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Nondestructive testing method for internal defects of hydraulic pipeline of shield tunneling machine

A technology for hydraulic pipelines and internal defects, which is applied in the field of shield machines, can solve problems such as missed and false detections, and achieve the effects of avoiding missed and false detections, clear defect targets, and easy processing

Inactive Publication Date: 2020-08-04
CHINA RAILWEY ENG SERVICE CO LTD
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Problems solved by technology

[0005] Aiming at the problem that in the prior art, when the infrared image is used to detect the internal defects of the hydraulic pipeline of the shield machine, the small-sized defects will cause missed detection and false detection. The present invention provides a non-destructive detection method for the internal defects of the hydraulic pipeline of the shield machine. , the purpose of which is to: improve the accuracy of the internal defect detection of the hydraulic pipeline of the shield machine, and prevent missed and false detections

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  • Nondestructive testing method for internal defects of hydraulic pipeline of shield tunneling machine

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[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without...

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Abstract

The invention discloses a nondestructive testing method for internal defects of a hydraulic pipeline of a shield tunneling machine, and belongs to the technical field of shield tunneling machines. Theproblems that in the prior art, when the internal defects of a hydraulic pipeline of the shield tunneling machine are detected through infrared images, missing detection and false detection can be caused to the small-size defects are solved. The technical scheme of the invention is as follows: an excitation source heats the hydraulic pipeline; the shooting angle and position of an infrared thermal imager are adjusted, collected data is transmitted to a computer, collected image data is processed and analyzed, namely graying, median filtering, sharpening processing, edge extraction and color inversion processing are carried out on an image, and then whether defects exist in the hydraulic pipeline or not and the shapes and positions of the defects can be obtained. According to the invention, the detection accuracy is improved, and missing detection and false detection are avoided. The method can quickly judge whether defects exist in the hydraulic pipeline of the shield tunneling machine or not, does not damage the pipeline, and is suitable for detecting the hydraulic pipeline of the shield tunneling machine.

Description

technical field [0001] The invention belongs to the technical field of shield machines, and in particular relates to a non-destructive detection method for internal defects of a hydraulic pipeline of a shield machine. Background technique [0002] The defects inside the hydraulic pipeline of the shield machine mainly include cracks and dents. At present, the detection of the life of the hydraulic pipeline of the shield machine is mainly through the appearance inspection, but the appearance inspection cannot find the internal defects of the hydraulic pipeline. The danger posed by defects is the most serious. [0003] The transmission of temperature inside the hydraulic pipeline is regular, and the existence of defects will cause differences in temperature distribution. Different defects cause different differences, and different degrees of defects will also cause differences in temperature distribution. Therefore, in theory, it is feasible to heat the hydraulic pipeline thro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/73G06T5/00G01N21/88
CPCG06T7/0004G06T7/73G01N21/8851G06T2207/10024G06T2207/10048G06T2207/20032G06T2207/20192G01N2021/8887G06T5/73G06T5/70
Inventor 邹景军李少康孙楠楠谭友荣于遵博薛建国
Owner CHINA RAILWEY ENG SERVICE CO LTD
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