• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제5권12호
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• pp.635-640
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• 2016

생산 시스템의 신뢰도와 공정에서의 품질관리는 수익과 직결되는 중요한 요소이다. 이런 이유로 M2M 디바이스 레벨에서 데이터를 획득하는 방법 그리고 그것을 응용하여 신뢰도 및 품질 등과 연결하는 연구에서 최근 많은 성과를 보이고 있다. 본 논문은 이러한 연구 결과의 연장으로 획득한 데이터의 처리방법과 결과에 관한 것이다. 일반적으로, 센서 데이터와 같은 미세한 차이를 가지는 신호를 이용하여 제품의 품질을 식별하는 것은 기존의 통계적인 방법에서는 어렵다. 그러나 최근 기계 공정에서 정보를 실시간적이고 즉시적으로 처리를 해야 하는 요구가 증대되고 있다. 특히 사출성형 공정의 경우 프로세스가 짧은 Cycle 갖고 있어 프로세스의 진행과 동시에 제품의 양-불량을 판별할 수 있는 방법이 필요하다. 본 논문은 Kalman Filter를 적용하여 사출공정의 센서 데이터를 실시간적으로 처리하여 제품의 상태를 판단할 수 있는 방안을 제시한다.

• 한국군사과학기술학회지
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• 제20권2호
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• pp.187-196
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• 2017

The size of raw data has dramatically increased due to the recent trend of Synthetic Aperture Radar(SAR) development plans for high resolution and high definition image acquisition. The large raw data has an impact on satellite operability due to the limitations of storage and transmission capacity. To improve the SAR operability, the SAR raw data shall be compressed before transmission to the ground station. The Block Adaptive Quantization (BAQ) algorithm is one of the data compression algorithm and has been used for a long time in the spaceborne SAR system. In this paper, an optimization method of BAQ threshold table is introduced using real SAR raw data to prevent the degradation of signal quality caused by data compression. In this manner, a new variation estimation strategy and a new threshold method for block type decision are introduced.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 A
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• pp.122-124
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• 2000

As the complexity of power systems increases, especially in the case of multiple faults or incorrect operation of protective devices, fault diagnosis requires new and systematic methods to the reasoning process, which improves both its accuracy and its efficiency. Therefore this paper proposes a method of the modeling of protection systems and fault diagnosis in power systems using Fuzzy Petri Nets (FPN). The proposed method can reduce processing time and increase accuracy when compared with the traditional methods. And also this method can cover online processing of real-time data from SCADA (Supervisory Control and Data Acquisition).

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.1930-1936
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• 2010

Because of the environmental matters the importance of the city railroad is as time goes by increasing. The case of obstacle of the power equipment which supplies electric power to city railroad will occur social and economical enormous loss. Thus, I studied on the preventing method in advance which makes it possible for us to maintain facilities efficiently. The main check points of the power facilities are voltage, current, humidity, partial discharge, move current. These points are gathered by sensor and transmitting to data acquisition device. These data are used to check equipment status in real time. In this paper I described in brief test process and results of the detection system.

• 한국항행학회논문지
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• 제24권4호
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• pp.285-290
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• 2020

본 논문에서는 텔레메트리 시스템에 적용하기 위한 PLL 기반의 시각동기 알고리즘을 제시하고 FPGA 로직을 구현하였다. 텔레메트리 시스템에서 대형 비행체의 경우 각각의 분산 획득 장치들을 통해 상태정보를 계측하여 실시간으로 비행 상태를 분석해야하므로 정밀도 향상을 위한 장치 및 시스템 간의 시각 동기의 중요성이 커지고 있다. 이 때문에 시각동기 기법으로 타 시각동기 방법보다 복잡도가 적고, 동기를 위한 추가적인 메시지 전송을 최소화하여 데이터 처리에 적은 시간이 소요되는 PLL 기반의 시각동기 알고리즘을 제안하였다. 타당성을 확인하기 위해 python 시뮬레이션을 수행하였으며 최종적으로 FPGA 내에 VHDL 로직을 구현하여 시각 동기 성능을 확인하였다.

• 대한기계학회논문집
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• 제18권9호
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• pp.2297-2311
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• 1994

This paper presents the study on the development of a DNC, system IPIS(Interactive Plant Information System)/DNC, which can manage NC machines and robots as a distributed control method in the machine. processing factory. The IPIS/DNC system is composed of a host computer, satellites and NC machines. A set of software modules are developed on the host computer and the satellites separately. By modularizing each functions of the IPIS/DNC system and using multi-taking method, the functions such as NC program management, NC program distribution, and shop monitoring can be performed on the host computer, and the functions such as NC program transfer to the NC machines, and NC program editing can be performed on the satellites. A Relational database which is linked with job scheduling system is used for IPIS/DNC system.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2004년도 춘계종합학술대회
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• pp.106-111
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• 2004

출어중인 어선들의 실시간 이동위치데이터를 자동으로 수집하기 위해서는 SSB 모뎀에 의한 데이터통신이 이루어져야 하며, GPS 시각에 동기 되어 정보를 교환하는 통신프로토콜을 연구하여야 한다. 또한 어선들의 운항데이터를 자동으로 수집하기 위해서는 해상정보의 권역화 및 집중화에 대한 연구가 선행되어야 하며, SSB에 의한 음성과 문자정보를 동시에 전송할 수 있는 변복조기와 송수신 제어기 그리고 CPS에 의한 위치정보의 취득에 대하여 연구하여야 한다.

• 수산해양기술연구
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• 제43권4호
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• pp.347-354
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• 2007

This paper describes on the real-time monitoring of net setting and hauling process for fishing operations of Danish seine vessels in the southern waters of Korea as an application of a PC based ECDIS system. Tracking of fishing process was performed for the large scale Danish seine vessel of G/T 90 and 350 PS class using the fishing gear which the length of net, ground rope, head rope and sweep line including warp in both sides were 86m, 104m, 118m and 3,200m, respectively. Tracking information for net setting and hauling process was continuously recorded for 23 fishing operations performed on November and December, 2003. All measurement data, such as trawl position, heading, towing course and past track which was individually time stamped during data acquisition, was processed in real time on the ECDIS and displayed simultaneously on the ENC chart. The results indicated that after the separation of a marker buoy from Danish seiner, the averaged running speed of vessel and the averaged setting period while shooting the seine on the course of diamond shape to surround the fish school in the 23 fishing operations were 8.3 knots and 13.1 minutes, respectively. And with the maker buoy taken on board, the averaged running speed of vessel and the averaged towing period while closing the seine on the straight route was 1.0 knots and 47.0 minutes, respectively. After the closing stage of hand rope, the hand rope was towed by the averaged speed of 2.2 knots during the 13.0 minutes. The average area for route of diamond shape swept by sweep lines of the seine in 23 fishing grounds was $709,951.6m^2$. Further investigation is also planed to provide more quantitative tracking information and to achieve more effective surveillance and control of Danish seine vessels in EEZ fishing grounds.

• 펄프종이기술
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• 제40권4호
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• pp.10-15
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• 2008

Flocculation phenomena of the stock mixed with cellulosic fibers, fillers and polymers were investigated by a new turbidity measurement system consisted of a probe-type turbidimeter, data acquisition system and computer. The probe-type turbidimeter allowed to measure the real time flocculation of the stock induced by single polymer and microparticle systems. Flocculation phenomena were evaluated by average and final relative turbidity indices. Turbidity and flocculation showed inverse relationship, i.e. the turbidity decreased with the formation of flocs. Relative turbidity of the stock treated with microparticle system was lower than that of the stock containing single polymer system, which indicated that the microparticle system showed greater floc forming efficiency than single polymer system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 D
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• pp.3184-3186
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• 2000

This paper describes the remote monitoring & diagnosis system of tower parking facilities. This system consists of central station, monitoring equipments and parking system control panel. The central station is developed under client/server architecture, and the monitoring systems are connected to central station by LAN using RAS constructed PSTN. This system offers real-time fault detection and data acquisition of tower parking system.