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Inductive sensor

About: Inductive sensor is a research topic. Over the lifetime, 2282 publications have been published within this topic receiving 21984 citations.


Papers
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Proceedings ArticleDOI
07 Sep 2015
TL;DR: MagnifiSense, a low-power wearable system that uses three passive magneto-inductive sensors and a minimal ADC setup to identify the device a person is operating by analyzing near-field electromagnetic radiation from common components such as the motors, rectifiers, and modulators is presented.
Abstract: The different electronic devices we use on a daily basis produce distinct electromagnetic radiation due to differences in their underlying electrical components. We present MagnifiSense, a low-power wearable system that uses three passive magneto-inductive sensors and a minimal ADC setup to identify the device a person is operating. MagnifiSense achieves this by analyzing near-field electromagnetic radiation from common components such as the motors, rectifiers, and modulators. We conducted a staged, in-the-wild evaluation where an instrumented participant used a set of devices in a variety of settings in the home such as cooking and outdoors such as commuting in a vehicle. MagnifiSense achieves a classification accuracy of 82.6% using a model-agnostic classifier and 94.0% using a model-specific classifier. In a 24-hour naturalistic deployment, MagnifiSense correctly identified 25 of the total 29 events, while achieving a low false positive rate of 0.65% during 20.5 hours of non-activity.

40 citations

Proceedings ArticleDOI
12 May 2008
TL;DR: In this paper, the authors describe the design of an inductive sensor and its application to detect the presence of structural flaws inside electrically conducting nonmagnetic plates, based on the measurement of the induced voltages in two sensing coils.
Abstract: This paper describes the design of an inductive sensor and its application to detect the presence of structural flaws inside electrically conducting nonmagnetic plates. The principle of operation is based on the measurement of the induced voltages in two sensing coils. These voltages are related to the eddy currents that are generated inside the plates with perturbations due to the electrical conductivity inhomogeneities. The modeling work aims at determining the optimum operating frequencies and the resulting signal magnitudes.

40 citations

Patent
21 Dec 1989
TL;DR: A power line post insulator has a housing that encloses two inductive sensors that transversely straddle a recess which receives the power conductor Wires connect the sensors additively with respect to voltages induced by currents in the conductor between the sensors as discussed by the authors.
Abstract: A power line post insulator has a housing that encloses two inductive sensors that transversely straddle a recess which receives the power conductor Wires connect the sensors additively with respect to voltages induced by currents in the conductor between the sensors The sensors may each include one or two additively connected coils

40 citations

Journal ArticleDOI
TL;DR: In this article, a comprehensive experimental study of the non-destructive RF inductive testing technique, based on coupled spiral inductors, is presented, which can be applicable to the structural health monitoring of CFRP composite materials.

40 citations

Journal ArticleDOI
TL;DR: In this article, a planar spiral coil-based inductive displacement sensor is presented, which employs a fixed planar coil and a movable $U$ -shaped magnetic core.
Abstract: A new, non-contact, planar spiral coil-based inductive displacement sensor is presented in this paper. The proposed sensor employs a fixed planar coil and a movable $U$ -shaped magnetic core. The sensor is designed such a way that the shape of inductance versus displacement $x$ is sinusoidal. Due to this feature, the value of $x$ is obtained easily from the inductance measured without the need of a look-up table, which is not the case for most of the planar coil-based sensors. The proposed sensor has very low sensitivity to vertical misalignment of the core. A phase-sensitive detector-based measurement scheme is employed to measure the inductance. The inductance characteristic of the proposed sensor is symmetric with respect to the center of the coil. A simple capacitive detection scheme to distinguish the position of the core between the two halves of the coil is proposed in this paper. This method enables to extend the sensor range with multiple coils connected in series. A prototype of the proposed sensor has been developed and tested. The sensor has a worst case error of 0.6%. A modified sensor using two coil sets has been developed. The modified sensor has high sensitivity over its entire range, unlike the first prototype. It has a worst case error of 0.2% and a resolution of 6.5 $\mu \text{m}$ . The low-cost sensor developed will be useful for many industrial linear position sensing applications.

40 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202321
202242
202140
202082
201997
201871