METHOD TO CORRECT CHARACTERISTICS OF MEASURING CONVERTERS Russian patent published in 2014 - IPC G01R35/00 

FIELD: measurement equipment.

SUBSTANCE: method consists in separation of measurement channels of main and additional (influencing) input values in a converter, calibration of channels of the measuring converter under various combinations of its input values, generation of a mathematical model of the measuring converter following the results of calibration in the form of a combination of its parameters, which connects the values of output values with values of input values, and determination of the value of the main input value according to parameters of the mathematical model and current values of outputs values, besides, in process of the calibration experiment they stabilise the main input value in several points of the conversion range, in each point of stabilisation of the main input value they realise the stepped variation of the influencing input value within the limits of the range of its variation with different initial values and differing in the sign and amplitude by increments, they record the behaviour of input and output values of the measuring channels of the main and influencing input values in time, they organise an additional virtual channel of determination of the speed of variation of values of the influencing value measurement channel, afterwards they generate a mathematical model that connects the output values of the main, additional and virtual channels with input values of the converter, and finally they determine the current value of the main input value according to parameters of the mathematical model and current values of the output values of the main, additional and virtual measuring channels.

EFFECT: higher accuracy of measurement.

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