A wireless self-powered urinary incontinence sensor system

Tanaka, Ami; Nakagawa, Yuki; Kitamura, Kazuma; Utsunomiya, Fumiyasu; Hama, N.; Douseki, Takakuni

doi:10.1109/icsens.2009.5398140

Cited by 14 publications

(8 citation statements)

References 2 publications

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“…Figure 36 shows an RFID fiber embedded into a disposable diaper. As the RFID fiber shown in Figure 5 is just as soft as conventional yarn, unlike conventional RFID tags, the fiber won't decrease the touch and feel of the diaper [22,23]. Figure 37 shows the mechanism to detect urination.…”

Section: Woven Electronic Textilesmentioning

confidence: 99%

Woven Electronic Textiles

2014

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Section: Woven Electronic Textilesmentioning

confidence: 99%

Woven Electronic Textiles

2014

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“…Two key requirements that make a biosensor easy to use are (a) a wireless capability, which enables a person to move about freely, and (b) self-powered operation, which eliminates the need for periodic battery replacement. We have already developed a wireless selfpowered urinary incontinence sensor [1] consisting of a urineactivated battery and a wireless transmitter. However, its thickness and rigidity make it unsuitable for embedding in a diaper.…”

Section: Introductionmentioning

confidence: 99%

Self-powered wireless urinary incontinence sensor for disposable diapers

Tanaka

Yamanaka

Yoshioka

et al. 2011

2011 IEEE SENSORS Proceedings

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A self-powered urinary incontinence sensor with a flexible wire-type urine-activated battery that is embedded in a diaper has been developed as an application for wireless biosensor networks. Since the battery is flexible, it conforms to the shape of the diaper when the diaper is worn. The stress produce by the curvature presses the electrodes firmly against the diaper material, providing greater contact with any urine present. Thus, due to the curvature, the battery generates more power than when it is flat, as in an unworn diaper. The battery also acts as a wide ground plane for the antenna of a wireless transmitter, providing a large radiated power. To verify the effectiveness of the battery, we fabricated a battery and a prototype sensor and embedded the battery in a diaper. When 80 cc of urine is poured onto the diaper, the battery outputs a voltage of 1 V, which allows the sensor to transmit an ID signal over a distance of 5 m.

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“…The sensor reduces the workload of the nurse and helps the patient maintain his dignity. We previously developed a wireless self-powered sensor with a urine-activated battery [2] [3]. However, the battery in that version had two disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Wearable self-powered diaper-shaped urinary-incontinence sensor suppressing response-time variation with 0.3-V start-up converter

Tanaka

Utsunomiya

Douseki

2014

IEEE SENSORS 2014 Proceedings

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A wearable, wireless self-powered urinaryincontinence sensor has been developed that consists of a diapershaped urine-activated battery, an intermittent-power-supply circuit with an ultralow-voltage start-up converter, and a wireless transmitter. The battery is embedded in a diaper and consists of absorbent material sandwiched between an aluminum electrode and a spongiform carbon electrode, which are safe to wear. The intermittent-power-supply circuit has a start-up converter that boosts the 0.5-V output of the battery to 2 V and drives a DC-DC converter. The two-stage boosting operation from 0.5 V suppresses the variation among batteries in the charging time of a storage capacitor, thereby reducing the variation among diapers in the response time of the sensor. A prototype urinary-incontinence sensor was fabricated to verify the concept. When 80 cc of urine are poured onto a diaper, the sensor transmits an ID signal over a distance of 5 m.

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A wireless self-powered urinary incontinence sensor system

Cited by 14 publications

References 2 publications

Woven Electronic Textiles

Woven Electronic Textiles

Self-powered wireless urinary incontinence sensor for disposable diapers

Wearable self-powered diaper-shaped urinary-incontinence sensor suppressing response-time variation with 0.3-V start-up converter

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