• Journal of IKEEE
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• v.21 no.4
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• pp.358-367
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• 2017

Advanced Driver Assistance Systems(ADAS), such as Front Collision Warning System (FCWS) are currently being developed. FCWS require high processing speed because it must operate in real time while driving. In addition, a low-power system is required to operate in an automobile embedded system. In this paper, FCWS is implemented in CPU-FPGA architecture in embedded system to enable real-time processing. The lane detection enabled the use of the Inverse Transform Perspective (IPM) and sliding window methods to operate at fast speed. To detect the vehicle, a Convolutional Neural Network (CNN) with high recognition rate and accelerated by parallel processing in FPGA is used. The proposed architecture was verified using Intel FPGA Cyclone V SoC(System on Chip) with ARM-Core A9 which operates in low power and on-board FPGA. The performance of FCWS in HD resolution is 44FPS, which is real time, and energy efficiency is about 3.33 times higher than that of high performance PC enviroment.

• Industrial Engineering and Management Systems
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• v.8 no.2
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• pp.109-120
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• 2009

As the use of 3DCAD data became widespread in designing products in manufacturing, attempts have been made to shorten lead time and reduce cost of production preparation utilizing 3DCAD data for launching assembly lines. In order to create assembly plans not only efficient but easy for operators to operate ('easy-to-operate'), this study presents approaches, methods, and systems for creating 3DCGAs (3 Dimensional Computer Graphic Animations) which automatically utilize a prototype-free production preparation methodology. Characteristics of this study include that it proposes the methodology for creating assembly operation 3DCGAs automatically, for all the possible assembly operations corresponding each of the possible assembly sequences first. Using the created 3DCGAs, the study next considers assembly methods by evaluating how easy or 'operator friendly' they are in implementing, and devises tools or jigs to be used, and plans efficient assembly line organization. The concept of the methodology was formed by focusing on the value-adding assembly steps at which parts turn into products directly. The study also validates the effectiveness of the presented methodology by employing the methods used in actual production preparation process in businesses, and proves that an efficient assembly line can be organized in a shorter period of time utilizing the developed system and by preparing easy-to-operate and efficient plans in 3DCGAs at the design stage.

• Journal of the Korea Convergence Society
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• v.9 no.11
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• pp.99-105
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• 2018

As the Internet of Thing(IoT) technology recently has become a big issue, many researches have been carried out to link the Internet of things with the home network system. Various home network systems are being implemented to connect many devices used in the home with the Internet and to control and operate the devices using a smart phone. However, existing protocols that operate on the Internet are not suitable for a limited environment such as low power, low capacity, and low performance. Therefore, the Internet Engineering Task Force (IETF) Working Group proposed the CoAP/6LoWPAN technology as a suitable protocol for internetworking IoT devices with the Internet in a limited environment and adopting it as a standard. In this paper, a smart home network system is implemented to control and operate various IoT devices in a home using CoAP/6LoWPAN in mobile environment. The performance of HTTP and CoAP such as data transmission time, data transmission rate is analyzed.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.527-530
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• 2016

This paper presents curvature-compensated reference circuits operating under low-voltage condition and achieving low-power consumption with $0.35-{\mu}m$ standard CMOS process. The proposed circuit can operate under less than 1-V supply voltage by using MOS transistors operating in weak-inversion region. The simulation results shows a low temperature coefficient by using the proposed curvature compensation technique. It generates a graph-shape temperature characteristic that looks like a sine curve, not a bell-shape characteristic presented in other published BGRs without curvature compensation. The proposed circuits operate with 0.9-V supply voltage. First, the voltage reference circuit consumes 176nW power and the temperature coefficient is $26.4ppm/^{\circ}C$. The current reference circuit is designed to operate with 194.3nW power consumption and $13.3ppm/^{\circ}C$ temperature coefficient.

• Journal of the Korea Society of Computer and Information
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• v.27 no.11
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• pp.139-145
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• 2022

As products that consumers want become more diverse, the types of automation equipment are becoming more diverse and advanced to produce competitive products. In general, equipment is manufactured with built-in interface devices (HMI) for users so that operators can efficiently monitor and operate equipment quickly. Because HMI devices are connected to various industrial controllers, elements such as communication protocols of various controllers must be understood and set up in the design stage. Non-experts not only have difficulty choosing compatible items among various protocols, but also have limitations in integrating and operating on one device because screens and settings are statically assigned. This paper proposes a model that can scan information such as equipment ID and communication protocol with QR code using a mobile device, access industrial controller, and remotely operate the displayed equipment screen. The proposed model is expected to increase efficiency in inspection and management of automated equipment as it can easily set, monitor, and operate the communication environment of various automated equipment using one mobile device.

• Journal of the Korean Professional Engineers Association
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• v.33 no.4
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• pp.53-58
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• 2000

Within 10years, it will be possible to integrate 10B transistors on a single chip microprocessor which wilt operate far beyond GHZ, and it will execute about 20-200 instructions per clock cycle from widely variable instruction streams leveraging SMT(Simultaneous Multithreading) technology . Also it will decouple the current legacy X86 binary compatibility by translation layer such as code morphing technology.

• Proceedings of the KSR Conference
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• 2003.10b
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• pp.67-72
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• 2003

Drainage system in railroad has a very important role to operate the system. Drainage system should be carefully considered in design and construction due to a difficult access to the system during operation. In this paper, recent case histories were presented, which showed how an improper drainage system affects the railroad operation.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.11a
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• pp.725-728
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• 2000

Air hoist system has been using in the industry. In gradually, the system of function was developing, but system was not enough compensation for leakage. In this paper, developed the anti-leakage system with stability and convenience of operate.

• 제어로봇시스템학회:학술대회논문집
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• 1989.10a
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• pp.727-730
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• 1989

Tokyo dome is Japan's first air dome. The roof of the dome is supported by air pressure. The centralized control system (YOKOGAWA's DCS : CENTUM and YEWPACK) is applied to automatically regurate the air pressure. The control system acquires signals from sensors positioned throughout the stadium and operate 36 fans to blow air into the dome. Great emphasis is placed on the reliability and safety of the system.

• Progress in Medical Physics
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• v.4 no.1
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• pp.23-28
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• 1993

Radiation physics quality programs operate in a data rich enviranment. In quality control/quality assurance of treatment planning systems, quality indicators include isodose planning system, isodose calculation system, data set and equipment.