软件测频方法及其在交流电参数采集中的应用

摘要

On the basis of discrete Fourier transform AC sampling algorithm, this paper proposed a method of software frequency measure-ment. This method not only retained the advantages of the ifltering ability of discrete Fourier transform algorithm, but also simpliifed the circuit of frequency measurement. This paper described the software frequency measurement principle, making a deduction for the formula of various AC parameters and giving an AC parameters acquisition implementation plan based on the STM32F103ZE processor and the AD7606 analog-to-digital conversion chip. The lfowchart of software design was discussed. The test veriifes the applicability of this implementation plan.%在傅里叶交流采样算法的基础上提出一种软件测频方法，该方法既保留了傅式算法滤波能力强的优点，又简化了系统的硬件测频电路。阐述了软件测频的原理，推导交流电各个参数的计算公式，并结合单片机技术给出了一种基于STM32F103ZE处理器和AD7606模数转换芯片的交流电参数采集实现方案，论述了软件设计的流程，通过测试验证了该方案的适用性。