One-dimensional non-uniform gear morphology point cloud precise registration method

An accurate registration and non-uniform technology, applied in the field of data processing, can solve the problems of large registration errors of discrete sequences

Active Publication Date: 2014-02-26
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0004] In order to solve the problem that the existing ICP registration algorithm is used to register the corresponding points of the measured gear sequence and the virtual gear sequence, there is a problem that the discrete sequence registration error is relatively large due to the different sampling intervals of the corresponding points, and provides a one-dimensional Accurate registration method of point cloud of non-uniform gear topography

Method used

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  • One-dimensional non-uniform gear morphology point cloud precise registration method
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  • One-dimensional non-uniform gear morphology point cloud precise registration method

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Embodiment Construction

[0026] to combine Figure 1 to Figure 4 In this embodiment, the precise registration method of one-dimensional non-uniform gear shape point cloud is realized by the following steps:

[0027] Step 1: Quantity registration between the measured gear sequence and the virtual gear sequence;

[0028] Assuming that the total sampling number N of a certain laser scanning involute straight internal gear is 2519, the sampling interval Δt(n) is non-uniform, and the sampling number n is used as an independent variable to obtain the measured gear sequence x(n), combined with figure 2 ;

[0029] It is known that the number of gear teeth z is 85, the modulus m is 3.27742, the pressure angle α at the indexing circle is 25°, and the addendum height coefficient h a * is 0.8, head clearance coefficient c * is 0.3. According to the gear design parameters, the gear equation is generated as follows:

[0030] Q ( t ) = ...

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Abstract

The invention discloses a one-dimensional non-uniform gear morphology point cloud precise registration method, and relates to the field of data processing. The one-dimensional non-uniform gear morphology point cloud precise registration method is used for solving the problem that a discrete sequence registration error is large because sample intervals of corresponding points are different when an ICP registration algorithm is adopted to carry out registration on the corresponding points of an actually-measured gear sequence and a virtual gear sequence. The method comprises the steps that first, quantity registration is carried out on the actually-measured gear sequence and the virtual gear sequence; second, initial phase registration is carried out on the actually-measured sequence and the virtual gear sequence; third, corresponding-point registration is carried out on the actually-measured sequence and the virtual gear sequence. The one-dimensional non-uniform gear morphology point cloud precise registration method is based on the actually-measured gear sequence, regenerates virtual gear sequence with the same sample intervals of the corresponding points as the actually-measured gear sequence, and further improves the accuracy of the gear one-dimensional non-uniform point cloud data registration. The one-dimensional non-uniform gear morphology point cloud precise registration method can achieve one-dimensional non-uniform gear morphology point cloud precise registration, and is high in registration accuracy, simple to calculate and reliable.

Description

technical field [0001] The invention relates to a method for precise registration of point cloud of one-dimensional non-uniform gear shape in reverse engineering of gear shape, which can realize precise registration of point cloud of one-dimensional non-uniform shape of gear, and belongs to the field of data processing. Background technique [0002] Gear deviation analysis is of great significance for gear manufacturing and improving transmission system performance. The traditional contact gear deviation measurement method has slow measurement speed and low data sampling rate. The measured gear sequence is obtained by laser scanning the gear, and the difference between the measured gear sequence and the virtual gear sequence is calculated to obtain the gear deviation, which avoids the above problems. Here, the measured gear sequence refers to the one-dimensional point cloud data of gear shape obtained by continuous laser scanning of the gear, and the virtual gear sequence re...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 苏成志王言敬窦艳红孙炜强代悄王世华白宇
Owner CHANGCHUN UNIV OF SCI & TECH
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