Temperature self-compensated fiber grating tension sensor

Abstract

The invention relates to a temperature self-compensated fiber grating tension sensor comprising a base, wherein a cantilever is arranged on a cantilever mounting station of an inner cavity of the base through a fixed briquetting; a wire rope mounting hole is arranged at a position symmetric with the top end of the cantilever; a bearing is fixed through a cross shaft in the inner cavity of the base below a free end of the cantilever; a wire rope rounds the bearing from the wire rope mounting hole and is fixed at one end of a spring; the other end of the spring is fixed on an extension rod which is arranged in a sleeve of the extension rod; the external thread end of the extension rod is stretched out of the base; an optical fiber etched with a first fiber grating and a second fiber grating is arranged through an entrance of the optical fiber, the cantilever and an exit of the optical fiber; and the first fiber grating and the second fiber grating are arranged along the symmetric positions on the cantilever closely. The temperature self-compensating fiber grating tension sensor can realize a comprehensive test of tension and pressure in a static state and a dynamic state, in the meantime can resist electromagnetic interference and has a temperature self-compensating function.

Description

Technical field [0001] The invention relates to engineering measuring tools, in particular to a temperature self-compensated fiber grating tension sensor. Background technique [0002] At present, various force sensors such as strain and piezoelectric are widely used in force measurement. Force measurement includes static force measurement and dynamic force measurement. Static force measurement mainly uses strain gauge sensors, which can monitor a certain static force value for a long time, but due to the limitations of strain gauge dynamic response, it is not suitable for use The piezoelectric force sensor has a high dynamic frequency response, so it is suitable for dynamic force measurement, but because the amount of charge cannot be stored for a long time, the piezoelectric sensor is not suitable for static force measurement. At the same time, the electronic sensor itself has the defects of poor anti-lightning performance, poor anti-electromagnetic interference performance, a...

AI Technical Summary

Problems solved by technology

Force measurement includes static force measurement and dynamic force measurement. Static force measurement mainly uses strain sensor, which can monitor a certain static force value for a long time, but due to the limitation of dynamic response of strain gauge, it is not suitable for use It is suitable for the measurement of dynamic force; the piezoelectric force sensor has a high dynamic frequency response, so it is suitable for the measurement of dynamic force, but because the charge cannot be stored for a long time, the piezoelectric sensor is not suitable for the measurement of static force

At the same time, due to the shortcomings of the electronic sensor itself, such as poor anti-lightning performance, poor anti-electromagnetic interference performance, and short measurement distance, it has caused problems of poor reliability, small measurement range, and low measurement accuracy.

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