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,
