초록 ▼

A weight measuring apparatus comprising a plurality of load sensors, together with an input network, a multiplexer, a reference, an analog to digital converter, and a processor, wherein the input network includes an analog summing network and direct sensor connections to the multiplexer. The multipl

A weight measuring apparatus comprising a plurality of load sensors, together with an input network, a multiplexer, a reference, an analog to digital converter, and a processor, wherein the input network includes an analog summing network and direct sensor connections to the multiplexer. The multiplexer is arranged to permit measurement of the sum signal, a reference signal, and each direct load sensor signal in a prescribed sequence. The multiplexed signals are converted to digital and processed to derive a weight estimate based on the multiplexed measurements and a system error model. The prescribed measurement sequence permits measurement of the sum signal more frequently than each of the direct signals. A method is described for deriving correction factors for the error model comprising the placing of calibration weights primarily on each weight sensor and solving the system of simultaneous equations for the resulting correction factors.

대표청구항 ▼

[ What is claimed is:] [1.] A method of increasing the output rate of a scale system which multiplexes among a plurality of sensors comprising the following steps:(1) producing a set of sensor signals from a plurality of load sensors;(2) generating an approximate weight estimate signal based at leas

[ What is claimed is:] [1.] A method of increasing the output rate of a scale system which multiplexes among a plurality of sensors comprising the following steps:(1) producing a set of sensor signals from a plurality of load sensors;(2) generating an approximate weight estimate signal based at least in part on the sensor signals;(3) sampling the approximate weight signal and the sensor signals according to a prescribed sampling sequence wherein the approximate weight signal is sampled more frequently than at least one of the sensor signals;(4) converting the sampled signals to digital representations;(5) processing the digital representations of the sensor signals and the approximate weight signal together with a system error model to derive a corrected weight value;(6) outputting the corrected weight in association with the sampling of the approximate weight signal.