| 摘要 |
PURPOSE:To obtain a practical device of simple constitution by measuring the azimuth of a detection body from phase data of a reflected wave and measuring the distance to the detection body from the time up to when the reflected wave is reflected. CONSTITUTION:Ultrasonic wave pulses transmitted into water by a transmitter 5 are reflected by the detection body and received by ultrasonic wave receivers 1 and 2. A phase difference meter 8 measures the phase difference between both received signals, a signal detector 25 detects the transmitter receiver 1 or 2 receiving the reflected wave from the detection body, and a distance counter 12 counts the pulse train of a clock pulse source 13. Then, respective data on the phase difference, distance, and analog level outputted by latch circuits 9-11 are inputted to a processor 5 through an input/output circuit 23 every time a detection output is sent out of the detector 25 and then the processor 15 writes respective data in a storage circuit 16 and writes the data readout of the circuit 16 on indicated storage addresses of a storage circuit 16. Then, display data read out of the memory 17 is displayed 18 through a D/A converting circuit 24.
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