Tooth error vision measurement method for involute of straight toothed spur gear

A technology of spur gear and tooth profile error is applied in the field of visual measurement of involute tooth profile error of spur gears to achieve the effects of improving measurement accuracy, simplifying calculation process and high measurement accuracy

Inactive Publication Date: 2016-05-11
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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[0011] The object of the present invention is to provide an online measurement method of camshaft diameter size based on laser vision imaging system, which ove

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  • Tooth error vision measurement method for involute of straight toothed spur gear
  • Tooth error vision measurement method for involute of straight toothed spur gear
  • Tooth error vision measurement method for involute of straight toothed spur gear

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[0045] Invention idea of ​​the present invention is:

[0046] The invention adopts the principle of visual imaging under active laser lighting, and considers the positional relationship between the CCD camera, the line laser and the measured gear, and comprehensively uses methods such as camera calibration, light strip center line detection and corner point detection to realize measurement. This method uses a CCD camera to detect the position change of the light spot irradiated by the inline laser on the object, and calculates the involute tooth profile error according to the calibration model of the system. In the calibration process, this method takes into account the distortion of the light strip image, which can effectively improve the calibration accuracy. During the measurement process, the measured gear does not require a specific positional relationship with the measurement system, which relaxes the placement requirements of the measurement system and is more conducive...

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Abstract

The invention relates to a tooth error vision measurement method for the involute of a straight toothed spur gear. According to the method, an involute tooth error measurement model is established based on a linear laser vision imaging system. In combination with the light stripe centric line detection technique, the corner point detection technique, the camera calibration technique and the like, the measurement of a to-be-measured object is realized. The method comprises the steps of 1) calibrating a vision imaging model under the effect of laser active illumination; 2) calibrating the parameters of a pseudo light plane equation; 3) calculating the three-dimensional coordinates of a to-be-measured point on the surface of a tooth profile; 4) calculating the tooth error for the involute of the surface of the tooth profile. According to the method, based on the vision measurement technique, the online non-contact detection is implemented. Meanwhile, based on the precise laser active illumination technique, the high measurement accuracy is ensured. The measurement accuracy of the method for gears of IT 6-8 level in accuracy is smaller than or equal to 0.015 mm.

Description

technical field [0001] The invention relates to the field of laser measurement, in particular to a visual measurement method for involute tooth profile errors of spur gears. Background technique [0002] In recent years, the manufacturing industry represented by the automobile industry has developed rapidly in our country. As an important part of the transmission system in the manufacturing industry, the manufacturing technology of gears has also been greatly improved. One of the overall development strategies of my country's manufacturing industry is to develop China into a global industrial gear manufacturing and supply base, which has also been recognized by most domestic gear manufacturers. The recovery of the equipment manufacturing industry, the rise of aerospace supply, the rapid development of the IT industry and the prosperity of the shipbuilding industry have put forward higher requirements for the gear manufacturing industry, but also provided unprecedented oppor...

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Application Information

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IPC IPC(8): G01B11/25
CPCG01B11/25G01B11/2504
Inventor 李冠楠徐新行王恒坤庄昕宇王兵
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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