The literature review reveals this fact that although the significant advantages of laser scanners have created a great growing tendency to use this type of inspection, there are still functional restrictions, considerably effect on their measurement quality. Due to existing a rather large number of factors, which potentially effect on scanners performance, their accuracy is categorized in a lower level than conventional touch-trigger probes.
Some scanning factors were introduced during previous research. This fact is also revealed that the scanning process over shiny surfaces is more sensitive. This study focuses on the quality of laser scanning measurement over reflective parts to assess the influence of some scanning factors including ambient lighting, surface slope, surface form, and software data processing options.
The main objective of current study is determined to present a technical guideline to improve the accuracy of measurement over glossy surfaces. The measurement performance was evaluated for Metris LC50 laser scanner in ETS Metrology Laboratory and the accuracy of scanned result was compared to the reference values measured by the high-accurate touchtrigger probes on Mitutoyo Coordinate Measuring Machines (CMM). Also, The PolyWorks® software was applied to find an optimized method of data processing. The experiment was designed in seven phases. In each phase, the deviation from reference is the main accuracy criterion.
The results emphasize the role of data scanning and processing parameters as well as the surface characteristics. As the main result, the quality of laser scanning reduce in a high level of ambient lighting and over surfaces with a high slope. In addition, a recommended software setup was presented to achieve more accurate measurement through laser scanners.
| Date | 22 Apr 2021 |
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| Original language | American English |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Antoine Tahan (Supervisor) |
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Kazemeyni, S. S. (Author),
Tahan (Supervisor),
22 Apr 2021Student thesis: Master's thesis › Master in Engineering: Mechanical Engineering