基于单片机的仓库温度监测系统设计与制作.doc

大连海事大学 ┊┊┊┊┊┊┊装 ┊┊┊┊┊┊┊装┊┊┊┊┊┊┊订┊┊┊┊┊┊┊线┊┊┊┊┊┊┊ 　 　　 二○一四年六月 基于单片机的仓库温度监测 系统设计与制作 专业班级：电子信息科学与技术1班 姓 名： 王振华 指导教师： 金国华 信息科学技术学院 摘 要 本设计是基于AT89C51单片机的多路仓库温度监测系统的设计与制作。利用三个DS18B20分别采集三路温度，由LCD1602液晶显示屏实时显示路数和该路的温度，实现对仓库温度的实时监测。 本设计主要包括温度传感器DS18B20、单片机AT89C51和LCD1602等器件，硬件电路包括温度检测电路、温度控制电路和一些接口电路等辅助电路，软件设计主要包括液晶显示程序、温度检测程序、温度转换命令子程序、计算温度子程序和显示数据刷新子程序几个模块。设计电路工作原理为：首先，由三路DS18B20温度传感器芯片测量各路当前的温度，并将结果分别送入单片机。然后，通过AT89C51单片机芯片对送来的测量温度读数进行计算和转换，井将此结果分别送入液晶显示模块，如果测量温度超过预定值，单片机同时也会把信号传递给报警电路单元。最后，LCD1602芯片将送来的值依次循环显示于显示屏上。借助仿真工具Proteus和单片机编程软件Keil实现系统软、硬件的交互仿真，并进行了电路的焊接和调试，实现了课题设计目的。 ? 关键词：AT89C51单片机；温度传感器；DS18B20；LCD1602 ABSTRACT This design is based on AT89C51 multiplex warehouse temperature monitoring system design and production. Using three DS18B20 temperature senso collected three road, respectively by the LCD1602 LCD real-time display the imlet and the temperature of the chain, realize the real-time monitoring of temperature in the warehouse. The design?includes temperature sensor DS18B20,MCU T89C51A,LCD1602 and other devices.Hardware circuit includes the temperature sensing circuit,the temperature control circuit,a number of interface circuits and other auxiliary circuits, Software design mainly includes the LCD display program, temperature detection, temperature conversion command subroutine and display subroutine, calculation temperature data refresh subroutine modules.The circure design works as follows:By the four road chip DS18B20 temperature sensor measurement of various current temperature,and the result into this LCD module through the AT89C51,if the measured temperature exceeds a predetermined value,the microcontroller will also send signals to the alarm circuit module.LCD1602 sends the value of the chips which will be in turn shown on the screen.The system interaction simulation of hardware and software has been railized with simulation tools Proteus and SCM programming software Keil.The author performs the cirtcuit con