›› 2013, Vol. 26 ›› Issue (12): 70-.

• 论文 • 上一篇    下一篇



  1. (国家新闻出版广电总局 无线局561台,江西 南昌 330026)
  • 出版日期:2013-12-15 发布日期:2014-01-10
  • 作者简介:孙亮(1982—),男,工程师。研究方向:电子通讯。E-mail:1102302877@qq.com

Temperature Detection and Protection Circuit Based on the AT89S52 Microcontroller

 SUN Liang   

  1. (Radio Station 561 Unit,State Administration of Radio Film and Television,Nanchang 330026,China)
  • Online:2013-12-15 Published:2014-01-10



关键词: 单片机, RS485协议, DS18B20数字传感器


This paper presents a real-time multi-point temperature detection circuit design with ATMEL AT89S52 MCU and DALLAS DS18B20 single-bus digital temperature sensor as the core.The detection units can functions independently with timing acquisition of temperature according to the next-bit machine instruction.The real-time temperature measurement results are displayed locally,and the relay is disconnected if the value goes beyond in the security limit.The collected data can be sent to the host computer when necessary via single-chip serial port using an RS-485 bus and communication protocols for archiving and disposal.

Key words: SCM;RS485 protocol;DS18B20 digital sensors


  • TP368