Paper
1 August 2023 Design of monitoring thickness and speed of cylindrical part based on laser self-mixing interference in a single-channel system during external grinding
Wu Sun, Zhuo Yang, Guo Feng, Zeqing Guo
Author Affiliations +
Proceedings Volume 12752, Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023); 127520J (2023) https://doi.org/10.1117/12.2691325
Event: Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023), 2023, Hangzhou, China
Abstract
We design a simultaneous measurement of the thickness and speed to monitor mechanical cylindrical parts during external grinding based on a laser self-mixing interference in a single-channel system. If the wavelength is modulated via the laser-injecting-current to generate a frequency shifting corresponding to the rising- and falling- edge of the triangular modulated function. The Doppler frequency caused by the cylindrical part is split into rising- and falling- edge frequencies by the frequency shifting due to wavelength variations. The expressions of the measurement are derived via the derivative of the phase’s polynomial based on the emission-intensity expressions. The frequency shifting is related to the modulation function and the thickness of the cylindrical part. The rising- and falling- edge frequencies of the laser self-mixing interference obtained from the spectrum are used for calculating the Doppler frequency and the frequency shifting for estimating the thickness and the rotation speed of a cylindrical part during external grinding and the results show a good standard derivation less than 10−3 .
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wu Sun, Zhuo Yang, Guo Feng, and Zeqing Guo "Design of monitoring thickness and speed of cylindrical part based on laser self-mixing interference in a single-channel system during external grinding", Proc. SPIE 12752, Second International Conference on Optoelectronic Information and Computer Engineering (OICE 2023), 127520J (1 August 2023); https://doi.org/10.1117/12.2691325
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KEYWORDS
Laser frequency

Modulation

Modulation frequency

Doppler effect

Design and modelling

Frequency modulation

Optical fibers

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