- 标题
- 摘要
- 关键词
- 实验方案
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[IEEE 2017 IEEE Workshop on Recent Advances in Photonics (WRAP) - Hyderabad (2017.12.18-2017.12.19)] 2017 IEEE Workshop on Recent Advances in Photonics (WRAP) - Differential Pressure Sensor Using Integrated Optical MEMS and Double Ring Resonator
摘要： In this work, we designed and simulated a differential pressure sensor using a double ring resonator with radius 5μm and 4μm placed on the fixed of a cantilever beam with dimensions 100μm x 30μm x 5μm. The stress induced on the cantilever changes the refractive index in the waveguide which results in the shift of the resonant wavelength. A sensitivity of 15.544pm/kPa is achieved. The sensor is operated at wavelength equal to 1.55μm and can be used for aircraft, medicine and automobile.
关键词： Cantilever beam,Opto-mechanical effect,Differential pressure sensor,Double ring resonator
更新于2025-09-23 15:22:29
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Energy harvesting properties of the functionally graded flexoelectric microbeam energy harvesters
摘要： Flexoelectricity may be an excellent candidate for piezoelectricity in micro and nano scaled energy harvesters due to its strong size dependency. In this paper, a size dependent analytical model of the cantilever-based functionally graded flexoelectric energy harvesters is developed. The Hamilton’s principle is used to derive the governing equations. By means of the Galerkin’s method, the approximated closed-form solutions of electrical output and energy conversion efficiency are obtained. For the functionally graded flexoelectric energy harvester, the effective flexoelectric response is controlled by not only the flexocoupling coefficient but also its first derivative. Numerical results of a 3μm-thick Polyvinylidene Fluoride/ Strontium Titanate composed functionally graded flexoelectric energy harvester demonstrate that when the volume fraction exponent varies from zero to infinity, the optimal working frequency gradually reduces from 41407Hz to 7761Hz and the optimal load resistance gradually increases from 0.99MΩ to 83.91 MΩ. Meanwhile, shrinking the thickness from 3μm to 0.3μm will highly increase the normalized power density and the energy conversion efficiency about one and two orders, respectively. Moreover, when the strain gradient elastic coefficient becomes larger, the natural frequency will increase while the corresponding maximum electrical output will decrease.
关键词： Functionally graded materials,Flexoelectric effect,Cantilever beam,Strain gradient elastic effect,Energy harvesters
更新于2025-09-23 15:22:29
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A Complete System Modelling of Piezoelectric Energy Harvester (PEH) with Silicon Carbide (SiC) Used as Cantilever Base
摘要： Silicon carbide (SiC) is a material that possesses hardness and robustness to operate under high temperature condition. This work is a pilot in exploring the feasibility of cubic piezo element on the SiC wafer with integrated proof mass as horizontal cantilever with perpendicular displacement with respect to the normal plane. With the advance of electronic circuitry, the power consumption is reduced to nano-watts. Therefore, harvesting ambient energy and converting into electrical energy through piezoelectric material will be useful for powering low power devices. Resonance is a property which able to optimize the generated output power by tuning the proof masses. The damping ratio is a considerable parameter for optimization. From analytical study, small damping ratio will enhance the output power of the piezoelectric energy harvester (PEH). This paper will present mathematical modelling approach, simulation verification and the conditional circuit named versatile precision full wave rectifier.
关键词： Silicon carbide,optimization,analytical modelling,cantilever beam,piezoelectric
更新于2025-09-23 15:22:29
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Theoretical and experimental study on optical fiber microseismic accelerometer based on cantilever beam structure
摘要： According to the characteristics of underground environment and microseismic signal in coal mine, a kind of optical fiber microseismic accelerometer based on cantilever beam structure is put forward in this paper, and its mechanical model is established, its sensitivity is analyzed, and tested by B&K shaking table test system. The experimental results show that the frequency response range of the sensor is 10Hz-100Hz, which meets the requirements of microseismic test.
关键词： FBG,accelerometer,microseismic,cantilever beam,frequency response
更新于2025-09-16 10:30:52
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Overhead Transmission Line Tensiometer on Insulator String Based on Fiber Bragg Grating
摘要： This paper proposes an overhead transmission line tensiometer on insulator string based on fiber Bragg grating and cantilever beam. According to simulation and experiment, the tensiometer is suitable for overhead transmission line breakage warning.
关键词： tensiometer,fiber Bragg grating,cantilever beam
更新于2025-09-16 10:30:52
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A novel methodology for spark gap monitoring in Micro-EDM using optical fiber Bragg grating
摘要： Micro-Electric Discharge Machining (Micro-EDM) are the most considerable micro-manufacturing process used to engineer miniaturized features on any high temperature resistive hard material. The machining parameters in Micro-EDM are very stochastic in nature. The spark gap measure acts as a vital parameter that correlates with other process parameters for enhancement of Material Removal Rate (MRR) in Micro-EDM. Real-time actual measurement of spark gap between the electrodes is highly challenging and is limited due to the small gap measure. The present work is on development of a novel sensing technique for spark gap measurement, based on a Fiber Bragg Grating (FBG) sensor. The sensing system is developed on a cantilever structure bonded with the FBG sensor, for determining accurate spark gap measure with displacement measurement of the tool electrode. The deflection on the cantilever during spark gap generation is translated into strain variations monitored by the FBG bonded over it. Experimental trials are conducted on Micro-EDM set-up with the cantilever beam based displacement sensing with a sensitivity of 10 μm/pm. Real-time spark gap data obtained by FBG are in the range of 1.1-18.6 μm and are validated against a precision measuring instrument. This sensing technology employed for Micro-EDM spark gap measurement establishes a novel technique in micromachining field and formulates a smart system.
关键词： Cantilever beam structure,Micromachining,Spark gap,Fiber optics,Micro-EDM,Bragg Gratings
更新于2025-09-12 10:27:22
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Effect of elastic modulus of cantilever beam on the performance of unimorph type piezoelectric energy harvester
摘要： Piezoelectric energy harvesting is a technique that can utilize ambient vibration energy to generate useful electrical energy, which is promising for powering small-scale autonomous devices such as sensors for wearable, biomedical, and industrial applications. Typically, cantilever-type piezoelectric energy harvesters (PEHs) are operated under resonance condition to achieve the maximum output power at low frequency stimuli. Along with resonance matching, it is also necessary to optimize the PEH configuration with high electromechanical properties for the efficient energy conversion. The purpose of this study is to investigate the effect of the elastic modulus of the passive layer in the cantilever structured PEH on the electromechanical properties and thus harvesting performance. In this regard, two unimorph type PEHs having the identical geometry, piezoelectric properties, and proof mass but with different elastic modulus (55 GPa and 97 GPa) of Ti alloy-based passive layers were fabricated and their output performance was compared under the same acceleration amplitude excitation stimuli. The PEH with the smaller elastic modulus passive layer exhibited almost 53% improvement in the maximum power than that with the higher elastic modulus passive layer, which is attributed to a smaller mechanical damping ratio, higher quality factor, and larger vibration amplitude.
关键词： vibration energy,piezoelectric energy harvesting,cantilever beam,elastic modulus,unimorph type
更新于2025-09-04 15:30:14