Multi-azimuth scanning net-sounder

Abstract

The invention provides a multi-azimuth scanning net-sounder. The net-sounder comprises a water-borne display control branch unit, an underwater branch unit, an energy converter array group, and a cable which connects the water-borne display control branch unit and the underwater branch unit. The water-borne display control branch unit comprises a control computer, a display, and a power supply. The underwater branch unit comprises a power switching system, a multi-channel signal generation system, a multi-channel transmission system, a multi-channel signal conditioning system, a signal collection and processing control system, and a receiving and transmitting change-over switch. The energy converter array group comprises an upward detection energy converter, a downward detection energy converter, a forward detection energy converter array, and a peripheral detection transmitting and receiving array. The net-sounder employs a combination of energy converter arrays which can scan different azimuths, employs a supersonic wave as a detection carrier, and can accurately measure various types of information about fish schools, fishing nets and underwater topography through combination with the advanced technology of signal processing. The net-sounder can be widely used for many application occasions, such as pelagic fishery production, marine fishery resources research, and lake and river fishing.

Description

technical field [0001] The invention relates to a net position meter for obtaining various information such as underwater fish schools, fishing nets and underwater topography. Background technique [0002] In modern fishery fishing, only relying on long-term accumulated fishing experience has seriously restricted fishing efficiency. More and more fishery production boats are equipped with modern fishing aid equipment, and the net position indicator is one of the most important equipment. The net position meter can simultaneously obtain various information such as underwater fish schools, fishing nets and underwater topography, thus providing an important reference for safe and accurate fishing. [0003] The early foreign net position meter was dragged behind the fishing boat, and the underwater transducers were used to detect the distance from the fishing net to the water surface and the bottom, and the detection results were printed on the recording paper through the probe ...

AI Technical Summary

Problems solved by technology

The structure of this device is complex, and due to the harsh operating environment of the fishing boat, this mechanical recording device is easily damaged, and it cannot record the status of the fishing net and the information of the fish in and around the fishing net in real time, so it is still blind to use it to guide fishing. sex

[0004] With the proposal of our country's marine strategy, fishery production has developed rapidly, but our fishermen are seriously lacking in modern fishing aids, and largely rely on experience to fish, so our fishing boats often follow foreign advanced fishing boats The status of the work

Although there are a small number of fishing boats equipped with some fishing aid equipment in our country, most of them are obsolete foreign products with backward performance. Both have been monopolized by developed countries for fishery production for a long time, which is not conducive to the long-term development of my country's own marine industry

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