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This article describes the design of a miniaturized pressurized air nozzle and pressure sensor assembly that is used as a proximity location-detector for a robot arm.
English (United States)
This text was extracted from a PDF file.
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Robot Registration Device
This article describes the design of a miniaturized pressurized air nozzle and
pressure sensor assembly that is used as a proximity location-detector for a
The sensor assembly is designed to detect the change in air pressure in the
sensor tube when an object is present and within a prescribed distance to the
sensor level. When no object is present, the air pressure in the tube is negative
and turns positive when an object is close to the orifice as shown in the Figure.
The detector can be used in two modes: (l) negative pressure indication
permits the robot arm to maintain a search for the object until a positive pressure
is developed; (2) a positive pressure indication permits the robot arm to maintain
a search mode until a negative pressure is sensed.
This permits the robot arm to approach an object surface perpendicular to the
surface and also to scan along the surface of an object horizontally to detect an
edge or a detent or a hole.
Since air is used as the active element, the sensor is unaffected by a wide
image of heat or cold temperatures, light or darkness, electromagnetic fields, etc.
that restrict other active elements in proximity sensors.