《毕业设计－基于单片机(89C51)的高精度电阻电感电容测量仪器的设计》.doc

12届分类号:
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

姓名
学号
年级 2008
专业电子信息科学与技术
系(院) 理学院
指导教师

2012年03月06日
摘要
本文介绍了一种基于单片机(89C51),通过测量电容或者电感和标准电阻各自的电压,,,标准电阻和电感或电容串联分压电路,多路开关,电压跟随器,高精度交流有效值转换芯片,A/D转换芯片,单片机,显示模块,键盘模块等部分,具有手动调节量程,通过单片机自动检测分析识别原件性质并通过LCD形象地显示出来,正弦信号发生器可以实现幅值和频率的调整,,本设计性能稳定,测量精度高.
关键词:电压比例法 89C51 AD637 电阻电感电容测量 1602液晶模块
ABSTRACT
小三号、Times New Roman字体、加粗、居中
The paper introduced the design of a microcontroller (89C51)-based high-precision resistor inductance capacitance measuring instruments. This design uses MAX038 monolithic voltage-controlled function generator to produce high-precision sine wave signal through the test of the capacitance or inductance, and the standard resistance series circuit, figure out by measuring the capacitance or inductance, and the standard resistance of the respective voltage, using the method of calculation of the voltage ratio of the capacitance or inductance value. This design uses 51 microcontroller to control the measurement and calculation results, the 1602 LCD modules real-time display values ​​include sinusoidal signal generator, the standard resistance and inductance or capacitance in series voltage divider circuit, multi-channel switch, voltage follower, high-precision AC /Converts the value of the chip, the A / D conversion chip, microcontroller, display module, keyboard module, and other parts, with manual adjustment range by a single-chip automatic detection analysis to identify the original nature of the image through the LCD display, the sinusoidal signal generator can be achieved amplitude andfrequency adjustment, in order to improve the accuracy of the measured AC voltage through the ICL7650 and to eliminate the error caused by the AD637 input resistance lower. experimental test results show t