Sensing optical fiber temperature-sensitive compensation packaging device and operating method

Abstract

The invention discloses a sensing optical fiber temperature-sensitive compensation packaging device and an operation method. The device comprises a fiber-loaded guide and connection module and a temperature-sensitive compensation module, wherein a first sensing optical fiber, a second sensing optical fiber and a third sensing optical fiber pass through the fiber-loaded guide and connection module; the fiber-loaded guide and connection module is provided with a built-in fiber fixing module for fixing the first sensing optical fiber and the third sensing optical fiber; the first sensing optical fiber and the third sensing optical fiber are fixed via the built-in fiber fixing module and then arranged in parallel with the second sensing optical fiber; the first sensing optical fiber and the third sensing optical fiber are located on the upper surface of an arc-shaped shell; and the second sensing optical fiber passes through the temperature compensation device and is then fixed on the other fiber-loaded guide and connection module. Temperature interference influences can be removed from the monitoring aspect, the strain state of the inner stress of a to-be-detected structural body can be truly reflected, and an important guarantee is provided for truly monitoring the stress strain state of an actual project.

Description

technical field [0001] The invention relates to a sensing optical fiber temperature-sensitive compensation packaging device and an operation method, which belong to the field of safety and health monitoring of wading engineering and civil engineering. Background technique [0002] In the 1960s, due to the invention of laser and optical fiber, optical fiber technology achieved remarkable success. Driven by optical communication technology, the research and development of various optical fibers, devices, components, instruments and mechanical devices and other related devices made great progress. With the continuous deepening of optical fiber application research and the continuous development of sensing technology, optical fiber has become a kind of information that can not only transmit the information obtained by sensors at high speed and large capacity, but also can be used as a transmission Compared with traditional sensing elements, optical fiber sensing technology has t...

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Problems solved by technology

[0003] Since Montez and others first embedded fiber optic sensors in concrete structures for structural safety monitoring in 1989, scholars from various countries have further promoted the application of this technology in civil and hydraulic engineering. Now fiber optic sensing technology has been used to monitor the curing of composite materials. , Structural non-destructive testing, damage monitoring, identification and evaluation have achieved some results. For point-type optical fiber sensing technology, its monitoring accuracy is high, but it does not break away from the disadvantages of the most traditional monitoring instruments. Therefore, distributed sensing Optical fiber sensing technology has been greatly developed, but whether it is point-type optical fiber sensing monitoring technology or distributed sensing optical fiber monitoring technology, when simply obtaining the stress and strain values ​​of the structure in the actual working environment, it is impossible to escape the interaction between the outside of the structure and The influence of internal temperature, many current temperature compensation methods are extremely crude and inaccurate, but the influence of temperature is extremely obvious in many places. Therefore, it is extremely important to develop a sensing optical fiber packaging device that can realize temperature compensation

[0004] For the structure to be tested, the interference of many external complex factors causes the structure to be tested to represent a variety of complex external characteristics, and the external information is the soft body of the internal information of the structure to be tested. According to the extracted external information , even if many advanced data optimization algorithms are used, it is impossible to truly separate and identify various information embedded in the structure and reflect the structure. This requires starting from the monitoring device to study a method that can remove some interference factors monitoring equipment

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