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Stable, quick, and simple-mode method for evaluating minimum excircle diameter

A circumscribed circle, the smallest technology, applied in the direction of measuring devices, instruments, etc., can solve the problem of initial value sensitivity

Inactive Publication Date: 2018-07-06
唐哲敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is very sensitive to the initial value and cannot always complete the task of evaluating the minimum circumscribed circle diameter stably
[0008] In summary, there is still a lack of a stable, fast, and simple method for evaluating the diameter of the smallest circumscribed circle

Method used

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  • Stable, quick, and simple-mode method for evaluating minimum excircle diameter
  • Stable, quick, and simple-mode method for evaluating minimum excircle diameter
  • Stable, quick, and simple-mode method for evaluating minimum excircle diameter

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Embodiment Construction

[0044] 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.

[0045] assessment_point_set{ p i} the minimum circumscribed circle diameter.

[0046] Step 1: get point set { p i}as follows:

[0047] i

x i

y i

1

5.8895

8.1010

2

9.5280

3.0955

3

9.5169

-3.0878

4

5.8966

-8.0773

5

0.0096

-9.9872

6

-5.8670

-8.0772

7

-9.4997

-3.0757

8

-9.5001

3.1100

9

-5.8735

8.0923

10

0.0022

10.0013

[0048] build state element set { t i}as follows:

[0049] i

t i

1

10.0156

2

10.0182

3

10.0053

4

10.0007

5

9.9872

6

9.9831

7

9.9852

8

...

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PUM

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Abstract

The invention, which belongs to the field of precision metering and computer application, relates to a stable, quick, and simple-mode method for evaluating a minimum excircle diameter. The method comprises: step one, a set of measuring points is obtained and a feature line vector set, a boundary element set and a state element set are established based on the set of measuring points; step two, a measuring point corresponding to a maximum value of the state element set is selected as a key point and a measuring point serial number of the measuring point is added into a key point set; step three, according to the key point set, an analysis matrix and an analysis column vector are established; step four, a rank analysis is carried out on the analysis matrix and an augmentation analysis matrixto determine whether to carry out optimizing continuously, reject the key point or terminate the program, and an optimal value is obtained; step five, the analysis matrix and the analysis column vector are calculated to obtain an optimizing direction; step six, a problem is solved, a new key point is calculated, a measuring point state set is updated, and next circulation is carried out; and stepseven, the program is terminated and an optimal value is obtained.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and relates to a stable, rapid and simple method for assessing the diameter of the minimum circumscribed circle, which can be used for the assessment of the minimum circumscribed circle diameter of parts with a rotary body structure, and for its Provide guidance for the improvement of 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. The definition and identification method of the minimum circumscribed circle diameter are given in the national standard and ISO standard, but the method of calculating the minimum circumscribed circle diameter value from the measurement data is not given. At present, the evaluation method of the minimum circumscribed c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/10
CPCG01B21/10
Inventor 唐哲敏黄美发
Owner 唐哲敏
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