12 papers
Machine-knittable, Magnetically-Plug-n-Play E-Textile Prototyping
Yifan Li, Ryo Takahashi, Wakako Yukita +7
Electronic textiles (e-textiles) integrated with wearable sensors are essential for daily motion monitoring and long-term physiological sensing. For example, capturing optimal kine…
3D-Printing Water-Soluble Channels Filled with Liquid Metal for Recyclable and Cuttable Wireless Power Sheet
Takashi Sato, Ryo Takahashi, Kento Yamagishi +6
A recyclable and cuttable wireless power transfer (WPT) sheet is proposed, enabled by H-tree wiring and water-soluble channels filled with liquid metal (LM). Conventional 2D WPT sy…
Body-scale NFC for wearables: human-centric body-scale NFC networking for ultra-low-power wearable devices (Demo of UTokyo Kawahara Lab 2025)
Hideaki Yamamoto, Yifan Li, Wakako Yukita +4
Near Field Communication (NFC) is a promising technology for ultra-low-power wearables, yet its short communication range limits its use to narrow-area, point-to-point interactions…
Ultra-low-power ring-based wireless tinymouse
Yifan Li, Masaaki Fukumoto, Mohamed Kari +6
Wireless mouse rings offer subtle, reliable pointing interactions for wearable computing platforms. However, the small battery below 27 mAh in the miniature rings restricts the rin…
Full-body WPT: wireless powering with meandered e-textiles
Ryo Takahashi, Takashi Sato, Wakako Yukita +3
We present Full-body WPT, wireless power networking around the human body using a meandered textile coil. Unlike traditional inductive systems that emit strong fields into the deep…
Full-body NFC: body-scale near-field sensor networks with machine-knittable meandered e-textiles
Ryo Takahashi, Changyo Han, Wakako Yukita +6
Wireless body networks comprising battery-free on-body sensors and textile-based wireless readers can enable daily health monitoring and activity tracking by continuously monitorin…