Ji, H and Hsu, H-Y and Kong, L X and Wedding, A B (2009) Development of a contact probe incorporating a Bragg grating strain sensor for nano coordinate measuring machines. Measurement Science and Technology, 20 (9). 095304.
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Official URL: http://stacks.iop.org/0957-0233/20/i=9/a=095304
This paper presents a novel optical fibre based micro contact probe system with high sensitivity and repeatability. In this optical fibre probe with a fused spherical tip, a fibre Bragg grating has been utilized as a strain sensor in the probe stem. When the probe tip contacts the surface of the part, a strain will be induced along the probe stem and will produce a Bragg wavelength shift. The contact signal can be issued once the wavelength shift signal is produced and demodulated. With the fibre grating sensor element integrated into the probe directly, the probe system shows a high sensitivity. In this work, the strain distributions along the probe stem with the probe under axial and lateral load are analysed. A simulation of the strain distribution was performed using the finite element package ANSYS 11. Performance tests using a piezoelectric transducer stage with a displacement resolution of 1.5 nm yielded a measurement resolution of 60 nm under axial loading.
|Deposited By:||Prof. Alexey Ivanov|
|Deposited On:||01 Nov 2011 23:34|
|Last Modified:||02 Nov 2011 00:47|
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