Compensation for Temperature Drift in Frequency-Modulated Continuous-Wave Interference Fiber Optic Pressure Sensor

Mengdi Nie; Gang Zheng; Xiongxing Zhang; Qiming Sheng; Yuan Guo; Lang Bai; Yuan Han

doi:10.3788/LOP202259.0728002

Laser & Optoelectronics Progress, Volume. 59, Issue 7, 0728002(2022)

Compensation for Temperature Drift in Frequency-Modulated Continuous-Wave Interference Fiber Optic Pressure Sensor

Mengdi Nie¹, Gang Zheng^1、*, Xiongxing Zhang¹, Qiming Sheng², Yuan Guo¹, Lang Bai¹, and Yuan Han²

Author Affiliations

¹School of Opto-Electronic Engineering, Xi'an Technological University, Xi'an , Shaanxi 710021, China

²School of Electronic Information Engineering, Xi'an Technological University, Xi'an , Shaanxi 710021, China

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Figures & Tables(16)

Fig. 1. Structure of the pressure sensing probe

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Fig. 2. Optical structure of the pressure sensor

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Fig. 3. Optical structure of the temperature compensation

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Fig. 4. Flow chart of the temperature compensation method

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Fig. 5. Principle of the experimental scheme

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Fig. 6. Pressure-cavity length variation curve of the pressure sensor during single measurement

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Fig. 7. Pressure-cavity length variation curve of pressure sensor during repeated measurement

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Fig. 8. Temperature-cavity length variation curve of the reference sensor

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Fig. 9. Temperature-cavity length variation curve of the pressure sensor

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Fig. 10. Measurement results before and after temperature compensation. (a) Cavity length variation in heating process; (b) temperature compensation accuracy in heating process; (c) cavity length variation in cooling process; (d) temperature compensation accuracy in cooling process

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Fig. 11. Stability test of temperature compensation structure

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Table 1. Measurement data and theoretical data during single measurement
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Table 1. Measurement data and theoretical data during single measurement
Pressure /kPa Measurement data /nm Theoretical data /nm
0 0 0
100 30119 29428
200 57485 58856
300 88100 88283
400 118090 117711
500 147730 147139

Table 2. Measurement data of pressure sensor during repeated measurement
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Table 2. Measurement data of pressure sensor during repeated measurement
Cavity length /nm
Pressure /kPa 1st time 2nd time 3rd time
0 0 0 0
100 29469 28460 30119
200 57833 56619 57485
300 86548 85626 88100
400 115169 114475 118090
500 143299 143195 143330

Table 3. Temperature measurement data of reference sensor and pressure sensor

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Table 3. Temperature measurement data of reference sensor and pressure sensor

Temperature /℃	Reference sensor displacement /nm	Temperature /℃	Pressure sensor displacement /nm
25.4	0	26.27	0
28.4	9445	30	5551
31.4	16651	33	10013
34.4	23493	36	15155
37.4	29863	39	20594
40.4	35662	42	26106
43.4	41211	45	33346
46.4	46704	/	/
49.4	52366	/	/

Table 4. Comparison of temperature compensation data in heating process

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Table 4. Comparison of temperature compensation data in heating process

Pressure /kPa	Uncompensated displacement /nm	Compensated displacement /nm	Reference displacement /nm
0	0	0	0
100	-28197	-29033	29428
200	-55010	-58916	58856
300	-81722	-86895	88283
400	-108201	-116754	117711
500	-134788	-146417	147139

Table 5. Comparison of temperature compensation data in cooling process

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Table 5. Comparison of temperature compensation data in cooling process

Pressure /kPa	Uncompensated displacement /nm	Compensated displacement /nm	Reference displacement /nm
0	0	0	0
100	-26351	-28859	29428
200	-54206	-57800	58856
300	-83728	-87067	88283
400	-112478	-117203	117711
500	-141903	-148146	147139

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Mengdi Nie, Gang Zheng, Xiongxing Zhang, Qiming Sheng, Yuan Guo, Lang Bai, Yuan Han. Compensation for Temperature Drift in Frequency-Modulated Continuous-Wave Interference Fiber Optic Pressure Sensor[J]. Laser & Optoelectronics Progress, 2022, 59(7): 0728002

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