Underwater target identification method based on split beams
A split beam and recognition method technology, applied in the field of underwater target recognition, can solve problems such as inability to effectively monitor and evaluate, incapable of long-term, real-time fixed monitoring, poor timeliness of navigation survey data, etc., to improve target detection capabilities , signal estimation stability, and the effect of improving accuracy
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[0055] The present invention will be further described now in conjunction with accompanying drawing.
[0056] like figure 1 As shown, the present invention provides a method for identifying underwater targets based on split beams, using a broadband four-quadrant split beam transducer as a front-end information sensor; the method specifically includes:
[0057] The four-quadrant split beam transducer transmits acoustic signals of a specific frequency and bandwidth to a certain sea area in the form of "narrowband-broadband" beam alternating periods, and transmits the acoustic signal to the marine biological target to be measured in the sea area, and produces scattering Echo signals are sequentially reflected to the four channel receivers of the four-quadrant split beam transducer;
[0058] The receiver of each channel receives the echo signals reflected from the target to be measured in turn, and performs gain control amplification and AD analog-to-digital conversion on each ec...
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