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Rotation device fault diagnosis device combining piezoelectric effect and electrostatic induction

A fault diagnosis device and electrostatic induction technology are applied in the fault diagnosis of electrical, rotating machinery, and mechanical fields to achieve the effects of simple structure, low cost and wide applicability

Active Publication Date: 2016-09-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no monitoring method that combines piezoelectric induction and electrostatic method. This patent proposes a rotating equipment status monitoring device that combines piezoelectric effect and electrostatic induction. Charged, and then use the electrostatic sensor to measure the charge on the surface of the material, so as to monitor the working state of the equipment

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  • Rotation device fault diagnosis device combining piezoelectric effect and electrostatic induction

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Embodiment Construction

[0018] The invention proposes a fault diagnosis device for rotating equipment, which uses the combination of piezoelectric effect and electrostatic induction to reflect the rotation during rotation on the surface charge of the piezoelectric material. When a fault occurs, the different characteristics of the fault will cause Different charges are generated on the surface of the material, and the use of electrostatic sensors to collect charge signals can obtain real-time rotation information, which can be input to a PC for fault diagnosis. The device includes several piezoelectric conversion elements, electrostatic sensors, signal conditioning unit and PC for fault identification. The device fixes a number of piezoelectric conversion elements on a rotating object, then conducts non-contact measurement through an electrostatic sensor, and finally uses a signal conditioning unit to amplify and filter the signal, and finally sends it to a PC for fault diagnosis. The piezoelectric c...

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Abstract

The invention discloses a rotation device fault diagnosis device combining piezoelectric effect and electrostatic induction. The device comprises a number of piezoelectric conversion elements, a number of electrostatic sensors, a signal conditioning unit and a PC. The piezoelectric conversion elements are fixed on a rotating object. The electrostatic sensors are arranged at places, wherein the distances from the places to the piezoelectric conversion elements are between 2mm and 6mm. The output of the electrostatic sensors is connected with a signal conditioning unit, undergoes analog-to-digital conversion, and is sent into the PC for signal analysis. The rotation device fault diagnosis device provided by the invention has the advantages of simple structure, low cost, wide applicability and the like, and acquires rotation signals.

Description

technical field [0001] The invention relates to the field of machinery and electricity, in particular to the field of fault diagnosis of rotating machinery. Background technique [0002] At present, rotating mechanical equipment widely exists in many fields such as petroleum, chemical industry, electric power, energy, aviation, etc. Due to the physical phenomena in operation, it is a reverse process to deduce the hidden fault inside the machine, which is very difficult. Data collection is difficult, and how to accurately monitor the working status of rotating equipment in real time has become a difficult problem. Condition monitoring currently mainly collects signals for condition monitoring through phenomena such as vibration, sound, and thermal phenomena during equipment operation, and provides necessary data and information for fault diagnosis. At present, vibration sensors are the most widely used, such as piezoelectric, piezoresistive, capacitive and other vibration se...

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Application Information

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IPC IPC(8): G01M13/02
CPCG01M13/028
Inventor 李林胡红利唐凯豪李思瑶
Owner XI AN JIAOTONG UNIV
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