Journal
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
Volume 25, Issue 3, Pages 772-777Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TDEI.2017.006991
Keywords
piezoelectricity; polymer; poly-l-lactic acid; fiber; Kumihimo; braided cord; choker; necklace; heart beat
Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan [24655108, 15K13714]
- Grants-in-Aid for Scientific Research [15K13714, 24655108] Funding Source: KAKEN
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A new piezoelectric sensor was developed in the shape of a traditional Japanese braided cord known as a Kumihimo by weaving piezoelectric poly-l-lactic acid (PLLA) fibers (piezoelectric PLLA braided cord). We found that the piezoelectric PLLA braided cord tied in various decorative knots, and worn as an accessory such as a choker or necklace, can detect pulse waves, swallowing, and coughing in a systematic way in one's daily life. To demonstrate this, we developed a system for measuring pulse waves with a Wi-Fi communication system using a piezoelectric PLLA braided cord with decorative knots.
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