scholarly journals Fiber Optic Vibration Sensors

2021 ◽  
Author(s):  
Putha Kishore ◽  
Dantala Dinakar ◽  
Manchineellu Padmavathi
Keyword(s):  
Optical Fiber ◽  
Measurement Method ◽  
Fiber Optic ◽  
Sensor Response ◽  
Vibration Sensor ◽  
Vibration Measurement ◽  
Sensor Design ◽  
Plastic Optical Fiber ◽  
Intensity Modulated ◽  
Vibration Sensors

The sensors presented in this chapter are fiber optic intensity modulated vibrations sensors which are non-contact (extrinsic sensor) to the vibrating object. Three sensors presented make use of non-contact vibration measurement method with plastic fiber using distinct designs, improvement of the sensor response and advantages of one sensor over the other for diverse applications. First discussed about dual plastic optical fiber vibration sensor design and its response. Secondly, discussed about 1x2 fused coupler plastic optical fiber vibration sensor design with advantages over the first one. Finally, discussed about the 2x2 fused coupler plastic optical fiber vibration sensor design along with advantages than other two methods. At the end reported the final results with comparison.

Study on Non-Contact Optical Vibration Senor

2013 ◽  
Vol 433-435 ◽  
pp. 233-236
Author(s):  
Ke Xue Sun ◽  
Xian Jun Li ◽  
Man Li ◽  
Qing Yun Yan ◽  
Xie Feng Cheng ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Sensor ◽  
Fiber Optic ◽  
Low Cost ◽  
Measurement Range ◽  
High Accuracy ◽  
Vibration Sensor ◽  
Vibration Measurement ◽  
Good Reliability ◽  
Optical Vibration

The vibration measurement is one of the new application in the optical sensor. This paper studies a new non-contact optical vibration sensor, and implements the Optical fiber vibration sensor based on FPGA. The totally available measurement range arrived over 300um, and the accuracy of 0.1 um can be obtained . This fiber optic vibration sensor has a low cost, good reliability, and high accuracy measurements.

Vibration Control of Smart Composite Beams with Embedded Optical Fiber Sensor and ER Fluid

1999 ◽  
Vol 121 (4) ◽  
pp. 508-509 ◽  
Author(s):  
Jinsong Leng ◽  
A. Asundi ◽  
Yanju Liu
Keyword(s):  
Optical Fiber ◽  
Vibration Control ◽  
Composite Beam ◽  
Fiber Optic ◽  
Vibration Sensor ◽  
Fiber Optic Sensor ◽  
Smart Composite ◽  
Intensity Modulated ◽  
Er Fluids ◽  
Er Fluid

This paper proposes the use of a fiber optic sensor (FOS) and electrorheological (ER) fluid actuator for vibration monitoring of smart composite structures. A new intensity modulated fiber optic vibration sensor is developed following the face coupling theory. It has high sensitivity similar to the traditional piezoelectric sensor. Also it is lower in cost. The experiment of vibration control of smart composite beam with embedded intensity modulated optical fiber vibration sensor and ER fluids are described in this paper. It is noted that the most significant change in the structural properties of smart composite beam is the change of structural damping and natural frequency, which varies with the electric field intensity imposed upon ER fluid. So the structural vibration can be monitored and controlled effectively utilizing FOS and ER fluids.

A novel sensor design for displacement measurement using plastic optical fiber-based on face-coupling method

2021 ◽  
Vol 67 ◽  
pp. 102684
Author(s):  
Abdul Ghaffar ◽  
Qi Li ◽  
Irfan Mehdi ◽  
Khadija Abro ◽  
Navera Karim ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Displacement Measurement ◽  
Coupling Method ◽  
Sensor Design ◽  
Plastic Optical Fiber

scholarly journals A Fiber Bragg Grating Based Torsional Vibration Sensor for Rotating Machinery

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2669 ◽  
Author(s):  
Jingjing Wang ◽  
Li Wei ◽  
Ruiya Li ◽  
Qin Liu ◽  
Lingling Yu
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Torsional Vibration ◽  
Electromagnetic Interference ◽  
Vibration Sensor ◽  
Vibration Measurement ◽  
Bragg Grating ◽  
Structural Parameter ◽  
Measurement Sensitivity ◽  
Fiber System

This paper proposes a new type of torsional vibration sensor based on fiber Bragg grating (FBG). The sensor has two mass ball optical fiber systems. The optical fiber is directly treated as an elastomer and a mass ball is fixed in the middle of the fiber in each mass ball fiber system, which is advantageously small, lightweight, and has anti-electromagnetic interference properties. The torsional vibration signal can be calculated by the four FBGs’ wavelength shifts, which are caused by mass balls. The difference in the two sets of mass ball optical fiber systems achieves anti-horizontal vibration and anti-temperature interference. The principle and model of the sensor, as well as numerical analysis and structural parameter design, are introduced. The experimental conclusions show that the minimum torsional natural frequency of the sensor is 27.35 Hz and the torsional vibration measurement sensitivity is 0.3603 pm/(rad/s2).

A Design Technique and Structure for Optical Fibre Vibration Sensor

2014 ◽  
Vol 687-691 ◽  
pp. 3462-3465
Author(s):  
Ke Xue Sun ◽  
Xian Jun Li ◽  
Shao Fang Zhang ◽  
Hao Zheng
Keyword(s):  
Optical Fiber ◽  
Optical Fibre ◽  
High Reliability ◽  
Vibration Sensor ◽  
Design Technique ◽  
Vibration Sensors ◽  
Working Principle ◽  
Optical Vibration

This paper reviewed techniques of vibration sensors, studied structure and working principle of phase modulated optical fiber vibration sensor, and designed a new structure of non-contact optical vibration sensor. Use this structure, expect accuracy of 0.1um can be obtained in the range of 1mm. At the same time, this system is simple, anti-interference ability, high reliability and ease of practical.

A simple 1×2 plastic optical fiber coupler based vibration sensor

2013 ◽  
Author(s):  
Kishore P. ◽  
Dinakar D. ◽  
Srimannarayana K. ◽  
Vengal Rao P.
Keyword(s):  
Optical Fiber ◽  
Vibration Sensor ◽  
Plastic Optical Fiber ◽  
Optical Fiber Coupler ◽  
Fiber Coupler

Performance Evaluation of Scintillation Fiber-Optic Dosimeter for Measuring High-Energy Photon Beams

2011 ◽  
Vol 378-379 ◽  
pp. 701-705
Author(s):  
Wook Jae Yoo ◽  
Kyoung Won Jang ◽  
Jin Soo Moon ◽  
Ki Tek Han ◽  
Bong Soo Lee ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Ionization Chamber ◽  
Fiber Optic ◽  
High Energy ◽  
High Energy Photon ◽  
Plastic Optical Fiber ◽  
Photon Beams ◽  
Energy Photon ◽  
Measuring Device ◽  
Radiotherapy Dosimetry

In this study, we have fabricated a fiber-optic dosimeter using an organic scintillator and a plastic optical fiber for measuring percentage depth doses with radiotherapeutic high energy photon beams. The scintillating light generated in an organic dosimeter probe embedded in a solid water phantom is guided by a plastic optical fiber to the light-measuring device. Using this fiber-optic dosimeter, percentage depth doses are measured with 6 and 15 MV energies of photon beams whose field sizes are 2 x 2 and 10 x 10 cm2, and the results are compared with those measured using conventional dosimeters such as an ionization chamber and EBT films used in radiotherapy dosimetry.

scholarly journals Performance, Flexibility and Usability Enhancement of the Fiber Optic Vibration Sensor

2021 ◽  
Author(s):  
Vít Novotný ◽  
Karel Slavíček ◽  
Petr Sysel ◽  
Aleš Prokeš ◽  
Pavel Hanák
Keyword(s):  
Fiber Optic ◽  
Optical Switches ◽  
Vibration Sensor ◽  
Fiber Sensor ◽  
Performance Parameters ◽  
Coherent Light ◽  
Fiber Sensors ◽  
Rayleigh Backscattering ◽  
Vibration Sensors ◽  
Application Potential

Distributed fiber optic vibration sensors based on Φ-OTDR using Rayleigh backscattering of highly coherent light source pulses are very popular type in the area of sensors due to many attractive features, mainly due to its distributed manner of sensing, i.e. they can operate as thousands of local sensors simultaneously. The paper summarizes and describes several important modifications of the original sensor scheme to enhance its key performance parameters and to extend its application potential. A multi-fiber sensor form was proposed. Single- and two-fiber sensors were designed, constructed and tested both in the laboratory and in a real environment. Variants of two-fiber sensor utilizing optical switches for the sensor flexibility enhancement are proposed and their applications are described.

Design of Optical Fiber MEMS Displacement Sensor

2013 ◽  
Vol 312 ◽  
pp. 766-770
Author(s):  
Xiao Long Li ◽  
Jian Gan Wang ◽  
Ya Ming Wu
Keyword(s):  
Light Intensity ◽  
Optical Fiber ◽  
Fiber Optic ◽  
Single Mode ◽  
Theory Model ◽  
Displacement Sensor ◽  
Vibration Displacement ◽  
Optical Lens ◽  
Intensity Modulated ◽  
Sensor Field

Introducing a new intensity modulated optic microphone theory model, it can be used in infrasound sensor field. Single-mode optical fiber to transmit and receive light and optical lens to collimate is used to realize light intensity modulation, the system also contains MEMS membrane to be compatible with vibration displacement. Through the analysis of membrane size and the change of pressure, the related parameters about the sensitivity of fiber optic displacement sensor could be acquired. Simulation results show that the proper choice of parameters can make the sensitivity of sensor improve in orders of magnitude than traditional light intensity modulated methods.

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