Partial least square method-based pipeline corrosion prediction method under metro stray current

A partial least squares method and partial least squares technology, which is applied in the field of pipeline corrosion prediction based on partial least squares method under stray current in subway, can solve problems such as economic loss, hidden danger of passenger safety travel, and electrochemical corrosion of buried metals.

Active Publication Date: 2021-06-18
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 sub

Method used

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  • Partial least square method-based pipeline corrosion prediction method under metro stray current
  • Partial least square method-based pipeline corrosion prediction method under metro stray current
  • Partial least square method-based pipeline corrosion prediction method under metro stray current

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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 solution 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...

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Abstract

The invention discloses a partial least square method-based pipeline corrosion prediction method under metro stray current. The method comprises the steps of 1, selecting a test point, and performing finite element simulation; 2, preprocessing data ; 3, obtaining a training sample; 4, selecting a first principal component pair; 5, carrying out regression of dependent variables and independent variables to principal components; 6, carrying out residual matrix replacement; 7, establishing a partial least square regression equation; 8, verifying cross validity; 9, removing redundant position variables, and selecting optimal sensor arrangement; and 10, testing the test sample. According to the method, the effective pipeline corrosion prediction current density is obtained through earth surface potential data obtained in the interval in combination with finite element simulation, the prediction regression equation is obtained according to the partial least square method, the corrosion condition of a pipeline is judged, the number of sensors is reduced, meanwhile, the prediction precision can be kept within the acceptable range, and the method has great practical significance for intuitively monitoring the corrosion condition of the pipeline and saving the cost.

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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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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