The Method Research Of Multi-channel Echo Synchronous High-speed Processing In Underwater Acoustic Detection

Multi-channel underwater acoustic detection technique has important military and civilian value, is always the hotspot of the underwater acoustic detection, to solve the problem of synchronous on multi-channel Synchronous High-speed in Underwater Acoustic Detection becomes a key element. The present methods use multi-channel underwater acoustic signal, multiplex amplification, multiple high-speed AD, multiple DSP, the hardware with high complexity. The article from the point of view on raise work efficiency and reliability of the system hardware, first proposed the hardware architecture by mixed with the mixing, filtering and signal, use analog circuit put the multi-channel echo mixed into single-channel analog signal, to achieve through single high-speed AD, single PC to complete the multi-channel echo synchronous high-speed in underwater acoustic detection. The information extraction of multi-channel echo signal is the important goal of multi-channel underwater acoustic detection. The article on the basis of the acquisition of multi-channel echo signal, select the appropriate algorithm for information extraction, to determine the distance of target, line to a set of technology on object recognition technology adapted to the multi-channel underwater acoustic detection, and prepare for the key technologies of applied to shallow sea active ultrasonic detecting system and realization of underwater target recognition as weH classification.The article based on the application background of underwater garbage detection and classification. The underwater active acoustic detection system transmit a certain frequency and width of the ultrasonic to the target direction. The ultrasonic line into the echo signal through reflection of target, through Process the echo signal, extract the information of target.In this paper, based on the previous work, carry out in-depth study on the processing technology of multi-channel echo signal high-speed. On the basis of given the design thought, design the program of the system on multi-channel echo synchronous high-speed, to achieve the acquisition and processing of multi-channel signal, great reduce the hardware complexity; on the basis of design the system, made circuit board and conduct system assembly. Finally, in the existing laboratory environment, through tank experiments, test the high-speed processing system of multi-channel echo synchronous, based on test each index of the prototype, verify the feasibility of the system.