Application Program Design Of Towed Horizontal Fishery Detector

The fishfinder can be divided into veritical fishery detector and horizontal fishery detector in directions. Despite our courtry use it extensively, veritical fishery detector do have limitations and blindness. Fish can only be detected by veritical fishery detector in veritical direction. The horizontal fishery detector can detect fish in kilometer around and have vast foreground on derelopment.Towed horizontal fishery detector in this paper can detect, identify and track the underwater targets. It uses 2-D pressure-difference vector sensor, which measures acoustic pressure and the three dimensional particle velocity vector. Use the pressure-velocity combined processing to realize direction estimation.Display console is very important in the whole system.The design quality of display software will directly affect the performance of system. The function of towed horizontal fishery detector display software designed in this thesis is to complete the front-end data acquisition with data acquisition card, and to accomplish real-time signal processing. It can convey the information about the observing field exactly to the user.First this paper researchs the working principle of fishfinder, composition and working processes. Then designed under mixed programming of VC++ with Matlab, the towed horizontal fishery detector display software has the better characters such as visualization, more expansibility, operation in easier and so on. The thesis illuminates the multi-document interface, multithreading technique, message loop overloaded technology in the display, using differential evolution algorithm to achieve azimuth calculation. Last experimental data and simulation verifies the availability and accuracy of the display software.