strain sensor

Abstract

The invention relates to a strain sensor. A sensor front end cover is hermetically and fixedly arranged on the front end part of a sensor body; a first stop dog and a grating cluster are fixedly arranged on the sensor front end cover; a first protecting sleeve is sleeved on the first stop dog; a first optical fiber protecting sleeve is fixedly arranged in the first stop dog; a slide block is glidingly and hermetically inserted into the rear end part of the sensor body; a tail end cover is fixedly arranged on the slide block; a second stop dog is fixedly arranged on the slide block in the tail end cover; a second protecting sleeve is sleeved on the second stop dog; a second optical fiber protecting sleeve is fixedly arranged in the second stop dog; an optical fiber is arranged in the sensor body; one end part of the optical fiber is fixedly arranged in the first optical fiber protecting sleeve; and the other end part of the optical fiber is fixedly arranged in the second optical fiber protecting sleeve. Compared with the strain sensor of the common optical fiber grating, the strain sensor has the advantages that the measuring precision is obviously improved, the self error of the sensor is avoided, and the strain sensor is convenient to mount, corrosion-resistant, water-proof, reliable in use and long in service life.

Description

technical field [0001] The invention relates to a strain detection device, in particular to a strain sensor. Background technique [0002] In major civil engineering structures and infrastructure and equipment, such as bridges, tunnels, long-span space structures, super high-rise buildings, large dams, nuclear power plants, offshore oil platforms, and large lifting equipment, the service life is as long as decades, and even century. During its working process, due to the coupling effect of factors such as environmental loads, fatigue effects, corrosion effects, and material aging, the structure inevitably produces damage accumulation and resistance attenuation, thereby reducing the ability to resist loads, and even causing catastrophic emergencies. Accidents will directly cause heavy casualties and economic losses, so the above-mentioned strain detection is very important and necessary. Contents of the invention [0003] The purpose of the present invention is to overcom...

AI Technical Summary

Problems solved by technology

During its working process, due to the coupling effect of factors such as environmental loads, fatigue effects, corrosion effects, and material aging, the structure inevitably produces damage accumulation and resistance attenuation, thereby reducing the ability to resist loads, and even causing catastrophic emergencies. Accidents will directly cause heavy casualties and economic losses, so the above-mentioned strain detection is very important and necessary

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