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Method and system for vibration signal processing

A technology of vibration signal and processing method, which is applied in the direction of measuring vibration, vibration measurement in solids, instruments, etc., and can solve problems such as enhancement

Inactive Publication Date: 2008-09-24
GENERAL ELECTRIC CO
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  • Claims
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Problems solved by technology

One drawback of detection is that its digital implementation requires enhanced signal processing due to the number of filtering steps

Method used

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  • Method and system for vibration signal processing
  • Method and system for vibration signal processing
  • Method and system for vibration signal processing

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Embodiment Construction

[0039] The present invention relates to vibration signal analysis that can be used to account for bumps or squeezes hidden in normal vibrations read by low frequency vibrations and high frequency noise. By using the noise vibration signal technique of the present invention, a higher signal-to-noise ratio (SNR) can be obtained. The enhanced signal-to-noise ratio makes it easy to distinguish spectral peaks of interest from the noise floor, enabling early detection of emerging machine failures.

[0040] Preferred Embodiment of the System

[0041] refer to figure 1 , the simplified process flow of the preferred system is shown generally at 100 . The system 100 for vibration signal processing includes one or more vibration sensors 102 for generating electronic vibration signals representative of sensed mechanical vibrations. Sensor 102 is typically an accelerometer, but other sensors capable of sensing mechanical vibration and representing that vibration in an electronic vibrati...

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Abstract

The invention relates to a method for vibration signal processing and a system, for obtaining situation of collision or extrusion incident hidden in normal vibration through low-frequency and high-frequency noise. In a optimized embodiment manner, the method of the invention comprises the steps of: obtaining electrical vibration signals having amplitudes and frequencies that represent mechanical vibrations of a machine; converting the electrical vibration signals into digital vibration samples; dividing the digital vibration samples into equal time intervals; determining the average absolute amplitude of the digital vibration samples for each time interval; generating a time waveform comprising the determined average amplitudes; and processing the time waveform as if it were an independently-detected signal. The invention provides a method and a system for accomplishing detection type processing, with high signal to noise ratio (SNR), without strong signal processing, or at least provides available choice to the public.

Description

technical field [0001] The invention relates to a vibration signal processing method and system. In particular, but not limited to, the present invention relates to methods and systems for mechanical fault detection using rectification processing for obtaining bump or crush conditions hidden in normal vibration readings. Background technique [0002] Detection is the vibration analysis process used to capture the situation of specific mechanical problems hidden in normal vibration readings to prevent premature corrective action. Typically, this occurs when the vibration is associated with a bump or crush situation. This situation occurs frequently but does not last long. Unfortunately, these vibration situations are masked due to the relatively long duration of the low frequency vibration when the vibration reading is initiated. [0003] In use, the detection first uses a high-pass filter to filter out the low-frequency part of the vibration signal. In order to make the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H1/00
Inventor 奈杰尔·利卡尔·奥姆德森
Owner GENERAL ELECTRIC CO
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