Fiber bragg grating cable force sensor packaging structure

Abstract

The invention relates to a fiber bragg grating cable force sensor packaging structure, which belongs to the technical field of cable force measurement and structure safety monitoring. The fiber bragggrating cable force sensor packaging structure comprises a fiber bragg grating, the fiber bragg grating penetrates through a protection tube, a fixed terminal is arranged at one end of the protectiontube, a pre-tensioning terminal is arranged at the other end of the protection tube, one end of the fiber bragg grating penetrates through the fixed terminal, the other end of the fiber bragg gratingpenetrates through the pre-tensioning terminal, and the inner ends of the fixed terminal and the pre-tensioning terminal are arranged in the protection tube. And the outer ends of the fixed terminal and the pre-tensioning terminal are respectively connected with the tail sleeve unit to package the fiber bragg grating. The tail sleeve unit comprises a tail sleeve and a tail sleeve terminal, and thetail sleeve is in threaded connection with the tail sleeve terminal. The pre-tensioning terminal is provided with a pre-tensioning nut, the pre-tensioning nut is in threaded connection with the pre-tensioning terminal, and the other end of the protection tube abuts against the pre-tensioning nut. Pre-tensioning of the fiber bragg grating can be achieved, bending of the fiber bragg grating and thetail fiber is prevented, damage to the sensor in the transportation process and the installation process is reduced, and stretching protection is achieved for the fiber bragg grating.

Description

technical field [0001] The invention relates to a packaging structure of a fiber grating cable force sensor, belonging to the technical fields of cable force measurement and structural safety monitoring. Background technique [0002] Due to the outstanding advantages of high flexibility, high tensile strength, and long load transmission distance, cables have been widely used in fields such as long-span bridges, large-scale building structures, and traction machinery, including cable-stayed cables, passenger ropeways, steel wire ropes for elevators, and various A variety of lifting equipment slings and other forms. During the use of the steel cable, damage will accumulate due to the influence of atmospheric environment corrosion, mechanical friction or fatigue damage; at the same time, due to the uncertainty of the load, the steel cable will inevitably suffer various damages, resulting in the actual load of the steel cable. The capacity is reduced, so that the steel cable ma...

AI Technical Summary

Problems solved by technology

It is precisely these characteristics that fiber grating sensing technology has outstanding advantages in cable force testing. However, there are still many very difficult problems in its application in actual engineering.

For example, the pre-tensioning operation of the fiber grating is inconvenient, the pigtail of the fiber grating is easy to bend, which reduces the service life of the fiber grating sensor, etc.

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