Parametric-array remote fish finding system

Abstract

A parametric-array remote fish finding system comprises a parametric acoustic array subsystem, a receiver transducer, a control / display module and a power supply. High-point low-frequency acoustic beams are generated by the aid of the parametric acoustic array subsystem, reflection echoes are received, the positions, distribution forms and scales and fish species of fish school are judged according to features of the reflection echoes and acoustic waves sent out by the fish school, and fish school signals are dynamically displayed in an image and character mode. The parametric-array remote fish finding system has the advantages that the shortcoming that the detection range of a traditional ultrasonic detection system is close is overcome, problems that a low-frequency acoustic fish finding system is easily influenced by reverberation and poor in shallow-water detection effect is solved, the fish finding system is distant in the detection range, high in detection precision and good in judgment capability of the positions, the distribution shapes and scales and the species of the fish school.

Description

technical field [0001] The invention relates to a fish detection system, in particular to a remote fish detection system based on a parameter array. Background technique [0002] After the rapid development period since the reform and opening up and the adjustment and rectification in recent years, China's fishery has entered a continuous, stable and healthy state. In recent years, with the reduction of coastal fishery resources, the cost of going out to sea for fishing has risen sharply, and high-tech equipment is urgently needed to improve the success rate of fishing. [0003] The sonic fish finder is an instrument that detects fish schools through the principle of acoustic echo, which is of great significance for improving the success rate of fishing at sea. Its signal source can emit sound waves and produce echoes in the water when it is hindered by fish schools, etc. According to the time interval between the transmitted pulse and the received echo pulse, the depth of ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a remote fish detection system based on the principle of acoustic parametric array, which realizes long-distance fish detection through the low-frequency directional sound beam generated by the parametric array, so as to solve the problem of the short detection distance of the ultrasonic fish detection system and the low-frequency sound wave fish detection system. Susceptibility to reverberation problems

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