An intelligent detection system and method for bridge steel structure cracks based on ultrasonic guided waves

Abstract

The invention discloses an intelligent detection system for bridge steel structure cracks based on ultrasonic guided waves, comprising: a host computer: used to modulate excitation signals; receive echo signals; an ultrasonic guided wave instrument: used to generate excitation signals; Seat: for locating, installing and supporting the upper acoustic emission sensor and the lower acoustic emission sensor; upper acoustic emission sensor: for converting the excitation signal into an ultrasonic wave and transmitting it to the steel structure to be tested, and The received reflected echo is converted into an echo signal; the lower acoustic emission sensor: used to convert the excitation signal into an ultrasonic wave and transmit it to the steel structure to be tested, and convert the received reflected echo into an echo signal. wave signal. The invention also discloses a bridge steel structure crack detection method based on the ultrasonic guided wave. The invention can realize long-distance non-destructive detection capability, and has the advantages of fast detection speed, high efficiency, convenient installation and use, low detection cost, good detection accuracy and the like.

Description

technical field [0001] The invention relates to the field of non-destructive testing of steel structures, in particular to an intelligent detection system and method for bridge steel structure cracks based on ultrasonic guided waves. Background technique [0002] China's long-span bridges mostly use steel structure bridges, which have the characteristics of light weight, high strength, and short construction period. In order to ensure the quality, safety and stable operation of steel structure bridges, bridge steel structure non-destructive testing has become an important part of bridge testing. Bridge steel structure detection technology has become a research hotspot in bridge non-destructive testing. [0003] At present, the detection of steel structure bridges mostly adopts point-by-point inspection of vulnerable parts and manual inspection. The steel structure cracks are small in the initiation stage, and are not easy to be found in the early stage, and there is a risk o...

AI Technical Summary

Problems solved by technology

At present, there is no integrated equipment suitable for ultrasonic guided wave testing of bridge steel structures on the market. The detection of bridge steel structures is complicated and cumbersome. An intelligent ultrasonic guided wave testing equipment suitable for bridge steel structures is urgently needed.

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