Auer, Siegfried · NASA Technical Reports Server (NASA)
A radiant energy angle sensor is provided wherein the sensitive portion thereof comprises a pair of linear array detectors with each detector mounted normal to the other to provide X and Y channels and a pair of slits spaced from the pair of linear arrays with each of the slits positioned normal to its associated linear array. There is also provided electrical circuit means connected to the pair of linear array detectors and to separate X and Y axes outputs.
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chudar · 2004
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Jakubík, Tomáš · Brno University of Technology Digital Library (Brno University of Technology) · 2010
This thesis deals with optical sensors used in computer mice and their possible use as a 2D plane positioning sensor system. The first part of the thesis explains the principles and differences in function of individual sensors, as well as a description of the methods used to determine to position of the sensor. The thesis also addresses the possibility of such a sensor connected to a PC using a device to determine the position of the sensor. In the next part of this work the option to build such a device with the use of microcontrollers is described, including a description of the functions of various parts of the device. Last part of the thesis deals with the control equipment and software processing of information by a computer.
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Jonathan W. Valvano · Defense Technical Information Center (DTIC) · 1975
A remote acoustic sensor, capable of reporting bearing information on targets it hears, may be deployed in the field without the knowledge of its exact location. This report develops an algorithm which calculates the sensor position through use of the bearing reports from a moving target whose location is known as a function of time. A math model along with FORTRAN listings and simulation runs are included. (Author)
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Timonen, Niklas · Theseus (Ammattikorkeakoulujen) · 2023
Tämän opinnäytetyön tarkoituksena oli löytää uusi anturiratkaisu kaivoslastauskoneen kauhan asennon tarkkailemiseen. Työn toimeksiantajana toimi Sandvik Mining and Rock Solutions Oy. \n \nTyön teoriaosuudessa käydään läpi hydrauliikan perusteita, sekä anturitekniikkaa ja erilaisia anturityyppejä. Pääpaino on antureissa. Varsinaisessa työssä käydään läpi teoriaosuudessa mainittuja antureita ja pohditaan niiden soveltuvuutta, sekä hyviä ja huonoja puolia lastauskoneen kauhan asennon tarkkailemisessa. \n \nTyön tuloksena päädyttiin induktiiviseen lineaarianturiin, jonka toiminta täytyy vielä todentaa prototyyppiasennuksella ennen kuin anturia voidaan harkita käytettävän tämänhetkisen ratkaisun sijaan.
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machine man · 2014
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K. Matsuda, Thomas H. Barnes, B. F. Oreb et al. · Optics Communications · 1999
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FERRARI, Paolo, FLAMMINI, Alessandra, MARIOLI, Daniele et al. · Institutional Research Information System (Università degli Studi di Brescia) · 2005
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Wenyu Li (455531), Zhizeng Luo (17599142), Wenguo Li (16816971) et al. · Figshare · 2023
<p>(a) Two muscle groups (ECR, FDS) at the front of hand side. (b) Two muscle groups (EPB, ED) at the back of hand side.</p>
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Youngquist, Robert C., Simmons, Stephen M. · NASA STI Repository (National Aeronautics and Space Administration)
An inductive position sensor uses three independent inductors inductively coupled by a common medium such as air. First and second inductors are separated by a fixed distance with the first inductor's axial core and second inductor's axial core maintained parallel to one another. A third inductor is disposed between the first and second inductors with the third inductor's axial core being maintained parallel to those of the first and second inductors. The combination of the first and second inductors are configured for relative movement with the third inductor's axial core remaining parallel to those of the first and second inductors as distance changes from the third inductor to each of the first inductor and second inductor. An oscillating current can be supplied to at least one of the three inductors, while voltage induced in at least one of the three inductors not supplied with the oscillating current is measured.
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Kořistka, Petr · Brno University of Technology Digital Library (Brno University of Technology) · 2010
Bachelor thesis deals with desing and construction of the inductive sensor. It shortly describes the history, advantages and disadvantages. Next there is developed principle of basic sensors working on the basis changes of inductivity and qualities of scanned materials. Major part of work was desing of individual parts of sensor essential to its correct function. It includes oscillator, rectifier, PI regulator, supply of tension and evaluation circuits. In the practical part was suggested PCB for individual parts of sensor. Measurement and processing of results were done.
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Igor Friedland, Ioseph Gurwich, M. Velger · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2006
The simple and very popular linear position sensor comprises LED (or laser diode) as light source, rectangular photodiode and cover fixed on mechanical moving part which position is measured. Position of the cover defines the light energy that reaches the photodiode surface. The energy is transformed in sensor output voltage proportional to cover displacement by condition that photodiode illumination is absolutely uniform. In practice the linear sensor is volume limited therefore the sensor illumination uniformity and sensor's scale factor accordingly are not constant values. Non-compensated variable sensor scale factor causes control system destabilization where sensor provides cover linear position measurement. This paper proposes the mathematical model which involves approximated characteristics of the LED irradiance intensity. We apply this approximation for calculating voltage versus displacement characteristic of linear sensor consisting of two overlapped photodiodes. Using this characteristic we provided its linearization and stability of control closed position system, where non-linear sensor was main destabilized factor.
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Volf, Lukáš · Brno University of Technology Digital Library (Brno University of Technology) · 2010
In the beginning is given an overview of sensors and their separation and properties. This work also deals deeper with inductive sensors. The work is designed for evaluation of the oscillator circuit (binary inductive sensor), its practical implementation, measuring the sensing range of different metals and measurement evaluation. For those interested, here is a list of literature.
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Simmons, Stephen M., Youngquist, Robert C. · NASA STI Repository (National Aeronautics and Space Administration)
An inductive position sensor uses three parallel inductors, each of which has an axial core that is an independent magnetic structure. A first support couples first and second inductors and separate them by a fixed distance. A second support coupled to a third inductor disposed between the first and second inductors. The first support and second support are configured for relative movement as distance changes from the third inductor to each of the first and second inductors. An oscillating current is supplied to the first and second inductors. A device measures a phase component of a source voltage generating the oscillating current and a phase component of voltage induced in the third inductor when the oscillating current is supplied to the first and second inductors such that the phase component of the voltage induced overlaps the phase component of the source voltage.
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Yoji Ku · 2015
This paper proposes a localizat position and azimuth of a lunar r method, the position is precisely e of an absolute and a relative p position is measured by observing and the relative position is det reckoning. Effectiveness is conf experiments and simulations. 1.
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Arne Küderle, Nils Roth, Jovana Zlatanovic et al. · Zenodo (CERN European Organization for Nuclear Research) · 2021
<pre> </pre> A dataset containing IMU recordings with full motion capture reference from 14 participants (approx. 10000 strides). Each participant was equipped with 15 synchronised IMUs (6 at different positions at each shoe, 1 at each ankle, and 1 and the lower back). The main goal of the dataset is to compare the recorded signals of the 6 sensors attached to each foot. For more information about the dataset check the `README.md` file in the dataset. If you are using the dataset, please cite the following paper: Küderle, Arne, Nils Roth, Jovana Zlatanovic, Markus Zrenner, Bjoern Eskofier, and Felix Kluge.<br> “The Placement of Foot-Mounted IMU Sensors Does Affect the Accuracy of Spatial Parameters during Regular Walking.”<br> PLOS ONE 17, no. 6 (June 9, 2022): e0269567. https://doi.org/10.1371/journal.pone.0269567.
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Jonathan D. Weiss · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 2023
A fluorescent optical position sensor and method of operation. A small excitation source side-pumps a localized region of fluorescence at an unknown position along a fluorescent waveguide. As the fluorescent light travels down the waveguide, the intensity of fluorescent light decreases due to absorption. By measuring with one (or two) photodetectors the attenuated intensity of fluorescent light emitted from one (or both) ends of the waveguide, the position of the excitation source relative to the waveguide can be determined by comparing the measured light intensity to a calibrated response curve or mathematical model. Alternatively, excitation light can be pumped into an end of the waveguide, which generates an exponentially-decaying continuous source of fluorescent light along the length of the waveguide. The position of a photodetector oriented to view the side of the waveguide can be uniquely determined by measuring the intensity of the fluorescent light emitted radially at that location.
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Ivan J. Garshelis, W. S. Fiegel · Journal of Applied Physics · 1988
A position sensor utilizing a slender ferromagnetic element, a small permanent magnet, and interactive conductors is described. The element, first uniformly magnetized by passage of the magnet over its entire length, is divided by subsequent motion of the magnet into two regions having opposite polarizations on each side of the magnet position. The regions are differentiated by their unequal incremental permeabilities in small bias fields. The effective ac permeability of the element as a whole is shown to be a linear function of magnet position. Data from an experimental sensor in which permeability was sensed by the inductance of an encircling solenoid confirm this linear transfer function. Utility as a measurement and control element in machinery, instruments, and liquid level devices is apparent from the achievable performance. Expected applications will be in the range from a few centimeters to a few meters.
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volvosenior · 2007
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B. Tilman · Measurement Techniques · 1990
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