Software Design of Temperature and Humidity Measurement
System Based on MCU
ABSTRACT
As the continuous improvement of people's life and production levels, living environment
a n d p r o d u c t i o n e n v i r o n m e n t f o r t h e r e q u i r e m e n t s o f m o s t i m p o r t a n c e t o
temperature and humidity control is a typical example, the temperature and humidity detection
system came into being of modern production and life a smart, fast, convenient and reliable
detection systems, particularly in the industrial production will occur if the test was not precise
p r o d u c t i o n o f m a n y a c c i d e n t s . S u c h a s c h e m i c a l p r o d u c t i o n i n t h e d e t e c t i o n o f i m p r o p e r
t e m p e r a t u r e c a n c a u s e r e d u c e d p r o d u c t i v i t y a n d p r o d u c t q u a l i t y d e c l i n e . A n d n o w t h e
t e m p e r a t u r e a n d h u m i d i t y d e t e c t i o n s y s t e m u s e d i s u s u a l l y a n a c c u r a c y o f
0.1℃ or 1 ℃ mercury, kerosene or alcohol thermometer for temperature measurement and
t h e u s e o f t r a d i t i o n a l m e t h o d s o f p h y s i c a l a n a l o g h u m i d i t y t e s t i n g . T h e t o t a l s c a l e o f
t e m p e r a t u r e a n d h u m i d i t y t e s t i n g i s u s u a l l y v e r y c l o s e i n t e r v a l s , n o t e a s y t o a c c u r a t e l y
distinguish, reading difficulties, and their relatively large heat capacity, the time required to
r e a c h t h e r m a l e q u i l i b r i u m l o n g e r , m a k i n g i t d i f f i c u l t t o r e a d a c c u r a t e l y a n d u s e v e r y
inconvenient.
Work for modern, scientific research and to provide better and more convenient facilities
need to start from a single chip technology, all toward the digital control, intelligent control
di recti on. T he desi gn is b as ed on micr ocontro lle r (A T89C52) as th e cor e, wi th temperature
s e n s o r s a n d h u m i d i t y s e n s o r s , a n d r e l a t e d p e r i p h e r a l c i r c u i t s o f t h e d e t e c t i o n s y s t e m , c a n
receive the measured signal is temperature and humidity environment, testing officers to the
d a t a t h r o u g h t h e d i g i t a l d i s p l a y , r e a l - t i m e m o n i t o r i n g t h e e n v i r o n m e n t t e m p e r a t u r e a n d
hum idity cond itions. Al l of the m eas urement opera tion can be achieved by t he host cont rol
software, temperature and humidity sensors are measuring the signal, the circuit is converted to
e l e c t r i c a l s i g n a l s , t h e n a m p l i f i e d b y a c e r t a i n c h i p T L C 5 4 9 A / D c o n v e r t e r t o t h e
m i c r o c o n t r o l l e r f o r d a t a p r o c e s s i n g , t h e s o f t w a r e a n a l y s i s T r e a t m e n t e v a c u a t i o n d i s p l a y
device.
The system includes hardware a nd so ftwa re desig n, high reliabili ty, simple structure to
realize the automatic adjustment of temperature and humidity. Application RS232 system also
i s c o n n e c t e d w i t h t h e h o s t c o m p u t e r , y o u c a n s e t u p a u t o m a t i c r e c o r d i n g o f t e m p e r a t u r e ,
hu midit y rela t ed p ar amete rs c an also b e se t a ut om atic all y records t he t ime i nt ervals ca n be
used in terms of meteorological observation.
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2012-11-28
22:39:23
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