Weighing scales – With testing
Patent
1990-11-01
1991-12-24
Miller, Jr., George H.
Weighing scales
With testing
177185, G01G 1952, G01G 2310
Patent
active
050743686
ABSTRACT:
Two embodiments of a low profile weight sensor for a weight sensing system for monitoring article input and removal from article storage apparatus comprises a plate or I-shaped bar support member having first and second sections, an integrally formed linkage system for connecting the first and second sections such that the sections are substantially coplanar in an unloaded state, and are relatively displaceable with respect to each other in response to a weight load applied to one of the sections; and a magnetic transducer mounted on surfaces extending in the thickness direction of the plate/bar member for producing an electrical output signal responsive to relative displacement of the first and second sections. The article input and removal monitoring system also comprises self calibrating apparatus comprising circuitry for measuring the stability of weight measurements obtained from the weight sensors and producing a limit value, circuitry responsive to the weight sensing circuitry for signalling an operator and automatically taking first and second test measurements to obtain a calibration weight value, and circuitry for comparing the calibration weight value with a predetermined multiple of the limit value and signalling an invalid calibration if the calibration weight value is less than the predetermined multiple of the limit value.
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K-Tron Technologies Inc.
Miller Jr. George H.
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