Optical fiber grating with adjustable sensitivity and how to use it

Abstract

A fiber grating strain sensor with adjustable sensitivity, comprising a sensor housing and a left sticking plate, a spring, a right sticking plate and an optical fiber with a strain grating inside the sensor housing. The glue point is connected with the top of the left and right pasting boards, the inner walls of the left and right pasting boards are connected by springs, the left end of the No. 1 adjusting bolt is connected with the outer wall of the left pasting board, and the right end of the No. Paste plate, spring inside, right paste plate are connected with No. 1 adjusting nut behind, the outer wall of described left and right paste plate is respectively connected with the inner end of left and right transmission rod correspondingly, and the outer end of left and right transmission rod respectively passes through After passing through the sensor housing, it is correspondingly connected with the left and right movable joints. This design not only can adjust the sensitivity without changing the packaging structure, but also can adjust the measurement range, and has a wide range of applications.

Description

technical field [0001] The invention belongs to the field of optical fiber grating strain sensors, and in particular relates to an optical fiber grating strain sensor with adjustable sensitivity and a using method thereof. Background technique [0002] As one of the more popular high-tech, fiber grating has a series of unique advantages compared with traditional sensors, such as small size, light weight, high precision, passive, anti-electromagnetic interference, good long-term stability, and Optical fiber carriers can transmit signals over long distances, and have great application prospects in aerospace, national defense construction, energy, industrial production, and daily life. [0003] Fiber optic strain sensors are less affected by the environment after they are fully packaged. Compared with traditional strain testing methods such as resistance strain gauges, fiber optic strain sensors not only have better long-term stability and reliability, but also have small size,...

AI Technical Summary

Problems solved by technology

[0004] However, once the existing optical fiber strain sensor is packaged, the sensitivity and measurement range of the sensor are fixed, and due to different application fields, the requirements for the strain measurement range and sensitivity of the sensor are also different, so it is necessary to design different packaging structures or change Only the packaging structure can meet the actual needs, which leads to a lot of trouble when it is necessary to change the sensitivity of the sensor

Images