Linear displacement sensor based on the magneto-optical Faraday effect

Villaverde, Antônio Balbin; Munin, Egberto; Pedroso, Carmen Beatriz

doi:10.1016/s0924-4247(98)00139-3

Cited by 11 publications

(4 citation statements)

References 24 publications

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“…In modern industrial production processes the actual linear or angular displacement of fast moving objects needs to be detected and ideally done with or without mechanical contact [1]. For this, there exist variety of suitable sensors that provide an output signal (voltage or current) proportional to the displacement of target and sensor.…”

Section: Introductionmentioning

confidence: 99%

Design and Development of a Linear Variable Differential Optical Sensor for Small Range Linear Displacement Measurement

Sarkar¹

2013

IJRET

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In this present paper, we have illustrated the development of a novel linear displacement sensor utilizing the intensity of light. This sensor is based on temporal changes in the intensity of diffuse light beam for the movement of a solid metallic obstacle between the source and detector instead of traditional reflector. An obstacle is moved over open surface of a hollow shaped channel, where light beams impinged vertically into the channel. Two photo detectors has been used to sense the variation of diffuse light intensity at the covered & uncovered area of channel surface due to the movement of obstacle over its open surface. This movement of an obstacle represents the actual target displacement by differentiating the output transformation of two photo detectors; this phenomenon is reported as linear variable differential optical sensor (LVDOS). The measured displacement recorded interns of voltage by the signal processing circuit (SPC). Experimental results are shown a satisfactory performance of the sensor for small range displacement measurement.

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Section: Introductionmentioning

confidence: 99%

Design and Development of a Linear Variable Differential Optical Sensor for Small Range Linear Displacement Measurement

Sarkar¹

2013

IJRET

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“…The Faraday-e¤ect based sensors (FES) uses the Faraday rotation of the plane of polarized light travelling through a magnetic material. Numerous works are devoted to the development of FES for magnetic …eld and current measurements [1][2][3][4][5][6][7]. There exist two main types of such FESs: all-…ber sensors, in which a …ber serves as a transmitting medium and a sensitive element [8][9][10], and sensors with bulk sensitive elements, in which an optical …ber is used for signal transmission and a material with magneto-optic properties serves as a sensitive element [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Accurate ellipsometric magnetic-field sensor used to align the watt balance magnetic circuit of the French National Metrology Institute

Ouedraogo

Topsu

Gayhmouni

et al. 2012

Sensors and Actuators A: Physical

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“…[ 6 - 12 ]. In 1998, a linear displacement sensor based on Faraday optical rotation was presented by Villaverde [ 13 ]. In the same year, Li [ 14 ] proposed a novel displacement sensor with wide range based on polarized light detecting technology.…”

Section: Introductionmentioning

confidence: 99%

Novel Absolute Displacement Sensor with Wide Range Based on Malus Law

Lü

Lin

2009

Sensors

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The paper presents a novel wide range absolute displacement sensor based on polarized light detection principle. The sensor comprises of two sets of polarized light detecting systems which are coupled by pulleys. The inherent disadvantage in optic system like light source intensity drift is solved and absolute measurement with wide-range is achieved. A prototype and the relevant test bed have been built. The test results are in good agreement with expectation. Its measurement range is 540 mm, and its linearity is better than 0.05%.

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Linear displacement sensor based on the magneto-optical Faraday effect

Cited by 11 publications

References 24 publications

Design and Development of a Linear Variable Differential Optical Sensor for Small Range Linear Displacement Measurement

Design and Development of a Linear Variable Differential Optical Sensor for Small Range Linear Displacement Measurement

Accurate ellipsometric magnetic-field sensor used to align the watt balance magnetic circuit of the French National Metrology Institute

Novel Absolute Displacement Sensor with Wide Range Based on Malus Law

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