Variational Calibration

Abstract

The approach to the improving the accuracy of the impedance parameter measurements is described. This approach is based on the well-known variations of the influence of the disturbing factors on the results of measurement. Using these variations, measurement circuit provides the additional number of measurements, equal to the number of the disturbing factors. System of equations describes these results of measurements. The solution of this system eliminates the influence of the appropriate uncertainty sources on the results of measurement and gets the true result of the measured value. In addition, the solution of this system also gets the values of the uncertainty components in every measurement and possibility to monitor the properties of the measurement circuit. Examples of the realization of this method for improving the accuracy of the impedance parameter measurements in different bridges are given.

Hardware and Software Complex for Conductometric Measurements With High Metrological Reliability

“…Earlier studies have shown the possibility of significantly reducing these disadvantages due to the use of differential measurements using a measuring channel (MCh) with a balanced alternating current bridge [7][8][9][10][11][12]. The direction of their use with impedance sensors, in particular with conductometric ones, turned out to be very promising [6,9,13,14].…”