Universal voltage input power frequency signal frequency measurement system
A power frequency signal and frequency measurement technology, applied in the field of electrical systems, can solve the problems of long input signal delay, difficult to guarantee accuracy, and narrow application range, and achieve the effects of poor hardware versatility, increased reliability, and improved sensitivity.
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[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions and some principles of the examples of the present invention will be described below in conjunction with the accompanying drawings. The present invention designs a general voltage input power frequency signal frequency measurement system, such as figure 1 Shown is the circuit schematic diagram of the power frequency signal frequency measurement system with universal voltage input. The present invention converts the wide-range universal voltage input signal transmitted from the power secondary transformer into a fixed-frequency pulse signal through a voltage conversion circuit, a conversion voltage self-adjusting amplifying circuit, a band-pass filter circuit, and a comparator circuit, and sends it to a digital signal The processing circuit performs real-time calculation and acquisition.
[0027] figure 1 It is a schematic diagram of a power fre...
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