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Three-D connection rod curve matching rate detection method

A technology of three-dimensional space and detection method, which is applied in the direction of measuring devices, instruments, etc., can solve problems such as the inability to apply three-dimensional connecting rod curves, achieve the effects of reducing workload, speeding up design, and solving matching problems

Inactive Publication Date: 2007-10-24
SHANGHAI JIAO TONG UNIV
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, its disadvantage is that the fast Fourier transform used in this method can only be applied to two-dimensional data, so it can only detect the matching degree of the planar connecting rod curve, and cannot be applied to the three-dimensional connecting rod curve

Method used

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  • Three-D connection rod curve matching rate detection method
  • Three-D connection rod curve matching rate detection method
  • Three-D connection rod curve matching rate detection method

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Embodiment Construction

[0032] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0033] As shown in Figure 1, the implementation of this embodiment is:

[0034] 1) The connecting rod curve is approximately represented by a set of coordinate point sequences, and the most original coordinate point sequence (denoted as SCO[n]) is obtained through the ADAMS simulation software. That is, the connecting rod curves are first normalized according to the arc length, that is, the arc lengths of all the connecting rod curves to be compared are scaled up or down to the same length L (dimensionless), and the coordinates of each point in SCO[n] Also make corresponding chang...

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Abstract

A check method of three-dimension spatial connecting rod curvature match degree comprises following steps that standardizing an object connecting rod curvature data, referring to the standard curvature, using wringing number and distance of sub section couple to divide all sub section couples into a plurality of equivalent classes, calculating out the rigid conversion between the sub section couples of different curvatures in each equivalent class, to find maximum match sub section couple to realize local match of curvature, cluster analyzing all rigid conversions, using the maximum cluster as the best match of connecting rod curvature, to obtain maximum rigid conversion, match degree and match error, to display match effect. The invention can effectively resolve the three-dimension spatial connecting rod curvature match problem.

Description

technical field [0001] The invention relates to a detection method in the technical field of mechanical design, in particular to a detection method for the matching degree of connecting rod curves in three-dimensional space. Background technique [0002] Many problems in nature can be abstracted as the problem of trajectory curves. These trajectory curves can be two-dimensional, three-dimensional or higher-dimensional. For example, in the recognition of objects in computer vision, objects need to be abstracted into two-dimensional or three-dimensional contour lines; The analysis of protein properties in molecular biology requires the abstraction of protein molecular chains into three-dimensional spatial fold lines; when designing mechanisms, we often face the problem of how to realize the specific motion trajectory proposed by the user, that is, how to make the connecting rod curve of the designed mechanism, It is closer to the trajectory path required by the user. In addit...

Claims

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Application Information

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IPC IPC(8): G01B21/00G01B21/04
Inventor 冯海涛杭鲁滨崔俊文
Owner SHANGHAI JIAO TONG UNIV
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