Design of Data Acquisition and Processing Module for Raman-Distributed Optical-Fiber Temperature Measurement System Based on FPGA

Yang Chen; Lijun Qiao; Kangyi Cao; Buwen Fan; Haosen Guo; Jiachen Qin; Jian Li; Mingjiang Zhang

doi:10.3788/LOP232513

Laser & Optoelectronics Progress, Volume. 61, Issue 17, 1706007(2024)

Design of Data Acquisition and Processing Module for Raman-Distributed Optical-Fiber Temperature Measurement System Based on FPGA

Yang Chen^1,3, Lijun Qiao^1,2、*, Kangyi Cao^1,3, Buwen Fan^1,3, Haosen Guo^1,3, Jiachen Qin^1,3, Jian Li^1,3, and Mingjiang Zhang^1,2、**

Author Affiliations

¹Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Shanxi Province, Taiyuan University of Technology,Taiyuan 030024, Shanxi, China

²College of Physics, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

³College of Electronic Information and Optical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

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Figures & Tables(15)

Fig. 1. Basic structure of Raman distributed optical fiber temperature measurement system

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Fig. 2. Structure design of data acquisition and processing module of Raman distributed optical fiber temperature measurement system based on FPGA

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Fig. 3. Schematic diagram of gain adjustment unit

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Fig. 4. Logical block diagram of FPGA receiving parallel LVDS high-speed differential signal

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Fig. 5. Cumulative average control unit state transition diagram

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Fig. 6. FPGA burst read and write DDR3 data transmission diagram

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Fig. 7. Gigabit ethernet interface logic block diagram

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Fig. 8. Computer client interface

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Fig. 9. Raman distributed optical fiber temperature measurement system physical diagram

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Fig. 10. Comparison of the effect of cumulative average denoising

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Fig. 11. Test results along the fiber at different temperatures

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Fig. 12. Result of the spatial resolution of the Raman distributed optical fiber temperature measurement system

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Fig. 13. Experimental result of measuring sensing distance by Raman distributed optical fiber temperature measurement system

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Table 1. SNR with different cumulative average times
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Table 1. SNR with different cumulative average times
Cumulative average times SNR /dB
1000 19.91
10000 36.37
100000 43.65

Table 2. Measurement error and relative error of temperature variation zone at different temperatures
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Table 2. Measurement error and relative error of temperature variation zone at different temperatures
Incubator nominal
temperature /℃
Temperature
measurement /℃
Measurement
error /℃
Relative
error /%
50.02 50.23 0.21 0.42
60.02 60.03 0.01 0.02
70.05 70.07 0.02 0.03
79.96 80.04 0.08 0.10
90.01 90.07 0.06 0.07

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Yang Chen, Lijun Qiao, Kangyi Cao, Buwen Fan, Haosen Guo, Jiachen Qin, Jian Li, Mingjiang Zhang. Design of Data Acquisition and Processing Module for Raman-Distributed Optical-Fiber Temperature Measurement System Based on FPGA[J]. Laser & Optoelectronics Progress, 2024, 61(17): 1706007

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