发明名称 |
Ultrasonic Measurement Method, Ultrasonic Measurement Apparatus, and Ultrasonic Sensor |
摘要 |
An ultrasonic measurement method and an ultrasonic measurement apparatus are capable of performing an inspection for a short time with a high SN ratio and a small variation (that depends on an inspection direction) in sensitivity in a process for detecting a defect in all directions at 360 degrees using a matrix array sensor without performing mechanical scanning in all directions, while reducing noise that is caused by a bottom surface echo. An element selecting circuit selects a group of a plurality of ultrasonic transducer elements for transmission from among ultrasonic transducer elements that constitute a two-dimensional array sensor so that the ultrasonic transducer elements for selected for transmission are arranged in line symmetry with respect to a first line symmetric axis to set the group selected for transmission. The element selecting circuit selects a group of a plurality of ultrasonic transducer elements for reception so that the ultrasonic transducer elements selected for reception are arranged in line symmetry with respect to a second line symmetric axis that is perpendicular to the first line symmetric axis to set the group selected for reception. A transmitting element selector selects, as transmitting elements, the ultrasonic transducer elements set by the element selecting circuit. A receiving element selector selects, as receiving elements, the ultrasonic transducer elements set by the element selecting circuit.
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申请公布号 |
US2010251821(A1) |
申请公布日期 |
2010.10.07 |
申请号 |
US20100754264 |
申请日期 |
2010.04.05 |
申请人 |
HITACHI-GE NUCLEAR ENERGY, LTD. |
发明人 |
MIZOTA HIROHISA;KONO NAOYUKI;BABA ATSUSHI |
分类号 |
G01N29/04 |
主分类号 |
G01N29/04 |
代理机构 |
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地址 |
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