求翻译：本文介绍了用PIC16C54实现的电力系统工频的测量原理，并由此构成的电力工频测量仪（即，电力周波表）。该装置对输入的交流电压信号的工频周期进行精确测量，通过测量工频频率的周期的办法获得工频频率，并由三位数码管显示出来，其测量范围为40.7Hz~60.0Hz，具有实时测量、显示和超限报警三大功能。该装置克服了运用倍频原理设计的电力工频测量仪不能长时间稳定工作的困难，具有稳定性好、精度高、抗振动等优点，特别适用于电力电网、自动化控制系统中对频率的测量与显示。是什么意思？

This article describes the work of power system frequency using pic16c54 measuring principle, and thus posed by electrical power frequency measuring instrument (ie, power cycle table). Accurate measurement of the device on the input AC voltage signal frequency cycle, by the way of measuring the powe

This article describes the PIC C 16 54 to the power system for the measurement, and how it works and thus constitute a working frequency of the electricity meter (i.e. , Power frequencies list). To enter the unit of the AC voltage of the signal in the frequency cycles through precise measurements,

This article introduced realizes the electrical power system power frequency survey principle with PIC16C54, from this and constitutes electric power power frequency measuring instrument (i.e., electric power frequency meter).This equipment carries on the precision measuring to the input alternating

Describes a PIC16C54 realization of principle of power system frequency measurement, and which constitute the instrument for measuring power frequency (that is, power cycle). AC voltage of the device to the input signal power frequency cycles of precision measurement, by measuring the frequency of c

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