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김재천(Jaecheon Kim),서석현(Sukhyun Seo),전재욱(Jaewook Jeon),박기헌(Kiheon Park),유관호(Kwanho You) 대한전기학회 2006 정보 및 제어 심포지엄 논문집 Vol.2006 No.1
During last years, large investments have been directed to development and research of nano-techNoogical products like semiconductor, display panel, optic-fiber communication components, life techNoogy, and ultra-precision components. All quantitative measurements at nanometre scale should guarantees accurate results and high quality. Laser interferometer is one of most famous nanometre scale devices to be able to measure metre-scale distance with nanometre scale resolution, but it is easily affected by various error causes like geometrical, instrumental and environ-mental factor. On the other side, capacitive sensor is robust to above error factors, but it is able to measure relatively shorter distance, under 100㎛, than laser interferometer. New error correction method for laser interferometry using capacitive sensor will be introduced in this paper.
이지연(Jiyeon Lee),서석현(Sukhyun Seo) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
This paper suggests a method for estimate energy efficiency of 2WD electric vehicle. Braking force of front wheel and rear wheel are calculated with ideal distribution and regenerative braking force varied with SOC and velocity of vehicle. Considering these methods, this paper shows the result of simulation that estimate energy efficiency of electric vehicle and compare with result of real electric vehicle.
남수진(Sujin Nam),서석현(Sukhyun Seo) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
As the commercialization of autonomous vehicles is progressing rapidly, the function and stability of autonomous driving are becoming more important. Sensors used for autonomous driving are greatly affected by surrounding environment, so it is necessary to reduce errors caused by unstable sensor values and noise. In this paper we aim to improve a perception of camera and lidar for lane keeping and collision avoidance, which are core technologies for autonomous driving. To improve camera perception, a glare removal algorithm is used and a sliding window is used to increase the lane detection rate. To avoid collision, ROI is set and obstacles are detected by applying DBSCAN using LiDAR.
조현습(Hyunseup Jo),서석현(Sukhyun Seo) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
As of 2020, there were about 40,000 fires in Korea, resulting in the loss of over 2,000 people and approximately 600 billion won in property damage. In particular, in industrial facilities such as factories, it is easy to spread as a large-scale fire, and the damage is enormous. Therefore, in the event of a fire, it is very important to suppress the initial fire so as not to cause a bigger accident. However, when a fire breaks out, people inside the building start to get confused, which can cause the fire to spread and cause property damage and personal injury. Therefore, for the initial detection and suppression of fire on behalf of humans, autonomous driving to the point of fire and the ability to fire a throwing fire extinguisher at the recognized fire point are required. The robot manufactured for this purpose creates a map of the driving area in advance using Hector SLAM, an open source based on 2D lidar for indoor location recognition, and estimates the current location through sensing data. In addition, a fire detector capable of communication was produced in order to recognize fire and register the data in the server in real time. The robot subscribes to the fire data and finally sets the waypoint of the point where the fire detector is installed as the destination, and when it autonomously moves to the point, it recognizes the fire and launches a fire extinguisher.
GENIVI Platform를 이용한 Touch 기반 차량 공조 제어 시스템 개발
한상현(SangHyun Han),정진혁(JinHuk Jeong),서석현(SukHyun Seo) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
Recently, the infotainment market is actively moving in the domestic and overseas automobile markets. It is possible to reuse codes and functions through a single platform and implement the functions through a single controller as compared to the past, which controls many functions in the vehicle according to the technology. As a result, the increasing cost, the long development period, and the increasing royalties have been caused. In order to solve this problem, the automobile industry continues to commercialize the open source platform. We suggest how to use the Yocto Project. In addition, a touch-based vehicle air-conditioning control system was constructed using a vehicle infotainment platform. Through the results of this paper, we have developed a platform to develop next generation head unit. We will develop a head unit that controls various functions such as navigation and air conditioning controller by using functions provided by GENIVI Platform in the future.
정진혁(Jinhyuk Jeong),한상현(SangHyun Han),서석현(Sukhyun Seo) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
In this paper, through the document analyzing the software design work, it clarifies the work items according to the software design, the order and the structure and relationship of the design information handled in each design work, and the design order and design information to the design scenario and design form We propose a standardized model of design work. As an effort to improve software productivity, the need for standardization from the early stages of software development to design methods is increasing due to the development of continuous theories of software engineering and the spread of standardized techniques. Therefore, this study proposed a tool to develop software efficiently by performing standardization experiment of software design procedure.
자율주행 안정성 향상을 위한 인식 필터 설계 및 속도 제어 방법
장현수(Hyeonsoo Jang),송재민(Jaemin Song),김현수(Hyeonsoo Kim),서석현(Sukhyun, Seo) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
An important factor in developing self-driving cars is to ensure stability in driving. To do this, it is necessary to design a filter with good performance or implement an autonomous driving system by applying a function that is strong against external noise. In this paper, methods for improving the stability of autonomous driving are presented. When detecting lanes, a median filter is applied and a function to recognize only linear changes has been added. In addition, the vehicle does not deviate from the lane through speed control during steering. Using the position of the obstacle measured using the Lidar and the detected lane, it avoids the obstacle without leaving the lane. Crosswalk recognition must satisfy two conditions: pattern recognition and color detection. By using AR markers for parking, functions can be performed regardless of light, terrain, or obstacles.
정진혁(JinHyuk Jeong),한상현(Sang Hyun Han),김정태(Jeong Tae Kim),서석현(Sukhyun Seo) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
Using the smartphone application, IoT system designed for single-person households and elderly living alone. The main functions that can be provided are automatic and manual control of curtains, lights, dehumidifiers, temperature / humidity / illumination automatically / manually and in order to prevent the death of solitude, we added an internal CCTV and focused on checking the status of the inside of the house with the application of smart phone.