Patent ID: 11927491
Assignee: TAIYUAN UNIVERSITY OF TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A self-calibration detection device oriented to a fiber Raman temperature sensing system, the self-calibration detection device comprising a fiber Raman thermodetector, thermostatic baths, a multi-mode sensing fiber, and a multi-mode fiber reflector;
wherein the fiber Raman thermodetector includes a pulsed laser, a wavelength division multiplexer (WDM), two avalanche photodiodes (APDs), two low-noise amplifiers (LNAs), a data acquisition card, and a computer;
wherein an output end of the pulsed laser is connected to an input end of the WDM; two output ends of the WDM are respectively connected to input ends of a first APD and a second APD; an output end of the first APD is connected to an input end of a first LNA; an output end of the second APD is connected to an input end of a second LNA; output ends of the first LNA and the second LNA are connected with input ends of the data acquisition card; and an output end of the data acquisition card is connected to an input end of the computer;
wherein an input end of the multi-mode sensing fiber is connected to a common end of the WDM, wherein a middle part of the multi-mode sensing fiber is respectively wound with a first reference fiber ring and a second reference fiber ring, and a rear part is used as a sensing fiber to be tested; the first reference fiber ring is placed in a first temperature bath, and the second reference fiber ring is placed in a second temperature bath; and wherein an output end of the sensing fiber to be tested is connected to the multi-mode fiber reflector.