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01-Applied Mathematics & Information Sciences
An International Journal


Volumes > Volume 9 > No. 1L


A Simple Approach for Power Signal Frequency Determination on Virtual Instrument Platform

PP: 65-71
Yeong-Chin Chen, Tseng-Hsu Chien,
A simple approach to the zero crossing technique for the purpose of frequency determination of power signal is presented. The Fourier algorithm is used for digital filtering in order to extract the cosine and sine parts of the fundamental frequency component. Then, the zero crossing technique is applied to the cosine or sine components of the signal. The derived algorithm is developed in a PC-based signal analyzing platform for its implementation. The computer is equiped with the DAQ device and LabVIEW program. As the acquired signal was stored in the databank of the program, zero crossing algorithm is implemented to determine the frequency of the power signal. A burst sinusoidal signal with its high harmonic is stimulated by the signal generator to evaluate the accuracy for this developed system. This experiment can approve that the zero-crossing algorithm is an effective method for the frequency estimation.

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