A multimodal signal detection method and device for rail defects

A signal detection, multi-modal technology, applied in optical testing of flaws/defects, analysis of solids using sonic/ultrasonic/infrasonic waves, etc., can solve the problems of limited detection range and low detection efficiency, and achieve the goal of overcoming the low efficiency of comprehensive scanning. Effect

Active Publication Date: 2017-12-08
HARBIN INST OF TECH AT WEIHAI
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  • Claims
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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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  • A multimodal signal detection method and device for rail defects
  • A multimodal signal detection method and device for rail defects
  • A multimodal signal detection method and device for rail defects

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Embodiment Construction

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0046] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof.

[0047]Those ski...

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Abstract

The present invention provides a multi-modal signal detection method and device for rail defects. The method includes: obtaining optical signals of the surface area to be tested of the rail to be tested, and determining the spatial distribution information of the surface damage of the rail according to the optical signals. Surface damage type; obtain the photoacoustic signal of the location area where the rail surface damage is located, and determine the spatial distribution information and shallow damage type of the rail shallow damage according to the photoacoustic signal; obtain the location area of ​​​​the rail shallow damage And the ultrasonic echo signals of deeper areas, and according to the ultrasonic echo signals, determine the spatial distribution information and deep damage types of rail deep damage; according to the spatial distribution information of rail surface, shallow and deep damage, fused optical , photoacoustic and ultrasonic testing data, and perform three-dimensional reconstruction of the rail to be tested. The invention effectively improves the accuracy and efficiency of the detection results, and can display the defects of the rail more intuitively and vividly.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a multi-mode 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 rail 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 gaps, corrosion, etc., 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 characteristics of pure ul...

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Application Information

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Patent Type & Authority Patents(China)
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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