Research And Application On Smart Monitoring System Of Spatiotemporal Environment Parameters Through Following Person Move

It is vital to describe indoor environmental requirements,track self-adaptive behaviors,avoid health risks and guide healthy lifestyle for the collection methods of human environment experience.However,owing to the complicated influencing factors appearing in the human environmental exposure process and the multidisciplinary field.At present,there is still a lack of collection methods with the functions of multi-dimensional environmental exposure process monitoring and individual behavior path recording at the same time.This topic mainly aims at the defects and urgent problems of the data collection methods of human environmental exposure characteristics in the field survey,and adopts the methods of literature review,technical research and development,experimental research and so on.a smart monitoring system of spatiotemporal environment parameters through following person move has developed,and a case study of the system application has carried out to provide technical support for the real-time monitoring and evaluation of multi-dimensional human environmental exposure experience.The followings are the main research work in the thesis:（1）By using the method of literature review,this paper summarizes the research progress on the related research problems of environmental exposure experience and the monitoring methods of human environmental exposure experience.According to the data characteristics of environmental exposure experience,a scheme of synchronous data acquisition system for human activity trajectory and environmental exposure Internet of things is put forward from the point of view of the combination evaluation of individual behavior path and personnel environmental exposure characteristics.（2）A smart monitoring system of spatiotemporal environment parameters through following person move is constructed by combining the technical means such as Web of Things,wireless sensor network,visual monitoring and so on.In terms of system hardware,acquisition modules of light and thermal environment and IAQ-Motion trails are adapted in the collection form of tracking spatiotemporal environment parameter,which realizes the real-time recording and wireless data transmission of multi-dimensional human environmental exposure process.With the help of low power processor,the low power operation is achieved by setting MOS switch-off circuit and setting standby and wake-up time in RTC clock.The data collected by each sensor conform to the real situation after the error correction of the parameter sensor through the calibration experiment.What’s more,a verification experiment on the possible error caused by the wearing mode is carried out,and the results show that the wearing method in front of the chest causes an error of less than 7%of the human eye vertical illuminance test,and the error is within the allowable range for the evaluation of photobiological effects.In terms of system software,a visual platform of Web of Things environment information for real-time monitoring and analysis has been developed,which includes eight kinds of interfaces is developed,such as real-time monitoring data overview interface and human-computer interaction interface,it can clearly display the activity trajectory and environmental exposure.At the mean time,a database of environmental experiences for each subject is established for viewing and downloading data of each subjects’environmental experience;（3）Combining with the smart monitoring system of spatiotemporal environment parameters through following person move,20 subjects with different activity tracks in campus environment were investigated for 4 consecutive days of environmental exposure monitoring to explore the influence of the characteristics of personnel activity trajectory on environmental preference and the causes of individual differences in health exposure risk.Based on the temporal and spatial distribution characteristics of subjects’activity trajectories during the measured period,the characteristic types of crowd activity trajectories were divided into dormitory-office-dormitory type（D-O-D type）,dormitory-library-dormitory type（D-L-D type）and full-time dormitory type（D-D type）.The analysis of the relationship between the exposure characteristics of light and thermal environment and environmental acceptability shows that among people with different activity trajectory types,the more time-consuming people are,the greater the average thermal resistance of clothing is.People who went back to bed at noon（thermal sensation mean=0.50）thought it was warmer in the office environment in the afternoon than those who did not go back to bed（thermal sensation mean=0.00）.The results of correlation analysis between environmental exposure characteristics and health risk showed that in terms of photobiological needs,the proportion of daytime high exposure（rhythm stimulus CS≥0.3 was beneficial light rhythm stimulation）reached 44%and 58%,respectively.Daytime light rhythm stimulation was good,and the proportion of daytime high exposure duration of D-D population was only 20%.Insufficient daytime biological circadian rhythm stimulation will face health risks such as disturbance of circadian rhythm regulation system.The follow-up tests were carried out according to the exposure experiences of PM_2.5 and CO₂of different populations.During the test,the people of type D-D faced the health risks caused by the long-term excessive concentration of CO₂.Due to the regulation and control strategy of windowed ventilation in the office,the proportion of CO₂ exposure reached 39%during the period of exposure,but the concentration of PM_2.5 outside was higher than that of indoor during the test period.At the same time,it caused the phenomenon of taking care of one thing and losing another among the three categories of people in the proportion of 9%of the time taken to reach the standard of PM_2.5.Due to the central air-conditioning system in the daytime study and workplace,the exposure time of CO₂ and PM_2.5 accounted for 63%and 50%respectively.The smart monitoring system of spatiotemporal environment parameters through following person move developed in this paper provides an effective way to monitor personnel’s environmental exposure experience,and it has explored some references in the aspects of exploring the comprehensive impact of persons’clothing,food,housing and transportation on environmental exposure experience.