Reusable fiber bragg grating displacement sensor with display function and measuring method

Abstract

The invention discloses a reusable fiber bragg grating displacement sensor with a display function and a measurement method. The sensor comprises a reel module, a sensor shell, and a strain beam fixedstructure, a gear rack transmission structure, a worm gear transmission structure, a worm transmission structure, a two-stage acceleration transmission structure and a mechanical digital display structure which are arranged in the sensor shell. According to the optical fiber displacement sensor, the reel modular design can achieve installation or replacement of a new reel module under the condition that the sensor main body is not disassembled on site, the tedious problem that existing equipment cannot be replaced or needs to be returned to a factory for treatment is solved, a large amount ofcost is saved, and the sensor is green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of measurement, in particular to a reusable optical fiber grating displacement sensor with built-in display and a measurement method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Traditional electronic displacement sensors used in coal mines generally adopt a gear meshing rack mechanical method and are equipped with an angle sensor. When a displacement occurs, the wire rope pulls the rack, the rack drives the gear, and the angle sensor is connected to the gear to output an electrical signal. The overall structure of this method is relatively simple, but there are shortcomings such as small measuring range, and the leakage of the rack is not easy to be protected and easily damaged; the steel pulley structure can realize large-range monitoring, but the angular displaceme...

AI Technical Summary

Problems solved by technology

The overall structure of this method is relatively simple, but there are shortcomings such as small measuring range, not easy to protect and damage the rack; the steel pulley structure can realize large-range monitoring, but the angular displacement sensor still uses electronic sensors, and power supply is still required on site. And the transmission distance is limited, and the ability to resist electrical interference is insufficient

[0004] Fiber Bragg grating sensors generally adopt a spring tensile strain beam structure, the sensor structure is simple, but the actual application of this structure is not easy to achieve a large range of monitoring; other fiber grating structures also have the disadvantages of complex overall structure, inconvenient on-site installation and inability to be reused

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