U.S. patents available from 1976 to present.
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Vehicle guidance system

Patent 5815825 Issued on September 29, 1998. Estimated Expiration Date: Icon_subject February 26, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Guidance control system for a traction vehicle
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Issued on: 08/05/1980
Inventor: Diaz

Automated road transportation system
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Issued on: 11/30/1982
Inventor: Minovitch

Road vehicle control system
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LIMIS systems, devices and methods
Patent #: 4656463
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Inventor: Anders ,   et al.

Running control method and apparatus of the automatic guided vehicles
Patent #: 4908557
Issued on: 03/13/1990
Inventor: Sudare, et al.

Intelligent vehicle-highway system
Patent #: 4962457
Issued on: 10/09/1990
Inventor: Chen, et al.

System for sensing arrival of an automatic guided vehicle at a wire
Patent #: 5127486
Issued on: 07/07/1992
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System and method of navigating the travel of an autonomous vehicle
Patent #: 5189612
Issued on: 02/23/1993
Inventor: Lemercier, et al.

Autonomous vehicle automatically running on route and its method
Patent #: 5229941
Issued on: 07/20/1993
Inventor: Hattori

Inter-vehicle distance measuring system
Patent #: 5249027
Issued on: 09/28/1993
Inventor: Mathur, et al.

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Inventors

Assignee

Application

No. 607027 filed on 02/26/1996

US Classes:

701/23, Automatic route guidance vehicle180/169, Radiation, force, or waves reflected from external object or surface318/587Land vehicles

Examiners

Primary: Chin, Gary

Attorney, Agent or Firm

Foreign Patent References

  • 1-253007 JP. 10/13/1989
  • 2-143608 JP. 12/13/1990
  • 5-019854 JP. 01/13/1993
  • 5-126591 JP. 05/13/1993

International Class

G06F 165/00

Foreign Application Priority Data

1995-03-14 JP

Abstract

A vehicle running guidance system using magnetic markers for the purpose of reducing the number of magnetic markers to be laid on a road surface. The magnetic nails are laid as magnetic markers on a road. The radio wave generator tags are also laid. The radio wave generator tags transmit road curve data for a distance of about 100 m in the running direction. Power for the radio wave generator tags is supplied from a magnetic generator on a vehicle. On the vehicle, the relative displacement from a magnetic nail is detected by a magnetic sensor, and at the same time the road curve data from radio wave generator tags is received by a radio wave receiving device. The controller determines the amount of steering, based on relative displacement with respect to magnetic nails and road curve data, and supplies it to the actuator. Transmission of road curve data contributes to reducing the number of magnetic nails.

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