• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.6
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• pp.65-71
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• 2019

Conventional methods of measuring ground resistance and ground resistance field measurement are used to measure voltage drop according to the resistance value of the site by applying current by installing a constant interval of measurement electrode. If the stratified structure of the site site is unique, errors in boundary conditions will occur in the event of back acid and the analysis of the critical ground resistance in the ground design will show much difference from simulation. This study utilizes the Arduino module and smart ground measurement technology in the convergent information and communication environment to develop a reliable smart land resistance measuring device even if the top layer of land is unique, to analyze the land resistance and accumulate data to predict the change in the age of the land. Considering the topographical characteristics of the site, we propose a ground resistance measuring device and its method of measuring ground resistance so that the auxiliary electrode can be installed by correctly positioning the angle and distance in measuring ground resistance. Not only is ground resistance value obtained through electrodes installed to allow accurate ground resistance values to be selected, but it can also be used as a useful material for installing electrical facilities in similar areas. Moreover, by utilizing reliable data and analyzing the large sections of the site, a precise analysis of the site, which is important in ground design as well as construction cost, is expected to be used much in ground facility design such as potential rise.

• Journal of the Society of Disaster Information
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• v.17 no.4
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• pp.684-693
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• 2021

Purpose: The purpose is to establish a safe facility environment from abnormal voltages such as lightning by developing a smart land resistance measuring device that can acquire real-time land resistance data using Arduino. Method: This paper studied design models and application cases by developing a land resistance acquisition and analysis system with Arduino and a power line communication (PLC) system. Some sites in the wind power generation complex in Gyeongsangnam-do were selected as test beds, and real-time land resistance data applied with new technologies were obtained. The electrode arrangement adopted a smart electrode arrangement using a combination of a Wenner four electrode arrangement and a Schlumberger electrode arrangement. Result: First, the characteristic of this technology is that the depth of smart multi-electrodes is organized differently to reduce the error range of the acquired data even in the stratigraphic structure with specificity between floors. Second, IT convergence technology was applied to enable real-time transmission and reception of information on land resistance data acquired from smart ground electrodes through the Internet of Things. Finally, it is possible to establish a regular management system and analyze big data accumulated in the server to check the trend of changes in various elements, and to model the optimal ground algorithm and ground system design for the IT convergence environment. Conclusion: This technology will reduce surge damage caused by lightning on urban infrastructure underlying the 4th industrial era and design an optimized ground system model to protect the safety and life of users. It is also expected to secure intellectual property rights of pure domestic technology to create jobs and revitalize our industry, which has been stagnant as a pandemic in the post-COVID-19 era.

• Proceeding of EDISON Challenge
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• 2017.03a
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• pp.534-538
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• 2017

There are three types of robots that move on the ground classified as drivetrain. Wheels, tracks and Legs. Wheels and tracks are much easier to construct and control, but they have problems passing through obstacles like people. This paper discusses the design of line tracing using Theo Jansen, one of multi-legged walking mechanism. In order to increase the moving speed, the Jansen mechanism is designed by maximizing the objective variable as GL (Ground Length), GAC (Ground Angle Coefficient). In this project, only three sensors were attached and Arduino was used for optimal control of the motor using the sensor values.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.1
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• pp.203-209
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• 2019

In this work, a new land-specific resistance measuring device (GM) and a measuring probe (Grounding Rod) are connected to the WENNER quadrant as power-line communication (PLC). In groups of two (P1,P2) probes, five to ten probes are installed in series on the ground at intervals of 1m, 2m, 4m, 8m, and 16m, respectively. If the PLC signal from the GMD is detected by the receiver of the Probe 1 (P1) for measurement, the minute voltage and current for measurement flow from the PSD (power supply) attached to the probe to the ground, and then, through the soil between P1 and P2, enters the Probe 1 (P2). The resistance value is then measured by the principle of voltage drop due to ground resistance. Measure the earth resistance every T seconds up to 1 trillion and store the measured data on the Arduino Server mounted on the main equipment. Stored measurement data can be derived from formulas by Ohm's Law and from inherent resistance (here,). Data obtained in real time will be linked to CDGES programs installed on Main PC, enabling data analysis and real-time monitoring of the ground environment on land. In addition, a three-dimensional display is possible with 3D graph support by identifying seasonal characteristics such as temperature and humidity of land (soils). The limitations of the study will require specific application measures of Test Bed for commercial access to a model that has been developed and operated experimentally.

• Proceeding of EDISON Challenge
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• 2017.03a
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• pp.554-559
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• 2017

본 논문은 얀센 메커니즘을 이용한 라인트레이서를 빠르고 정확하게 주행하게 하기 위한 연구를 토대로 작성되었다. 설계변수는 다리 링크길이에 따른 GL(Ground Length)의 크기, 로봇의 크기, 센서의 위치와 개수 그에 따른 Arduino cording으로 결정하였다. 연구는 이 설계변수들과 결과값의 상관관계를 예측하고 실험을 통해 검증하는 방식으로 진행되었다.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.69-69
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• 2017

최근 여러 분야에서 드론에 대한 관심도가 높아짐에 따라, 하천분야에서도 다양한 연구에 드론이 활용하고 있다. 드론관련 기술의 발전으로 GPS와 같은 첨단 기술이 탑재되어 사용자에게 여러가지 정보를 제공하며, 조작 또한 간단하여 누구나 쉽게 활용할 수 있다. 그리고 무엇보다도 사람이 접근하기 힘든 지역을 쉽게 촬영할 수 있다는 큰 장점을 가지고 있다. 본 연구의 목적은 드론을 기반으로 표면영상유속측정법을 적용시켜 하천의 표면유속을 효율적으로 측정하는 것이다. 표면영상유속측정법은 카메라로 촬영된 영상을 이용하여 표면유속을 도출하기 때문에 촬영된 영상이 무엇보다도 중요하다. 하지만 드론으로 촬영된 영상들은 아무리 정지비행을 잘하더라도 필연적으로 영상에 흔들림이 존재한다. 이를 해결하기 위해 본 연구에서는 흔들린 영상에 대하여 형태 정합법에 의해 보정을 하였으며, 이는 가장 핵심적인 기술이라 할 수 있다. 형태 정합법에 의한 영상 보정 과정은 고정된 표정점을 영상에서 추적한 뒤, 기준 영상의 표정점과 보정 영상의 표정점이 일치하도록 보정하였다. 영상 보정 후 영상 처리와 분석프로그램을 통하여 유속을 도출한다. 기존의 표면영상유속측정법에서는 표정점을 설치한 후 각 표정점마다 측량을 실시하여 좌표를 측정하였다. 이는 한국건설기술연구원 안동하천실험센터와 같이 이상적인 실험을 진행할 수 있는 환경에서는 문제가 없다. 하지만 실제 하천에서 표면유속측정 시 하천의 폭, 주변 환경 등의 영향으로 측량작업에 많은 어려움이 있다. 이를 해결하기 위해 본 연구에서는 Arduino와 GPS센서를 이용하여 표정점을 구성하였다. Arduino와 GPS 센서를 이용하면 각 표정점들의 좌표를 노트북에서 실시간으로 자동으로 확인할 수 있다. GPS 센서의 측정 오차에 따라 관측 오차가 다소 존재하지만, 실제 측량을 할 때와는 비교할 수 없을 정도로 신속하게 표정점의 좌표를 구할 수 있다. 이를 바탕으로 실험 하천에 대해 적용한 결과 기존의 방법에 비하여 간편하고 빠르게 표면유속측정을 수행할 수 있었으며, 표면유속측정값 또한 만족스러운 결과를 얻을 수 있었다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.275-276
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• 2023

국토교통부는 공항의 지상조업 근로자 근무환경을 개선하기 위하여 2019년 11월부터 40개 과제를 발굴·시행하는 등 노력해 왔으나, 근원적인 안전관리체계 개선이 필요하다는 판단에 따라, 노조와 지상조업사 등 관계기관과 간담회를 통해 수렴한 의견을 바탕으로 국토교통부는 승객이동, 항공기 견인 등 항공운항의 필수 역할을 하는 지상조업의 서비스 및 안전성을 높이기 위해 '지상조업 안전관리 강화방안'을 수립했다. 본 논문은 공항에서 지상조업 시 안전하고 신속하게 할 수 있도록 하는 '공항용 원격 주행 멀티카트' 기술을 제안한다. 현장이 아닌 컨트롤러를 이용한 원격으로 주행하여 지상조업자의 안전을 보장하고, 카트에 멀티파츠를 장착하여 지장조업 장비의 유지 보수를 편리하게 관리하며 라이다 센서, 카메라, 적외선 센서 등을 이용하여 장애물을 피하는 멀티카트를 구현하여 공항 지상조업의 발전을 선도할 것이다.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.2
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• pp.347-354
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• 2021

In the equipment industry such as chemical plants, high temperature, high pressure, and toxic fluids move between various facilities through piping. The movement and damage of pipes due to changes in the surrounding environment such as temperature changes, vibrations, earthquakes, and ground subsidence often lead to major accidents involving personal injury. In order to prevent such an accident, various types of expansion joints are used to absorb and supplement various shocks applied to the pipe to prevent accidents in advance. Therefore, it is very important to measure the deformation of the used expansion joint and predict its lifespan to prevent a major accident. In this paper, the deformation of the expansion joint was understood as a kind of motion, and the change was measured using a Hall Effect Sensor and a 9-Axis Sensor. In addition, we studied a system that can predict the deformation of expansion joints by collecting and analyzing the measured data using a general-purpose microcomputer (Arduino Board) and C language.