Remote sensing of on-road vehicle emissions. Final report
A Fourier Transform Infra-Red (FTIR) spectrometer based remote sensor system has been developed to detect tailpipe, exhaust Carbon Dioxide (CO2), Carbon Monoxide (CO), and Hydrocarbons (HC) from moving on-road motor vehicles in order to identify high polluting vehicles. A secondary project goal was to find if other exhaust gases might also be detected, such as NOx. In field tests, it has been demonstrated that an FTIR system is capable of detecting and quantifying gaseous exhaust emission species from vehicles moving of speeds up to 50 miles per hour. The system was tested in a controlled environment on a parking lot. The measured CO/CO2 ratios correlated well with similar data from other remote sensors. The minimum detection threshold for HC/CO2 ratio was about the same as that of the CO, channel. However, the HC output from most vehicles was below this detection threshold, and therefore the HC channel responded reliably only to high polluting vehicles. With the system sensitivity currently achieved, and with the short collection times required (about one second), CO2, CO and HC were detected, but no other exhaust gases could be identified.
- Research Organization:
- Hughes Environmental Systems, Inc., Manhattan Beach, CA (United States)
- OSTI ID:
- 6468302
- Report Number(s):
- PB-93-200855/XAB; CRC-APRAC-VE--8
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330700* -- Advanced Propulsion Systems-- Emission Control
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION MONITORS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
ECONOMIC ANALYSIS
ECONOMICS
ENVIRONMENT
EXHAUST GASES
EXHAUST SYSTEMS
FIELD TESTS
FLUIDS
GASEOUS WASTES
GASES
HYDROCARBONS
INFRARED SPECTROMETERS
INPUT-OUTPUT ANALYSIS
MEASURING INSTRUMENTS
MONITORS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REMOTE SENSING
RESEARCH PROGRAMS
ROADS
SENSITIVITY
SPECTROMETERS
TESTING
VEHICLES
WASTES