发明名称 |
Signal measurement and processing method and apparatus |
摘要 |
A proximity sensor for sensing the proximity of a target comprising: an electrical component for sensing the proximity of the target, said electrical component having electrical properties that vary with the proximity of the target; an impedance component (21) having a known impedance and a first end connected to a first end of said electrical component; a switch (31) connected to switch between said first end of said impedance component (21) and a second end of said impedance component (21); a signal generator connected to said second end of said impedance component (21) for generating an electrical signal for application to the impedance component and electrical component; an analogue-to-digital converter for receiving an electrical signal and for generating a digital signal; and a processor connected to the analogue-to-digital converter for receiving a digital voltage signal and for generating a proximity signal, wherein said processor (23) is adapted to control said switch to switch (31) to connect to said first and second ends of said impedance component sequentially. |
申请公布号 |
GB2411481(B) |
申请公布日期 |
2007.11.14 |
申请号 |
GB20040004408 |
申请日期 |
2004.02.27 |
申请人 |
ULTRA ELECTRONICS LIMITED |
发明人 |
IAN MCGREGOR STOTHERS;ANDREW LANGLEY |
分类号 |
G01R27/02;G01R27/14;G01R35/00 |
主分类号 |
G01R27/02 |
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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