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. 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. 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.|
|Official Date:||18 August 2009|
|Number of Pages:||7|
|Page Range:||pp. 134-140|
|Access rights to Published version:||Restricted or Subscription Access|
Actions (login required)