Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2000-11-03
2004-04-20
Hannaher, Constantine (Department: 2878)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
C250S338500, C250S339110
Reexamination Certificate
active
06723989
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a remote emissions sensing system and method that uses a composite detector beam of infrared (IR) and ultraviolet (UV) radiation. The detector beam is used to perform spectroscopic measurements upon an emissions source and the beam is not split during detection.
BACKGROUND OF THE INVENTION
Remote emissions sensing systems generally are known. One such system comprises a source of electromagnetic radiation arranged to pass a beam of radiation through the exhaust plume of a motor vehicle as the motor vehicle passes by the system, and one or more detectors arranged to receive the radiation after it passes through the exhaust plume of the vehicle. Filters may be associated with one or more detectors to detect the intensity of electromagnetic radiation at a particular wavelength or range of wavelengths. The wavelengths may be selected to correspond to wavelengths absorbed by molecular species of interest in an exhaust plume (e.g., HC, CO, CO
2
, NO
x
, or other molecular species). The detector's output voltage represents the intensity of the electromagnetic radiation measured by that detector. The voltages are input to a processor. The processor calculates the difference between the known intensity of the electromagnetic radiation source and the intensity detected by the detectors to determine the amount of absorption by particular molecular species (based on predetermined wavelengths with that species). Based on the measured absorption(s), the concentration of one or more molecular species in the emissions may be determined in a known manner. Such systems generally take a plurality of measurements (e.g., 50) over a predetermined period of time (e.g., 0.5 seconds). These measurements are then plotted and analyzed to determine concentrations of target emissions. When using a plurality of measurements, however, if one or more measurements are inaccurate, concentration calculations may be erroneous or invalid. For various reasons, inaccuracies can occur when remotely sensing emissions.
Some remote emission sensing systems do not have the capability to detect nitrous oxides (NO
x
). Other systems detect NO
x
with a UV beam and other molecular species with an IR beam. In one such system, the UV and IR beams are split into separate beams at the detector module. One reason for this splitting is that unequal detection times have been believed necessary for the UV and IR portions of the beam. For example, a longer UV detection time has been believed necessary to ensure adequate NO
x
detector signal. One problem with such a system is that unequal detection times require additional system elements which increase the difficulty in aligning the system. Other drawbacks exist.
SUMMARY OF THE INVENTION
One object of the invention is to overcome these and other drawbacks of existing systems.
Another object of the invention is to provide a remote emissions sensing system and method with a composite beam of IR and UV radiation that detects NO
x
and at least one other molecular species, where the alignment of the system is relatively easier than the alignment of a system wherein the UV and IR beams are split for detection.
Another object of the invention is to provide a remote emissions sensing system and method with a composite beam of IR and UV radiation that is not split for detection.
Another object of the invention is to provide a remote emissions sensing system and method with a composite beam of IR and UV radiation that detects NO
x
and at least one other molecular species, where the composite beam is alternately incident upon a NO
x
detector and a detector for the at least one other molecular species.
REFERENCES:
patent: 2930893 (1960-03-01), Lane et al.
patent: 3143648 (1964-08-01), Bradley et al.
patent: 3171027 (1965-02-01), Wallack
patent: 3517190 (1970-06-01), Astheimer
patent: 3593023 (1971-07-01), Dodson et al.
patent: 3630072 (1971-12-01), Traver
patent: 3696247 (1972-10-01), McIntosh et al.
patent: 3743426 (1973-07-01), Steinberg
patent: 3761715 (1973-09-01), Menzies
patent: 3761724 (1973-09-01), Dennis
patent: 3766380 (1973-10-01), Menzies
patent: 3841763 (1974-10-01), Lewis
patent: 3849005 (1974-11-01), Girard et al.
patent: 3891848 (1975-06-01), Fletcher et al.
patent: 3908167 (1975-09-01), Hadden et al.
patent: 3931462 (1976-01-01), Exton
patent: 3957372 (1976-05-01), Cross et al.
patent: 3958122 (1976-05-01), Cross et al.
patent: 3973848 (1976-08-01), Jowett et al.
patent: 3976884 (1976-08-01), Acton et al.
patent: 4135092 (1979-01-01), Milly
patent: 4160373 (1979-07-01), Cross et al.
patent: 4204121 (1980-05-01), Milly
patent: 4204768 (1980-05-01), N'Guyen
patent: 4323777 (1982-04-01), Baskins
patent: 4390785 (1983-06-01), Faulhaber et al.
patent: 4420687 (1983-12-01), Martinez et al.
patent: 4426640 (1984-01-01), Becconsall et al.
patent: 4477190 (1984-10-01), Liston et al.
patent: 4480191 (1984-10-01), Karpowycz
patent: 4489239 (1984-12-01), Grant et al.
patent: 4490043 (1984-12-01), Cramp
patent: 4490613 (1984-12-01), Brame
patent: 4492862 (1985-01-01), Grynberg et al.
patent: 4496839 (1985-01-01), Berstein et al.
patent: 4516858 (1985-05-01), Gelbwachs
patent: 4544273 (1985-10-01), Berndt
patent: 4553032 (1985-11-01), Borken et al.
patent: 4560873 (1985-12-01), McGowan et al.
patent: 4663961 (1987-05-01), Nelson et al.
patent: 4707603 (1987-11-01), Jaatinen et al.
patent: 4710630 (1987-12-01), Kuppenheimer et al.
patent: 4719360 (1988-01-01), Kontani et al.
patent: 4746218 (1988-05-01), Lord
patent: 4765961 (1988-08-01), Schiff et al.
patent: 4771176 (1988-09-01), Schiefer et al.
patent: 4795253 (1989-01-01), Sandridge et al.
patent: 4798464 (1989-01-01), Boostrom
patent: 4810884 (1989-03-01), Carlson
patent: 4818705 (1989-04-01), Schneider et al.
patent: 4829183 (1989-05-01), McClatchie et al.
patent: 4875084 (1989-10-01), Tohyama
patent: 4902889 (1990-02-01), Sodi
patent: 4924095 (1990-05-01), Swanson, Jr.
patent: 4990780 (1991-02-01), Lee et al.
patent: 4999498 (1991-03-01), Hunt et al.
patent: 5041723 (1991-08-01), Ishida et al.
patent: 5055685 (1991-10-01), Sugimoto
patent: 5055697 (1991-10-01), Manoogian et al.
patent: 5060505 (1991-10-01), Tury et al.
patent: 5099680 (1992-03-01), Fournier et al.
patent: 5105651 (1992-04-01), Gutmann
patent: 5129257 (1992-07-01), Carduner et al.
patent: 5157258 (1992-10-01), Gunning, III et al.
patent: 5184017 (1993-02-01), Tury et al.
patent: 5189677 (1993-02-01), Yry
patent: 5210702 (1993-05-01), Bishop et al.
patent: 5210765 (1993-05-01), Flint et al.
patent: 5246868 (1993-09-01), Busch et al.
patent: 5252828 (1993-10-01), Kert et al.
patent: 5294796 (1994-03-01), Fee
patent: 5306913 (1994-04-01), Noack et al.
patent: 5319199 (1994-06-01), Stedman et al.
patent: 5325380 (1994-06-01), Clendening et al.
patent: 5325393 (1994-06-01), Nighan et al.
patent: 5327356 (1994-07-01), Lang et al.
patent: 5332901 (1994-07-01), Eckles et al.
patent: 5343043 (1994-08-01), Johnson
patent: 5371367 (1994-12-01), DiDomenico et al.
patent: 5373160 (1994-12-01), Taylor
patent: 5386373 (1995-01-01), Keeler et al.
patent: 5401967 (1995-03-01), Stedman et al.
patent: 5418366 (1995-05-01), Rubin et al.
patent: 5424543 (1995-06-01), Dombrowski et al.
patent: 5451787 (1995-09-01), Taylor
patent: 5489777 (1996-02-01), Stedman et al.
patent: 5498872 (1996-03-01), Stedman et al.
patent: 5563420 (1996-10-01), Sullivan et al.
patent: 5572424 (1996-11-01), Kellogg et al.
patent: 5583765 (1996-12-01), Kleehammer
patent: 5589629 (1996-12-01), Quinn
patent: 5591975 (1997-01-01), Jack et al.
patent: 5621166 (1997-04-01), Butler
patent: 5644133 (1997-07-01), Didomenico et al.
patent: 5693872 (1997-12-01), Quinn
patent: 5719396 (1998-02-01), Jack et al.
patent: 5726450 (1998-03-01), Peterson et al.
patent: 5731510 (1998-03-01), Jones et al.
patent: 5753185 (1998-05-01), Mathews et al.
patent: 5831267 (1998-11-01), Jack et al.
patent: 6307201 (2001-10-01), DiDomenico et al.
Guenther, Paul L., et al., “A Hydrocarbon Detector for the Remote Sensing of Vehicle Exhaust Emissions”,Review of Scientific Instrume
Didomenico John
Rendahl Craig S.
Envirotest Systems Corporation
Gabor Otilia
Hannaher Constantine
Mintz Levin Cohn Ferris Glovsky and Popeo PC
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