智能仪器仪表中数字温度实时时钟功能的设计  

Design of the Functions of Digital Temperature and Real-time Clock in Intelligent Instrument

作　　者：邹向阳[1] 李锋[1] 刘戎[1] 

机构地区：[1]桂林空军学院教研部,广西桂林541003

出　　处：《自动化仪表》2009年第2期60-62,共3页Process Automation Instrumentation

摘　　要：提出一种全部使用串行接口芯片实现的数字温度和实时时钟电路,采用单总线数字式温度传感器DS18B20进行温度测量,用串行实时时钟芯片DS1302获取实时时钟,温度和时间通过三线式串行接口液晶模块显示,微控制器采用STC12C2052单片机。电路具有接口简单、体积小、精度高和价格低等特点,可广泛用于智能仪器仪表中。The implementation of digital temperature and real-time clock circuits fully adopting serial interface chip is proposed. The temperature measurement is realized by using 1-Wire digital temperature sensor DS18B20 ;and the real-time clock is obtained by serial real-time clock chip DS1302. The temperature and the real-time are displayed through 3-line serial interface LCD module, and the micro-controller is the single chip computer STC12C2052. The circuit features simple,compact,high accuracy and low cost,it can be widely used in intelligent instruments.

关 键 词：智能仪器仪表 数字温度 实时时钟 单片机 串行接口 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]