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Ultrasonic damage judging method and system for embedded part of train axle

A technology for train axles and train wheels, applied in image data processing, instruments, calculations, etc., can solve the problems of low reliability of detection results, achieve the effects of enhancing target defect characteristics, improving accuracy, and solving low reliability

Pending Publication Date: 2021-04-23
CHENGDU TIEAN SCI & TECH
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Problems solved by technology

[0006] In view of this, the present invention provides a method and system for ultrasonic diagnosis of the embedded part of the train axle. By improving the image processing method of the ultrasonic image, the reliability of the detection results of the existing ultrasonic diagnosis method for the embedded part of the axle is solved. low problem

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  • Ultrasonic damage judging method and system for embedded part of train axle
  • Ultrasonic damage judging method and system for embedded part of train axle

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Embodiment Construction

[0018] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Such as figure 1 As shown, a method for ultrasonic diagnosis of the embedded part of the train axle, including:

[0020] S1: Obtain a single-angle ultrasonic B-scan image of the train wheel inlay. Wherein, after obtaining the single-angle ultrasonic B-scan image of the part inserted by the train wheel, the size uniform processing is performed on the ultrasonic B-scan image.

[0021] S2: Decompose the ultrasound B-scan image into a plurality of first images of different scales, calculate the saliency value of each pixel block in the plurality of first images, and generate a target area image.

[0022] Further, the S2 includes: S21: Decompose the ultrasonic B-scan image into a plurality of first images of different...

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Abstract

The invention discloses an ultrasonic damage judging method and system for an embedded part of a train axle. The ultrasonic damage judging method comprises the steps: acquiring a single-angle ultrasonic B-scan image of the embedded part of a train wheel; decomposing the ultrasonic B-scan image into a plurality of first images with different scales, calculating the significance value of each pixel block of the plurality of first images, and generating a target area image; and repeating the step S1 and step S2 until a plurality of target area images at all angles are generated, and extracting an overlapping area image of the plurality of target area images as a defect area. According to the method, multiple multi-angle ultrasonic B-scan images of the train wheel embedding part are collected, feature information of wheel set noise and defects is increased, Gaussian pyramid image decomposition is carried out on the ultrasonic B-scan images to carry out significance detection, target defect features are further enhanced, background noise is further weakened, and the detection accuracy is improved. Moreover, an accurate defect area is extracted, a detection result is generated, and the problem that the reliability of the detection result is low in an existing ultrasonic damage judgment method for the axle embedding part is solved.

Description

technical field [0001] The invention relates to the technical field of rail vehicle detection, in particular to an ultrasonic judgment method and system for an embedded part of a train axle. Background technique [0002] The inserting part of the railway train axle and the wheel or brake disc adopts mechanical interference fit. During the operation process, fatigue cracks are prone to occur at the inserting part of the axle due to alternating stress. The cracks are generally detected by ultrasonic flaw detection. However, due to the influence of the embedded part, in the ultrasonic flaw detection signal, the echo noise signal similar to the crack will be generated around the crack, and it is difficult to accurately identify the crack defect signal. [0003] Specifically, since the fatigue crack defect signal of the axle inserting part is in the same position as the noise signal of this part, the waveforms are very similar, the noise amplitude range of the inserting part of d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/70G06T5/50
CPCG06T7/0004G06T7/70G06T5/50G06T2207/10132G06T2207/20032G06T2207/20221
Inventor 张渝赵波彭建平王祯黄炜胡继东章祥马莉王小伟杜益
Owner CHENGDU TIEAN SCI & TECH
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