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Pipeline Corrosion Prediction Method Under Subway Stray Current Based on Partial Least Squares Method

A technology based on partial least squares and stray currents, applied in the field of pipe corrosion prediction under stray currents of subways based on partial least squares, can solve problems such as hidden dangers of passengers' safe travel, economic losses, and electrochemical corrosion of buried metals

Active Publication Date: 2021-09-17
GUANGZHOU METRO DESIGN & RES INST
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Problems solved by technology

Long-term stray current leakage will cause serious electrochemical corrosion to the buried metal along the subway line, which will cause huge economic losses and bring huge hidden dangers to the safe travel of passengers

Method used

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  • Pipeline Corrosion Prediction Method Under Subway Stray Current Based on Partial Least Squares Method
  • Pipeline Corrosion Prediction Method Under Subway Stray Current Based on Partial Least Squares Method
  • Pipeline Corrosion Prediction Method Under Subway Stray Current Based on Partial Least Squares Method

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Embodiment 1

[0047] Such as figure 1 As shown, one section includes two traction substations, rails, trains, catenary, buried pipelines and stray current detection systems: stray current microcomputer management system, stray current monitoring system, 100 sensors. The sensor data is summarized by the stray current detection system, and then transmitted to the stray current microcomputer management system for processing, analysis and prediction. The technical scheme adopted in the present invention is: a method for predicting the corrosion current density of subway stray current pipelines based on partial least squares method, the method comprising the following steps:

[0048] Step S1: In a running interval, according to the operating conditions of the train (acceleration, constant speed, deceleration), set 65 sample parameter measurement points in the interval, and lay 100 sensors at equal intervals along the track, such as figure 1 As shown, the surface potential is measured at each m...

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Abstract

The invention discloses a method for predicting pipeline corrosion under stray currents of subways based on partial least squares method, comprising the following steps: 1. Selection of test points, finite element simulation; 2. Data preprocessing; 3. Obtaining training samples; 4. The second step 1. Selection of principal component pairs; 5. Regression of dependent variables and independent variables on principal components; 6. Residual matrix replacement; 7. Establishment of partial least squares regression equation; 8. Cross validity verification; 9. Redundant position variables 10. Test sample test. In the present invention, the surface potential data obtained in the interval is combined with the finite element simulation to obtain an effective prediction of the corrosion current density of the pipeline. According to the partial least square method, the prediction regression equation is obtained, and the corrosion situation of the pipeline is judged. While reducing the number of sensors, the invention can Keeping the prediction accuracy within an acceptable range has great practical significance for visually monitoring pipeline corrosion and saving costs.

Description

technical field [0001] The invention relates to the technical field of subway rail transit, in particular to a method for predicting pipeline corrosion under stray current of subway based on partial least square method. Background technique [0002] With the continuous development of society, my country's urbanization process is also in full swing, and the congestion problem caused by the urban transportation system cannot be underestimated. The urban rail transit system dominated by subways has the characteristics of large transport capacity, small footprint, environmental protection, safety and airtightness, etc. It is gradually relieving urban traffic pressure, improving residents' travel comfort, enhancing the city's image, and driving the linkage of the whole city. Catalyst for rapid development. At present, my country's subway mainly adopts DC750V or DC1500V DC traction power supply system. The traction substation provides traction current for the operation of subway ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F17/18G06F17/11G06K9/62G06Q50/08G06F113/14
CPCG06F30/23G06F17/18G06F17/11G06Q50/08G06F2113/14G06F18/2135
Inventor 林珊农兴中袁江陈霞王红燕崖尚松陆云王洪杰王哲元黄凤至高杰黄忠兴林志立阮艳妹张悦徐文田罗旭赵美君邓树黄强谌小莉卢小莉邓婕申俊逸
Owner GUANGZHOU METRO DESIGN & RES INST
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