基于单片机的数显电容测试仪的设计  

Design of Capacitance Meter Based on SCM

作　　者：赵巧妮[1] 

机构地区：[1]湖南铁道职业技术学院,湖南株洲412001

出　　处：《电子质量》2016年第5期71-74,共4页Electronics Quality

摘　　要：基于AT89S51单片机和555定时器芯片设计的数显式电容测量仪,由555芯片和电容电阻组成振荡电路来输出矩形波,通过单片机定时器T0测量其脉冲宽度,从而达到测量其周期的目的,再通过单片机软件编程,对数据进行进一步的计算从而得出被测电容的值,并通过液晶LCD1602显示出其测量的电容值。经过试验验证,该设计的硬件设计和软件设计都相对简单,成本较低。The digital capacitance meter is designed by AT89S51 microcontroller and 555 chip.A rectangular wave is generated in the oscillation circuit with 555 chip、capacitors and resistors.The pulse wave is put into timer T0 of SCM to measure the period.The period data is calculated through the SCM software programming to achieve the value of the measured capacitance and the value of capacitance is displayed on LCD1602 LCD.The hardware and software of the design is simple and low cost by test.

关 键 词：AT89S51 电容测量仪 555 简单 

分 类 号：TM934.2[电气工程—电力电子与电力传动]