Improved holographic method for vibration amplitude measurement from nano to microscale

2014 ◽  
Author(s):  
Pavel Psota ◽  
Vít Lédl ◽  
Roman Doleček ◽  
Jan Václavík ◽  
Václav Kopecký
Keyword(s):  
Vibration Amplitude ◽  
Holographic Method ◽  
Amplitude Measurement

New possibilities for vibration-amplitude measurement by heterodyne laser vibrometer

2000 ◽  
Vol 43 (2) ◽  
pp. 140-143
Author(s):  
V. G. Atavin ◽  
A. A. Mokhnatov ◽  
Yu. V. Khudyakov
Keyword(s):  
Vibration Amplitude ◽  
Laser Vibrometer ◽  
Amplitude Measurement

Quantitative Vibration Amplitude Measurement Using Stroboscopic Phase Shifting ESPI

2006 ◽  
Vol 321-323 ◽  
pp. 95-98 ◽  
Author(s):  
Hyun Chul Jung ◽  
Koung Suk Kim
Keyword(s):  
Vibration Amplitude ◽  
Natural Frequencies ◽  
Measurement Techniques ◽  
Phase Shifting ◽  
Mode Shapes ◽  
Ansys Analysis ◽  
Amplitude Measurement ◽  
Stroboscopic Illumination ◽  
Square Plate ◽  
Optical Vibration

The stroboscopic phase shifting ESPI (SPS-ESPI), one of the optical vibration amplitude measurement techniques, is presented. Although the general PS-ESPI can be used for quantitative deformation measurement of the object, this technique cannot measure the vibration amplitude with itself only. The phase change due to the vibration of the object cannot be calculated with general PS-ESPI correctly. Therefore, in order to solve this problem, the stroboscopic illumination must be introduced to the general PS-ESPI. This can be done by using a device called as AOM (Acousto-Optic Modulator). In this paper, SPS-ESPI is applied to measure the vibration amplitude of the square plate whose all edges were fixed. The natural frequencies and mode shapes are analyzed by using ANSYS. And the results obtained by using SPS-ESPI technique are compared with that of the ANSYS analysis. The vibration amplitude is measured by using SPS-ESPI quantitatively.

Advanced time average holographic method for measurement in extensive vibration amplitude range with quantitative single-pixel analysis

2015 ◽  
Author(s):  
Pavel Psota ◽  
Vít Lédl ◽  
Petr Vojtíšek ◽  
Jan Václavík ◽  
Roman Doleček ◽  
...  
Keyword(s):  
Vibration Amplitude ◽  
Holographic Method ◽  
Pixel Analysis ◽  
Time Average ◽  
Single Pixel
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