RU2012133371A - METHOD FOR REDUCING THE TEMPERATURE ERROR OF MEASURING MULTI-ORDERED DISPLACEMENTS OF SHOVELS OF SHOVELS WITH A SINGLE-TURNED VORTEX REDUCER - Google Patents
METHOD FOR REDUCING THE TEMPERATURE ERROR OF MEASURING MULTI-ORDERED DISPLACEMENTS OF SHOVELS OF SHOVELS WITH A SINGLE-TURNED VORTEX REDUCER Download PDFInfo
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- RU2012133371A RU2012133371A RU2012133371/28A RU2012133371A RU2012133371A RU 2012133371 A RU2012133371 A RU 2012133371A RU 2012133371/28 A RU2012133371/28 A RU 2012133371/28A RU 2012133371 A RU2012133371 A RU 2012133371A RU 2012133371 A RU2012133371 A RU 2012133371A
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- temperature
- thermocouple
- hot junction
- current lead
- shovels
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Способ уменьшения влияния температуры, при котором в одновитковом вихретоковом преобразователе во внутреннем проводнике его коаксиального токовода, соединяющего чувствительный элемент с объемным витком согласующего трансформатора, располагают термопару, горячий спай которой находится внутри токовода у его торца, обращенного к чувствительному элементу, экспериментально определяют семейства градуировочных характеристик во всем диапазоне температур, а также измеряют термопарой текущие значения температуры и по значениям выходных сигналов преобразователей на основе семейств градуировочных характеристик вычисляют координатные составляющие смещения торцов лопаток относительно чувствительных элементов, дополнительно располагают вторую термопару так, что ее горячий спай оказывается в месте контакта токовода с объемным витком согласующего трансформатора, а температура чувствительного элемента, учитываемая при вычислении координатных составляющих определяется как, где Θ- температура в области расположения горячего спая первой термопары, размещенной во внутреннем проводнике коаксиального токовода; Θ- температура в области расположения горячего спая второй термопары, размещенной в месте контакта токовода с объемным витком согласующего трансформатора; l, l- расстояния от чувствительного элемента до горячего спая первой и второй термопары соответственно.A method for reducing the influence of temperature at which a thermocouple is located in a single-turn eddy current transducer in the inner conductor of its coaxial current lead connecting the sensing element to the volume coil of the matching transformer, the hot junction of which is located inside the current lead at its end facing the sensitive element, experimentally determine the family of calibration characteristics over the entire temperature range, as well as measure the current temperature values using a thermocouple Using the calibration characteristics, the coordinate components of the displacement of the ends of the blades relative to the sensitive elements are calculated, an additional thermocouple is placed so that its hot junction is at the point of contact of the current lead with the volume coil of the matching transformer, and the temperature of the sensitive element taken into account when calculating the coordinate components is determined as , where Θ is the temperature in the region of the hot junction of the first thermocouple located inside it tokovoda coaxial conductor; Θ - temperature in the region of the hot junction of the second thermocouple located at the point of contact of the current lead with the volume coil of the matching transformer; l, l are the distances from the sensor to the hot junction of the first and second thermocouples, respectively.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2012133371/28A RU2519844C2 (en) | 2012-08-03 | 2012-08-03 | Method for reducing temperature error of measurement of multicoordinate displacements of blade ends by single-coil eddy-current transducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2012133371/28A RU2519844C2 (en) | 2012-08-03 | 2012-08-03 | Method for reducing temperature error of measurement of multicoordinate displacements of blade ends by single-coil eddy-current transducer |
Publications (2)
Publication Number | Publication Date |
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RU2012133371A true RU2012133371A (en) | 2014-02-10 |
RU2519844C2 RU2519844C2 (en) | 2014-06-20 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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RU2012133371/28A RU2519844C2 (en) | 2012-08-03 | 2012-08-03 | Method for reducing temperature error of measurement of multicoordinate displacements of blade ends by single-coil eddy-current transducer |
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RU (1) | RU2519844C2 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2231750C2 (en) * | 2001-10-18 | 2004-06-27 | Институт проблем управления сложными системами РАН | Method of and device for measuring parameters of movement of turbomachinerotor blade and faces |
US6949922B2 (en) * | 2002-05-31 | 2005-09-27 | Siemens Westinghouse Power Corporation | Turbine blade clearance on-line measurement system |
US7323868B2 (en) * | 2005-09-21 | 2008-01-29 | General Dynamics Advanced Information Systems, Inc. | System and method for temperature independent measurement of standoff distance using an eddy current sensor |
US7162384B1 (en) * | 2005-09-21 | 2007-01-09 | General Dynamics Advanced Information | System and method for temperature compensation of eddy current sensor waveform parameters |
RU2006125534A (en) * | 2006-07-18 | 2008-01-27 | Закрытое акционерное общество научно-исследовательский институт интроскопии Московского научно-производственного объединени "Спектр" (RU) | METHOD FOR REDUCING THE TEMPERATURE ERROR OF A VORTEX REDUCER |
RU2390723C1 (en) * | 2008-12-30 | 2010-05-27 | Институт проблем управления сложными системами РАН | Procedure for measurement of coordinate constituents of offset of ends of turbo-machines rotor blades |
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- 2012-08-03 RU RU2012133371/28A patent/RU2519844C2/en not_active IP Right Cessation
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Publication number | Publication date |
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RU2519844C2 (en) | 2014-06-20 |
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MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20200804 |