Research on LCR Impedance Measurement Based on SOPC
In this paper,LCR impedence measurement based on SOPC is introduced in detail. The measurement circuit is functionally divided into following three sections: The signal source section generates the test signal based on NCO in SOPC of Alteras FPGA-Cyclone-II EP2C8.The frequency of the test signal is variable from 30 Hz to 1 MHz; The vector ratio detector section measures two vector voltages across the DUT (Edut) and range resistor Rr (Err) series circuit. Each vector voltage is separated into 0° and 90° parts using phase detector and measured using an A to D converter by multi-integration.The software is developed under the Alteras development environmen qartusII 7.0 and NIOS II in FPGA. In this paper, A series adusting measures is adopted. All these measures make the entire instrument measurement accuracy 0.25％.
LCR impedence measurement based on SOPC NIOS II CPU signal source based on NCO Vector ratio detector five-terminal measurement
Li Nianqiang Wang Yutai Zhang Lu
School of Information science and Engineering Jinan University Jinan 250022 china
国际会议
西安
英文
2007-08-16（万方平台首次上网日期，不代表论文的发表时间）