基于RS-232的数字温度测量计的设计与实现  

Design and Implementation of a Digital Thermometer Based on RS-232

作　　者：吴江平[1] 

机构地区：[1]江西财经大学软件与通信工程学院,江西南昌330013

出　　处：《科技广场》2015年第10期45-47,共3页Science Mosaic

摘　　要：本文提出了一个基于RS-232的数字温度测量系统。该系统采用温度传感器DS18B20进行测温,采用LCD对所测温度数值进行显示,单片机与DS18B20相连,对传感器传来的两路温度信号进行采样,通过LCD1620液晶显示器显示温度。采集到的温度数据经过MAX232进行电平转换,而后由RS-232传送到接收端的单片机,接收数据之后在显示之前与发送端设置的温度上下限进行比较,超过范围时接收端由蜂鸣器和LED灯发出警报,实现对温度的实时监控。该系统设计简单,控制部分由软件编程实现,精度较高。This article presents a digital thermometer system based on the RS232.The system uses a temperature inductor DS18B20 to measure the temperature,with the LCD to display the value.With microcontroller connected with DS18B20,we can take samples of 2-channel temperature signal from transducer and display the temperature by LCD1620 LCD Monitor.The collected temperature is level translated through MAX232,and then is transmitted to the receiver microcontroller by the RS232.After receiving the data before display,the data is compared with the lower and higher limit of temperature set by the sender.Once the value is out of range,the buzzer and LED of receiving end lights take a warning,and thus,the system achieves a real-time monitoring of temperature.The system is simple in design and is of high accuracy as the controlling part is implemented by software programming.

关 键 词：RS-232 DS18B20 MAX232 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]