Fiber grating displacement sensor with temperature measuring function for marine engineering

Abstract

The present invention discloses a fiber grating displacement sensor with a temperature measuring function for marine engineering. The sensor comprises a shell which is internally provided with two guide rails which are parallel to a longitudinal center line. The two guide rails are equipped with a slope sliding block. A contact which is matched with the slope surface of the slope sliding block is arranged on the slope surface. The contact is fixed at the front end of a constant strength beam which is parallel to the guide rails, and the back end of the constant strength beam is fixed in the shell. The lower surface of the constant strength beam is equipped with a fiber grating strain sensor. The shell is internally provided with a fiber grating temperature sensor which is connected to the fiber grating strain sensor by using a fiber. Two ends of the fiber are provided with provided with fiber joints. The front end of the slope sliding block is fixedly connected to a connection rod. According to the fiber grating displacement sensor, the synchronous measurement of temperature and displacement can be realized, the stability of a measurement signal is reliable, the long distance transmission of the measurement signal can be realized, and the fiber grating displacement sensor can be applied to a marine environment and is durable.

Description

Technical field [0001] The invention relates to a displacement measuring device, in particular to a fiber grating displacement sensor with a temperature measuring function for marine engineering. Background technique [0002] Offshore engineering works in harsh marine environments. Steels are prone to corrosion and damage in seawater environments. Ordinary electric and vibrating wire displacement sensors have low survival rates and poor durability in seawater environments. Short-circuit damage caused by seawater intrusion is more common. The durability of the corrosion of parts is destroyed, and the electric displacement sensor is susceptible to electromagnetic interference, and the measurement signal stability is poor. At the same time, the spring-type telescopic device in the traditional displacement sensor is susceptible to the aging problem of the spring, which causes difficulty in resetting and affects the test result. In addition, the spring-type telescopic device is prone ...

AI Technical Summary

Problems solved by technology

[0002] Marine engineering works in the harsh marine environment. Steel is prone to corrosion and damage in the seawater environment. Ordinary electrical and vibrating wire displacement sensors have low survival rate and poor durability in the seawater environment. Short-circuit damage and Durability damage due to corrosion of parts, and electrical displacement sensors are susceptible to electromagnetic interference, and the measurement signal stability is poor

At the same time, the spring-type telescopic device in the traditional displacement sensor is easily affected by the spring aging problem, resulting in difficulty in reset and affecting the test results, and the spring-type telescopic device is prone to sensor damage caused by artificial overstretching

Furthermore, the current displacement sensors generally do not have the ability to measure displacement and ambient temperature synchronously. Moreover, electrical displacement sensors suffer from severe signal loss during long-distance signal transmission, making it difficult to achieve long-distance signal transmission.

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