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Cylindrical part inner wall defect size three-dimensional measurement system and measurement method thereof

A technology for defect size and three-dimensional measurement, which is applied in the directions of measuring devices, optical testing flaws/defects, and image data processing, etc. False detection and other problems, to achieve the effect of reducing manufacturing errors, high efficiency, and improving work efficiency

Pending Publication Date: 2022-04-05
哈尔滨工业大学芜湖机器人产业技术研究院
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Problems solved by technology

According to the structural characteristics of specific workpieces, a detection algorithm suitable for the detection environment is designed to achieve accurate positioning, measurement and defect identification of specific workpiece surface defect detection, improve the processing speed and detection accuracy of online detection, and reduce the misjudgment rate of the detection system. Compared with image processing methods, the loss of three-dimensional shape information has a greater impact on the analysis results and accuracy, as well as the disturbance of external environment changes, and it is easy to misdetect

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  • Cylindrical part inner wall defect size three-dimensional measurement system and measurement method thereof
  • Cylindrical part inner wall defect size three-dimensional measurement system and measurement method thereof
  • Cylindrical part inner wall defect size three-dimensional measurement system and measurement method thereof

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Embodiment Construction

[0051] The specific implementation of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.

[0052] The present invention is applied to automatic detection technology fields such as energy, chemical industry, automobile, aviation, etc., and is mainly used in collecting three-dimensional shape data on the inner wall of a cylinder and measuring whether there are scratches, depressions, or corrosion on the inner wall surface, and judging based on the parameters of the measurement results Whether the workpiece is qualified.

[0053] Applicable cylinder inner wall diameter ranges from Φ15mm to Φ35mm, and the cylinder depth exceeds 200mm.

[0054] Such as figure 1 , figure 2 The structure of the present invention shown is a thr...

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Abstract

The invention discloses a cylindrical part inner wall defect size three-dimensional measurement system. A multi-degree-of-freedom displacement mechanism, a part fixing table and an observation structure supporting frame are arranged on a stable measurement platform; an observation mechanism is arranged on the observation structure supporting frame, and an observation module and a measurement sensor are arranged on the observation mechanism; and the cylindrical part is fixed on the part fixing table. The invention further discloses a measuring method of the three-dimensional measuring system. According to the technical scheme, non-contact measurement is adopted, and manufacturing errors of a traditional contact type measuring instrument and reading errors caused by human factors are reduced; model fitting is carried out based on the RANSAC algorithm, the robustness is high, and the efficiency is higher; high-precision multi-angle displacement driving is adopted, vertical lifting and 360-degree all-dimensional inductive triggering are achieved, integrated automatic execution is achieved, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of automatic detection of products in the manufacturing industry. More specifically, the present invention relates to a three-dimensional measurement system for the defect size of the inner wall of a cylindrical part. The invention also relates to a measuring method of the three-dimensional measuring system. Background technique [0002] At present, the measurement and detection of the inner wall shape of cylindrical parts can be divided into contact detection and non-contact detection. Although contact detection has high measurement accuracy, its efficiency is low, and it is easy to cause a certain degree of damage to the inner surface of the workpiece. It is even more difficult to detect parts in a confined space, and has certain limitations in application, which brings great difficulties to measuring the complete shape of the inner wall and obtaining high-precision surface size data. Non-contact detect...

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Application Information

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IPC IPC(8): G01B11/24G01N21/88G06F30/23G06T17/00
Inventor 王飞阳庄金雷陈海东
Owner 哈尔滨工业大学芜湖机器人产业技术研究院
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