基于单片机的室内甲醛浓度检测系统
田秀荣
【期刊名称】
《山西电子技术》
【年
(
卷
),
期】
2014(000)003
【
摘
要
】
As
everyone
knows
,
the
harmful
gas
remained
by
house
decoration
and
inferior
furniture
is
mainly
formaldehyde
which
has
great harm to human body health , many diseases is relevant to it such
as asthma , leukemia and etc .A detection system is designed to detect
indoor
formaldehyde
content
in
this
article .The
system
can
show
the
formaldehyde
content and
then
make
an
alarm .The
sys-tem
design
is
based
on
STC
89
C52
RC
with
MQ138
type
formaldehyde
sensor .The
A/D converter circuit converts the standard current output of the sensor
module to the signal for the MCU .This signal is processed by MCU , the
formaldehyde content is displayed on the LCD and it will make an alarm
when the formaldehyde is exceed .The design has the features of small
size
,
high integration
,
simple op-eration
and
with
very
high
practical
value .%
众所周知，房屋装修、劣质家具等所留有害气体主要为甲醛，甲醛对
人体健康有较大的危害，许多疾病的诱发都与甲醛有关，如哮喘，白血病等。
针对此，设计了一种用于检测室内气体所含甲醛含量的检测系统。该检测系统
具有显示甲醛含量以及超标报警的功能。该系统设计方案是基于
STC89C52RC
单片机，选择
MQ138
型甲醛传感器。在系统中传感器模块输出的标准电流经
由
A
／
D
转换电路转换为单片机能识别的信号，单片机对此信号进行处理，最
)
)
