Motion tracking system and method

Details Motion tracking system and method Motion tracking system and method

1984-05-18

1987-05-05

Rosenberger, R. A.

Optics: measuring and testing

By monitoring of webs or thread

250561, G01N 2186

Patent

active

046627570

ABSTRACT:
The relative transverse position of a measuring device and the aperture patterns in a longitudinally and transversely moving strip of material is held constant. A platform, which supports the measuring device, moves transversely along with the strip. Multi-element energy sensors are supported on the platform at the longitudinal edges of the pattern. Different numbers of elements are illuminated when the strip is off center and a difference signal is provided. The difference signal is used to move the platform to maintain the desired constant transverse relative positioning.

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