发明名称 |
Capacitive proximity sensor and proximity sensing method |
摘要 |
A capacitive proximity sensor (100) comprises a sensor unit (10) and a sense circuit unit (20). The sensor unit (10) includes a sensor electrode (11), a shield electrode (12) and an auxiliary electrode (13). The sensor electrode (11) is connected to a C-V conversion circuit (21) and the shield electrode (12) is connected to a shield drive circuit (24). The auxiliary electrode (13) is connected via a change-over switch (30) to the C-V conversion circuit (21) or the shield drive circuit (24). The capacitance values (C1, C2) switched by the change-over switch (30) and detected at the C-V conversion circuit (21) are compared to arbitrarily set a range of a sense region on the sensor electrode (11). |
申请公布号 |
US8692565(B2) |
申请公布日期 |
2014.04.08 |
申请号 |
US20080677907 |
申请日期 |
2008.10.06 |
申请人 |
TOGURA TAKESHI;FUJIKURA LTD. |
发明人 |
TOGURA TAKESHI |
分类号 |
G01R27/00;G01R27/26;H03K17/955 |
主分类号 |
G01R27/00 |
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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