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Load cell assembly with linearization and common mode discrimination of complementary force-responsive signals

  • US 5,629,489 A
  • Filed: 02/06/1995
  • Issued: 05/13/1997
  • Est. Priority Date: 02/06/1995
  • Status: Expired due to Fees
First Claim
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1. A load cell assembly for generating a force value indicative of an applied force, the load cell assembly comprising:

  • a load cell body adapted to receive the applied force;

    first and second sensing means, coupled to the load cell body, for respectively providing first and second sensed signals which react in a complementary manner in response to the applied force on the load cell body;

    means for sampling the first and second sensed signals at predetermined intervals of time to produce first and second change values representative of changes in the values of the first and second sensed signals over such predetermined time interval, each of said first and second change values having a magnitude value and a direction of change;

    means for determining when the directions of change in the first and second change values are different; and

    force calculating means, responsive to the determining means, for calculating the force value of the applied force from the magnitudes of the first and second change values.

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