Complex curved part appearance measuring experimental method
A complex curved surface and shape measurement technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of reduced measurement accuracy and achieve the effect of improving measurement accuracy and reducing measurement errors
Inactive Publication Date: 2017-01-04
CHANGCHUN UNIV OF SCI & TECH
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[0003] The purpose of the present invention is to provide a method for measuring the shape of complex curved surface parts, and to solve the technical problem that the measurement accuracy is reduced when the robot changes posture scanning or the scanning area is far apart in the prior art.
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[0014] The present invention will be further elaborated below in conjunction with the accompanying drawings.
[0015] See attached figure 1 , the present invention complex curved surface parts shape measurement experimental method comprises the following steps:
[0016] Step 1: Calibrate the shape sensor;
[0017] Step 2: Obtain the pose of the robot based on IGPS;
[0018] Step 3: Measure the three-dimensional shape of complex curved surface parts;
[0019] Step 4: Obtain point cloud data of complex surface measurement data;
[0020] Step 5: Simplify, extract, and smooth the acquired point cloud data;
[0021] Step 6: IGPS-based complex surface point cloud data stitching;
[0022] Step 7: Analyze and evaluate the measurement accuracy of the shape measurement system.
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The invention relates to a complex curved part appearance measuring experimental method, and belongs to the technical field of appearance measurement. The technical problem that measuring precision is lowered when a robot changes postures for scanning or is far away from a scanning area in the prior art is solved. The method comprises the following steps that an appearance sensor is calibrated; 2, the posture of the robot is obtained based on IGPS; 3, the three-dimensional appearance of a complex curved part is measured; 4, complex curved surface measuring point cloud data is obtained; 5, the obtained point cloud data is simplified, extracted and smoothened; 6, complex curved surface point cloud data splicing based on IGPS is carried out; 7, the measuring precision of an appearance measuring system is analyzed and measured. Point cloud data splicing is achieved through the global point cloud splicing technology based on IGPS, measuring errors introduced by robot movement can be effectively reduced, and measuring precision is improved.
Description
technical field [0001] The invention belongs to the technical field of shape measurement, and in particular relates to an experimental method for shape measurement of parts with complex curved surfaces. Background technique [0002] Industrial robots have high repeat positioning accuracy, but the absolute positioning accuracy is low. Although the kinematic parameters can be corrected to improve the absolute positioning accuracy of the robot, there will still be certain errors. When the robot scans at a different attitude or the scanning area is far apart, the measured data cannot be put together well, and there are translation or rotation misalignments between the point clouds in different areas, but the point cloud data of adjacent attitude scans have overlapping areas. , leading to measurement errors and reducing the measurement accuracy. Contents of the invention [0003] The purpose of the present invention is to provide a method for measuring the shape of parts with ...
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IPC IPC(8): G01B21/20
CPCG01B21/20
Inventor 马国庆郑研斌刘丽于正林
Owner CHANGCHUN UNIV OF SCI & TECH