Abstract
Indoor air pollutants e.g., Carbon dioxide (CO2), Particulate Matter(PM)2.5, PM10, Total Volatile Organic Compounds (TVOC), etc. have a serious impact on human health. Out of these pollutants, CO2 is one of the most dominant one. Hence, proper monitoring and control of this pollutant is an important part of maintaining a healthy indoor. To make this happen, it is required to predict the next moment’s indoor pollutant level at an acceptable accuracy range that ensures necessary steps can be taken beforehand to avoid a rise in the indoor pollution level for maintaining a healthy indoor all the time. It also helps people plan ahead, decreases the adverse effects on health and the costs associated. For this experiment, we have collected three months of real-life time-series data along with proper context information and have gone through feature engineering and feature selection process to create model ready data. Now, since the indoor CO2 concentration is dependent on multiple external factors (context data) which in turn is dependent on time, makes it a time-dependent function. Hence, to predict the indoor pollutant CO2, here we have used the time series forecasting model based on our collected data nature. This is a powerful tool and used in a wide range of research domains for predicting the next moment’s target value. This model ready data is utilized in forecasting different time series models. According to our findings, among the selected popular time series models, the SARIMAX time series model is best suited for this forecasting problem which is utilizing indoor context information along with historical data (with 10 Fold Time-Series Split Cross-Validation score 0.907). We have achieved an average of RMSE 26.45 ppm (i.e., 97.36% accuracy) level based on a three day average for indoor pollutant prediction which is outperforming other relevant models in this domain.
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Acknowledgements
The research work of Joy Dutta is funded by “Visvesvaraya PhD Scheme, Ministry of Electronics & IT, Government of India”. This research work is also supported by the project entitled “Participatory and Realtime Pollution Monitoring System For Smart Cit”, funded by Higher Education, Science & Technology and Biotechnology, Department of Science & Technology, Government of West Bengal, India.
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Dutta, J., Roy, S. IndoorSense: context based indoor pollutant prediction using SARIMAX model. Multimed Tools Appl 80, 19989–20018 (2021). https://doi.org/10.1007/s11042-021-10666-w
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DOI: https://doi.org/10.1007/s11042-021-10666-w