Preprint Article Version 1 NOT YET PEER-REVIEWED

Design Methodology for an Energy Neutral Health Monitoring Wireless Sensor Node

  1. VLSI and Embedded Research, DA-IICT, Gandhinagar, Gujarat 382007, INDIA
Version 1 : Received: 22 July 2016 / Approved: 22 July 2016 / Online: 22 July 2016 (15:14:29 CEST)

How to cite: Pokhara, A.; Mishra, B. Design Methodology for an Energy Neutral Health Monitoring Wireless Sensor Node. Preprints 2016, 2016070067 (doi: 10.20944/preprints201607.0067.v1). Pokhara, A.; Mishra, B. Design Methodology for an Energy Neutral Health Monitoring Wireless Sensor Node. Preprints 2016, 2016070067 (doi: 10.20944/preprints201607.0067.v1).

Abstract

This paper investigates an Energy Neutral System using Micro Energy Harvesters for a Health Monitoring Wireless Sensor Node (HM-WSN). We have implemented HM-WSN consisting of a solar cell energy harvester, a Power Management Unit (PMU) and the ucontroller, sensor and transmitter acting as load. A battery extender and a switching logic circuit for sensor node is designed to evaluate the efficiency of the proposed system. The HM-WSN senses body temperature with improvement in lifetime of coincell. The HM-WSN is built using commercially available off the shelf (COTS components and consumes 47.2uW for data being updated every 134s. It can be operated for approximately 1.32 years only on a coincell. Furthermore, the HM-WSN can be operated with solar energy at 200lux, achieving 96.36 years with a combination of a coincell with an additional capacitor of 2.2mF. It attains 4.07 years to 16.87 years lifetime with the load capacitor varying from 1mF to 1.5mF at 350lux lighting condition. With the same ambient condition and a 2mF load capacitor, HM-WSN attains complete energy autonomy.

Subject Areas

Energy Harvester, Neutrality, Perpetual, COTS, Health Monitoring WSN

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