Position detector for moving vehicle
First Claim
1. A steering system for a moving vehicle wherein light signals are received from light beam source means provided at four reference points apart from the moving vehicle and a current position of the moving vehicle is detected based on the received light signals and positional information of the reference points, comprising;
- beam receiver means for receiving the light signals, said beam receiver means being mounted on the moving vehicle and rotatable in a horizontal plane;
means for detecting azimuths of the reference points with respect to the advance direction of the moving vehicle on the basis of the light signals received by the beam receiver means;
means for calculating two differential azimuths corresponding to two pairs of reference points, each of said pairs being disposed on diagonal positions viewed from the moving vehicle;
calculating means for calculating the position of the moving vehicle on the basis of the detected azimuths, the calculated differential azimuths, and the positional information of the reference points;
means for setting a desired course of travel of said moving vehicle;
steering means for steering said moving vehicle; and
means responsive to a comparison between said desired course of travel and said calculated position of the moving vehicle for controlling said steering means.
1 Assignment
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Accused Products
Abstract
A steering system for a moving vehicle wherein light signals are received from light beam source means provided at four reference points apart from the moving vehicle includes a position detector for determining a current position of the moving vehicle based on the received light signals and information on the reference points, the position detector comprising a beam receiver means for receiving the light signals which is mounted on the moving vehicle and rotatable in the horizontal plane, a means for detecting azimuths of the reference points with respect to the advance direction of the moving vehicle on the basis of the received light signals, a means for calculating two differential azimuths between two pairs of reference points disposed at diagonal positions viewed from the moving vehicle, and a calculating means for calculating the position of the moving vehicle on the basis of the azimuths, the differential azimuthes, and the positional information of the reference points.
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Citations
5 Claims
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1. A steering system for a moving vehicle wherein light signals are received from light beam source means provided at four reference points apart from the moving vehicle and a current position of the moving vehicle is detected based on the received light signals and positional information of the reference points, comprising;
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beam receiver means for receiving the light signals, said beam receiver means being mounted on the moving vehicle and rotatable in a horizontal plane; means for detecting azimuths of the reference points with respect to the advance direction of the moving vehicle on the basis of the light signals received by the beam receiver means; means for calculating two differential azimuths corresponding to two pairs of reference points, each of said pairs being disposed on diagonal positions viewed from the moving vehicle; calculating means for calculating the position of the moving vehicle on the basis of the detected azimuths, the calculated differential azimuths, and the positional information of the reference points; means for setting a desired course of travel of said moving vehicle; steering means for steering said moving vehicle; and means responsive to a comparison between said desired course of travel and said calculated position of the moving vehicle for controlling said steering means. - View Dependent Claims (2, 3, 4, 5)
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Specification