MEASURING INSTRUMENT FOR HUMIDITY BASEED
ON ADuC812 MICROCONTROLLER
ABSTRACT
The temperature and relative humidity of environmental condition are two
important physical parameters, in industry department as well as the laboratory
and so on the petrification, metallurgy, electric power, drugs manufacture,
cement requests the high situation to the temperature and relative humidity
survey, it appears very important to develop a reliable and practical instrument
that can examine the relative humidity of environment.
Based on the ADuC812 microcontroller humidity instrument be able to
accurate examine environment temperature and the relative humidity on
real-time, and user can set the humidity examinant’s range, so it will give a
when the real humidity beyond the limiting. It attaches the correspondence
connection may conveniently the realization and the computer real-time
communication.
In the whole design process, we have synthesized referred to the domestic
and foreign similar products design method, the union user's demand, as well as
high Xingjian compared to and so on target, after research, used take included
A/D the switch the ADuC812 microcontroller as the core control component,
take the high sensitivity warm sensor AD590 as the data gain part and take the
humidity sensor THS11 as the data gain part, and took the graphic display
device with LCD the hardware design proposal. In addition, has used the RS-232
serial data connection in the serial communication aspect. But software partial
uses modular the design method, causes various segments the function even
more to be clear about, the readability is stronger.
The temperature and humidity detector circuit design , to complete a captial
temperature and humidity testing , achieving basic functions of temperature and
