Laser Doppler vibrometer and bending wave based dynamic material characterization of organic aerogel panels

2019 ◽  
Vol 145 (3) ◽  
pp. 1824-1824
Author(s):  
Max Miller ◽  
Sadeq Malakooti ◽  
Ning Xiang ◽  
Nicholas Leventis ◽  
Hongbing Lu
Keyword(s):  
Material Characterization ◽  
Laser Doppler Vibrometer ◽  
Laser Doppler ◽  
Organic Aerogel ◽  
Bending Wave

scholarly journals Characterization of laser Doppler vibrometers using acousto-optic modulators

ACTA IMEKO ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 361
Author(s):  
Michael Gaitan ◽  
Jon Geist ◽  
Benjamin J. Reschovsky ◽  
Ako Chijioke
Keyword(s):  
Frequency Shift ◽  
Excitation Frequency ◽  
Laser Doppler Vibrometer ◽  
Laser Doppler ◽  
New Approach ◽  
Frequency Reference ◽  
Discrete Velocity ◽  
Velocity Shift ◽  
Vibration Excitation

We report on a new approach to characterize the performance of a laser Doppler vibrometer (LDV). The method uses two acousto-optic modulators (AOMs) to frequency shift the light from an LDV by a known quantity to create a synthetic velocity shift that is traceable to a frequency reference. Results are presented for discrete velocity shifts and for sinusoidal velocity shifts that would be equivalent to what would be observed in an ideal accelerometer vibration calibration. The method also enables the user to sweep the synthetic vibration excitation frequency to characterize the bandwidth of an LDV together with its associated electronics.

Dynamic characterization of bulk micromachined accelerometer using laser doppler vibrometer (LDV)

2014 ◽  
Vol 21 (10) ◽  
pp. 2221-2232 ◽  
Author(s):  
A. Sharma ◽  
R. Mukhiya ◽  
S. Santosh Kumar ◽  
R. Gopal ◽  
B. D. Pant
Keyword(s):  
Laser Doppler Vibrometer ◽  
Laser Doppler ◽  
Dynamic Characterization

scholarly journals How Geometric Misalignments can affect the Accuracy of Measurements by a Novel Configuration of Self-Tracking LDV

ACTA IMEKO ◽  
2014 ◽  
Vol 3 (4) ◽  
pp. 26 ◽  
Author(s):  
Giuseppe Dinardo ◽  
Laura Fabbiano ◽  
Gaetano Vacca
Keyword(s):  
Single Point ◽  
Laser Doppler Vibrometer ◽  
The Self ◽  
Laser Doppler ◽  
Tracking Technique ◽  
Accuracy Of Measurements ◽  
Experimental Apparatus ◽  
Out Of Plane ◽  
Set Up

Aim of the paper is to evaluate the reliability of a novel configuration of a Laser Doppler Vibrometer (LDV) for the measurement of vibrations affecting rotating components of machines. In the paper an analysis of errors due to the possible static misalignments of the mirrors utilized in an experimental apparatus has been carried out. This instrument was set up for the estimation of the out of plane vibrations of moving (rotating) objects, in order to give a better characterization of the self-tracking technique employed with the use of a 1D single point LDV and its measurements. The accuracies of the measures are mostly linked to the interaction between environment and instrumentation.

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