G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 29/04 (2006.01) G01N 29/08 (1995.01) G01N 29/20 (1995.01)
Patent
CA 2151116
A flaw detection method and arrangement utilizes electromagnetic acoustic transducers (EMATs) which ultrasonically test a material for cracks or flaws. Four EMATs are used in a pitch-catch configuration, i.e. two pairs of EMAT transmitters and receivers. The EMAT transmitters and receivers are arranged such that a first EMAT transmitter is located on the surface diagonally across from a first EMAT receiver and a second EMAT transmitter is located diagonally across from a second EMAT receiver. The first and second EMAT transmitters transmit ultrasonic signals to the first and second EMAT receivers respectively; and these ultrasonic signals are transmitted orthogonal to each other. A pulser/receiver is operatively connected to the first and second EMAT transmitters and the first and second EMAT receivers for inducing the EMAT transmitters to propagate their respective waves. The pulser/receiver also receives the signal transmitted through the material after being received by the first and second EMAT receivers. A power source is operatively connected to the pulser/receiver for powering the arrangement; and a computer or oscillator is operatively connected to the pulser/receiver for recording and displaying the signals.
Latimer Paul J.
Maclauchlan Daniel T.
Babcock And Wilcox Company (the)
Rolston George A.
LandOfFree
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