摘要
本文提出了一种基于TMS320F28335的频率测量方法,用于监测电力系统的电能质量。该方法采用DSP的eCAP模块和通用定时器对输入信号的上升沿进行捕捉,通过记录两个上升沿的触发时间得到输入信号的频率。与软件测频方法相比,其硬件电路简单,可靠性高、实时性好。理论分析和实验测试表明,该方法测频精度高,很好的满足了电能质量监测装置的要求。
This paper presents a new method of frequency measurement based on the TMS320F28335（DSP） ,for monitoring power quality of power system. This method uses eCAP modules and general-purpose timers of DSP to capture the rising edge of the input signal, gets frequency of the input signal by recording two trigger times of rising edge. Compared with soft measurement method, measurement device based on this method is of high reliability and real-time and the hardware circuit is simple. Theoretical analysis and experimental tests show that frequency measurement based on this method is of high precision, and it meets the requirements of power quality monitoring devices.
出处
《国外电子测量技术》
2010年第10期66-68,共3页
Foreign Electronic Measurement Technology
