Electric Energy Metering Circuit Structure and Method for Realizing Measurement Accuracy Pre-calibration Function
A technology of electric energy measurement and circuit structure, which is applied in the direction of measuring electric variables, measuring devices, instruments, etc., can solve the problems of incompatibility with peripheral circuits and high cost, and achieve the effect of reducing the cost of meter calibration, improving measurement accuracy, and simple calibration structure
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[0040] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.
[0041] see Figure 2 to Figure 4 As shown, the electric energy metering circuit structure for realizing the measurement accuracy pre-calibration function is mainly characterized in that the circuit structure includes a reference module, a sampling module, an analog-to-digital conversion module, a clock and frequency conversion module, a digital signal processing module, a calibration Register and interface module, calibration module, wherein:
[0042] (1) The reference module is used to generate the required reference voltage signal for circuit operation, and provides the reference voltage for the sampling module and the analog-to-digital conversion module;
[0043] (2) The sampling module is used to sample current signals and line voltage signals, and send them to the analog-to-digital conversion module for processing;
[0044] (3) The ana...
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