The Study Of Current Profiler Data-Processing System Based On Dual-Core Processor

Based on the theory of ultrasound contains the flow information of the current while transmitting in the flow of fluid, Acoustic Doppler Current Profilers (ADCP) can transform the velocity information into the flow information through the reliable signal processing methods. Compared with the previous conventional flow measurement systems, ADCP system is a kind of ideal energy-efficient flow measurement system, which can be installed conveniently and won't change the fluid flow stat, etc. Therefore ADCP system research will be a very meaningful research subject both to the improvement of automatic measurement technology or environmental protection. Primary researches of this dissertation are described as follows:Firstly, the dissertation describes the fundamental principles and.methods of the ADCP system basing on the reference and absorption of advanced ultrasonic technology at home and abroad and complete the designs of the hardware and part of the software processing system.Secondly, the hardware system designs OMAP-L138 (DSP+ARM) and Altera's EP3C16Q240 as the processing core, and the A/D data processing speed achieve high as 200KSPS. The system comprises of signal generation circuit, signal reception, power amplification and filtering circuit, data collection and storage, OMAP-L138 (DSP+ARM) processing module.Thirdly, the software system mainly introduce the implementation of data acquisition and signal processing on DSP in detail. Based on the characteristics of acoustic communication, the dissertation established a simulation model and simulated the performance of three main method.As the condition of testing, the accuracy of system specific indicators cannot be measured. Finally, the paper gives the system improvements.