粮仓温度和湿度的监测

文档编号:ZD1267  文档字数:16180,页数:58  附原理图，外文翻译

摘要：本设计是为了解决粮仓温度和湿度的监测问题而设计的温、湿度监测系统。本设计采用单片机AT89S53为控制核心，挂接在单总线上的多个单线数字温度传感器DS1820和智能化湿度传感器SHT11为温度和湿度的检测元件，以打印机为记录设备，日期时钟芯片DS1302为系统提供日期和时间，配以2×8键盘和8位LED显示器，并且设置了RS232接口电路，使其更容易与PC或其他设备连接。本设计实现的功能是对温度进行巡回检测, 对湿度进行检测，一旦温度或者湿度超出预设范围，则自动进行报警并打印当前温度值和湿度值，本系统的各项参数可随时修改，如温度上限、温度下限等，另外，系统也可根据需要随时打印当前的温度值和湿度值。
关键词：温度检测；湿度检测；单总线结构；单线数字温度传感器DS1820；智能化湿度传感器SHT11；

Abstract: This design is Wen 's humidity observation system of the design for the monitoring problem  to solve granary temperature and humidity .
This design uses oneboard computer AT89S53 to serve as the control nucleus , and the temperature hung to meet on the unibus  many single line numerals sensor DS1820 and intelligentization humidity sensor SHT11 serve as the checkout component of temperature and humidity , and clock chip DS1302 provided date and time for the system on date to the equipment takes the printer as the record , joins in marriage with 8 keyboards 2 ×s and 8 LED's displays , and has set up RS232's interface circuit , his more easily and PC or other device attachment is made .
The merit that this design is realized can be carrying on data logging to the temperature , and testing to humidity , in a single day temperature or humidity transcend setting up the scope in advance , but present time temperature value and the humidity value is voluntarily reported to the police and prints , all parameters of this system can be revised at any time , if the temperature upper limit and temperature lowers bound etc , in addition the system also can be worth according to needing the temperature value and humidity printed at any time before one .
Keyword : The temperature checkout ；The humidity checkout ；The unibus structure ；Single line numeral temperature sensor DS1820, ；Intelligentization humidity sensor SHT11,

目录
绪 论 4
第一章 系统的总体设计 5
1.1系统的功能 5
1.2系统的总体设计 5
1.3各部分的功能 6
第二章 系统的硬件设计 7
2.1温度检测电路 7
2.2湿度检测电路 11
2.3 日期时钟电路 13
2.4单片机系统 16
2.5键盘及显示电路 21
2.6打印机 28
2.7 RS232串行接口电路 29
2.8报警电路 31
第三章 系统的软件设计 32
3.1 软件的总体设计 32
3.2软件的详细设计 33
第四章  抗干扰措施 54
4.1微机干扰源及对系统的影响 54
4.2对干扰源消除的措施 55
结  论 56
参考文献 57
致  谢 58

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