• Title/Summary/Keyword: Event Monitoring

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Monitoring of Machining State in Turning by Means of Information and Feed Motor Current (NC 정보와 이송축 모터 전류를 이용한 선삭 가공 상태 감시)

  • 안중환;김화영
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.16 no.1
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    • pp.156-161
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    • 1992
  • In this research a monitoring system for turning using NC information and the current of feed motor as a monitoring signal was developed. The overall system consists of modules such as learning process, NC data transmission, generation of forecast information, signal acquisition, monitoring and post process. In the learning process, the reference data and the cutting force equation necessary for monitoring are obtained from the accumulated monitoring results. In the generation of forecast information, the information of forecasted cutting forces is acquired from the cutting force equation and NC program and appended to each NC block as a monitor code. Reliability of monitoring is improved by using the monitor code in the real-time monitoring. Monitoring module is divided into two parts : the off-line monitoring where errors of NC program are checked and the on-line monitoring where the level of motor current is monitored during cutting operations. If the actual current level exceeds the limit value provided by the monitor code in the level monitoring, it is recognized as abnormal. In the event of abnormal status, the post processor sends the emergency stop signal to NC controller to stop the operation. Actual experiments have shown that the developed monitoring system works well.

Real-time system control for the 6-DOF simulation (6-DOF 시뮬레이터의 real-time 시스템 제어에 관한 연구)

  • 김영대;김충영;백인철;민성기
    • 제어로봇시스템학회:학술대회논문집
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    • 1989.10a
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    • pp.17-21
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    • 1989
  • 6-DOE simulator system is designed to real-time processing for motion control, data acquisition, image generation and image processing etc.. In this paper, we introduce hardware and software design technologies for distributed processing, event-trapping, system monitoring and time scheduling procedure in 6-DOF simulator system design.

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Android-based Implementation of Remote Monitoring System for Industrial Gas Turbines (안드로이드 기반 산업용 가스터빈 원격 모니터링 시스템 구현)

  • Choi, Joon-Hyuck;Lee, Dong-Ik
    • The Journal of the Korea institute of electronic communication sciences
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    • v.13 no.2
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    • pp.369-376
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    • 2018
  • This paper presents an android-based implementation of real-time remote monitoring system for industrial gas turbines. The use of remote monitoring techniques can be beneficial in terms of not only the reduction of monitoring cost but also the earlier detection of abnormal status. In order to achieve the ability of protecting sensitive information from unauthorized persons, the proposed system supports secure transmissions using the RSA(Rivest Shamir Adleman) algorithm. In the event of abnormal situation on the gas turbine, the remote monitoring system generates an alarm to attract the user's attention by exploiting a push-message technique. The proposed system has been verified through a series of experiments with an experimental setup including a virtual data generator.

M2M based personage information monitoring system (M2M기반 인물 정보 모니터링 시스템)

  • Lee, Jong-sung;Jeon, Min-ho;Oh, Chang-heon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2013.05a
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    • pp.1000-1003
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    • 2013
  • The monitoring system using a surveillance camera, has the advantage that can be observed in real time the blind spot of the crime, case to be mounted is increasing. However, surveillance camera, is used for the purpose of verification of the crime later than risk detection of crime before advance. Therefore, in this paper, in order to supplement the weak information collection monitoring system using the monitoring camera, by using the position information of the smartphone, infers the person monitoring region, the movement path of the image information other event occurs it is a fusion iT monitoring system that provides information of the user who judged. Result of the experiment, the proposed system confirmed the improved efficiency and usability than conventional systems.

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A Study on the Discharge Characteristics of Non-point Pollutant Source in the Agricultural Area of the Kyongan Watershed (경안천 유역 농촌지역의 비점오염원 배출 특성에 관한 연구)

  • Lee, Byung-Soo;Jung, Yong-jun;Park, Moo Jong;Gil, Kyung-Ik
    • Journal of Korean Society on Water Environment
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    • v.24 no.2
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    • pp.169-173
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    • 2008
  • A field monitoring was conducted in order to find out the discharge characteristics of non-point source pollutants in the agricultural area. Event Mean Concentration (EMC) of TSS, $BOD_5$, $COD_{Mn}$, TP, TN was calculated based on the monitoring data of 10 rainfall events at agricultural watersheds. A significant relationship was observed from the correlation between EMCs and rainfall characteristics. The result shows that EMC ranges of 95% confidence intervals were 50.5~203 mg/L for TSS, 0.8~14.2 mg/L for $BOD_5$, 4.2~20.7 mg/L for $COD_{Mn}$, 2.4~4.5 mg/L for TN and 0.2~0.5 mg/L for TP, respectively. The correlation coefficients between TSS and TP and between $BOD_5$ and $COD_{Mn}$ were found to be 0.912 and 0.961. But TN was lower correlated with other EMC factors. It was also found that rainfall characteristics was not correlated with EMCs.

A Study on behavior of Slope Failure Using Field Excavation Experiment (현장 굴착 실험을 통한 사면붕괴 거동 연구)

  • Park, Sung-Yong;Jung, Hee-Don;Kim, Young-Ju;Kim, Yong-Seong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.59 no.5
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    • pp.101-108
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    • 2017
  • Recently, the occurrence of landslides has been increasing over the years due to the extreme weather event. Developments of landslides monitoring technology that reduce damage caused by landslide are urgently needed. Therefore, in this study, a strain ratio sensor was developed to predict the ground behavior during the slope failure, and the change in surface ground displacement was observed as slope failed on the field model experiment. As a result, in the slope failure, the ground displacement process increases the risk of collapse as the inverse displacement approaches zero. It is closely related to the prediction of precursor. In all cases, increase in displacement and reverse speed of inverse displacement with time was observed during the slope failure, and it is very important event for monitoring collapse phenomenon of risky slopes. In the future, it can be used as disaster prevention technology to contribute in reduction of landslide damage and activation of measurement industry.

Analysis for Removal Efficiency of Non-point Pollution Sources by Constructed Wetlands (인공습지 형태에 따른 비점오염저감효율 분석)

  • Lee, Sang Hyuk;Kim, Lee Hyung;Cho, Hye Jin
    • Ecology and Resilient Infrastructure
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    • v.1 no.2
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    • pp.102-108
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    • 2014
  • Studies of non-point pollutant treatment facilities have widely been conducted for a decade, but natural non-point pollutant treatment facilities implemented on roads have not been carried out for the removal efficiency of non-point pollution sources. This study analyzed the removal efficiency of non-point pollution sources from constructed wetlands using monitoring and event mean concentration method. As a result of this study, removal efficiency of general non-point pollution sources as TSS, COD, BOD is relatively good, but removal efficiency of TN, TP, Cr, Zn, Pb is very small or nothing.

Genetic information analysis for the development of an event-specific PCR marker for herbicide tolerance LM crops

  • Do Yu, Kang;Myung Ho, Lim;Soo In, Sohn;Hyun Jung, Kang;Tae Sung, Park
    • Korean Journal of Agricultural Science
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    • v.48 no.4
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    • pp.1051-1065
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    • 2021
  • Recent times have seen sustained increases in genetically modified (GM) crops not only for cultivation but also for the utility of food and feed worldwide. Domestically, commercial planting and the accidental or unintentional release of living modified (LM) crops into the environment are not approved. Many detection methods had been devised in an effort to realize effective management of the safety of agricultural genetic resources. In order to develop event-specific polymerase chain reaction (PCR) markers for LM crops, we analyzed the genetic information of LM crops. Genetic components introduced into crops are of key importance to provide a basis for the development of detection methods for LM crops. To this end, a total of 18 varieties from four major LM crop species (maize, canola, cotton, and soybeans) were subjected to an analysis. The genetic components included introduced genes, promoters, terminators and selection markers. Thus, if proper monitoring techniques and single or multiplex PCR strategies that rely on selection markers can be established, such an accomplishment can be regarded as a feasible solution for the safe management of staple crop resources.

An Autonomous Command Recommend and Execution System for the Satellite Operation (위성 운영을 위한 이벤트 시퀀스 기반의 자동 명령 추천 및 수행 시스템)

  • Yang, Seung-Eun;Jung, Jae-Yeop;Cheon, Yee-Jin
    • Aerospace Engineering and Technology
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    • v.13 no.2
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    • pp.29-37
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    • 2014
  • Telemetry, satellite event and error information are used to check the satellite status in ground station. Different from telemetry which only informs the parameter value, event and error gives explicit information of a certain operation or status. Event also contains ground action information because every command execution is logged as event. Currently, those information is gathered and applied only for monitoring of the satellite. However, the load of the operation is getting grown because of the excessively increased information of the satellite with the number of satellite increasement. Also, the process of reporting problem to developer (or an expert) induce time delay for satellites fault management. In this paper, we propose a satellite operation assistant system which collects event sequence and stores in different group by its feature, and then recommends or executes an appropriate action for the identified abnormal state. This system is applicable to on board system for resolving LEO-satellite autonomous fault situation since is has limited contact time.