发明授权
US5285328A Process for evaluating binary data of a magnetic storage card using
curve patterns
失效
使用曲线模式评估磁存储卡的二进制数据的过程
- 专利标题： Process for evaluating binary data of a magnetic storage card using curve patterns
- 专利标题（中）： 使用曲线模式评估磁存储卡的二进制数据的过程
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申请号： US768720申请日： 1991-10-25
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公开(公告)号： US5285328A公开(公告)日： 1994-02-08
- 发明人: Hubert Behr , Wolfgang Fick , Waldemar Jager
- 申请人： Hubert Behr , Wolfgang Fick , Waldemar Jager
- 申请人地址： DEX Paderborn
- 专利权人： Siemens Nixdorf Informationssysteme AG
- 当前专利权人： Siemens Nixdorf Informationssysteme AG
- 当前专利权人地址： DEX Paderborn
- 优先权： DEX4006426 19900301
- 主分类号： G11B20/12
- IPC分类号： G11B20/12 ; G11B20/14 ; G11B20/22 ; H03M5/14 ; G11B5/09 ; G06K7/08 ; G11B25/04
摘要：
In a process for evaluating binary data stored on the magnetic track of a magnetic storage card (10) in the form of flux changes in accordance with the two-frequency code, a relative movement (v) is produced between the magnetic storage card (10) and an electromagnetic transformer (30) which emits voltage pulses induced by the changes in magnetic flux. The time intervals between the voltage pulses are evaluated in order to obtain the data. To this end, standardization is carried out with uniform preliminary data at the beginning of a scanning operation. The output signal (U) of the electromagnetic transformer (30) is converted to digital values at predetermined times. The digital values are stored in the sequence in which they are stored and evaluated in order to obtain the data.
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