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Method for evaluating straightness in given plane based on digital gauge

A straightness and baseline technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as low computational efficiency, complex model form, and inability to meet production needs.

Inactive Publication Date: 2019-11-15
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the calculation process of these methods, the form of the model is relatively complex and there is randomness, and corresponding methods are required to ensure the stability of the results. When the number of measurement points is large, the calculation efficiency is not high enough to meet the production needs.
[0004] In summary, there is still a lack of a fast, stable, simple and digital method for evaluating straightness in a given plane

Method used

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  • Method for evaluating straightness in given plane based on digital gauge
  • Method for evaluating straightness in given plane based on digital gauge
  • Method for evaluating straightness in given plane based on digital gauge

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Embodiment Construction

[0042] The following are specific embodiments of the present invention, and the solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

[0043] assessment_point_set{ Q i} The straightness error value in a given plane.

[0044] Step 1: get point set { Q i}as follows:

[0045]

[0046] After data processing, the assessment baseline coincides with the x-axis, and a state element set is established { t i} is as follows: the status element measured above the assessment baseline t i ’ ,Right now ;Evaluate the status element of the measured point below the baseline t i ’’ ,Right now ;

[0047]

[0048] build-boundary-element-set { b i}as follows:

[0049] { b i}=[1,1,1,1,1,1,1,1,1,1] T .

[0050] After step 1, proceed to step 2.

[0051] Step 2: Build feature row vector set { A i}, to evaluate the measured points above the baseline Q i The corr...

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Abstract

The invention belongs to the field of precision metering and computer application and discloses a method for evaluating a part by combining an entity gauge with measurement data in a mathematical model form, and relates to a quick, stable, simple-form and digital method for evaluating straightness in a given plane, which comprises the following steps of: step 1, acquiring a measurement point set,and establishing a boundary element set and a state element set according to the measurement point set; step 2, establishing a feature row vector set according to the measuring point set and the corresponding normal vector; step 3, adding a key point; step 4, establishing an analysis matrix and an analysis column vector; step 5, rank analysis is performed on the analysis matrix and the augmented analysis matrix so as to determine whether optimization continues to be performed, key points are eliminated or a program is terminated; step 6, calculating an optimization direction; step 7, solving anew key point by using a chasing problem, performing optimization step calculation, updating according to the formula in the step 1, and entering the next cycle; or entering the next cycle accordingto the step 4; and step 8, terminating the program and obtaining an optimal value.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and relates to a fast, stable, simple and digital method for evaluating straightness in a given plane, which can be used for evaluating the straightness error in a given plane of a guide rail surface in a numerically controlled machine tool. And provide guidance for the improvement of parts processing and processing technology. Background technique [0002] Dimensional error and shape error (abbreviation of shape error and position error) directly affect product quality, assembly and service life. It is of great significance to quickly and accurately calculate part error. According to the national standard GB / T 11336-2004 and the ISO standard, the definition and judgment method of straightness in any direction is given, and the evaluation of the straightness error of parts in any direction needs to meet the minimum area condition to obtain better evaluation and verifi...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 刘廷伟黄美发唐哲敏
Owner GUILIN UNIV OF ELECTRONIC TECH
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