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Title: US3947741: Boat guidance system
[ Derwent Title ]


Country: US United States of America

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11 pages

 
Inventor: Ball, Kenneth H.; Tarzana, CA
Cole, Jr., Arthur L.; Saugus, CA

Assignee: Walt Disney Productions, Burbank, CA
other patents from WALT DISNEY PRODUCTIONS (617670) (approx. 22)
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Published / Filed: 1976-03-30 / 1974-01-15

Application Number: US1974000433505

IPC Code: Advanced: G01S 1/02; G01S 19/19; G05D 1/02;
IPC-7: B63H 25/02; B64C 13/18; G05D 1/00;

ECLA Code: G05D1/02C; G01S1/02; L63H11/00M;

U.S. Class: Current: 318/588; 318/016; 318/576; 318/587;
Original: 318/588; 318/016; 318/576; 318/587;

Field of Search: 318/016,587,576,588,608 180/098 235/150.26,150.27

Priority Number:
1974-01-15  US1974000433505

Abstract:     A guidance system for controlling the path of a boat comprising a first conductor disposed below the surface of water in a first elongated loop and connecting at the terminals thereof across an A.C. source of electrical signal and a second conductor driven in a quadrature with the first conductor and disposed in a second loop partly superposed over the first loop. A first and second orthogonal inductive coil, mounted in the boat along a plane parallel to the loop and a plane normal to the loop plane and substantially parallel to the centerline thereof sense the vertical and horizontal components of the electromagnetic field generated about the conductor loops to produce corresponding induced signals respectively varying in amplitude and phase according to the amplitude of the electromagnetic field and the position thereof. Such induced signal of the first and second coils are then clipped by signal limiters and connected to a common phase detector to produce a phase angle signal indicative of the amplitude of deviation of the coils relative the loops. The phase detector output signal is then connected to control a steering apparatus.

Attorney, Agent or Firm: Fulwider, Patton, Rieber, Lee & Utecht ;

Primary / Asst. Examiners: Schaefer, Robert K.; Feldhaus, John J.

Family: None

First Claim:
Show all 10 claims
We claim:     1. A guidance system for controlling the lateral motion of a mobile object along a directed path, comprising:
  • a source of A.C. electrical power;
  • first signal producing means operatively connected across said source of A.C. power, including a first conductor arranged in circuit to form a first elongated loop in a plane parallel with the surface of the path, for producing a first electromagnetic field signal thereabout according to the excitation thereof by said source of A.C. power;
  • phase lag means operatively connected at one end thereof across the said source of A.C. power for producing an A.C. excitation signal at the other end thereof at a predetermined phase relationship with said source of A.C. power;
  • second signal producing means operatively connected across said phase lag means, including a second conductor arranged in circuit to form a second elongated loop disposed in substantial parallel arrangement and partly overlapping said first elongated loop, for producing a second electromagnetic field thereabout according to the excitation of said phase lag means;
  • first inductive sensor means mounted in said mobile object for producing a first sensor signal indicative of the sum of vector components of said first and second electromagnetic field signals aligned substantially vertical relative the plane of said first and second elongated loops;
  • second inductive sensor means mounted in said object for producing a second sensor signal indicative of the sum of the vector components of said first and second electromagnetic field signals aligned substantially parallel to the planes of said loops and substantially transverse to the longitudinal axes thereof;
  • a first and second clipping means connected to respectively receive said first and second sensor signals for producing corresponding first and second square wave signals of fixed amplitudes respectively indicative of the zero crossings of said first and second sensor signals;
  • phase detector means adapted to receive said first and second square wave signals for producing a control signal indicative of the phase difference therebetween; and
  • control means rendered responsive to said control signal for producing control forces directing the motion of said mobile object in response thereto.


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Forward References: Show 5 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (5)   |   Backward references (7)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 4pp US3033305  1962-05 Harned et al.   Vehicle guidance system
Get PDF - 9pp US3132710* 1964-05 Petrella et al.    
Get PDF - 4pp US3556244  1971-01 Gray  RCA Corporation VEHICLE ROAD GUIDANCE SYSTEM
Get PDF - 15pp US3612206  1971-10 Ohntrup  Eaton Yale & Towne Inc. AUTOMATIC GUIDANCE SYSTEM FOR WAREHOUSE TRUCKS AND THE LIKE
Get PDF - 7pp US3614990  1971-10 Schnitzler   ELECTRICAL CONTROL ARRANGEMENT FOR STEERING OF VEHICLES
Get PDF - 10pp US3757887  1973-09 Moore et al.  Versadyne Inc. VEHICLE GUIDANCE SYSTEM
Get PDF - 17pp US3768586  1973-10 Thompson et al.  Eaton Corporation VEHICLE GUIDANCE SYSTEM
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Foreign References: None

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