Wireless piezoelectric acoustic-electric power feedthru

Bao, Xiaoqi; Doty, Benjamin J.; Sherrit, Stewart; Bădescu, Mircea; Bar‐Cohen, Yoseph; Aldrich, Jack; Chang, Zenghu

doi:10.1117/12.716429

Cited by 34 publications

(26 citation statements)

References 4 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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“…NASA developed two prototypes, successfully transferring 100W for 25 seconds, and 1kW for 5 seconds through titanium with a thickness of 3.4mm and 5mm respectively, achieving an efficiency of 84% and 88% [5,6]. The limited operation duration was due to heat buildup of the transducers as well as the medium.…”

Section: A State-of-the-art Aet Systemsmentioning

confidence: 99%

Wireless electric power transfer based on Acoustic Energy through conductive media

Leung

Willis

2014

2014 9th IEEE Conference on Industrial Electronics and Applications

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This paper presents the development of a new wireless electric power transfer technique named Acoustic Energy Transfer (AET). Sound waves are utilized to transfer energy through metal barriers without direct-wired connections. Factors influencing the performance of AET are investigated, and a prototype AET system is developed. The prototype demonstrated that 62W of power can be transferred across a 70mm thick aluminum block at an efficiency of 74% when the system operates at the resonant frequency of the transducer (28kHz). These experimental results are very promising for practical applications where power transfer is needed across metal barriers. Suggestions for further development on AET systems are also presented.

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Power transmission through a hollow cylinder by acoustic waves and piezoelectric transducers with radial polarization

Yang

Wang

et al. 2009

Journal of Sound and Vibration

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Wireless piezoelectric acoustic-electric power feedthru

Cited by 34 publications

References 4 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

Wireless electric power transfer based on Acoustic Energy through conductive media

Power transmission through a hollow cylinder by acoustic waves and piezoelectric transducers with radial polarization

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