Results 241 to 250 of about 365,761 (293)
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IEEE Transactions on Industry Applications, 1996
There are two types of low-cost velocity sensors based on magnetic principles, variable-reluctance sensors, and galvanomagnetic semiconductor (Hall effect or magnetoresistive) sensors. Variable-reluctance devices sense variations in flux linkage while semiconductors read variations in local flux density. The paper shows how recognizing this fundamental
B. Lequesne, A. Pawlak, T. Schroeder
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There are two types of low-cost velocity sensors based on magnetic principles, variable-reluctance sensors, and galvanomagnetic semiconductor (Hall effect or magnetoresistive) sensors. Variable-reluctance devices sense variations in flux linkage while semiconductors read variations in local flux density. The paper shows how recognizing this fundamental
B. Lequesne, A. Pawlak, T. Schroeder
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SPIE Proceedings, 2001
This paper begins with an overview of nanostructured magnetoelastic materials, namely the amorphous ferromagnetic alloys, detailing how the material structure gives rise to unique magnetic and physical properties suitable for sensor applications, such as a high magnetostriction coefficient, high magnetoelastic coupling, as well as low coercive force ...
Keat Ghee Ong +4 more
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This paper begins with an overview of nanostructured magnetoelastic materials, namely the amorphous ferromagnetic alloys, detailing how the material structure gives rise to unique magnetic and physical properties suitable for sensor applications, such as a high magnetostriction coefficient, high magnetoelastic coupling, as well as low coercive force ...
Keat Ghee Ong +4 more
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International Conference on Instrumentation, Communication, Information Technology, and Biomedical Engineering 2009, 2009
The paper explains design, development, and applications of a fluxgate magnetic sensor, which is based on second harmonic Fourier component. The sensor is used to measure an external magnetic DC or low-frequency AC field, Bext. The probe is driven periodically into saturation by a sinusoidal current that flows through the premagnetization coil.
Mitra Djamal, null Yulkifli
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The paper explains design, development, and applications of a fluxgate magnetic sensor, which is based on second harmonic Fourier component. The sensor is used to measure an external magnetic DC or low-frequency AC field, Bext. The probe is driven periodically into saturation by a sinusoidal current that flows through the premagnetization coil.
Mitra Djamal, null Yulkifli
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AIP Conference Proceedings, 1976
The sensor consists of a porous core of some magnetic material with an induction coil wrapped around it. Exposure of th core to oxidizing or reducing gases causes chemical changes to occur. These result in changes in the core’s magnetic properties which are observed as changes in the inductance of the coil.
Martin Rayl +2 more
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The sensor consists of a porous core of some magnetic material with an induction coil wrapped around it. Exposure of th core to oxidizing or reducing gases causes chemical changes to occur. These result in changes in the core’s magnetic properties which are observed as changes in the inductance of the coil.
Martin Rayl +2 more
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Sensors and Actuators A: Physical, 2003
Abstract Can magnetoresistors replace fluxgate sensors in precise applications such as navigation and detection of metal objects? Anisotropic Magnetoresistors (AMRs) and Giant Magnetoresistors (GMRs) can reach 10 nT resolution. It is possible to improve their stability by ac techniques, but the electronics becomes complex and consumes more power.
Michal Vopálenský +2 more
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Abstract Can magnetoresistors replace fluxgate sensors in precise applications such as navigation and detection of metal objects? Anisotropic Magnetoresistors (AMRs) and Giant Magnetoresistors (GMRs) can reach 10 nT resolution. It is possible to improve their stability by ac techniques, but the electronics becomes complex and consumes more power.
Michal Vopálenský +2 more
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The Physics Teacher, 2012
Earlier papers1–3 in this journal have described experiments on measuring the magnetic fields of current-carrying wires and permanent magnets using magnetic field probes of various kinds. This paper explains how to use an iPad and the free app MagnetMeter-3D Vector Magnetometer and Accelerometer4 (compass HD) to measure the magnetic fields.
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Earlier papers1–3 in this journal have described experiments on measuring the magnetic fields of current-carrying wires and permanent magnets using magnetic field probes of various kinds. This paper explains how to use an iPad and the free app MagnetMeter-3D Vector Magnetometer and Accelerometer4 (compass HD) to measure the magnetic fields.
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Review of Scientific Instruments, 1965
A device for measuring complex permeabilities, called a magnetic flux sensor, has been constructed from ferrite. Tests of the sensor which involve the imaginary part of the complex permeability are described in this paper. With a signal-to-null ratio of 2:1, the sensor can detect a change of resistance per unit resistance in metallic samples of 1.1×10 ...
Otto H. Zinke, Paul B. Jacovelli
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A device for measuring complex permeabilities, called a magnetic flux sensor, has been constructed from ferrite. Tests of the sensor which involve the imaginary part of the complex permeability are described in this paper. With a signal-to-null ratio of 2:1, the sensor can detect a change of resistance per unit resistance in metallic samples of 1.1×10 ...
Otto H. Zinke, Paul B. Jacovelli
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Physical Sensors: Magnetic Sensors
2023Marc Christopher Wurz, Maren S. Prediger
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Electric and Hybrid Vehicle Technology International, 2019
Position processors with in-built linearity compensation enable improvements in sensing system performance, vital to levels of precision required by modern automotive applications
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Position processors with in-built linearity compensation enable improvements in sensing system performance, vital to levels of precision required by modern automotive applications
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