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- W1997114311 abstract "Grating displacement measurement technique is an important means to achieve precise displacement measurement of nanometer scale. Moire fringe phase difference measurement is the basis of grating displacement measurement technique. Traditional Moire fringe subdivision method based on DFT algorithm has low frequency resolution relatively when extracting Moire fringe fundamental frequency spectral line, which causes frequency and phase measurement errors of Moire fringe fundamental frequency. CZT spectrum zoom technique can improve the frequency resolution of frequency band near Moire fringe fundamental frequency and get fundamental frequency spectrum lines more exactly, which can solve the problem of low frequency resolution of DFT. The paper studies the relation of Moire fringe phase difference and grating displacement, and analyzes the working principles of DFT and CZT spectrum zoom method. DFT and CZT spectrum zoom are used for Moire fringe spectrum analysis and phase difference calculation respectively. Simulation results show measurement error of Moire fringe phase difference with DFT algorithm is in 10 -3 degree scale, while measurement error with CZT spectrum zoom algorithm is approximate 0 degree. The comparison results show CZT spectrum zoom method has better performance and applicability, which improves the phase difference measurement accuracy of Moire fringe effectively. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3461" @default.
- W1997114311 created "2016-06-24" @default.
- W1997114311 creator A5063040568 @default.
- W1997114311 creator A5069334991 @default.
- W1997114311 date "2013-10-01" @default.
- W1997114311 modified "2023-09-27" @default.
- W1997114311 title "Moiré Fringe Phase Difference Measurement Based on Spectrum Zoom Technology" @default.
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- W1997114311 doi "https://doi.org/10.11591/telkomnika.v11i10.3461" @default.
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