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Patents

Method for Indicating and Alarming About Wet Level of Diaper:

U.S. Patent No. 10,492,959

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By: Karen McIntyre

Editor, Nonwovens Industry

Jun Yi, Dongguan, China; Zhihua He, Dongguan, China; Fangyi Cai, Dongguan, China; Minghui Du, Dongguan, China; Weimin Chen, Dongguan, China; Zhantu Zheng, Dongguan, China; and Jianchao Xu, Dongguan, China.
Assigned to Dongguan Southstar Electronics Limited, Dongguan, Guangdong, China.

Filed: 5/7/17
Issued: 12/3/19

A method for indicating and alarming about wet level of a diaper, comprising the following steps: using a humidity sensor to perform relative humidity detection on the diaper; wherein the diaper’s wet level is shown as 0% rh when detected relative humidity is below 50% rh˜60% rh, and the diaper’s wet level is shown as 100% rh when detected relative humidity is 85% rh˜95% rh or more; wherein functional conversion is performed to convert the relative humidity ranging between 60% rh and 85% rh˜95% rh proportionally into the diaper’s wet level between 0% rh and 100% rh; converting the detected relative humidity into the diaper’s wet level when a first urination is detected and displaying the level through a mobile end, and using the mobile end to alarm a user about diaper change when the diaper’s wet level reaches or exceeds a threshold set by the user for trigger an alarm about diaper change; wherein detection of the first urination comprises the following steps: (1) determining that Condition 1 is satisfied when a relative humidity collected by the humidity sensor lastly is greater than relative humidity of previous N times and is 1% rh˜3% rh greater than a minimum among the relative humidity of the previous N times; (2) determining that Condition 2 is satisfied and the first urination has happened when relative humidity detected in continuous M times satisfies Condition 1, and the relative humidity detected in the Mth time is 3% rh˜6% rh greater than a minimum among the relative humidity of the previous N+M times; and (3) starting to detect a second urination when variation of the relative humidity becomes steady.

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