TY - JOUR
T1 - Piezoelectric Wireless Power Transfer Using a Halbach Array for the Internet of Implanted Things
AU - Fu, Hailing
AU - Gibson, George
AU - Liu, Zhuowen
AU - Chen, Boli
AU - Lu, Maobin
AU - Chen, Chen
AU - Jiang, Dong
AU - Chrysochoidis, Nikolaos A.
AU - Deng, Fang
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2024
Y1 - 2024
N2 - Implanted devices are increasingly used in chronic disease monitoring, but face challenges in energy autonomy. This article presents a novel wireless power transfer (WPT) method for self-sustained medical implants using Halbach array-based magnetic plucking and piezoelectric transduction. The wearable-implantable coupled system consists of a piezoelectric receiver within the implant to receive power and a near-field magnetic power transmitter as a wearable device. To deliver power over greater distances through the human body, the transmitter features a rotating magnetic Halbach array powered by a miniature motor, or by human motion, to generate an alternating magnetic field. The use of low-frequency rotating magnetic fields periodically excites a cantilevered piezoelectric beam with a tip magnet to realize WPT. A theoretical model that includes magnetic coupling, piezoelectric transduction and receiver beam dynamics has been established to study the electro-magneto-mechanical dynamics of this WPT system. The effectiveness of the Halbach array for extended power transfer is examined through theoretical modeling and numerical simulation, showing a 37.2% enhancement of the magnetic forces. A prototype was also fabricated and tested to examine the WPT performance. The established wireless power link can provide sufficient power (∼ 32 μ W) over a large transmission distance (22 mm), providing a potential battery-free solution for the self-sustained Internet of Implanted Things (IoIT) for personalized healthcare.
AB - Implanted devices are increasingly used in chronic disease monitoring, but face challenges in energy autonomy. This article presents a novel wireless power transfer (WPT) method for self-sustained medical implants using Halbach array-based magnetic plucking and piezoelectric transduction. The wearable-implantable coupled system consists of a piezoelectric receiver within the implant to receive power and a near-field magnetic power transmitter as a wearable device. To deliver power over greater distances through the human body, the transmitter features a rotating magnetic Halbach array powered by a miniature motor, or by human motion, to generate an alternating magnetic field. The use of low-frequency rotating magnetic fields periodically excites a cantilevered piezoelectric beam with a tip magnet to realize WPT. A theoretical model that includes magnetic coupling, piezoelectric transduction and receiver beam dynamics has been established to study the electro-magneto-mechanical dynamics of this WPT system. The effectiveness of the Halbach array for extended power transfer is examined through theoretical modeling and numerical simulation, showing a 37.2% enhancement of the magnetic forces. A prototype was also fabricated and tested to examine the WPT performance. The established wireless power link can provide sufficient power (∼ 32 μ W) over a large transmission distance (22 mm), providing a potential battery-free solution for the self-sustained Internet of Implanted Things (IoIT) for personalized healthcare.
KW - Halbach array
KW - implantable medical devices
KW - Internet of Implanted Things (IoIT)
KW - magnetic plucking
KW - piezoelectric transducers
KW - self-sustained sensing
KW - wireless power transfer (WPT)
UR - http://www.scopus.com/inward/record.url?scp=85204116690&partnerID=8YFLogxK
U2 - 10.1109/JIOT.2024.3457810
DO - 10.1109/JIOT.2024.3457810
M3 - Article
AN - SCOPUS:85204116690
SN - 2327-4662
VL - 11
SP - 41049
EP - 41060
JO - IEEE Internet of Things Journal
JF - IEEE Internet of Things Journal
IS - 24
ER -