SENSOR DEVICE AND METHOD FOR DETECTING THE MOTION OF A VEHICLE
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Abstract
A sensor device for detecting a motion state of a motor vehicle. The sensor device includes at least one laser unit having a light source for emitting coherent light which is transmitted in the direction of a roadway surface, and an interference detector which is designed to detect at least one measurement variable which characterizes interference between the light scattered at the surface and the light of the light source. The measurement variable represents a speed component of the sensor device and/or a distance between the sensor device and the roadway surface. The laser unit is coupled to an evaluation device which is designed to determine, from the measurement variable, at least one variable which characterizes the motion state of the vehicle, in particular a speed component of the center of gravity of the vehicle, a rotational angle or a rotation rate of the vehicle.
19 Citations
32 Claims
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1-15. -15. (canceled)
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16. A sensor device for detecting a motion state of a motor vehicle comprising:
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at least one laser unit which has a light source for emitting coherent light which is transmitted in a direction of a roadway surface when the sensor device is arranged on the motor vehicle, an interference detector which is configured to detect at least one measurement variable which characterizes interference between light scattered at the roadway surface and light of the light source, wherein the measurement variable represents a speed component of the sensor device and/or a distance between the sensor device and the roadway surface, wherein the at least one laser unit is coupled to an evaluation device which is configured to determine, from the measurement variable, at least one variable which characterizes the motion state of the vehicle. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method for detecting a motion state of a motor vehicle having a sensor device, said method comprising the steps of:
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transmitting coherent light in a direction of a roadway surface from a light source of the sensor device; detecting at least one measurement variable, which characterizes interference between light scattered at the roadway surface and light of the light source, with an interference detector of the sensor device, wherein the measurement variable represents a speed component of the sensor device and/or a distance between the sensor device and the roadway surface, and obtaining at least one variable which characterizes a motion state of the vehicle in accordance with the measurement variable.
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Specification