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Weighing apparatus

  • US 5,515,737 A
  • Filed: 05/08/1995
  • Issued: 05/14/1996
  • Est. Priority Date: 12/03/1992
  • Status: Expired due to Fees
First Claim
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1. A weighing apparatus for measuring the weight of an object to be weighed by electrically processing the weight of the object, which apparatus comprises:

  • a load cell for outputting a load signal in proportion to a load imposed thereon by the object to be weighed; and

    a signal processing circuit, connected to the load cell, for processing the load signal from the load cell to provide a weight signal indicative of the weight of the object to be weighed, wherein;

    said load cell includes a strain inducing element capable of inducing strains in response to application of the load imposed on the load cell, and a bridge circuit having first and second strain gauges and a series-connected circuit comprised of a plurality of resistors,said signal processing circuit receiving both of a load signal delivered from a junction between the first and second strain gauges and a reference voltage signal delivered from a junction between the resistors in the bridge circuit, andsaid signal processing circuit including an analog-to-digital converter for converting the load signal into a digital load signal, and receiving a second reference voltage indicative of the level of an input signal applied to the analog-to-digital converter.

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