Oscillation detection method based on discrete cosine transform
A discrete cosine transform and detection method technology, applied in the field of automation, can solve the problems of many monitoring points, increased data volume, long data collection time, etc., and achieve the effect of avoiding abnormal conditions
Inactive Publication Date: 2018-11-13
SHANDONG UNIV OF SCI & TECH
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As the complexity of equipment increases, the monitoring of equipment operation often has the characteristics of many monitoring points, high sampling frequency of monitoring points, and long data collection time, which makes the amount of data that needs to be processed by the equipment fault diagnosis system show an explosive growth.
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[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0027] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0028] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...
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The invention relates to the technical field of automation of fault diagnosis and the like and especially relates to an oscillation detection method based on discrete cosine transform. According to the oscillation detection method disclosed by the invention, the discrete cosine transform is improved to perform periodic hypothesis testing and amplitude hypothesis testing on an iDCT signal corresponding to a signal and choose an appropriate time window; thus, the situations that whether oscillation exists in the signal, which data section that the oscillation exists and what the oscillation period and oscillation amplitude can be automatically detected. The oscillation detection method disclosed by the invention has the beneficial effects of helping operators to find the oscillation existingin the signal, further guiding the operators how to compensate the oscillation and avoiding unusual conditions.
Description
technical field [0001] The invention relates to the technical field of automation such as fault diagnosis, in particular to an oscillation detection method based on discrete cosine transform. Background technique [0002] Fault diagnosis technology is one of the important technologies to ensure the safe and stable operation of industrial production equipment. Fault diagnosis technology realizes the prediction and diagnosis of equipment operation faults through the monitoring of equipment operation status and the analysis and processing of corresponding data, and judges whether the equipment is in an abnormal state. As the complexity of equipment increases, the monitoring of equipment operation often has the characteristics of many monitoring points, high sampling frequency of monitoring points, and long data collection time, which makes the amount of data that the equipment fault diagnosis system needs to process an explosive growth. Therefore, it is the main research direc...
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IPC IPC(8): G01R23/16
CPCG01R23/16
Inventor 王建东杨子江周东华
Owner SHANDONG UNIV OF SCI & TECH