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Method for adjusting a resistance-gage force transducer and an adjusted force transducer thus obtained

  • US 4,688,434 A
  • Filed: 04/04/1986
  • Issued: 08/25/1987
  • Est. Priority Date: 04/09/1985
  • Status: Expired due to Fees
First Claim
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1. A method for adjusting a resistance-gage force transducer (resistance gages R1, R2, R3, R4) comprising a resilient bar (1) attached at one end to a stationary support (2) and subjected at the other end to the force (P) to be measured, said bar (1) being adapted to carry resistance gages (R1, . . . R4) electrically connected to each other so as to form a measuring bridge for delivering an electrical signal which is a function of the force applied to said other end of the bar, said transducer being adjustable by means of said method in such a manner as to ensure that said electrical signal is proportional to the applied force and insensitive to the torsional and flexural couples generated by the displacements of the point of application of the force (P) to be measured, said method being distinguished by the following steps:

  • A. Determination of the initial characteristics of the transducer,B. Computation of the relative errors of the transducer arising from a displacement of the applied force (P) as a function of the angle θ

    formed between the resistance gages (R1, . . . R4) and the longitudinal direction (Ox) of the bar,C. Cancellation of these errors by making modifications in one or a number of resistance gages in order to produce a modification of the angle θ

    aforesaid.

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