Temperature, humidity and wind speed integrated sensing system of fiber grating

Abstract

The invention discloses a temperature, humidity and wind speed integrated sensing system of a fiber grating. The system comprises a pump laser, a wavelength demodulator, a computer terminal, a wavelength division coupler, an optical fiber connector, a control line, a testing fiber 1 which is connected to a jump fiber in a testing environment, a testing fiber 2, and a temperature reference fiber. The three fibers comprise at least 13 testing points, the temperature, humidity and wind speed parameters of multiple points are obtained through measurement, wherein the two testing fibers and the temperature reference fiber are connected to three paths of measurement ports, the pump laser enters into the testing fiber 1 for measuring the wind speed parameter through the wavelength division coupler, and the pump laser is used for heating the high absorption loss fiber section connected to the testing fiber 1, which means that the a fiber hot wire is heated for wind speed measurement. According to the system, the synchronous high-precision measurement of the three parameters which are the environment temperature, the humidity and the wind speed can be realized.

Description

technical field [0001] The invention belongs to the technical field of optical fiber grating sensors, in particular to an integrated composite sensing system of optical fiber gratings. Background technique [0002] Sensing technology is the tentacles of information perception in the physical world. Fiber Bragg grating, as a new type of optical device, has the advantages of safety, strong anti-electromagnetic interference, and suitable for remote monitoring in data acquisition and monitoring. It has become one of the sensing technologies. An important branch of it, which is highly valued by researchers and industry. In recent years, the development of optical fiber sensors has shown a trend of miniaturization and multi-parameters. Fiber Bragg grating sensors for single-parameter measurement are currently widely used. There are also many studies on dual-composite parameter sensors in the academic circles, but they are mainly aimed at how to improve the measurement resolution ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fiber grating temperature, humidity and wind speed integrated composite sensor system, which solves the problem of synchronously and accurately measuring temperature, humidity and wind speed in the test environment (normal temperature, normal pressure)

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