System for measuring current position and/or moving direction of vehicle
First Claim
1. A system for measuring the current position and/or the moving direction of a moving vehicle, comprising:
- transmitting means installed at a reference location, said transmitting means comprisingfirst transmitting means for transmitting an azimuth scanning signal being scanned in succession in different directions,second transmitting means for transmitting a location information signal representing said reference location of said transmitting means, andthird transmitting means for transmitting an azimuth associated information signal containing information concerning a predetermined azimuth,receiving means for receiving said azimuth, scanning signals at three positions spaced apart from each other by predetermined distances and for receiving said location information signal and said azimuth associated information signal at at least one of said three positions, andinformation processing means borne on said moving vehicle, said information processing means being structured to evaluate at least one of the current position and the moving direction of said moving vehicle based on the information concerning the respective time periods from receipt of said azimuth associated information signal until receipt of said azimuth scanning signal at said three positions, said location information and the information concerning said predetermined distances between said three positions.
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Accused Products
Abstract
A reference station is provided at a fixed position. The station is adapted to transmit a scanning signal the transmitting direction of which is scanned in succession in different directions, a positional information signal representative of the position of the reference station and an azimuth information signal representative of a particular azimuth. A vehicle moving with respect to the reference station is provided with receivers at three positions spaced apart from each other by given distances, so that when the vehicle moves in the service area of the reference station the signals transmitted by the reference station are received. The current position of the vehicle and the moving direction of the vehicle are operated based on a time or phase difference from receipt of the particular azimuth signal until receipt of the scanning signal by the three receivers, the position of the reference station and the distances between the three receivers provided in the vehicle.
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Citations
22 Claims
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1. A system for measuring the current position and/or the moving direction of a moving vehicle, comprising:
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transmitting means installed at a reference location, said transmitting means comprising first transmitting means for transmitting an azimuth scanning signal being scanned in succession in different directions, second transmitting means for transmitting a location information signal representing said reference location of said transmitting means, and third transmitting means for transmitting an azimuth associated information signal containing information concerning a predetermined azimuth, receiving means for receiving said azimuth, scanning signals at three positions spaced apart from each other by predetermined distances and for receiving said location information signal and said azimuth associated information signal at at least one of said three positions, and information processing means borne on said moving vehicle, said information processing means being structured to evaluate at least one of the current position and the moving direction of said moving vehicle based on the information concerning the respective time periods from receipt of said azimuth associated information signal until receipt of said azimuth scanning signal at said three positions, said location information and the information concerning said predetermined distances between said three positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification