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Graphene aerogel-based vibration sensor with high sensitivity and wide frequency response range

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Nano Research 2023年第8期16卷 11342-11349页

作者： Zibo Wang Zhuojian Xiao Jie Mei Yanchun Wang Xiao Zhang Xiaojun Wei Huaping Liu Sishen Xie Weiya Zhou Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences and College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Beijing Key Laboratory for Advanced Functional Materials and Structure Research Beijing 100190China

Compared with piezoresistive sensors,pressure sensors based on the contact resistance effect are proven to have higher sensitivity and the ability to detect ultra-low pressure,thus attracting extensive research interest in wearable devices and artificial intelligence ***,most studies focus on static or low-frequency pressure detection,and there are few reports on high-frequency dynamic pressure *** by the viscoelasticity of polymers(necessary materials for traditional vibration sensors),the development of vibration sensors with high frequency response remains a great ***,we report a graphene aerogel-based vibration sensor with higher sensitivity and wider frequency response range(2 Hz–10 kHz)than both conventional piezoresistive and similar *** modulating the microscopic morphology and mechanical properties,the super-elastic graphene aerogels suitable for vibration sensing have been prepared ***,the mechanism of the effect of density on the vibration sensor’s sensitivity is studied in *** this basis,the sensitivity,signal fidelity and signal-to-noise ratio of the sensor are further improved by optimizing the structure *** developed sensor exhibits remarkable repeatability,excellent stability,high resolution(0.0039 g)and good linearity(non-linearity errorsensor can not only monitor low-frequency physiological signals and motion of the human body,but also respond to the high-frequency vibrations of rotating *** addition,the sensor can also detect static *** expect the vibration sensor to meet a wider range of functional needs in wearable devices,smart robots,and industrial equipment.

关键词： vibration sensor graphene aerogel high frequency vibration dynamic pressure detection mechanical property

Design of a Bionic Cilia MEMS three-dimensional vibration sensor

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Journal of Semiconductors 2013年第11期34卷 88-94页

作者：李振张国军薛晨阳吴淑娟 Key Laboratory of Instrumentation Science & Dynamic Measurement Ministry of Education Science and Technology on Electronic Test & Measurement Laboratory North University of China

A biomimetic three-dimensional piezoresistive vibration sensor based on MEMS technology is reported. The mechanical properties of the sensor are analyzed and the static and dynamic characteristics of the sensor are simulated by ANSYS Workbenchl2.0. The structure was made by MEMS processes including lithography, ion implantation, PECVD, etching, etc. Finally, the sensor is tested by using a TV5220 sensor auto calibration system. The results show that the lowest sensitivity of the sensor is 394.7μV/g and can reach up to 460.2 μV/g, and the dimension coupling is less than 0.6152%, and the working frequency range is 0-1000 Hz.

关键词： vibration sensor MEMS, bionic ANSYS

Study on the Non-Contact FBG vibration sensor and Its Application

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Photonic sensors 2015年第2期5卷 128-136页

作者： Tianliang LI Yuegang TAN Zude ZHOU Li CAI Sai LIU Zhongting HE Kai ZHENG Wuhan University of Technology Wuhan 430070 China

A non-contact vibration sensor based on the fiber Bragg grating （FBG） sensor has been presented, and it is used to monitor the vibration of rotating shaft. In the paper, we describe the principle of the sensor and make some experimental analyses. The analysis results show that the sensitivity and linearity of the sensor are -1.5pm/um and 4.11% within a measuring range of 2 mm- 2.6mm, respectively. When it is used to monitor the vibration of the rotating shaft, the analysis signals of vibration of the rotating shaft and the critical speed of rotation obtained are the same as that obtained from the eddy current sensor. It verifies that the sensor can be used for the non-contact measurement of vibration of the rotating shaft system and for fault monitoring and diagnosis of rotating machinery.

关键词： Rotating shaft FBG non-contact vibration sensor

Design of vibration sensor Based on Fiber Bragg Grating

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Photonic sensors 2017年第4期7卷 345-349页

作者： Zhengyi ZHANG Chuntong LIU Department Two Rocket Force University of Engineering Xi'an 710025 China

Fiber grating is a kind of new type of fiber optic light source device which has been rapidly changing in the refractive index of the core in recent years. Especially, it can realize the high precision of the external parameters by means of the special structure design and the encapsulation technology [1, 2]. In this paper, a fiber grating vibration sensor which is suitable for vibration monitoring in key areas is designed based on the technical background of vibration monitoring system. The sensor uses a single beam structure and pastes the fiber Bragg grating （FBG） to measure the vibration wavelength on the surface. When the vibration is simply harmonic vibration, the Bragg reflection wavelength will change periodically, and the periodic variation of the wavelength curve can be measured by the fiber grating demodulator, then the correctness of the experimental results is verified. In this paper, through the analysis of the data measured by the demodulator, the MATLAB software is used to verify the data, and the different frequency domains, the modes, and the phase frequency curves are obtained. The measurement range is 0Hz-100Hz, and the natural frequency is 90.6Hz.

关键词： vibration monitoring fiber Bragg grating vibration sensor modal analysis frequency domain

Etched Optical Fiber vibration sensor to Monitor Health Condition of Beam Like Structures

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Photonic sensors 2013年第2期3卷 124-130页

作者： Kishore PUTHA Dinakar DANTALA Srimannarayana KAMINENI Vengal Rao PACHAVA National Institute of Technology Warangal A.P. India

Using a center etched single mode optical fiber, a simple vibration senor is designed to monitor the vibrations of a simply supported beam. The sensor has high linear response to the axial displacement of about 0.8mm with a sensitivity of 32mV/10p, m strain. The sensor is tested for periodic and suddenly released forces, and the results are found to coincide with the theoretical values. This simple design, small in size and low cost sensor may find applications in industry and civil engineering to monitor the vibrations of the beam structures and bridges.

关键词： Optical fiber etched fiber simply supported beam vibration sensor health condition monitoring

Fiber-optic vibration sensor based on wavefront-splitting interferometry

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Fiber-optic vibration sensor based on wavefront-splitting in...

An active temperature compensated fiber Bragg grating vibration sensor for high-temperature application

20th Congress of the International Commission for Optics

作者： Hsien-Chi Yeh Chun Fan Goh Tian Fook Kong School of Mechanical ＆ Aerospace Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 School of Mechanical ＆ Aerospace Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 School of Mechanical ＆ Aerospace Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798

In this paper, we present the working principle and the preliminary results of a novel vibration sensor based on wavefront-splitting interferometry. The interference signal is formed by superposing th

关键词： Fiber-optic sensor vibration sensor Laser interferometry Displacement measurement

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Journal of Measurement Science and Instrumentation 2020年第4期11卷 397-404页

作者： CHEN Bao-jie JIA Ping-gang QIAN Jiang FENG Fei HONG Ying-ping LIU Wen-yi XIONG Ji-jun Key Laboratory of Instrumentation Science and Dynamic Measurement (North University of China) Ministry of EducationTaiyuan 030051China Science and Technology on Electronic Test&Measurement Laboratory North University of ChinaTaiyuan 030051China

An active temperature compensated fiber Bragg grating(FBG)vibration sensor with a constant section cantilever beam is proposed for the simultaneous measurement of temperature and vibration,and the sensor is verified by a temperature compensation feedback *** high-temperature vibration sensor is composed of a quartz cantilever beam and a femtosecond Bragg *** feedback control demodulation system of active temperature compensation can adjust the laser wavelength to stabilize the grating offset point and realize simultaneous measurement of temperature and *** this basis,the performance of the sensor is tested and analyzed within the range of 20-400℃by setting up a high-temperature vibration test *** experimental results show that the sensitivity of the sensor is about 132.33 mV/g,and the nonlinearity is about 3.33%.The sensitivity between the laser wavelength and temperature is about 0.01307 nm/℃.In addition,the active temperature compensated fiber Bragg grating vibration sensor has the advantages of a simple structure,stable performance,easy demodulation and high ***,the sensor can achieve high temperature vibration signal monitoring and has good practical application value.

关键词： fiber Bragg grating(FBG) vibration sensor active temperature compensation cantilever beam feedback control

Bio-inspired flexible vibration visualization sensor based on piezo-electrochromic effect

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Journal of Materiomics 2020年第4期6卷 643-650页

作者： Xuan Chen Laihui Luo Zhou Zeng Jie Jiao Mudassar Shehzad Guoliang Yuan Haosu Luo Yaojin Wang School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing210094JiangsuChina Department of Microelectronic Science and Engineering Ningbo UniversityNingbo315211China Shanghai Institute of Ceramics Chinese Academy of Sciences215 Chengbei RoadJiadingShanghai201800China

Monitoring structural vibration can provide quantitative information for both structural health evaluations and early-warning *** most classic vibration-based structural health monitoring is equipped with piezoelectric accelerometers,which is expensive and inconvenient due to cumbersome and time-consuming sensor installation and high power-consumptive data acquisition *** other main challenge with these systems is the inherent limitations for multi-point monitoring in critical elements with curvature due to their ***,inspired by the chameleon,we report a cost-effective,flexible and conformal,self-powered vibration sensor based on elasto-electro-chemical synergistic effect of piezoelectricity and *** sensor can provide not only in-situ visualization,but also ex-situ recording of structural vibration due to the non-volatile color memory effect of *** passive sensor system is composed of two distinct electronic components d ternary Pb(In1/2Nb1/2)O_(3)ePb(Mg1/3Nb2/3)O_(3)ePbTiO_(3)piezoelectric single crystal ribbon sensors and a solid-state tungsten trioxide electrochromic indicator driven by vibration-induced voltage generated by the piezoelectric *** proposed piezo-electrochromic based passive non-volatile visualization sensor may find diverse applications in structural health monitoring,smart wallpapers,and medical injury rehabilitation.

关键词： Piezoelectric Ferroelectric single crystals Flexible electronics vibration sensor Electrochromic

Low-frequency characteristics extension for vibration sensors

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Earthquake Engineering and Engineering vibration 2004年第1期3卷 139-146页

作者：杨学山高峰候兴民 Institute of Engineering Mechanics China Earthquake Administration

Traditional magneto-electric vibration sensors and servo accelerometers have severe shortcomings when used to measure vibration where low frequency components predominate.A low frequency characteristic extension for velocity vibration sensors is presented in this *** passive circuit technology,active compensation technology and the closed- cycle pole compensation technology are used to extend the measurable range and to improve low frequency characteristics of *** three types of low frequency velocity vibration sensors have been developed and widely adopted in China.

关键词： vibration sensor low frequency characteristic extension passive circuit technology active compensation technology closed-cycle pole compensation