发明授权
- 专利标题： Electrical moisture sensor
- 专利标题（中）： 电湿度传感器
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申请号： US104738申请日： 1979-12-18
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公开(公告)号： US4288742A公开(公告)日： 1981-09-08
- 发明人: John E. Walsh
- 申请人： John E. Walsh
- 申请人地址： NH Hanover NH Hanover
- 专利权人： Dartmouth College,Walsh; John E.
- 当前专利权人： Dartmouth College,Walsh; John E.
- 当前专利权人地址： NH Hanover NH Hanover
- 主分类号： G01N27/22
- IPC分类号： G01N27/22 ; G01R27/26
摘要：
A moisture sensor including a probe formed with a first ring of spines extending in parallel outward from a base and a second ring of spines extending in parallel outward from the base separated and insulated from the first ring, the spines forming an effective coaxial capacitor and being insertable into material to be sensed and an RC bridge circuit, preferably a Wien bridge connected to the rings to measure the impedance of the material.
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