Vision measuring method of crankshaft crank eccentricity and device thereof

A visual measurement and crankshaft technology, applied in measurement devices, optical devices, instruments, etc., can solve the problems of surface damage of crankshaft parts, unqualified crankshaft products, and long measurement process, so as to achieve system stability, improve production efficiency, reduce The effect of human resources spending

Inactive Publication Date: 2015-09-16
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

The traditional quality measurement of crankshaft eccentricity is mainly completed by contact three-coordinate measuring machine or special measuring equipment (such as crankshaft eccentricity tester), the measurement steps ar

Method used

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  • Vision measuring method of crankshaft crank eccentricity and device thereof
  • Vision measuring method of crankshaft crank eccentricity and device thereof
  • Vision measuring method of crankshaft crank eccentricity and device thereof

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Embodiment Construction

[0051] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0052] refer to figure 1 , in order to facilitate the measurement of the eccentricity of the crankshaft crank, the preferred embodiment of the present invention firstly provides a visual measuring device for the eccentricity of the crankshaft crank, comprising a cuboid frame 1 composed of aluminum profiles, the bottom of the frame 1 is provided with a bottom plate 2, and the frame 1 The upper side and the right side are respectively provided with a vertical camera 4 and a horizontal camera 5 fixed on the camera mounting plate 3, a vertically installed light source 6 is provided at the bottom of the left side of the rack 1 corresponding to the position of the horizontal camera 5, and the top of the bottom plate 2 The position corresponding to the position of the vertical camera 4 is provided with a horizontally installed light source 7, and th...

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Abstract

The present invention provides a vision measuring method of crankshaft crank eccentricity. The method comprises the steps of (1) making a standard shaft and calibrating a camera parameter, (2) obtaining a crankshaft part image, (3) analyzing and extracting crankshaft part image axis characteristic, (4) calculating a crankshaft crank eccentricity parameter, (5) repeating step (3) and step (4), completing the obtainment of the crank eccentricity parameters of ten groups of different crankshaft pose images, removing a maximum one and a minimum one in ten static data, and taking the average value of the remaining data as a final crank eccentricity value. The present invention also provides a vision measuring device of crankshaft crank eccentricity. The device comprises a rectangular-shaped frame formed by aluminum profile and a vertical camera and a horizontal camera arranged on the frame. According to the method and the device, the measurement time of the crank eccentricity is reduced, the measurement accuracy of the crank eccentricity is raised, the processing efficiency of a crankshaft production line is improved, and the measurement cost of the crank eccentricity is reduced at the same time.

Description

technical field [0001] The invention relates to the field of detection of industrial parts, in particular to a visual measurement method and device for the eccentricity of a crankshaft crank. Background technique [0002] The crankshaft is the key part of the engine, and the two journals rotate at high speed to complete the power transmission of the engine. Among them, crankshaft eccentricity is an important direction of crankshaft quality inspection, which is mainly used to measure the quality of crankshaft dynamic balance. [0003] The measurement parameter of crank throw eccentricity at the machining site is that one journal is used as the reference axis, and the other journal is offset in the radial direction when the axis of the other journal passes a unit distance relative to the reference axis. The eccentric parameters of the crankshaft directly affect the assembly process of the crankshaft and the working quality of the crankshaft. If the eccentric value of the cran...

Claims

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Application Information

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IPC IPC(8): G01B11/27
Inventor 张从鹏侯波罗学科鲁磊赵康康邢庆辉
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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