×

Method for locating an inaccessible object having a magnetic field generating solenoid

  • US 5,917,325 A
  • Filed: 08/25/1997
  • Issued: 06/29/1999
  • Est. Priority Date: 03/21/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of locating an inaccessible object, which object has a solenoid (10) for generating a magnetic field, the method comprising:

  • a) storing information relating to the relationship between the ratio of the axial and radial components of the magnetic field at a plurality of points in the plane containing the axis of the solenoid (10) and the angle between the axis of the solenoid (10) and the line joining each of the plurality of points to the center of the solenoid (10);

    b) determining the ratio of the axial and radial components of the magnetic field at a measurement location; and

    c) determining the one of the plurality of points which corresponds to the measurement location, on the basis of said information and said ratio of the axial and radial components thereby to determine the location of the object relative to the measurement location.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×