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An electronic nose employing dual-channel odour separation columns with large chemosensor arrays for advanced odour discrimination
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Harun, F. K. Che, Taylor, J. E., Covington, James A. and Gardner, J. W. (2009) An electronic nose employing dual-channel odour separation columns with large chemosensor arrays for advanced odour discrimination. Sensors and Actuators B: Chemical, Vol.141 (No.1). pp. 134-140. doi:10.1016/j.snb.2009.05.036
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Official URL: http://dx.doi.org/10.1016/j.snb.2009.05.036
Abstract
Here we report on an improved concept for electronic noses (e-noses) that combines three large chemosensor arrays (300 resistive elements per array) with two micro-packages, each containing a column inspired by our study of the human olfactory mucosa and nasal cavity. In this novel system, a sample odour passes over the first chemoresistive array giving "spatial" response data, equivalent to a traditional sensor-based e-nose. The odour is then divided evenly and passes through two further micro-packages (and thus columns) simultaneously. As the odour pulse travels along these columns chemical components within it are selectively delayed, thus the second and third array, placed after the micro-packages, provide both temporal retentive and spatial information. This combination of a front-end sensor array with back-end second and third arrays, coupled with appropriate pattern analysis algorithms, is shown to enhance significantly the system's ability to discriminate between complex odours. The columns were coated with non-polar and polar compounds to maximise the discrimination ability of the system. We believe that this combination of an initial sensor array, creating spatial data with the spatio-temporal data from the second array significantly enhances the ability of e-noses to discriminate complex odours.
| Item Type: | Journal Article | ||||
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| Subjects: | Q Science > QP Physiology T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science > Engineering | ||||
| Library of Congress Subject Headings (LCSH): | Olfactometry, Odors, Chemical detectors | ||||
| Journal or Publication Title: | Sensors and Actuators B: Chemical | ||||
| Publisher: | Elsevier Science S.A. | ||||
| ISSN: | 0925-4005 | ||||
| Official Date: | 18 August 2009 | ||||
| Dates: |
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| Volume: | Vol.141 | ||||
| Number: | No.1 | ||||
| Number of Pages: | 7 | ||||
| Page Range: | pp. 134-140 | ||||
| DOI: | 10.1016/j.snb.2009.05.036 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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