摘要
本文提出了一种利用快速宫里叶变换(FPT)技术来测量非正弦周期电量有效值的方法,给出了实验数据。文中利用同步采样技术来消除FFT采样中的泄漏效应,比起通常采用的定时采样来,可使测试精度大为提高。事实上,这种技术适用于对任何周期量进行PFT处理。另外,它还别特适用于被测信号的频率随机漂移的实际工业测试场合。
In this paper, a new method for measuring RMS of nonsin-usoidal periodic electric signal is discussed. That is the method of FFT.The results of experiment are given. The leakage effect which is always exis-ting in FFT has been removed by means of the synchronous sampling techno-logy. Compared with the time interval sampling technology which is usedin conventional FFT it has more higher accuracy of measurement. In fact,this technique can be used for handling any periodical signal in FFT. Besides,it is especially suitable for measuring the signal of which the frequency isdeviated at random in industrial environment.
出处
《仪器仪表学报》
EI
CAS
1985年第3期308-313,共6页
Chinese Journal of Scientific Instrument
