Locomotive wheel inspection with EMAT technology

B. R. Tittmann, S. Jayaraman, R. Alers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper reports on results starting with laboratory research, developing a prototype and transferring the capability to a railroad service center. Inspection of locomotive wheels is often done by magnetic particle/ dye penetrant technique, which requires careful cleaning of the surfaces and can be time consuming. Using a non-contact sensor such as the electromagnetic acoustic transducer EMAT, to scan the wheels in an automated manner offers greater inspection speed at lower manpower. This paper reviews the basic concept of EMATs, introduces a recently developed technique for simulating EMAT performance by Finite Element calculation and features bench top results of waveform acquisition and signal-to-noise ratio dependence on lift-off. Next presented are calibration results for spark-eroded flaws in wheel sections for a variety of locations and sizes. Finally data are on flaw detection in a railroad service facility on several locomotives with wheels spinning at speeds up to 40 meters/minute. Results for both artificial and actual flaws are shown. In conclusion, the EMAT non-contact sensor provides improved inspection for locomotive wheels without their removal.

Original languageEnglish (US)
Title of host publicationStructural Health Monitoring and Intelligent Infrastructure - Proceedings of the 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure
Pages683-686
Number of pages4
StatePublished - Dec 1 2003
Event1st International Conference on Structural Health Monitoring and Intelligent Infrastructure, SHMII-1'2003 - Tokyo, Japan
Duration: Nov 13 2003Nov 15 2003

Publication series

NameStructural Health Monitoring and Intelligent Infrastructure - Proceedings of the 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure
Volume1

Other

Other1st International Conference on Structural Health Monitoring and Intelligent Infrastructure, SHMII-1'2003
CountryJapan
CityTokyo
Period11/13/0311/15/03

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Architecture

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  • Cite this

    Tittmann, B. R., Jayaraman, S., & Alers, R. (2003). Locomotive wheel inspection with EMAT technology. In Structural Health Monitoring and Intelligent Infrastructure - Proceedings of the 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure (pp. 683-686). (Structural Health Monitoring and Intelligent Infrastructure - Proceedings of the 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure; Vol. 1).