Line Laser Based Roundness and Flatness Measurement of Compressor Crankshaft
[1]LIANG Jie,SUN Zhenwei.Line Laser Based Roundness and Flatness Measurement of Compressor Crankshaft[J].Journal of Zhengzhou University (Engineering Science),2024,45(04):133-139.[doi:10.13705/ j.issn.1671-6833.2024.04.001]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
45
Number of periods:
2024 04
Page number:
133-139
Column:
Public date:
2024-06-16
- Title:
- Line Laser Based Roundness and Flatness Measurement of Compressor Crankshaft
- Keywords:
- line laser displacement sensor; non-contact measurement; air conditioning compressor crankshaft; roundness measurement; flatness measurement
- CLC:
- TG801TN249
- DOI:
- 10.13705/ j.issn.1671-6833.2024.04.001
- Abstract:
- Aiming at the problems of low efficiency and inability in accurate assessment of the roundness and flatness of air conditioning compressor crankshaft, which were measured manually with a micrometer, a set of non-con tact measurement system of roundness and flatness of air conditioning compressor crankshaft based on a line laser displacement sensor was designed. Firstly, a calibration method of systematic error was proposed by measuring a standard measuring rod. Then, based on the line laser sampling data, an extraction algorithm of crankshaft cross section roundness measurement points was developed, and the systematic error was used for the compensation of the measurement points to realize the roundness measurement of the crankshaft. After that, the contour line was separa ted according to the slope between the measurement points of the crankshaft plane, and the streamlined point cloud data were obtained by the homogeneous down sampling method, and the least square method was used to realize the flatness measurement of the crankshaft. Finally, the crankshaft roundness and flatness measurement experiments were carried out based on the above methods. The experimental results showed that the roundness measurement ac curacy of the system was less than 4 μm, the flatness measurement accuracy was less than 2 μm, the repeatability error of roundness measurement was less than 0.8 μm, and the repeatability error of flatness measurement was less than 0.3 μm, which could satisfy the requirements of fast and accurate measurement of roundness and flatness of crankshaft.
- References:
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Last Update:
2024-06-14