Novel FBG triangular filter for interrogating a FBG sensor in dynamic strain measurement

2006 ◽  
Vol 2 (5) ◽  
pp. 336-338
Author(s):  
Li-yang Shao ◽  
Jian-fei Song ◽  
A-ping Zhang ◽  
Sai-ling He
Keyword(s):  
Strain Measurement ◽  
Dynamic Strain ◽  
Fbg Sensor

Viability of using an embedded FBG sensor in a composite structure for dynamic strain measurement

Measurement ◽  
2006 ◽  
Vol 39 (4) ◽  
pp. 328-334 ◽  
Author(s):  
Hang-yin Ling ◽  
Kin-tak Lau ◽  
Li Cheng ◽  
Wei Jin
Keyword(s):  
Composite Structure ◽  
Strain Measurement ◽  
Dynamic Strain ◽  
Fbg Sensor

J044022 Dynamic strain measurement of a mechanical element in liquid hydrogen using an FBG sensor

2012 ◽  
Vol 2012 (0) ◽  
pp. _J044022-1-_J044022-4
Author(s):  
Tomio NAKAJIMA ◽  
Satoshi TAKADA ◽  
Eiichi SATO ◽  
Hlroshi TSUDA ◽  
Akiyoshi SATO
Keyword(s):  
Strain Measurement ◽  
Liquid Hydrogen ◽  
Dynamic Strain ◽  
Fbg Sensor ◽  
Mechanical Element

The Fiber Bragg Grating Sensor and its Interrogator for Dynamic Strain Measurement of Concrete

2013 ◽  
Vol 655-657 ◽  
pp. 679-683 ◽  
Author(s):  
Shang Jiang Yu ◽  
Ji Xiang Yang ◽  
Jin Yang Chen
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Measurement ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Performance ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Hopkinson Pressure Bar ◽  
Fbg Sensor ◽  
Stable Performance ◽  
Pressure Bar

The fiber Bragg grating (FBG) sensor is the most appropriate to measure strain of concrete. Employing a specifically designed FRP package, a FBG sensor for concrete dynamic strain measurement was designed. To interrogate the dynamic response of the FBG sensor, the corresponding interrogator was developed by using a novel reflect wavelength measurement method. A series of tests such as measuring dynamic strain of concrete specimens impacted with drop hammer and split Hopkinson pressure bar (SHPB) were conducted. The results show that the sensor and its interrogator respond rapidly to impact and have a stable performance. The system can be used for a real-time and rapid dynamic strain measurement in concrete dynamic performance tests or weapons effects tests.

An Embedded FBG Sensor for Dynamic Strain Measurement for a Clamped-Clamped Composite Structure

2005 ◽  
Vol 295-296 ◽  
pp. 21-26 ◽  
Author(s):  
Hang Yin Ling ◽  
Alan Kin Tak Lau ◽  
Li Cheng ◽  
J. Wei ◽  
R.S. Thomson ◽  
...  
Keyword(s):  
Strain Gauge ◽  
Strain Measurement ◽  
Composite Structures ◽  
Longitudinal Strain ◽  
Mechanical Performance ◽  
Fibre Composite ◽  
Excitation Frequency ◽  
Vibration Monitoring ◽  
Dynamic Strain ◽  
Fbg Sensor

A comparison of strain measurement results, from an embedded fibre-optic Bragg grating (FBG) sensor and surface mounted strain gauge, at different vibration frequency ranges and using a clamped-clamped glass fibre composite beam, is presented. It is shown that the FBG sensor is able to precisely measure the peaks at the first-two natural frequency modes compared with the spectrum captured from the strain gauge. The results also demonstrate that the strains measured from the FBG sensor agreed well with the strain gauge at frequencies below 100 Hz. Beyond this value, the actual strain on the beam surface was less than 3µe, and the data extracted from the strain gauge are no longer valid. For a clamped-clamped structure, the longitudinal strain of the beam correlates to its vibration amplitude and excitation frequency. Increasing the frequency results in decreasing the longitudinal strain of the beam and erroneous measurements from the strain gauge resulted. This study provides important information on the feasibility of using embedded FBG sensors as vibration monitoring devices to measure mechanical performance of composite structures.

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.

Strain measurement of steel structure using a novel FBG sensor packaged by titanium alloy slice

2005 ◽  
Author(s):  
Xiujuan Yu ◽  
Youlong Yu ◽  
Yanbiao Liao ◽  
Min Zhang ◽  
Shurong Lai
Keyword(s):  
Titanium Alloy ◽  
Strain Measurement ◽  
Steel Structure ◽  
Fbg Sensor
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