• Title/Summary/Keyword: cell monitoring

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Cell Voltage Monitoring of PEMFC Power Module for Fuel Cell Electric Vehicle (연료전지 차량용 PEMFC 발전모듈의 셀전압 측정)

  • Park Hyunseok;Jeon Ywunseok;Ku Bonwoong;Choi Seoho
    • 한국신재생에너지학회:학술대회논문집
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    • 2005.06a
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    • pp.388-391
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    • 2005
  • In this paper, Cell voltage monitoring method is studied for fault detection of PEMFC(Proton Exchange Membrane Fuel Cell) for FCEV(fuel cell electric vehicle). To measuring several hundred of cells in fuel cell stack, The demanded feature of hardware and software is studied and several types are analysed. Finally, $3.26\%$ maximum measuring error is acquired and verified experimentally.

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Bio-inspired Cell Deformability Monitoring Chips Based on Strain Dependent Digital Lysis Rates (미소유로의 길이에 따른 통과세포의 파괴율을 바탕으로 한 생체모사 세포 변형성 검사칩에 관한 연구)

  • Youn, Se-Chan;Lee, Dong-Woo;Cho, Young-Ho
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.32 no.10
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    • pp.844-849
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    • 2008
  • We present a novel cell deformability monitoring chip based on the digitally measured cell lysis rate which is dependent on the areal strain of the cell membrane. This method offers simple cell deformability monitoring by automated high-throughput testing system. We suggest the filter design considering the areal strain imposed on the cell membrane passing through the filter array having gradually increased orifice length. In the experiment using erythrocytes, we characterized the cell deformability in terms of average fracture areal strain which was $0.24{\pm}0.014\;and\;0.21{\pm}0.002$ for normal and chemically treated erythrocytes, respectively. We also verified that the areal strain of 0.15 effectively discriminates the deformability difference of normal and chemically treated erythrocytes, which can be applied to the clinical situation. We compared the lysis rates and their difference for the samples from different donors and found that the present chips can be commonly used without any calibration process. The experimental results demonstrate the simple structure and high performance of the present cell deformability monitoring chips, applicable to simple and cost-effective cell aging process monitoring.

Development of Cell Voltage Monitoring Module for PEMFC (연료전지 스택의 셀 전압 감시를 위한 장치 개발)

  • Jung, Jae-Wook;Kim, Tae-Hoo;Park, Hyun-Seok;Jeon, Ywun-Seok;Ku, Bon-Woong
    • 한국신재생에너지학회:학술대회논문집
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    • 2006.11a
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    • pp.376-379
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    • 2006
  • In this paper, stack voltage monitoring module is developed which monitor cell voltage of the fuel cell stack and transfer it to the main controller for monitoring fault and stopping drive when the trouble is happened in the fuel cell stack. Especially, the circuit, for monitoring each cell voltage of several hundreds cells in stack, is designed and analyzed. The connector is also developed for making wire harness simple and low cost because wire harness is complicated when the cells are connect each monitoring circuit.

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Application of Computer-coupled Mass Spectrometer for Continuous On-line Monitoring of Cell Growth and Growth Rate (세포증식과 증식속도의 On-line Monitoring을 위한 Computer- coupled Mass Spectrometer의 응용)

  • 남수완;최춘순;김정회
    • Microbiology and Biotechnology Letters
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    • v.17 no.3
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    • pp.241-246
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    • 1989
  • Continuous on-line monitoring of cell concentration and growth rate in aerobic batch fermentation process was carried out by analyzing the exhaust gas composition of tormentor with a quadrupole mass spectrometer. From the mass spectrometric analyses of major gaseous components, i.e. $N_2$, $O_2$, $CO_2$ and $H_2O$, and the material balance equations for oxygen and carbon dioxide, oxygen uptake rate (OUR) rind carbon dioxide evolution rate (CER) were instantaneously calculated using a computer (16-bit IBM PC-AT) interfaced to a quadrupole mass spectrometer. The calculated OUR and CER data were used for the estimation of cell concentration and growth rate of Candida utilis during batch culture. It was found that the cell concentration could be satisfactorily estimated from the data of OUR arid CER during the culture and this method could be successfully und for the continuous monitoring of cell growth and growth rate.

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A Study on the Hierarchical Real-time Operation Control and Monitoring for an Flexible Manufacturing System (유연생산시스템의 계층구조적 실시간 운용제어 및 모니터링에 관한 연구)

  • Kim, Jong-Won
    • Journal of the Korean Society for Precision Engineering
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    • v.9 no.4
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    • pp.36-43
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    • 1992
  • This paper presents a hierarchical real-time operation control and monitoring scheme of the FMS/CIM center which has been implemented at the Automation and Systems Research Institute of Seoul National University. The hierarchical structure of the whole scheme consists of three lavers. The upper layer is in charge of on-line scheduling, computer network control, shop-floor monitoring and command generation for AGV dispatching, machining, assembly, inspection, set-up, etc. The middle layer has six modules, which are installed in the FMS host computer with the upper layer and run on the multi-tasking basis. Each module is connected to one of six cell controllers distributed in the FMS model plant and transfers operation command down to each cell controller through the Ethernet/TCP-IP local area network. The lower layer is comprised of six cell control software modules for machining cell, assembly cell, inspection cell, set-up stations. AS/RS and AGV. Each cell controller reports the status of the manufacturing facilites to the middle layer as well as ecxecuting the appropriate sequence control of the manufacturing processes.

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Intelligent Monitoring Network System (지능형 모니터링 네트웍 시스템 구성에 관한 연구)

  • 김영구;조현찬;김두용;전홍태
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 2000.11a
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    • pp.393-398
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    • 2000
  • In this paper, we propose an Intelligent Monitoring Network System(IMNS) for the truck scale balance system. Truck scale balance system consis of three parts; Load cell part, Indicator part, and Junction box part. IMNS is attached to Junction box in truck scale balance system. Even if Load cell have been some problems, a truck scale balance system still has been run to determine, the values involved error. Therefore prosed system is has concentrated on Load cell part. Other Parts have been changed a portion of circuit for monitoring system.

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The Intelligent Monitoring System for a heavy weight scale (고 중량 측정 장치를 위한 지능형 모니터링 시스템)

  • 김영구;조현찬;정병우;김두용
    • Proceedings of the IEEK Conference
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    • 2000.11c
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    • pp.41-44
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    • 2000
  • In this paper, we propose an Intelligent Monitoring Network System(IMNS) for The truck scale balance system. Truck scale balance system consis of three parts; Load cell part, Indicator part, and Junction box part. IMNS is attached to Junction box in truck scale balance system. Even if Load cell have been some problems, a truck scale balance system still has been run to determine, the values involved error. therefore prosed system is has concentrated on Load cell part. Other Parts have been changed a portion of circuit for monitoring system.

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Fuel Cell Stack Cell Monitoring Method (연료전지 셀 전압 모니터링 방법에 관한 연구)

  • Kim, Dong-Rak;Kim, Hyun;Ichinose, Toshihiko
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.1031_1032
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    • 2009
  • The voltages of unit cells of a fuel cell stack are one of the most significant factors to detect failure conditions and thereof safely control and operate the fuel cell system. In this paper, we describe two methods to monitor the voltages of the unit cells of a stack in consideration of data accuracy, circuit extensibility to various numbers of cells, and cost. The reported methods are approached by (i) the power isolation of cell voltage monitoring part from the communications part and (ii) the utilization of a commercially available cell monitoring integrated circuit IC of a Li-ion battery.

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Development of Intelligent Landscape Lighting Power Control and Monitoring System with Solar Cell Generator Equipment (태양광발전설비와 연계한 지능형 경관조명 전력제어 및 모니터링 시스템의 개발)

  • Kim, Dong-Wan;Park, Sung-Won;Kim, Hyung-Su
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.60 no.2
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    • pp.99-104
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    • 2011
  • In this paper, the intelligent landscape lighting power control and monitoring system with solar sell generator equipment is proposed. The first, the intelligent landscape lighting power controller is designed using the fuzzy logic control method. And the fuzzy logic controller is used to save power consumption for various reference intensity of the illumination. The second, the GUI monitoring system is presented. It has control and display faculty. And the practical experiment device is used to evaluate the performance criteria of the proposed intelligent landscape lighting power control system with the solar cell power generation equipment. From the experiment results, we present the property of proposed fuzzy controller such as steady state error, the tracking and power consumption characteristic for the reference intensity of illumination. And also we show the superiority of power control as well as the characteristic of GUI monitoring system in the proposed system.