DEVELOPMENT OF RESEARCH ON ELECTROMAGNETIC ACOUSTIC TRANSDUCER FOR NONDESTRUCTIVE TESTING

An electromagnetic acoustic transducer (EMAT) can produce and receive ultrasonic waves though electromagnetic coupling. The EMAT is characteristic of non-contact and being needing no coupling medium, so it is specially concerned by researchers on nondestructive testing and evaluation. The physical principle of EMAT was presented, and the research status of mathematics modeling, equipment design and engineering applications of EMAT were introduced.