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Sensors 2011, 11(6), 6145-6164; doi:10.3390/s110606145

The Multi-Chamber Electronic Nose—An Improved Olfaction Sensor for Mobile Robotics

1
Department of System Engineering and Automation, University of Malaga, Campus de Teatinos, 29071 Malaga, Spain
2
Department of Civil Engineering, University of Malaga, Campus de Teatinos, 29071 Malaga, Spain
*
Author to whom correspondence should be addressed.
Received: 19 April 2011 / Revised: 19 May 2011 / Accepted: 30 May 2011 / Published: 7 June 2011
(This article belongs to the Section Chemical Sensors)
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Abstract

One of the major disadvantages of the use of Metal Oxide Semiconductor (MOS) technology as a transducer for electronic gas sensing devices (e-noses) is the long recovery period needed after each gas exposure. This severely restricts its usage in applications where the gas concentrations may change rapidly, as in mobile robotic olfaction, where allowing for sensor recovery forces the robot to move at a very low speed, almost incompatible with any practical robot operation. This paper describes the design of a new e-nose which overcomes, to a great extent, such a limitation. The proposed e-nose, called Multi-Chamber Electronic Nose (MCE-nose), comprises several identical sets of MOS sensors accommodated in separate chambers (four in our current prototype), which alternate between sensing and recovery states, providing, as a whole, a device capable of sensing changes in chemical concentrations faster. The utility and performance of the MCE-nose in mobile robotic olfaction is shown through several experiments involving rapid sensing of gas concentration and mobile robot gas mapping.
Keywords: electronic nose; mobile robotic olfaction; gas sensing; Metal Oxide Semiconductor Sensor electronic nose; mobile robotic olfaction; gas sensing; Metal Oxide Semiconductor Sensor
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Gonzalez-Jimenez, J.; Monroy, J.G.; Blanco, J.L. The Multi-Chamber Electronic Nose—An Improved Olfaction Sensor for Mobile Robotics. Sensors 2011, 11, 6145-6164.

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