A non-contact measuring system for in-situ surface characterization based on laser confocal microscopy
Fu, Shaowei and Cheng, Fang and Tjahjowidodo, Tegoeh and Yu, Zhou and Butler, David (2018) A non-contact measuring system for in-situ surface characterization based on laser confocal microscopy. Sensors, 18 (8). 2657. ISSN 1424-8220 (https://doi.org/10.3390/s18082657)
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Abstract
The characterization of surface topographic features on a component is typically quantified using two-dimensional roughness descriptors which are captured by off-line desktop instruments. Ideally any measurement system should be integrated into the manufacturing process to provide in-situ measurement and real-time feedback. A non-contact in-situ surface topography measuring system is proposed in this paper. The proposed system utilizes a laser confocal sensor in both lateral and vertical scanning modes to measure the height of the target features. The roughness parameters are calculated in the developed data processing software according to ISO 4287. To reduce the inherent disadvantage of confocal microscopy, e.g. scattering noise at steep angles and background noise from specular reflection from the optical elements, the developed system has been calibrated and a linear correction factor has been applied in this study. A particular challenge identified for this work is the in-situ measurement of features generated by a robotized surface finishing system. The proposed system was integrated onto a robotic arm with the measuring distance and angle adjusted during measurement based on a CAD model of the component in question. Experimental data confirms the capability of this system to measure the surface roughness within the Ra range of 0.2 – 7 μm (bandwidth λc/λs of 300), with a relative accuracy of 5%.
ORCID iDs
Fu, Shaowei, Cheng, Fang, Tjahjowidodo, Tegoeh, Yu, Zhou and Butler, David ORCID: https://orcid.org/0000-0001-9952-8670;-
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Item type: Article ID code: 65161 Dates: DateEvent13 August 2018Published9 August 2018Accepted7 August 2018SubmittedSubjects: Technology > Engineering (General). Civil engineering (General) > Engineering design
Technology > ManufacturesDepartment: Faculty of Engineering > Design, Manufacture and Engineering Management
Strategic Research Themes > Advanced Manufacturing and MaterialsDepositing user: Pure Administrator Date deposited: 14 Aug 2018 13:14 Last modified: 26 Nov 2024 09:34 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/65161