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[Keyword] infrared beam(1hit)

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  • Wireless Tag System Using an Infrared Beam and an Electromagnetic Wave for Outdoor Facilities

    Yasuhiro NAGAI  Naobumi SUZUKI  Yoshimitsu OHTANI  Yutaka ICHINOSE  Hiroyuki SUDA  

     
    LETTER-Radio Communication

      Vol:
    E80-B No:3
      Page(s):
    494-498

    A wireless tag system has been designed and developed for maintaining and managing outdoor communication facilities. This system employs an infrared (IR) beam and an electromagnetic wave with a radio frequency (RF), and is constructed using IR-RF tags, an IR commander, and an RF receiver. The IR command radiation with strong directivity enables a maintenance operator to recognize a target facility, and the RF response without directivity enables a management system to obtain data from within a large circular area. Solar and secondary batteries are also adopted as the power module in the tag to allow easy maintenance at long intervals. IR signal communication is possible up to a distance of 9 m, and RF signal communication is possible within a circle with a radius of 9 m.