EMATS for spot weld examination
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United States of America Patent
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Jun 26, 2001
Issued Date -
N/A
app pub date -
Mar 9, 1999
filing date -
Mar 9, 1999
priority date (Note) -
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Abstract
An EMAT apparatus which non-destructively tests spot welds between two sheets of metal. The apparatus includes a first EMAT coil on one sheet that acts as a transmitter for generating and transmitting an acoustic wave signal toward the spot weld, and a second EMAT coil on the other sheet for receiving the acoustic wave signal and converting the received acoustic wave signal to an electronic signal having a waveform. Electronics and a PC are used to measure at least one parameter of the waveform which is indicative of a characteristic of the spot weld.
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