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.
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 代理人
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