The Design And Implementation Of A Multifunction Self-contained Acoustic Acquisition System

In many fields of modern ocean research and utilization,there is an increasing demand for real-time and fixed-point observation of some sea area.Marine Information acquisition play an important role in exploring the interaction between atmosphere and ocean,global climate change,marine disaster prediction,marine ecological environment detection and satellite remote sensing data verification.The self-contained acoustic acquisition system is a device can work long time to get and stores marine acoustic information.With the application has a flexible and efficient feature to meet a variety of needs.Now it has become an important tool in the research field of marine environmental noise research,marine biology research,ground acoustic parameter inversion,underwater acoustic channel characterization and marine equipment performance testing.The multifunctional self-contained acoustic acquisition system designed and implemented in this paper is a complete set of low-power marine acoustic information acquisition system.Its multifunctional feature is reflected in its modular design,which can be used in many different types of ocean observation platforms.The system can be quickly configured in the field and is suitable for a wide range of operating conditions.The main work done in the dissertation is as follows: Firstly,the design requirements are analyzed,and the system design is completed.System design using modular design can be selectively configured according to demand.The central control unit uses a low-power MSP432 platform and transplant ?C/OS-III real-time operating system on this platform to enhance the system's multi-tasking capability.A piece of CPLD for assistance achieves frequency function,and other function expansion.Analog signal conditioning unit with optional automatic gain control and programmable variable bandwidth filter unit.There are two ways to start collecting: timing and depth.In order to meet the deepwater conditions,select the clock chip with temperature compensation function,can achieve more accurate punctuality function.Reserved data transmission interface,enabling real-time data processing.After the completion of the system design,carried out the design of the entire system.The selection of components,circuit design and debugging are completed.Finally,the functions and indexes of this system are tested and verified.