• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 춘계학술대회
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• pp.375-378
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• 2017

전 세계적으로 해운물류 안전 보안체계가 강화됨에 따라 국가물류보안 체계 구축을 위한 해운물류안전 보안 핵심기술 개발이 이루어지고 있다. 또한 미국에서 2018년 시행예정인 컨테이너 사전 100% 전수검사에 대응하기 위한 컨테이너 검색기의 핵심구성 요소인 Array 검출 System의 국산화 개발이 필요하다. 본 논문에서는 현재 해외제품을 대체할 Array 검출 system 중 자체 개발한 Digital Signal Processing Board에 대한 연구를 제안하고자 한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1998년도 제13차 학술회의논문집
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• pp.295-300
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• 1998

In this paper, a real time diagnostic algorithm fur estimating the impact location by loose parts is proposed. It is composed of two modules such as the alarm discrimination module (ADM) and the impact-location estimation module(IEM). ADM decides whether the detected signal that triggers the alarm is the impact signal by loose parts or the noise signal. When the decision from ADM is concluded as the impact signal, the beginning time of burst-type signal, which the impact signal has usually such a form in time domain, provides the necessary data fur IEM. IEM by use of the arrival time method estimates the impact location of loose parts. The overall results of the estimated impact location are displayed on a computer monitor by the graphical mode and numerical data composed of the impact point, and thereby a plant operator can recognize easily the status of the impact event. This algorithm can perform the diagnosis process automatically and hence the operator's burden and the possible operator's error due to lack of expert knowledge of impact signals can be reduced remarkably. In order to validate the application of this method, the test experiment with a mock-up (flat board and reactor) system is performed. The experimental results show the efficiency of this algorithm even under high level noise and potential application to Loose Part Monitoring System (LPMS) for improving diagnosis capability in nuclear power plants.

• 한국항공우주학회지
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• 제41권10호
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• pp.805-812
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• 2013

스마트무인기의 비행제어컴퓨터는 탑재장비와의 입/출력 신호처리, 비행제어법칙 연산 그리고 고장진단 및 이중화 기능 등이 구현된 비행운용프로그램이 탑재되어 있다. 비행운용프로그램은 PowerPC 755 프로세서와 VxWorks 5.5 실시간운영체제 환경에서 개발되었다. 비행운용프로그램은 메모리 참조 모듈, 탑재장비 입/출력 신호처리 모듈 그리고 비행제어법칙 모듈로 구성되었고 각각의 모듈은 계층 구조로 설계되었다. 메모리 참조 모듈과 신호처리 모듈은 벤치 테스트를 통해 검증되었고, 비행제어법칙 모듈은 시뮬레이션 시험, 지상통합시험, 안전줄 시험 그리고 비행시험을 통해 검증되었다. 본 논문에서는 비행운용프로그램의 개발환경, 소프트웨어 구조 그리고 검증 및 관리방법에 대해서 기술하였다.

• 대한의용생체공학회:의공학회지
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• 제31권4호
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• pp.292-301
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• 2010

To restore visual sensation of blind patients, we have proposed a fully implantable retinal prosthesis comprising an three dimensionally (3D) stacked retinal chip for transforming optical signal to electrical signal, a flexible cable with stimulus electrode array for stimulating retina cells, and coupling coils for power transmission. The 3D stacked retinal chip is consisted of several LSI chips such as photodetector, signal processing circuit, and stimulus current generator. They are vertically stacked and electrically connected using 3D integration technology. Our retinal prosthesis has a small size and lightweight with high resolution, therefore it could increase the patients` quality of life (QOL). For realizing the fully implantable retinal prosthesis, we developed a retinal prosthesis module comprising a retinal prosthesis chip and a flexible cable with stimulus electrode array for generating optimal stimulus current. In this study, we used a 2D retinal chip as a prototype retinal prosthesis chip. We fabricated the polymide-based flexible cable of $20{\mu}m$ thickness where 16 channels Pt stimulus electrode array was formed in the cable. Pt electrode has an impedance of $9.9k{\Omega}$ at 400Hz frequency. The retinal prosthesis chip was mounted on the flexible cable by an epoxy and electrically connected by Au wire. The retinal prosthesis chip was cappted by a silicone to pretect from corrosive environments in an eyeball. Then, the fabricated retinal prosthesis module was implanted into an eyeball of a rabbit. We successfully recorded electrically evoked potential (EEP) elicited from the rabbit brain by the current stimulation supplied from the implanted retinal prosthesis module. EEP amplitude was increased linearly with illumination intensity and irradiation time of incident light. The retinal prosthesis chip was well functioned after implanting into the eyeball of the rabbit.

• 한국정보통신학회논문지
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• 제15권2호
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• pp.339-346
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• 2011

기존의 RF 통신 기반의 WPAN 환경에서는 센서에 대한 시스템 초기화 시 송신 전력의 출력값을 설정하고 고정적으로 송신하므로 과도한 송신 전력에 의한 배터리 수명의 저하와 센서간의 간섭 문제가 발생한다. 따라서 본 논문에서는 이러한 문제의 해결을 위하여 각각의 센서들이 자신의 수신 세기(RSSI)에 따라 상대에 대한 송신 전력을 적절히 제어하여 전력 소모를 감소하는 저전력 송신 방법 및 프레임워크를 제안한다. 제안 시스템은 센서 네트워크 내에서 주변 센서의 송신 강도에 의해 연결된 센서의 수신 세기에 따라 송신 전력을 적절히 제어하여 전력 소모를 감소하는 방법을 제안한다. 본 논문에서 제안한 프레임워크는 신호 수신 모듈, 신호 송신 모듈, 송신 전력 탐색 모듈, 송신 전력 관리 모듈 그리고 데이터 송신 모듈을 포함한다.

• Journal of electromagnetic engineering and science
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• 제16권4호
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• pp.225-228
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• 2016

KRISS-V, a V-band millimeter-wave source module for a primary RF power standard and calibration system developed by the Korea Research Institute of Standards and Science is here presented. The output power of KRISS-V is several times higher than that of commercial amplifier/multiplier chains and is highly stable (the standard deviations of output power are less than 0.01% in the worst case). The spectral purity of KRISS-V is high enough to consider it a single-tone signal generator. We also added programmable attenuation capability to KRISS-V for remote power control. Moreover, the in-house source module is cost-effective and adaptable to various measurement schemes. The structure of the model as well as detailed component information are introduced so that it can be reproduced.

• 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.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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• pp.1088-1092
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• 2002

This paper introduces that domestic animals can be effectively administered with an individual recognition system. The system was constructed in original code transmitter, receiver, personal computer, micro-processor, and RS485 telecommunications module. In the individual recognition system. the signal including encoded information about a milk-cow was transmitted from an original code transmitter to a micro-processor through RS485 telecommunications module. The transmitted signal was successfully displayed in a personal computer.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.468-471
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• 2005

The Air Quality Sensor(AQS), located near the fresh air inlet, serves to reduce the amount of pollution entering the vehicle cabin through the HVAC(heating, ventilating, and air conditioning) system by sending a signal to close the fresh air inlet door/ventilation flap when the vehicle enters a high pollution area. One chip sensor module which include above two sensing elements, humidity sensor and bad odor sensor was developed for AQS (air quality sensor) in automobile. With this sensor module, PIC microcontroller was designed with back propagation neural network to reduce detecting error when the motor vehicles pass through the dense fog area. The signal from neural network was modified to control the inlet of automobile and display the result or alarm the situation. One chip microcontroller, Atmega128L (ATmega Ltd., USA) was used. For the control and display. And our developed system can intelligently detect the bad odor when the motor vehicles pass through the polluted air zone such as cattle farm.

• 한국전자통신학회논문지
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• 제6권6호
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• pp.981-986
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• 2011

본 논문에서는 인체의 혈중산소포화도(SpO2) 및 맥파 신호를 측정하기 위한 모듈과 PC에 무선으로 전송할수 있는 통신모듈을 개발하였다. 또한 응급이송 시 전송된 혈중산소포화도 및 맥파 신호를 의료진에게 정보 손실 없이 다양한 형태의 데이터 및 그래프로 제공할 수 있도록 하는 디스플레이 프로그램을 개발하였다. 이러한 시스템은 원격의료에 적합하게 활용될 수 있으며, 의료법의 개정과 더불어 새로운 시장을 창출할 수 있을 것으로 기대된다.