• Title/Summary/Keyword: Performance Monitoring

Search Result 3,515, Processing Time 0.029 seconds

An Intelligent bridge with an advanced monitoring system and smart control techniques

  • Miyamoto, Ayaho;Motoshita, Minoru
    • Smart Structures and Systems
    • /
    • v.19 no.6
    • /
    • pp.587-599
    • /
    • 2017
  • This paper introduces an approach to the realization of an ICT-based bridge remote monitoring system that enables real-time monitoring and controlled adjustments for unexpected heavy loads and also for damaging earthquakes or typhoons. In this paper, an integrated bridge remote monitoring system called the "Intelligent Bridge", which consists of a stand-alone monitoring system (SMS) and a web-based Internet monitoring system(IMS), was developed for not only bridge maintenance but also as an application for a para-stressing bridge system. To verify the possibility of controlling the actual structural performance of an "Intelligent Bridge", a model 2-span continuous cable-stayed bridge with adjustable cables was constructed. The experimental results demonstrate that the implemented monitoring system supplies detailed and accurate information about bridge behaviour for further evaluation and diagnosis, and it also opens up prospects for future application of a web-based remote system to actually adjust in-service bridges under field conditions.

Cloud monitoring system for assembled beam bridge based on index of dynamic strain correlation coefficient

  • Zhao, Yiming;Dan, Danhui;Yan, Xingfei;Zhang, Kailong
    • Smart Structures and Systems
    • /
    • v.26 no.1
    • /
    • pp.11-21
    • /
    • 2020
  • The hinge joint is the key to the overall cooperative working performance of the assembled beam bridge, and it is also the weakest part during the service period. This paper proposes a method for monitoring and evaluating the lateral cooperative working performance of fabricated beam bridges based on dynamic strain correlation coefficient indicator. This method is suitable for monitoring and evaluation of hinge joints status between prefabricated girders and overall cooperative working performance of bridge, without interruption of traffic and easy implementation. The remote cloud monitoring and diagnosis system was designed and implemented on a real assembled beam bridge. The algorithms of data preprocessing, online indicator extraction and status diagnosis were given, and the corresponding software platform and scientific computing environment for cloud operation were developed. Through the analysis of real bridge monitoring data, the effectiveness and accuracy of the method are proved and it can be used in the health monitoring system of such bridges.

Evaluation of Remote Handling Performance with the Polarized Stereo Monitoring System (편광방식 스테레오 모니터링 시스템의 원격조작성 평가)

  • Lee, Yong-Bum;Lee, Nam-Ho;Park, Soon-Yong;Lee, Jong-Min;Jin, Sung-Il
    • Journal of Sensor Science and Technology
    • /
    • v.5 no.5
    • /
    • pp.55-62
    • /
    • 1996
  • This paper describes development of Polarized Stereo Monitoring System (KAERI-PSM) and compares the remote handling performance of KAERI-PSM with that of other monitoring systems, electric shutter type stereo monitoring system and general TV monitoring system. Remote handling performance is evaluated by total time and error number on remote operating experiments. Four kinds of remote handling experiments are carried out through 1) directly 2) general TV 3) electric shutter type monitor, and 4) KAERI-PSM. In these experiments six employees are participated and PUMA robot with force-torque reflectional joystic is used. The result of experiments show that camera angle against object is significant factor in monitoring and stereo monitoring system give more performance benifits in terms of accuracy and speed of remote handling operation than general TV monitoring system. In comparision of the polarized and electric shutter type stereo monitoring system, both have similar accuracy and speed for remote handling operation, but the former is superior in image quality and stability of the performance.

  • PDF

Case Study on Technology and Regulation Improvement of Subway Maintenance Monitoring (지하철 유지관리 계측의 기술 및 제도 개선방안 연구)

  • 우종태;김홍석
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • 2000.03b
    • /
    • pp.303-308
    • /
    • 2000
  • By means of analyzing of monitoring technology and monitoring regulation based on maintenance monitoring system installed in subway tunnel section, it needs monitoring system, development of operating program, monitoring analyzing system and development of analysis method, establishment of maintenance monitoring standard specification, and performance of responsible monitoring supervision for applying to subway monitoring maintenance effectively in future. It requires specialized monitoring and legislation of monitoring subcontract, improvement of monitoring work contract method, establishment the standard payment of monitoring, and effective calibration and correction of monitoring system in the plan of improving monitoring regulation.

  • PDF

Development of Tire Lateral Force Monitoring Systems Using Nonlinear Observers (비선형 관측기를 이용한 차량의 타이어 횡력 감지시스템 개발)

  • 김준영;허건수
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.8 no.4
    • /
    • pp.169-176
    • /
    • 2000
  • Longitudinal and lateral forces acting on tires are known to be closely related to the tract-ability braking characteristics handling stability and maneuverability of ground vehicles. In thie paper in order to develop tire force monitoring systems a monitoring model is proposed utilizing not only the vehicle dynamics but also the roll motion. Based on the monitoring model three monitoring systems are developed to estimate the tire force acting on each tire. Two monitoring systems are designed utilizing the conventional estimation techniques such as SMO(Sliding Mode Observer) and EKF(Extended Kalman Filter). An additional monitoring system is designed based on a new SKFMEC(Scaled Kalman Filter with Model Error Compensator) technique which is developed to improve the performance of EKF method. Tire force estimation performance of the three monitoring systems is compared in the Matlab simulations where true tire force data is generated from a 14 DOF vehicle model with the combined-slip Magic Formula tire model. The built in our Lab. simulation results show that the SKFMEC method gives the best performance when the driving and road conditions are perturbed.

  • PDF

A Study on the Performance and Utilization of Results of Self-monitoring of Blood Glucose in Type Ⅱ Diabetes (일 병원 제2형 당뇨병환자의 자가혈당검사 수행 및 활용 실태)

  • Ha, Jung-Mi;Kim, Dong-Hee
    • The Journal of Korean Academic Society of Nursing Education
    • /
    • v.16 no.2
    • /
    • pp.330-338
    • /
    • 2010
  • Purpose: This study was conducted to investigate performance of self-monitoring of blood glucose and the utilization of results for people with type II diabetes. Method: Data was collected from 177 patients with type II diabetes using a questionnaire from August to September, 2009. Result: Most participants performed self-monitoring of blood glucose in the correct way while some misused the lancet or test strips. In the utilization of results for self-monitoring blood glucose data, 62% of participants always recorded the data, 46% always understood the cause for hyperglycemia or hypoglycemia, 25% changed their diet, 23% regulated their exercise-amount, and 11% of participants adjusted the drug dosage. There were significant differences in the performance of self-monitoring of blood glucose and the utilization of results according to the characteristics in the self-monitoring subjects such as awareness of HbA1c, target fasting glucose level, target fasting glucose level 2 hours after meal etc. Conclusion: Systemic self-monitoring of blood glucose education which includes the utilization of self-monitoring of blood glucose needs to be developed for type II diabetic patients.

Development of Practical Integral Condition Monitoring System for A Small Turbojet Engine Using SIMULINK and LabVIEW (SIMULINK와 LabVIEW를 이용한 소형 터보제트 엔진의 실용 통합 상태 진단 시스템 개발)

  • Kong, Changduk;Kho, Seonghee;Park, Gilsu;Park, Gwanglim
    • Journal of the Korean Society of Propulsion Engineers
    • /
    • v.17 no.1
    • /
    • pp.80-88
    • /
    • 2013
  • In currently developed engine condition monitoring systems, most field engine maintenance engineers have difficulties to use them in fields due to complexity, unpractical use, lack of understanding, etc. Therefore a practical usable engine condition monitoring system must be needed. This work proposes a practical performance condition monitoring of a small turbojet engine through comparing between the on-line performance monitoring data and the initial clean performance data calculated by the base engine performance model. Moreover the proposed monitoring system checks the gas path components' on-line health condition through comparing the component performance characteristics between the running engine represented as a deteriorated engine or a degraded engine and the base engine performance model represented as a clean engine. The proposed condition monitoring system is coded in a friendly GUI type program for easy practical application by a commercial tool, MATLAB/SIMULINK and LabVIEW.

Performance Monitoring and Load Analysis of Wind Turbine (풍력발전기의 성능 모니터링 및 하중분석)

  • Bae, Jae-Sung;Kim, Sung-One;Youn, Joung-Eun;Kyung, Nam-Ho
    • 유체기계공업학회:학술대회논문집
    • /
    • 2004.12a
    • /
    • pp.385-389
    • /
    • 2004
  • Test facilities for the wind turbine performance monitoring and mechanical load measurements are installed in Vestas 100 kW wind turbine in Wollyong test site, Jeju island. The monitoring system consists of Garrad-Hassan T-MON system, telemetry system for blade load measurement, various sensors such as anemometer, wind vane, strain gauge, power meter, and etc. The experimental procedure for the measurement of wind turbine loads, such as edgewise(lead-lag) bending moment, flapwise bending moment, and tower base bending moment, has been established. Strain gauges are on-site calibrated against load cell prior to monitoring the wind turbine loads. Using the established monitoring system, the wind turbine is remotely monitored. From the measured load data, the load analysis has been performed to obtain the load power spectral density and the fatigue load spectra of the wind turbine.

  • PDF

A Network Performance Analysis System based on Network Monitoring for Analyzing Abnormal Traffic (비정상 트래픽 분석을 위한 네트워크 모니터링 기반의 네트워크 성능 분석 시스템)

  • Kim, So-Hung;Koo, Ja-Hwan;Kim, Sung Hae;Choi, Jang-Won;An, Sung-Jin
    • Convergence Security Journal
    • /
    • v.4 no.3
    • /
    • pp.1-8
    • /
    • 2004
  • Large distributed systems such as computational and data grids require that a substantial amount of monitoring data be collected for various tasks such as fault detection, performance analysis, performance tuning, performance prediction, security analysis and scheduling. to cope with this problem, they are needed network monitoring architecture which can collect various network characteristic and analyze network security state. In this paper, we suggest network performance and security analysis system based on network monitoring. The System suggest that users can see distance network state with tuning network parameters.

  • PDF

Photovoltaic System Energy Performance Analysis Using Meteorological Monitoring Data (기상 환경 모니터링 데이터를 이용한 태양광발전시스템 발전량 성능 분석)

  • Kwon, Oh-Hyun;Lee, Kyung-Soo
    • Journal of the Korean Solar Energy Society
    • /
    • v.38 no.4
    • /
    • pp.11-31
    • /
    • 2018
  • Nowadays, domestic photovoltaic system market has been expanded and the governmental dissemination policy has been continued. There is only PV system output performance analysis which is called Performance Ratio(PR) analysis. However, there exists many parameters that can affect PV system output. This papers shows the PV system energy performance analysis using meteorological monitoring data. The meteorological monitoring system was installed in the H university and we analyzed the PV system which installed in the H university. We also investigated other three PV systems which located less than 3 kilometers from H university. We evaluated total 4 PV systems through the field survey data, design drawing data and power generation data. Finally, we compared the actual measuring data with the simulation data using PVSYST software.