发明名称 |
Moisture detection apparatus and method |
摘要 |
A sensor to detect the presence of water or moisture in bulk materials includes a standard circuit board and a three element transmission line. The sensor electronics include an oscillator responsive to a direct current voltage supply which provides a square wave voltage signal. The sensor electronics further include a phase detector which detects the difference in phase between the reference square wave voltage signal and a signal provided to the transmission line buried in a medium. The phase difference is proportional to the dielectric constant of the medium surrounding the transmission line.
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申请公布号 |
US6904789(B2) |
申请公布日期 |
2005.06.14 |
申请号 |
US20010905761 |
申请日期 |
2001.07.13 |
申请人 |
DECAGON DEVICES, INC. |
发明人 |
CAMPBELL GAYLON S.;GREENWAY WARREN C. |
分类号 |
G01N27/22;(IPC1-7):G01N5/02 |
主分类号 |
G01N27/22 |
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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