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Sectional magnetic encoding method and system for mMeasuring rotating shaft parameters

A shaft parameter and magnetic encoding technology, applied to devices using electric/magnetic methods, acceleration measurement using inertial force, measuring devices, etc., can solve problems such as limited accuracy, difficulty, and complex sensor layout

Inactive Publication Date: 2011-11-23
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system has accuracy issues when applied to large diameter shafts, and practical implementation issues
Furthermore, direct utilization of the magnetostrictive effect in ferromagnetic materials to measure shaft parameters requires complex sensor arrangements, difficult calibration procedures, and often results in limited accuracy

Method used

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  • Sectional magnetic encoding method and system for mMeasuring rotating shaft parameters
  • Sectional magnetic encoding method and system for mMeasuring rotating shaft parameters
  • Sectional magnetic encoding method and system for mMeasuring rotating shaft parameters

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Embodiment Construction

[0020] As discussed in detail below, embodiments of the invention relate to non-contact measurement of rotational axis parameters. As used herein, the phrase "magnetically encoded" refers to magnetizing a section of a shaft by flowing an electric current in the axial direction of the shaft. The present invention proposes a system and method of segmented magnetic encoding and sensor arrangement around a magnetically encoded shaft for measuring various shaft parameters during shaft rotation.

[0021] When introducing elements of various embodiments of the invention, the articles "a," "the," and "said" are intended to mean that there are one or more of such elements. The terms "comprising", "comprising" and "having" are intended to be inclusive and mean that there may be additional elements other than the listed elements. Any instance of an operating parameter is not exclusive of other parameters of the disclosed embodiments.

[0022] figure 1 A magnetic encoding system 10 is ...

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Abstract

The title of the invention is sectional magnetic encoding method and system for measuring rotating shaft parameters. A method for non-contact measurement of multiple shaft (600) parameters is provided. The method includes magnetically encoding (602) multiple sections of the shaft (12,52,102,302) using pulsed currents. The method also includes sensing a magnetic field of the encoded sections of the shaft using multiple sensors (604) arranged circumferentially about the shaft. Further, the method includes generating a spectrum of periodical variations based on sensed magnetic field (606) of the encoded sections (64,66,68,70) of the shaft during rotation and determining (608) multiple parameters based on recurrences of patterns of the spectra.

Description

technical field [0001] In general, the present invention relates to non-contact measurement of rotating shaft parameters, and more particularly to methods and systems of segmented magnetic encoding and sensor arrangements for measuring shaft parameters. Background technique [0002] In general, there are numerous rotary shaft applications in industry to perform some form of work or energy conversion. Rotating shafts are still used for current windmills and hydroelectric plants, but they incorporate advanced technology and processing. Rotary shafts are also used in electronic devices such as computer disk drives, media recorders / players, and home appliances, and generally have a small length and width, resulting in relatively low torque. Larger rotating shafts have greater torque and they are deployed in applications including locomotives, aircraft, ships and energy conversion, just to name a few. Modern usage of devices using larger axes of rotation often combine sensing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/48G01P15/08G01L3/00G01M1/16G01D5/244
CPCG01D5/145G01B7/30G01H11/02G01L3/104G01L7/106G01D2205/80
Inventor C·M·施勒T·A·策尔斯J·W·布雷K·F·O·劳姆
Owner GENERAL ELECTRIC CO