Wide-band test device and method for measuring impendence of grounding body
A technology of testing equipment and grounding body, which is applied in the direction of measuring equipment, measuring resistance/reactance/impedance, impedance measurement, etc., and can solve the problem of narrow frequency range of frequency conversion testing equipment
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[0032] see figure 1 Shown, the present invention is a kind of broadband testing device for measuring ground body impedance, comprises the excitation source based on analog PI regulation, controller (DSP broadband SPWM and signal processing system) based on DSP and human-computer interaction system based on ARM .
[0033] The excitation source based on analog PI adjustment includes AC / DC converter, DC / AC converter, PI regulator, SPWM and comparator; the input end of AC / DC converter is the input end of the excitation source based on analog PI adjustment; AC The output terminal of the / DC converter is connected to the input terminal of the DC / AC converter, and the output terminal of the DC / AC converter is used as the output terminal of the excitation source based on analog PI regulation; the output terminal of the DC / AC converter is connected to the first comparator An input terminal, the output terminal of the given circuit is connected to the second input terminal of the compa...
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