DocumentCode :
113619
Title :
Controllable wireless power delivery for biomedical implants
Author :
Venkateswaran, Madhav ; Lee, Fred T. ; van der Weide, Daniel
Author_Institution :
Dept. of Electr. & Comput. Eng. Dept., Univ. of Wisconsin-Madison, Madison, WI, USA
fYear :
2014
fDate :
8-10 Oct. 2014
Firstpage :
125
Lastpage :
128
Abstract :
We demonstrate a method, independent of coil geometry, orientation and separation, to measure inductive wireless power transfer to an implanted coil, without a bidirectional communication link. Load switching on the implantable coil at 1 kHz modulates the 13.56 MHz carrier signal. A lock-in amplifier detects current perturbation in the excitation coil at the switching frequency producing an output proportional to the induced current in the implantable coil. Measurements show good agreement with analytical values at different locations in a 5mm × 5mm grid for parallel and orthogonal coil orientations. Observed standard deviations are within 10% and 15% for parallel and orthogonal orientations.
Keywords :
prosthetic power supplies; biomedical implants; carrier signal; coil geometry; controllable wireless power delivery; current perturbation; excitation coil; frequency 1 kHz; implanted coil; inductive wireless power transfer measurement; load switching; lock-in amplifier; orthogonal coil orientation; parallel coil orientation; switching frequency; Amplifiers; Coils; Current measurement; Monitoring; Radio frequency; Wireless communication; Wireless sensor networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Healthcare Innovation Conference (HIC), 2014 IEEE
Conference_Location :
Seattle, WA
Type :
conf
DOI :
10.1109/HIC.2014.7038890
Filename :
7038890
Link To Document :
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