Hollow shaft ultrasonic automatic damage judgment method and system

Abstract

The invention discloses a hollow shaft ultrasonic automatic damage judgment method and system. The method comprises the steps: collecting an ultrasonic B scanning image and an ultrasonic C scanning image of a train hollow shaft; extracting inherent structure echo data and first defect echo data of the hollow shaft based on the ultrasonic C-scan image; extracting second defect echo data of the hollow shaft based on the ultrasonic B-scan image; eliminating the structure echo data contained in the second defect echo data based on the structure echo data, and generating third defect echo data; and based on the first defect echo data and the third defect echo data, performing combined damage judgment and generating a detection report. According to the invention, the ultrasonic B-scan image and the ultrasonic C-scan image of different spatial dimensions are collected, and combined damage judgment is carried out by combining the positioning information of the first defect echo data and the third defect echo data obtained based on the B-scan channel and the C-scan channel under different spatial dimensions, so that the detection precision of the defect area is further improved; and automatic damage judgment of the train hollow shaft is realized.

Description

technical field [0001] The invention relates to the technical field of rail vehicle detection, in particular to a hollow shaft ultrasonic automatic damage detection method and a system thereof. Background technique [0002] The hollow shaft is the main rotating part of high-speed trains such as bullet trains and high-speed railways. In order to ensure the safety of high-speed trains, ultrasonic automatic flaw detection technology must be used for hollow shaft defect detection. At present, the hollow shaft ultrasonic flaw detection equipment basically only performs a single gate flaw judgment based on the echo amplitude. For the ultrasonic flaw detection of hollow shafts, solid shafts or other components, various research institutions or universities have carried out more in-depth automatic judgments. However, they only stay at the research stage and only use the characteristics of various echoes of a single ultrasonic channel for pattern recognition, support vector machine a...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a hollow shaft ultrasonic automatic injury detection method and its system, which solves the problem of low reliability of detection results in the existing hollow shaft ultrasonic detection method by improving the ultrasonic image acquisition and image processing methods

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