Infrared image-based contact network geometrical parameter detection method and system

An infrared image and geometric parameter technology, which is applied in image data processing, image analysis, measurement devices, etc., can solve the problems of too much interference data, low measurement accuracy, and low measurement frequency, and achieves high detection accuracy, simple equipment structure, The effect of a small amount of calculation

Active Publication Date: 2017-08-04
CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
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Problems solved by technology

[0009] Although the laser scanning radar equipment is simple, there are problems such as low measurement accuracy, low measurement frequency, and more interference data.

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  • Infrared image-based contact network geometrical parameter detection method and system
  • Infrared image-based contact network geometrical parameter detection method and system
  • Infrared image-based contact network geometrical parameter detection method and system

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] As mentioned above, when using a CCD line scan camera to measure the geometric parameters of the contact line, the equipment involved is complex in structure and the system cost is high; Data lead to low measurement accuracy, and the measurement frequency of this scheme is low. In the embodiment of the present invention, infrared imaging and video analysis technologies are selected to measure the dynamic geometric parameters of the catenary. Install an...

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Abstract

The invention provides an infrared image-based contact network geometrical parameter detection method and system. The method includes the following steps: arranging a thermal infrared imager on the top of an inspection van to collect an infrared image under a pantograph-catenary running state; performing gray scale-based template matching on the infrared image to obtain intersection point coordinates of a pantograph slide plate and a line of contact in the infrared image; and according to calibration of transformation from infrared image coordinates to spatial geometrical coordinates, performing coordinate transformation on the intersection point coordinates of the pantograph slide plate and the line of contact in the infrared image, thereby obtaining the height and the stagger value of the line of contact. The method is relatively high in detection precision, is not influenced by original image quality, and equipment that is used is simple in structure and relatively low in cost.

Description

technical field [0001] The invention relates to the technical field of electrified railway catenary detection, in particular to a method and system for detecting geometric parameters of catenary based on infrared images. Background technique [0002] As a traditional catenary dynamic measurement project, there are currently multiple measurement schemes and applications for geometric parameters such as the height and pull-out value of the catenary at home and abroad, such as triangulation, laser radar measurement and other methods. The following is a description of each measurement scheme Briefly analyze. [0003] The non-contact detection system represented by DB in Germany adopts the triangulation principle to measure the contact line height, pull-out value, wear and other parameters through multiple line scan cameras. By installing four spotlights on the optical detection beam ( figure 1 not shown in ) and four CCD line scan cameras (such as figure 1 Shown in the middle...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01N21/95G06T7/00
CPCG01B11/002G01N21/95G06T7/0004
Inventor 王燕国时菁李海浪薛宪堂肖克新李进财傅强
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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