Invariant Transformation in Measuring Systems With Parametric Sensors

Chernetsov, M. V.; Churakov, Pyotr P.

doi:10.21685/2307-5538-2018-1-2

Cited by 1 publication

(3 citation statements)

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“…If the listed requirements are fully fulfilled it is possible to approach the fulfillment of the conditions (10). And, accordingly, additional error of the transducer, the model of which is represented by the expression (8), will be reduced.…”

Section: The Implementation Of the Technological Methodsmentioning

confidence: 99%

“…Expression (8) does not take into account the contribution of differential amplifier 7. Taking into account the transmission coefficient of the differential amplifier 7 after similar transformations we can (10) supplement with the condition:…”

Section: The Implementation Of the Technological Methodsmentioning

confidence: 99%

“…Petrov formulated the two-channel principle [7], which was essentially a necessary condition for compensating external disturbing influences on measuring devices. The combination of necessary and sufficient conditions, which is based on the mentioned principle, makes it possible to formulate and implement in the corresponding structures methodical features, which form the basis of a particular method and are implemented in the corresponding class of invariant measuring devices [8][9][10][11]. The fundamental difference between the methods of the theory of invariance and the methods of automatic correction of errors is such an organization of the structure of the system that provides compensation for disturbances inside it with the general instability of the component elements.…”

Section: Introductionmentioning

confidence: 99%

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Application of Two-Channel Principle in Measuring Devices to Compensate for Disturbing Influences of Unknown Physical Nature

Нестеров¹,

Ли²

2020

Prib. metody izmer.

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The article notes the advantages of the method of constructing absolutely invariant measuring transducers for working in conditions with disturbing influences. However, this method is not universal. Its limitations are due to the impossibility of "symmetric" transmission of all disturbing influences into parallel measuring channels. A broader interpretation of the two-channel principle is proposed to overcome these limitations. The aim of the study was to substantiate and implement a method for constructing quasi-invariant measuring transducers and systems that retain their metrological characteristics under external disturbances of unknown physical nature.The theory that develops the two-channel principle to a full-fledged technological method is presented in the article. The theory includes the necessary and sufficient conditions for physical feasibility this method. Two fundamental tasks have been solved in the work. The first task is to identify signs that reflect the essence of the technological method in to specific cases and the second is to implement a methodology that allows these signs to be effectively applied in practice.In the examples, a complex of technologies is defined for groups of elements of quasi-invariant transducers that provide compensation of the influencing factors acting on them with acceptable accuracy.There are significant advantages in discussed method. It gives hope for acceptable measurement results under conditions when character and even physical principle of influencing a priori are unknown.

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Section: The Implementation Of the Technological Methodsmentioning

confidence: 99%

Section: The Implementation Of the Technological Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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