Abstract
This paper proposes a visual management scheme of medical things with a color-change radio frequency identification (RFID) tag. The color-change RFID tag employs a specific RFID tag integrated circuit (IC) and a laminated pH-indicating paper. The IC has energy harvesting and switched ground functions, which enable it to generate electricity to the laminated pH-indicating paper. This phenomenon causes electrolysis of NaCl solution absorbed in the laminated pH-indicating paper. Electrolysis generates alkaline matter to change the color of the pH-indicating paper. This paper gives a new and sensitive structure of the laminated pH-indicating paper. The proposed advanced color-change RFID tag with new laminated pH-indicating paper succeeds in changing its color noticeably at a 1 m distance using an RFID reader radiating 1 W radio waves. The color change was observed 3–5 s after starting radio wave irradiation. The results of this experiment also confirm that the changed color can be held for over 24 h. Furthermore, two demonstrations of the visual management system of medical things (patient clothes and sanitizers) are presented.
Highlights
This paper proposes a visual management scheme of medical things with a color-change radio frequency identification (RFID) tag
We demonstrate two Internet of Medical Things (IoMT) applications: one is for managing patient clothes, and the other is for managing sanitizers
The switch ground is a built-in function of the RFID integrated circuit (IC) we employed, which is explained in the later part
Summary
This paper proposes a visual management scheme of medical things with a color-change radio frequency identification (RFID) tag. The proposed advanced colorchange RFID tag with new laminated pH-indicating paper succeeds in changing its color noticeably at a 1 m distance using an RFID reader radiating 1 W radio waves. RFID systems are divided into chip and chipless RFID systems Both systems enable low-cost, wireless and passive unique identifications for medical things. In our proposed system, an RFID reader sends commands to enable visual management for all the tag populations at once With this visualization, the colors of the specific RFID tags can be changed, and a staff member can identify the specific things
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