电压相量测量仪设计

Design of the phase voltage measurement meter

介绍了基于MSP430F169的电压相量测量仪基本原理、电路设计和监控程序设计.信号处理电路对输入的被测电压进行量程调整、精密整流和相位鉴定,单片机通过片内A/D转换通道测量参考相量和被测相量有效值;通过片内定时器B通道测量交流信号频率和被测相量与参考相量之间的相位差.经原理样机验证,达到了设计目标.该测量仪电路简单、造价低廉,可作为电路理论教学中相量实验的专用仪器.

This paper introduces the basic principle,circuit design and monitor program of the phase voltage measurement meter based on MSP430f169.The input voltage signal is processed by the signal processing circuit with range adjustment,precision rectification and phase identification.The effective values of the reference phasor and measured phasor can be measured by A/D conversion of MSP430169;the frequency of AC signal and the phase difference between reference phasor and measured phasor can be measured by Timer B.The test of principle prototype proves that the measurement meter with simple circuit and low cost can be taken as the experimental instrument in circuitry theory teaching.