Identifying unit for object |
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| 申请号 | JP11544977 | 申请日 | 1977-09-26 | 公开(公告)号 | JPS5448497A | 公开(公告)日 | 1979-04-17 |
| 申请人 | Nippon Signal Co Ltd:The; | 发明人 | SATOU RIYOUSUKE; | ||||
| 摘要 | PURPOSE:To establish the object identifying unit which is easy for the manufacturing of detection coil and stable in the operation, by constituting the oscillation circuit through the use of the detection coil of two terminal circuit and the negative impedance conversion circuit. CONSTITUTION:Resistors R1 and R2 are connected to the operational amplifier OA, constituting negative impedance conversion unit Nic and the impedance Zo(Ro, Xo) is connected. When Xo is only inductance Lo, f-Xin represents linear relation. The relation of X-f of the detection coil DC is greatly varied around the resonant frequency of when the coupling coefficient K of the identified object to the resonance coil is increased 0 | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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