System and method for quantifying the presence of components in the exhaust of commercial and/or heavy-duty vehicles

• US 8,429,957 B2
• Filed: 01/31/2012
• Issued: 04/30/2013
• Est. Priority Date: 05/02/2008
• Status: Expired due to Fees

• Current Assignee: Envirotest Corp. (Opus Group AB)
• Original Assignee: Envirotest Corp. (Opus Group AB)
• Inventors: Stedman, Donald H.
• Primary Examiner(s): Kirkland, III, Freddie
• Application Number:
  US13/362,633
• Publication Number:
  US 20120130584A1
• Time in Patent Office: 455 Days
• Field of Search: 73/233.1, 73/233.3, 731/147.1
• US Class Current: 73/114.71
• CPC Class Codes: G01M 15/102 by monitoring exhaust gases
• CPC Class Codes: G01M 15/108 using optical methods
• CPC Class Codes: G01N 1/2252 in a vehicle exhaust
• CPC Class Codes: G01N 1/26 with provision for intake from several spaces
• CPC Class Codes: G01N 15/06 Investigating concentration of particle suspensions by weighing G01N5/00; investigating sedimentation of particle suspensions G01N15/04; investigating individual particles G01N15/10
• CPC Class Codes: G01N 15/065 using condensation nuclei counters
• CPC Class Codes: G01N 15/0656 using electric, e.g. electrostatic methods or magnetic methods by investigating individual particles G01N15/1031, G01N15/12
• CPC Class Codes: G01N 15/075 by optical means
• CPC Class Codes: G01N 21/3504 for analysing gases, e.g. multi-gas analysis

Abstract

A system and/or method for quantifying the presence of one or more components in vehicle exhaust, and more particularly to a non-contact, sampling system and method for quantifying the presence of one or more components in exhaust emissions of commercial and/or heavy-duty vehicles that emit exhaust at an elevated level, under actual operating conditions.

Claims

1. A system, positioned at a site along a roadway, for determining the concentration of one or more constituents present in a sample of exhaust emissions emitted by a vehicle traveling on the roadway, the system comprising:

a component detection system configured to determine the concentration of one or more constituents present in a sample of vehicle exhaust emissions;

a first collector positioned above the surface of the roadway, the first collector having one or more openings configured to receive exhaust emissions emitted by vehicles in an upward direction or at an elevated position;

a second collector positioned on or near the surface of the roadway, the second collector having one or more openings configured to receive exhaust emissions emitted by vehicles in a downward direction or at or near ground-level;

a distributor operatively coupled to the first collector, the second collector, and to the component detection system, wherein the distributor is configured to couple the first collector to the component detection system when a passing vehicle emits exhaust emissions in an upward direction or at an elevated position, or couple the second collector to the component detection system when a passing vehicle emits exhaust emissions in a downward direction or at or near ground-level; and

wherein the component detection system is configured to receive a sample of the exhaust emissions of the passing vehicle directed by the distributor, and to determine the concentration of one or more constituents present in the received sample of exhaust emissions.

2. The system of claim 1, wherein the roadway comprises a test lane.

3. The system of claim 1, wherein the component detection system is located remotely from the roadway.

4. The system of claim 1, wherein the component detection system comprises a trace gas detection system.

5. The system of claim 1, wherein the component detection system comprises a fine particle measurement system.

6. The system of claim 1, wherein the first collector comprises a perforated pipe.

7. The system of claim 1, wherein the collector runs parallel to a direction of travel of the roadway.

8. The system of claim 1, further comprising:

a gathering structure having one or more surfaces positioned to direct exhaust emissions emitted by vehicles in an upward direction or at an elevated position toward the one or more openings of the first collector prior to measurement by the component detection system.

9. The system of claim 8, wherein the gathering structure comprises a roof that is supported above the surface of the roadway by one or more supports such that vehicles can pass under the roof while traveling along the roadway.

10. The system of claim 9, wherein the roadway comprises a single vehicle travel lane, and wherein the roof of the gathering structure covers the single vehicle travel lane.

11. The system of claim 9, wherein the roadway comprises multiple vehicle travel lanes, and wherein the roof of the gathering structure covers one of the multiple vehicle travel lanes.

12. The system of claim 9, wherein the roadway comprises multiple vehicle travel lanes, and wherein the roof of the gathering structure covers the roadway.

13. The system of claim 9, wherein the collector is fastened to an underside of the roof of the gathering structure such that the one or more openings of the first collector face the surface of the roadway.

14. The system of claim 9, wherein the first collector is integrally formed with the roof of the gathering structure such that the one or more openings of the first collector comprise one or more openings in an underside of the roof of the gathering structure.

15. The system of claim 9, wherein the one or more supports of the gathering structure comprise at least one wall on a first side of the roadway and at least one wall on a second side of the roadway that is opposite the first side of the roadway.

16. The system of claim 9, wherein the roof comprises an A-frame roof defined by two planes oriented at an angle to one another, and wherein the collector is disposed on an underside of the roof at or near the intersection of the two planes.

17. The system of claim 9, wherein the roof is impermeable to the exhaust emissions.

18. The system of claim 9, wherein the roof is water-proof.

19. The system of claim 1, wherein the second collector comprises a perforated pipe.

20. The system of claim 1, wherein the second collector runs parallel to a direction of travel of the roadway.

21. The system of claim 1, wherein the second collector is placed in a trough formed in the roadway.

22. The system of claim 1, wherein the second collector is laid on the surface of the roadway.

23. The system of claim 1, wherein the second collector is secured to the surface of the roadway.

24. The system of claim 1, wherein the second collector is received in a guide that is laid on the surface of the roadway.

25. The system of claim 1, wherein the guide is secured to the surface of the roadway.

26. The system of claim 1, wherein the distributor comprises one or more valves.

27. The system of claim 1, wherein the distributor comprises a manifold.

28. The system of claim 1, further comprising:

at least one flow generator, in communication with the first collector and the second collector, that is configured to generate a flow of air that draws exhaust emissions through the first collector and second collector to the distributor.

29. The system of claim 1, further comprising:

a sensor positioned at or near the first collector; and

wherein the distributor is configured to couple the first collector to the component detection system when the sensor generates an output signal indicative of an increase in a level of a gas beyond a predetermined level.

30. The system of claim 29, wherein the sensor comprises a part of the first collector.

31. The system of claim 29, wherein the gas is carbon dioxide (CO₂).

32. The system of claim 29, further comprising:

a computer in wired or wireless communication with the sensor and the distributor, wherein the computer transmits one or more instruction signals to the distributor based on one or more output signals received from the sensor.

33. The system of claim 1, further comprising:

a sensor positioned at or near the second collector; and

wherein the distributor is configured to couple the second collector to the component detection system when the sensor generates an output signal indicative of an increase in a level of a gas beyond a predetermined level.

34. The system of claim 33, wherein the sensor comprises a part of the second collector.

35. The system of claim 33, wherein the gas is carbon dioxide (CO₂).

36. The system of claim 33, further comprising:

a computer in wired or wireless communication with the sensor and the distributor, wherein the computer transmits one or more instruction signals to the distributor based on one or more output signals received from the sensor.

37. The system of claim 1, further comprising:

a first sensor positioned at or near the first collector; and

a second sensor positioned at or near the second collector;

wherein the distributor is configured to couple the first collector to the component detection system when the first sensor generates an output signal indicative of an increase in a level of a gas beyond a predetermined level, or couple the second collector to the component detection system when the second sensor generates an output signal indicative of an increase in a level of a gas beyond a predetermined level.

38. The system of claim 37, wherein the first sensor comprises a part of the first collector.

39. The system of claim 37, wherein the second sensor comprises a part of the second collector.

40. The system of claim 37, wherein the gas is carbon dioxide (CO₂).

41. The system of claim 37, further comprising:

a computer in wired or wireless communication with the first sensor, the second sensor, and the distributor, wherein the computer transmits one or more instruction signals to the distributor based on one or more output signals received from the first sensor and the second sensor.

42. The system of claim 1, further comprising:

a vehicle communication system including at least one display, wherein the at least one display communicates information to drivers of vehicles.

43. The system of claim 1, further comprising:

a vehicle identification system configured to capture images of vehicle license plates.

44. The system of claim 1, further comprising:

a position tracking system for tracking one or more of the position, speed, or acceleration of vehicles.

45. The system of claim 1, further comprising:

a computer, operatively connected to the component detection system and to a network, wherein the computer is configured to;

receive, from the component detection system, information concerning the concentration of one or more constituents present in the sample of exhaust emissions; and

transmit the received information to a network location via the network.