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Development of a gas nanosensor node powered by solar cells

Malaver Rojas, Jairo Alexander, Motta, Nunzio, Peter, Corke, John, Bell, & Alessandro, Depari (2011) Development of a gas nanosensor node powered by solar cells. In Solar2011, the 49th AuSES Annual Conference, Australian Solar Energy Society, Australian Technology Park, Sidney, NSW.

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Abstract

This work focuses on the development of a stand-alone gas nanosensor node, powered by solar energy to track concentration of polluted gases such as NO2, N2O, and NH3. Gas sensor networks have been widely developed over recent years, but the rise of nanotechnology is allowing the creation of a new range of gas sensors [1] with higher performance, smaller size and an inexpensive manufacturing process. This work has created a gas nanosensor node prototype to evaluate future field performance of this new generation of sensors. The sensor node has four main parts:

(i) solar cells; (ii) control electronics; (iii) gas sensor and sensor board interface [2-4]; and (iv) data transmission.

The station is remotely monitored through wired (ethernet cable) or wireless connection (radio transmitter) [5, 6] in order to evaluate, in real time, the performance of the solar cells and sensor node under different weather conditions. The energy source of the node is a module of polycrystalline silicon solar cells with 410cm2 of active surface. The prototype is equipped with a Resistance-To-Period circuit [2-4] to measure the wide range of resistances (KΩ to GΩ) from the sensor in a simple and accurate way. The system shows high performance on (i) managing the energy from the solar panel, (ii) powering the system load and (iii) recharging the battery. The results show that the prototype is suitable to work with any kind of resistive gas nanosensor and provide useful data for future nanosensor networks.

Impact and interest:

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ID Code: 51456
Item Type: Conference Paper
Keywords: Gas sensors, remote monitoring, silicon solar cells, data transmission
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Current > Research Centres > Science Research Centre
Copyright Owner: Copyright 2011 [please consult the author]
Deposited On: 06 Jul 2012 09:27
Last Modified: 06 Sep 2012 02:30

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