Novel digital ultrasonic flaw detection system and method

Abstract

The invention discloses a novel digital ultrasonic flow detection system and a method. The novel digital ultrasonic flow detection system comprises a probe device, an ultrasonic transmitting/receiving device and a preposed amplifying device which are connected with a flaw echo programmed control amplifying device, a flaw echo filter device and a flaw echo A/D conversion device of the preposed amplifying device, a bottom echo programmed control amplifying device, a bottom echo filter device, a bottom echo wave detection device and a bottom echo A/D conversion device, and an interface wave programmed control amplifying device, an interface wave filter device, an interface wave detection device, and an interface wave A/D conversion device in turn, and are connected with digital signal processors of the flaw echo A/D conversion device, the bottom echo A/D conversion device and the interface wave A/D conversion device, wherein the signal processors are connected with a man-machine interface device. The system adopts a bottom echo correction method and an interface wave and bottom echo unified correction method. So, the novel digital ultrasonic flaw detection system and the method for reducing influences, caused by coupling layer changes in the flaw detection process, on a detection result, reducing the high dependency of the detection result to inspectors, and improving the accuracy and the reliability of the detection result are provided by the invention.

Description

technical field [0001] The invention relates to a flaw detection system and method, in particular to a system and method utilizing digital ultrasonic flaw detection. Background technique [0002] Ultrasonic Testing UT (Ultrasonic Testing UT) is one of the five conventional non-destructive testing methods (respectively: ultrasonic, ray, magnetic particle, penetration and eddy current). Compared with other conventional technologies, ultrasonic testing has the advantages of wide range of measured objects, large detection depth, high sensitivity, low cost, convenient use, fast speed, no harm to the human body and easy on-site use. It is the most widely used at home and abroad. Non-destructive testing technology. Digital ultrasonic flaw detector is one of the most important tools to realize ultrasonic flaw detection. [0003] At present, the commonly used ultrasonic flaw detectors at home and abroad are single-channel, and whether it is a defect is judged according to the size ...

AI Technical Summary

Problems solved by technology

Also because the interface wave is much lower than the defect wave (usually the difference is more than 20dB), the conventional single-channel digital ultrasonic flaw detector cannot monitor the interface wave and the defect wave at the same time.

Conventional multi-channel detection devices cannot perform fusion processing of data between different channels at the bottom layer, and cannot realize fusion processing of bottom waves, damage waves or interface waves, so they cannot meet the needs of reducing false positives and improving defect positioning and quantitative accuracy.

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