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Abstract
The measuring temperature basical theory of one kind of digital temperature sensor DS18B20 and the design process of the system of the measurement of multi-point temperature which is based on DS18B20 have been introduced in this paper.The process of this design includes two parts,the design of the software and the design of the hardware.In the part of the software,the design of the programming thinking and the flow chart have been shown,and in the part of the hardware,the design of the single chip microcomputer,the circuit of measuring temperature, the circuit of alarm,the circuit of displaying and the circuit of the keyboard interface have been shown.The single chip microcomputer is AT89C52,and the temperature sensor is DS18B20 digital temperature sensor which is the most advanced made by the American DALLAS company lately. LED display is adopted in the displaying module.
The system of multi-point measuring temperature based on DS18B20 is widely used in reality.This system has the advantages of simple system,easy connecting,using less lines,quick velocity of transition,which brings infinite convenience for the design of the hardware circuit and cut the exploitation period.
Key words DS18B20 the measurement of multi-point temperature Single chip microcomputer