Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances
Wireless Power Transfer (WPT) with simultaneous data transmission through coupled magnetic resonators is investigated in this paper. The development of this system is dedicated to serve as a basis for applications in the field of Ambient Assisted Living (AAL), for example tracking vital parameters r...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | deu |
| Published: |
Copernicus Publications
2015-11-01
|
| Series: | Advances in Radio Science |
| Online Access: | http://www.adv-radio-sci.net/13/217/2015/ars-13-217-2015.pdf |
| _version_ | 1811262610876661760 |
|---|---|
| author | C. Schmidt E. Lloret Fuentes M. Buchholz |
| author_facet | C. Schmidt E. Lloret Fuentes M. Buchholz |
| author_sort | C. Schmidt |
| collection | DOAJ |
| description | Wireless Power Transfer (WPT) with simultaneous data transmission through coupled magnetic resonators is investigated in this
paper. The development of this system is dedicated to serve as a basis for applications in the field of Ambient Assisted Living
(AAL), for example tracking vital parameters remotely, charge and control sensors and so on. Due to these different scenarios we
consider, it is important to have a system which is reliable under the circumstance of changing positioning of the receiving
device. State of the art radio systems would be able to handle this. Nevertheless, energy harvesting from far field sources is not
sufficient to power the devices additionally on mid-range distances. For this reason, coupled magnetic resonant circuits are
proposed as a promising alternative, although suffering from more complex positioning dependency.
<br><br>
Based on measurements on a simple prototype system, an equivalent circuit description is used to model the transmission system
dependent on different transmission distances and impedance matching conditions. Additionally, the simulation model is used to
extract system parameters such as coupling coefficients, coil resistance and self-capacitance, which cannot be calculated in a
simple and reliable way.
<br><br>
Furthermore, a mathematical channel model based on the schematic model has
been built in MATLAB<sup>©</sup>. It is used to point out the problems
occurring in a transmission system with variable transmission distance,
especially the change of the passband's centre frequency and its bandwidth.
Existing solutions dealing with this distance dependent behaviour, namely the
change of the transmission frequency dependent on distance and the addition
of losses to the resonators to increase the bandwidth, are considered as not
inventive. First, changing the transmission frequency increases the
complexity in the data transmission system and would use a disproportional
total bandwidth compared to the actually available bandwidth. Additionally,
adding losses causes a decrease in the energy transmission efficiency.
<br><br>
Based on these facts, we consider a system that changes the channel itself
by tuning the resonant coils in a way that the passband
is always at a fixed frequency. This would overcome the previously described
issues, and additionally could allow for the
possibility to run several independent transmission systems in parallel without disturbing each other. |
| first_indexed | 2024-04-12T19:29:51Z |
| format | Article |
| id | doaj.art-8a99ba9ec21248f788ddf07d595d2ac9 |
| institution | Directory Open Access Journal |
| issn | 1684-9965 1684-9973 |
| language | deu |
| last_indexed | 2024-04-12T19:29:51Z |
| publishDate | 2015-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Advances in Radio Science |
| spelling | doaj.art-8a99ba9ec21248f788ddf07d595d2ac92022-12-22T03:19:23ZdeuCopernicus PublicationsAdvances in Radio Science1684-99651684-99732015-11-011321722610.5194/ars-13-217-2015Investigations and system design for simultaneous energy and data transmission through inductively coupled resonancesC. Schmidt0E. Lloret Fuentes1M. Buchholz2Research Group RI-ComET at the University of Applied Sciences Saarbrücken, Hochschul-Technologie-Zentrum, Altenkesselerstr. 17/D2, 66115 Saarbrücken, GermanyResearch Group RI-ComET at the University of Applied Sciences Saarbrücken, Hochschul-Technologie-Zentrum, Altenkesselerstr. 17/D2, 66115 Saarbrücken, GermanyResearch Group RI-ComET at the University of Applied Sciences Saarbrücken, Hochschul-Technologie-Zentrum, Altenkesselerstr. 17/D2, 66115 Saarbrücken, GermanyWireless Power Transfer (WPT) with simultaneous data transmission through coupled magnetic resonators is investigated in this paper. The development of this system is dedicated to serve as a basis for applications in the field of Ambient Assisted Living (AAL), for example tracking vital parameters remotely, charge and control sensors and so on. Due to these different scenarios we consider, it is important to have a system which is reliable under the circumstance of changing positioning of the receiving device. State of the art radio systems would be able to handle this. Nevertheless, energy harvesting from far field sources is not sufficient to power the devices additionally on mid-range distances. For this reason, coupled magnetic resonant circuits are proposed as a promising alternative, although suffering from more complex positioning dependency. <br><br> Based on measurements on a simple prototype system, an equivalent circuit description is used to model the transmission system dependent on different transmission distances and impedance matching conditions. Additionally, the simulation model is used to extract system parameters such as coupling coefficients, coil resistance and self-capacitance, which cannot be calculated in a simple and reliable way. <br><br> Furthermore, a mathematical channel model based on the schematic model has been built in MATLAB<sup>©</sup>. It is used to point out the problems occurring in a transmission system with variable transmission distance, especially the change of the passband's centre frequency and its bandwidth. Existing solutions dealing with this distance dependent behaviour, namely the change of the transmission frequency dependent on distance and the addition of losses to the resonators to increase the bandwidth, are considered as not inventive. First, changing the transmission frequency increases the complexity in the data transmission system and would use a disproportional total bandwidth compared to the actually available bandwidth. Additionally, adding losses causes a decrease in the energy transmission efficiency. <br><br> Based on these facts, we consider a system that changes the channel itself by tuning the resonant coils in a way that the passband is always at a fixed frequency. This would overcome the previously described issues, and additionally could allow for the possibility to run several independent transmission systems in parallel without disturbing each other.http://www.adv-radio-sci.net/13/217/2015/ars-13-217-2015.pdf |
| spellingShingle | C. Schmidt E. Lloret Fuentes M. Buchholz Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances Advances in Radio Science |
| title | Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances |
| title_full | Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances |
| title_fullStr | Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances |
| title_full_unstemmed | Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances |
| title_short | Investigations and system design for simultaneous energy and data transmission through inductively coupled resonances |
| title_sort | investigations and system design for simultaneous energy and data transmission through inductively coupled resonances |
| url | http://www.adv-radio-sci.net/13/217/2015/ars-13-217-2015.pdf |
| work_keys_str_mv | AT cschmidt investigationsandsystemdesignforsimultaneousenergyanddatatransmissionthroughinductivelycoupledresonances AT elloretfuentes investigationsandsystemdesignforsimultaneousenergyanddatatransmissionthroughinductivelycoupledresonances AT mbuchholz investigationsandsystemdesignforsimultaneousenergyanddatatransmissionthroughinductivelycoupledresonances |