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Method and system for measuring pitting area ratio of tooth surface

An area ratio and tooth surface technology, which is applied in the field of pitting corrosion area ratio measurement methods and systems on tooth surfaces, can solve the problems of large manual workload, high error rate, low efficiency, etc., and achieves improved measurement efficiency, improved objectivity, and reduced The effect of manual measurement of burden

Active Publication Date: 2018-12-21
CRRC QINGDAO SIFANG CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on the above problems, this application provides a method and system for measuring the pitting area rate of the tooth surface, aiming at solving the problems of too much subjectivity, large manual workload, low efficiency and high error rate in measuring the pitting area rate of gears

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  • Method and system for measuring pitting area ratio of tooth surface
  • Method and system for measuring pitting area ratio of tooth surface
  • Method and system for measuring pitting area ratio of tooth surface

Examples

Experimental program
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Embodiment 1

[0076] see figure 1 , which is a flow chart of the method for measuring the tooth surface pitting area ratio provided by the embodiment of the present application.

[0077] Such as figure 1 As shown, the tooth surface pitting area ratio measurement method provided in this embodiment includes:

[0078] S101: Acquiring tooth surface acquisition images of gears.

[0079] First of all, it is necessary to understand the interrelationship between gear tooth surface, meshing area, pitting pit and pitting area rate.

[0080] The gears contain a plurality of teeth, and each tooth contains two tooth faces, a front face and a reverse face, for intermeshing with the teeth of other gears. There is a meshing area on each tooth surface of each tooth, and pitting pits are formed on the meshing area due to long-term wear. Pitting pits are mainly distributed in the meshing area of ​​the tooth surface. The pitting area ratio refers to the area occupancy of pitting pits in the meshing area o...

Embodiment 2

[0157] see Figure 5 , which is a flow chart of the method for measuring the tooth surface pitting area ratio provided in this embodiment.

[0158] Such as Figure 5 As shown, the method for measuring the tooth surface pitting area ratio provided in the embodiment of the present application includes:

[0159] S501: at a preset time interval t 1 Take a picture of the front side of the tooth surface of the gear, and obtain an image of the front side of the tooth surface of the gear.

[0160] In this example, t 1 = 0.5 seconds. Write down the acquisition time t of the frontal image acquisition of a certain tooth surface.

[0161] S502: Process the collected image of the front surface of the tooth surface by the region of interest segmentation method, and determine the collected image of the front surface of the tooth surface that meets the requirements.

[0162] In this embodiment, with the threshold T gThreshold segmentation is performed on the collected image of the fron...

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Abstract

A method and system for measure a pitting area ratio of a tooth surface is disclosed. Firstly, the tooth surface image of the gear is acquired. After that, the image of tooth surface is processed to obtain the binary image of meshing region and the binary image of pitting-like pit. According to the binary image of the meshing region and the binary image of the pitting pit, the binary image of thepitting pit is obtained. Finally, according to the number of non-zero pixels in the binary image of the meshing region and the number of non-zero pixels in the binary image of the pitting pit, the pitting area ratio of the gear tooth surface is obtained. This method does not need to rely on the human eye measurement, only needs to acquire the gear surface image to obtain the pitting area ratio ofgear surface, which greatly reduces the burden of manual measurement and improves the measurement efficiency. In addition, compared with the prior art, the pitting area ratio of the tooth surface calculated by the method is used to quantitatively evaluate the wear degree of the gear, so that the objectivity of the evaluation is improved.

Description

technical field [0001] The present application relates to the field of mechanical equipment and system detection, in particular to a method and system for measuring the pitting area ratio of tooth surfaces. Background technique [0002] Gear transmission is widely used in various mechanical equipment such as aerospace, high-speed rail, and machine tools. The safety and reliability of mechanical equipment are closely related to the performance status of gears. During the gear meshing process of high-speed rail trains, due to the periodically changing force on the gear tooth surface, it is easy to generate tiny fatigue cracks in the meshing area, that is, the area where the internal and external gears occlude and contact. As the fatigue cracks continue to extend and expand, small pieces of metal on the tooth surface will eventually fall off, forming pitting pits. [0003] The key to detecting the gear performance status is to detect the wear degree of the gear. The wear degre...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/11G06T7/155G06T7/62G01N21/88
CPCG01N21/8851G01N2021/8887G06T7/0004G06T7/11G06T7/155G06T7/62G06T2207/30164
Inventor 李富强王传刚郭鹏飞李艳于海源李瑞龙高仕峰魏志欣
Owner CRRC QINGDAO SIFANG CO LTD
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