基于交直流电识别与用电器分析的简易功率计OA

When overhauling circuits,in order to rapidly identify the type of faulty electrical appliances,determine the power consumption types of the affected circuit,and measure electrical parameters,a simple power meter was designed using the STC12 microcontroller.Through AC/DC voltage and current sampling circuits,programmable amplifiers,and signal conditioning circuits,it can automatically identify the circuit's power consumption type and impedance characteristics while measuring electrical parameters.By applying Fourier transform-based current frequency domain analysis,the amplitude and phase of each harmonic component in the electrical appliance's current are obtained.This enables identification of the appliance type and determination of whether a fault has occurred.It can record the electrical characteristic parameters of appliances to complete a learning function.Testing confirms this device delivers accurate measurements at low cost,with all performance metrics meeting design specifications.