METHOD FOR INSTALLING PROBES, AND METHOD FOR DRIVING TRANSMISSION PROBE

WIPO Patent Application WO/2019/151474

A1

A transmission probe (1) for transmitting a guide wave that advances along the major-axis direction of a long member (3), and a reception probe (2) for receiving a guide wave resulting when the aforementioned guide wave is reflected from a prescribed location on the long member (3), are installed on the long member (3). The guide wave received by the reception probe (2) includes a guide wave forming a second signal that is noise of a desired first signal. The guide wave forming the second signal has a node in a circumferential-direction distribution of specific-direction displacement of the circumferential surface of the long member (3), and the guide wave transmitted by the transmission probe (1) is formed so that the specific-direction displacement of the guide wave forming the second signal is zero at a specific circumferential-surface position on the long member (3). This method for installing probes is provided with: a step for installing a transmission probe (1) for transmitting a guide wave on the circumferential surface of a long member (3); and a step for installing a reception probe (2) at a position on the circumferential surface of the long member (3) at which specific-direction displacement of a guide wave forming a second signal is zero.

JP2005315766	ULTRASONIC FLAW DETECTION METHOD AND ULTRASONIC FLAW DETECTOR
WO/2012/082477	NONDESTRUCTIVE TEST FOR FLEXIBLE COMPOSITES

SHOJI MASANARI (JP)
OKA SOICHI (JP)

PCT/JP2019/003598

August 08, 2019

February 01, 2019

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NIPPON TELEGRAPH & TELEPHONE (JP)

G01N29/04; G01N29/34; G01N29/36

JP2013088118A	2013-05-13
JP2007107885A	2007-04-26
JP2009109390A	2009-05-21
US20140202249A1	2014-07-24

MIYOSHI Hidekazu et al. (JP)

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