물 섭취 장려를 위한 음수량 측정 가능한 커패시터 센서 개발 = Development of a Water Level Sensor Using Capacitive Sensor to Encourage People to Drink Plenty of Water

다국어 초록 (Multilingual Abstract)

Drinking water has been known that not only for sustain the human life, also giving many health-giving benefits. According to the survey from World Health Organization (WHO), in South Korea, male and female adults drink water about 945 ml and 766 ml individually per day that is much lower than the recommended guideline 1.5 L to 2 L. To encourage people to drink plenty of water every day, this paper presents a non-invasive water level measurement capacitive sensor to measure the volume of the water in the cup automatically. Before the experiment, the FEA (Finite Element Analysis) simulation was performed to verify the idea feasibility and find the optimized sensor shape design. Based on the simulation results, the sensor was manufactured and attached to the outside of a plastic cup for the sensor performance test. Through adding the water into the cup, the capacitance variation of the designed sensor was observed by a LCR meter and the results were compared with the simulation results. As the experimental results shown, the proposed capacitive sensor is able to accurately measure the water level in the cup by calculated the capacitance varied as the water level varied. In the future, the sensor will be improved and implemented into developing a smart cup.

국문 초록 (Abstract)

물 섭취는 우리 몸에 여러 이점을 가져다준다. 세계 보건기구에 따르면 성인의 하루 물 섭취 권고 량은 1.5L~2L이다. 하지만 국민영양조사 결과에 따르면 우리나라 성인의 하루 물 섭취량은 남성은 945ml, 여성은 766ml 이다. 이는 하루 물 섭취 권고 량보다 2~3배 정도 적은 양이다. 이에 본 논문에서는 커패시터 센서를 이용하여 물 섭취를 위한 센서 개발을 제시한다. 최적화된 센서를 설계하기 위해 유한요소해석(FEA)을 이용한 시뮬레이션을 통해서 센서의 실현가능성을 확인 하였다. 센서는 시뮬레이션 결과에 따라 제작되고, LCR미터를 이용하여 제작된 센서를 검증 하였다. 센서의 측정값은 물의 양이 증가 할수록 값이 커졌고, 센서의 크기가 클수록 정전용량의 값의 크기가 증가 하였다. 제안하는 센서는 추후 물 섭취를 위한 스마트컵 개발에 사용될 것이다.

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