Patent ID: 6192760
Filing Date: 2001-02-27
Classification: G01N

Abstract:
A transmitting and receiving switching circuit for an electromagnetic acoustic transducer (EMAT) comprising:an EMAT coil;a means for resonating the inductance and resistance of the EMAT coil at a desired frequency, connected to the EMAT coil;a first means for selectively redirecting an electrical current, connected to the EMAT coil;a second means for selectively redirecting the electrical current, connected to the first means for selectively redirecting the electrical current;a means for resisting the electrical current, connected to the first means for selectively redirecting the electrical current and connected to the second means for selectively redirecting the electrical current;a transformer, connected to the second means for selectively redirecting the electrical current;an input receiver for detecting electrical signals, having an input port and connected to the transformer; anda voltage, selectively applied to the transformer and to the means for resisting the electrical current.