A Novel Low Cost Wireless Incontinence Sensor System (Screen-Printed Flexible Sensor System) for Wireless Urine Detection in Incontinence Materials

Ngo, Ha-Duong; Hoang, Thanh H.; Baeuscher, Manuel; Wang, Bei; Mackowiak, Piotr; Grabbert, Nils; Weiland, Thomas; Ehrmann, O.; Lang, Klaus‐Dieter; Schuster, Martin; Grudno, Jens

doi:10.3390/proceedings2130716

Cited by 10 publications

(12 citation statements)

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“…The performance of the equivalent PPC-and IDC-based sensors as a diaper urine sensor was exhaustively measured and qualified in this work. Moreover, time response data of the sensor, missing from other similar papers [1][2][3], revealed a pattern of a rapid decline in frequency followed by a recovery region. Verifying the potential of the proposed sensor in other moisture-sensing applications remains as future work.…”

Section: Discussionmentioning

confidence: 79%

“…The current work and other recent moisture sensors are compared in Table 4. The current work and that of [3] have significant advantages over those of [1,2], because the former are a passive type. Because active circuitry is needed in [1,2], they can be significantly more expensive than low-cost passive sensors.…”

Section: Resultsmentioning

confidence: 96%

“…The current work and that of [3] have significant advantages over those of [1,2], because the former are a passive type. Because active circuitry is needed in [1,2], they can be significantly more expensive than low-cost passive sensors. The sensor in [3] is similar to the demonstrated sensor because they both rely on the change in the resonant frequency of the LC tanks.…”

Section: Resultsmentioning

confidence: 96%

“…Moisture and water content sensing is a prerequisite for various industrial applications, such as urine sensors in the medical industry [1][2][3], sensing moisture content in concrete in the construction industry [4], and sensing soil moisture content in the agricultural industry [5]. The precise sensing of moisture content offers significant control over manufacturing processes, product yield, and quality assurance.…”

Section: Introductionmentioning

confidence: 99%

“…The sensor tags operational at an ultra-high frequency (UHF) of 8.2 MHz electronic article surveillance (EAS) [18] frequency band were designed and fabricated based on IDC and PPC. The sensors were designed to have a small area of less than 70 × 70 mm 2 , high maximized quality factor Q, and large frequency change when exposed to moisture. Experimental results reveal significant enhancement in the performance of the sensor based on IDC compared to that based on PPC 5% increase in the maximum detection distance and 10% increase in sensitivity based on frequency offset.…”

Section: Introductionmentioning

confidence: 99%

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Interdigital Capacitor-Based Passive LC Resonant Sensor for Improved Moisture Sensing

Dimitrov

Song

Chang

et al. 2020

Sensors

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Herein, a passive low-profile moisture sensor design based on radio frequency identification (RFID) technology is proposed. The sensor consists of an LC resonant loop, and the sensing mechanism is based on the fringing electric field generated by the capacitor in the circuit. A standard planar inductor and a two-layer interdigital capacitor (IDC) with a significantly higher fringing capacitance compared to that of a conventional parallel plate capacitor (PPC) are used, resulting in improved frequency offset and sensitivity of the sensor. Furthermore, a sensor tag was designed to operate at an 8.2 MHz electronic article surveillance (EAS) frequency range and the corresponding simulation results were experimentally verified. The IDC- and PPC-based capacitor designs were comprehensively compared. The proposed IDC sensor exhibits enhanced sensitivity of 10% in terms of frequency offset that is maintained over time, increased detection distance of 5%, and more than 20% increase in the quality factor compared to sensors based on PPC. The sensor’s performance as a urine detector was experimentally qualified. Additionally, it was shown experimentally that the proposed sensor shows a faster response to moisture. Both simulation and experimental data are presented and elucidated herein.

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Section: Discussionmentioning

confidence: 79%