期刊
IEEE SENSORS JOURNAL
卷 14, 期 2, 页码 522-531出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2013.2284815
关键词
Remote powering; wireless power transfer; implantable electronics; multi-sensor system; monitoring system; implantable micro-system; servo-controlled power transfer; x-y rails; biomedical implant; system for freely moving animal; remotely powered sensor systems; in-vivo implantable system
资金
- Swiss National Funding through Sinergia Initiative
A system for wireless power transfer of micro-systems in-vivo implantable in small animals is presented. The described solution uses a servo-controlled transmitter moved under the animal moving space. The solution minimizes the power irradiation while enabling animal speeds up to 30 cm/s. An x-y movable magnetic coil transmits the required power with a level able to keep constant the received energy. A permanent magnet on board of the implantable micro-system and an array of magnetic sensors form a coil tracking system capable of an alignment accuracy as good as 1 cm. The power is transferred over the optimized remote powering link at 13.56 MHz. The received ac signal is converted to dc voltage with a passive full-wave integrated rectifier and the voltage regulator supplies 1.8 V for the implantable sensor system. Experimental measurement on a complete prototype verifies the system performance.
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