Research Of ADCP Signal Processing Algorithm And Implementation Based On Parallel Computing Platform

According to the needs from the acoustic Doppler profiler(ADCP)of multi modes and multi application scenarios,this paper put forwards the concept of combined ADCP,designs and implements the signal processing system of the combined ADCP with high real-time and high scalability on the basis of TMS320C6678 multi-core parallel platform.Specific work is as follows:1.According to the basic principles of ADCP and the difficulties in the implementation process,the rules of ADCP signal and data processing are analyzed and summarized.There are two main points of generalization:the contradiction between the high real-time requirement and the instantaneous calculation,the complex control process and the variable calculation parameters.Therefore,the design requirement of ADCP signal processing system with concurrent and high instantaneous computing capability is urgent.2.Based on the research and synthesis of the commonness and characteristics of the traditional ADCP,a combined ADCP with wide range of scenes based on the various transmit signal combinations,the multiple flow measurement combinations,and a variety of processing algorithms is proposed.3.On the basis of decomposing and modularizing the echo processing flow,the echo processing flow based on the pipeline is designed,and the processing efficiency of echo processing flow is obviously improved.A parallel computation method of ADCP flow measuring algorithm,which is based on the piecewise parallel computation of single beam flow measurement and the splitting parallel computation of multi beam flow measurement is proposed.The efficiency of the echo signal processing algorithm increases exponentially4.A combined ADCP signal processing hardware system is designed and implemented based on TMS320C6678 multi-core processor.The modular multi thread software design method is used to realize multi-core parallel processing of ADCP with multi thread,and it has good scalability.After the completion of the system,the laboratory pool experiment was carried out to verify the feasibility of the system.