Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1975-06-23
1976-08-10
Spar, Robert J.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
214 164B, 250223R, 214 164A, B65E 106
Patent
active
039736857
ABSTRACT:
A photoelectric sensing apparatus for a pallet carrying robot vehicle is disclosed. The sensing apparatus includes a plurality of photoelectric sensors mounted on the robot vehicle for sensing the location of stored pallets mounted on storage rails in order to signal the control logic to stop the robot vehicle at a desired position. If the robot vehicle is unloaded, one sensor functions to sense the location of a stored pallet after the robot vehicle has moved directly under the stored pallet. If the robot vehicle is loaded, another sensor functions to sense the location of a stored pallet immediately before the robot vehicle reaches the same. Each sensor comprises a light transmitter for projecting a light beam along a first axis, and a receiver sensitive along a second axis to receive a reflected light signal and generate an electrical signal in response thereto. The transmitter and receiver are angularly oriented with respect to each other to enable the first and second axes to intersect at a junction located at a predetermined height above the robot vehicle. This height is at the same plane as the stored pallets in order for the sensor to be responsive only to the pallet and not to any extraneous objects located in any other plane.
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Johnson R. B.
Litton Systems Inc.
Spar Robert J.
Thiel Walter R.
Vargo Robert M.
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