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本文针对传统的河流流量测量方法存在精度差、效率低的不足,提出了一种利用数字下变频方法进行数字信号处理的基本思想。设计了一种基于CPLD的ADCP流量测量系统,重点介绍了该流量测量系统的工作原理、硬件系统构成、软件控制流程及数据处理方法,并对系统的硬件结构和软件设计进行了详细说明。利用DSP技术实现对回波信号的处理和解调,提高了ADCP流量测量系统的性能。
In this paper, aiming at the poor accuracy and low efficiency of the traditional river flow measurement methods, a basic idea of using the digital down-conversion method for digital signal processing is proposed. An ADCP flow measurement system based on CPLD is designed. The working principle, hardware system structure, software control flow and data processing method of the flow measurement system are emphatically introduced. The hardware structure and software design of the system are described in detail. The use of DSP technology to echo signal processing and demodulation, improve the ADCP flow measurement system performance.