Knocking scan type bridge damage detecting and positioning system

Abstract

The invention discloses a knocking scan type bridge damage detecting and positioning system which comprises a traveling car, a knocking subsystem, a signal acquisition subsystem, a signal processing device and a positioning device. The traveling car can move on a to-be-detected bridge; the knocking subsystem is arranged on the traveling car, and is used for applying a knocking load to the to-be-detected bridge; the signal acquisition subsystem is arranged on the traveling car and is used for collecting a response signal transferred from the to-be-detected bridge to the traveling car; the signal processing devise is connected with the signal acquisition subsystem, and is used for receiving and processing the signal collected by the signal acquisition subsystem, and outputting the bridge damage information processed result; the positioning device can move together with the traveling car and is used for real-time detecting and recording the position information of the traveling car. The knocking scan type bridge damage detecting and positioning system provided by the invention can detect bridge damage information in a simple, convenient, efficient and high-accuracy manner, and can locate damage positions of a bridge.

Description

technical field [0001] The invention relates to a bridge damage detection system, in particular to a knock-and-scan type bridge damage detection and positioning system. Background technique [0002] With the advancement of science and technology and the improvement of transportation demand, the number of bridges for various highways and rail transits has increased rapidly. During the use of these bridges, they are constantly eroded by external environments such as temperature changes, strong winds, and rainfall. At the same time, they are eroded by vehicles The long-term repeated action of load and vehicle impact, and some bridges will also be damaged by natural disasters such as floods and earthquakes. With the increase of service life, bridges generally experience different degrees of fatigue effects and aging phenomena. External damage has caused many bridges to become dangerous bridges in a certain sense. There have been a large number of collapse instances of bridges at...

AI Technical Summary

Problems solved by technology

[0003] From the perspective of implementation cycle and detection accuracy, bridge inspection mainly includes two methods: regular inspection and real-time monitoring: regular inspection, such as manual inspection, bridge dynamic and static load test, etc., although this method has high accuracy, but the time interval is long, which is not conducive to Timely detection of bridge diseases requires interruption of bridge traffic, which is difficult to implement; real-time monitoring, such as some bridge health monitoring systems, although this method has good real-time performance, has low precision and high cost, so it is difficult to obtain widespread application in a short period of time. use

[0004] From the perspective of practical operation, the existing bridge damage identification technology can be divided into two methods: offline local detection and online overall monitoring. , electromagnetic eddy current, X-ray, etc., to carefully detect the damage in the structure. This method has high detection accuracy, but it often needs to interrupt the traffic and affect the normal operation of the bridge, and it is necessary to know the approximate location of the damage in advance. There are detection dead ends. Low efficiency; on-line overall monitoring is to preset sensors in the bridge structure to obtain structural response signals in real time to infer the damage in it. Although this method does not need to interrupt bridge traffic, the detection accuracy is low, and there are still sensors installation, transmission and storage of massive signals, noise immunity and durability of sensors, etc.

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