| 发明名称 | Method for checking an antenna coil | ||
| 摘要 | A method for contactlessly checking the functionality of an antenna coil for a portable data carrier comprises the steps of exciting the antenna coil, detecting the free, damped oscillation of the antenna coil in response to the excitation, and evaluating the detected free, damped oscillation. The excitation of the antenna coil is effected inductively through a pulsed magnetic field, which may be generated by a single direct-current pulse, such as a Dirac pulse, by means of an exciting coil attached to a pulse generator. The detection of the oscillation of the antenna coil is effected through a measuring antenna, and the evaluation is effected by means of an evaluation device connected to the measuring antenna. | ||
| 申请公布号 | US9316674(B2) | 申请公布日期 | 2016.04.19 |
| 申请号 | US201214342869 | 申请日期 | 2012.09.05 |
| 申请人 | GIESECKE & DEVRIENT GMBH | 发明人 | Baldischweiler Michael;Finkenzeller Klaus;Bohn Carsten |
| 分类号 | G01R29/10;G06K7/00;H01Q1/22;H01Q7/00 | 主分类号 | G01R29/10 |
| 代理机构 | Workman Nydegger | 代理人 | Workman Nydegger |
| 主权项 | 1. A method for checking a functionality of an antenna coil for a contactlessly communicating portable data carrier, the method comprising the steps of: exciting the antenna coil to oscillate, wherein the antenna coil of the portable data carrier is inductively excited by only a single magnetic pulse; detecting an oscillation and an oscillation decay of the antenna coil induced by the single magnetic pulse; and determining the functionality of the antenna coil by evaluating the detected oscillation and oscillation decay of the antenna coil, wherein, upon the evaluation of the oscillation and the oscillation decay of the antenna coil, the resonance frequency of the antenna coil or a quality factor of the antenna coil is determined. | ||
| 地址 | Munich DE | ||