METHODS AND APPARATUS FOR DIAGNOSING FAULTS OF A VEHICLE
First Claim
Patent Images
1. A method for analyzing a vehicle, comprising:
- providing a roadway including a localized elevational change comprising at least one of a bump or trough, a sensor located in the roadway and proximate to the elevational change, and a vehicle having a wheel;
driving the vehicle such that the wheel rides over the elevational change;
preparing a first dataset of the response of the sensor to said driving;
operating the vehicle for a period of time after said driving;
redriving the vehicle such that the wheel rides over the elevational change after said operating;
preparing a second dataset of the response of the sensor to said redriving; and
comparing the second dataset to the first dataset.
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Accused Products
Abstract
A rubber cleat is instrumented with two triaxial accelerometers to measure the multi-directional response of the cleat due to the forces within the tire footprint of a ground vehicle. The cleat data is used to detect faults in the front and rear suspension in addition to the wheel tire despite variability in the data. This offboard diagnostic technique is proposed to enable condition-based maintenance.
19 Citations
78 Claims
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1. A method for analyzing a vehicle, comprising:
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providing a roadway including a localized elevational change comprising at least one of a bump or trough, a sensor located in the roadway and proximate to the elevational change, and a vehicle having a wheel; driving the vehicle such that the wheel rides over the elevational change; preparing a first dataset of the response of the sensor to said driving; operating the vehicle for a period of time after said driving; redriving the vehicle such that the wheel rides over the elevational change after said operating; preparing a second dataset of the response of the sensor to said redriving; and comparing the second dataset to the first dataset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for analyzing a wheeled vehicle driven on a roadway, comprising:
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a portable segment of driving surface, said portable segment having a bottom side adapted and configured to be placed on the roadway and a top side adapted and configured for supporting a wheel of the driven vehicle, said portable segment having a cross-sectional shape for changing the elevation of the driven surface; a sensor located within said portable segment, said sensor providing a signal corresponding to movement of said portable segment; and a computer having software and receiving said signal, said software including a predetermined dataset; wherein said software compares the signal to the predetermined dataset. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 68, 69, 70)
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22. An apparatus for a vehicular roadway, comprising:
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a portable segment of driving surface, said segment having a bottom side adapted and configured to be placed on the surface of a roadway, said segment having a top surface adapted and configured to be driven on by a wheeled vehicle, said segment having a cross-sectional shape adapted and configured to locally elevate a vehicle driven over said segment, said segment being sufficiently flexible to generally conform to the surface of the roadway; and at least two movement sensors located within said portable segment, each of said movement sensors providing a signal corresponding to one of displacement along a direction, velocity along a direction, or acceleration along a direction, the direction of each said sensor being aligned to provide a signal that is at least partly orthogonal to the direction of the signal of the other said sensor. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
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32-48. -48. (canceled)
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49. A method for testing a vehicle, comprising:
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providing a portable resilient elevational change including a pair of spaced apart movement sensors and a wheeled vehicle; placing the elevational change on a roadway; driving the vehicle over the change in a first direction; recording first data from each sensor during said driving; redriving the vehicle over the change in a second direction generally opposite to the first direction; recording second data from each sensor during said redriving; and comparing the first data to the second data. - View Dependent Claims (50, 51, 53, 54, 55, 72, 73, 74, 75, 76, 77)
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52. (canceled)
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56-67. -67. (canceled)
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71. (canceled)
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78-82. -82. (canceled)
Specification