New structure for multipoint temperature-independent strain sensing system employing optical power detection scheme

Wang, S.M.; Chiang, Yi‐Hsuan; Wang, Likarn

doi:10.1016/j.yofte.2007.11.002

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…In the linear range of the grating, the wavelength shifts of the PS FBG and TC FBG with the changes in the temperature and pressure can be described as the following formulae [23,24]:…”

Section: Temperature Compensation Principlementioning

confidence: 99%

Temperature Compensation Fiber Bragg Grating Pressure Sensor Based on Plane Diaphragm

2018

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Pressure sensors are the essential equipments in the field of pressure measurement. In this work, we propose a temperature compensation fiber Bragg grating (FBG) pressure sensor based on the plane diaphragm. The plane diaphragm and pressure sensitivity FBG (PS FBG) are used as the pressure sensitive components, and the temperature compensation FBG (TC FBG) is used to improve the temperature cross-sensitivity. Mechanical deformation model and deformation characteristics simulation analysis of the diaphragm are presented. The measurement principle and theoretical analysis of the mathematical relationship between the FBG central wavelength shift and pressure of the sensor are introduced. The sensitivity and measure range can be adjusted by utilizing the different materials and sizes of the diaphragm to accommodate different measure environments. The performance experiments are carried out, and the results indicate that the pressure sensitivity of the sensor is 35.7 pm/MPa in a range from 0 MPa to 50 MPa and has good linearity with a linear fitting correlation coefficient of 99.95%. In addition, the sensor has the advantages of low frequency chirp and high stability, which can be used to measure pressure in mining engineering, civil engineering, or other complex environment.

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“…In the linear range of the grating, the wavelength shifts of the PS FBG and TC FBG with the changes in the temperature and pressure can be described as the following formulae [23,24]:…”

Section: Temperature Compensation Principlementioning

confidence: 99%

Temperature Compensation Fiber Bragg Grating Pressure Sensor Based on Plane Diaphragm

2018

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Real-time measurement of dynamic accelerations with optical-fiber accelerometer based on polarization analysis

et al. 2014

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This paper presents a novel technique for the measurement of accelerations using an optical-fiber accelerometer based on the analysis of polarization variations. The technique relies on the identification of six parameters of the fiber Mueller matrix through polarimetric measurements. We demonstrate by theoretical and experimental work that the sensitivity of the proposed method does not depend on the input polarization states sent into the fiber nor on the intrinsic fiber birefringence. The sensor has been successfully tested for acceleration amplitudes between 2.5 and 20 m/s² at a frequency of 120 Hz. The acceleration resolution increases from 0.1 m/s² around an acceleration of 2.5 m/s² to 0.35 m/s² around 20 m/s². The acceleration measurements can be performed every 160 μs.

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New structure for multipoint temperature-independent strain sensing system employing optical power detection scheme

Cited by 2 publications

References 15 publications

Temperature Compensation Fiber Bragg Grating Pressure Sensor Based on Plane Diaphragm

Temperature Compensation Fiber Bragg Grating Pressure Sensor Based on Plane Diaphragm

Real-time measurement of dynamic accelerations with optical-fiber accelerometer based on polarization analysis

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