Underwater sounding device and fish trap detection system

Abstract

The invention discloses an underwater sounding device and a fish trap detection system. The underwater sounding device comprises a cylindrical sounding part which comprises a front vibration casing and a rear vibration casing, a groove-shaped vibrator which is arranged in a cavity structure and is connected with the front vibration casing, annular T iron which is connected with the side wall of the cavity structure, and an annular magnet which is fixed above the T iron. The front vibration casing and the rear vibration casing are arranged up and down and form the cavity structure together. A voice coil is connected with the bottom of the vibrator. The voice coil is connected with a cable. The voice coil partially penetrates into a hollow structure composed of the front end of the T iron, the magnet and the length part, which exceeds the magnet, of the washer. The fish trap detection system sends an acoustic signal to fish school through a sounding unit, detects the trap effect in real time, and at the same time can comprehensively judge and analyze the species, size, location and the like of the trap fish school.

Description

technical field [0001] The invention relates to the technical field of fish domestication, in particular to an underwater sounding device and a fish trapping and detecting system. Background technique [0002] The construction of marine ranching is one of the effective methods to restore and improve my country's coastal fishery resources. Its core technology is to use sound to control the behavior of multiplication and release fish, which is the so-called fish sound domestication technology. This technology mainly uses the underwater speaker system to play sound in the water. Based on the fish's sexual response to the sound stimulus, it cooperates with the attractant bait to establish conditioned reflex, so that the short-term memory of the fish can form a long-term memory, so as to realize the behavior of fish in marine pastures. control. Limited by the hearing range of fish, traditional piezoelectric ceramic or magnetic transducers cannot be used, and due to the large dif...

AI Technical Summary

Problems solved by technology

Limited by the hearing range of fish, traditional piezoelectric ceramic or magnetic transducers cannot be used, and due to the large difference in acoustic impedance between water and air, impedance matching is difficult and the sound conversion efficiency is too low. Generally, the maximum sound emission The power is below 170dB, which is far from the minimum power of 200dB of active sonar

At the same time, the traditional fish sound domestication device can only actively emit sound waves to induce, and cannot accurately attract or disperse fish, and the use effect is not good

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