Projected Beam Detector With Imaging Device
AssigneeHoneywell International Inc.
InventorsScott Robert Lang, Mark C. Bohanon
Life of this patent
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Abstract
A method of installing a projected beam detector can include providing a radiant energy source, providing a reflector, and projecting a radiant energy beam from the source to the reflector. A multi-pixel sensor or camera can be provided. The beam can be reflected from the reflector back to the sensor. The distance between the reflector and the camera can be determined based on size of image of the reflector incident on the camera. Where incident intensity corresponds to expected intensity for a predetermined distance, the sensitivity can be set based on predetermined distance.
Claims20
A projected beam detector comprising:
- a source of a beam of radiant energy;
- a reflector;
- and
- control circuits including a multi-pixel sensor of radiant energy wherein an image from the sensor provides an indication of distance between the reflector and the sensor.
A method comprising:
- providing a radiant energy source;
- providing a reflector;
- projecting a radiant energy beam from the source to the reflector;
- providing a multi-pixel sensor;
- reflecting the beam from the reflector to the sensor;
- and
- determining a distance parameter between the reflector and the sensor based on size of reflector image.
Dependencies are inferred from the claim text.