Electronic rotary echo sounder |
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| 申请号 | JP12965978 | 申请日 | 1978-10-20 | 公开(公告)号 | JPS5557165A | 公开(公告)日 | 1980-04-26 |
| 申请人 | Hirotaka Murahashi; | 发明人 | MURAHASHI HIROTAKA; | ||||
| 摘要 | PURPOSE:To ensure the display for the water, wind and school of fish by combining the electronic circuit producing the time difference and plural units of simple light emitting devices, thus realizing a long life time of the device as well as increasing the luminance. CONSTITUTION:Pulse A generated from reference time generator 1 is supplied to time difference generator circuit 2. Circuit 2 has the output terminals of five circuits, and thus the output signals shift to C from B and then to D from C with supply of every unit of pulse A. After reaching final F, the output signal returns to B to repeat this action. The time from B to F can be varied easily by changing the cycle of generator 1. Then the waveform shaping is given to measuring ultrasonic wave G through amplifier 5 to obtain voltage H. This voltage H plus the output signals from C to F supplied from circuit 2 are made to pass AND circuit 3, and as a result the output of circuit 3 emerges only to the circuit of the period during which the ultrasonic wave exists. Thus the light emitting device 4 connected to circuit 3 is actuated. | ||||||
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| 说明书全文 | |||||||
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