45-46). Also available online.
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Park, Jaihun. "Investigation of a quasi-static wheel-ground contact sensor for off-road vehicles /." Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3008415.

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Tsiareshka, Siarhei G. "Vibrating CPD Chemical Degradation Oil Sensor." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11636.

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Анотація:
Oil analysis is a broad field comprised of hundreds of individual tests that provide meaningful benefit by assessing one or more properties of lubricants or machines. Many tests are performed on new types of oil during research and development. The lubricants chemical, physical, or lubricating properties are validated for quality control purposes and product performance classification. Much of the research in this area is devoted to the online oil degradation systems which allow getting a prompt response about the condition of lubricant. This thesis investigates the concept for monitoring oil degradation with a vibrating Kelvin probe technique. The Vibrating Kelvin probe method for measuring the work function of metals has been used since 1932. Among the applications of this technique are adsorption, corrosion, friction and other studies. A novel application of this method is proposed in this thesis. The vibrating Kelvin system was created with one static surface acting as a sampling surface and the other one electrically isolated. The interaction of the oil with one of the surfaces of a capacitor results in a signal which is synchronously measured. The oil molecules adsorb on the surface of one of the plates and form a space charge layer which changes the work function of that surface. Oil prepared by intentional oxidation was used to evaluate and to monitor the ability to see changes in oil.
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Книги з теми "Contact sensor"

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M, Spuckler Charles, and United States. National Aeronautics and Space Administration., eds. Non-contact heat flux measurement using a transparent sensor. [Washington, DC]: National Aeronautics and Space Administration, 1993.

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M, Spuckler Charles, and United States. National Aeronautics and Space Administration., eds. Non-contact heat flux measurement using a transparent sensor. [Washington, DC]: National Aeronautics and Space Administration, 1993.

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3

M, Spuckler Charles, and United States. National Aeronautics and Space Administration., eds. Non-contact heat flux measurement using a transparent sensor. [Washington, DC]: National Aeronautics and Space Administration, 1993.

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United States. National Aeronautics and Space Administration., ed. Contact sensor attachment to titanium metal composites: Final report for NASA grant NCC3-189 ... [Washington, DC: National Aeronautics and Space Administration, 1997.

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5

Rakels, Jan Henricus. An in-process, non-contact surface finish sensor for high quality components generated using diamond turning. [s.l.]: typescript, 1987.

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B, Montney Charles, and Gale Research Inc, eds. Senior citizen services.: How to find and contact 15,000 providers. Detroit, MI: Gale Research Inc., 1993.

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B, Montney Charles, Gedridge Jolen Marya, and Gale Research Inc, eds. Senior citizen services.: How to find and contact 15,000 providers. Detroit, MI: Gale Research Inc., 1993.

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Discovery mechanisms for the sensor web. Amsterdam: IOS Press, 2013.

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United States. National Aeronautics and Space Administration., ed. Potential new sensor for use with conventional gas carburizing: Under contract NAS3-27186. [Washington, DC: National Aeronautics and Space Administration, 1997.

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United States. National Aeronautics and Space Administration., ed. Potential new sensor for use with conventional gas carburizing: Under contract NAS3-27186. [Washington, DC: National Aeronautics and Space Administration, 1997.

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Частини книг з теми "Contact sensor"

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Raković, Mirko, Miroslav Beronja, Aleksandar Batinica, Milutin Nikolić, and Branislav Borovac. "3-Axis Contact Force Fingertip Sensor Based on Hall Effect Sensor." In Advances in Intelligent Systems and Computing, 88–95. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-49058-8_10.

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Fraire, Juan A., Pablo Madoery, and Jorge M. Finochietto. "Contact Plan Design for Predictable Disruption-tolerant Space Sensor Networks." In Wireless Sensor Systems for Extreme Environments, 123–50. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781119126492.ch7.

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Wallin, C., and L. Gustavsson. "Non-Contact Magnetostrictive Torque Sensor — Opportunities and Realisation." In Advanced Microsystems for Automotive Applications Yearbook 2002, 184–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-18213-6_22.

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Shimizu, Yuki. "Contact-Type Micro Thermal Sensor for Surface Defect Detection." In Precision Manufacturing, 1–21. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-10-4912-5_18-1.

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Shimizu, Yuki. "Contact-Type Micro Thermal Sensor for Surface Defect Detection." In Precision Manufacturing, 515–35. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-10-4938-5_18.

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Gupta, R. P., K. G. Bhonde, and H. R. Khandagale. "Testing and Calibration of Contact-Free Radar Type Discharge Sensor." In Water Science and Technology Library, 407–17. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-55125-8_35.

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Matuszak, Marcin, and Paweł Waszczuk. "Sensor Fusion Based Tool-Workpiece Contact Detection in Micro-Milling." In Advances in Intelligent Systems and Computing, 317–25. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-10990-9_29.

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Allen, B., C. Harris, and D. Lange. "An Inertially Referenced Non-contact Sensor for Ground Vibration Tests." In Advanced Aerospace Applications, Volume 1, 339–49. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9302-1_28.

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Le, Quang Dan, and Hee-Jun Kang. "Sensor-Less Contact Force Estimation in Physical Human-Robot Interaction." In Intelligent Computing Theories and Application, 233–44. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-84529-2_20.

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Nguyen, Quynh, and Bhaskar Krishnamachari. "A Study of Contact Durations for Vehicle to Vehicle Communications." In Proceedings of International Symposium on Sensor Networks, Systems and Security, 173–83. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75683-7_13.

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Тези доповідей конференцій з теми "Contact sensor"

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Petchartee, Somrak, and Gareth Monkman. "Contact Classification using Tactile Arrays." In 2007 3rd International Conference on Intelligent Sensors, Sensor Networks and Information. IEEE, 2007. http://dx.doi.org/10.1109/issnip.2007.4496848.

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Tsukamoto, T., M. Esashi, and S. Tanaka. "Low contact resistance micro thermal switch with carbon-nanotube-enhanced contactor." In TRANSDUCERS 2009 - 2009 International Solid-State Sensors, Actuators and Microsystems Conference. IEEE, 2009. http://dx.doi.org/10.1109/sensor.2009.5285797.

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Zhang, Yanping, Chenghong Wang, David Pujol, Johes Bater, Matthew Lentz, Ashwin Machanavajjhala, Kartik Nayak, Lavanya Vasudevan, and Jun Yang. "Poirot: private contact summary aggregation." In SenSys '20: The 18th ACM Conference on Embedded Networked Sensor Systems. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3384419.3430603.

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Ozgoren, Murat, Mustafa Sakar, and Adile Oniz. "Contact/non-contact sensor mesh for body temperature monitoring." In 2010 15th National Biomedical Engineering Meeting (BIYOMUT 2010). IEEE, 2010. http://dx.doi.org/10.1109/biyomut.2010.5479808.

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Truong, Thieu Q., Terrence G. Barnes, Xiaoqing Lu, George G. Adams, and Nicol E. McGruer. "Design, Analysis, Fabrication, and Testing of a MEMS Contact/Bending Sensor With Improved Dynamic Range." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0268.

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Abstract Contact/bending sensors have been designed, analyzed, fabricated, and tested. These sensors are to be mounted on flexible antennae in order to provide a sense of touch for ambulatory underwater robotic lobsters. These biomimetic vehicles are designed to mimic some of the behavior patterns of real lobsters and are being built in order to search for and destroy mines in the littoral zone [1]. Two contact/bending sensors have been developed — a “standard” sensor and a “stopper” sensor. The standard sensor and stopper sensor are cantilever beam type microswitches fabricated on a thin flexible substrate. These sensors were fabricated using the Northeastern University Metal Micromachining (NUMEM) process [2]. The purpose of the stopper sensor design is to increase the dynamic range and alleviate the sensitivity limitations that are inherent in the standard sensor design. Tests have shown the standard sensors close at a substrate radius of curvature that is 25% greater than the design values. Tests and SEM micrographs of the stopper sensors have shown that there are some processing issues which need to be addressed.
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Miyashita, K., T. Takahashi, and S. Kawamata. "Non-contact magnetic toroue sensor." In International Conference on Magnetics. IEEE, 1990. http://dx.doi.org/10.1109/intmag.1990.734293.

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Meydan, T., and B. M. F. Bushofa. "Non-contact amorphous speed sensor." In International Conference on Magnetics. IEEE, 1990. http://dx.doi.org/10.1109/intmag.1990.734300.

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Krejci, Petr, Vlach Radek, and Robert Grepl. "Sensor of contact force vector." In Mechatronics, 2007 IEEE International Conference on. IEEE, 2007. http://dx.doi.org/10.1109/icmech.2007.4280005.

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Fainberg, Michael E., and Pavel A. Skrylev. "Non-contact velocity sensor simulator." In SPIE Proceedings, edited by Alexander L. Stempkovsky and Victor A. Shilin. SPIE, 2005. http://dx.doi.org/10.1117/12.637936.

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Pankrashkina, Ksenia V. "Non-contact Human Proximity Sensor." In 2022 Conference of Russian Young Researchers in Electrical and Electronic Engineering (ElConRus). IEEE, 2022. http://dx.doi.org/10.1109/elconrus54750.2022.9755543.

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Звіти організацій з теми "Contact sensor"

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Werne, R. The Contact Stress Sensor _ Proposal to the FY2020 Technology Tech Mat Grants Program. Office of Scientific and Technical Information (OSTI), February 2020. http://dx.doi.org/10.2172/1598958.

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Yu, Chau-Chih, Jin-Yan Hsu, and Tsung-Hua Hsu. The Development of Non-Contact Torque and Angle Sensor for Intelligent Power Assist System. Warrendale, PA: SAE International, October 2013. http://dx.doi.org/10.4271/2013-32-9119.

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Boyle, J. P. Measurement of Net Ocean Surface Heat Flux During the ONR CBLAST Low Wind, Convective Regime Field Program Using a New Ocean Surface Contact Sensor. Fort Belvoir, VA: Defense Technical Information Center, September 2003. http://dx.doi.org/10.21236/ada630004.

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Alchanatis, Victor, Stephen W. Searcy, Moshe Meron, W. Lee, G. Y. Li, and A. Ben Porath. Prediction of Nitrogen Stress Using Reflectance Techniques. United States Department of Agriculture, November 2001. http://dx.doi.org/10.32747/2001.7580664.bard.

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Commercial agriculture has come under increasing pressure to reduce nitrogen fertilizer inputs in order to minimize potential nonpoint source pollution of ground and surface waters. This has resulted in increased interest in site specific fertilizer management. One way to solve pollution problems would be to determine crop nutrient needs in real time, using remote detection, and regulating fertilizer dispensed by an applicator. By detecting actual plant needs, only the additional nitrogen necessary to optimize production would be supplied. This research aimed to develop techniques for real time assessment of nitrogen status of corn using a mobile sensor with the potential to regulate nitrogen application based on data from that sensor. Specifically, the research first attempted to determine the system parameters necessary to optimize reflectance spectra of corn plants as a function of growth stage, chlorophyll and nitrogen status. In addition to that, an adaptable, multispectral sensor and the signal processing algorithm to provide real time, in-field assessment of corn nitrogen status was developed. Spectral characteristics of corn leaves reflectance were investigated in order to estimate the nitrogen status of the plants, using a commercial laboratory spectrometer. Statistical models relating leaf N and reflectance spectra were developed for both greenhouse and field plots. A basis was established for assessing nitrogen status using spectral reflectance from plant canopies. The combined effect of variety and N treatment was studied by measuring the reflectance of three varieties of different leaf characteristic color and five different N treatments. The variety effect on the reflectance at 552 nm was not significant (a = 0.01), while canonical discriminant analysis showed promising results for distinguishing different variety and N treatment, using spectral reflectance. Ambient illumination was found inappropriate for reliable, one-beam spectral reflectance measurement of the plants canopy due to the strong spectral lines of sunlight. Therefore, artificial light was consequently used. For in-field N status measurement, a dark chamber was constructed, to include the sensor, along with artificial illumination. Two different approaches were tested (i) use of spatially scattered artificial light, and (ii) use of collimated artificial light beam. It was found that the collimated beam along with a proper design of the sensor-beam geometry yielded the best results in terms of reducing the noise due to variable background, and maintaining the same distance from the sensor to the sample point of the canopy. A multispectral sensor assembly, based on a linear variable filter was designed, constructed and tested. The sensor assembly combined two sensors to cover the range of 400 to 1100 nm, a mounting frame, and a field data acquisition system. Using the mobile dark chamber and the developed sensor, as well as an off-the-shelf sensor, in- field nitrogen status of the plants canopy was measured. Statistical analysis of the acquired in-field data showed that the nitrogen status of the com leaves can be predicted with a SEP (Standard Error of Prediction) of 0.27%. The stage of maturity of the crop affected the relationship between the reflectance spectrum and the nitrogen status of the leaves. Specifically, the best prediction results were obtained when a separate model was used for each maturity stage. In-field assessment of the nitrogen status of corn leaves was successfully carried out by non contact measurement of the reflectance spectrum. This technology is now mature to be incorporated in field implements for on-line control of fertilizer application.
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Miles, R., T. Bond, and G. Meyer. Report on Non-Contact DC Electric Field Sensors. Office of Scientific and Technical Information (OSTI), June 2009. http://dx.doi.org/10.2172/971778.

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Brickner, Michael S., and Ayelet Oettinger. Content Validity Requirements for Simulated Sensor Imagery. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada387943.

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Brickner, Michael S., and Ayelet Oettinger. Content Validity Requirements for Simulated Sensor Imagery. Draft. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada388022.

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Swanson, Rand. A REAL TIME COAL CONTENT ORE GRADE (C2OG) SENSOR. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/791709.

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Swanson, Rand. A REAL TIME COAL CONTENT ORE GRADE (C2OG) SENSOR. Office of Scientific and Technical Information (OSTI), October 2002. http://dx.doi.org/10.2172/804933.

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Rand Swanson. A REAL TIME COAL CONTENT ORE GRADE (C2OG) SENSOR. Office of Scientific and Technical Information (OSTI), July 2004. http://dx.doi.org/10.2172/833479.

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