本系统以AT89S52为核心，选用符合测量温度范围要求的DS18B20单总线数字温度传感器，DS1302串行时钟芯片，RT1602液晶显示器实现液晶显示当前日期、时间、星期和温度。当测量温度超过设定的温度上下限时，启动蜂鸣器和指示灯报警。温度显示稳定，温度值小数部分保留两位有效数字。-AT89S52 in the system as the core, consistent with the measured temperature range chosen required DS18B20 single-bus digital temperature sensor, DS1302 serial clock chip, RT1602 LCD liquid crystal display to achieve the current date, time, week and temperature. When measuring the temperature exceeds a set upper and lower temperature limit to start alarm buzzer and indicator light. Show the stability of the temperature, the temperature values of two decimal digits in the part of the reservation.