Real-Time Thermal Modulation of High Bandwidth MOX Gas Sensors for Mobile Robot Applications
A new signal processing technique has been developed for resistive metal oxide (MOX) gas sensors to enable high-bandwidth measurements and enhanced selectivity at PPM levels (<5 PPM VOCs). An embedded micro-heater is thermally pulsed from a temperature of 225 to 350 °C, which enables...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-03-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/19/5/1180 |
| _version_ | 1811277860618371072 |
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| author | Yuxin Xing Timothy A. Vincent Marina Cole Julian W. Gardner |
| author_facet | Yuxin Xing Timothy A. Vincent Marina Cole Julian W. Gardner |
| author_sort | Yuxin Xing |
| collection | DOAJ |
| description | A new signal processing technique has been developed for resistive metal oxide (MOX) gas sensors to enable high-bandwidth measurements and enhanced selectivity at PPM levels (<5 PPM VOCs). An embedded micro-heater is thermally pulsed from a temperature of 225 to 350 °C, which enables the chemical reaction kinetics of the sensing film to be extracted using a fast Fourier transform. Signal processing is performed in real-time using a low-cost microcontroller integrated into a sensor module. Three sensors, coated with SnO2, WO3 and NiO respectively, were operated and processed at the same time. This approach enables the removal of long-term baseline drift and is more resilient to changes in ambient temperature. It also greatly reduced the measurement time from ~10 s to 2 s or less. Bench-top experimental results are presented for 0 to 200 ppm of acetone, and 0 ppm to 500 ppm of ethanol. Our results demonstrate our sensor system can be used on a mobile robot for real-time gas sensing. |
| first_indexed | 2024-04-13T00:25:30Z |
| format | Article |
| id | doaj.art-38eb5e37091a4d49bc0d0304003cd94b |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T00:25:30Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-38eb5e37091a4d49bc0d0304003cd94b2022-12-22T03:10:38ZengMDPI AGSensors1424-82202019-03-01195118010.3390/s19051180s19051180Real-Time Thermal Modulation of High Bandwidth MOX Gas Sensors for Mobile Robot ApplicationsYuxin Xing0Timothy A. Vincent1Marina Cole2Julian W. Gardner3School of Engineering, University of Warwick, Coventry CV4 7AL, UKSchool of Engineering, University of Warwick, Coventry CV4 7AL, UKSchool of Engineering, University of Warwick, Coventry CV4 7AL, UKSchool of Engineering, University of Warwick, Coventry CV4 7AL, UKA new signal processing technique has been developed for resistive metal oxide (MOX) gas sensors to enable high-bandwidth measurements and enhanced selectivity at PPM levels (<5 PPM VOCs). An embedded micro-heater is thermally pulsed from a temperature of 225 to 350 °C, which enables the chemical reaction kinetics of the sensing film to be extracted using a fast Fourier transform. Signal processing is performed in real-time using a low-cost microcontroller integrated into a sensor module. Three sensors, coated with SnO2, WO3 and NiO respectively, were operated and processed at the same time. This approach enables the removal of long-term baseline drift and is more resilient to changes in ambient temperature. It also greatly reduced the measurement time from ~10 s to 2 s or less. Bench-top experimental results are presented for 0 to 200 ppm of acetone, and 0 ppm to 500 ppm of ethanol. Our results demonstrate our sensor system can be used on a mobile robot for real-time gas sensing.http://www.mdpi.com/1424-8220/19/5/1180MOXmobile robotthermal modulationhigh-bandwidthinteractive mapping |
| spellingShingle | Yuxin Xing Timothy A. Vincent Marina Cole Julian W. Gardner Real-Time Thermal Modulation of High Bandwidth MOX Gas Sensors for Mobile Robot Applications Sensors MOX mobile robot thermal modulation high-bandwidth interactive mapping |
| title | Real-Time Thermal Modulation of High Bandwidth MOX Gas Sensors for Mobile Robot Applications |
| title_full | Real-Time Thermal Modulation of High Bandwidth MOX Gas Sensors for Mobile Robot Applications |
| title_fullStr | Real-Time Thermal Modulation of High Bandwidth MOX Gas Sensors for Mobile Robot Applications |
| title_full_unstemmed | Real-Time Thermal Modulation of High Bandwidth MOX Gas Sensors for Mobile Robot Applications |
| title_short | Real-Time Thermal Modulation of High Bandwidth MOX Gas Sensors for Mobile Robot Applications |
| title_sort | real time thermal modulation of high bandwidth mox gas sensors for mobile robot applications |
| topic | MOX mobile robot thermal modulation high-bandwidth interactive mapping |
| url | http://www.mdpi.com/1424-8220/19/5/1180 |
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