Flatness detection method

A detection method and flatness technology, applied to measuring devices, instruments, optical devices, etc., can solve the problems of complex structure of detection devices and large detection errors

Inactive Publication Date: 2017-03-15
SUZHOU YIMEIDE TECH CO LTD
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Problems solved by technology

[0003] The invention provides a flatness detection method to solve the problem of c

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Embodiment Construction

[0020] The present invention is described in detail below in conjunction with accompanying drawing:

[0021] Such as Figure 1-2 As shown, a flatness detection method of the present invention can carry out flatness detection for all planes, comprising the following steps:

[0022] S1: Select a number of measurement points 11 from the plane 1 to be measured, and detect the three-dimensional coordinates of the selected measurement points 11 through the probe, including X, Y, and Z directions, where Z represents the height; figure 1 As shown, first a three-dimensional coordinate system is established according to the plane 1 to be measured, wherein the X and Y directions are parallel to the plane 1 to be measured, the direction Z is perpendicular to the plane 1 to be measured, and the positive direction is upward. In this embodiment, the measuring points 11 are evenly distributed on the plane 1 to be measured, figure 1 Among them, the number of measuring points 11 is 64, which ...

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Abstract

The invention discloses a flatness detection method comprising the following steps: first, selecting a plurality of measurement points from a plane to be detected, and detecting the 3D coordinates of the selected measurement points through a probe; fitting out a plane and a surface about the heights of the measurement points based on the 3D coordinates of the measurement points; gridding the surface obtained by fitting, and getting the intersections of the surface and a grid and the coordinates thereof; and calculating the Z-direction distance between each intersection and the obtained plane, and taking the maximum value as the flatness value of the plane to be detected. According to the method, the 3D coordinates of the measurement points are detected, the obtained 3D coordinates of the measurement points are fitted by use of a least square method to obtain a plane, a surface is fitted using matlab and is gridded, the Z-direction distance from the intersection of the surface and the grid to the plane is calculated, and finally, the flatness of the plane to be detected is obtained. Detection error caused by a limited number of measurement points is avoided, and the accuracy of measurement is improved.

Description

technical field [0001] The invention relates to a flatness detection method. Background technique [0002] With the development of science and technology, smart phones have developed by leaps and bounds. People's life and work are becoming more and more inseparable from smart phones. As one of the most important components in smart phones, the flatness of the screen surface in the production process of smart phone screen The requirements are getting higher and higher, and the flatness of the mobile phone screen greatly affects the performance and quality of the mobile phone. The existing flatness detection device has a complex structure and large detection error, which fails to meet the needs of actual production. Contents of the invention [0003] The invention provides a flatness detection method to solve the problems in the prior art that the structure of the detection device is complex and the detection error is large. [0004] In order to solve the above technical p...

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Application Information

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IPC IPC(8): G01B11/30
CPCG01B11/30
Inventor 靳登科汪建鹿呈志
Owner SUZHOU YIMEIDE TECH CO LTD
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