Apparatus for remote analysis of vehicle emissions using reflect

Details Apparatus for remote analysis of vehicle emissions using reflect Apparatus for remote analysis of vehicle emissions using reflect

1995-03-03

1996-02-06

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250330, 25033913, 250342, G01N 2101, G01N 2117

Patent

active

054897777

ABSTRACT:
A system for remote analysis of vehicle emissions also determines whether each vehicle's engine and exhaust system are hot or cold by measuring infrared radiation reflected by the roadway beneath the vehicle. A source transmits a beam of radiation through at least a portion of the motor vehicle exhaust to a number of sensors. Each sensor generates a signal indicative of the absorption of the beam in a wavelength band indicative of a corresponding exhaust gas (e.g., CO, CO.sub.2, HC, NO.sub.x and H.sub.2 O). An infrared detector measures infrared radiation within a field of view including at least a portion of the roadway beneath each passing vehicle. A processor then computes the concentrations of each exhaust gas from the sensor signals, and determines whether the vehicle is hot or cold by measuring the intensity of infrared radiation detected by the infrared detector. Because cold vehicles can temporarily produce abnormally high pollution emissions, the processor can be programmed to separately identify hot vehicles having exhaust emissions that exceed air pollution limits. The system can also include a video camera and recorder to record the license plate and emissions data for each vehicle identified as failing to meet emissions limits.

REFERENCES:
patent: 3958122 (1976-05-01), Jowett et al.
patent: 3973848 (1976-08-01), Jowett et al.
patent: 4160373 (1979-07-01), Fastaia et al.
patent: 4348732 (1982-09-01), Kreft
patent: 4432316 (1984-02-01), Ogita
patent: 4924095 (1990-05-01), Swanson, Jr.
patent: 5002391 (1991-03-01), Wolfrum et al.
patent: 5210702 (1993-05-01), Bishop et al.
patent: 5255511 (1993-10-01), Maus et al.
patent: 5307626 (1994-05-01), Maus et al.
patent: 5319199 (1994-06-01), Stedman et al.
patent: 5401967 (1995-03-01), Stedman et al.
Barnes Engineering Company, "Barnes Infrared Camera", Bulletin 12-600, pp. 1-12.
"Automobile Carbon Monoxide Emission" Environmental Science Technology, v. 23, pp. 147-149, 1989.
"IR Long-Path Photometry: A Remote Sensing Tool for Automobile Emissions", Analytical Chem., v. 61, pp. 671A-676S, 1989.
"The Remote Measurement of Traffic Generated Carbon Monoxide", J. Air Pollution Control Association, v. 33, pp. 220-222, 1983.

Affiliated with

Also associated with

Rating

Apparatus for remote analysis of vehicle emissions using reflect does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for remote analysis of vehicle emissions using reflect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for remote analysis of vehicle emissions using reflect will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2176637