发明授权
- 专利标题: 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
- 专利标题(中): 用于测量电阻体的电阻的方法,例如用于检查液体产品的一致性和用于进行这种处理的装置
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申请号: US09383625申请日: 1999-08-26
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公开(公告)号: US06407557B1公开(公告)日: 2002-06-18
- 发明人: Pascal Coudray , Marie-Hélène Froger , Mickaël Lorgeoux , Christophe Truffaut
- 申请人: Pascal Coudray , Marie-Hélène Froger , Mickaël Lorgeoux , Christophe Truffaut
- 优先权: FR9810774 19980827; FR9810773 19980827
- 主分类号: G01R2708
- IPC分类号: G01R2708
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.