Systems and methods for classifying vehicles

• US 20040164749A1
• Filed: 02/20/2003
• Published: 08/26/2004
• Est. Priority Date: 02/20/2003
• Status: Active Grant

• Current Assignee: The Revenue Markets, Inc.
• Original Assignee: The Revenue Markets, Inc.
• Inventors: Melnick, Paul J., Jameison, Gerald, Emerick, John, Dingwall, Robert
• Granted Patent: US 6,894,233 B2
• Time in Patent Office: Days
• US Class Current: 324/662
• CPC Class Codes: G07B 15/00 Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points handling coins or valuable papers, e.g. banknotes, G07D; apparatus for vending or hiring articles or services activated by coins, credit cards, paper currency or the like G07F7/00, G07F17/00

Abstract

A system for use in classifying a vehicle includes a capacitive sensor for operatively receiving a weight of a vehicle and a capacitance detector coupled to said capacitive sensor. The capacitance detector is adapted to determine a capacitance signal of the capacitive sensor in response to the capacitive sensor operatively receiving the weight of the vehicle.

Claims

1. A system for use in classifying a vehicle, said system comprising:

a capacitive sensor for operatively receiving a weight of a vehicle; and

a capacitance detector coupled to said capacitive sensor, said capacitance detector adapted to determine to a capacitance signal of said capacitive sensor in response to said capacitive sensor receiving the weight.

2. The system of claim 1 wherein said capacitance detector is adapted to determine a width of at least one tire of the vehicle passing over said capacitive sensor based on the capacitance signal.

3. The system of claim 2 wherein said capacitance detector is adapted to provide an indication of at least one of the capacitance signal and the width of the at least one tire.

4. The system of claim 1 wherein said capacitance detector is adapted to determine the weight of the vehicle based on the capacitance signal.

5. The system of claim 1 wherein said capacitive sensor comprises a first conductive strip configured to operatively receive the weight and a second conductive strip insulated from said first conductive strip.

6. The system of claim 5 wherein at least a portion of said first conductive strip is deflectable toward said second conductive strip in response to the weight.

7. The system of claim 6 wherein said first conductive strip is elastically returnable in response to the weight being removed from said first conductive strip.

8. The system of claim 5 further comprising an electrical insulator between said first conductive strip and said second conductive strip.

9. The system of claim 8 wherein said insulator is resilient to cause elastic returning of said first conductive strip in response to the weight being removed from the first conductive strip.

10. The system of claim 5 further comprising a third conductive strip located between said first conductive strip and said second conductive strip wherein said third conductive strip is coupled to said capacitance detector.

11. The system of claim 10 wherein said capacitance detector is adapted to determine a second capacitance signal between said first conductive strip and said third conductive strip to determine a width of at least one tire of the vehicle passing over said first conductive strip.

12. The system of claim 10 wherein said capacitance detector is adapted to determine a third capacitance signal between said second conductive strip and said third conductive strip to determine a weight of the vehicle.

13. The system of claim 5 wherein the weight comprises a weight applied by at least one tire and said first conductive strip comprises a material allowing a portion of said first conductive strip receiving the at least one tire to deflect toward said second conductive strip in response to said first conductive strip operatively receiving the weight.

14. The system of claim 5 wherein said first conductive strip comprises a material allowing said first conductive strip to deflect toward said second conductive strip in response to the weight and wherein said first conductive strip avoids operative contact with said second conductive strip while maintaining a space between said first conductive strip and said second conductive strip.

15. The system of claim 5 wherein said first conductive strip comprises a width in a direction substantially orthogonal to a longitudinal dimension of said first conductive strip and said second conductive strip comprises a second width in a direction substantially orthogonal to a second longitudinal dimension of said second conductive strip, and wherein said second width comprises a dimension less than said first width.

16. The system of claim 5 wherein said the first conductive strip comprises a first split conductive strip having a first part and a second part and wherein said capacitance signal comprises a first capacitance signal for said first part and said second conductive strip and further comprising a second capacitance detector adapted to determine a second capacitance signal for said second part and said second conductive strip.

17. The system of claim 16 wherein said capacitance detector is adapted to determine a width of a first tire of the vehicle based on said first capacitance signal and adapted to determine a second width of a second tire of the vehicle based on said second capacitance signal.

18. The system of claim 16 wherein said capacitance detector is adapted to determine a weight applied by a first tire of the vehicle based on said first capacitance signal and said capacitance detector is adapted to determine a second weight applied by a second tire based on said second capacitance signal.

19. The system of claim 5 wherein said first conductive strip comprises a material more flexible than a material forming said second conductive strip.

20. The system of claim 5 further comprising a jacket having a cavity, said second conductive strip being located in said cavity and wherein said jacket comprises said first conductive strip.

21. The system of claim 1 wherein said capacitance detector comprises a computing unit.

22. The system of claim 21 wherein said computing unit is adapted to determine at least one of a tire width of the vehicle and the weight based on the capacitance signal.

23. The system of claim 22 further comprising a second computing unit adapted to receive an indication from said first computing unit of the at least one of a tire width of the vehicle and the weight and said second computing unit being adapted to compare the indication to at least one classifying criteria to determine a classification of the vehicle.

24. The system of claim 23 wherein said second computing unit is adapted to determine an appropriate fare for the vehicle based on the classification.

25. The system of claim 1 wherein said capacitive sensor is configured to be located in a cavity of a treadle.

26. A method for use in classifying a vehicle, the method comprising:

receiving the vehicle on a surface of a capacitive sensor; and

determining a capacitance signal in response to the vehicle being received on the surface of the capacitive sensor.

27. The method of claim 26 wherein the capacitive sensor comprises a first conductive strip and a second conductive strip.

28. The method of claim 26 further comprising locating the capacitive sensor in a cavity of a treadle.

29. The method of claim 26 further comprising determining at least one of a tire width and a weight of the vehicle based on the capacitance signal.

30. The method of claim 26 wherein the determining is performed by a first computing unit.

31. The method of claim 26 further comprising comparing the capacitance signal to a second capacitance signal determined at least one of before the vehicle passes over the capacitive sensor and after the vehicle passes over the capacitive sensor to determine at least one of a tire width and a weight of the vehicle.

32. The method of claim 29 further comprising electronically providing an indication of the at least one of a tire width and a weight of the vehicle to a computing unit.

33. The method of claim 32 further comprising electronically comparing the at least one of a tire width and a weight by the computing unit to a predetermined criteria to classify the vehicle.

34. The method of claim 33 further comprising causing an electronic payment to be made based on the classification.

35. The method of claim 26 further comprising receiving the vehicle on a second surface on a second capacitive sensor and determining a second capacitance signal in

response to the vehicle being received on the second surface of the second capacitive sensor.

36. The method of claim 35 further comprising electronically determining at least one of a vehicle direction and a vehicle speed based on the first capacitance signal and the second capacitance signal.

37. The method of claim 26 further comprising electronically determining a presence of the vehicle on the surface of the capacitive sensor based on the capacitance signal.

38. The method of claim 37 further comprising electronically providing an indication of the presence of the vehicle on the surface of the capacitive sensor based on the capacitance signal.

39. A system for a use in classifying a vehicle, said system comprising:

a treadle having a first cavity and a second cavity;

a first conductive strip insulated from a second conductive strip, said first conductive strip and said second conductive strip being located in said first cavity and being coupled to a capacitance detector;

a third conductive strip and a fourth conductive strip located in said second cavity.

40. The system of claim 39 wherein said capacitance detector is adapted to determine at least one of a weight of the vehicle and a tire width of the vehicle, in response to the vehicle passing over said first conductive strip.

41. The system of claim 39 wherein said third conductive strip and said fourth conductive strip are coupled to an electrical contact detector for determining a contact between said third conductive strip and said fourth conductive strip.

42. The system of claim 41 wherein said electrical contact detector is adapted to count a number of vehicles passing over said third conductive strip.

43. The system of claim 39 wherein said third conductive strip and said fourth conducting strip are coupled to a second capacitance detector, said second capacitance detector being adapted to determine a second capacitance signal between the third conductive strip and the fourth conductive strip.

44. The system of claim 43 wherein said second capacitance detector is adapted to determine at least one of a tire width of the vehicle and a weight of the vehicle.

45. The system of claim 39 wherein said third conductive strip and said fourth conductive strip are coupled to a second capacitance detector, said second capacitance detector being adapted to determine at least one of a tire width of the vehicle, a weight of the vehicle, and a presence of the vehicle, wherein said capacitance detector is adapted to determine at least one of a weight of the vehicle, a tire width of the vehicle, and a presence of the vehicle, and further comprising a computing unit for receiving information from the capacitance detector and the second capacitance detector regarding at least one of the tire width, the weight, and the presence of the vehicle.

46. The system of claim 45 wherein said computing unit is adapted to determine at least one of a speed of the vehicle and a direction of the vehicle based on the information.

47. The system of claim 45 wherein said computing unit is adapted to classify the vehicle based on the information.

48. The system of claim 45 further comprising at least one of a vehicle profile detector, a vehicle sensing loop, a vehicle separation detector and a light curtain coupled to said computing unit, wherein said computing unit is adapted to receive secondary classification information from the at least one of a vehicle profile detector, a vehicle sensing loop, a vehicle separation detector and a light curtain regarding a characteristic of the vehicle and wherein said computing unit is adapted to classify the vehicle based on at least one of the information and the secondary classification information.