Research on Multi-point Temperature Field Measurement System for Fiber Bragg Grating Measurement Environment
WEI Jin-he1, CUI Jian-jun2, ZHANG Fu-min1, CHEN Kai2, WANG Dong1
1.College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
2.National Institute of Metrology, Beijing 100029, China
Abstract In order to accurately measure the ambient temperature value, control the ambient temperature field to be stable and uniform, and improve the test accuracy of the fiber grating strain sensor, the standard platinum resistance and multi-channel excellent thermocouple were designed in the performance test of fiber grating strain sensor and the calibration of key parameters. To realize the multi-point temperature field measurement method, the thermocouple calibration experiment and the system measurement uncertainty analysis in the temperature range of 3 °C at 20 °C were carried out, the actual measurement uncertainty of the whole system was within 5mK, which can meet the testing needs of fiber grating strain sensors.
WEI Jin-he,CUI Jian-jun,ZHANG Fu-min, et al. Research on Multi-point Temperature Field Measurement System for Fiber Bragg Grating Measurement Environment[J]. Acta Metrologica Sinica, 2019, 40(6A): 42-46.
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2019, Vol. 40 
