Display And Control Software Design For Active And Passive Acoustic Positioning System

The active and passive underwater acoustic positioning technique, the mainstream of which is the technique based on geometry principle, is representative application of sonar system. Under the background of Active and Passive Underwater Target Measure System (APUTM), the dissertation analyses the display and control software design, which contains software design idea, software architecture, key algorithm and engineering application.APUTM system is composed of buoy subsystems on sea surface and ship-borne system consisting of computer system and base station system. The computer system takes charge of monitoring the whole system, such as storing and loading of data, computing and displaying of target track, transmission of commands and parameters, and so on. The system, whose function is typical and framework stable, can be described as software architecture for the underwater acoustic domain, integrating data resource subdomain with analysis subdomain and expressing subdomain. Based on the software architecture, object-oriented methodology and unified modeling language (UML), it makes the realization of software more stable, extensible and reusable.Algorithm design is the core of software design. The dissertation analyses related theory about underwater acoustic positioning, and discusses the design of high precision positioning algorithm and the correction of sound velocity. The high precision positioning algorithm depending on Doppler compensation correlator can make use of hyperboloidal intersection positioning to locate the high-speed target. The correction of sound velocity has two methods, one is iteration method, and the other is look-up table method. The former is more precise and the latter is simpler and more efficient. Under the background of this system, the correction of target depth is realized by the look-up table method based on the Range-Depth-Time Delay Difference (R-Z-T) table.The display and control software fulfills the predefined requirements, and runs well with peripheral equipments in experiments. Experimental results show that the state is stable; the algorithm is prominent, which is referrible for the design and development of congeneric software.