Multiplexed displacement fiber sensor using thin core fiber exciter

Chen, Zhen; Hefferman, Gerald; Wei, Tao

doi:10.1063/1.4922019

Cited by 9 publications

(2 citation statements)

References 23 publications

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“…High-precision displacement measurement is of importance to machine vision [1], modern manufacturing [2], structural monitoring [3] and other industrial fields. Non-contact displacement sensors are widely applied in such processes [4][5][6], which avoids the disadvantages of contact sensors like friction and low life span [7].…”

Section: Introductionmentioning

confidence: 99%

Non-contact and high-precision displacement measurement based on tunnel magnetoresistance

Liu

Yang

2020

Meas. Sci. Technol.

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High-precision displacement measurement is essential to various industrial fields, but the drawbacks of existing sensors like bulkiness, low compatibility and high cost limit their applications. In this study, a non-contact and high-precision displacement measurement method based on tunnel magnetoresistance is introduced to achieve high accuracy and small size. The displacement of a permanent magnet changes the spatial distribution of the magnetic field and thus the output of the full-bridge tunnel magnetosresistance (TMR)-based component varies. Based on the theoretical analysis, the highest sensitivity of the measurement system is obtained and the corresponding layout of the permanent magnet and TMR component to ensure the system achieves such sensitivity is determined. The results are validated by experiments, and the highest sensitivity is 17.15 mV m−1. The system shows stable and high-quality frequency response below 300 Hz. The resolution reaches to 33 nm and the system is of high resolution compared with the eddy current sensor. The time drift is determined to be 0.121 m h−1, which is 30% lower than the existing laser sensor. All the features of the measurement system imply that it is of high accuracy and robustness. The compact structure and low cost make it a promising alternative to existing displacement sensors and demonstrates its potential for integration with the actuator.

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Section: Introductionmentioning

confidence: 99%

Non-contact and high-precision displacement measurement based on tunnel magnetoresistance

Liu

Yang

2020

Meas. Sci. Technol.

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“…There are intensive studies on optical sensing of strain, temperature, pressure, accelerometer, vibration, etc. [4][5][6][7] . For instance, a fiber optic Fabry-Perot interferometer (FFPI) fiber Bragg grating (FBG) sensor could be used to measure thermal property of a silica-based fiber [8] , while the Fabry-Perot (F-P) sensor could measure the reflective index and temperature simultaneously [9] , using the research on magnetic sensing based on fiber loop ringdown that has been done [10] .…”

mentioning

confidence: 99%

Temperature-insensitive optical Fabry–Perot flow measurement system with partial bend angle

et al. 2017

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A flow measurement system consisting of an optical fiber Fabry-Perot (F-P) sensor and an elbow tube is proposed and demonstrated to realize flow measurements and eliminate thermal disturbance. Two F-P sensors are symmetrically mounted on the inner-wall surface of the elbow of 90°in order to eliminate the effect of thermal disturbance to the flow measurement accuracy. Experimental results show that the absolute phase difference is the square root of the fluid flow. It is consistent with the theoretical analysis, which proves that the flow measurement method can measure flow and eliminate the influence of thermal disturbance simultaneously.

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An optical fiber Fabry-Perot flow measurement technology based on partial bend structure

Yang

Jiang

Zhang

et al. 2016

Review of Scientific Instruments

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An optical fiber Fabry-Perot (F-P) flow measurement technology is presented, which is based on partial bend structure. A 90° partial bend structure is designed to achieve the non-probe flow measurement with a pressure difference. The fluid simulation results of partial bend structure show that the error of the pressure difference is below 0.05 kPa during steady flow. The optical fiber F-P sensor mounted on the elbow with pressure test accuracy of 1% full scale is used to measure the fluid flow. Flow test results show that when the flow varies from 1 m(3)/h to 6.5 m(3)/h at ambient temperature of 25 °C, the response time is 1 s and the flow test accuracy is 4.5% of the F-P flow test system, proving that the F-P flow test method based on partial bend structure can be used in fluid flow measurement.

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Multiplexed displacement fiber sensor using thin core fiber exciter

Cited by 9 publications

References 23 publications

Non-contact and high-precision displacement measurement based on tunnel magnetoresistance

Non-contact and high-precision displacement measurement based on tunnel magnetoresistance

Temperature-insensitive optical Fabry–Perot flow measurement system with partial bend angle

An optical fiber Fabry-Perot flow measurement technology based on partial bend structure

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