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Investigation of the response of high-bandwidth MOX sensors to gas plumes for application on a mobile robot in hazardous environments
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Vincent, Timothy A., Xing, Yuxin, Cole, Marina and Gardner, J. W. (2019) Investigation of the response of high-bandwidth MOX sensors to gas plumes for application on a mobile robot in hazardous environments. Sensors and Actuators B: Chemical, 279 . pp. 351-360. doi:10.1016/j.snb.2018.08.125 ISSN 0925-4005.
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WRAP-Investigation-response-high-bandwidth-MOX-sensors-gas-plumes-application-mobile-robot-hazardous-environments-Cole-2018.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (5Mb) | Preview |
Official URL: https://doi.org/10.1016/j.snb.2018.08.125
Abstract
A custom sensor module has been developed comprising high-bandwidth metal oxide (MOX), low-cost non-dispersive infra-red (NDIR) and miniature solidly mounted resonator (SMR) acoustic sensors for use on a mobile exploration robot. The module has been tested in a wind tunnel in order to evaluate the performance of three MOX sensors (with coatings of PdPt SnO2, WO3 and NiO) to plumes of 2-propanol (concentration < 2.5 ppm). The formation of the VOC (volatile organic compound) plumes was verified through mapping of sensor responses across a grid of 9 positions in the wind tunnel. Fluctuating sensor responses were observed (±5%), demonstrating variation of VOC concentration within the gas plumes. Higher sensor responses were demonstrated with the n-type SnO2 and WO3 based devices (80% and 40% change relative to baseline, respectively) compared to the p-type NiO device (10%). Short plumes of VOC demonstrated the effect of gas pulse broadening, where longer duration responses (10% greater) were observed at locations further from the VOC source (∼0.4 m distance variation tested). Finally, the module was tested in a real-world environment, where plumes of VOC were observed using the MOX sensors and verified using a commercial Photoionization Detector (PID).
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > Q Science (General) | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
| Library of Congress Subject Headings (LCSH): | Gas detectors, Mobile robots -- Remote sensors, Volatile organic compounds, Smoke plumes, Metal oxide semiconductors | ||||||||
| Journal or Publication Title: | Sensors and Actuators B: Chemical | ||||||||
| Publisher: | Elsevier | ||||||||
| ISSN: | 0925-4005 | ||||||||
| Official Date: | 15 January 2019 | ||||||||
| Dates: |
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| Volume: | 279 | ||||||||
| Page Range: | pp. 351-360 | ||||||||
| DOI: | 10.1016/j.snb.2018.08.125 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Date of first compliant deposit: | 6 November 2018 | ||||||||
| Date of first compliant Open Access: | 20 September 2019 | ||||||||
| RIOXX Funder/Project Grant: |
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