ALIGNMENT SYSTEM
First Claim
Patent Images
1. An alignment system comprising a test field generator generating a magnetic test field that is small in comparison to ambient magnetic fields and a sensor arrangement adapted to detect the magnetic test field with ambient field compensation.
1 Assignment
0 Petitions
Accused Products
Abstract
A magnetic hole finder arrangement having a test field detector including a GMR sensor and may having a test field detector including a first and second magnetic field detectors (which may be GMRs) arranged with respect to a hole location position, the detectors having magnetic axes each arranged transversely to a radius from the hole location position to the detector. The arrangement may include geomagnetic or ambient magnetic field compensation.
23 Citations
33 Claims
- 1. An alignment system comprising a test field generator generating a magnetic test field that is small in comparison to ambient magnetic fields and a sensor arrangement adapted to detect the magnetic test field with ambient field compensation.
- 3. A magnetic hole finder arrangement comprising a test field detector comprising first and second magnetic field detectors arranged with respect to a hole location position, the detectors having magnetic axes each arranged transversely to a radius from the hole location position to the detector.
- 20. A method for locating a hole in a support behind a skin comprising generating a test magnetic field of which field lines pass along the hole and through the skin, and detecting the field that passes through the skin using a field detector comprising GMR detectors.
Specification