Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With electromagnetic wave
Patent
1998-12-15
2000-05-16
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
With electromagnetic wave
G01S 1500
Patent
active
060646292
ABSTRACT:
A method and apparatus for ensuring accuracy of weight measurement of objects on a conveyor and providing security against pilferage or miscoding of the objects. A series of sensors such as photocells linked to a process control unit sense passage of objects to respectively activate a scale and cubing system associated with the conveyor, to release an additional object for weighing and cubing, to sense overlong objects exceeding the length of the scale, and to detect when an object has been stolen or otherwise removed (as by falling off) the conveyor between various locations through the use of programmed timing "windows" between the various sensors. If an object does not trigger a sensor within the window measured from passage past a preceding sensor, an error message is generated.
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Kennington Robert L.
Stringer Bradley J.
Pihulic Daniel T.
Quantronix, Inc.
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