• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 학술대회 논문집 정보 및 제어부문
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• pp.264-266
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• 2005

Recently, on-line diagnosis methods through wired and wireless networks are widely adopted in the diagnosis of industrial Electric Facilities, such as generators, transformers and motors. Also smart sensors which includes sensors, signal conditioning circuits and micro-controller in one board are widely studied in the field of condition monitoring. This paper suggests an self-powered system suitable for condition-monitoring smart sensors, which uses parasitic vibrations of the facilities as energy source. First, vibration-driven noise patterns of the electric facilities are presented. And then, an electromagnetic generator which uses mechanical mass-spring vibration resonance are suggested and designed. Finally energy consumption of the presented smart sensor, which consists of MEMS vibration sensors, signal conditioning circuits, a low-power consumption micro-controller, and a ZIGBEE wireless tranceiver, are presented. The usefulness and limits of the presented electromagnetic generators in the field of electric facility monitoring are also suggested.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2014년도 추계 학술논문 발표대회
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• pp.197-198
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• 2014

The concrete work of bridge decks is performed in a high place, which may reduce safety and productivity. In addition, the conventional method for deck forms require a great deal of manpower, and a form (sheathing) board is damaged when removed after curing. As a result, the concrete deck work of bridge construction becomes the cause of delayed construction and increased cost. To solve these problems, SMART form, a system form, is developed. SMART form is a temporary device for easier installation and removal, by mounting it to the lower flange of a bridge girder and using a mechanical behavior of the form system for deck concrete pouring. For stable installation and removal of the developed SMART form, geometric behaviors should be analyzed to prove its validity. Furthermore, the validity of geometric behaviors when the SMART form size is altered in response to the various arrangement of bridge girders should be proved. Thus, the study is intended to analyze the geometric validity of the form system for bridge deck concrete pouring. The structural stability of the form system for bridge deck concrete pouring can be secured, which will be applied in the field.

• 한국컴퓨터정보학회논문지
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• 제27권3호
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• pp.99-104
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• 2022

본 논문에서는 기후변화에 능동적으로 대처하여 빨래 감을 자동으로 제어하는 베란다용 스마트 빨래 건조 시스템을 처음으로 개발하고 소개하고자 한다. 개발된 스마트 빨래 건조 시스템은 앱을 통해 빨랫감 위치 정보를 받은 후, 위치 정보에 따른 온도, 습도 등의 기상청 데이터를 통해 기후 변화를 실시간으로 감지하여 비가 오는 상황이 발생할 경우 건조대 위에 빨래 감을 자동으로 제어한다. 아두이노 습도 센서와 기상청 Open-API 를 통해 기상 정보를 취득하고 이는 라즈베리파이가 스위치 봇을 제어하는데 이용된다. 사용자 인터페이스는 Blynk를 사용하였으며, 스위치 봇은 빨랫감을 제어한다. 제안 시스템은 기상 악화를 감지하고 원격지에 있는 빨래감을 자동으로 제어하여 비 피해를 예방해줄 수 있다.

• 정보학연구
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• 제8권4호
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• pp.91-102
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• 2005

In this paper, development of embedded system based on Windows CE 5.0 which released recently is studied. Embedded softwares for the target board using S3C2410A SOC based on ARM920T core are composed of (1) BSP(Board Support Package) contains an OAL(OEM Adaptation Layer) which includes a boot loader for initializing and customizing target hardware, device drivers, and a corresponding set of configuration files (2) Windows CE 5.0 kernel (3) SDK and MP3 test application. Particularly, PB(Platform Builder) provides the efficient functions to build, test and debug the BSP and CE kernel. It is looked forward to being widely spread that Windows CE 5.0 will be utilized at smart devices such as PMP, CNS and DMB phone which inevitably require a display device.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 춘계학술대회논문집
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• pp.319-324
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• 2005

The interface between host processor and the ShortStack Micro Server may be a Serial Communication Interface(SCI). The LonWorks control module with a high performance is developed, which is composed of the 8 bit PIC Microprocessor for host processor and the smart neuron chip for the ShoretStack Micro Server. This intelligent control board is verified as proceeding the various function tests from experimental system with an boost pump and inverter driving systems. It is also confirmed that the developed control module provides stably 0-10VDC linear signal to the input signal of inverter driving system for varying the induction motor speed. Thus, the experimental results show that the fabricating intelligent board carried out very well the various functions in the wide operating ranges of boost pump system. This developed control module expect to apply to industrial fields to require the comparatively exact control and monitoring such as multi-motor driving system with inverter, variable air volume system and the boost pump water supply systems.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
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• pp.188-190
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• 2005

In this study, a smart motor control and monitoring system is developed with an embedded board where Intel PXA255B CPU is mounted. Linux is ported into the embedded board as RTOS(Real Time Operating System), and the environment which communicate with a motor driver through serial protocol and is capable of controlling and monitoring the motor in real time is built in the system. A user friendly GUI is developed for the convenient operation of the system. Also, the environment which is able to control and monitor the motor driver remotely is built in the system using TCP/IP protocol.

• Smart Structures and Systems
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• 제6권5_6호
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• pp.525-543
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• 2010

Testing and validation processes are critical tasks in developing a new hardware platform based on a new technology. This paper describes a series of experiments to evaluate the performance of a newly developed MEMS-based wireless sensor node as part of a wireless sensor network (WSN). The sensor node consists of a sensor board with four accelerometers, a thermometer and filtering and digitization units, and a MICAz mote for control, local computation and communication. The experiments include calibration and linearity tests for all sensor channels on the sensor boards, dynamic range tests to evaluate their performance when subjected to varying excitation, noise characteristic tests to quantify the noise floor of the sensor board, and temperature tests to study the behavior of the sensors under changing temperature profiles. The paper also describes a large-scale deployment of the WSN on a long-span suspension bridge, which lasted over three months and continuously collected ambient vibration and temperature data on the bridge. Statistical modal properties of a bridge tower are presented and compared with similar estimates from a previous deployment of sensors on the bridge and finite element models.

• 한국항공우주학회지
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• 제45권2호
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• pp.154-162
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• 2017

인공위성의 시스템 설계 및 운용에 대한 이해증진을 목적으로 국내에서는 2012년을 시작으로 매년 캔위성 경연대회가 개최되고 있다. 본 논문에서 제안한 캔위성은 2016년 경연대회에 출전한 SCSky(Smart Call from the Sky) CanSat으로, 주요임무는 캔위성에 탑재된 스마트폰을 이용하여 영상통화 연결을 통해 위성체 내 외부 및 비행영상 획득을 목표로 하고 있으며, 임무 구현을 위해 형상기억합금 와이어를 적용한 원격터치시스템을 개발하였다. 아울러 부가적인 임무로 비행 임무동안 보다 넓은 범위의 지상관측영상 획득을 목적으로 형상기억합금스프링을 적용한 광역스캔카메라 메커니즘을 개발하였다. 본 논문에서는 상기 캔위성에 대한 임무를 비롯해 개발 탑재체 및 캔위성 시스템 소개, 최종 비행시험결과에 대하여 서술하였다.

• 유공압시스템학회논문집
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• 제8권4호
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• pp.17-23
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• 2011

Proportional control solenoid is a type of modulating valve that can continuously control the valve position with magnetic force of solenoid. Recent microcontroller based digital servocontroller for proportional valve is being developed toward the smart valve with additional features such as enhanced control algorithm for finer process and intelligent on-board diagnosis for maintenance. In this paper, development of servocontroller network control with CAN bus which is free from problems of security and network traffic jam is presented. Design of network control system includes modes of communication between master and slave, assignment of 29bit message identifier and message objects, transaction of communication sequence, etc. Monitoring function and control experiments for remote valve through CAN network prove the extended function of smart valve control system.

• 산업기술연구
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• 제17권
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• pp.95-101
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• 1997

A smart pressure measurement system is described, which provides a precise A/D conversion and is highly suitable for communication with microprocessors. In order to avoid unstable problems of remote pressure sensing we have developed a new interface board which performs the A/D conversion and smart signal processing of the measured pressure data. Serial communication software which is based on ASCII code commands is also developed to process initial setup and calibration functions as well as multi-drop communication with PC. The test and evaluation of the proposed system has been shown as having the better performance compared to the other types of existing pressure measuring systems and will give good applications to the industrial use where a highly precision remote sensing is needed.