室内空气质量检测系统软件设计与实现

北京理工大学珠海学院2020届本科生毕业设计Indoor airqualitydetectionsystem's software designandimplementationAbstractThe design is based on C52 SCM,using KEIL and Proteus to design an indoor airquality detection system.This system includes the following modules:detection module,display module,alarm module and GSM module.This system could be used for temperature,humidity,formaldehyde concentration and the concentration of PM2.5,the concentration ofmethane,carbon monoxide for testing as well as display them on the display screen in realtime.Each detection function can adjust its alarm value.When the readings are greater thanthe alarm value,system's alarm module works.Besides,the GSM module will sends alertmessages to the designated mobile users to achieve remote alarm.This paper presents a median filtering method based on vector norm,which using themethod of digital filtering algorithm of median filter to remove noise with the data of the ADconverter,overcome by an accidental factors on the acquisition data generated by theinterference.In addition,it also combined with the bubble algorithm to obtain the median ofthe sampled data more easily.At the same time,the vector norm is calculated for the samplingresults of two adjacent passes through the median filter,which significantly improves therobustness of the system.This design is also equipped with GSM module,using the moduleof the wireless communication network to achieve long-distance communication.Keywords:Median filtering;Bubble algorithm;Vector norm;Robustness