Large Dynamic Strain Measurement in Φ-OTDR Based on Ultra-Weak FBG Array

2020 ◽  
Author(s):  
Rui Hong ◽  
Feng Wang ◽  
Yu Liu ◽  
Guojie Tu ◽  
Zhen Liu ◽  
...  
Keyword(s):  
Strain Measurement ◽  
Dynamic Strain ◽  
Weak Fbg

Dynamic strain measurement of identical weak FBG array based on active mode locking laser cavity

2018 ◽  
Author(s):  
Gyeong Hun Kim ◽  
Hwi Don Lee ◽  
Youngjoo Chung ◽  
Chang-Seok Kim
Keyword(s):  
Strain Measurement ◽  
Laser Cavity ◽  
Mode Locking ◽  
Dynamic Strain ◽  
Active Mode ◽  
Weak Fbg

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.

Temperature Compensated Dynamic Strain Measurement Using Twin Fiber Bragg Gratings and Tunable Laser Interrogation with Noise Cancelation

2021 ◽  
pp. 117-120
Author(s):  
Nandini Basumallick ◽  
Rajarshi Mitra ◽  
Dipten Kumar ◽  
Palas Biswas ◽  
Somnath Bandyopadhyay
Keyword(s):  
Strain Measurement ◽  
Fiber Bragg Gratings ◽  
Tunable Laser ◽  
Bragg Gratings ◽  
Dynamic Strain ◽  
Noise Cancelation

The Measurement of Dynamic Stress for The Top-Cutter Machine of Cotton

2010 ◽  
Vol 34-35 ◽  
pp. 1323-1327 ◽  
Author(s):  
Chun Mei Xu ◽  
Chun Yao Wang ◽  
Fa Chen ◽  
Min Lei ◽  
Yong Xin Jiang ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Strain Measurement ◽  
Measurement Method ◽  
Dynamic Stress ◽  
Stress Condition ◽  
Dynamic Strain ◽  
Measurement Result

In this paper, we used the dynamic strain measurement method to measure the top-cutter machine of cotton’s stress under its working state. With sorting out data and analyzing it, we obtained the stress condition of the framing and the working parts. And the measurement result could be used to analyze the axle’s fatigue strength and check whether it was safe or not. It provided integrant basis for the further design of the machine.

Behavior of Plated Microbumps during Ultrasonic Flip-Chip Bonding Determined from Dynamic Strain Measurement

2003 ◽  
Vol 42 (Part 1, No. 4B) ◽  
pp. 2193-2197 ◽  
Author(s):  
Naoya Watanabe ◽  
Tanemasa Asano
Keyword(s):  
Strain Measurement ◽  
Flip Chip ◽  
Dynamic Strain ◽  
Flip Chip Bonding
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