UNDERWATER DETECTING DEVICE

摘要

PURPOSE:To detect underwater in a wide range direction for a short time with a comparatively simple configuration by writing time series signals of each reflected wave in storing addresses specified by a coordinate converter. CONSTITUTION:Respective receiving signals outputted from five vibrators 3 in an ultrasonic wave transmitter/receiver 3 are sent to a time series circuit 4 and outputted as time series signals. A direction counter 5 specifies the azimuth of a received beam and a distance counter 7 specifies the distance up to a reflecting source. The counted values of both the counters are supplied to a coordinate converter 8 and converted into a position on an XY orthogonal coordinates. A detector 9 detects the azimuth angle of the transmitter/receiver 3 against a reference azimuth and supplies the detected value to the converter 8. The converter 8 sends the position obtained after coordinate convertion to a storing circuit 12 through an address switching unit 11. The contents of the circuit 12 are read out by the specification from an X/Y axis counter 16/17 and the data of the A/D converter are written in the read-out position by a specification from the converter 8. Consequently detecting signals between bearings A and B can be displayed on CRT21.