Analysis of temperature influence on the informative parameters of single-coil eddy current sensors
| Autor: | O. P. Skobelev, S. Yu. Borovik, M. M. Kuteynikova, Yu. N. Sekisov |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Turbine blade business.industry Acoustics Single coil Condensed Matter Physics 01 natural sciences Turbine law.invention Conductor Physics::Fluid Dynamics 010309 optics law Electromagnetic coil 0103 physical sciences Eddy current Electrical and Electronic Engineering Photonics Transformer business Instrumentation |
| Zdroj: | Optoelectronics, Instrumentation and Data Processing. 53:395-401 |
| ISSN: | 1934-7944 8756-6990 |
| Popis: | This paper describes the study of temperature in the flowing part of a turbine on the informative parameters (equivalent inductances of primary windings of matching transformers) of single-coil eddy-current sensors with a sensitive element in the form of a conductor section, which are used as part of automation systems for testing gas-turbine engines. In this case, the objects of temperature influences are both sensors and controlled turbine blades. The existing model of electromagnetic interaction of a sensitive element with the end part of a controlled blade is used to obtain quantitative estimates of temperature changes of equivalent inductances of sensitive elements and primary windings of matching transformers. This model is also used to determine the corresponding changes of the informative parameter of the sensor in the process of experimental studies of temperature influences on it (in the absence of blades in the sensitive region). This paper also presents transformations in the form of relationships of informative parameters with radial and axial displacements at normal (20 °C) and nominal (1000 °C) temperatures, and their difference is used to determine the families of dominant functions of temperature, which characterize possible temperature errors for any radial and axial displacements in the ranges of their variation. |
| Databáze: | OpenAIRE |
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