| Now the society, the electrical energy has become the most important energy. Under market economy, the people must be high to the electrical energy measurement request accuracy, the service life requests long, but to the management request realization intellectualization, the automation which uses electricity. These all are the traditional induction-type electrical energy table helpless.This article designs the electrical energy table is based on the DSP single-phase electronic formula electrical energy table. In hardware circuit design, this article multianalysis DSP characteristic and merit, and has carried on the comparative analysis with the monolithic integrated circuit, has determined the fixed-point DSP plan. This article has designed the special power circuit, transforms through the A/D switch the city electricity into the digital quantity, by the sampling electric circuit to the user power line voltage and the electric current real-time sampling, uses the special-purpose electrical energy table integrated circuit, carries on processing using DSP after the sampling voltage and the electric current signal to transform the pulse signal output which is proportional with the electrical energy and to demonstrate. According to the need, may rest on the stipulation the communication protocol (RS-232), will store data uploading will give the position machine.This article has selected the modular programming method in the software design, in the paper to the master routine and the sampling procedure, the electrical energy computational procedure small steelyard procedure has carried on the elaboration. In the computational method, the article has analyzed the electrical energy measurement basic parameter, introduced some these parameter computational methods, and has conducted in the theory research to the overtone analysis.Finally, this article has also made the analysis to the system hardware and the software disturbance, proposes the corresponding antigambling measure.
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