University of Hertfordshire

Energy Harvesting From Ambient Vibration For Remote Vibration Monitoring With A Self-powered Nanotube Based Sensor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Farbod Khoshnoud
  • Clarence W. de Silva
  • Houman Owhadi
  • Carlos E. Ventura
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Original languageEnglish
Title of host publicationProcs 2011 Canadian Congress of Applied Mechanics (2011 CANCAM)
Publication statusPublished - 2011
EventCanadian Congress of Applied Mechanics 2011 - Vancouver, Canada
Duration: 5 Jun 20119 Jun 2011


ConferenceCanadian Congress of Applied Mechanics 2011


Harvesting energy from ambient vibration in the context of
supplying power to a sensor for remote vibration monitoring is
presented in this paper. The sensor is powered by the same
vibration that is being measured. A transducer, which converts
mechanical energy of the structural vibration to electrical
energy, powers the system. The transducer which represents
the energy supply component in the system is considered as an
electro-magnetic scheme with a moving magnet and a coil.
The power obtained from the harvested energy is supplied to a
nano-electromechanical capacitive sensor. In this sensor,
vibration sensing is carried out by detecting the oscillations of
Carbon Nanotubes (CNTs). The CNTs are excited when they
are subjected to a base motion corresponding to the measured
vibration. Acquisition of the sensor signal is performed by a
capacitance circuit, using the electric charge generated in the
CNTs. A modulation in the CNT’s charge, due to changes in
the capacitance, leads to a modulation in the CNT’s
conductance. This device is particularly useful for precise and
effective wireless sensing of vibration and structural condition
monitoring in hostile or inaccessible environments with little
or no maintenance.

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