发明名称 |
Directional coupler sensor |
摘要 |
A directional coupler sensor is provided for measuring the moisture content of a substrate, such as hair. The sensor incorporates a high frequency directional coupler having a pair of generally parallel plates defining a coupling gap therebetween. A high frequency signal generator generates an electromagnetic field across the gap with the substrate placed across the coupling gap. The coupled power relates to the moisture content of the substrate. A pressure sensor is provided to ensure that the desired compactness of the substrate across the coupling gap is achieved to obtain accurate, reliable and consistent results.
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申请公布号 |
US6854322(B2) |
申请公布日期 |
2005.02.15 |
申请号 |
US20030442503 |
申请日期 |
2003.05.21 |
申请人 |
THE PROCTER & GAMBLE COMPANY |
发明人 |
SHERMAN FAIZ FEISAL;GARTSTEIN VLADIMIR;KERR KENDAL WILLIAM;MEYER HERMAN WILLIAM;MCCURDY JIM ALLEN |
分类号 |
A45D7/00;A45D24/10;A45D44/00;A46B17/00;G01N22/00;G01N22/04;G01N33/48;G01N33/483;(IPC1-7):G01N25/56;G01R27/08 |
主分类号 |
A45D7/00 |
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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