High-Resolution Fiber Optic Sensor based on Coated Linearly Chirped Bragg Grating

Optik ◽  
2020 ◽  
Vol 212 ◽  
pp. 164698
Author(s):  
Mandeep Singh ◽  
Sanjeev Kumar Raghuwanshi ◽  
Om Prakash ◽  
Pankaj Kumar Saini
Keyword(s):  
High Resolution ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Bragg Grating ◽  
Optic Sensor

High-resolution absolute frequency referenced fiber optic sensor for quasi-static strain sensing

2010 ◽  
Vol 49 (21) ◽  
pp. 4029 ◽  
Author(s):  
Timothy T.-Y. Lam ◽  
Jong H. Chow ◽  
Daniel A. Shaddock ◽  
Ian C. M. Littler ◽  
Gianluca Gagliardi ◽  
...  
Keyword(s):  
High Resolution ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Strain Sensing ◽  
Absolute Frequency ◽  
Static Strain ◽  
Optic Sensor

Two-dimension fiber optic sensor for high-resolution and long-range linear measurements

2010 ◽  
Vol 158 (1) ◽  
pp. 43-50 ◽  
Author(s):  
A. Khiat ◽  
F. Lamarque ◽  
C. Prelle ◽  
Ph. Pouille ◽  
M. Leester-Schädel ◽  
...  
Keyword(s):  
High Resolution ◽  
Long Range ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Linear Measurements ◽  
Two Dimension ◽  
Optic Sensor

scholarly journals High-Resolution FBG-Based Fiber-Optic Sensor with Temperature Compensation for PD Monitoring

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5285 ◽  
Author(s):  
Mohsen Ghorat ◽  
Gevork B. Gharehpetian ◽  
Hamid Latifi ◽  
Maryam A. Hejazi ◽  
Mehdi Bagheri
Keyword(s):  
High Resolution ◽  
Temperature Compensation ◽  
Fiber Optic ◽  
Partial Discharge ◽  
Signal Strength ◽  
Fiber Optic Sensor ◽  
Power Transformers ◽  
Wavelength Shift ◽  
Physical Parameters ◽  
Optic Sensor

This paper presented a new sensor to detect and localize partial discharge (PD) in power transformers based on a fiber Bragg grating (FBG). The fundamental characteristics of the proposed sensor, as a PD detector, were temperature compensation and direction independence. The proposed high-resolution PD detector operated based on the FBG wavelength shift. It is necessary to evaluate the physical parameters of the sensor to achieve the best results. Therefore, in this paper, the detected signal strength was investigated for different angles and temperatures. A Teflon hollow mandrel and two FBGs attached to the inner and outer surfaces of the hollow mandrel were chosen as the inner transformer PD detector. The changes in the sensor output were less than 0.4 mV and 0.5 mV for direction variations and a temperature variation of 14 °C (degrees Celsius), respectively. Consequently, the proposed sensor could be successfully employed for the detection of a transformer PD signal.

Metrological Performances of Smart Structures Based on Bragg Grating Sensors

2011 ◽  
Vol 495 ◽  
pp. 41-44
Author(s):  
Enrico De Cais ◽  
Marco Borotto ◽  
Marco Belloli ◽  
Andrea Bernasconi ◽  
Stefano Manzoni
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Bragg Grating ◽  
Strain Gages ◽  
Light Spectrum ◽  
Bending Tests ◽  
Measurement Systems ◽  
Optic Sensor ◽  
Fbg Sensors

The fiber optic Bragg grating (FBG) sensors have been recently introduced: they presenta photo-record grating on the fiber itself, which allows the reflection of a certain wavelength of theinput light spectrum. The applied strain is estimated based on changes of the reflected wavelength.The metrological characteristics of FBGs have been tested and compared to strain gages ones, whichrepresent the actual reference measurement systems. It was decided to integrate the measurementsystem directly into a composite material, having achieved good results during the static and dynamictests [1]. We made carbon fiber specimens (two for traction and two for bending tests) with FBGsintegrated into them. The results were surprising: the integration of ``nude'' fiber optic sensor didnot cause damage or deterioration in the quality of measurement, the signal noise was maintained atbaseline levels and response to dynamic stress was definitely comparable to that offered by electricalstrain gauges

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