Method and device for detecting geometric parameters of catenary
A technology of geometric parameters and detection methods, which is applied in the detection field, can solve the problems of low mobile measurement accuracy, large amount of single-frame image data, and low measurement speed, and achieve reliable technical means, fast line scanning speed, and accurate detection results.
Active Publication Date: 2017-08-25
CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
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Problems solved by technology
The existing laser scanning ranging technology has disadvantages such as low measurement speed, low mobile measurement accuracy, and is easily affected by the environment and the surface reflectivity of the measured material, which cannot meet the high-speed, high-resolution and all-weather measurement requirements.
However, the existing visual measurement technology using area scanning cameras is restricted by many factors such as two-dimensional image resolution, large amount of single-frame image data, image processing speed, and easy occurrence of backlighting. It is also difficult to meet high-speed, high-resolution and all-weather requirements measurement requirements
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[0064] 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.
[0065] The invention provides a method for detecting the geometric parameters of catenary, such as figure 1 As shown, the method includes:
[0066] Step S101, obtaining one-dimensional catenary images captured by at least two line scan cameras fixed on the top of the vehicle;
[0067] Step S102, performing grayscale processing on the one-dimensional catenary image to generate a relationship diagram between grayscale values and pixel coordinates;
[0068] S...
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The invention provides a catenary geometric parameter detection method and device. The method includes: acquiring a one-dimensional catenary image taken by at least two line scan cameras fixed on the vehicle top; performing grayscale processing on the one-dimensional catenary image to generate gray According to the gray value and pixel coordinate relationship diagram, determine the imaging position of the contact line of the catenary in the image; determine the imaging angle of the contact line in the corresponding camera according to the imaging position of the contact line; according to the imaging angle and Position data of at least two line scan cameras relative to the roof of the vehicle determine catenary geometry. The catenary geometric parameter detection of the present invention utilizes the image collected by the line scan camera to detect the geometric parameter, the line scanning speed is fast, the detection result is accurate, the detection efficiency is high, and the maintenance skylight time is not occupied, which provides for the dynamic and static geometric parameter measurement and evaluation of the catenary A reliable technical means is provided, which improves the work efficiency of inspection and maintenance of power supply equipment.
Description
technical field [0001] The invention relates to detection technology, in particular to a method and device for detecting geometric parameters of catenary. Background technique [0002] With the continuous expansion and improvement of the scale of railway transportation network and urban rail transit network, the catenary maintenance tasks of relevant operation and maintenance departments of railway and urban rail transit are also becoming increasingly heavy. In order to effectively improve the railway transportation capacity and transportation efficiency, the railway operation and maintenance department must effectively improve the quality and efficiency of the maintenance operation while controlling the maintenance time. This requires the railway operation and maintenance department to adopt more advanced detection technology and more scientific analysis methods. Improve the efficiency of daily maintenance from the aspects of detection technology and detection accuracy, and...
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IPC IPC(8): G01B11/00G01B11/02
Inventor 周威孙忠国任盛伟张文轩汪海瑛
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD