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Multi-mode signal detection method and multi-mode signal detection system for rail defects

A signal detection, multi-modal technology, applied in the direction of optical testing flaws/defects, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve the problems of limited detection range and low detection efficiency, and overcome the low efficiency of comprehensive scanning Effect

Active Publication Date: 2015-11-25
HARBIN INST OF TECH AT WEIHAI
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Problems solved by technology

[0004] In view of the above problems, the present invention provides a multi-modal signal detection method and device for rail defects to solve the problems of limited detection range and low detection efficiency in the existing non-destructive testing technology for rail surface defect detection technology

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  • Multi-mode signal detection method and multi-mode signal detection system for rail defects

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Embodiment Construction

[0045] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

[0046] It will be understood by those skilled in the art that the singular forms "a", "an", "the" and "the" as used herein can include the plural forms as well, unless expressly stated otherwise. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of stated features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, Intege...

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Abstract

The invention provides a multi-mode signal detection method and a multi-mode signal detection system for rail defects. The method includes the following steps: an optical signal of an area to be detected on the surface of a rail to be detected is acquired, and according to the optical signal, the spatial distribution information and surface injury type of rail surface injuries are determined; an opto-acoustic signal of the location area where the rail surface injuries is acquired, and according to the opto-acoustic signal, the spatial distribution information and shallow injury type of shallow rail injuries are determined; ultrasonic echo signals of the location area where the shallow rail injuries and a deeper area are acquired, and according to the ultrasonic echo signals, the spatial distribution information and deep injury type of deep rail injuries are determined; according to the spatial distribution information of the surface, shallow and deep of rail injuries, in combination with the optical, opto-acoustic and ultrasonic detection data, the rail to be detected is reconstructed three-dimensionally. The invention effectively increases the precision and efficiency of detection results, and can more visually and vividly show the defects existing in the rail.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a multimodal signal detection method and device for rail defects. Background technique [0002] Ultrasonic technology has been widely and maturely applied in the field of non-destructive testing, and photoacoustic imaging technology, as a non-destructive testing technology developed in recent years, has also been fully developed. In the defect detection of high-speed railway rails, ultrasonic technology makes full use of the high penetration of ultrasonic signals, as well as the difference in acoustic impedance between rails and damaged voids, rust, etc. to sound waves, and uses probes to emit ultrasonic beams and obtain echo signals. The signal is analyzed and processed to judge and identify the defect information of the rail. Photoacoustic imaging technology combines the high contrast characteristics of pure optical imaging and the high penetration characterist...

Claims

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Application Information

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IPC IPC(8): G01N29/06G01N21/88
Inventor 孙明健程星振沈毅王艳冯乃章章欣
Owner HARBIN INST OF TECH AT WEIHAI
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