Design And Implementation Of ADCP System Signal Processing Platform

There are abundant resources in the sea,but human exploration of the ocean is still at a primary stage.With the over-development of land resources,the earth's ecology has been severely damaged,and human beings have become more aware of the importance of marine resources.In order to exploit and utilize marine resources effectively,it is necessary to have a correct measurement of the parameters of the oceans.Among them,ocean currents,as one of the main oceanographic parameters,are of great significance for studying the laws of natural variation,diluting and purifying marine pollutants,analyzing the causes of global climate change and the storm surge and the development of marine fleets.Current measurement has always been one of the hot research topics of researchers both at home and abroad.Among all kinds of flow measurement technologies,ADCP flow measurement technology has become one of the most excellent current measurement technologies for its advantages of high efficiency,large range and good flexibility.It has attracted much attention in the field of flow measurement at home and abroad.This paper has designed and realized a signal processing platform of ADCP system.The platform uses the architecture of DSP + FPGA + MSP430.The signal processing platform is a versatile design for Acoustic Doppler Current Profilers(ADCP)covering 300 kHz,600kHz,1.2MHz and 1.5MHz bands with low power consumption and good real-time performance.This article mainly introduces the hardware resource requirements of the ADCP signal processing platform,and makes a complete and detailed analysis and demonstration for the requirements.On this basis,the hardware design of each function module is completed,and the key signals are simulated by Allegro PCB SI.The main function modules of the signal processing platform are as follows: high-speed ADC module,DSP and peripheral circuit module,FPGA and peripheral circuit module,MSP430 and peripheral circuit module.In order to verify the correctness of the hardware design of the signal processing platform,this paper simulates the signal integrity of the key signals and makes software design and performance testing of each functional module,including OMAP-L138 loading design,DDR2 memory debugging,FPGA Design and Performance Testing of High Speed ADCs,FIR filter design,high-speed parallel interface uPP design,SD card software design and debugging,MSP430 online programming design and RTC real-time clock design and so on.Signal processing platform meet the design requirements,with a launch signal generation,receive signal acquisition,algorithm processing,data storage,external communications,power control and other functions.At the end,this paper summarize the design of the entire signal processing platform,Describes the research results in this article and the design of the deficiencies and made plans for the next...