Steel rail longitudinal calibration method and device
A calibration method and rail technology, applied in measuring devices, optical devices, instruments, etc., can solve problems such as inaccurate calibration methods, inaccurate rail profile measurement results, and systematic errors, so as to improve the accuracy of calibration results and improve the rail profile. The effect of measurement accuracy
Active Publication Date: 2021-04-20
RAILWAY INFRASTRUCTURE TESTING RES INST CHINA ACAD OF RAILWAY SCI +2
View PDF7 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The existing calibration method of the rail profile measurement system is to perform calibration processing by obtaining the internal and external parameters of the camera and the laser plane parameters. This calibration method is not accurate, which makes the rail profile measurement system have certain systematic errors during calibration, which leads to Inaccurate
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0027] Line structured light profile measurement technology is based on the principle of triangulation, which can obtain the profile information of the measured object in real time. It has the characteristics of high speed, high precision and non-contact, and is the mainstream method of dynamic detection of rail profile. figure 1 It is the principle diagram of line structured light rail profile measurement. There is a set of laser camera components consisting of cameras, lenses and line lasers on the left and right sides of the rail. The laser planes of the two sets of...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a steel rail longitudinal calibration method and device. The method comprises the following steps of: acquiring a plurality of images under different postures when a plane target is tightly attached to the surface of a steel rail; arranging a plurality of marking points which are uniformly distributed on the plane target; determining direction parameters of the steel rail in the longitudinal direction in a world coordinate system according to the plurality of images of the plane target in different postures when the plane target clings to the surface of the steel rail; wherein the direction parameters of the steel rail in the longitudinal direction in the world coordinate system are used for determining the perpendicularity of the steel rail in the longitudinal direction and the laser plane together with the plane parameters of the laser planes of the lasers arranged on the left and right sides of the steel rail in the world coordinate system. The method can acquire the direction parameters of the steel rail in the world coordinate system in the longitudinal direction, and can be used for evaluating the perpendicularity of the steel rail in the longitudinal direction and the laser plane in combination with the calibration result of the laser plane, thereby ensuring that the laser planes on two sides are absolutely perpendicular to the steel rail in system calibration, improving the calibration result precision and further improving the steel rail profile measurement precision.
Description
technical field [0001] The invention relates to the technical field of rail detection, in particular to a rail longitudinal calibration method and device. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] Rail detection plays an important role in the railway field. Only by keeping the rails in good condition can the comfort and safety of trains running at high speed be better guaranteed. Rail profile detection is the key and difficult point of track detection. In order to ensure the accuracy of rail profile detection, it is usually necessary to calibrate the rail profile measurement system with a calibration method, and to ensure that the laser plane is perpendicular to the longitudinal direction of the rail during system calibration. The existing calibration method of the rai...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
Inventor 方玥王乐王胜春王昊黎国清任盛伟王凡
Owner RAILWAY INFRASTRUCTURE TESTING RES INST CHINA ACAD OF RAILWAY SCI