• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.22 no.6
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• pp.69-74
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• 2022

Even after the drunk driving law was revised through the Yoon Chang-ho Act in 2019, the proportion of habitual offenders among all drunk drivers in 2021 was 4.7%, up 0.5% from 2018. In addition, drunk driving is not easily stopped due to the addiction of alcohol, and there is a high probability of recidivism in accidents as it is often driven again. Therefore, in this paper, to prevent this, when alcohol is measured using its own sensor rather than a manual police measure, the vehicle stops and related data such as the current location and time are automatically saved. Since it is not possible to develop directly on the car, this system was developed by converging various technologies and sensors such as Arduino board, Firebase, and GPS based on the IoT environment in consideration of the simulation environment.

• Analytical Science and Technology
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• v.12 no.3
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• pp.218-223
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• 1999

A single use, screen-printed sensor for the measurement of liquid phase ethanol was developed and its electrochemical performance was investigated. Disposable type edthanol sensor was fabricated by serially screen printing the carbon paste, silverd pasted and insulator inlon a polyester substrate to pattern working and reference electrode sites and electrical contact. Alcohol dehydrogenase(ADH) or alcohol oxidase(AOD) together with appropriate electron transfer mediators was immobilized on the working electrode. To improve the sensitivity and reproducibility of carbon paste electrode, some pretreatment procedures were applied and their resultant electrochemical performance was examined. The disposable type electrochemical ethanol sensor developed in this study conveniently determines the ethanol in liquid samples such as blood and in fermentation process.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.435-436
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• 2023

공유 전동킥보드는 현존 대중교통을 이용하기에 애매한 짧은 구간이나 단거리 이동에 적합하고, 특정 노선과 정류장이 정해져 있지 않아 기동성이 높고 자유로워 이용률이 매년 증가하고 있다. 하지만 늘어난 사용자만큼 사건·사고도 늘어나고 있다. 킥보드 전담 부서가 없어 단속의 미흡으로 인해 대중교통이 운행하지 않는 심야에 음주 상태에서 운전하여 사고가 나는 경우가 부지기수이다. 본 프로젝트는 사회적 문제로 대두되고 있는 전동킥보드 음주운전 사고를 방지하고자 아두이노 센서를 기반으로 한 알코올 농도측정으로 음주자의 대여를 사전에 차단하기 위한 기능을 포함하고 있는 애플리케이션이다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.01a
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• pp.297-298
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• 2022

현재 도로 위 차량은 다양한 기능이 탑재되어 있고, 이는 운전자의 편의와 안전을 위해 발전해왔다. 하지만 음주운전과 안전운전 불이행에 의한 교통사고는 꾸준히 발생하고 있으며, 이 사고율은 단순히 제도적 규제와 운전자의 주의만으로는 감소시키기 어렵다고 판단된다. 본 논문은 제도적인 규범만이 아닌 기계적인 차원에서의 음주운전 사고 예방과 안전운전 불이행 사고의 방지를 하기 위해 '음주측정 시동 및 안전운전 보조시스템'을 제안한다. 이러한 문제를 해결하고자 알코올 측정 센서를 통해 시동을 걸기 전 음주측정을 해 음주운전의 가능성을 차단하고 초음파 센서를 이용하여 전, 후·측방 감지를 하고 주변의 장애물과 운전자의 부주의 시 즉각적인 피드백을 제공해 안전운전 불이행 사고를 방지할 수 있다.

• Food Engineering Progress
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• v.14 no.1
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• pp.49-53
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• 2010

Surface plasmon resonance (SPR) which is utilized in thin film refractometry-based sensors has been concerned on measurement of physical, chemical and biological quantities because of its high sensitivity and label-free feature. In this paper, an application of SPR to detection of alcohol content in wine and liquor was investigated. The result showed that SPR sensor had high potential to evaluate alcohol content. Nevertheless, food industry may need SPR sensor with higher sensitivity. Herein, we introduced a nano-technique into fabrication of SPR chip to enhance SPR sensitivity. Using Langmuir-Blodgett (LB) method, gold film with nano-structured surface was devised. In order to make a new SPR chip, firstly, a single layer of nano-scaled silica particles adhered to plain surface of gold film. Thereafter, gold was deposited on the template by an e-beam evaporator. Finally, the nano-structured surface with basin-like shape was obtained after removing the silica particles by sonication. In this study, two types of silica particles, or 130 nm and 300 nm, were used as template beads and sensitivity of the new SPR chip was tested with ethanol solution, respectively. Applying the new developed SPR sensor to a model food of alcoholic beverage, the sensitivity showed improvement of 95% over the conventional one.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.1338-1341
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• 2021

현재 대한민국 운송업에서 두 번째로 큰 비율(19.2%)을 차지하고 있는 수상 운송업에서는 연간 많은 재해가 발생하고 있으며 그 손해는 4백억 원에 달한다. 본 연구는 수상 운송업에서의 재해율과 경제적 손실을 최소화하기 위해 신체 측정기기 및 항만 작업 분배시스템을 설계하였다. 신체 측정기기는 심박, 알코올, 적외선 온도 센서 등을 활용하여 작업자의 신체 정보를 측정한다. 이 결과를 아두이노로 전송한 뒤 사용자의 집중도와 피로도를 분석하여 적절한 작업 분배 서비스를 제공한다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.2
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• pp.123-128
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• 2010

ularly, a points of view Health-care system, it can reduce costs and efforts in order to management of patients. However, Health-care system keep a level of service for person and extends of hospital inner parts system. Although the rate of an addict grow by alcoholic but it is difficult to manage and diagnosis because of patient data gathering. Therefore in this thesis, it is proposed to patient data gathering and monitering method in u-zone. It can collect patient data by pulse, temperature and acceleration sensor and it can diagnosis correct based on emotion change data.

• Proceedings of the KIEE Conference
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• 1999.07g
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• pp.3265-3267
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• 1999

Capacitance-type alcohol gas sensors using porous silicon (PS) layer as sensitive film were fabricated to measure low alcohol gas concentration. Though sensors using porous silicon layer have show high sensitivity by large internal surface area, there is still much room for improvement to measure low breath alcohol concentration especially at room temperature. In this work, to discuss the response properties against exposure to organic vapor for breath alcohol measurements on the basis of experimental results. we measured the variation of the capacitance for the range of 0 to 0.5% alcohol concentration, and observed the improvement of sensitivity by illumination of UV light. In addition, the effect of CO2 and N2 gases involved commonly in exhaling breath was estimated, and the same procedure against methanol vapor was executed to compare qualitatively with the capacitance characteristics by alcohol vapor.

• Journal of the Korean Institute of Gas
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• v.18 no.2
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• pp.48-54
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• 2014

A unique optical waveguide structure is proposed to enhance the optical characteristics of alcohol screening sensors. This structure is then simulated. The structure consists of two elliptical waveguides that have a common focus to one side and has an IR source and detector at each of the other focal points of the ellipses. When the angle between the two elliptical waveguides is increased from 30 degrees to 90 degrees, the maximum level of irradiance is greatly decreased, falling from $2.23{\times}10^6 W/m^2$ to $5.74{\times}10^5W/m^2$. However, the diameter of the incident rays is at a minimum of 1.86mm and the total incident flux is less than 10% lower when compared to the structure at $90^{\circ}$. It can be seen from the simulation results that this structure might enhance the sensitivity of an optical gas sensor which has a large absorption wavelength.

• Journal of Biosystems Engineering
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• v.29 no.4
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• pp.323-328
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• 2004

A surface plasmon resonance (SPR) sensing system, which belonged to a family of thin film refractometry-based sensors, was fabricated to measure the alcohol contents in alcoholic beverages. In this study, a SPR owe was obtained by a photodiode array with 128 pixels and transformed into a refractive index which was calculated by means of the first moment of values below a baseline of 0.85. When the sensing system was applied to Soju, Cheonju, Igwaduju and Tacju highly linear relationships between the refractive index by SPR and the contents of alcohol were obtained. That is, the coefficients of determination in their linear models were 0.992, 0.933, 0.918 and 0.954, respectively. Meanwhile, the effect of sample preparations on the accuracy of measurement was analyzed. As for Soju and Tacju, the best calibration equations were obtained when no sample preparation was applied. The best calibration models for measurement of Cheonju and Igwaduju were obtained through the samples filtered by $C_{18}$ disks.