設計實現了開路電壓和交流阻抗測量系統。利用數字合成方法產生測量交流阻抗的
1KHz 正弦激勵信號；調整正弦激勵信號產生的電流和開路電壓測量模塊輸入阻抗，以適應測量環境要求；利用ADC 獲得開路電壓和正弦激勵峰值電壓參數；用數字鑒相方法獲取正弦信號的相位差；應用PIC 單片機控制定時測量、參數換算、顯示輸出等。
關鍵字：單片機；電壓測量；阻抗測量；數字合成正弦波

Detecting System of Voltage and Reactance LI Ji-ming, ZHANG Yue (Graduate School of ShenZhen, Tsinghua University ShenZhen 518055) Abstract: The Detecting System of Voltage and Reactance of electrical gears is designed. The system generates 1KHz sine wave using DSS method; amplifies the peak voltage of the stimulating sine wave and enhances the input resistance of the open voltage detecting module for the special requirements in the concrete evaluation; retrieves the voltage values digitally using ADC; gets the phase difference parameter digitally; utilizes PIC microprocessor as the main controller to time the detections, do the mathematic operations and display the outputs.
Keywords: PIC Microprocessor; Voltage Detection; Reactance Detection; DSS