【摘要】 介绍了以 5 1系列单片机为核心的测试仪 ,可测量交直流电压、交直流电流、功率、失真度、频率等参数。在一个周期内多次采样 ,经过傅立叶变换FFT算法 ,获得电压、电流值 ,进而求得功率、失真度。提出了测量交流电频率和功率因素的新方法 :用T0门控计数方式 ,配合INT0中断 ,测量交流电的过零脉冲的周期 ,可测出频率 ;用同样方法 ,再加入INT1中断 ,测量交流电电压过零和电流过零的间隔时间即可测得功率因素。此测试仪测量方法新颖 ,测量精度较高。测试仪与PC机联机后 ,配上专用软件包可完成记忆示波器的一般功能更多还原

【Abstract】 The tester use 51 series single chip computer serv e as core,mensurability AC or DC voltage?AC or DC current?power?distortion?frequency.Time after time at one cycle by Fast Fourier Transform,gain voltage?current?and gain power?distortion.It bring forward new means for measure AC frequency and power complication:Using to gating take count of fashion,assort INT0 intermit measure AC across zero pulse cycle,approve measure frequency;also reenter INT1 i ntermit, measure time course of AC voltage across zero and current across zero n amely measure power complication.更多还原