Sensor device and method for detecting the motion of a vehicle
First Claim
1. A sensor device arranged on a motor vehicle for detecting a motion state of the motor vehicle comprising:
- at least two laser clusters arranged on at least two axes with respect to a longitudinal or transverse axis of the vehicle, each cluster having a plurality of light sources for emitting coherent light which is transmitted in a direction of a roadway surface, and a plurality of respective interference detectors, each respective interference detector detecting a measurement variable based on interference between light scattered at the roadway surface and the light emitted by the respective light sources, andan evaluation device which is configured to characterize a motion state of the vehicle by computing;
at least two vehicle rotation variables based on each respective measurement variable, the at least two rotation variables indicate a rotation of the vehicle and are selected from the group consisting of yaw rate of the vehicle, roll rate of the vehicle and pitch rate of the vehicle.
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Accused Products
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.
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Citations
17 Claims
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1. A sensor device arranged on a motor vehicle for detecting a motion state of the motor vehicle comprising:
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at least two laser clusters arranged on at least two axes with respect to a longitudinal or transverse axis of the vehicle, each cluster having a plurality of light sources for emitting coherent light which is transmitted in a direction of a roadway surface, and a plurality of respective interference detectors, each respective interference detector detecting a measurement variable based on interference between light scattered at the roadway surface and the light emitted by the respective light sources, and an evaluation device which is configured to characterize a motion state of the vehicle by computing; at least two vehicle rotation variables based on each respective measurement variable, the at least two rotation variables indicate a rotation of the vehicle and are selected from the group consisting of yaw rate of the vehicle, roll rate of the vehicle and pitch rate of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for detecting a motion state of a motor vehicle having a sensor device arranged on the motor vehicle, said method comprising the steps of:
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transmitting coherent light in a direction of a roadway surface from a plurality of light sources for each of at least two laser clusters arranged on at least two axes with respect to a longitudinal or transverse axis of the vehicle; detecting, by a plurality of respective interference detectors, a measurement variable based on interference between light scattered at the roadway surface and the light emitted by the respective light sources, and characterizing, by an evaluation device, a motion state of the vehicle by computing at least two vehicle rotation variables based on each respective measurement variable, the at least two rotation variables indicate a rotation of the vehicle and are selected from the group consisting of yaw rate of the vehicle, roll rate of the vehicle and pitch rate of the vehicle.
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Specification