Novel piezoelectric structures for sensor applications

Holmes, J.E.R.; Pearce, D. H.; Button, Tim W.

doi:10.1016/s0955-2219(00)00228-4

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…For a capacitance in the pico-Farad range, it can be seen that the detectable acceleration will be on the order of m/s , or . The sensitivity of this device is therefore unmatched among all the known types of acceleration sensors [22]- [25]. Fig.…”

Section: B Sensing Of Vibrationsmentioning

confidence: 99%

Ultrahigh-Sensitivity Pressure and Vibration Sensor

Bakhoum

Cheng

2011

IEEE Sensors J.

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A novel new ultrahigh-sensitivity pressure and vibration sensor is introduced. The sensor is based on the concept of using a variable ultracapacitor rather than a variable capacitor as a transduction mechanism. The variable ultracapacitor assembly consists of two electrodes on which carbon nano-tubes of a length of 20 m are grown. One electrode is fixed and is fully immersed in the electrolyte, while the other electrode is movable and is positioned outside of the electrolyte. In response to pressure or vibration, an extremely small displacement of 20 m (less than the width of a human hair) submerges the movable electrode into the electrolyte and results in a substantially large variation in capacitance (from zero to 54 F in the present prototype).Index Terms-High-sensitivity transducer, pressure sensor, variable ultracapacitor, vibration sensor.

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Section: B Sensing Of Vibrationsmentioning

confidence: 99%

Ultrahigh-Sensitivity Pressure and Vibration Sensor

Bakhoum

Cheng

2011

IEEE Sensors J.

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“…Therefore, it is a kind of economical geophone with good performance, which has been widely used in marine seismic exploration [9,10]. However, the low frequency cut-off frequency of the piezoelectric ceramic geophone is higher (about 10 Hz) than some geophones such as electrochemical geophone, which can't meet the needs of future seismic exploration [11,12].…”

Section: Introductionmentioning

confidence: 99%

Preparation of PVDF/TiO₂ nanofibers with enhanced piezoelectric properties for geophone applications

Zhu

Sun

Yang

et al. 2019

Smart Mater. Struct.

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For deep seismic detection, a geophone with high sensitivity to low frequency seismic signals is needed. In this work, polyvinylidene fluoride (PVDF)/TiO 2 nanofibers with enhanced piezoelectric properties have been electrospun and applied on the geophone for increasing the sensitivity of sensing unit. The nanofibers were characterized by scanning electron microscopy and transmission electron microscopy, x-ray diffraction spectra (XRD) and fourier transform infrared spectroscopy (FTIR). According to (XRD) and (FTIR), electrospinning method and doping of titanium dioxide particles promote the orderly arrangement of molecules and increase the β polymorph. Moreover, a sensing unit with spiral cantilever beam for further improving the sensitivity and low frequency response was fabricated and the spiral cantilever beam was optimized by simulation. Afterwards, a geophone with the sensing unit was assembled and tested under absolute calibration system. The results show that sensitivity of the sensing unit itself without circuit can be up to 144 mV m −1 s −2 . Such a strong raw signal will meet the needs of geophone with high signal-to-noise ratio for deep exploration. Furthermore, its low frequency cut-off frequency is 3 Hz, which are superior to the conventional geophone based on piezoelectric ceramic.

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“…Studies reported by Su et al (2001), Holmes et al (1998Holmes et al ( , 1999Holmes et al ( , 2000, and Pearce et al (2002a,b) developed a viscous processing technology that is used for the manufacture of net-shaped piezoelectric ceramic actuators. Various coiled ceramic actuator configurations have been proposed, manufactured, and tested, including two configurations of coiled bimorph actuators presented by Dancila and Armanios (1998), the linear spiral and the helicoidal bimorph.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Active Flap Using Coiled Bender Piezoelectric Actuators

Vasilescu

Dancila

2004

Journal of Intelligent Material Systems and Structures

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The applicability and effectiveness of three novel piezoelectric coiled bender actuators to deflect a plain trailing edge flap on a straight wing in the presence of incompressible flow airloads is investigated in this paper through analytical modeling. This work builds upon previous research in which the three actuator configurations, the linear spiral type, the helicoidal type, and the hybrid type, have been proposed and analytically modeled, and the first two configurations have been experimentally validated. A simple analytical model for the piezoelectrically actuated flap is developed and used for this investigation. Results show that the use of coiled piezoelectric actuators for flap deflection is an effective approach. The variation of flap deflection angles with applied actuation voltage and wing angle of attack is also shown, together with performance envelopes.

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Novel piezoelectric structures for sensor applications

Cited by 7 publications

References 2 publications

Ultrahigh-Sensitivity Pressure and Vibration Sensor

Ultrahigh-Sensitivity Pressure and Vibration Sensor

Preparation of PVDF/TiO₂ nanofibers with enhanced piezoelectric properties for geophone applications

Modeling and Analysis of Active Flap Using Coiled Bender Piezoelectric Actuators

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Novel piezoelectric structures for sensor applications

Cited by 7 publications

References 2 publications

Ultrahigh-Sensitivity Pressure and Vibration Sensor

Ultrahigh-Sensitivity Pressure and Vibration Sensor

Preparation of PVDF/TiO2 nanofibers with enhanced piezoelectric properties for geophone applications

Modeling and Analysis of Active Flap Using Coiled Bender Piezoelectric Actuators

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Preparation of PVDF/TiO₂ nanofibers with enhanced piezoelectric properties for geophone applications