Two-Arm Automatic Calibration Technique for Probe
Original Publication Date: 1985-Jan-01
Included in the Prior Art Database: 2005-Feb-18
This invention uses two photo-electric sensors to reference a probe to an X-Y-Z coordinate. The probe would first scan through sensor 10 field of view in the Y direction. When the sensor beam is broken, a computer will read the probe's position. The probe will continue through, and then repeat the operation from the other direction. The two readings are then averaged, with the result being the center of the field of view. This would be repeated until the difference between the averages is less than a predetermined threshold that is based on the precision required. The probe now scans through sensor 12 in the X direction and repeats the operation, as previously described. This establishes an X-Y coordinate in a plane.