期刊
WIRELESS PERSONAL COMMUNICATIONS
卷 116, 期 4, 页码 3143-3164出版社
SPRINGER
DOI: 10.1007/s11277-020-07840-y
关键词
Wearable sensor system; Healthcare monitoring; Energy harvesting; Super-capacitors; Photovoltaic (PV); Bluetooth low energy (BLE)
This paper presents a wearable medical sensor system and develops a photovoltaic-thermoelectric hybrid energy harvester to extend its lifespan. Experimental results show that the system consumes an average power of 2.13 mW in active-sleep mode and can run for 46 hours without using the energy harvester.
In this paper, a wearable medical sensor system is designed for long-term healthcare applications. This system is used for monitoring temperature, heartbeat, blood oxygen saturation (SpO(2)), and the acceleration of a human body in real-time. This system consists of a temperature sensor, a pulse oximeter sensor, an accelerometer sensor, a microcontroller unit, and a Bluetooth low energy module. Batteries are needed for supplying energy to this sensor system, but batteries have a limited lifetime. Therefore, a photovoltaic-thermoelectric hybrid energy harvester is developed to power a wearable medical sensor system. This harvester provides sufficient energy and increases the lifetime of the sensor system. The proposed hybrid energy harvester is composed of a flexible photovoltaic panel, a thermoelectric generator module, a DC-DC boost converter, and two super-capacitors. Experimentally, in active-sleep mode, the sensor system consumes an average power of 2.13 mW over 1 h and works without the energy harvester for 46 h. Finally, the experimental results illustrate the sustainable and long-term monitoring operation for the medical sensor system.
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