Polymer optical fiber Bragg grating sensors: Measuring acceleration

Stefani, Alessio; Yuan, Wu; Andresen, Søren; Bang, Ole

doi:10.1109/acoft.2010.5929947

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…Most solutions reported are based on BTT measurement [ 52 , 53 ] as well as piezoelectric accelerometers located on the front and rear part of the engine [ 54 ], although both suffering from the small vibration magnitudes, thus hampering an accurate vibration analysis. Novel Plastic Optical Fibre FBGs (POFBGs) are also proposed, capable of measuring vibration amplitudes ranging from 1 g to 15 g with a linear response [ 55 ], although they require a complex and costly reception stage. Estimations of the instantaneous angular speed through the aircraft engine vibration signal is also a challenge [ 56 ].…”

Section: Turbine Engine Measurementsmentioning

confidence: 99%

Sensing Applications in Aircrafts Using Polymer Optical Fibres

Lallana

Aldabaldetreku

López

et al. 2021

Sensors

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We report on recent advances in the use of inexpensive polymer optical fibres (POFs) for sensing applications in avionics. The sensors analysed in this manuscript take advantage of the unique properties of polymers, such as high flexibility, elasticity, and sensitivity, and they range from strain, elongation, and vibration interrogators to level and temperature meters, leading to cost-effective techniques for structural health monitoring in aircraft structures. We also highlight recent power-supply methods using Power-over-POF in order to feed sensors remotely, and we discuss the constraints imposed by connectors on the performance of POF networks in aircrafts.

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Section: Turbine Engine Measurementsmentioning

confidence: 99%

Sensing Applications in Aircrafts Using Polymer Optical Fibres

Lallana

Aldabaldetreku

López

et al. 2021

Sensors

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“…Temperature and gas sensors have been used widely in many industrial applications. Fiber optic based grating sensor has been utilized in many functions instead of conventional sensors due to its low cost, low weight, immunity to electromagnetic field, small size and its high sensing ability to different physical parameters such as temperature [1], pressure [2], acceleration [3], force [4], strain [5], displacement [6], high magnetic field [7] and chemical application [8]. Therefore, Fiber Bragg Grating FBG (few of hundred micrometers grating periods) and Long Period Fiber Grating LPFG (few of hundred nanometers grating periods) have been used for sensing several measurands.…”

Section: Introductionmentioning

confidence: 99%

Bi-Functional Coated Tapered LPFG Sensor: Gas and Temperature Sensing

Alshaikhli¹,

Hekmat²,

Wang³

2022

MMEP

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A bi-functional coated tapered Long Period Fiber Grating LPFG as a gas and a temperature sensor is proposed. Obtains a sensor with a high sensitivity is still a matter of challenge. In this work, a taper LPFG is used for sensing purposes. Besides, in order to increase the sensor performance, numbers of Cr and Al layers are coated on the taper region. In this work, different concentrations of four gases Ar, NH3, CH4 and N2 are applied for temperature range (25℃ up to 80℃). however, the experimental results illustrate that the transmission loss is reduce which means a significant interaction between sensing medium and cladding mode is occurred successfully which leads to higher sensitivity. Nevertheless, from the main findings, the temperature sensitivities are 2.9 pm/℃, 4.9 pm/℃, 4.5 pm/℃ and 3.1 pm/℃ for 4% concentrations of Ar, NH3, CH4 and N2 respectively. In addition, the gases sensitives are 0.213 nm%-1, 0.41 nm%-1, 0.39 nm%-1, 0.201 nm%-1 with limit of detection LoD of 0.061%, 0.024%, 0.032% and 0.073% for Ar, NH3, CH4 and N2 respectively. Additionally, the sensor shows a good repeatability, recoverability and stability. In terms of stability, the sensor shows a stable value of wavelength shift under different values of gas concentration and temperatures which was estimated 1.55 µm. Besides, it shows a fast responsivity with 53 s and 60 s as response time and recovery time respectively. Interestingly, with less than 0.06 nm of standard deviation, the signal returned to its original resonance wavelength which confirms that this sensor has a good recoverability. From these results, a coated taper LPFG can be a promising candidate for medical and industrial applications.

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“…This design makes it possible to carry the optoelectronic unit at a distance from several meters to a kilometer, allowing them to be used in conditions of radiation, spark-explosion-fire hazard, etc. [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Measuring Setup for Experimental Research of Two-Coordinate Fiber-Optic Acceleration Sensors with Cylindrical Lenses

Badeeva

Мурашкина

Motin

et al. 2022

Sensors

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The article presents the possibilities of using fiber-optic acceleration (FOC) sensors on products of rocket-space and aviation technology as part of information-measuring systems. A special measuring device has been developed for experimental confirmation of the main characteristics of the technical characteristics of the developed, two-coordinate fiber-optic acceleration sensors. The developed measuring setup for the experimental research of a two-coordinate fiber-optic acceleration sensor with two, cylindrical lenses fixed on two H-shaped elastic elements deflected under the influence of acceleration in two mutually perpendicular directions X and Y, intended for operation in harsh conditions of rocket and space technology. The experimental equipment consists of the developed setup for setting micromovements and an information conversion unit, including modules for signal conversion, transmission, power supply, signal amplification, and indication. Experimental dependences of the output voltage from the information conversion unit’s output on the micro-displacement in the range corresponding to the micro-displacements of the inertial mass with a cylindrical lens under acceleration in the range of ±100 m/s2 were obtained on the micro-displacement setting unit. The maximum value of the linearity error of the prototype acceleration sensor together with the information conversion unit was 0.07%. The conversion sensitivity of a two-coordinate fiber-optic acceleration sensor per the experimental dependences obtained on the Data Physics LE-612 MST/DSA 10–40 k vibration stand when exposed to sinusoidal vibration with an acceleration amplitude from 2 to 10 g in the frequency range from 5 to 2560 Hz was, on average, 3 mV/m/s2. The conducted experimental research confirms the performance of experimental samples of fiber-optic acceleration sensors together with an information conversion unit, as well as the achievement of high metrological characteristics.

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Polymer optical fiber Bragg grating sensors: Measuring acceleration

Abstract: Fiber-optical accelerometers based on polymer optical fiber Bragg gratings are reported. We have written fiber Bragg gratings for 1550 nm and 850 nm operations, characterized their temperature and strain response, and tested their performance in a prototype accelerometer.

Cited by 9 publications

References 5 publications

Sensing Applications in Aircrafts Using Polymer Optical Fibres

Sensing Applications in Aircrafts Using Polymer Optical Fibres

Bi-Functional Coated Tapered LPFG Sensor: Gas and Temperature Sensing

Measuring Setup for Experimental Research of Two-Coordinate Fiber-Optic Acceleration Sensors with Cylindrical Lenses

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