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Drowsy Driver & Child Left Behind - Prevention via in Cabin CO2 Sensing
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Can one technical solution help prevent drowsy drivers and detect a child left behind? Yes, using a single, maintenance-free, Non-Dispersive Infrared (NDIR) gas sensor integrated in the cabin ventilation system.
Carbon dioxide (CO2) is an established proxy for ventilation needs in buildings. Recently, several studies have been published showing a moderate elevation of the indoor carbon dioxide level effect cognitive performance such as information usage, activity, focus and crisis response. A study of airplane pilots using 3-hour flight simulation tests, showed pilots made 50% more mistakes when exposed to 2,500 ppm carbon dioxide compared to 700 ppm.
This has a direct impact on safety.
All living animals and humans exhale carbon dioxide. In our investigations we have found that an unintentionally left behind child, or pet, can easily be detected in a parked car by analyzing the carbon dioxide trends in the cabin. Even an 8-month old baby acts as a carbon dioxide source, increasing cabin CO2 levels at a 20ppm/minute rate allowing for detection within one minute.
Vehicles running with the ventilation system in recirculation mode normally reach above the fresh air limit of 1,000 ppm within a few minutes. The carbon dioxide level normally stabilizes between 3,000 and 10,000 ppm. Levels that will make the driver drowsy, reducing their cognitive performance and impact safety.
Using an NDIR gas sensor in the ventilation system will reduce driver performance degradation due to elevated carbon dioxide levels, allowing reliable detection of any unintentionally left behind children or pets, potentially saving lives.
CitationRödjegård, H., Franchy, M., Ehde, S., Zoubir, Y. et al., "Drowsy Driver & Child Left Behind - Prevention via in Cabin CO2 Sensing," SAE Technical Paper 2020-01-0573, 2020, https://doi.org/10.4271/2020-01-0573.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
- Mathur, G.D. , “Influence of Partial Recirculation on the Build-Up of Cabin Carbon Dioxide Concentrations,” SAE Technical Paper 2019-01-0908, 2019, doi:https://doi.org/10.4271/2019-01-0908.
- Mathur, G. , “Experimental Investigation to Determine Influence of Build-up of Cabin Carbon Dioxide Concentrations for Occupants Fatigue,” SAE Technical Paper 2016-01-0254, 2016, doi:https://doi.org/10.4271/2016-01-0254.
- Zulauf, N. et al. , “Indoor Air Pollution in Cars: An Update on Novel Insights,” Int J. Environ Res Public Health 16(13):E2441, Jul 9, 2019, doi:10.3390/ijerph16132441.
- Grady, M.L. et al. , “Vehicle Cabin Air Quality with Fractional Air Recirculation,” SAE Technical Paper 2013-01-1494, 2013, doi:https://doi.org/10.4271/2013-01-1494.
- Luangprasert, M. et al. , “In-Vehicle Carbon Dioxide Concentration in Commuting Cars in Bangkok, Thailand,” Journal of the Air & Waste Management Association 67(5):623-633, 2017, doi:10.1080/10962247.2016.1268983.
- EFA , “BB 101 Guidelines on Ventilation Thermal Comfort and Indoor Air Quality in Schools,” 2018.
- DOSH , “Industry Code of Practice on Indoor Air Quality,” Minist. Hum. Resour. Dep. Occup. Saf. Heal 1:-50, 2010.
- Heyman, E. , “Bidrag till kännedomen om luftens beskaffenhet i skolor,” Nordiskt medicinskt arkiv, Band XII, N:r 2, Stockholm, Sweden, 1879.
- Wigley, T.M.L. , “Climatic Change,” 5: 315, 1983, https://doi.org/10.1007/BF02423528.
- ASHRAE , “ANSI/ASHRAE Standard 62.1-2007 Ventilation for Acceptable Indoor Air Quality,” Atlanta, GA, 2007.
- Allen, J.G. et al. , “Associations of Cognitive Function Scores with Carbon Dioxide, Ventilation, and Volatile Organic Compound Exposures in Office Workers: A Controlled Exposure Study of Green and Conventional Office Environments,” Environ Health Perspect. 124(6):805-812, 2016 Jun, doi:10.1289/ehp.1510037.
- Cha, Y. , “In-Cabin Carbon Dioxide and Health Effects,” 2019, 10.13140/RG.2.2.22676.86405.
- OSHA , “Permissible Exposure Limits for Chemical Contaminants - Annotated Tables,” Occupational Safety and Health Administration. Retrieved March 31, 2019, https://www.osha.gov/dsg/annotated-pels/tablez-1.html.
- FSIS ESHG , “Carbon Dioxide Health Hazard Information Sheet,” https://www.fsis.usda.gov/wps/wcm/connect/bf97edac-77be-4442-aea4-9d2615f376e0/Carbon-Dioxide.pdf?MOD=AJPERES.
- Allen, J.G. et al. , “Airplane Pilot Flight Performance on 21 Maneuvers in a Flight Simulator under Varying Carbon Dioxide Concentrations,” Journal of Exposure Science & Environmental Epidemiology, August 2018, doi:10.1038/s41370-018-0055-8.
- Thom, S.R. et al. , “Increased Carbon Dioxide Levels Stimulate Neutrophils to Produce Microparticles and Activate the Nucleotide-Binding Domain-Like Receptor 3 Inflammasome,” Free Radic Biol Med 106:406-416, 2017.
- Griffin, D.P. , “Occupant Safety System with co2 Detection,” Patent US20160103111, 2014.
- Hadden, T. , “Thermal Storage for Electric Vehicle Cabin Heating in Cold Weather Conditions,” 2017.