发明名称 |
ELECTROMAGNETIC ULTRASONIC APPARATUS |
摘要 |
First and second magnetic poles are provided, which have end surfaces brought close and in opposition to a material to be examined. These magnetic poles are magnetized by a DC exciter coil such that the magnetic poles have opposite polarities. The first magnetic pole is provided at its end surface with a pair of cumulatively connected transmitting coils, and the second magnetic pole is provided at its end surface with a pair of differentially connected receiving coils. The transmitting coils are connected to a pulser which generates a pulse current, and the receiving coils are connected to a differential amplifier. An electromagnetic ultrasonic wave generated by the transmitting coils are received by the receiving coils, amplified by the differential amplifier, and thereafter supplied to a synchroscope and an automatic detector. |
申请公布号 |
DE3069797(D1) |
申请公布日期 |
1985.01.24 |
申请号 |
DE19803069797 |
申请日期 |
1980.08.22 |
申请人 |
HITACHI, LTD.;NIPPON STEEL CORPORATION |
发明人 |
SATO, ICHIYA;MIYAGAWA, KAZUO;SASAKI, YUKIHITO;KAWAMURA, KOHJI;SATO, SHUICHI;SASAKI, SOHJI;KUBOTA, JUN;ITO, SUSUMU |
分类号 |
G01N29/04;G01N29/24;G10K15/04;(IPC1-7):G01N29/04 |
主分类号 |
G01N29/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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