Efficient Wireless Powering of Biomedical Sensor Systems for Multichannel Brain Implants

Stoecklin, Sebastian; Yousaf, Adnan; Volk, Tobias; Reindl, Leonhard M.

doi:10.1109/tim.2015.2482278

Cited by 60 publications

(27 citation statements)

References 22 publications

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“…Short-range wireless power transfer (WPT) by means of inductive coupling is a safe and established technique, extensively used to transfer power to implanted medical devices (IMDs). WPT avoids the use of transcutaneous wires in applications where implanted batteries do not represent a viable alternative, for example, in high-density visual and brain implants [ 1 , 2 , 3 , 4 ], neuromuscular interfaces [ 5 , 6 ], and implanted biosensors [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Frequency Splitting Analysis and Compensation Method for Inductive Wireless Powering of Implantable Biosensors

Schormans

Valente

Demosthenous

2016

Sensors

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Inductive powering for implanted medical devices, such as implantable biosensors, is a safe and effective technique that allows power to be delivered to implants wirelessly, avoiding the use of transcutaneous wires or implanted batteries. Wireless powering is very sensitive to a number of link parameters, including coil distance, alignment, shape, and load conditions. The optimum drive frequency of an inductive link varies depending on the coil spacing and load. This paper presents an optimum frequency tracking (OFT) method, in which an inductive power link is driven at a frequency that is maintained at an optimum value to ensure that the link is working at resonance, and the output voltage is maximised. The method is shown to provide significant improvements in maintained secondary voltage and system efficiency for a range of loads when the link is overcoupled. The OFT method does not require the use of variable capacitors or inductors. When tested at frequencies around a nominal frequency of 5 MHz, the OFT method provides up to a twofold efficiency improvement compared to a fixed frequency drive. The system can be readily interfaced with passive implants or implantable biosensors, and lends itself to interfacing with designs such as distributed implanted sensor networks, where each implant is operating at a different frequency.

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Section: Introductionmentioning

confidence: 99%

Frequency Splitting Analysis and Compensation Method for Inductive Wireless Powering of Implantable Biosensors

Schormans

Valente

Demosthenous

2016

Sensors

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“…Assuming the antenna's parasitic capacitance is C antenna and series resistance is R loss , Figure shows the reader's antenna and sensor coupling system's equivalent circuit model. Inductive link consisting of two coils mutually coupled by their near‐field technology is used by Stoecklin, Yousaf, Volk, and Reindl ().…”

Section: Circuit Modelmentioning

confidence: 99%

“…Subst rate t co t sub coupling system's equivalent circuit model. Inductive link consisting of two coils mutually coupled by their near-field technology is used by Stoecklin, Yousaf, Volk, and Reindl (2016).…”

Section: Reader's Antenna and Sensor Coupling Systemmentioning

confidence: 99%

Spiral planar coil design for the intracranial pressure sensor

et al. 2018

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Limited by the physiological constraints, implanted intracranial pressure (ICP) sensor's diameter is usually much shorter than measurement distance, which related to the poor coupling factor for the inductance coupling‐based passive sensor. As a result, the pattern of spiral planar coil on the sensor needs to be carefully designed; otherwise, the sensor could not be detected by the external reader. This paper begins with an improved lumped circuit model for the passive ICP sensor, in which the physical characteristics and corresponding approximated values of each component are discussed. Then, this study presents a formula to help researchers design the sensor's pattern such as dimensions, turns, spacing width and trace width, to make sensor easier to be detected. Some sensors were fabricated on PCB to verify the formula given. A set of the improved pattern parameters and fabrication progress are designed for the microelectromechanical systems sensor.

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“…There are two types of wireless charging, one is stationary WPT (SWPT) and another is In Motion WPT (IM-WPT) [3,4]. Wireless Power Transfer charges mobile robots and electric vehicles for its safety and convenience [5,6,7,8], medical aspects [9,10,11]. Such areas have received extensive attention.…”

Section: Introductionmentioning

confidence: 99%

Wireless power transmission for multi-degree-of-freedom motor applications based on magnetic field coupling

Gao

Zhang

2019

IEICE Electron. Express

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This paper proposes a wireless power transmission scheme for three-degree-of-freedom motors' applications in the field of bionics. In order to overcome the inconvenience of the rotating device with its charged wires, the wireless power transmission of the internal image visual acquisition device is realized. A three-coil receive structure suitable for motion device is designed. Using multi-physical simulation method, the parameters, magnetic flux and received power of single-coil receive structure and three-coil receive structure for wireless power transmission are calculated. The advantages of the three-coil receive structure are obtained. Finally, the accuracy and validity of the simulation are verified by experiments.

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Efficient Wireless Powering of Biomedical Sensor Systems for Multichannel Brain Implants

Cited by 60 publications

References 22 publications

Frequency Splitting Analysis and Compensation Method for Inductive Wireless Powering of Implantable Biosensors

Frequency Splitting Analysis and Compensation Method for Inductive Wireless Powering of Implantable Biosensors

Spiral planar coil design for the intracranial pressure sensor

Wireless power transmission for multi-degree-of-freedom motor applications based on magnetic field coupling

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