Double-tail-fiber fiber bragg grating temperature sensor protection device

Abstract

The invention discloses a double-tail-fiber fiber bragg grating temperature sensor protection device. The double-tail-fiber fiber bragg grating temperature sensor protection device comprises an uppershell, a lower shell and a sensor body, wherein the upper shell and the lower shell are rotationally connected through a rotating shaft; and a handle is arranged at the joint of the upper shell and the lower shell, and the handle is provided with a handle lock. The protection shells of the sensor are in use, the design plays a protective role on the sensor body and prevents the negative effects ofwavelength drift, reflectivity drop and the like of a fiber bragg grating due to the action of external stress on the sensor during the work of the sensor body, at the same time, the sensor and connected optical cables are prevented from being damaged in the construction process, and the normal acquisition and transmission of signals can be ensured. According to the design of shock absorbing devices, the phenomenon of optical fiber damage caused by shaking of an upper box body shell and a lower box body shell in the installation process can be relieved. According to the design of rubber padsand a sponge layer, dust in the air can be prevented from entering the sensor and affecting a measurement result, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of protection devices, in particular to a protection device for a double-pigtail fiber grating temperature sensor. Background technique [0002] The optical fiber temperature sensor uses a polymer temperature-sensitive material that matches the refractive index of the optical fiber to coat the two optical fibers spliced ​​together, so that light energy is input from one optical fiber to the reflective surface and output from the other optical fiber. A new type of temperature-sensitive material is affected by temperature, and the refractive index changes, so the output optical power is a function of temperature. Its physical essence is to use the characteristic parameters of the light wave transmitted in the optical fiber, such as amplitude, phase, polarization state, wavelength and mode, etc., and it is sensitive to external environmental factors, such as temperature, pressure, radiation, etc. It belongs to...

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Problems solved by technology

[0003] Existing fiber optic temperature sensors are exposed to the outside during work. Due to external stress acting on the sensor, it will cause negative effects such as wavelength drift and reflectivity decrease of the fiber grating. Dust in the air will enter the sensor, which will reduce the service life of the sensor.

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