Intelligent distinguishing method and system for inhaul cable operation state

A technology of operating state and identification method, applied in the field of cable-stayed bridge, suspension bridge and arch bridge operating state identification, can solve the problems of low accuracy, large error, and disadvantage of correctly identifying the working state of the cable.

Inactive Publication Date: 2009-08-12
NANJING UNIV OF TECH +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method with good detection effect, wide application range, simple operation, and low precision and large errors existing in the current vibration method to detect t

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  • Intelligent distinguishing method and system for inhaul cable operation state
  • Intelligent distinguishing method and system for inhaul cable operation state
  • Intelligent distinguishing method and system for inhaul cable operation state

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] like figure 1 shown.

[0037] A method for intelligently judging the operating state of a cable, comprising the following steps:

[0038] The first step is to install a sensor for vibration detection on the cable that needs to be detected (commercially available mature products can also be used, and a sensor with wireless transmission function can also be used), and the environmental vibration signal of the cable is collected and sent to the computer;

[0039] In the second step, use the computer to perform Fourier transform (that is, FFT transform, which can be realized by existing mature software) on the data collected in the first step to obtain the main frequency of the first 8 vibrations: f 1，0 , f 2  ….f 8 :

[0040] The third step is to calculate the tension S of the cable according to the divalence frequency in the main frequency of ...

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Abstract

The invention discloses a method and a system for intelligently identifying the operation state of an inhaul cable. The method is to respectively detect vibration frequencies before and after loading through a sensor arranged on the inhaul cable to carry out FFT conversion and related calculations respectively, thereby acquiring cable force, bending rigidity and rotational restrict stiffness at two ends of the inhaul cable. The method and the system have the advantages of simplicity, easy realization, high precision and small power consumption.

Description

technical field [0001] The present invention relates to a cable-stayed bridge, a suspension bridge, and an arch bridge cable operating state identification technology, in particular to a cable-stayed high-precision, multi-variable discrimination method and system thereof, specifically an intelligent identification method and system for the cable operating state system. Background technique [0002] As we all know, stay cables are important force-transmitting components of cable bridges, which bear axial tension and are mostly made of high-light parallel steel wire bundles or steel strands. The stress and working state of the cables are one of the important signs that directly reflect whether the bridge is in normal operation. During the bridge construction process, the cable force of the bridge cables and the internal force of the bridge must be monitored and optimized. After the bridge is completed, the cables must also be retested to understand the working status of the c...

Claims

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Application Information

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IPC IPC(8): G01L5/10
Inventor 王俊刘伟庆钟建驰吉林冯兆祥陈策阮静蒋波
Owner NANJING UNIV OF TECH
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