~/talk

TelemetRing: A Batteryless and Wireless Ring-shaped Keyboard using Passive Inductive Telemetry

on YouTube 13m
Talkat UIST 2020 · 2020-10-20..10-23· [embedded-and-hardware, iot]

speakers

name:Ryo Takahashi
links:none on file
name:Masaaki Fukumoto
links:none on file
name:Changyo Han
links:none on file
name:Takuya Sasatani
links:none on file
name:Yoshiaki Narusue
links:none on file
name:Yoshihiro Kawahara
links:none on file

resources

video:https://youtu.be/8xgMMyThk2M
slides:none on file

summary

A batteryless and wireless ring-shaped keyboard is built: five ring sensor coils (each a 6 g, 3.5 cm3 coil with a piezo and varactor) and a wristband readout coil operating around 13.56 MHz, decoded by a USRP measuring phase spectra. Passive inductive telemetry uses distributed reactance compensation and a balanced bridge to boost sensitivity so tiny shock-induced varactor changes (~1 pF) are detected. The system implements a 5-bit chord keyboard, achieves 89.7% typing detection ratio in prototypes, and runs chord decoding on a PC.

AI-written summary · about

chapters (7)

  1. 0:00Introduction
  2. 1:15Limitations of existing keyboards
  3. 3:16Why passive inductive telemetry
  4. 6:11How TelemetRing works
  5. 9:54Balanced bridge circuit details
  6. 11:00Prototype and typing recognition
  7. 12:12Summary and future work

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