Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1994-10-05
1997-01-07
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2503385, 25033912, 25033913, 356436, 356438, G01N 2125, G01N 2135
Patent
active
055919758
ABSTRACT:
A light source radiates an infrared beam that passes through a chopper, a calibration cell and the exhaust plume of a motor vehicle passing in front of the source. A photosensor assembly includes a plurality of photodetectors which are spaced closely adjacent to each other and simultaneously sense the beam after it propagates through the plume. An optical beam homogenizer or integrator disposed between the plume and the photosensor unit causes the light incident on the photodetectors to have uniform intensity. The photodetectors are sensitive to different wavelengths corresponding to spectral absorption peaks of constituents of the composition of the plume, including carbon monoxide (CO), carbon dioxide (CO.sub.2), hydrocarbon (HC), water vapor (H.sub.2 O) and nitric oxide (NO). A computer computes the composition of the plume as the percentages of the constituents based on the sensed transmittances of the respective wavelengths through the plume. A video camera produces a video image of the vehicle license plate, which is displayed on a video monitor and recorded on a video recorder together with the plume composition data.
REFERENCES:
patent: 3696247 (1972-11-01), McIntosh et al.
patent: 3973118 (1976-08-01), LaMontagne
patent: 4204768 (1980-05-01), N'Guyen
patent: 4560873 (1985-12-01), McGowan et al.
patent: 4632563 (1986-12-01), Lord, III
patent: 4638345 (1987-01-01), Elabd et al.
patent: 4710630 (1987-12-01), Kuppenheimier, Jr. et al
patent: 4829183 (1989-05-01), McCiatchie et al.
patent: 4868622 (1989-09-01), Shigenaka
patent: 4875084 (1989-10-01), Yohyama
patent: 4924095 (1990-05-01), Swanson, Jr.
patent: 5041723 (1991-08-01), Ishida et al.
patent: 5157258 (1992-10-01), Gunning, III et al.
patent: 5185648 (1993-02-01), Baker et al.
patent: 5210702 (1993-05-01), Bishop et al.
patent: 5252828 (1993-10-01), Kert et al.
patent: 5254858 (1993-10-01), Wolfman et al.
patent: 5319199 (1994-06-01), Stedman et al.
patent: 5332901 (1994-07-01), Eckles et al.
patent: 5418366 (1995-05-01), Rubin et al.
Stedman, Donald H. "Automobile carbon monoxide emission", 1989, Environ. Sci. Technol. vol. 23, No. 2, pp. 174-149.
Bishop, G. et al., "Analytical Approach --IR Long-Path Photometry: A Remote Sensing Tool for Automotive Emissions", Analytical Chemistry 1989, 61, 617A.
Stevens, R. K. and Teri L. Vossler, "DOAS urban pollution measurements", SPIE vol. 1433, Measurement of Atmospheric Gases, 1991, pp. 25-35.
Stephens, Robert D. and Steven H. Cadle, "Remote sensing measurements of carbon monoxide emissions from on-road vehicles", Jan. 1991, J. Air & Waste Manage, vol. 41, No. 1, pp. 39-46.
Chaney, Lucian W., "The remote measurement of traffic generated carbon monoxide", Mar. 1993, vol. 33, No. 3, J. Air Pollution Control Association, pp. 220-222.
Peterson, James E. et al., "Find and Fix the Polluters" Chemtech, Jan. 1992, pp. 47-53.
Jack Michael D.
Nelson David R.
Rubin Lane H.
Santana Jose A.
Stephens Robert D.
Denson-Low W. K.
Glick Edward J.
Hannaher Constantine
Santa Barbara Research Center
Schubert W. C.
LandOfFree
Optical sensing apparatus for remotely measuring exhaust gas com does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical sensing apparatus for remotely measuring exhaust gas com, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical sensing apparatus for remotely measuring exhaust gas com will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1766434