A vibration source identification method and system based on signal frequency domain characteristics
A technology of frequency domain characteristics and vibration sources, applied in the vibration source identification method and system field based on signal frequency domain characteristics, can solve the lack of vibration source identification methods and other problems, and achieve a fast and effective identification process
Active Publication Date: 2019-05-03
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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[0004] The main problem in the existing research is the lack of suitable vibration source identification method, therefore, it is necessary to establish an effective vibration source identification method to realize the identification of vibration signals, so as to reduce the error rate of vibration source identification
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[0070] 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 and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0071] Embodiment 1 of the present invention provides a vibration source identification method based on signal frequency domain characteristics. see figure 1 , the identification method specifically includes the following content:
[0072] Step 100: Obtain the vibration signals of the current vibration source at multiple alarm points.
[0073] ...
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The invention provides a vibration source identification method and system based on a signal frequency domain feature. The method comprises the steps that the vibration signals of the current vibration source at a number of alarm points are acquired; each vibration signal is preprocessed; energy detection is carried out on each vibration signal according to a standard signal to acquire the identification signal of the current vibration source; the correlation coefficient between each identification signal and the standard signal under different working conditions is acquired according to the signal frequency domain feature; and when knocking vibration signals are in the identification signal and the number of the knocking vibration signals is more than a second threshold, the current vibration source is identified as a knocking vibration source. The system comprises a vibration signal acquisition unit, a preprocessing unit, an energy detection unit, a correlation coefficient acquisition unit and a knocking vibration source identification unit. According to the invention, the knocking vibration signals can be accurately identified according to the signal frequency domain feature; the identification process is quick and effective; a reliable vibration source determining basis is provided for a control center; and the control center can make accurate and timely response according to the type of the vibration source.
Description
technical field [0001] The invention relates to the technical field of vibration source identification, in particular to a vibration source identification method and system based on signal frequency domain characteristics. Background technique [0002] With the rapid development of the global economy, society's demand for energy, especially oil and gas resources, is increasing day by day. In the national energy strategy, the construction and development of oil and gas storage and transportation are related to the overall strategy of providing long-term, stable, economical and safe energy security for national economic construction and social development. Nowadays, underground oil and gas transmission pipelines have become the main artery of energy transportation, and the issue of pipeline safety protection has become increasingly prominent in front of people. Once the pipeline leaks, it is very easy to explode, which not only affects the normal transportation of energy, but...
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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 曲洪权孙成斌盛智勇杨丹郑彤
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY