Piezoelectric ceramic sensor (PZT) applied to electric current measurements

Júnior, M. Henrique B.; Magalhães, Amarilton L.; Bastos, A.M.; Sales, A. J. M.; Gouveia, D. X.; Kamshilin, Alexei A.; Ferreira, Alisson da Conceição; Guimarães, G. F.; Sombra, A. S. B.; Menezes, Jaileila de Araújo

doi:10.1007/s00542-018-3998-8

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…The second category is piezoelectric ceramics, such as barium titanate (BTO), − lead zirconate titanate (PZT), − modified PZT, − and modified lead titanate (PT). , They have higher dielectric constants and piezoelectricity compared to piezoelectric crystals, which enhance the performance of piezoelectric devices. However, in the field of flexible self-powered sensors, it is difficult to use piezoelectric ceramics in wearable sensing due to their rigidity and brittleness.…”

Section: Flexible Piezoelectric Self-powered Sensorsmentioning

confidence: 99%

Recent Advances in Self-powered Sensors Based on Nanogenerators: From Material and Structural Design to Cutting-Edge Sensing Applications

Ren,

Guo,

Wang

et al. 2024

ACS Appl. Electron. Mater.

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The utilization of sensors has become indispensable in the advent of an intelligent era characterized by artificial intelligence, 5G communication, big data, and other cutting-edge technologies. Traditional sensors require external power sources or batteries, resulting in a complex sensing system that does not promote the development of sustainable and environmentally friendly applications for health monitoring. In recent years, the electrical output and stability of piezoelectric, triboelectric, thermoelectric, and hybrid nanogenerators have been significantly improved, enabling their widespread role in the development of self-powered sensors. The sensors are capable of performing sensing tasks by converting their own energy, thereby obviating the need for an external power supply. In this paper, we initially explore the operating mechanisms, device materials, and structures of diverse nanogenerators and evaluate their output efficacy. Subsequently, we showcase the latest advancements in self-powered sensor systems, spanning various fields such as biomedical and healthcare, wearable devices, sound monitoring, smart vehicles, environmental monitoring, and smart cities. The paper also explores the future potential of self-powered sensor systems, in addition to discussing their practical applications.

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Section: Flexible Piezoelectric Self-powered Sensorsmentioning

confidence: 99%

Recent Advances in Self-powered Sensors Based on Nanogenerators: From Material and Structural Design to Cutting-Edge Sensing Applications

Ren,

Guo,

Wang

et al. 2024

ACS Appl. Electron. Mater.

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“…Magnetic field sensors based on the force effect on a permanent magnet have been used for current sensing. Simple devices such as [39], [40], [41], [42] suffer from poor sensitivity and poor accuracy. However, the old definition of the ampere was based on force, and the Kibble balance was a very accurate instrument.…”

Section: Othermentioning

confidence: 99%

Contactless measurement of electric current using magnetic sensors

Ripka

2019

Tm - Technisches Messen

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We review recent advances in magnetic sensors for DC/AC current transducers, especially novel AMR sensors and integrated fluxgates, and we make critical comparison of their properties. Most contactless electric current transducers use magnetic cores to concentrate the flux generated by the measured current and to shield the sensor against external magnetic fields. In order to achieve this, the magnetic core should be massive. We present coreless current transducers which are lightweight, linear and free of hysteresis and remanence. We also show how to suppress their weak point: crosstalk from external currents and magnetic fields.

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“…The electrostatic detecting and exciting technique of the hemispherical resonator is achieved using an electrode to establish the electrostatic field. Electrostatic forces are produced by the piezoelectric effect that is applied in the field of current measurement and voltage control thanks to its high sensitivity [4,5]. When the resonator vibrates, the equivalent gap is changed so that the micro-current is detected and amplified to obtain the vibration signal of the resonator by the sensing circuit [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Uneven Electrostatic Forces on the Dynamic Characteristics of Capacitive Hemispherical Resonator Gyroscopes

et al. 2019

Sensors

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The hemispherical resonator gyroscope (HRG) is a typical capacitive Coriolis vibratory gyroscope whose performance is inevitably influenced by the uneven electrostatic forces caused by the uneven excitation capacitance gap between the resonator and outer base. First, the mechanism of uneven electrostatic forces due to the significantly uneven capacitance gap in that the non-uniformity of the electrostatic forces can cause irregular deformation of the resonator and further affect the performance and precision of the HRG, was analyzed. According to the analyzed influence mechanism, the dynamic output error model of the HRG was established. In this work, the effect of the first four harmonics of the uneven capacitance gap on the HRG was investigated. It turns out that the zero bias and output error, caused by the first harmonic that dominates mainly the amplitude of the uneven capacitance gap, increase approximately linearly with the increase of the amplitude, and periodically vary with the increase of the phase. The effect of the other three harmonics follows the same law, but their amplitudes are one order of magnitude smaller than that of the first one, thus their effects on the HRG can be neglected. The effect of uneven electrostatic forces caused by the first harmonic on the scale factor is that its nonlinearity increases approximately linearly with the increase of the harmonic amplitude, which was analyzed in depth. Considering comprehensively the zero bias, the modification rate of output error, and scale factor nonlinearity, the tolerance towards the uneven excitation capacitance gap was obtained.

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Piezoelectric ceramic sensor (PZT) applied to electric current measurements

Cited by 6 publications

References 13 publications

Recent Advances in Self-powered Sensors Based on Nanogenerators: From Material and Structural Design to Cutting-Edge Sensing Applications

Recent Advances in Self-powered Sensors Based on Nanogenerators: From Material and Structural Design to Cutting-Edge Sensing Applications

Contactless measurement of electric current using magnetic sensors

Effect of Uneven Electrostatic Forces on the Dynamic Characteristics of Capacitive Hemispherical Resonator Gyroscopes

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