High-power piezoelectric acoustic-electric power feedthru for metal walls

Bao, Xiaoqi; Biederman, W.; Sherrit, Stewart; Bădescu, Mircea; Bar‐Cohen, Yoseph; Jones, Christopher M.; Aldrich, Jack; Chang, Zenghu

doi:10.1117/12.776473

Cited by 44 publications

(35 citation statements)

References 3 publications

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“…The function generator, oscilloscope and DC electronic load were all automatically controlled by a MATLAB (MathWorks Inc., Natick, MA) script on a personal computer (PC) to guarantee their synchronization. The fully automated measurements are faster, more objective and more precise than previous methods [15][16][17][18]. This is because the entire process does not require manual intervention and all measurement results are automatically read by the MATLAB script.…”

Section: Measurementsmentioning

confidence: 93%

“…From these values, it can be concluded that both the channel and the AC-DC converter were matched relatively well. As mentioned in Section 1, Bao et al, did not apply any AC-DC conversion circuit in their UTMWPT systems [15,16]. Systems presented by Leung et al could at best output only about 1.0 W of AC power [21].…”

Section: Measurementsmentioning

confidence: 99%

“…This is because the entire process does not require manual intervention and all measurement results are automatically read by the MATLAB script. Furthermore, the impedance mismatch caused by the error of the circuits, which was ignored in [15][16][17][18], was taken into account during the measurements. A photo of the measurement setup is presented in Figure 13.…”

Section: Measurementsmentioning

confidence: 99%

“…Bao et al, presented two UTMWPT systems successively, which could transmit electric powers up to 100 W and 1 kW, respectively, through several-millimetre-thick titanium plates and light incandescent bulbs [15,16]. The operating frequencies of these two UTMWPT systems are 747 kHz and 24.5 kHz, respectively.…”

Section: Introductionmentioning

confidence: 99%

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An Ultrasonic Through-Metal-Wall Power Transfer System with Regulated DC Output

Yang

2018

Applied Sciences

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Featured Application: Wirelessly powering sensors and circuits enclosed in hermetic metal containers.Abstract: This paper presents a novel and efficient system capable of transmitting medium-power electric energy through a solid metal wall and generating a regulated direct current (DC) output. The electric power is transmitted using radio frequency (RF) ultrasound without physical penetration. An RF alternating current to direct current converter with input impedance matching is used to convert the transmitted RF signal to a DC output, which is directly suitable as a power supply for electronic devices. The system is constructed from commercial off-the-shelf components, and a computer-controlled measurement method is designed to test the effectiveness of the full system. The measurement results show that the system is able to transfer power through a 40-mm-thick stainless steel plate and generate 5-V, 15.7-W regulated DC output power with an overall power transfer efficiency of 27.7%. In addition, the effectiveness of the system is successfully demonstrated by powering ARM ® evaluation boards with liquid-crystal display panels. A discussion of potential enhancements that could be made to improve the transfer capability and efficiency of the system is also presented. This system could be applied to improve safety and preserve structural integrity in many industrial and military applications, such as submarines, space crafts, planes, nuclear storage facilities, etc.

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Section: Measurementsmentioning

confidence: 93%

Section: Measurementsmentioning

confidence: 99%

Section: Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Ultrasonic Through-Metal-Wall Power Transfer System with Regulated DC Output

Yang

2018

Applied Sciences

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“…Among these applications, power transformers always exploit piezoelectric transducers to generate acoustic waves propagating through a sealed metal wall for transmitting a small amount of power to the electronic devices on the other side of the metal wall, such as nuclear waste containers, gas cylinders, vacuum chambers, and pipelines [7][8][9][10], etc. However, operation of the transformer also produces acoustic noise, which could pose noise pollution to human beings.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Radiation of a Cylindrical Piezoelectric Power Transformer

Zhang

Gui-ru²,

Zhang

2013

Journal of Applied Mechanics

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Theoretical analysis is performed for the sound radiation of a cylindrical power transformer composed of piezoelectric transducers with radial polarization. The transformer is driven in thickness-stretch mode, and an exact solution is obtained for the sound pressure and sound power level in the surrounding fluid. Representative examples are used to illustrate the sound field induced by the operation of the transformer. Numerical results indicate that the electrical impedance and the thickness ratio of actuatorlsensor to metal core have considerable effects on sound radiation of the cylindrical power transformer.

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Wireless Power Transmission Technology

Chen

Hong²

2023

Encyclopedia of Smart Agriculture Technologies

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High-power piezoelectric acoustic-electric power feedthru for metal walls

Cited by 44 publications

References 3 publications

An Ultrasonic Through-Metal-Wall Power Transfer System with Regulated DC Output

An Ultrasonic Through-Metal-Wall Power Transfer System with Regulated DC Output

Acoustic Radiation of a Cylindrical Piezoelectric Power Transformer

Wireless Power Transmission Technology

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