An electronic nose employing dual-channel odour separation columns with large chemosensor arrays for advanced odour discrimination
Harun, F. K. Che, Taylor, J. E., Covington, James A., 1973- and Gardner, J. W. (Julian W.), 1958-. (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. ISSN 0925-4005Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/j.snb.2009.05.036
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|
|Subjects:||Q Science > QP Physiology
T Technology > TK Electrical engineering. Electronics Nuclear engineering
|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.|
|Date:||18 August 2009|
|Number of Pages:||7|
|Page Range:||pp. 134-140|
|Access rights to Published version:||Restricted or Subscription Access|
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