Multi-beam laser heterodyne measurement with ultra-precision for Young modulus based on oscillating mirror modulation

Y. Chao Li; Q. Ding; Y. Gao; L. Ling Ran; J. Ru Yang; C. Yu Liu; C. Hui Wang; J. Feng Sun

doi:10.1117/12.2064949

21 August 2014 Multi-beam laser heterodyne measurement with ultra-precision for Young modulus based on oscillating mirror modulation

Y. Chao Li, Q. Ding, Y. Gao, L. Ling Ran, J. Ru Yang, C. Yu Liu, C. Hui Wang, J. Feng Sun

Author Affiliations +

Proceedings Volume 9233, International Symposium on Photonics and Optoelectronics 2014; 923317 (2014) https://doi.org/10.1117/12.2064949
Event: International Symposium on Photonics and Optoelectronics (SOPO 2014), 2014, Suzhou, China

Abstract

This paper proposes a novel method of multi-beam laser heterodyne measurement for Young modulus. Based on Doppler effect and heterodyne technology, loaded the information of length variation to the frequency difference of the multi-beam laser heterodyne signal by the frequency modulation of the oscillating mirror, this method can obtain many values of length variation caused by mass variation after the multi-beam laser heterodyne signal demodulation simultaneously. Processing these values by weighted-average, it can obtain length variation accurately, and eventually obtain value of Young modulus of the sample by the calculation. This novel method is used to simulate measurement for Young modulus of wire under different mass by MATLAB, the obtained result shows that the relative measurement error of this method is just 0.3%.

Citation Download Citation

Y. Chao Li, Q. Ding, Y. Gao, L. Ling Ran, J. Ru Yang, C. Yu Liu, C. Hui Wang, and J. Feng Sun "Multi-beam laser heterodyne measurement with ultra-precision for Young modulus based on oscillating mirror modulation", Proc. SPIE 9233, International Symposium on Photonics and Optoelectronics 2014, 923317 (21 August 2014); https://doi.org/10.1117/12.2064949

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