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Method and device for determining flatness of surface

A flatness and plane technology, applied in the field of data measurement, can solve problems such as low accuracy, and achieve the effect of improving detection accuracy, fast calculation speed, and eliminating potential errors

Inactive Publication Date: 2017-08-18
北京正木激光设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] A method and device for determining surface flatness provided by the embodiments of the present invention are used to solve the technical problem of low accuracy of existing flatness measurement methods

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  • Method and device for determining flatness of surface
  • Method and device for determining flatness of surface

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Embodiment Construction

[0053]The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0054] see figure 2 , the flow of a method for determining surface flatness provided by an embodiment of the present invention is as follows, specifically including steps 101-103:

[0055] Step 101: Acquire spatial position information of multiple collection points on the surface to be measured in sequence, and the spatial position information includes abscissa data, ordinate data and height data of the collection points.

[0056] In the embodiment of the present invention, the surface to be measured may specifically be a surface of the product to be measured. After the product to be tested is relatively fixed, the spatial position information of each collection poi...

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Abstract

The invention discloses a method and a device for determining the flatness of a surface. The method comprises the following steps: acquiring spatial position information of multiple collection points on a to-be-measured surface in turn, wherein the spatial position information includes horizontal coordinate data, longitudinal coordinate data and height data of the collection points; determining a datum plane, wherein the datum plane is a plane formed through fitting according to the spatial position information of the multiple collection points; and determining the height error between each collection point and the datum plane, and calculating the flatness of the to-be-measured surface according to the height error. As the datum plane matching the collection points most is determined through fitting, error generated when an actual plane is used as a datum plane is avoided, potential error caused by manual intervention is eliminated, and the precision of flatness detection is improved greatly. Moreover, the method can run automatically, improves the repeatability and reproducibility of detection, and is suitable for automatic production lines.

Description

technical field [0001] The invention relates to the technical field of data measurement, in particular to a method and device for determining surface flatness. Background technique [0002] Flatness has always been an important precision tolerance in the process of product production and assembly, and its precision detection has always been the top priority in the production process. Now with the advancement of technology in the consumer electronics industry, large-size display screens are becoming more and more popular with consumers. During the assembly process of this large-size glass panel, if the flatness of the connecting parts that match it is not accurate enough, it will directly This leads to the scrapping of the glass panel and increases the cost of the enterprise. For another example, most mobile phone casings now use aluminum integrated casings, which are directly processed by CNC (Computer numerical control, CNC machine tools), and the subsequent screens are di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/28
CPCG01B5/28
Inventor 王凯巩合具何宝东
Owner 北京正木激光设备有限公司
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