A method for calibrating the center position of a turntable in a four-axis vision measuring device
A technology of visual measurement and turntable center, applied in the field of visual measurement
Active Publication Date: 2020-10-09
CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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Problems solved by technology
At present, there is no effective and reliable solution to the problem of calibration of the center position of the turntable in the four-axis visual coordinate measurement system
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[0035] The technical scheme of the present invention will be described in further detail below in conjunction with accompanying drawing and embodiment:
[0036] See attached figure 1 As shown, the four-axis vision measurement device includes a worktable 1 , a turntable 2 , an image acquisition device 3 , a camera attitude adjustment seat 4 and a three-coordinate moving mechanism 5 . The machine coordinate system O-XYZ of the four-axis vision measuring device is a space Cartesian coordinate system, the directions of its X, Y and Z coordinate axes are respectively the same as the directions of the three linear axes of the device, and the origin O is located on each linear axis through mechanical adjustment, make the axis 7 of the turntable 2 parallel to the Z-axis direction of the four-axis visual measuring device, that is, the unit direction vector of the axis 7 in O-XYZ is (0,0,1).
[0037] The workbench 1 and the three-coordinate moving mechanism 5 are realized by the frame ...
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The invention provides a calibration method for a center position of a rotation table in a four-axis visual measurement device. According to the method, the four-axis visual measurement device is composed of a working table, the rotation table, an image collection device, a camera gesture adjustment base and a three-dimensional mobile mechanism and comprises three straight line axes of X, Z and Yand a rotation axis A. According to the method, with the help of a cuboid calibration block which is made of hard alloy steel, through space linear motion of the three-dimensional mobile mechanism androtation motion of the rotation table, images of the edge of the calibration block at different angle positions and the upper edge of the table top of the rotation table are collected, reading of grating rulers of all the straight line axes is recorded, through an image processing technology, in combination with the thickness and size of the calibration block, three-dimensional space coordinates(X0, Y0, Z0) of the center of the rotation center in a machine coordinate system O-XYZ of the four-axis visual measurement device are obtained through solution, and the center position of the rotationtable is calibrated.
Description
technical field [0001] The invention relates to a method for calibrating the center position of a turntable in a four-axis visual measurement device, which belongs to the technical field of visual measurement. Background technique [0002] In many industrial fields such as aviation, aerospace, weapons and ships, rotary parts account for a large proportion of various parts. Generally speaking, revolving parts refer to mechanical parts whose shape characteristics conform to the characteristics of revolving bodies. Although the structure and size of revolving parts are different due to their different uses, the detection and control of their structure and size parameters have great significance. High requirements, because many revolving parts are key components of mechanical equipment, their shape and position errors and manufacturing accuracy will have a great impact on their assembly and performance, not only will affect the matching properties of the contact surface, It wil...
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IPC IPC(8): G01B11/27G01B11/00
CPCG01B11/00G01B11/005G01B11/27
Inventor 毕超郝雪房建国刘孟晨刘勇
Owner CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC