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High-quality imaging method and system for bolt ultrasonic detection

A technology of ultrasonic detection and imaging method, which is applied in processing the response signal of detection, using sonic/ultrasonic/infrasonic waves to analyze solids, etc., which can solve the problem that imaging resolution and signal-to-noise ratio are difficult to meet detection requirements, identify and analyze interference, defect leakage, etc. It can solve problems such as detection and misjudgment, and achieve good promotion and application prospects, improve defect detection capabilities, and suppress deformation wave echoes.

Pending Publication Date: 2022-04-12
JIANGXI CHANGHE AVIATION IND +1
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  • Application Information

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Problems solved by technology

However, due to the complexity of the inside of the bolt, the resolution and signal-to-noise ratio of the image during actual inspection are difficult to meet the inspection requirements, causing certain interference to the inspection personnel when identifying and analyzing the echo of workpiece defects, resulting in missed inspections and misjudgments of defects

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  • High-quality imaging method and system for bolt ultrasonic detection
  • High-quality imaging method and system for bolt ultrasonic detection
  • High-quality imaging method and system for bolt ultrasonic detection

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Embodiment Construction

[0021] In this embodiment, taking the ultrasonic phased array detection of a steel bolt test block as an example, a high-quality imaging method for ultrasonic detection of bolts proposed by the present invention is further described. Such as figure 1 As shown, this scheme uses an ultrasonic detection system to image the specimen. The ultrasonic detection system includes a computer host 1, a display 2, a data acquisition system 3, a transducer connection panel 4 and a linear array transducer 5, wherein the linear array transducer The transducer is connected to the connection panel, and the connection panel is an ultrasonic transmitting / receiving 32-channel interface. The model of the linear array transducer 5 used in this scheme is L5L64-0.6×10-C77, the center frequency of the probe is 5MHz, and the length of the array element is 10mm , the distance between adjacent elements is 0.6mm. The data acquisition system is connected with the host computer and the display via PCI-E, an...

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Abstract

The invention belongs to the field of ultrasonic nondestructive testing, and particularly relates to a high-quality imaging method and system for bolt ultrasonic testing. The imaging method comprises the following steps: determining an approximate position of a bolt side wall crack defect by taking bottom threads and bolt side wall echoes in a phased array ultrasonic fan-shaped scanning image as references; after the defect is found, the position of the movable probe is rotated to adjust the amplitude of the defect and weaken deformation waves generated by reflection and refraction of the side wall of the bolt; an original radio-frequency signal is acquired by using a phased array ultrasonic sector scanning method, and weighting processing is performed on the radio-frequency signal, so that interference of deformation waves on defect echoes is suppressed, and the sensitivity of bolt detection is improved. The method provided by the invention belongs to the field of ultrasonic nondestructive testing, is very suitable for detecting the defects of the bolt, can visually observe the defects on the bolt, and has good popularization and application prospects.

Description

technical field [0001] The invention belongs to the field of ultrasonic nondestructive testing, and mainly relates to a high-quality imaging method and system for ultrasonic testing of bolts. Background technique [0002] As an important part of industrial equipment, bolts are also important connectors of aircraft structures. They are prone to fatigue cracks or corrosion cracks when they operate in complex working environments with high-strength pressure, multiple alternating stress, and high temperature overload for a long time. The non-destructive testing of bolts is very important. At present, the detection bolts are mostly used for visual inspection, magnetic particle inspection, and penetrant inspection. However, when using the above method for detection, the bolts need to be disassembled from the structure and assembled, which has a great impact on the detection, and is easy to cause damage to the bolts during the assembly process. Compared with the above-mentioned d...

Claims

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Application Information

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IPC IPC(8): G01N29/06G01N29/44
CPCY02E30/30
Inventor 黄景兴陈尧孔庆茹马啸啸肖良忠
Owner JIANGXI CHANGHE AVIATION IND
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