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1. (WO2015045081) NON-DESTRUCTIVE MEASUREMENT DEVICE AND METHOD USING ULTRASOUND

Pub. No.:    WO/2015/045081    International Application No.:    PCT/JP2013/076180
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Sat Sep 28 01:59:59 CEST 2013
IPC: G01N 29/04
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: MIZOTA Hirohisa
溝田 裕久
NAGASHIMA Yoshiaki
永島 良昭
NAKAHATA Kazuyuki
中畑 和之
Title: NON-DESTRUCTIVE MEASUREMENT DEVICE AND METHOD USING ULTRASOUND
Abstract:
The purpose of the present invention is to provide a non-destructive measurement device that uses ultrasound and makes it possible to simply and quickly measure the crystal growth direction of an anisotropic structure comprising a single crystal material or unidirectionally solidified material. To achieve the above purpose, the present invention is a non-destructive measurement device that uses ultrasound, is for an acoustically anisotropic structure, and is characterized by being provided with an array sensor for transmitting ultrasound to the structure and receiving reflected ultrasound, a delay time creation unit for creating delay times for focusing ultrasound on a prescribed position for each of a plurality of assumed crystal growth angles of the structure, an ultrasound generation and detection device for controlling a signal for transmitting ultrasound from the array sensor or receiving reflected ultrasound on the basis of the delay times, a waveform intensity calculation unit for calculating intensities for specific echoes from the waveforms acquired on the basis of the delay times, and a crystal growth angle determination unit for determining a crystal growth angle on the basis of the relationship between the assumed crystal growth angles and the specific echo intensities.