Strain measurement range enhanced chirped pulse φ-OTDR for distributed static and dynamic strain measurement based on random fiber grating array

2020 ◽  
Vol 45 (21) ◽  
pp. 6110
Author(s):  
Yuan Wang ◽  
Ping Lu ◽  
Stephen Mihailov ◽  
Liang Chen ◽  
Xiaoyi Bao
Keyword(s):  
Strain Measurement ◽  
Measurement Range ◽  
Dynamic Strain ◽  
Fiber Grating ◽  
Chirped Pulse ◽  
Grating Array

Distributed time delay sensing in a random fiber grating array based on chirped pulse φ-OTDR

2020 ◽  
Vol 45 (13) ◽  
pp. 3423 ◽  
Author(s):  
Yuan Wang ◽  
Ping Lu ◽  
Stephen Mihailov ◽  
Liang Chen ◽  
Xiaoyi Bao
Keyword(s):  
Time Delay ◽  
Fiber Grating ◽  
Chirped Pulse ◽  
Distributed Time Delay ◽  
Grating Array

scholarly journals Simultaneously distributed temperature and dynamic strain sensing based on a hybrid ultra-weak fiber grating array

2020 ◽  
Vol 28 (23) ◽  
pp. 34309
Author(s):  
Chengli Li ◽  
Jianguan Tang ◽  
Cheng Cheng ◽  
Longbao Cai ◽  
Huiyong Guo ◽  
...  
Keyword(s):  
Dynamic Strain ◽  
Fiber Grating ◽  
Strain Sensing ◽  
Grating Array

Ultra-low frequency dynamic strain detection with laser frequency drifting compensation based on a random fiber grating array

2021 ◽  
Vol 46 (4) ◽  
pp. 789
Author(s):  
Yuan Wang ◽  
Ping Lu ◽  
Stephen Mihailov ◽  
Liang Chen ◽  
Xiaoyi Bao
Keyword(s):  
Low Frequency ◽  
Laser Frequency ◽  
Dynamic Strain ◽  
Fiber Grating ◽  
Grating Array ◽  
Strain Detection

Loading condition estimation using long-period fiber grating array

2020 ◽  
pp. 1-1
Author(s):  
Felipe Oliveira Barino ◽  
Renato Faraco-Filho ◽  
Deivid Campos ◽  
Vinicius N. H. Silva ◽  
Andres P. Lopez-Barbero ◽  
...  
Keyword(s):  
Loading Condition ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Condition Estimation ◽  
Grating Array ◽  
Period Fiber Grating

Speed Estimation of a Three Phase Induction Motor Using Stator Dynamic Strain Measurement by Fiber Bragg Grating Sensor based in SVR

2021 ◽  
Author(s):  
Rafael Mancuso Paraiso Cavalcanti ◽  
Jaqueline Bierende ◽  
Beatriz Brusamarello ◽  
Jean Carlos Cardozo Da Silva ◽  
Giovanni Alfredo Guarneri ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Induction Motor ◽  
Strain Measurement ◽  
Fiber Bragg Grating Sensor ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Speed Estimation ◽  
Three Phase ◽  
Bragg Grating Sensor

scholarly journals Minimizing Vibratory Strain Measurement Error

1998 ◽  
Author(s):  
Mark D. Sensmeier ◽  
Kurt L. Nichol
Keyword(s):  
Measurement Error ◽  
Objective Function ◽  
Strain Gage ◽  
Strain Measurement ◽  
Measured Data ◽  
Dynamic Strain ◽  
Model Predictions ◽  
Modes Of Vibration ◽  
Instrumentation Error ◽  
Time Basis

Correlation between dynamic strain gage measurements and modal analysis results can be adversely affected by gage misplacement and gage misorientation. An optimization algorithm has been developed which allows the modeled strain gage locations and orientations to be varied within specified tolerances. An objective function is defined based on the least squares sum of the differences between experimental and model results. The Kuhn-Tucker conditions are then applied to find the gage locations and orientations which minimize this objective function. The procedure is applied on a one-time basis considering all measured modes of vibration simultaneously. This procedure minimizes instrumentation error which then allows the analyst to modify the model to more accurately represent other factors, including boundary conditions. Flat plate vibratory data was used to demonstrate a significant improvement in correlation between measured data and model predictions.

Sign in / Sign up

Export Citation Format

Share Document