Development of a portable remote sensing system for measurement of diesel emissions from passing diesel trucks.
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2011-04-08
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Edition:Final report.
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Abstract:A wireless remote-sensing system has been developed for measurement of NOx and particulate matters (PM) emissions from passing diesel trucks. The NOx measurement system has a UV light source with quartz fiber optics that focused the light source into a spectrometer. The signals from the spectrometer was routed through a wireless antenna to a remote computer and NOx measurements were performed by comparing the spectra of the receiving signals to a reference spectrum for compliance. Laboratory measurements were performed with the exhaust of a stationary 3-cylinder diesel engine and field tests were with a diesel-powered forklift truck. Results of the remote sensing system were compared with direct exhaust measurements. For NOx measurement, comparing the variance of the spectrum between the 200-300 nm wavelengths with direct diesel engine exhaust measurement, an approximate NOx/variance ratio of 0.5 was found for the stationary measurement and ratios of 0.3-0.4 were obtained for transient measurements.
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