Fiber grating cable tension transducer with temperature self-compensation function

Abstract

The invention provides a fiber grating cable tension transducer with a temperature self-compensation function, belonging to the field of transducer technologies. The transducer provided by the invention is characterized by comprising a metal baseplate, a clamping piece, a micro fiber grating strain transducer and a cable component of fiber transmission. The measuring sensitivity of the transducer can be adjusted by changing sizes of elements of the transducer in accordance with actual requirements, thus being suitable for monitoring cable tension of the different cables in real time. The fiber grating cable tension transducer can measure the cable tension of the cables indirectly by measuring an anchor head structure and utilize the properties of the fiber grating to improve the cable tension sensitivity coefficients of the transducer, and is not influenced by structural materials and external environments. The fiber grating cable tension transducer can eliminate influences of eccentric forces on measuring values, realize the temperature self-compensation and overcome the defects that a traditional electric transducer is subjected to electromagnetic interference easily and is poor in long-term stability, and has the advantages of high accuracy, light weight, low influences on the properties of the structure and the like.

Description

technical field [0001] The invention belongs to the technical field of tension measurement tools based on sensing technology, and relates to a cable force sensor based on fiber grating technology, which is especially suitable for cable load-bearing structures such as gymnasiums, stadiums, cable-stayed bridges, and suspension bridges. Background technique [0002] Flexible systems such as suspension cable structures, membrane structures, and cable-membrane structures all use tension to resist external loads, and can be collectively referred to as tension structures. As a key stress-bearing component of a tension structure, the stress state and dynamic response of the cable are closely related to the dynamic response of the main body of the structure. The stress state and dynamic characteristics of the cable are important parameters to measure whether the structure is in a normal state. However, due to structural design, external corrosion, fatigue accumulation and other reaso...

AI Technical Summary

Problems solved by technology

[0004] Due to the aging problem of the glue, the traditional adhesive connection method cannot guarantee the stability and reliability requirements of long-term monitoring

Due to the safe use requirements of the steel wire in the cable, any destructive operations that may affect its strength cannot be performed on the surface. In addition, considering the cable manufacturing process, progress and sensor cost, it is not possible to directly place the fiber grating strain sensor in the cable body. Such as the way of direct connection with steel wire

Images