IMPROVEMENTS IN OR RELATING TO VEHICLE GUIDANCE SYSTEMS

THIS INVENTION RELATES TO VEHICLES HAVING A MAGNETIC SENSING HEAD ARRANGEMENT FOR CONTROLLING THEMOVEMENT OF THE VEHICLES SUBSTANTIALLY ALONG A DESIRED PATH IN A VEHICLE GUIDANCESYSTE. THE VEICLE IS FITTED WITH A MAGNETIC SENSING HEAD ARRANGEMENT FOR INDICATING DIRECTIONAL DEVIATIONS OF THE SENSING HEAD AND THE VEHICLE FROMA DESIRED DIRECTION IN RELATION TO A PLURALITY OF ENERGISED WIRES. THE MAGNETIC SENSING HEAD ARRANGEET COMPRISES FIRST AND SECOND MAGNETIC DETECTORS DISPOSED ON THE VEHICLE FOR DETECTING THE VERTICAL COMPONENT OF AN ELECTROMAGNETIC FIELD AND HORIZONTALLY SPACED FROM ONE ANOTHE IN THE DIRECTION OF ADVANCEOF THE VEHICLE. THE OUTPUTS OF THE FIRST AND SECOND MAGNETIC DETECTORS ARE CONNECTED IN PHASE- OPPOSITION WHEN THE DIRECTION OF THE VETICAL COMPONET OF THE MAGNETIC FIELD IS THE SAME IN BOTH THE FIRST AND SECOND DETECTORS TO PRODUCEA RESULTANT OUTPUT DEPENDET UPON THE ALGEBRAIC SUM OF THE SIGNALS GENERATED IN THE FIRST AND SECOND MAGNETIC DETECTORS. A PHASE-SENSITIVE DETECTOR IS INCLUDED, TO WHICH THE RESULTANT OUTPUT FROM THE FIRST AND SECOND MAGNETIC DETECTORS IS FED TOGETHE WITH A REFEENCE SIGNAL REPRESENTATIVE OF THE STRENGTH OF THE VETICAL COMPONET OF THE MAGNETIC FIELD IN THE VICINITY OF THEMAGNETIC DETECTORS, WHEREBY THE PHASE SENSITIVE DETECTOR ILL GIVE AN OUTPUT INDICATIVEOF ANGULAR DEVIATIONS OF THE VEHICLE FROM A DESIRED PATH IN RELATION TO THELINES OF CONSTANT MAGNETIC FIED STRENGTH. /TRRL/

  • Corporate Authors:

    Patent Office, England

    25 Southampton Buildings
    London,   England 
  • Authors:
    • Brooked
  • Publication Date: 1972-10-20

Subject/Index Terms

Filing Info

  • Accession Number: 00242778
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Patet
  • Files: ITRD, TRIS
  • Created Date: Jul 31 1974 12:00AM