发明名称 |
A SONAR DISTANCE SENSING APPARATUS |
摘要 |
A distance sensing apparatus is provided in the form of a case housing electronic equipment including a piezoelectric transducer for radiating pulsed sonic or ultrasonic signals along a measurement path through a sound horn (3) which creates a narrow beam. Reflected signals received back through the horn are received by the transducer and converted into electric measurement signals. A time measurement device is provided for determining the time lapse between radiation of a pulse and receipt of a reflected signal so as to provide a distance signal which will be representative of the path distance between the apparatus and the surface which will trigger a display (7) to give a distance reading. An important feature of the apparatus is that the electronic circuitry will include an amplifier which will increase the amplification of the electrical signals carried by a reflected pulse as a function of time lapsed from the radiation of a measurement signal pulse so as to compensate for the attenuation of the received signal. |
申请公布号 |
WO8102472(A1) |
申请公布日期 |
1981.09.03 |
申请号 |
WO1981GB00025 |
申请日期 |
1981.02.23 |
申请人 |
SONIC TAPE LTD;CZAJKOWSKI S |
发明人 |
CZAJKOWSKI S |
分类号 |
G01S7/52;G01S7/529;G01S15/10;G01S15/14 |
主分类号 |
G01S7/52 |
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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