Deep water net cage fish school status remote real time monitoring instrument based on acoustic multi-beam

Abstract

The invention discloses an acoustic multi-beam-based remote real-time monitor of fish shoals in a deep water net cage, relating to a monitoring device. The invention provides the acoustic multi-beam-based remote real-time monitor of the fish shoals in the deep water net cage which has flexible marine operation, easy placement and strong anti-wave capability. The acoustic multi-beam-based remote real-time monitor is provided with a detection signal transmitting and echo collection device, a data analysis and image display device and a data wireless transmission device. The detection signal transmitting and echo collection device is provided with an annular transducer array and a control box, and the annular transducer array is provided with single beam transducer array elements; the control box is provided with a power supply, a controller, a detection signal generator, a power amplifier, a signal collection and preservation circuit and a signal pre-treatment circuit. The data analysis and image display device is used for realizing the remote detection and the control operations on a bank station, carrying out the analysis of the received monitoring data of the fish shoals in the net cage and carrying out the image display of the result. The data wireless transmission device is connected with the detection signal transmitting and echo collection device and the data analysis and image display device.

Description

technical field [0001] The invention relates to a monitoring device, in particular to a remote real-time monitor for the safety state of fish schools in deep water net cages based on underwater acoustic multi-beam technology. Background technique [0002] Usually, the existing fishing rafts cannot withstand the attack of typhoon and big waves, and there are many problems in the production of cage culture. For example, Typhoon Feiyan in 2001 disabled 210,000 seawater net cages in my country, causing a direct economic loss of 1.18 billion yuan. Deep-water cages have the characteristics of strong wind and wave resistance and high-yield and high-efficiency breeding. Currently, they are widely used in marine fish farming and have a good momentum of development. However, compared with traditional cage culture, deep-water cages are usually difficult to observe the net clothing and the activity state of fish in the cage due to the deep waters in which the cages are located and the ...

AI Technical Summary

Problems solved by technology

However, it is impossible to monitor the netting around the cage, and the echo signal of the fish school at the bottom of the cage is easily affected by the reverberation of the seabed

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