| 发明名称 |
ALARM UNIT USING ULTRASONIC WAVES |
| 摘要 |
PURPOSE:To increase the accuracy for eliminating fixed reflection and to increase the detection area, by enabling to neglect the phase shift due to amplifiers, through assembling a variable gain amplifier to the loop controlling the phase. |
| 申请公布号 |
JPS544100(A) |
申请公布日期 |
1979.01.12 |
| 申请号 |
JP19770068806 |
申请日期 |
1977.06.13 |
| 申请人 |
MATSUSHITA ELECTRIC WORKS LTD |
发明人 |
OOHASHI HIROSHI;INOUE HIRONOBU |
| 分类号 |
G01S7/527;G01S7/536;G01V1/00;G08B13/08;G08B13/16;H01H35/00 |
主分类号 |
G01S7/527 |
| 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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