Fabrics-based embroidered passive displacement sensors for on-body applications

Liu，Yulong; Wang，Miao; Xia，Bingyi; Ye，Terry Tao

2020

2562-2331

International Conference on Embedded Wireless Systems and Networks

230-235

Wearable electronic applications require flexible and aesthetic devices that can be naturally concealed with daily clothes. Embroidered sensors will be the perfect solution for these requirements because the devices can be seamlessly integrated with normal fabrics with soft and breathable structures. In this paper, we proposed a displacement sensor that can be directly embroidered with conductive yarns on fabrics using standard embroidery processes. The proposed sensor uses two mutually coupled embroidered coils (called coupling planar coils or CPC); displacement between the two coils will alter the mutual inductance. The sensor can be served as an NFC/RFID antenna to achieve battery-less sensing, i.e., connected with a passive transponder chip, the variation of inductance will modulate the amplitude and phase changes in coupled signals and can be further demodulated by the reading devices. Furthermore, this sensing mechanism is directional, restorable and can sense the directions in which the displacement occurs. Experiments demonstrate that this embroidered sensor exhibits a good, repeatable correlation between the displacement and its inductance. It can find its use in movement detection, medical monitoring, and many other wearable applications.

第一 ; 通讯

英语

2-s2.0-85120814544

Scopus

Southern University of Science and Technology,Shenzhen,China

Liu，Yulong,Wang，Miao,Xia，Bingyi,et al. Fabrics-based embroidered passive displacement sensors for on-body applications[C],2020:230-235.