Method of and system for detecting object weighing interferences
First Claim
1. A system, comprising:
- a housing having a horizontal scanning window;
a laser scanning subsystem for projecting a laser scanning pattern through the horizontal scanning window and producing scan data for objects;
a scan data processor for processing the scan data produced by the laser scanning subsystem in an effort to read symbols on objects;
a weigh scale subsystem comprising a weigh platter above the horizontal scanning window, the weigh scale subsystem for weighing objects placed on the weigh platter and producing weigh data representative of the weight of objects weighed on the weigh platter; and
a weighing interference detection subsystem for projecting pairs of overlapping planar IR-based object detection planes normal to the weigh platter about the outer edges of the weigh platter to detect weighing interference conditions and generating control signals indicative of detected weighing interference conditions.
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Abstract
A POS-based checkout/scale system having (i) a bar code symbol reading subsystem for reading bar code symbols on products being purchased at a retail POS station, and (ii) a produce weigh scale having a weigh scale assembly for weighing one or more produce items on a weigh platter during produce weighing operations carried out at the time of checkout at said retail POS station. The system also includes an automatic produce weighing interference detection subsystem, supporting an IR-based light curtain about the weigh platter, automatically detects when any object is overhanging the weigh platter during produce weighing operations, and generates an alert signal when such conditions are automatically detected.
519 Citations
20 Claims
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1. A system, comprising:
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a housing having a horizontal scanning window; a laser scanning subsystem for projecting a laser scanning pattern through the horizontal scanning window and producing scan data for objects; a scan data processor for processing the scan data produced by the laser scanning subsystem in an effort to read symbols on objects; a weigh scale subsystem comprising a weigh platter above the horizontal scanning window, the weigh scale subsystem for weighing objects placed on the weigh platter and producing weigh data representative of the weight of objects weighed on the weigh platter; and a weighing interference detection subsystem for projecting pairs of overlapping planar IR-based object detection planes normal to the weigh platter about the outer edges of the weigh platter to detect weighing interference conditions and generating control signals indicative of detected weighing interference conditions. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system, comprising:
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a housing having a horizontal scanning window; an imaging-based symbol reading subsystem for capturing images of objects on or above the horizontal scanning window and processing the captured images in an effort to read symbols on objects; a weigh scale subsystem comprising a weigh platter above the horizontal scanning window, the weigh scale subsystem for weighing objects placed on the weigh platter and producing weigh data representative of the weight of objects weighed on the weigh platter; and a weighing interference detection subsystem for projecting pairs of overlapping planar IR-based object detection planes normal to the weigh platter about the outer edges of the weigh platter to detect weighing interference conditions and generating control signals indicative of detected weighing interference conditions. - View Dependent Claims (8, 9, 10, 11)
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12. A method of weighing objects on a weigh platter having outer edges, comprising:
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projecting pairs of overlapping planar IR-based object detection planes normal to the weigh platter about the outer edges of the weigh platter; detecting, with the projected pairs of overlapping planar IR-based object detection planes, if one or more objects are extending over an outer edge of the weigh platter; weighing an object on the weigh platter; and if an object extending over an outer edge of the weigh platter is not detected, transmitting the weight of the object; if an object extending over an outer edge of the weigh platter is detected, not transmitting the weight of the object. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification