摘要 |
Apparatus and methods for magnetic through-skin sensing are disclosed. In one embodiment, a sensing system includes a first portion including a magnet having, and a second portion including a magnetic field sensor. The magnet has a magnetic field emanating therefrom. A field-directing member provides a zone of approximately spherically-shaped magnetic force gradient lines, the zone having an angular extent of at least approximately three degrees and the zone extending through the workpiece. The magnetic field sensor is moveable through at least a portion of the zone. The magnetic field sensor senses a characteristic of the shaped magnetic field portion indicative of the desired position for the manufacturing operation. |