摘要
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,最后将甲醛含量显示在LCD上,并在甲醛含量超标时进行报警。本设计体积小,集成度高,操作简单,具有很高的实用价值。
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 system 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 operation and with very high practical value .
出处
《山西电子技术》
2014年第3期22-23,共2页
Shanxi Electronic Technology
关键词
甲醛
单片机
传感器
formaldehyde
singlechip
sensor
