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RFID-based rotating machinery eccentricity detection method and device

A technology for rotating machinery and eccentricity detection, which is applied in the field of RFID applications and can solve problems such as high cost

Active Publication Date: 2018-03-09
TSINGHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In order to obtain this information, it is usually necessary to embed special sensors and data acquisition instruments, which are expensive

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  • RFID-based rotating machinery eccentricity detection method and device
  • RFID-based rotating machinery eccentricity detection method and device
  • RFID-based rotating machinery eccentricity detection method and device

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Embodiment Construction

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] see figure 1 , this embodiment discloses a method for detecting eccentricity of a rotating machine based on RFID, including:

[0048] S1. Periodically read the signal returned by the RFID tag, wherein the RFID tag is attached to the rotor surface of the rotating machine, and the signal includes signal strength, phase value and time;

[0049] S2. By estimating t...

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Abstract

The invention discloses a RFID-based rotating machinery eccentricity detection method and device, which is characterized in that eccentricity detection is accurate and can be done in a real-time manner; generality is strong, non-intruding type is adopted, and cost is low. The method comprises the steps that the signal returned by an RFID label can be read periodically; through estimating the probability distribution of two characteristics before and after the eccentricity, the sequence corresponding to the time interval and phase difference between adjacent E points among a plurality of continuously-read E points can be converted into a non-eccentric state sequence and an eccentric state sequence, and the presence probability of non-eccentric state sequence under non-eccentric situation and the presence probability of eccentric state sequence under eccentric situation can be calculated; the probability of non-occurring of eccentricity can be calculated based on the presence probabilityof non-eccentric state sequence under the un-eccentric situation, and the probability of the occurring of eccentricity can be calculated based on the presence probability of eccentricity state sequence under the eccentric situation, and the occurring of eccentricity can be determined when it is judged that the occurring probability of eccentricity is larger than non-occurring probability of eccentricity.

Description

technical field [0001] The invention relates to the field of RFID application in wireless networks, in particular to an RFID-based method and device for detecting eccentricity of rotating machinery. Background technique [0002] Rotating machinery is used in a wide range of industrial equipment, ranging from small horses to large generators. Rotating machinery often plays a key role in the operation of equipment and consumes most of the manufacturing costs. Therefore, ensuring the proper functioning of rotating machinery is of paramount importance. [0003] The rotor in a rotating machine generates centrifugal force when it rotates. When the speed becomes high, the strong centrifugal force can make the central axis of the rotor deviate from its initial position, which is the so-called "eccentricity" phenomenon. Many industrial accidents and losses are caused by the eccentricity of rotating machinery. Therefore, detecting eccentricity within a specified time has become an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B15/00G06F17/50G06K17/00
CPCG01B15/00G06F30/20G06K17/00
Inventor 何源郑逸伦郑霄龙刘云浩
Owner TSINGHUA UNIV