Power management architecture for smart hip prostheses comprising multiple energy harvesting systems
2013; Elsevier BV; Volume: 202; Linguagem: Inglês
10.1016/j.sna.2013.01.049
ISSN1873-3069
AutoresNuno Silva, P. Marques Dos Santos, Jorge Ferreira, Marco P. Soares dos Santos, António Ramos, J.A. Simões, Manuel J. C. S. Reis, Raul Morais,
Tópico(s)Wireless Power Transfer Systems
ResumoAbstract Energy harvesting solutions such as instrumented orthopaedic implants are under development to power a wide variety of electronic systems including biomedical implants. Three micro-power generators have already been developed as part of a smart hip prosthesis structure. This paper outlines a power management architecture for efficient harvesting of energy to supply power to modules other than those powered by current instrumented implants. Considering that it is impossible to predict the amount of energy harvested by each particular person, the proposed system also comprises an activation circuit and its ultracapacitor energy reservoir as a fourth type of energy to be used when a continuous energy source is needed. The hip prosthesis prototype has now the capability to energize more power demanding loads, intermittently or continuously, such as radio-frequency modules. The proposed architecture enables operation of a Bluetooth low energy (V4.0) embedded device (BLE112 from Bluegiga), part of a wireless body sensor network, up to 50 s, and a MSP430/eZ430-RF2500 (Texas Instruments), which uses the SimpliciTI communication protocol, up to 110 s, solely using the energy produced by one of the generators.
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