下载后可任意编辑关键词：数字温度传感器；单总线；通信协议；DS18B20；AT89C2051；LED 显示器；报警信号。Abstract Temperature detection and control of industrial production process, one of the more typical applications, with sensors in production and life is more widely used, using a new single-bus digital temperature sensor to achieve the test and control the temperature more rapidly development, this paper is designed based on AT89C51 temperature detection and alarm systems. The system will be more than a single-bus temperature sensor DS18B20 and connected to a port on the controller, the temperature sensors on each loop collection, the temperature will be collected to compare with the set value, when the temperature exceeds the upper limit set , through the ISD1420 voice circuit gives voice prompts and alarm signal. In this paper, a single data lines extend multiple temperature sensor design methods and gives the system implementation of hardware and software flow diagram. The experimental tests show that this high accuracy, strong anti-interference ability, alarm timely and accurate, with a certain reference value. The system design and layout simple and compact structure, small size, light weight, anti-jamming capability, cost-effective to expand convenience, in large warehouses, factories, construction and other areas of intelligent multi-point temperature measurement in a wide range of applications prospects. Key words: digital temperature sensor; single bus; communication protocols; DS18B20; AT89C2051; LED display; alarm signal. 下载后可任意编辑目录摘 要............................................................................................................................IABSTRACT........................................................................
