ERROR ANALYSIS OF THE MEASURING CIRCUIT OF CONVERTERS OF PARAMETERS OF THE INDUCTIVE SENSOR

Grachev Andrey Vladimirovich, head of technical means education department, Penza State University (40 Krasnaya street, Penza, Russia), andrean@mail.ru

621.317.33

10.21685/2307-5538-2018-3-10

Background. The inductive sensors IS can be used in devices of measurement of structure of liquid environments, humidity of loose and solid materials. Inductive sensors provide a number of advantages in front of more widespread konduktometrichesky sensors, for
example, allow to carry out more exact measurements of moving materials or the hostile and toxic environment which is in ampoules. Inductive sensors have gained smaller distribution because of complexity of a design and emergence of resonant effects in total with a capacity of IS.
Materials and methods. The analysis of errors is carried out for the four-element equivalent circuit of IS taking into account actual parameters, used in the multichannel converter of parameters of electrophysical properties of substances by method of the theory of the directed counts.
Results. The operator equations of the output tension of the active measuring scheme bearing information on all IDES parameters are worked out. Transition from an operator form of the equations in temporary and the analysis of errors is carried out with use of symbolical transformation in the Maple software product. Schedules of the calculated errors are submitted.
Conclusions. The carried-out analysis of errors has allowed to define requirements and to choose the OA type. Ranges of admissible measurements of values of not informative parameters of inductive sensors have been determined by values of an error of invariancy.

the analysis of an error, the unifying converters of parameters of electrophysical properties of substances, the equivalent circuit of the inductive sensor