发明名称 |
Process for measuring the electrical resistance of a resistive body for example for checking the conformity of a liquid product and devices for carrying out such a process |
摘要 |
Measuring the electrical resistance of a resistive body, in particular a reservoir containing a printing product such as ink. According to the invention, the resistive body is used to define a capacitance arrangement formed from a capacitive branch which includes a capacitor electrically connected to the resistive body and this is incorporated in a resonant circuit that includes a variable capacitor. The resonant circuit is supplied with a fixed frequency, and as the capacitance of the variable capacitor is varied the peak of the signal is sought. The amplitude of the peak is representative of the resistance of the resistive body.
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申请公布号 |
US6407557(B1) |
申请公布日期 |
2002.06.18 |
申请号 |
US19990383625 |
申请日期 |
1999.08.26 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
COUDRAY PASCAL;FROGER MARIE-HéLèNE;LORGEOUX MICKAëL;TRUFFAUT CHRISTOPHE |
分类号 |
B41J2/175;G01F23/24;G01N27/22;G01R19/04;G01R27/22;H03J3/18;(IPC1-7):G01R27/08;G01R27/26 |
主分类号 |
B41J2/175 |
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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