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Automatic measurement method for railway on basis of point cloud data

A point cloud data, automatic measurement technology, applied in the direction of measuring devices, image data processing, instruments, etc., can solve the problems of local distortion, 3D point cloud data noise points, etc., to achieve good robustness, high degree of automation, and accurate measurement results Robust and Reliable Effects

Active Publication Date: 2014-12-24
XIAMEN UNIV
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Problems solved by technology

[0003] However, due to the influence of factors such as the measurement environment, the shape of the measured object, and the limitations of laser characteristics, 3D point cloud data usually produces noise points and local distortions, and railway measurement based on point cloud data needs to be carried out without loss of accuracy. Quickly extract rails and perform rail measurements

Method used

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  • Automatic measurement method for railway on basis of point cloud data
  • Automatic measurement method for railway on basis of point cloud data
  • Automatic measurement method for railway on basis of point cloud data

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Embodiment

[0039] Before describing this embodiment in detail, it should be pointed out that the automatic railway measurement method based on point cloud data provided in this embodiment is an automatic method for measuring railways in a three-dimensional point cloud. The track length involved in the railway extraction and measurement process needs to be defined and selected by the user. For specific parameter settings, please refer to the railway industry standards of the People's Republic of China.

[0040] see figure 1 , the present invention provides a kind of railway automatic measuring method based on point cloud data, comprises the following steps:

[0041] S1, preprocessing

[0042] Estimate the approximate area where the railway is located in the original point cloud data, and obtain approximate railway point cloud data (refer to figure 2 shown). This step is specifically implemented through the following steps:

[0043] S11, importing track lines or manually drawing the r...

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Abstract

The invention discloses an automatic measurement method for a railway on the basis of point cloud data. The automatic measurement method comprises the following steps of: S1, pre-treating; S2, extracting a rail track; S3, fitting the side surface of the track; S4, acquiring a measurement point; S5, calculating a measurement value; S6, verifying and correcting. According to the automatic measurement method disclosed by the invention, the measurement working for the railway is automatic and accurate by adopting a computation geometry fitting method and combining with laser point cloud data, thus avoiding the high workload needed by field surveying and mapping.

Description

technical field [0001] The invention relates to a point cloud data processing method and the field of railway surveying and mapping, in particular to a method for automatically measuring railways based on three-dimensional point cloud data. Background technique [0002] Railway surveying is an important basis for verifying the quality of railway construction and whether the railway meets operating standards. For traditional railway surveys, manual advance surveys are time-consuming and costly. With the rapid development of laser scanning technology, high-precision point cloud data is widely used in surveying and surveying. [0003] However, due to the influence of factors such as the measurement environment, the shape of the measured object, and the limitations of laser characteristics, 3D point cloud data usually produces noise points and local distortions, and railway measurement based on point cloud data needs to be carried out without loss of accuracy. Quickly extract ...

Claims

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Application Information

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IPC IPC(8): G01B21/00G06T7/00G06T17/00
Inventor 王程程骏林阳斌杨文韬李军
Owner XIAMEN UNIV
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