Parametric-array remote fish finding system

A parametric array and long-range technology, applied in the field of fish detection system, can solve the problems of reverberation interference of low-frequency sound wave fish detection system and short detection distance of ultrasonic fish detection system, so as to avoid being susceptible to reverberation interference and improve fish detection ability , The effect of high detection accuracy

Inactive Publication Date: 2015-07-29
SHENZHEN XINGYU REMOTE ORIENTATION OBSERVATION & CONTROL TECH CO LTD
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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 bea

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  • Parametric-array remote fish finding system

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Embodiment Construction

[0017] figure 1 The working principle of the parametric array remote fish detection system is shown. The parametric array remote fish detection system 1 is installed on the underwater turntable 2; the underwater turntable 2 is installed on the fixed pole 3; the fixed pole 3 is installed on the fishing boat 4. The parametric array remote fish detection system 1 first emits a high-frequency modulated sound beam into the water, and generates a low-frequency directional sound beam 5 through the nonlinear effect of the sound beam propagating in the water. The low-frequency directional sound beam 5 generates an echo 6 after encountering a school of fish or the seabed. The parametric array remote fish detection system 1 analyzes the echo 6, and distinguishes the fish school from the sea bed according to the different characteristics of the sea bed echo reflection and the fish school echo reflection. Since the angle of the low-frequency acoustic beam emitted by the parametric array ...

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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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Application Information

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IPC IPC(8): G01S15/96
CPCG01S15/96G01S7/52003
Inventor 陈敏黄彦鑫
Owner SHENZHEN XINGYU REMOTE ORIENTATION OBSERVATION & CONTROL TECH CO LTD
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