Sensing location of an object with line image projection and rot

Details Sensing location of an object with line image projection and rot Sensing location of an object with line image projection and rot

1987-04-02

1988-12-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356376, G01N 2186

Patent

active

047926988

ABSTRACT:
An apparatus and method for sensing the presence or location of an object in a plane perpendicular to a reference axis is disclosed. An optical detector using triangulation techniques is used to sense the presence or rough location of the object. A contact detector is then used to determine the precise location of the object. The presence or location of the object can also be detected in a plane including the reference axis. The probe device containing the two detectors is preferably moved quickly while the rough location is determined and more slowly to determine the precise location. The contact detector can be an optical contact probe moved by an auxiliary moving device attached to a main moving device. Various optical contact detectors are also disclosed.

REFERENCES:
patent: 4105925 (1978-08-01), Rossol et al.
patent: 4373804 (1983-02-01), Pryor et al.
patent: 4492472 (1985-01-01), Asano et al.
patent: 4494874 (1985-01-01), Di Matteo et al.
patent: 4574199 (1986-03-01), Pryor

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