发明名称 |
Energy trapped piezoelectric resonator liquid sensor |
摘要 |
A liquid sensor mounted on the side wall of a liquid tank for detecting the existence of liquid in the tank. The sensor includes an element which generates a vibration in the direction of its thickness, of energy-trapped type for detecting the existence of liquid. The element consists of electrodes provided on both sides of a piezo-electric substrate, one side of the element for contacting the liquid in the tank being covered with a liquid-proof coating. The existence of liquid is detected from the change in resonance impedance or antiresonance impedance resulting from the liquid contact.
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申请公布号 |
US4565942(A) |
申请公布日期 |
1986.01.21 |
申请号 |
US19840626123 |
申请日期 |
1984.06.29 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
SAKAI, KATSUMI;TOYOSHIMA, ISAO |
分类号 |
G01F23/296;H03H9/17;H03H9/56;(IPC1-7):H01L41/08 |
主分类号 |
G01F23/296 |
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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