Personal Environmental Monitoring System and network platform

In recent years, air pollution has become a critical social problem because harmful materials can cause disease and death to humans as well as damage to other living organisms, including food crops, or the natural or built environment. Many countries have attempted to reduce air pollution through various means. This paper presents a Personal Environmental Monitoring System (PEMS) and a Wearable Environmental Monitoring System (WEMS) that were developed by considering consumers' needs to detect and avoid exposure to air pollution. The systems include multiple gas sensors which are based on a semiconductor-based heater. This paper presents a design for a new system that incorporates digital hardware and analogue circuits. Basically, MOS (metal oxide semiconductor)-based gas sensors, mostly used in the market, consume a large amount of energy and have a low accuracy. The proposed system provides sensor calibration and communication to conserve energy and improve the accuracy of the sensor data. In addition, systems are connected to the Internet via Wi-Fi or user's Smartphone and can be connected to other machines for Internet of Things (IoT). This paper also presents the network platform for the PEMS and the WEMS.