Valve inner leakage detection method based on sound waves
A detection method and valve technology, applied in the direction of detecting the appearance of fluid at the leak point, using liquid/vacuum degree for liquid tightness measurement, etc., can solve the problems of high hardware equipment requirements, complex data processing, and high data collection frequency, Achieve the effect of low requirements for hardware equipment and simple and accurate data processing
Pending Publication Date: 2021-08-24
BEIJING UNIV OF CHEM TECH
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[0004] This application aims at the problems of high data acquisition frequency, complex data processing and high requirements on hardware equipment in the process of valve leakage detection in the prior art, and provides a valve internal leakage detection method based on sound waves, which is used to a certain extent Solve this technical problem in the prior art
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[0031] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.
[0032] figure 1 It is a schematic flow chart of the acoustic wave-based valve internal leakage detection method shown in the embodiment of the present application, as shown in figure 1 As shown, the sonic-based valve internal leakage detection method provided in the embodiment of the present application includes:
[0033] S101. Collect the real-time sound wave signal of the valve throu...
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The invention relates to a valve inner leakage detection method based on sound waves, and the method comprises the steps: firstly carrying out the feature extraction of sample sound wave signal data through a feature extraction method, obtaining a sample feature vector, carrying out the model training, and obtaining a diagnosis model; in actual detection, extracting features from collected to-be-detected real-time sound wave signal data through a feature extraction method, obtaining real-time feature vectors, then inputting the obtained real-time feature vectors into the diagnosis model, judging whether the real-time sound wave signal data are abnormal or not, and therefore whether the valve leaks or not is deduced. The whole process can support low-frequency collection, the data processing process is simple and accurate, the requirement for hardware equipment is low, and the problems that in the valve leakage detection process in the prior art, the data collection frequency is high, data processing is complex, and the requirement for the hardware equipment is high are solved.
Description
technical field [0001] The present application relates to the field of valve leakage detection, in particular to an acoustic wave-based detection method for valve internal leakage. Background technique [0002] Regarding valve leakage detection, scholars at home and abroad have studied a lot, and there are many detection methods, such as mass balance method, pressure drop method, acoustic emission and other detection methods. Compared with other methods, the acoustic emission method has higher sensitivity and stability, but the acquisition frequency is higher, and the cost for engineering implementation is higher. The acoustic emission detection method has the characteristics of convenience, non-destructiveness and high stability, and is currently the most widely used leak detection method. [0003] However, in the actual research and application process, the sampling frequency in experimental research is generally over 1MHz, which not only requires high processing speed of...
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IPC IPC(8): G01M3/24
CPCG01M3/24
Inventor 赖宗普林伟国
Owner BEIJING UNIV OF CHEM TECH