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Ultrasonic edge detection method and system

An edge detection and ultrasonic technology, which is applied in the field of ultrasonic edge detection methods and systems, can solve the problems that defects cannot be precisely detected, and achieve the effects of improving measurement accuracy, reducing false detection rate, and improving detection accuracy

Pending Publication Date: 2021-02-09
西安维控自动化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ultrasonic edge detection method and system to solve the problem in the prior art that defects with a diameter ≤ 2 mm cannot be precisely detected

Method used

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  • Ultrasonic edge detection method and system

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Embodiment 2

[0066] In this embodiment, an ultrasonic edge detection system is disclosed, including an ultrasonic probe A, an action control unit C, a data acquisition unit D, a data analysis unit E and a graphic display unit F;

[0067] The ultrasonic probe A is used to obtain an ultrasonic detection frame, and evenly divides the ultrasonic detection frame into 2m rows and 2n columns to obtain 2m×2n ultrasonic detection blocks;

[0068] The action control unit C is used to control the servo motor to drive the ultrasonic probe A to move in the defect area, the distance that the ultrasonic probe A moves each time is the length or width of an image block, and the direction that the ultrasonic probe A moves each time is horizontal or vertical;

[0069] The data acquisition unit D is used to collect the ultrasonic return value when moving each time, and transmit the ultrasonic return value to the data analysis unit E; it is also used to evenly divide the area to be detected to obtain a pluralit...

Embodiment 3

[0075] In this embodiment, an ultrasonic edge detection method is disclosed, specifically for the measurement of a thin shell object to be tested. In this embodiment, as Figure 5 As shown, the dark area on the left in the figure is the normal area, according to 1mm 2 / blocks are divided, numbers 1-14 are defined as the first boundary image blocks, and numbers 91-99 are the second-layer boundary image blocks after the irregular shape boundary. The white area in the middle is the defective part, also according to 1mm 2 / block is divided, numbers 21-34 are the first boundary image blocks of the defect boundary, 51-59 are the second-layer boundary image blocks after the irregular shape boundary, and the far right is the area that the ultrasonic probe can cover in one detection, that is, ultrasonic The detection frame area is the ultrasonic probe. Its area = 100mm 2 .

[0076] Assuming the height of the normal block is 100, and the moving speed of the ultrasonic probe is 1mm...

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Abstract

The invention belongs to the technical field of testing, and particularly relates to an ultrasonic edge detection method and system. The method comprises the following steps: step 1, acquiring an ultrasonic detection frame, and uniformly dividing the ultrasonic detection frame into 2m * 2n ultrasonic detection blocks; step 2, segmenting a to-be-detected area to obtain a plurality of image blocks,and establishing a corresponding matrix for each image block to obtain a plurality of matrixes; step 3, moving the ultrasonic detection frame in the to-be-detected area, collecting a current ultrasonic return value every time the ultrasonic detection frame moves, respectively filling the ultrasonic return value into the matrixes corresponding to the image blocks covered by the current ultrasonic detection frame, stopping moving until all the matrixes are complete, and taking the complete matrix as a measurement result matrix; and step 4, obtaining a boundary threshold value and an ultrasonic measurement value of each image block, comparing the ultrasonic measurement value of each image block with the boundary threshold value to obtain a defect image block set, and obtaining a defect edge shape according to the defect image block set.

Description

technical field [0001] The invention belongs to the technical field of testing, and in particular relates to an ultrasonic edge detection method and system. Background technique [0002] Ultrasonic flaw detection is a method for inspecting parts defects by using ultrasonic energy to penetrate deep into the metal material and pass from one section to another section, reflecting at the edge of the interface to inspect parts defects. Inside the metal, when a defect and the bottom surface of the part are encountered, reflected waves will be generated respectively, and pulse waveforms will be formed on the fluorescent screen. Based on these pulse waveforms, the position and size of the defect can be judged. [0003] Due to the limitation of the transmission power of the ultrasonic probe, the minimum diameter of the ultrasonic probe is 30 mm, and only defects with a diameter > 20 mm can be identified when scanning the defect area, which causes excessive errors in ultrasonic det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/11G06T7/13
CPCG06T7/0004G06T7/11G06T7/13G06T2207/10132G06T2207/30136
Inventor 王新德王栋王文强王炜钟峰王景贤
Owner 西安维控自动化科技有限公司