DOPPLER SENSOR FOR THE DERIVATION OF TORSIONAL SLIP, FRICTION AND RELATED PARAMETERS
First Claim
Patent Images
1. A method for measuring properties of a travel surface, upon which a travel vehicle travels, comprising:
- providing an incident light from a light source to the travel surface;
collecting light reflected from the travel surface;
determining a surface induced Doppler shift from the incident and collected light; and
determining at least one surface property of the travel surface based on the determined surface induced Doppler shift.
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Abstract
An optical method and apparatus are described for the measurement of properties of a travel vehicle or a travel surface upon which the travel vehicle travels, which includes providing an incident light from a light source to the travel surface, collecting light reflected from the travel surface, determining a surface induced Doppler shift from the incident and collected light and determining at least one of a motion property of the travel vehicle and a surface property of the travel surface based on the determined surface induced Doppler shift.
16 Citations
43 Claims
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1. A method for measuring properties of a travel surface, upon which a travel vehicle travels, comprising:
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providing an incident light from a light source to the travel surface; collecting light reflected from the travel surface; determining a surface induced Doppler shift from the incident and collected light; and determining at least one surface property of the travel surface based on the determined surface induced Doppler shift. - View Dependent Claims (2, 3, 4)
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5-26. -26. (canceled)
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27. A method for determining characteristics of a travel surface while traveling on the travel surface, the method comprising the steps of:
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providing an incident light from a light source to travel surface; collecting light reflected from the travel surface; determining a surface induced Doppler shift from the incident and collected light; and determining surface feature aspect ratio based on the determined surface induced Doppler shift. - View Dependent Claims (28, 29, 30)
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31. An apparatus for determining characteristics of a travel surface while traveling on the travel surface, comprising:
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means for providing an incident light from a light source to travel surface; means for collecting light reflected from the travel surface; means for determining a surface induced Doppler shift from the incident and collected light; and means for determining surface feature aspect ratio based on the determined surface induced Doppler shift. - View Dependent Claims (32, 33, 34)
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35. A method for determining characteristics of a travel surface while traveling on the travel surface, the method comprising the steps of:
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providing a first optical sensor on one side of a vehicle traveling on the travel surface; providing a second optical sensor on an opposite side of the vehicle traveling on the travel surface, where the one side and the opposite side are on opposite sides of the vehicle and perpendicular to a direction of travel; collecting light reflected from the travel surface by the first and second optical sensors; determining induced Doppler shifts from the light collected by the first and second optical sensors; and determining at least one characteristic of the travel surface based on the determined induced Doppler shifts. - View Dependent Claims (36, 37, 38)
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39. A apparatus for determining characteristics of a travel surface while traveling on the travel surface, comprising:
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first means for optically sensing reflected light on one side of a vehicle traveling on the travel surface; second means for optically sensing reflected light on an opposite side of the vehicle traveling on the travel surface, where the one side and the opposite side are on opposite sides of the vehicle and perpendicular to a direction of travel; means for determining induced Doppler shifts from the light collected by the first and second means for optically sensing reflected light; and means for determining at least one characteristic of the travel surface based on the determined induced Doppler shifts. - View Dependent Claims (40, 41, 42)
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43-52. -52. (canceled)
Specification