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System and method for the detection of faults in rails

A track and defect technology, applied in the field of track defect detection, can solve the problems of water not being delivered to the desired position, and the test quality being deteriorated.

Active Publication Date: 2009-05-27
SPERRY RAIL INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can be problematic when less water is available
Additionally, excess water around the sides of the transducer (when not present between the transducer and the rail) can produce spurious ultrasonic signals that degrade the quality of the test
There is also the problem of water not being delivered to the desired location when the relative velocity of the transducer to the track is high, or when there is a high velocity crosswind in the area of ​​the transducer and track

Method used

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  • System and method for the detection of faults in rails

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Embodiment Construction

[0041] Figure 1 shows a system for detecting defects in rails according to the invention. The system is generally indicated by reference numeral 1 and includes: an ultrasonic source for transmitting ultrasonic waves onto the track 12; a detector for detecting ultrasonic waves reflected or scattered by the track (or defects therein); and a mist generator 3 , which is arranged to expose the rail and the ultrasonic transducer 2 to a mist of liquid in use, so that an ultrasonic transmission interface between the rail 12 and the ultrasonic transducer 2 can be formed, thereby enabling ultrasonic transmission to the rail 12 and Ultrasonic waves are received from track 12. The transducer 2 serves as an ultrasonic source and an ultrasonic detector.

[0042] The system is attached to a wheeled railway vehicle traveling on the track in the direction of arrow 13 . The ultrasonic transducer is substantially in contact with the rail, however, an air gap will appear between the rail 12 and t...

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Abstract

A system (1) for the detection of defects in rails (12), the system comprising a source of ultrasonic waves for emitting ultrasonic waves onto a rail, a detector for detecting ultrasonic waves reflected or otherwise scattered by the rail or defects therein and a mist generator (3) arranged, in use, to expose one or both of the rail and source of ultrasonic waves to a mist of liquid, thus enablingthe formation of an ultrasound-transmissive interface between the rail and the source of ultrasonic waves.

Description

technical field [0001] The invention relates to the detection of track defects, especially defects in railway tracks. Background technique [0002] It is known to inspect rails for defects using ultrasonic waves emitted and received by ultrasonic transducers. The technique relies on transmitting ultrasonic waves to and receiving ultrasonic waves from the track being inspected. An important part of the path from an ultrasonic transducer is the interface between this transducer and the track, because if there is an air layer between the track and the transducer, even if this air layer is very thin, the transmission of ultrasonic waves Also almost completely blocked. Therefore, a means must be provided to prevent air from entering this interface region. [0003] Air ingress is usually prevented by pouring water onto the track, which forms an ultrasonic transmission layer between the track and the transducer. Typically, water is directed onto the track from the open end of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/28
CPCG01N29/28G01N2291/101G01N2291/2623B61K9/10
Inventor 罗伯特·莱·克劳科尔贾斯廷·詹姆士·罗伯特·斯特劳德
Owner SPERRY RAIL INT