Abstract: This dissertation main doption VHDL language plait distance design realization to the diagraph of the charged barbed wire net frequency, period, phase shift and the power factor, the whole software design downloads the one FPGA( the spot the programmable logic machine piece) chip, being the CPU of the system, among them, the outer circle electric circuit still includes to is measure the signal changes to send, strain wave , comparison, the light separate, the keyboard and figureses shows etc. the hardware part, measure the function and can pass the keyboard choice, take care of in the figures up the manifestation.The system simplifies very much, the vivid is higher, at not change the hardware electric circuit of the foundation rising class, need to re- weave the distance download only, and can carry out the same technique index sign.A function is strong, the development process investment is little, the period is short, can modify again and again, keeping secret the function good, develop the tool intelligence to turn;The hardware description language VHDL has the systematic hardware description ability strong, in general use and design of exchangeability, can support various design methods and design the technique, the structure resources can share to the design, experiment and design support of management etc. advantage.
Key words: Electricity Quantity ; Measure; FPGA; VHDL