TY - GEN
T1 - Non-contact hand interaction with smart phones using the wireless power transfer features
AU - Liu, Chenhui
AU - Gu, Changzhan
AU - Li, Changzhi
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/6/19
Y1 - 2015/6/19
N2 - The interaction between human and smart phones is mainly based on press buttons and touch screens. As wireless charging based on wireless power transfer (WPT) coils is standardized and becoming a competitive feature for smart phones in recent years, it is also possible to control smart phones without contact by interacting with their wireless charging coils. In this paper, a non-contact method to interact with smart phones based on their wireless charging coils is proposed and investigated. A Colpitts oscillator is built and tested using a standard WPT coil as part of the resonant tank elements. Experiment results show that the resonant frequency of the coil is heavily influenced by hand movement, which could be further interpreted as the interaction between human and smart phones. By analyzing the resonant frequency changes of multiple coils embedded into a phone, it is possible to determine which hand movement is performed by a user.
AB - The interaction between human and smart phones is mainly based on press buttons and touch screens. As wireless charging based on wireless power transfer (WPT) coils is standardized and becoming a competitive feature for smart phones in recent years, it is also possible to control smart phones without contact by interacting with their wireless charging coils. In this paper, a non-contact method to interact with smart phones based on their wireless charging coils is proposed and investigated. A Colpitts oscillator is built and tested using a standard WPT coil as part of the resonant tank elements. Experiment results show that the resonant frequency of the coil is heavily influenced by hand movement, which could be further interpreted as the interaction between human and smart phones. By analyzing the resonant frequency changes of multiple coils embedded into a phone, it is possible to determine which hand movement is performed by a user.
KW - Colpitts oscillator
KW - non-contact smart phone interaction
KW - spectrogram
KW - wireless charging
UR - http://www.scopus.com/inward/record.url?scp=84937881102&partnerID=8YFLogxK
U2 - 10.1109/RWS.2015.7129750
DO - 10.1109/RWS.2015.7129750
M3 - Conference contribution
AN - SCOPUS:84937881102
T3 - IEEE Radio and Wireless Symposium, RWS
SP - 20
EP - 22
BT - RWS 2015 - Proceedings
PB - IEEE Computer Society
T2 - 2015 IEEE Radio and Wireless Symposium, RWS 2015 - RWW 2015
Y2 - 25 January 2015 through 28 January 2015
ER -