Smart Diaper Generates Power From Urine
Smart Diaper Generates Power From Urine as Ritsumeikan University japan , prototyped a wireless involuntary urination sensor system . It notifies the user of the timing of replacing a paper diaper via wireless communication without using a battery.
The university expects that it will be used at nursing facilities that care patients of urinary incontinence. The system carries out wireless communication by using electricity generated by using urine.
The amount of urine stored in the diaper is estimated from the interval of signal reception, and the user is notified of the optimal timing of replacing a diaper.
The system does not require a battery for wireless communication, and the paper diaper incorporating electrodes is disposable. The system was developed by Takakuni Douseki, who was looking for micro energy harvesting, as a professor at the Department of Electronic and Computer Engineering .
For the demonstration, a commercially-available paper diaper for infants was modified. It contains one activated carbon that is 320mm in length and 5mm in width and two an aluminum electrode whose width is 1.8mm between absorbent and a waterproof sheet.
The current of electricity generated by the system increases as the amount of input urine increases. Also, at the time of pouring in urine, the current rapidly increases.
Electricity generated from urine is stored in a capacitor in the sensor. When the amount of urine reaches a certain level, the system transmits wireless signals. Notify the user to change the diaper when the level of urine increases as can be improved in future .
He stated that the difference in current is caused by urine soaking into pores and activating the carbon to high sensitivity as Douseki said to the press .