Radio frequency identification tag and diaper, absorber and sensing system using the same

Abstract

A radio frequency (RF) identification tag including a substrate, a planar antenna, an RF chip, a plurality of signal conductors and a plurality of ground conductors is provided. The RF chip receives an RF signal from the planar antenna to generate an identification code. The signal conductors are coupled to the planar antenna. The ground conductors, interlaced on two opposite sides of the signal conductors, and the signal conductors are adjacent to each other and disposed on the substrate to form a coplanar waveguide structure which includes an impedance match portion and a transmission portion. The impedance match portion has an input end coupled to the signal conductors and a ground plane coupled to the ground conductors. The RF chip is disposed between the input end and the ground plane. The transmission portion is connected between the impedance match portion and the planar antenna.

Description

technical field [0001] The present invention relates to a diaper, an absorbent pad and a urine wetness sensing system, and in particular to a radio frequency identification tag with a coplanar waveguide transmission line structure and a diaper, an absorbent pad and a sensing system using the same system. Background technique [0002] Generally speaking, the paper diapers used by babies, or the paper diapers and paper changing pads used by the elderly who are bedridden, have limited mobility, or people in a vegetable state must be changed frequently, otherwise, if the urine is wet for a long time, it will be easy to change. Cause diaper rash or skin disease, more likely to cause risks such as urinary tract infection. In particular, at present, long-term care centers have a large number of caregivers and relatively insufficient caregivers, so it is difficult to immediately and accurately know which caregivers need to change their diapers, resulting in an increased risk of uri...

AI Technical Summary

Problems solved by technology

However, looking at the existing paper diapers, even those with wetness display structures still need to actively observe whether the paper diapers have a wetness display at any time. For parents or caregivers, the psychological pressure and burden will be virtually increased.

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