On the design of an energy-harvesting noise-sensing WSN mote

Wilson M. Tan, Stephen A. Jarvis

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Wireless sensor networks (WSNs) could potentially help in the measurement and monitoring of noise levels, an important step in mitigating and fighting noise pollution. Unfortunately, the high energy required by the noise measurement process and the reliance of sensor motes on batteries make the management of noise-sensing WSNs cumbersome. Giving motes energy harvesting (EH) capabilities could alleviate such a problem, and several EH-WSNs have already been demonstrated. Nevertheless, the high-frequency nature of the data required to measure noise places significant additional challenges to the design of EH-WSNs. In this paper, we present a design and prototype for a mote extension which enables the mote to detect noise levels while being powered by energy harvesting. The noise level detection carried out by the system relies primarily on the concept of peak detection. Results of performance testing are presented. Aside from the hardware design and prototype, we also discuss methods of assigning charge times for application scenarios where there are multiple pulse loads. We also propose a new opportunistic method for charge time determination. Experiments demonstrate that the new method could improve analytically-derived duty cycles by at least 350%.

Original languageEnglish
Article number167
JournalEurasip Journal on Wireless Communications and Networking
Volume2014
Issue number1
DOIs
Publication statusPublished - 1 Dec 2014

Keywords

  • Acoustics
  • Energy harvesting
  • Noise
  • Wireless sensor networks

ASJC Scopus subject areas

  • Signal Processing
  • Computer Science Applications
  • Computer Networks and Communications

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