Real-time monitoring device and monitoring method of cable force

A real-time monitoring and cable force technology, applied in the field of bridge engineering and construction, can solve the problems of non-uniform strain changes of point strain sensors, difficulty in ensuring absolute centering of the force measuring ring, and affecting the accuracy of cable force monitoring, etc., to achieve a unique Long-term weather resistance, unique anti-electromagnetic interference ability, and stable monitoring results

Active Publication Date: 2019-08-02
HUBEI UNIV OF TECH
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Problems solved by technology

However, limited by cable length, installation space and location, the force measuring ring is usually a thick-walled ring structure, and the stress of each section is not uniformly distributed, but varies with height, and the slight deviation of the installation position of the point strain sensor may lead to large deviation in

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  • Real-time monitoring device and monitoring method of cable force
  • Real-time monitoring device and monitoring method of cable force
  • Real-time monitoring device and monitoring method of cable force

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[0033] The specific structure and embodiments of the present invention will be further described below with reference to the accompanying drawings, but the protection scope of the present invention should not be limited by this.

[0034] like figure 1 and figure 2As shown, a real-time monitoring device for cable force includes a force measuring ring 3 and 8 long gauge fiber grating strain sensors 13. The force measuring ring 3 is a hollow ring, which includes a first force bearing ring 10, a second The force-receiving ring 11 and the side wall 15 are provided with axial grooves on the side wall 15 to form a narrow column 12 for installing the sensor. In this embodiment, the number of narrow columns 12 is 8, and each narrow column 12 is installed on the One long-gauge length fiber grating strain sensor 13, generally more than four long-gauge length fiber grating strain sensors 13 can obtain stable data. The long gauge length fiber grating strain sensor 13 is firmly connected...

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Abstract

The invention discloses a real-time monitoring device and monitoring method of a cable force. The monitoring device comprises a cage-structure force measurement ring, wherein a groove is formed in a side wall of the cage-structure force measurement ring, a plurality of long-gauge length fiber grating precision strain sensors are arranged at a middle part of the side wall of the force measurement ring, average strain of an intermediate segment of the intermediate ring within a certain range is measured, a fiber grating temperature sensor is arranged to compensate a temperature, the strain is converted to an optical signal by the fiber grating sensors, the optical signal is transmitted to a fiber grating demodulator for demodulation by an optical cable, and the optical signal is transmittedto a computer by a network cable. Load test is performed in a laboratory, average strain data acquired by the plurality of long-gauge length stress sensors is combined to perform least square fit analysis, and a relation curve of the pressure of the test ring and equivalent axis average strain is calibrated. The controller is used for analyzing real-time monitoring data of a force measurement ring, the cable force is solved, and automatic real-time monitoring of the cable force is achieved.

Description

technical field [0001] The invention belongs to the field of bridge engineering construction, and relates to a cable force monitoring technology, in particular to a cable force real-time monitoring device and a monitoring method, which are used in bridge engineering of a cable-bearing system, and are used for pulling various cable-stayed bridges, suspension bridges, arch bridges, etc. Long-term real-time monitoring of the cable force of cables and booms. Background technique [0002] Cables or suspenders are the main load-bearing components of bridges with cable-supported systems. Real-time monitoring of their stress conditions and diagnosing damage is of great significance to the safe operation of structures. At present, the existing cable force monitoring technology is mainly divided into indirect method and direct method. The indirect method measures the physical parameters related to the cable tension, and then uses the correlation between the parameters and the tension...

Claims

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Application Information

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IPC IPC(8): G01L5/04G01L1/24
CPCG01L1/246G01L1/247G01L5/0033G01L5/047
Inventor 王超
Owner HUBEI UNIV OF TECH
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