基于STM8S的室内甲醛检测系统设计  

The Design of Indoor Formaldehyde Detection Based on STM8S

作　　者：宋胜博[1] 罗云林[1] 

机构地区：[1]中国民航大学航空自动化学院,天津300300

出　　处：《电子器件》2015年第1期198-202,共5页Chinese Journal of Electron Devices

摘　　要：针对目前越来越严重的室内甲醛污染问题,设计了以STM8S为控制核心的便携式室内甲醛检测系统。该系统创造性地设计了一种基于减法器的硬件抗干扰电路,克服了以往甲醛电化学传感器检测设计电路中,采用温、湿敏电阻对传感器温、湿度系数进行补偿所造成的测量精度不足问题,并结合采样滤波算法和拉格朗日插值算法对采集的数据进行软优化。系统具有甲醛浓度阈值设定与超限报警功能,温度、湿度、万年历显示等辅助功能,真正实现了便携式与智能化的结合。实验结果证明,该系统在实际应用中具有较高的灵敏度、准确度、操作简单、性价比高等特色,还可推广应用于其他需要对甲醛浓度进行检测的场合。According to the increasing levels of indoor formaldehyde pollution problems,a kind of portable indoor formaldehyde detecting system in put forward based on STM8 S. The design creatively set on an anti-jamming circuit based on subtract hardware technology,that overcome the conventional circuit＇s problem of inadequate in the measure accuracy which just use the temperature and humidity compensation coefficient. It combined with sampling filtering algorithm and Lagrange interpolation algorithm to reasonably optimize acquired data. It also has a threshold setting,limit alarm,temperature,humidity,calendar display and other auxiliary functions,which truly realized portable and intelligent combination. Experimental results show that the system has a higher sensitivity,higher accuracy,simple operation and cost-effective characteristics in practical application. It also can be extended to the other needs of the formaldehyde concentration detected occasions.

关 键 词：电化学传感器 温湿度系数补偿 滤波算法 拉格朗日插值算法 STM8S 

分 类 号：TP212.6[自动化与计算机技术—检测技术与自动化装置]