alexa Wearable autonomous microsystem with electrochemical gas sensor array for real-time health and safety monitoring.
Engineering

Engineering

Journal of Electrical & Electronic Systems

Author(s): Haitao Li, Xiaoyi Mu, Yuning Yang, Andrew J Mason, Li H, Mu X, Wang Z, Liu X, Guo M,

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Abstract Airborne pollution and explosive gases threaten human health and occupational safety, therefore generating high demand for a wearable autonomous multi-analyte gas sensor system for real-time environmental monitoring. This paper presents a system level solution through synergistic integration of sensors, electronics, and data analysis algorithms. Electrochemical sensors featuring ionic liquids were chosen to provide low-power room-temperature operation, rapid response, high sensitivity, good selectivity, and a long operating life with low maintenance. The system utilizes a multi-mode electrochemical instrumentation circuit that combines all signal condition functions within a single microelectronics chip to minimize system cost, size and power consumption. Embedded sensor array signal processing algorithms enable gas classification and concentration estimation within a real-world mixture of analytes. System design and integration methodologies are described, and preliminary results are shown for a first generation SO(2) sensor and a thumb-drive sized prototype system. This article was published in Conf Proc IEEE Eng Med Biol Soc and referenced in Journal of Electrical & Electronic Systems

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