Modeling of Light Intensity-Modulated Fiber-Optic Displacement Sensors

2011 ◽  
Vol 60 (4) ◽  
pp. 1408-1415 ◽  
Author(s):  
Panagiotis Polygerinos ◽  
Lakmal D. Seneviratne ◽  
Kaspar Althoefer
Keyword(s):  
Light Intensity ◽  
Fiber Optic ◽  
Intensity Modulated ◽  
Displacement Sensors

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.

An intensity modulated fiber-optic carbon monoxide sensor based on Ag/Co-MOF in-situ coated thin-core fiber

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Lian Wang ◽  
Juncheng Zhou ◽  
Yuhao Chen ◽  
Liu Xiao ◽  
Guojia Huang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Monoxide ◽  
Photoelectron Spectroscopy ◽  
Fiber Optic ◽  
Temperature Stability ◽  
Single Mode ◽  
X Ray ◽  
Intensity Modulated ◽  
Core Fiber

Abstract An intensity modulated fiber-optic carbon monoxide (CO) sensor by integrating in-situ solvothermal-growth Ag/Co-MOF sensing film is fabricated and evaluated. The Michelson interference sensing structure is composed of single-mode fiber (SMF), enlarged taper, thin-core fiber (TCF), and Ag film as the reflector. Ag/Co-MOF was coated on the cladding of the TCF as the sensing material, and the enlarged taper is located between TCF and SMF as the coupler. The structure, morphology, compositions and thermal stability of the Ag/Co-MOF sensing film were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), etc. The sensitivity of the sensor is 0.04515 dB/ppm, and the fitting parameter of the CO concentration is 0.99876. In addition, the sensor has the advantages of good selectivity, good signal and temperature stability, and it has potential application in trace CO detection.

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.

Design and Analysis of a 6-DOF Monolithic Nanopositioning Stage

2010 ◽  
Vol 437 ◽  
pp. 61-65 ◽  
Author(s):  
Ling Li Cheng ◽  
Jian Wei Yu ◽  
Xiao Fen Yu
Keyword(s):  
Mathematical Model ◽  
Finite Element Method ◽  
Optimization Problem ◽  
Fiber Optic ◽  
Piezoelectric Actuators ◽  
Flexure Hinge ◽  
Constraint Optimization ◽  
The Finite Element Method ◽  
Displacement Sensors ◽  
Final Design

A 6-DOF monolithic nanopositioning stage is developed for three coordinate measuring machines (CMM) with nanometer resolution. The stage consists of a monolithic flexure hinge mechanism, six piezoelectric actuators and six fiber-optic displacement sensors. A mathematical model of the constraint optimization problem is presented. Based on the solution of the optimization problem, the final design of the 6-DOF stage is also presented. The numerical analysis on static and dynamic behavior of the stage is done by using the finite element method. The experimental results of the performance of the 6-DOF stage are presented.

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