A displacement sensor device and its application

Abstract

The application belongs to the technical field of measuring equipment, and in particular relates to a displacement sensing device and its application. Smart cables with built-in optical fiber sensors are used in the existing cable detection and monitoring. The status of the optical fiber sensor itself is uncertain, and the data reliability in the application process is insufficient. For the smart cable with built-in magnetic flux internal sensor, since the sensor derives the force of the cable through the change of the cross-sectional area of ​​the cable, it cannot effectively analyze the state of the cable when the cable is corroded or part of the section is out of work for other reasons. The present application provides a displacement sensing device, comprising interconnected displacement sensing components and power supply acquisition components, the displacement sensing components include a displacement sensor, a sensing steel wire and a measuring steel wire, the displacement sensor is connected to one end of the sensing steel wire connected, the other end of the sensing steel wire is connected to one end of the measuring steel wire. With convenient replacement conditions, the production, transportation, installation, use and subsequent maintenance of smart cables are more convenient.

Description

technical field [0001] The application belongs to the technical field of measuring equipment, and in particular relates to a displacement sensing device and its application. Background technique [0002] Stay cables are also commonly referred to as cables, stay cables, stay cables, slings, suspenders, tie rods, external cables and steel beams, and are used in large civil engineering infrastructure such as cable-stayed bridges, suspension bridges, cable-stayed arch bridges and For buildings that use cables to bear the load, the cables help the structure to achieve large-span spans or provide high-strength prestress, and are a key structural member that transmits tensile loads. Effective cable detection and automatic monitoring methods can avoid unnecessary maintenance and replacement, greatly increase the service life of the cable, and can accurately evaluate its safety status to avoid catastrophic accidents such as failure. [0003] The construction and maintenance of infra...

AI Technical Summary

Problems solved by technology

Among the existing cable detection methods, the manual detection method mainly observes the structural surface with the naked eye or a magnifying glass, and is powerless to detect internal defects; the detection method of ultrasonic or shock wave instruments passes through the generation of fluctuation signals, and analyzes the obtained fluctuation signals to detect The size and location of the damage of the cable, but when the surface of the cable wire is uneven, the cable is restrained or the signal interference caused by other structural reasons cannot be effectively analyzed and screened; the ray detection can only detect a section, and cannot detect the anchorage area , the detection cost is relatively high, the instrument is expensive, and it has certain radiation; although the magnetic flux leakage detection method can clearly determine the position and quantity of broken wires, the equipment is complicated, and the detection accuracy is not good for pulling slings with outer protective layers. High, the spatial resolution of the same defect is not high, and the detection effect is even worse for the damage of the sling buried in the beam

In the automatic monitoring of cables, there are intelligent cables with built-in optical fiber sensors. Due to the great difference in the materials of optical fibers and cables, the state of the optical fiber sensor itself is uncertain, and the data feasibility in the application process is insufficient; intelligent cables with built-in magnetic flux sensors , since the sensor deduces the force of the cable through the change of the cross-sectional area of ​​the cable, the state of the cable cannot be effectively analyzed when the cable is corroded or part of the section is out of work for other reasons

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