A three-layer multi-sensor wearable device for physical environmental parameters and NO2 monitoring

The monitoring of the ambient working conditions is a crucial part in occupational medicine. An innovative 3-layer, compact, multi-tasking and efficient wearable system for monitoring environmental conditions including physical and chemical parameters is introduced. It uniquely consists of a microcontroller board with integrated temperature, humidity and barometer sensors (physical parameters-middle layer), add-on board gas sensor (chemical parameter) at the top layer for monitoring hazardous gases in air and a vibration motor placed under the main board (bottom layer). The top layer is easily replaceable with other target gas sensors from the same family. These layers are connected appropriately through a board to board connector. For an early notification of the user about ambient parameters status a haptic feedback pattern is actuated using a micro embedded vibration motor. The real time data are sent to a smartphone simultaneously. The collected data are used to monitor the ambient environment and establish a long-term individual profile for employees in real-time. With this paper we introduce the system architecture. Efficiency, performance and power consumption of such unique multi-layer multi-parameter monitoring device in size and weight are evaluated. Furthermore the comparison with the previous version of this device is provided.

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