Summary
International Symposium on Antennas and Propagation
2012
Session Number:POS2
Session:
Number:POS2-52
The Characteristics of the RFID Antenna by Poses of Human Body for Urination Sensing
Hiromasa Nakajima, Masaharu Takahashi, Kazuyuki Saito, Koichi Ito,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
Radio frequency identification (RFID) system has been developed to use in various scenes, for instance, individual authentication, logistics, etc. An RFID system is consisted of RFID tag and Reader/Writer. The electromagnetic wave transmitted from the Reader/Writer antenna is received by RFID tag antenna and the integrated circuit (IC) chip of the tag can be excited. In addition, the information of the IC chip is return to Reader/Writer by the electromagnetic wave. In this system, the RFID tag antenna is very important because the size and the communication area of the RFID tag depend on the tag antenna. Recent year, this system has been expected to use in medical field because the heavy care burden of nursing staffs is a serious problem in many developed countries. One of hard work for health care personnel is changing diapers. It is hard for the health care personnel to know urination of his care-receivers without taking off the pant. Then this paper presents a sensing system for urination by RFID system. In our system, the urination is detected by whether the RFID tag embedded into a paper diaper can communicate with Reader/Writer or not. If the paper diaper is dry, the tag can communicate with Reader/Writer. In contrast, if it is wet, the tag cannot communicate with Reader/Writer because the urination prevents the electromagnetic wave. By use of this system, the health care personnel can know urination of his care-receivers without taking off the pant. Therefore it is possible to reduce his or her loading. In order to realize this system, the RFID tag antenna needs to be designed and analyzed. In addition, there are many poses when the care-receiver lies in bed. Therefore the characteristics of the antenna are evaluated by some human models of different poses.