发明名称 |
Penetration sensor |
摘要 |
A penetration sensor is disclosed which contains first and second transducers sandwiched around a layer which capacitively isolates the individual transducers. This sensing arrangement allows for the operational state of the sensor to be tested by applying an interrogation signal to each of the transducers.
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申请公布号 |
US4954811(A) |
申请公布日期 |
1990.09.04 |
申请号 |
US19880277373 |
申请日期 |
1988.11.29 |
申请人 |
PENNWALT CORPORATION |
发明人 |
CHATIGNY, JOSEPH V.;SMITH, PETER R. |
分类号 |
G01L1/16;G08B13/191;G08B13/20 |
主分类号 |
G01L1/16 |
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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