Rapid calculating method for ballastless track plate based on least square fitting

A ballastless track and least squares technology, applied in the field of fast calculation of ballastless track slabs based on least squares fitting, can solve the problems of slow scanning speed, low calculation accuracy, long data processing time, etc., to reduce modeling time, the effect of shortening the calculation time

Inactive Publication Date: 2019-04-05
XIAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0007] The purpose of the present invention is to provide a fast calculation method for ballastless track slabs based on least square fitting, which can solve the existing problems of slow scanning speed, low calculation accuracy and long data processing time

Method used

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  • Rapid calculating method for ballastless track plate based on least square fitting
  • Rapid calculating method for ballastless track plate based on least square fitting
  • Rapid calculating method for ballastless track plate based on least square fitting

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Embodiment

[0037] Based on the least squares method, using a laser scanner to collect such as figure 1 According to the external dimension data of each rail platform of the track slab, find the special position points of the track slab contour line, process the contour data points in segments, and use the least square method to fit, and calculate according to the fitting equation figure 2 Marked size information α, β, γ, d2, d3, where: α: the angle between AB and BC, the angle between the left side of the rail platform and the surface of the rail, β: the angle between DC and BC, the right side of the rail platform The angle between the side and the bearing surface, γ: the angle between the bearing surface and the horizontal plane, corresponding to the calculation of the slope of the bearing surface, d2: the distance between the jaws, d3: the hole distance, respectively corresponding to the outer dimensions of the board (the rail platform The included angle with the rail surface, the slo...

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Abstract

The invention discloses a rapid calculating method for a ballastless track plate based on least square fitting. The rapid calculating method comprises the following steps of: step 1, performing non-contact rapid scanning on the surface topography of the ballastless track plate by utilizing a laser sensing head to obtain the external dimension of the ballastless track plate; step 2, processing datapoints acquired by a laser scanner to find special position points; step 3, segmenting a surface contour line by utilizing the special position points and determining a data interval of each segment;and step 4, performing data fitting and calculating contour information according to a fitting equation. The rapid calculating method adopts a least square method to perform extraction and analysis of feature points on the data which is acquired by non-contact scanning the contour of the track plate with the laser sensing head; the rapid calculating method avoids modeling the contour of the wholeballastless track plate using point cloud data, and greatly shortens the modeling time.

Description

technical field [0001] The invention belongs to the technical field of fast measurement of ballastless track slabs, and in particular relates to a fast calculation method for ballastless track slabs based on least square fitting. Background technique [0002] With the development of high-speed rail, subway and rail transit technology, CRTSⅢ type ballastless track pretensioned concrete track slab is more and more widely used, and its manufacturing quality and precision requirements are also greatly improved. CRTSⅢ slab ballastless track pretensioned concrete track slab is made of concrete and other materials poured in a predetermined mold. At present, the most common track slab has 18 or 16 concrete rail bearing platforms, and its size is about 6m× 3m. Since the high-speed rail or subway is installed on the rail platform, there are high requirements on the profile of the rail platform and the flatness of the rail platform surface of the entire track slab. The structure of t...

Claims

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Application Information

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IPC IPC(8): G01B11/00G01B11/30G01B11/24
Inventor 李淑娟王嘉宾谷中豪杨轩董永亨李言赵智渊袁启龙
Owner XIAN UNIV OF TECH
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