Train door positioning method and system based on linear array image variable proportion recovery

A linear array image and variable ratio technology, which is applied in image enhancement, image analysis, image data processing, etc., can solve the problems of insufficient positioning accuracy of train doors at stops, avoid inaccurate door position positioning, improve door positioning accuracy, The effect of high degree of automation

Active Publication Date: 2020-11-13
中国铁路成都局集团有限公司 +1
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  • Abstract
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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention proposes a train door positioning method based on linear array image variable scale recovery, aiming to solve the defect of insufficient positioning accuracy of the existing high-speed railway platform doors for train parking doors

Method used

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  • Train door positioning method and system based on linear array image variable proportion recovery
  • Train door positioning method and system based on linear array image variable proportion recovery
  • Train door positioning method and system based on linear array image variable proportion recovery

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Embodiment 1

[0042] Embodiment 1 provides a kind of train door positioning method based on linear array imaging and speed curve, such as figure 1 shown, including:

[0043] Step S100, the line-scan camera 10 set at a fixed position at the station end adopts a fixed line frequency to obtain the scanning image of the train entering the station; the line-scan camera 10 has been pre-calibrated: it scans at the fixed line frequency with a reference speed V ref Moving standard parts, the unit pixel distance in the formed linear image corresponds to the reference width of the world coordinate system W ref ;

[0044] Step S200, identifying the train number in the scanned image, and obtaining the door width of the current train from the car number-model database according to the train number W std1 ;

[0045] Step S300, identifying each door target in the scanned image, and recording the front horizontal pixel coordinates of each door in the image R1 ( i ) and the horizontal pixel coordinat...

Embodiment 2

[0060] Embodiment 2 provides a train door positioning system based on linear array image scaling recovery, the train door positioning system implements the train door positioning method described in Embodiment 1, including:

[0061] The line array camera is set at a fixed position at the station end, and is used to obtain the scanning image of the train entering the station with a fixed line frequency; the line array camera is pre-calibrated: it scans with the fixed line frequency at a reference speed V ref Moving standard parts, the unit pixel distance in the formed linear image corresponds to the reference width of the world coordinate system W ref ;

[0062] The distance measuring device is set at a fixed position at the exit end, and is used to measure the position of the front of the train after it has stopped;

[0063] The initial width recognition module of the car door is used to identify each car door target in the scanned image, and record the horizontal pixel coo...

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Abstract

The invention discloses a train door positioning method and system based on linear array image variable proportion recovery. The method comprises the steps: enabling a linear array camera arranged atthe fixed position of a pull-in end to obtain a train pull-in scanning image through fixed line frequency; identifying the train number in the scanning image, and obtaining the train door width of thecurrent train from a train number-train type database according to the train number; identifying each vehicle door target in the scanning image, and recording a vehicle door front side horizontal pixel coordinate and a vehicle door rear side horizontal pixel coordinate of each vehicle door in the image; calculating a first local distortion coefficient of each train door, and fitting an overall distortion coefficient of the train according to the first local distortion coefficient; calculating the actual width of each vehicle door and the distance from the front side or the rear side of each vehicle door to the vehicle head according to the overall distortion coefficient; and obtaining the train head position after the train stops stably, and outputting the positioning result of each traindoor according to the relative distance between each train door and the train head. The invention further provides a train door positioning system based on linear array image variable proportion recovery.

Description

technical field [0001] The invention belongs to the field of high-speed railway / intercity railway platform doors, in particular to a train door positioning method and system based on linear array imaging. Background technique [0002] The rapid development of high-speed railways has made people's travel more convenient, and the safety of its platforms has attracted widespread attention in recent years. As an isolation barrier separating people and vehicles, platform doors can effectively guarantee the safety of trains, passengers and station staff. Different from the subway, the screen door of the high-speed rail station needs to meet the parking requirements of different types of arriving trains. Accurate positioning of the parking door position of various trains is the basis for adaptive control of the high-speed rail platform door. [0003] The known existing scheme is: based on the train operation diagram to obtain the vehicle type information to be entered, such as the...

Claims

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Application Information

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IPC IPC(8): G06T7/73G06T5/00G06N3/04
CPCG06T7/73G06N3/045G06T5/80
Inventor 占栋张志豪李想徐波向文剑张楠曹伟周蕾黄瀚韬钟尉
Owner 中国铁路成都局集团有限公司
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