Optical fiber sensor for concrete crack detection

By designing an optical fiber sensor including a mount, a monitor, a movable plate and an optical fiber body, the problems of low detection efficiency and inaccurate data in the prior art are solved, and more efficient and accurate detection effects are achieved.

CN222670992UActive Publication Date: 2025-03-25CHINA CONSTRUCTION WESTERN CONSTRUCTION GROUP NO 8 (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202421557062.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-03
Publication Date
2025-03-25
Estimated Expiration
2034-07-03

AI Technical Summary

Technical Problem

The existing concrete crack detection methods are inefficient and the data are inaccurate, especially when optical fiber sensors are installed, it is easy to cause optical fiber to break, affecting the detection results.

Method used

An optical fiber sensor including a mount, a monitor, a movable plate and an optical fiber body is designed. The distance between the mount and the movable plate is adjusted by adjusting the assembly, and the coordination of the movable plate and the sleeve is used to avoid optical fiber breakage, and the optical transmission characteristics of the optical fiber are detected through the monitor to obtain the distance information of the cracks.

Benefits of technology

It improves the accuracy and efficiency of concrete crack detection, avoids the fracture problem of optical fiber sensors during installation, and ensures the reliability of detection data.

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Abstract

The utility model relates to an optical fiber sensor for concrete crack detection, which comprises a mounting seat, a monitor, a movable plate and an optical fiber body, the bottom end of the mounting seat is mounted on one side of a concrete crack, the monitor is arranged on one side of the back of the mounting seat, the movable plate is movably mounted on the other side of the mounting seat, and the optical fiber body is mounted on the movable plate. The bottom end of the movable plate is installed in a concrete crack, an adjusting assembly is arranged between the installation base and the movable plate and used for adjusting the distance between the installation base and the movable plate, the open end of the optical fiber body penetrates through the installation base to be connected with the monitor, and the side, away from the open end, of the optical fiber body is movably connected with the movable plate. And the monitor is used for detecting the transmission characteristic of light of the optical fiber body so as to detect the distance of the concrete crack. According to the utility model, parameter information is obtained by measuring the intensity, phase or frequency change of light, so that the purpose of convenient detection is achieved.
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