JPS63129863U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a block diagram of one embodiment of the present invention;
The figure is a schematic configuration diagram of a delay line used in a sonar according to an embodiment of the present invention, FIG. 3 is an example of a delay line circuit, FIG. 4 is an example of another delay line circuit, and FIG. 5 is a further example of a delay line circuit. Other circuit examples, Figure 6 is a circuit example of a variable delay line with variable delay time, Figure 7
The figure shows an example of the use of a CR delay line in combination with a normal delay line, Fig. 8 is a graph showing the frequency characteristics of the delay line, and Fig. 9 shows a conventional ladder-shaped L.
FIG. 3 is a configuration diagram of a C delay line. 1... Transmission pulse generator, 2 ₁ to 2N... Delay line, 4 ₁ to 4N... Vibrator element,
6...Delay line, 7...Addition circuit, 8...
Digital scan converter, 11...RC phase shift circuit, 12, 13, 16... Operational amplifier, 14
...Resistor, 15...Capacitor, 17,21...
1 unit delay line, 18...NPN transistor, 19...PNP transistor, 20...variable capacitor, 22...CR delay line, 23...LC delay line.

Claims (1)

[Claims for Utility Model Registration] (1) It has a plurality of transducer elements, and an ultrasonic beam is electronically controlled and irradiated into the medium, and the received signal from the reflected wave is sent to each transducer element by a delay line. In a phased array sonar that performs phasing and summation with a predetermined amount of delay each time, a plurality of resistors and capacitors are connected between a pair of output terminals of an active element with opposite phases and a signal extraction point to the next stage. A phased array sonar characterized in that the received signals of each transducer element are delayed and phased and summed using a unidirectional CR delay line consisting of a series circuit of unit delay lines. (2) A request for registration of a utility model characterized in that a delay line with a variable delay time in which one or both of the resistor and capacitor constituting the CR delay line is changed is used for dynamic focusing or wave source tracking. Phased array sonar according to item 1.