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A method and system for detecting broken wires in a cable

A detection method and broken wire technology, which is applied in the direction of optical testing for flaws/defects, etc., can solve the problems of reduced vertical stiffness, difficulty in judging broken wires, and insignificant changes in cable force, and achieve the effect of avoiding overall damage

Active Publication Date: 2016-04-13
SHENZHEN MUNICIPAL DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. After a single cable is broken, stress redistribution occurs inside the cable, and the tension on other steel wires (or steel strands) of the cable will increase. After the wire is broken, the vertical stiffness of the boom will decrease. Redistribution of force occurs in the whole bridge system, and the change of the cable force of the whole cable is not obvious
[0005] 2. If the amount of broken wires is large, it can be monitored that a certain cable or a few cables have a large change in the force of the cables, and it is difficult to judge which cable has broken wires and the amount of broken wires.
[0006] Judging from the current research and application status, there is no monitoring method that can monitor the broken wire of the cable bridge and understand the working status of the cable in essence.

Method used

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  • A method and system for detecting broken wires in a cable
  • A method and system for detecting broken wires in a cable
  • A method and system for detecting broken wires in a cable

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other Embodiment approach

[0025] In other implementation manners, the above numerical signal data can be sent to a collection terminal, such as a data collection station, and then sent by the data collection station to a device with a broken wire identification function.

[0026] In step S20, the data information of the one-to-one correspondence between the strain change amount of the steel wire in the cable or the suspender and the wire breakage amount is obtained, and the data relationship information is stored. In this step, the analysis model of the cables at each position on the bridge is established based on the design data of the bridge to which the cables or suspenders belong. A part of the force will be released through the connection at both ends. Here, the strain change of the remaining steel wire in the cable is used to calibrate the broken wire amount of the cable.

[0027] Such as figure 2 As shown, it is a structural block diagram for obtaining one-to-one correspondence data informatio...

other Embodiment approach

[0048] In other embodiments, the above-mentioned numerical signal data can be sent to a collection terminal, such as a data collection station (not shown in the figure), and then sent by the data collection station to a device with a broken wire identification function.

[0049] The broken wire calibration device 2 is used to obtain the data information corresponding to the strain change amount of the steel wire in the cable or suspender Tn and its broken wire amount one-to-one, and store the data relationship information. It uses the design data of the bridge where the cable or suspender Tn belongs to, and establishes the analysis model of the cable at each position on the bridge. When the cable breaks, the cable force of the cable will be redistributed on the remaining steel wires, and will also pass through The connection at both ends removes part of the force, and here the amount of broken wires of the cable is calibrated by the strain change of the remaining steel wires in...

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Abstract

The invention discloses a method for detecting an inhaul cable broken wire. The method comprises the following steps of acquiring strain variation data of steel wires in an inhaul cable or a hanger rod, acquiring data relation information of the strain variation and a corresponding broken wire amount of the steel wires in the inhaul cable or the hanger rod, storing the data relation information, judging if the broken wire amount of the steel wires in the inhaul cable or the hanger rod reaches to a preset value or not according to the acquired strain variation data of the steel wires in the inhaul cable or the hanger rod, and the stored data relation information, and giving an alarm when the broken wire amount of the steel wires in the inhaul cable or the hanger rod reaches to the preset value. The invention also discloses a system for detecting an inhaul cable broken wire. The method and the system can realize early warning by processing monitored data. When the broken wire amount of the inhaul cable is greater than an allowable value, the system can automatically give an alarm and is convenient for further examination and replacement of the faulted inhaul cable so that integral destroy of a bridge is avoided.

Description

technical field [0001] The invention relates to the field of broken wire monitoring of a cable, in particular to a broken wire detection method and system for a cable or a boom that can monitor the broken wire of a cable or a boom in real time. Background technique [0002] For cable-stayed bridges: suspension bridges, cable-stayed bridges, suspension rod arch bridges, etc., the cables (suspenders) are the main stress-bearing components of the bridge, and the breakage of the cables can easily cause the overall collapse of the bridge. The health monitoring system hopes to understand the health status of the bridge by monitoring the operation status of the bridge. Avoid bridge damage and collapse. However, the collapse and damage of cable bridges with a health monitoring system also occur from time to time, and from the damage of cable bridges, it is basically caused by the failure of the cables. [0003] At present, when establishing a health monitoring system for cable-sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/88
Inventor 姜瑞娟陈宜言于芳
Owner SHENZHEN MUNICIPAL DESIGN & RES INST