RF multiple load cell scale

Details RF multiple load cell scale RF multiple load cell scale

2005-07-19

2005-07-19

Gibson, Randy W. (Department: 2841)

Weighing scales

Computer

Electrical

C177S132000, C177S134000, C177S199000, C340S666000, C702S173000

Reexamination Certificate

active

06919516

ABSTRACT:
Load cells forming one or more weighing scales are connected to each other and to a common concentrator which communicates to a master controller in the control house via RF wireless communication. The load cells are polled by and provide weight reading to concentrator to the master controller. A digital load cell is used which includes a rocker pin, guided beam, torsion ring or other counterforce, a circuit board mounted on the counterforce and an enclosure sealing the circuit board and all but the load bearing surfaces of the counterforce and a mounded antenna. The circuit board includes a microcomputer and a transceiver. RF communication is provided with the circuit board through a antenna mounted on the enclosure. One or a number of load cells may be connected to a computer or controller to form one or more weighing scales with one or more weighing scales connect to a control house through wireless RF communication. The preferred embodiment uses passive receivers for receiving the signals and waveguide to minimize power requirements.

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David Cheng, “Field and Wave Electromagnetics”, Addison-Wesley Publishing Co. (ISBN 0-201-01239-1), Mar. 1985, pp. 370, 371, 443, & 444.

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