| 摘要 |
PURPOSE:To display two kinds of underwater detection information on the same CRT, by storing detection signals of a scanning sonar and of a vertical fish-finder and by reading the latest stored information through an adding circuit with respect to fish detection. CONSTITUTION:Ultrasonic detection information using a scanning sonar and a vertical fish-finder are stored in matrixlike storage circuits 10 and 18 through write address circuits 9 and 17, respectively. Contents of the circuit 10 are read out through a read address circuit 22 which is counted up by an oscillator 19 controlling a raster scanning circuit 20 of a CRT21 and are displayed on the CRT21. When the number of line addresses from the circuit 22 becomes a prescribed value, read information from the circuit 18 is applied to the CRT21 through a counting circuit 23 by a switching circuit 24. This read is performed in accordance with line addresses of the circuit 17 which are applied to an adding circuit 25 which is reset when the addition value becomes a prescribed number, and the latest information of the circuit 18 is read out. Consequently, two kinds of detection information are displayed on the CRT21 simultaneously. |
