Automatic gear size parameter measurement method based on machine vision

A technology of automatic measurement and machine vision, which is applied in the direction of instruments, image data processing, image analysis, etc., can solve the problems of expensive detection equipment, large influence of human factors, high maintenance cost, etc., achieve low cost, high degree of automation, and reduce labor costs. cost effect

Inactive Publication Date: 2021-08-06
TONGJI UNIV
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  • Abstract
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Problems solved by technology

These measurement methods require manual operation, high work intensity, strong technicality, greatly affected by human factors, low efficiency, and expensive testing equipment and high maintenance costs

Method used

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  • Automatic gear size parameter measurement method based on machine vision
  • Automatic gear size parameter measurement method based on machine vision
  • Automatic gear size parameter measurement method based on machine vision

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Embodiment Construction

[0018] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, a machine vision-based automatic measurement method for gear size parameters of the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

[0019]

[0020] figure 1 It is a flow chart of the automatic measurement method for gear size parameters based on machine vision in this embodiment, figure 2 It is the image processing result of the measurement process of the automatic measurement method of gear size parameters based on machine vision in this embodiment.

[0021] Such as figure 1 , figure 2 As shown, an automatic measurement method of gear size parameters based on machine vision includes the following steps:

[0022] Step S1, using an image acquisition device to acquire an image of the gear to obtain a gear image.

[0023] In this step, the image acquisition device includes a CMOS...

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Abstract

The invention belongs to the technical field of machine vision measurement, and provides an automatic gear size parameter measurement method based on machine vision, which comprises the following steps of: firstly, binarizing an image by using a Fisher criterion segmentation algorithm based on Laplacian operator edge information, then extracting an edge by using a sub-pixel edge detection method based on Zernike moment, and finally obtaining a gear size parameter. The gear center is determined through a centroid method, the radius of an addendum circle and the radius of a root circle are obtained through calculation by combining a boundary tracking algorithm with a least square fitting method, then a mask is arranged to extract a connected domain of a gear tooth part, and the number of teeth is obtained through marking and counting. The method is high in automation degree, the measurement precision can reach the micron level, the basic parameters of the gear can be rapidly and accurately measured, the method is used for real-time measurement of gear products in industry, and full-automatic intelligent measurement is achieved.

Description

technical field [0001] The invention belongs to the technical field of machine vision measurement, in particular to an automatic measurement method for gear size parameters based on machine vision. Background technique [0002] Gears are one of the most widely used parts in industrial products, and the accuracy of gears has a crucial impact on the stability, precision and life of gear-based motion transmission systems. Quality control has become the focus of manufacturing process inspection in the gear industry. At present, the gear parameter measurement is mainly based on the traditional method of contact measurement, and the manual measurement method is to use measuring instruments to measure, such as vernier calipers, gear pitch micrometers, and profilers. For the contact measurement method, different gear surfaces require path planning and probe radius compensation, and even the workpiece surface will be damaged during the measurement process. In the actual industrial ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/62G06T5/00G06T7/13G06T7/136G06T7/70G06T7/66
CPCG06T7/0004G06T7/62G06T5/002G06T7/13G06T7/136G06T7/70G06T7/66
Inventor 余建波周俊杰
Owner TONGJI UNIV
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