12届分类号:TP213单位代码:10452临沂大学理学院毕业论文（设计）电阻电容电感测试仪的设计姓名王金全学号200807840119年级2008专业电子信息科学与技术系（院）理学院指导教师刘怀强2012年03月11日临沂大学理学院2012届本科毕业论文（设计）摘要本设计是一种基于单片机(89C51)的高精度电阻电感电容测量仪器的设计.本设计采用MAX038单片压控函数发生器产生高精度的正弦波信号流经待测的电容或者电感和标准电阻的串连电路,利用电压比例计算的方法推算出电容值或者电感值,利用51单片机控制测量和计算结果,采用1602液晶模块实时显示数值,可以手动调节量程,正弦信号发生器可以实现幅值和频率的调整,为了提高精度,我们把被测的交流电压先通过ICL7650来消除因为AD637输入电阻较低产生的误差.实验测试结果表明,本设计性能稳定,测量精度高.关键词：电压比例法89C51AD6371602液晶I临沂大学理学院2012届本科毕业论文（设计）ABSTRACTThedesignisthedesignofahigh-precisioninstrumentforRLCmeasurementbasedonmicrocontroller(89C51).ThisdesignadoptedMAX038monolithicvoltage-controlledfunctiongeneratortoproducehighaccuracysinewavesignal,whichpassedthroughtheseriescircuitofthecapacityorinductanceandstandardresistance,andthenmeasuredtherespectivevoltageofthecapacityortheinductanceandthestandardresistance.Usingthevoltageproportionmethodcalculatedthecapacitancevaluesorinductancevalues.Thedesignused51microcontrollertocontrolthemeasurementandcalculationresults,used1602LCDtoshowtheresult.Therangecanbeadjustedmanually,sinesignalgeneratorcanadjustamplitudeandfrequencytoimproveaccuracy,wemeasuredtheACvoltagethroughtheICL7650toeliminatetheerrorcausedbythelowerinputresistanceofAD637.Experimentalresultsshowthattheperformanceofthisdesignisstableandofhighmeasurementaccuracy.Keywords:Voltageproportionmethod;89C51;AD637;1602LCD;II临沂大学理学院2012届本科毕业论文（设计）目录1引言....................................................................12电压比例法测量原理......................................................13系统方案................................................................23.1系统总体方案设计与结构框图...........................................23.2方案设计与论证.......................................................34硬件电路................................................................54.1稳压电源模块.........................................................54.2正弦信号发生器.......................................................54.3采样电路.............................................................64.3液晶显示模块.........................................................75系统软件设计............................................................85.1控制测量程序模块.....................................................85.2按键处理程序模块....................................................95.3电阻电感电容计算程序.................................................95.4液晶显示程序模块....................................................106系统测试与结果分析.....................................................106.1对正弦信号源的测试..................................................106.2对电阻电容电感的测量................................................116.3误差分析............................................................127总结...................................................................13参考文献..............................................................14致谢...................................................................15III临沂大学理学院2012届本...
