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Thermal pipeline leak detection method
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A leakage detection and pipeline technology, which is applied in the pipeline system, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problems of thermal pipeline leakage and insufficient precision, and achieve the effect of strong applicability and improved level
Active Publication Date: 2020-01-07
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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[0003] The embodiment of the present application provides a thermal pipeline leakage detection method, which solves the problem that the existing technology needs to check the location of the thermal pipeline and the accuracy is insufficient
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Embodiment 1
[0028] figure 1 It is a flowchart of an embodiment of a thermal pipeline leakage detection method.
[0029] This application proposes a thermal pipeline leakage detection method, including the following steps:
[0030] Step 101, collecting the background noise of the pipeline, and constructing a background noise database according to the Manhattan distance.
[0031] In step 101, the newly collected background noise signal is calculated with the Manhattan distance from all signals in the background noise database to obtain the first maximum value. If the first maximum value is greater than the Manhattan distance threshold, the signal is added to the background noise database. Get the background noise database.
[0032] For example, let the Manhattan distance threshold of the background noise signal be T md , the newly collected background noise signal N, calculate the Manhattan distance with all the signals in the background noise database respectively, and get the first max...
Embodiment 2
[0079] figure 2 It is a flow chart of another embodiment of a heat pipeline leakage detection method.
[0080] This application proposes a thermal pipeline leakage detection method, including the following steps:
[0081] Step 101, collecting the background noise of the pipeline, and constructing a background noise database according to the Manhattan distance.
[0082] Step 102, extract effective noise signals according to the maximum time-frequency oscillation ratio of the background noise database.
[0083] Step 103, extracting the suspected leakage noise signal through the noise clustering method and the category delineation method.
[0084] Step 104, according to the Mahalanobis distance of joint feature similarity in the time-frequency domain, determine whether the noise signal is a leakage noise signal or a background noise signal.
[0085] Further, the following steps are also included:
[0086] Step 105, adding the noise signal of the wrong category into the backg...
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Abstract
The invention discloses a thermal pipeline leak detection method. The problems that the prior art needs to check the location of a thermal pipeline and the accuracy is insufficient are solved. The thermal pipeline leak detection method comprises the steps that background noise of a pipeline is collected, and a background noisedatabase is constructed based on the Manhattan distance; an effective noisesignal is extracted based on the maximum time-frequency oscillation starting ratio of the background noisedatabase; a noise clustering method and a class delimitation method are used for extracting a suspected leakage noisesignal; and according to the mahalanobis distance of the joint feature similarity in a time-frequency domain, it is determined whether the noise signal is a leakage noisesignal or a background noise signal. According to the thermal pipeline leak detection method, a noise recorder is used for collecting pipeline noise signals, pipeline leakage noise is detected and discriminated in real time, pipeline leak is timely found and alarming is issued, and a basis for scientific maintenance of pipeline operation is provided.
Description
technical field [0001] The present application relates to the fields of machine learning and pattern recognition, and in particular to a method for detecting leakage of thermal pipelines. Background technique [0002] With the acceleration of my country's urbanization process, central heating has achieved vigorous development. However, the construction level of existing heating pipelines is low, and leakage is serious, resulting in huge waste of energy and loss of pipeline investment. Due to the poor construction quality of the heating network, it is difficult to find pipeline leakage. The detection of medium leakage faults in the pipeline basically relies on very inefficient and backward methods such as boosting pressure and closing valves in sections to find leaking pipe sections, and then through correlators, listening rods, and ultrasonic waves. Detector, etc. to find leaks. Using the above-mentioned instruments to find the leak point requires manual inspection at the ...
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Application Information
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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/06
CPCF17D5/06
Inventor 郭慧杰李雨龙李雪倪娜
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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