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Non-contact and multi-point measurement method for measuring internal diameter of circular hole

A multi-point measurement and non-contact technology, which is applied in the field of geometric measurement, can solve the problems of large influence of human factors, difficulty in realizing automation, and insufficient information, so as to achieve convenient operation, reduce error chains, and improve measurement accuracy. Effect

Inactive Publication Date: 2015-11-11
TIANJIN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The operation problem of the measuring instrument: Due to the limitation of the space and the measured object, the aperture measurement cannot be measured by simple installation on the outside like the external dimension measurement, and it is difficult to realize automation
[0005] 2. The problem of measurement accuracy: how to realize the precise measurement of the inner diameter of the circular hole has always been an urgent problem to be solved
[0006] 3. Questions about measurement efficiency
The measurement efficiency is low, the amount of information is insufficient, and the influence of human factors is relatively large

Method used

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  • Non-contact and multi-point measurement method for measuring internal diameter of circular hole

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Embodiment 1

[0047] A method for non-contact multi-point measurement of the inner diameter of a circular hole, see figure 1 , figure 2 , image 3 and Figure 4 , the method for measuring the inner diameter of the circular hole comprises the following steps:

[0048] 101: Build a three-sensor fixed value comparison measuring head;

[0049] see figure 1 and figure 2 , The measuring head of the three-sensor fixed value comparison includes: the fixed plate 7 on the bottom surface of the measuring head, the fixed plate 7 on the bottom surface of the measuring head is provided with the central axis 8 of the measuring head, the central axis 8 of the measuring head is sleeved with an angle and range adjusting plate 2, the angle and The range adjustment disc 2 is provided with a fixing and adjusting hole 3, and the central axis 8 of the measuring head is provided with three sensor fixing frames 6, and the sensor fixing frame 6 is equipped with a laser displacement sensor 5, and the laser dis...

Embodiment 2

[0073] A method for non-contact multi-point measurement of the inner diameter of a circular hole, see figure 2 , image 3 , Figure 5 , Figure 6 and Figure 7 , the method for measuring the inner diameter of the circular hole comprises the following steps:

[0074] 201: Build a four-sensor fixed value comparison measuring head;

[0075] see figure 1 , Figure 5 and Figure 6 , the four-sensor fixed value comparison measuring head includes: measuring head bottom surface fixed plate 7, measuring head bottom surface fixed plate 7 is provided with measuring head axis 8, measuring head axis 8 is sleeved with angle and range adjusting plate 2, angle and The range adjustment disc 2 is provided with a fixing and adjustment hole 3, and the measuring head axis 8 is provided with four sensor holders 6, each sensor holder 6 is equipped with a laser displacement sensor 5, and the laser displacement sensor 5 is provided with a sensor Fixing and adjusting screws 4.

[0076] That i...

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Abstract

The invention provides a non-contact and multi-point measurement method for measuring the internal diameter of a circular hole. The method comprises the steps of constructing a three-sensor / four-sensor constant-value comparison and measurement head; adjusting the measurement optical axis of a laser displacement sensor and meeting preset conditions before measurement and after measurement respectively; and acquiring the radius of a to-be-measured circular hole. According to the technical scheme of the invention, the non-contact constant-value comparison and measurement method is adopted, and a non-contact measurement head is kept far away from the surface of a to-be-measured object. The measurement safety is improved. When the aperture of an inner hole on a workpiece is measured, the measurement head is placed in the to-be-measured hole to complete the measurement. Therefore, the centering or adjusting operation is avoided, and the measurement efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of geometric quantity measurement, in particular to a non-contact multi-point method for measuring the inner diameter of a circular hole. Background technique [0002] With the rapid development of my country's industrial manufacturing industry, the role of precision measuring equipment in the industrial manufacturing process has become more and more important. Aerospace, shipbuilding, engines and turbines and other fields require geometric measurement technology as an effective support. Whenever it is necessary to measure a workpiece at the manufacturing site, the problem of on-machine measurement of the diameter of the inner hole of the workpiece is almost always faced. The traditional methods for measuring the diameter of the inner hole mainly include: micrometer, universal length measuring instrument, Abbe length measuring instrument, and dial indicator. Most of these methods require manual measurement, the measu...

Claims

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Application Information

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IPC IPC(8): G01B11/12
Inventor 李兴强王仲付鲁华贾丙田吴翔宇吴振刚
Owner TIANJIN UNIV
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