Wearable autonomous microsystem with electrochemical gas sensor array for real-time health and safety monitoring.
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.
Electrical and Computer Engineering, Michigan State Univ., East Lansing, MI, USA.
Haitao
H
Li
Xiaoyi
X
Mu
Zhe
Z
Wang
Xiaowen
X
Liu
Min
M
Guo
Rong
R
Jin
Xiangqun
X
Zeng
Andrew J
AJ
Mason
D000393:Air Pollutants / Q000032:analysis*; D000465:Algorithms; D003199:Computer Systems; D055664:Electrochemical Techniques / Q000295:instrumentation; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000706:statistics & numerical data; D004867:Equipment Design; D053834:Explosive Agents / Q000032:analysis; D006801:Humans; D013458:Sulfur Dioxide / Q000032:analysis
D000393:Air Pollutants; D053834:Explosive Agents; D013458:Sulfur Dioxide