发明名称 |
Minute change detecting system |
摘要 |
A minute change detecting system comprises sensor means which changes its electrical constant according to a physical change of an object under measurement to affect the oscillation frequency of at least one of two high-frequency oscillators, and mixer means for producing a beat frequency signal from the output oscillation frequencies of the two oscillators, thereby to detect the physical change.
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申请公布号 |
US4227182(A) |
申请公布日期 |
1980.10.07 |
申请号 |
US19780933685 |
申请日期 |
1978.08.15 |
申请人 |
OGASAWARA, HIROOMI;OGASAWARA, MASAOMI |
发明人 |
OGASAWARA, HIROOMI;OGASAWARA, MASAOMI |
分类号 |
G01D5/243;G01D5/12;G01D5/20;G01D5/24;(IPC1-7):G01R27/26;G01L1/14;G08C19/10 |
主分类号 |
G01D5/243 |
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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