Double-L Cantilever-Based Fiber Bragg Grating Accelerometer

Parida, Om Prakash; Thomas, Jineesh; Nayak, Jagannath; Asokan, S.

doi:10.1109/jsen.2019.2936463

Cited by 44 publications

(8 citation statements)

References 19 publications

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“…One of the most common optical fiber-based approaches for accelerometers development is the integration of FBGs in mechanical structures [ 144 ]. In this context, many different approaches using single [ 145 ] and double [ 146 ] cantilevers, as well as diaphragm [ 147 ] and flexible hinge [ 148 ] structures, were proposed. This approach is based on the strain produced in the FBG, due to the inertial displacement of the proof mass under acceleration [ 149 ].…”

Section: Sensors For Navigationmentioning

confidence: 99%

Multifunctional Integration of Optical Fibers and Nanomaterials for Aircraft Systems

2023

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Smart sensing for aeronautical applications is a multidisciplinary process that involves the development of various sensor elements and advancements in the nanomaterials field. The expansion of research has fueled the development of commercial and military aircrafts in the aeronautical field. Optical technology is one of the supporting pillars for this, as well as the fact that the unique high-tech qualities of aircrafts align with sustainability criteria. In this study, a multidisciplinary investigation of airplane monitoring systems employing optical technologies based on optical fiber and nanomaterials that are incorporated into essential systems is presented. This manuscript reports the multifunctional integration of optical fibers and nanomaterials for aircraft sector discussing topics, such as airframe monitoring, flight environment sensing (from temperature and humidity to pressure sensing), sensors for navigation (such as gyroscopes and displacement or position sensors), pilot vital health monitoring, and novel nanomaterials for aerospace applications. The primary objective of this review is to provide researchers with direction and motivation to design and fabricate the future of the aeronautical industry, based on the actual state of the art of such vital technology, thereby aiding their future research.

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Section: Sensors For Navigationmentioning

confidence: 99%

Multifunctional Integration of Optical Fibers and Nanomaterials for Aircraft Systems

2023

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“…In earlier studies, researchers typically used Fiber Bragg gratings as sensing elements for Bragg grating accelerometers, which were attached to stress concentration points on mechanical structures by glue or other fixtures. The different mechanical structures were employed to construct Fiber Bragg grating accelerometers, such as cantilever beams, [34][35][36][37] curved beams, [38,39] flexible cylinders, [40][41][42] and diaphragm structures, [43][44][45] which are presented in Figure 9.…”

Section: Bragg Gratings Accelerometermentioning

confidence: 99%

Optical Interferometric MEMS Accelerometers

Zhao,

Qi,

Wang

et al. 2023

Laser & Photonics Reviews

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Laser interferometry is one of the most accurate measurement technologies whose displacement resolution can reach the femtometer (fm) level. With the development of Micro‐Electro‐Mechanical Systems(MEMS) technology, many excellent optical interferometric MEMS sensors have emerged, which play an essential role in intelligent manufacturing, aerospace, and many other fields. Among them, optical interferometric MEMS accelerometers develop rapidly due to their high sensitivity, low noise, and anti‐electromagnetic interference advantages. Lots of research in optical interferometric chip design, micro‐nano fabrication process, signal demodulation algorithm, and range extension technology are performed, and different types of MEMS accelerometers based on the optical interferometric principles are developed, which have been demonstrated and applied in the fields of disaster monitoring, equipment operation and maintenance, and resource exploration. This paper reviews the development status of optical interferometric MEMS accelerometers, mainly focusing on the critical problems and solutions that need to be solved in the development process of optical interferometric accelerometers, and finally introduces the typical application scenarios.

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“…When external vibration occurs, the sensor as a whole will move with the vibration signal 13 , and its acceleration will produce opposite inertial force on the mass block which will then vibrate up and down with inertial force, to drive the L-shaped beam to rotate around the bearing, and transform the vibration of the mass block into uniform strain of grating, thus affecting the center wavelength of its reflected light. The drift of the reflected light center wavelength is proportional to the linear displacement of the mass block and also proportional to the acceleration.…”

Section: Structural Design and Theoretical Analysis Of The Sensormentioning

confidence: 99%

A new L-shaped rigid beam FBG acceleration sensor

Teng

Wang

Tang

et al. 2022

Sci Rep

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Acceleration detection is an important technology in the fields of seismic monitoring, structural health monitoring and resource exploration. A FBG acceleration sensor with the combination of L-shaped rigid beam and spring structure based on bearings is proposed against the low sensitivity that predominates in the low-frequency vibration measurement by FBG acceleration sensors, where L-shaped rigid beam is utilized to amplify the vibration signal, and is fixed by the bearings at both ends to effectively suppress the transverse crosstalk. The effects of structural parameters on the sensitivity and natural frequency of the sensors were analyzed using Origin theory, and such parameters were optimized; next, static stress and modal simulation analysis was made using COMSOL; in the end, a test system was built to test the performance of the real sensors. According to the findings, the acceleration sensor, whose natural frequency is 57 Hz, is of a flat sensitivity response in the low frequency range of 1–35 Hz, with the dynamic range being 89.83 dB, the acceleration sensitivity being up to 1241.85 pm/g, the coefficient of determination R2 for the sensitivity fit is 0.9997, and the transverse crosstalk being -26.20 dB within the operating frequency band. The findings offer a reference for improving the low-frequency vibration measurement capability of FBG acceleration sensors.

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Double-L Cantilever-Based Fiber Bragg Grating Accelerometer

Cited by 44 publications

References 19 publications

Multifunctional Integration of Optical Fibers and Nanomaterials for Aircraft Systems

Multifunctional Integration of Optical Fibers and Nanomaterials for Aircraft Systems

Optical Interferometric MEMS Accelerometers

A new L-shaped rigid beam FBG acceleration sensor

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