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Method for measuring connectivity of valley based on three-dimensional surface topography instrument

A surface topography, three-dimensional surface technology, applied in the direction of measuring devices, instruments, etc., can solve the problem of no valley, etc., and achieve the effect of simple measurement method and small amount of calculation

Inactive Publication Date: 2013-01-09
HEFEI UNIV OF TECH
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Problems solved by technology

However, these parameters describing the surface topography lack a close relationship with the surface function. In the microstructure of the three-dimensional surface topography, the part between the peaks is called a valley, and the connectivity between the valleys directly affects the lubricating oil between the surfaces. Therefore, it has a great influence on the lubrication and sealing performance of the part surface, and there is no connectivity parameter and measurement of the valley in the current international surface topography standards and existing surface topography measuring instruments. method

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  • Method for measuring connectivity of valley based on three-dimensional surface topography instrument
  • Method for measuring connectivity of valley based on three-dimensional surface topography instrument
  • Method for measuring connectivity of valley based on three-dimensional surface topography instrument

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Embodiment Construction

[0031] In this embodiment, the valley connectivity measurement method based on the three-dimensional surface topography instrument is carried out as follows:

[0032] 1. Use the three-dimensional surface topography instrument to measure the surface topography of the tested piece, and obtain the height data of each measured point on the surface topography of the tested piece under the set sampling interval;

[0033] 2. From the height data of each measured point on the surface topography of the tested piece, the support ratio curve of the surface topography of the tested piece is obtained, and the section S and section height corresponding to the surface support ratio of 80% are determined from the support ratio curve value, because the lubricating oil mainly exists in the liquid storage center area with a surface support rate greater than 5% and less than 80% and the liquid storage valley area with a surface support rate greater than 80% on the surface morphology of the part, a...

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Abstract

The invention discloses a method for measuring the connectivity of a valley based on a three-dimensional surface topography instrument, and the method provided by the invention is characterized by comprising the following steps; firstly, determining a cross section corresponding to the support rate 80% to serve as the connectivity evaluation reference plane of the valley by utilizing a surface support rate curve which is obtained through the surface topography height data of a measured piece wherein the surface topography height data is measured by the three-dimensional surface topography instrument; solving the binary image of the connectivity evaluation reference plane; then, obtaining each cross-section empty region on the binary image of the evaluation reference plane by utilizing a marker algorithm; solving the size of each cross-section empty region and the minimum width and length characteristics of the channel in the cross-section empty region by utilizing unexpanded form operation and condition expansion operation; solving the connectivity of each cross-section empty region by utilizing connectivity functions; and finally, solving the connectivity parameters of the valleyof the surface topography of the measured piece by utilizing a weighting method. By utilizing the method disclosed by the invention, the connectivity of the valley of the surface topography of the piece is ensured to have a certain amount of expression.

Description

technical field [0001] The present invention relates to the measurement of surface topography, especially the connectivity measurement of the valleys of the surface topography. Background technique [0002] In the latest international standard ISO 25178 for surface topography, five types of parameters are specified for the measurement of surface topography, namely, height parameters, spatial parameters, mixing parameters, functional parameters, and parameters related to surface segmentation. The parameters related to the statistical distribution of values, the spatial parameters reflect the periodicity and directionality of the surface topography in space, the mixing parameters reflect the spatial shape of the surface topography, and the functional parameters include the surface support rate at a certain height obtained from the surface support rate curve and volume parameters, the parameters related to surface segmentation refer to the parameters obtained by the basic textu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/20
Inventor 刘小君刘焜王伟王静胡兆稳
Owner HEFEI UNIV OF TECH
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