Plane inclination error evaluation method based on minimum zone

A technology of minimum area and error evaluation, applied in measurement devices, instruments, etc., can solve the problems of poor calculation stability, low calculation efficiency, and difficult to achieve calculation results.

Active Publication Date: 2013-09-11
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

Due to the shortcomings of these methods, such as poor calculation stability, low calculation efficiency, limited number of sampling points, and difficulty in achieving accurate solutions for calculation results, it is difficult to apply the minimum area method in actual detection.

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  • Plane inclination error evaluation method based on minimum zone
  • Plane inclination error evaluation method based on minimum zone
  • Plane inclination error evaluation method based on minimum zone

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Embodiment Construction

[0024] A plane inclination error evaluation method based on the minimum area, as shown in the attached figure 1 shown, including the following steps:

[0025] Step 1: Place the measured part on the measurement platform, and obtain the measuring point coordinates of the datum feature and the measured plane in the rectangular coordinate system of the measurement space.

[0026] Step 2: Determine whether the datum feature is a plane or a straight line;

[0027] If the datum feature is a plane, apply the minimum area method to fit the datum plane to obtain the normal vector of the datum plane; if the datum feature is a straight line, apply the minimum area method to fit the datum line to obtain the direction vector of the datum line; The normal vector of the datum plane and the direction vector of the datum straight line are collectively recorded as the datum vector .

[0028] Step 3: Randomly give the initial normal vector of the measured plane , and guarantee and into...

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Abstract

A plane inclination error evaluation method based on a minimum zone comprises the steps of firstly measuring and obtaining coordinates of measured points on a measured plane, then providing initial parameters of the measured plane, inquiring measured points of measured features in contact with an error tolerance zone, confirming the rotation direction of the tolerance zone according to the coordinates of contact points, calculating change amount by means of an auxiliary cone making method to obtain parameters of the changed tolerance zone, inquiring the contact points, calculating the change amount, sequentially performing iterative computation till criterions are met, and outputting a plane inclination error and a plane parameter optimal value. By means of the method, the plane inclination error and a plane parameter optimal value meeting the minimum zone can be accurately calculated.

Description

technical field [0001] The invention relates to a plane inclination error evaluation method based on the minimum area, which belongs to the field of precision measurement and computer application, can be used for the qualification detection of the plane inclination index in geometric products under various circumstances, and is used for the processing process and processing technology. Improve guidance. Background technique [0002] Plane is one of the most common geometric elements in mechanical parts, and the inclination accuracy of the plane relative to the reference has an important impact on the quality, performance and assembly of the product. According to the provisions of the international standard ISO / 1101, the minimum condition, that is, the minimum area, should be met when calculating the part error. Under the same hardware detection conditions, the detection accuracy of the detection equipment can be improved by applying the minimum area to calculate the part er...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/22
Inventor 钟艳茹陈磊磊宫文峰孙颖孙颖超
Owner GUILIN UNIV OF ELECTRONIC TECH
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