Device for measuring the movement of a self-guided vehicle
First Claim
1. A device for measuring a movement of a self-guided vehicle, comprising, on-board the vehicle:
- a first accelerometer having two first measurement axes in a longitudinal plane defined by a first longitudinal axis corresponding to a principal movement of the vehicle, assumed to be rectilinear, and of a second axis perpendicular to a floor of the vehicle;
a second accelerometer having at least two second measurement axes in a horizontal plane defined by the first axis and a third axis perpendicular to the first and to the second axis;
a computer connected to receive first output signals associated with each of the two first measurement axes, wherein each first output signal comprises a projection measurement of a total acceleration resultant of the vehicle on the associated measurement axis, and connected to receive second output signals associated with each second measurement axis, wherein each second output signal includes a projection measurement of a total acceleration resultant of the vehicle on the associated measurement axis;
the first and second measurement axes of said first and second accelerometers having in their respective plane an adjustable relative angle, such that, based on the four projection measurements, said computer provides at least one value of longitudinal acceleration of the vehicle at each point of a route including slopes and turns.
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Accused Products
Abstract
A device for measuring the movement of a self-guiding vehicle, that has an enhanced measuring reliability, in particular during an adhesion loss and independently from the travel profile of the vehicle in terms of slope, turn and slant. To this end, the device for measuring the movement of a self-guiding vehicle includes on board thereof two accelerometers coupled to a movement calculator, wherein each accelerometer includes two measurement axes on which are measured projections of a vehicle acceleration resultant. The four measurement axes of the accelerometers are adjusted so that the calculator provides, from the four projection measures, at least one very accurate longitudinal acceleration value of the vehicle at each point of a route including both slopes and turns.
17 Citations
15 Claims
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1. A device for measuring a movement of a self-guided vehicle, comprising, on-board the vehicle:
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a first accelerometer having two first measurement axes in a longitudinal plane defined by a first longitudinal axis corresponding to a principal movement of the vehicle, assumed to be rectilinear, and of a second axis perpendicular to a floor of the vehicle; a second accelerometer having at least two second measurement axes in a horizontal plane defined by the first axis and a third axis perpendicular to the first and to the second axis; a computer connected to receive first output signals associated with each of the two first measurement axes, wherein each first output signal comprises a projection measurement of a total acceleration resultant of the vehicle on the associated measurement axis, and connected to receive second output signals associated with each second measurement axis, wherein each second output signal includes a projection measurement of a total acceleration resultant of the vehicle on the associated measurement axis; the first and second measurement axes of said first and second accelerometers having in their respective plane an adjustable relative angle, such that, based on the four projection measurements, said computer provides at least one value of longitudinal acceleration of the vehicle at each point of a route including slopes and turns. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification