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Novel cylindrical three-dimensional reconstruction method and system

A three-dimensional reconstruction and cylinder technology, applied to computational models, biological models, details involving processing steps, etc., can solve problems such as accuracy needs to be improved, errors, etc.

Active Publication Date: 2020-12-18
CHANGCHUN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current non-contact measurement methods still need to be improved in accuracy, and there are also errors.

Method used

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  • Novel cylindrical three-dimensional reconstruction method and system
  • Novel cylindrical three-dimensional reconstruction method and system

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Embodiment 1

[0123] The embodiment of the present invention provides a novel cylinder three-dimensional reconstruction method, referring to figure 1 ,include:

[0124] S100. Obtain the dynamic scanning data of the centerline laser displacement sensor of the measuring mechanism on the left and right journals of the wheel set axle;

[0125] S200. The scanned data is three-dimensional point cloud data, and an initial calculation is performed on the three-dimensional point cloud data to generate initial fitting parameters of the axle journal;

[0126] S300. Using the particle swarm optimization algorithm to iteratively optimize the initial fitting parameters to obtain final fitting parameters.

[0127] In this embodiment, the measurement mechanism dynamically scans and detects the journal of the wheel set axle, obtains the surface data of the wheel set journal, obtains relatively accurate initial fitting parameters through three-dimensional reconstruction of the wheel set journal, and uses pa...

Embodiment 2

[0238] The embodiment of the present invention also provides a novel cylinder three-dimensional reconstruction system, referring to Figure 6 , including a measuring mechanism and a computing terminal 9;

[0239] Among them, the measuring mechanism is placed on one or both ends of the wheel set to be tested through the support frame 4; it is used to dynamically scan the left and right journals of the wheel set axle;

[0240] For example, the measuring mechanism is communicated with the computing terminal 9 through the router 8; during actual measurement, the supporting frame 4 of the measuring mechanism is fixed on one or both ends of the wheel set to be tested, and the linear displacement platform 1 drives the linear laser displacement sensor 2 of the wheel set to be tested. Dynamically scan the journal at one or both ends, obtain initial fitting parameters through the three-dimensional reconstruction method of the above embodiment, and then iteratively obtain the optimal fit...

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Abstract

The invention discloses a novel cylindrical three-dimensional reconstruction method and system. The method comprises the following steps: acquiring dynamic scanning data of a line laser displacement sensor in a measuring mechanism on left and right journals of a wheel set axle, wherein the scanning data is three-dimensional point cloud data; performing initial calculation on the three-dimensionalpoint cloud data, and generating initial fitting parameters of the axle journal; and performing iterative optimization on the initial fitting parameter by using a particle swarm algorithm to obtain afinal fitting parameter. According to the method, during subsequent particle swarm algorithm iteration, because the precision of primary iteration is improved, the iteration time is reduced, and the problem that the particle swarm algorithm falls into local optimum is avoided, so that an optimal fitting result is obtained; the manufacturing precision and the assembling precision of the wheel set shaft neck are improved, and the running safety of a high-speed rail train and the riding comfort of passengers are also improved.

Description

technical field [0001] The invention relates to the technical field of machine vision, in particular to a novel cylinder three-dimensional reconstruction method and system. Background technique [0002] At present, China's railways, especially China's high-speed rail, have achieved rapid development and become a shining "China business card". The requirements for the quality of high-speed rail components are getting higher and higher. The train wheel set is an important running part of the high-speed train, and its manufacturing precision and assembly precision directly affect the safety of the high-speed train operation and the comfort of passengers. However, the running speed of high-speed trains is getting faster and faster, which puts forward higher requirements on the manufacturing quality and manufacturing size of the train wheel set, especially the size of the wheel set journal. [0003] Therefore, whether in the assembly process or in the unloading process, the meas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06N3/00G01B11/00G01B11/08
CPCG06T17/00G06N3/006G01B11/002G01B11/08G06T2200/08
Inventor 张爽陈儒刘孝峰韩伟峰侯岱双王善刚王华
Owner CHANGCHUN INST OF TECH
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