Smart radio-frequency identification tag for diaper moisture detection

[摘要] A passive smart tag is described that responds to dampness in diapers once a pre-defined threshold value is reached. A high-frequency (HF) system at 13.56 MHz is used as this allows operation through water or human tissues with less absorption that would occur for an ultra-HF signal. A circular spiral coil and swelling substrate facilitate a reaction to dampness that can be detected without contact to the diaper wearer. A prototype design is simulated and measured results are provided together with a demonstration of a tag integrated into a worn diaper.

[学科分类] 肠胃与肝脏病学

[关键词] radiofrequency identification;intelligent sensors;body sensor networks;moisture measurement;skin;coils;biomedical equipment;smart radiofrequency identification tag;diaper moisture detection;passive smart tag;diaper dampness;predefined threshold value;high-frequency system;human tissues;water;ultraHF signal;circular spiral coil;swelling substrate;prototype design;frequency 13.56 MHz