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Development of an auto-calibrated interfacing circuit for thick film multi-gas sensor


Khakpour, Reza and Hamidon, Mohd Nizar and Vandenbosch, Guy A. E. (2013) Development of an auto-calibrated interfacing circuit for thick film multi-gas sensor. Sensors and Actuators A: Physical, 204. pp. 48-57. ISSN 0924-4247; ESSN: 1873-3069


A simple, cheap, and integrated architecture is introduced to measure gases with a thick film gas sensor. The temperatures of the sensors are stabilized by controlling the heaters of the sensors. The heaters’ temperatures are measured by sampling the heaters resistance through the use of a voltage divider and ADCs. A microcontroller accordingly adjusts the output of DACs in order to apply the appropriate steering voltage to the heaters. The method employed to measure the gases is to sample the voltage drop over the resistances of the sensors, which are depending on the gases, by ADCs. The innovation lies in the simplicity of the design and the use of different simple methods and commercially available technologies to fabricate the circuit. Also, a single microcontroller is used to drive and control the heaters’ temperature, to compensate ambient temperature of the heaters, to measure and monitor the amount of gases detected by sensors and finally, to select the sensors. This opens the possibility to use these gas sensors for monitoring purposes at a large scale, for example in alarms and computers.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1016/j.sna.2013.09.032
Publisher: Elsevier
Keywords: Gas sensor; Driving heater; Ambient temperature; Auto calibration; Measuring gases densities
Depositing User: Nabilah Mustapa
Date Deposited: 25 Jul 2015 01:33
Last Modified: 18 Sep 2015 00:40
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.sna.2013.09.032
URI: http://psasir.upm.edu.my/id/eprint/28741
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