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PHASED ARRAY ULTRASONIC INSPECTION OF RAIL WHEEL

IP.com Disclosure Number: IPCOM000240580D
Publication Date: 2015-Feb-10
Document File: 6 page(s) / 531K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention proposes a technique to test tread and face of rail wheels using a phased array ultrasound probe. The proposed technique implements both tread scan and back-wall monitoring simultaneously. According to the technique describe herein, during back-wall monitoring with the phased array probe, a user selects a part of the back wall that needs to be monitored for defect detection.

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This is the abbreviated version, containing approximately 52% of the total text.

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PHASED ARRAY ULTRASONIC INSPECTION OF RAIL WHEEL

BACKGROUND

The present invention relates generally to inspection of a rail wheel and more particularly to a technique for inspection of rail wheels using phased array ultrasound.

Generally, nondestructive testing techniques are used to inspect objects for detecting and analyzing defects in the objects. One method of nondestructive testing employs ultrasonic signals.

Ultrasonic testing may be performed with a single element probe or a phased array probe. The single element probe is often mounted on a wedge to direct signals at a desired angle to inspect different regions of the object. A conventional technique utilizes two transducers in various fixed locations in a test stand. Transducers are also provided around the tread circumference. A refinement to the test stand utilizes four and then eight transducers in a similar configuration to provide complete analysis of the wheel perimeter. However, in order to inspect full volume of the object, it may be necessary to scan the object several times using different angled wedges, which becomes time consuming.

The phased array ultrasonic probe has multiple electrically and acoustically independent ultrasonic transducers mounted in a single housing. By varying the timing of the electrical pulses applied to the ultrasonic transducers, a phased array ultrasonic probe can generate ultrasonic beams at different angles, allowing the phased array ultrasonic probe to direct the ultrasonic beam at different angles through the object and detect defects using a single wedge .

It would be desirable to have an efficient technique to inspect rail wheel.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a graphical representation of 1 mm flat bottom hole (FBH) which is 10 mm deep.

Figure 2 is a graphical representation of 1 mm FBH which is 6 mm deep.

Figure 3 depicts dynamic scan results.


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Figure 4 depicts results of 1 mm FBH in dynamic scan.

Figure 5 depicts a back wall scan.

DETAILED DESCRIPTION

The present invention proposes a technique to test tread and face of rail wheels using a phased array ultrasound probe. The proposed technique implements both tread scan and back-wall monitoring.

The tread scan i...