基于LM3S615的数字式LCR测量仪  

Digital LCR Measuring Instrument Based on LM3S615

作　　者：李晨[1] 曾国强[1] 葛良全[1] 

机构地区：[1]成都理工大学核技术与自动化工程学院,四川成都610059

出　　处：《仪表技术与传感器》2013年第2期16-18,90,共4页Instrument Technique and Sensor

基　　金：国家自然科学青年基金项目(40904054)

摘　　要：该数字式LCR测量仪以CortexTM-M3内核的LM3S615控制器为核心,采用自由轴法测量原理,实现了对电阻、电容、电感、Q值和D值的宽范围测量。仪器的信号源与基准相位发生器使用同一频率产生,增加了信号的稳定性,提高了鉴相的精确度;采用双积分A/D转换器,加强了测量的准确性。仪器基本精度达到了0.5%,还具有量程自动转换、自校准、串联等效和并联等效模式等功能。The digital LCR measuring instrument used LM3S615 which based on the CortexTM -M3 kernel as the controller and the digital free axis method to realize the precise measurement of the Resistance, Capacitance, Inductance, Quality factor and Dissipation factor. The signal source and benchmarks phase generators used the same frequency increasing the stability of the sig- nals and improving the precision of the phase discrimination and the use of double integral A/D converter enhanced the accuracy of the measurement. The instrument＇s basic measurement precision reaches 0. 5 %, besides the apparatus also have the functions of automatic range switching, self-calibration, series and parallel equivalent model.

关 键 词：自由轴法 LM3S615 相敏检波 LCR 

分 类 号：TM932[电气工程—电力电子与电力传动]