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 for receiving the set of predetermined wavelength bands passing through the emission plume;
a processing unit interconnects with the radiation detection unit for analyzing and processing the data collected by the radiation detection unit;
characterized in thatthe adaptable radiation detection unit comprises one or more detachable and expandable detecting elements for receiving the set of predetermined wavelength bands and producing a plurality of corresponding response concurrently at any one time instant as required; and
the processing unit comprises 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.
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Abstract
A remote vehicle emissions measurement system comprising a radiation source, an adaptable radiation detection unit and a processing unit, characterized in that the radiation source comprises an infrared source, an ultraviolet source or a combination thereof; the radiation detection unit comprises one or more detachable and expandable detecting elements for receiving the set of predetermined wavelength bands and producing a plurality of corresponding response concurrently at any one time instant; and the processing unit comprises 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.
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Citations
22 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 for receiving the set of predetermined wavelength bands passing through the emission plume; a processing unit interconnects with the radiation detection unit for analyzing and processing the data collected by the radiation detection unit;
characterized in thatthe adaptable radiation detection unit comprises one or more detachable and expandable detecting elements for receiving the set of predetermined wavelength bands and producing a plurality of corresponding response concurrently at any one time instant as required; and the processing unit comprises 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. 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 (21, 22)
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Specification