Raman optical fiber temperature measuring device and temperature measuring method
A temperature measurement device, Raman fiber technology, applied in measurement devices, thermometers, heat measurement, etc., can solve the problems of low energy utilization rate of pulse signal laser, long temperature measurement time, increase measurement result error, etc. Effectiveness of energy utilization, shortening of measurement time, and reduction of error in measurement results
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[0023] The invention is a temperature measuring device for collecting Raman scattering at both ends of an optical fiber. The device can collect the Raman scattered light at both ends of the optical fiber, improve the energy utilization rate of the pulse signal laser, and can balance the signal intensity collected at both ends of the optical fiber. Furthermore, firing one laser pulse allows two sets of Raman scattering data to be collected for averaging, reducing measurement time.
[0024] like figure 1 As shown, the temperature measurement device includes a pulsed laser module 1 , a first data acquisition module 2 , a circulator 3 , a sensing fiber 4 , a fiber Bragg grating 5 (FBG), a second data acquisition module 6 and a data processing module 7 . The pulse laser module 1 is connected to the sensing fiber 4 through the circulator 3, the pulse signal laser emitted by the pulse laser module 1 is sent to the input end of the circulator 3, one of the output ends of the circulato...
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