JPS62176775U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the detection and prediction device of the present invention. FIG. 2a is a sound ray diagram calculated by the sound ray processing section of the embodiment of the present invention shown in FIG. 1, and FIG. 2b is a sound ray diagram of the embodiment of the present invention shown in FIG. FIG. 3 is a sound ray diagram showing a pattern of correction performed by a sound ray correction section. FIG. 3 is a graph showing the detection and prediction distance obtained by the conventional detection and prediction device. 1... Input processing section, 2... Noise level processing section,
3... Propagation loss calculation section, 4... Signal level processing section, 5... Signal excess processing section, 6... Display processing section, 7... Sound ray correction section, 8... Sound ray processing section, 2
1... Noise level calculation section, 22... Reverberation level calculation section, 23... Masking level calculation section.

Claims (1)

[Scope of utility model registration request] An input processing unit that is a detection and prediction device used in a sonar mounted on a ship and outputs a data signal of water temperature with respect to water depth, and a signal of own ship speed and sea state;
A propagation loss calculation section that inputs this water temperature data signal for water depth and outputs propagation loss data corresponding to the target water depth and horizontal distance, and a signal level processing section that inputs this propagation loss data and outputs the target signal level S. , a reverberation level calculation unit that inputs the propagation loss data and outputs a reverberation level signal; a noise level calculation unit that inputs the own ship speed and sea state signals and outputs a noise level signal; and this noise level signal and the reverberation level. a masking level calculation unit that inputs the signals and outputs the sum signal N; a signal excess processing unit and display processing unit that inputs the sum signal N and the target signal level S and outputs predicted distance data; In addition to the circuit, a sound ray processing section inputs a data signal of the water temperature with respect to the water depth and outputs sound ray maximum distance data, and a circuit between the signal excess processing section and the display processing section that outputs the predicted distance data. A sound ray correction unit is provided which inputs the maximum sound ray distance data and outputs the maximum sound ray distance data when the maximum sound ray distance is smaller than the predicted distance and the predicted distance data in other cases. Features a detection and prediction device.