Method and apparatus for improving the transmitting and receiving directivity in long-range ultrasonic testing
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United States of America Patent
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Sep 8, 2020
Grant Date -
Nov 8, 2018
app pub date -
Nov 4, 2016
filing date -
Nov 5, 2015
priority date (Note) -
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Abstract
An apparatus for improving transmission directivity according to an embodiment of the present invention includes a phased array probe including a channel 1 transducer and a channel 2 transducer which are arranged at intervals corresponding to a quarter wavelength at a center frequency of a guided wave pulse for long-range ultrasonic testing, and a drive unit which supplies electric pulses with opposite phases to the channel 1 transducer and the channel 2 transducer of the channel 1 transducer and the channel 2 transducer, which is disposed on the front end on the basis of an intended transmission direction, is driven with delay by a time corresponding to a quarter frequency of the center frequency than the other transducer disposed on the rear end.
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