Improving the measurement range of FFPI strain sensing using second-order control PDH technology

Yibo Zhang; Wei Jin; Ran An; Zhihai Liu; Yonggui Yuan; Jun Yang; Yuncai Wang; Yuwen Qin

doi:10.1364/OE.465742

Improving the measurement range of FFPI strain sensing using second-order control PDH technology

Yibo Zhang, Wei Jin, Ran An, Zhihai Liu, Yonggui Yuan, Jun Yang, Yuncai Wang, Yuwen Qin

Research output: Journal article publication › Journal article › Academic research › peer-review

2 Citations (Scopus)

Abstract

A novel demodulation method is presented to expand the measurement dynamic range for fiber optic strain sensors using PDH technology. The new control algorithm uses two integrators to form a 2^nd order control, and the FFPI strain sensor can have a dynamic range of 20 dB/octave larger than the PID control method when the input signal frequency decreases a magnitude. A strain resolution of 4.7 pε Hz⁻¹/²@10Hz, a 118 dB@10Hz dynamic range without consecution, and 158 dB with consecution is obtained. The experiment results show that the new control method can improve the sensing system’s dynamic range with the corner frequency unchanged and without the system noise level degradation.

Original language	English
Pages (from-to)	33886-33895
Number of pages	10
Journal	Optics Express
Volume	30
Issue number	19
DOIs	https://doi.org/10.1364/OE.465742
Publication status	Published - 12 Sept 2022
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.465742

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title = "Improving the measurement range of FFPI strain sensing using second-order control PDH technology",

abstract = "A novel demodulation method is presented to expand the measurement dynamic range for fiber optic strain sensors using PDH technology. The new control algorithm uses two integrators to form a 2nd order control, and the FFPI strain sensor can have a dynamic range of 20 dB/octave larger than the PID control method when the input signal frequency decreases a magnitude. A strain resolution of 4.7 pε Hz−1/2@10Hz, a 118 dB@10Hz dynamic range without consecution, and 158 dB with consecution is obtained. The experiment results show that the new control method can improve the sensing system{\textquoteright}s dynamic range with the corner frequency unchanged and without the system noise level degradation.",

author = "Yibo Zhang and Wei Jin and Ran An and Zhihai Liu and Yonggui Yuan and Jun Yang and Yuncai Wang and Yuwen Qin",

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T1 - Improving the measurement range of FFPI strain sensing using second-order control PDH technology

AU - Zhang, Yibo

AU - Jin, Wei

AU - An, Ran

AU - Liu, Zhihai

AU - Yuan, Yonggui

AU - Yang, Jun

AU - Wang, Yuncai

AU - Qin, Yuwen

PY - 2022/9/12

Y1 - 2022/9/12

N2 - A novel demodulation method is presented to expand the measurement dynamic range for fiber optic strain sensors using PDH technology. The new control algorithm uses two integrators to form a 2nd order control, and the FFPI strain sensor can have a dynamic range of 20 dB/octave larger than the PID control method when the input signal frequency decreases a magnitude. A strain resolution of 4.7 pε Hz−1/2@10Hz, a 118 dB@10Hz dynamic range without consecution, and 158 dB with consecution is obtained. The experiment results show that the new control method can improve the sensing system’s dynamic range with the corner frequency unchanged and without the system noise level degradation.

AB - A novel demodulation method is presented to expand the measurement dynamic range for fiber optic strain sensors using PDH technology. The new control algorithm uses two integrators to form a 2nd order control, and the FFPI strain sensor can have a dynamic range of 20 dB/octave larger than the PID control method when the input signal frequency decreases a magnitude. A strain resolution of 4.7 pε Hz−1/2@10Hz, a 118 dB@10Hz dynamic range without consecution, and 158 dB with consecution is obtained. The experiment results show that the new control method can improve the sensing system’s dynamic range with the corner frequency unchanged and without the system noise level degradation.

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Improving the measurement range of FFPI strain sensing using second-order control PDH technology

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