摘要
介绍了系统信号调理电路和以DSP及模数转换器ADS7805为核心的信号采样电路,结合快速傅里叶变换介绍了系统参数测量的主程序及服务子程序,最后对系统应用中的测量精度进行了分析。实验表明该仪器测量电压精度达0.5级,频率分辨率达20Hz。
This paper introduces the measurement theory,hardware structure and software flowchart in this system.It describes signal acquisition circuits and signal sampling circuits based on DSP and ADS3820.Main program and various service subroutines about electric power parameter detection based on FFT is presented.Finally,measurement accuracy in application was anslyzed.Experiments showed that its voltage precision reachs 0.50,frequency resolution is above 20Hz.
出处
《工业控制计算机》
2010年第12期88-89,共2页
Industrial Control Computer
