| The illegal opearation monitoring equipment is the buoy used to monitor in the sound source signial emitted by the airgun, electric spark and high-power device from the ocean survey ships and the ocean exploration vessels. The equipment has the function of remote detection and recognition of the pluse siginal, thus obtaining the real-time operation activity of the illegal ship, making the national maritime rights and law enforcement have the characteristics of better real-time and pertinence.In order to detect, track and indicate the direction of the illegal operation ships into the particular parts of the ocean for long time uninterrupted, the signal processing system of the illegal operation monitoring equipment obtains the illegal targets by using the embedded processor ZYNQ. The signal processing system uses the low bandwidth receiving hydrophone array, obtaining the synchronous acquisition and processing of the acoustic signal, completing the data storage and transmission.The signal processing system controls the gain and synchronous acquisition of 4 analog signal channels, and processes the collected data by the algorithms of MVDR estimation and vector estimation. As the same time, the signal processing system completes the data transmission and storage. On the one hand, the system makes the data stored in the SD card, on the other hand, it transmits the data to the underwater acoustic communication transducer in the form of the serial interface, and the underwater acoustic communication transducer transmits the monitoring results to the data center, thus recognising the real-time activities of the illegal ships.The experiment shows that the power consumption of the signal processing system of the illegal opearation monitoring equipment is less than 2.5W when the system is working, and the system has the effectiveness of the target recognition when the angular resolution is 1 degree,and the index meets the requirement of the design. |
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