The Research Of Reverberation Data Acquisition System And Data Processing

Reverberation especially short range reverberation which occurs after emission signal, is primary interference for the active sonar, consumedly limits the operation distance and parameter estimate of the active sonar, but sometimes the short range reverberation is difficult to collect. So it is necessary to design the Reverberation Data Acquisition System to collect the reverberation signal.The thesis mainly researches the design and debugging of the system's hardware and software. In hardware, the system is composed of power board, analog receiver boards and control board, it can realize the funcition of signal receiving, filtering, data acquisition and so on. In software, it can realize the data communications between the PCI interface and the fiber interface, remote control of the system's working state and working parameters. It also can display and store the collected data in real-time.In view of the reverberation signal's characteristics, the system uses a unique anti-saturation control circuit, which is effective to solve the problem of circuit obstruction. It can be used as reverberation data acquisition and general data acquisition. The equipment can be battery-powered or 220 volt power supplied, it adopt low-power, low-noise, wide band and wide dynamic range designs. What's more, the system can change work parameters through down-transfers command .the data transmit with multimode fiber. Digital Signal Processor (DSP) and Field Program Gate Array (FPGA) is the core of the control part, which made the hardware stabilization, decreased the power consumption and enhanced the system reliability. All of these make it possible of the function expand in future.