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Design and development of a card‐sized virtual keyboard using permanent magnets and hall sensors
Author(s) -
Demachi Kazuyuki,
Ohyama Makoto,
Kanemoto Yoshiki,
Masaie Issei
Publication year - 2009
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.10043
Subject(s) - magnet , key (lock) , computer science , hall effect sensor , computer hardware , electrical engineering , engineering , operating system
This paper proposes a method to distinguish the key‐type of human fingers attached to small permanent magnets. The Hall sensors arrayed in the credit card‐size area feel the distribution of the magnetic field due to the key‐typing movement of the human fingers as if a keyboard exists, and the signal is analyzed using the genetic algorithm or the neural network algorithm to distinguish the typed keys. By this method, the keyboard can be miniaturized to credit card size (54 mm × 85 mm). We called this system “the virtual keyboard system.” © 2009 Wiley Periodicals, Inc. Electron Comm Jpn, 92(3): 32–37, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecj.10043