The parameters of unconventional double-current circuit, their accuracy measures and measurement of strain and temperature

Authors

  • Zygmunt Lech Warsza Research Institute of Automation and Measurements PIAP
  • Adam Idźkowski Bialystok University of Technology
  • Wojciech Walendziuk Bialystok University of Technology

Abstract

The two-voltage-output circuit called a double-current bridge is presented. A single DC current source is switched over and connected in turns to opposite arms of the four-element bridge circuit. The output voltages are dependent on the arm resistance increments and their values are given in absolute and relative units. The simplified signal conditioning formulas of strain and temperature simultaneous measurement of a cantilever beam are featured. The results achieved with the use of the circuit are also published. The accuracy measures (actual errors, limited errors and standard uncertainties) of the bridge transfer functions are described.

References

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Published

2014-12-07

Issue

Section

Metrology, Measurement Science