Method and system for remote exhaust emission measurement
First Claim
1. A remote vehicle emissions measurement system comprising:
- a radiation source for emitting a light beam of a set of predetermined wavelength bands through an emission plume of a vehicle;
an adaptable radiation detection unit comprising a plurality of detachable and expandable detecting elements, the plurality of detecting elements adapted to simultaneously receive the set of predetermined wavelength bands passing through the emission plume and produce a plurality of corresponding responses concurrently at any one time instant as required, the plurality of detachable and expandable detecting elements being grouped together in a compact manner;
a processing unit interconnects with the radiation detection unit for analyzing and processing the data collected by the radiation detection unit, the processing unit comprising one or more specific software and hardware for calculating the concentrations of various gas components thereof, the relative ratio of one gas component to the others, or the absolute emission values of each of the gas components thereof; and
means for checking whether there is any transient change between CO and NOx to determine if the vehicle is in transient mode for the elimination of unwanted erroneous data points.
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Accused Products
Abstract
A remote vehicle emissions measurement system including a radiation source, an adaptable radiation detection unit and a processing unit, characterized in that the radiation source includes an infrared source, an ultraviolet source or a combination thereof; the radiation detection unit includes one or more detachable and expandable detecting elements for receiving the set of predetermined wavelength bands and producing a plurality of corresponding responses concurrently at any one time instant; and the processing unit includes one or more specific software and hardware for calculating the concentrations of various gas components thereof, the relative ratio of one gas component to the others, or the absolute emission values of each of the gas components thereof in an accurate and practicable manner.
28 Citations
19 Claims
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1. A remote vehicle emissions measurement system comprising:
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a radiation source for emitting a light beam of a set of predetermined wavelength bands through an emission plume of a vehicle; an adaptable radiation detection unit comprising a plurality of detachable and expandable detecting elements, the plurality of detecting elements adapted to simultaneously receive the set of predetermined wavelength bands passing through the emission plume and produce a plurality of corresponding responses concurrently at any one time instant as required, the plurality of detachable and expandable detecting elements being grouped together in a compact manner; a processing unit interconnects with the radiation detection unit for analyzing and processing the data collected by the radiation detection unit, the processing unit comprising one or more specific software and hardware for calculating the concentrations of various gas components thereof, the relative ratio of one gas component to the others, or the absolute emission values of each of the gas components thereof; and means for checking whether there is any transient change between CO and NOx to determine if the vehicle is in transient mode for the elimination of unwanted erroneous data points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of remote sensing the emissions of a vehicle without being affected by the transient operation of the ECU, comprising the steps of:
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gathering a predetermined number of data points relative to an emission plume of the vehicle with one or more remote vehicle emissions measurement system; checking whether there is any transient change between CO and NOX to determine if the vehicle is in transient mode for the elimination of unwanted erroneous data points; and calculating and presenting the concentrations of various gas components thereof, the relative ratio of one gas component to the others, or the absolute emission values of each of the gas components thereof. - View Dependent Claims (18, 19)
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Specification