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Device and method for flaw detection of small crawler-type rails based on three-way ultrasonic diffraction

A flaw detection device, crawler-type technology, applied in the direction of measuring devices, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, using sound waves/ultrasonic waves/infrasonic waves for material analysis, etc., can solve the problem of low detection rate, low efficiency, and difficulty in improving flaw detection speed And other issues

Inactive Publication Date: 2013-05-15
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] Aiming at some deficiencies existing in the field of ultrasonic rail flaw detection technology, such as difficult to increase flaw detection speed, low efficiency, low detection rate of defects perpendicular to the detection surface, and poor quantitative detection performance, the present invention proposes a three-dimensional ultrasonic diffraction based Small crawler rail flaw detection device and method

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  • Device and method for flaw detection of small crawler-type rails based on three-way ultrasonic diffraction
  • Device and method for flaw detection of small crawler-type rails based on three-way ultrasonic diffraction
  • Device and method for flaw detection of small crawler-type rails based on three-way ultrasonic diffraction

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Embodiment

[0051] Such as figure 1 As shown, the three-way crawler driving system of the present invention is composed of three sets of crawlers, wherein the crawler located above the rail 3 is the main crawler 1, and the crawlers on the left and right sides are auxiliary crawlers 2, and the main crawler 1 is responsible for driving the flaw detection trolley March. The three sets of crawlers are embedded with several ultrasonic probes in the direction along the direction of the rail, which are respectively attached to the top of the rail 3 and the left and right sides during detection. According to the length of the track along the rail, the track embedded with the ultrasonic probe is divided into several detection sub-areas (assumed to be N), in which each side of the track in each sub-area is equipped with an ultrasonic probe, because there are 3 groups of tracks, so the division Each sub-area is equipped with 3 ultrasonic probes in three directions. On a section perpendicular to th...

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Abstract

The invention provides a device and a method for flaw detection of small crawler-type rails based on three-way ultrasonic diffraction. The device provided by the invention comprises a three-way crawler-type travel system, an ultrasonic detection master control system and a plurality of three-way ultrasonic diffraction detection sub-systems, wherein, all the three-way ultrasonic diffraction detection sub-systems and the ultrasonic detection master control system are configured on the three-way crawler-type travel system, and the three-way detector of each three-way ultrasonic diffraction detection sub-system is embedded in the crawler of the three-way crawler-type travel system. The method provided by the invention comprises the following steps: by means of the operations of all the three-way ultrasonic diffraction detection sub-systems and the ultrasonic detection master control system, carrying out crawler-type flaw detection, thus largely increasing the data sampling time in an areaof the rail at the same detection speed; and simultaneously based on the three-way structure, carrying out flaw estimation by means of the propagation sound path of diffracted waves so as to be not sensitive to the energy and amplitude of received echo pulses, thereby still ensuring accurate work in the detection condition with large energy attenuation.

Description

technical field [0001] The invention belongs to the technical field of rail non-destructive testing, in particular to a rail flaw detection device and method using ultrasonic diffraction and three-way crawler rolling. Background technique [0002] With the rapid development of railway transportation, the railway transportation lines are getting busier and the traffic density is also increasing. While the rails on the transportation line are in the process of undertaking heavy transportation tasks, due to the friction, extrusion, bending and impact of the train on the rails, the rails will inevitably produce various damages. For visible external damages such as rust , rail head crushing, peeling off quickly, side grinding, etc. can be dealt with in time; the nuclear damage caused by residual inclusions and white spots inside the rail cannot be recognized by naked eyes, and these internal damages remain in the rail running day and night for a long time It will cause serious t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/265
Inventor 韦岗吴怡梁永麟张军
Owner SOUTH CHINA UNIV OF TECH
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