Tuna tracking float acoustic anti-theft device
An anti-theft device and tuna technology, applied in the field of marine fishery, can solve the problems of no anti-theft device, economic loss and loss of buoy equipment, and achieve the effects of high recognition rate, wide pickup range and timely alarm.
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[0026] Such as figure 1 The shown tuna tracking buoy acoustic anti-theft device, the tracking buoy is fixed with the driftwood used for tuna purse seine fishing, the tracking buoy is a satellite tracking drifting buoy, which can be used as a Lagrangian buoy for ocean surface dynamics, so The tracking buoy is composed of a satellite transceiver, GPS, an echo sounder for detecting fish schools, a temperature sensor, a magnetic switch, a solar panel and / or a battery and a solid casing, and the acoustic anti-theft device is placed in the In the tracking buoy, the acoustic anti-theft device has a hydrophone for monitoring underwater noise. The output of the hydrophone is sequentially connected to a signal amplifier, a bandpass filter, an A / D converter and a DSP microprocessor, and the DSP microprocessor is based on stored conventional marine engine underwater noise sound feature library and pattern recognition The library performs feature extraction and target recognition on under...
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