Envirotest Systems Corporation

Environmental Systems Products Holdings Inc.

Envirotest Systems Holdings Corp.

Troy P Bahan

Michael D Jack

David R Nelson

Jay C Peterson

George C Polchin

Jay Peterson

George Charles Polchin

Allen J Paneral

Jeffrey L Hanson

An unmanned integrated RESintegrates all of its components except the reflectorinto a single consolethat is positioned at the side of a road and has a CPUthat controls calibration, verification and data gathering. The RES's sourceand receiverare preferably stacked one on top of the other such that the IR beamtraverses a low and high path as it crosses the roadThis allows the RES to detect both low and high ground clearance vehicles. To maintain the vehicle processing and identification throughput, the speed sensorand ALPRdetect the passing vehicles at steep angles, approximately 20 to 35 degrees. In a preferred system, a manned control centercommunicates with a large number of the unmanned integrated RES to download emissions data, perform remote diagnostics, and, if necessary, dispatch a technician to perform maintenance on a particular RES.

Unmanned integrated optical remote emissions sensor (RES) for motor vehicles

An unmanned integrated RES 12 integrates all of its components except the reflector 22 into a single console 30 that is positioned at the side of a road and has a CPU 36 that controls calibration, verification and data gathering. The RES's source 32 and receiver 34 are preferably stacked one on top of the other such that the IR beam 24 traverses a low and high path as it crosses the road 14. This allows the RES to detect both low and high ground clearance vehicles. To maintain the vehicle processing and identification throughput, the speed sensor 54 and ALPR 48,50 detect the passing vehicles at steep angles, approximately 20 to 35 degrees. In a preferred system, a manned control center 16 communicates with a large number of the unmanned integrated RES to download emissions data, perform remote diagnostics, and, if necessary, dispatch a technician to perform maintenance on a particular RES.

Unmanned integrated optical remote emissions sensor (RES) for motor

An emission-concentration monitoring system (20)includes first and second monitor stations (22,32) which are separated by a sensing space (40) along a path (28) of a moving vehicle (26). Each station has a source of electromagnetic radiation (64) which is directed through the vehicle's exhaust plume. Each station also has a set of detectors (66) which are positioned to receive the radiation and configured to measure transmittances at wavelengths which are absorbed by molecular species of exhaust plume (e.g., hydrocarbons, nitric oxide, carbon monoxide and carbon dioxide). These sensed transmittances are converted to emission concentrations by a data processor (50) and compared to a set of emission-concentration standards. The vehicle is determined to be in violation only if its emission concentrations at both the first and second monitor stations exceeds the standards. To insure visual identification of the vehicle, images of it are formed at both stations with video cameras (42, 44) and a license plate reader (46). It has been found that the monitoring system improves testing accuracy because the first and second stations essentially form a check against each other to remove errors due, for example, to vehicular temporal variabilities.

Systems and methods for determining compliance of moving vehicles with

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Santa Barbara, CA, United States of America

Troy P Bahan