マリンエンジニアリング
Online ISSN : 1884-3778
Print ISSN : 1346-1427
ISSN-L : 1346-1427
39 巻 , 11 号
選択された号の論文の8件中1~8を表示しています
  • 田守 芳勝
    2004 年 39 巻 11 号 p. 735-743
    発行日: 2004/11/01
    公開日: 2010/05/31
    ジャーナル フリー
    1970年代後半から現れた新技術「メカトロニクス」に関しては学問的に体系付けられて著述された文献も少なくメカトロニクス技術教育を専門に行っている大学も余り聞かない.僅かにコンピュータ専門学校などにコースが設けられているに過ぎない.
    今全ての産業分野でメカトロニクスが取り入れられており, マリンエンジニアリングの世界においても遅れ馳せながら船上でマイクロコンピュータが活躍する時代が訪れた.筆者が真空管, トランジスタ, 超LSIを使い機械の自動化を進めてきた40年を振返り, メカトロニクスに取り組もうとする若い技術者の些かの助けになればと思い, 思いつく侭にメカトロニクス技術を取りまとめた.
  • 林 直司, 小林 真二郎
    2004 年 39 巻 11 号 p. 744-751
    発行日: 2004/11/01
    公開日: 2010/05/31
    ジャーナル フリー
    The GCP Series generator set control provide total control of engines, generators and power systems for medium to large applications with multiple generator sets. The GCP's compact design encompasses multiple functions for direct control of engine governor/actuators and generator AVR; it also directly protects the engine-generator itself, generator power bus, load bus and system. The GCP is applied to distributed/on-site power generation unit to economize on system power consumption and simple power supply preparation for emergency or stand-by use, as well as to meet cogeneration requirements or as an additional power supply supplementing existing generator sets.
  • 鴛海 幸一郎
    2004 年 39 巻 11 号 p. 752-758
    発行日: 2004/11/01
    公開日: 2010/05/31
    ジャーナル フリー
    Accompanying industry developments, the role of sensors has significantly expanded. Traditional sensors were primarily used for equipment inspection, doing nothing more than monitoring whether the equipment itself was functioning normally. However, for today's sensors, as feedback inputs, an element of motion control has become indispensable. Equipment sensory input devices have been developed having sensors that greatly affect the characteristics and performance of the entire system, using digital control technology provided by the rapid development of microcomputers. Such sensors would require resistance to vibration, impact, temperature extremes, dust, and oil, among other things, and must exhibit adequate reproducibility and precision even in harsh environments. Moreover, they need to be maintenance-free. The INDUCTCODER is composed of original LSI conversion units and ultra-small detecting elements that have excellent environmental resistance and high precision. The INDUCTCODER has an applications record in a wide variety of fields, from industrial machines to consumer goods
  • 宮田 繁
    2004 年 39 巻 11 号 p. 759-764
    発行日: 2004/11/01
    公開日: 2010/05/31
    ジャーナル フリー
    This paper describes the operating principles, characteristics, reliability, applications, and features of sensors used in emission control for gasoline engines, such as exhaust gas oxygen sensors, universal exhaust gas oxygen sensors, and NOx sensors. Additionally it describes technical trends in emission control systems for diesel engines and such sensors as temperature sensors, NH3 sensors, and soot sensors.
  • 和泉 充
    2004 年 39 巻 11 号 p. 765-770
    発行日: 2004/11/01
    公開日: 2010/05/31
    ジャーナル フリー
  • 高木 直之
    2004 年 39 巻 11 号 p. 771-780
    発行日: 2004/11/01
    公開日: 2010/05/31
    ジャーナル フリー
  • 上田 浩一, 山之内 博
    2004 年 39 巻 11 号 p. 781-786
    発行日: 2004/11/01
    公開日: 2010/05/31
    ジャーナル フリー
    During recovery of spilled oil, floating oil is contained with a barrier and the oil layer is thickened and removed. When the contained oil is recovered, the aim is to increase the recovery rate and to reduce the water content in the recovered oil-and-water mixture. When the recovered water is discharged after separation through the oily water separator on board, oil content has to be at or below 15 ppm. To make it easy to separate oil from water, the oil should be recovered with low water content. Oil recovery with no water content is ideal, but when the oil layer becomes thin, recovered oil contains a large amount of water.
    In this study, oil was suctioned from above the surface of the oil layer to reduce water content in the recovered oil-and-water mixture. Even if air was sucked in with the oil, the air could be easily separated. When the suction inlet was located near the interface between the oil layer and the water, the water content increased; the influence of the clearance between the suction inlet and the oil layer surface and the influence of the oil viscosity were investigated experimentally.
    In the low-viscosity case, at a clearance of 4 mm and using a vacuum cleaner, the oil was recovered well with low water content. In the case of high-viscosity oil, at a clearance of 3-4 mm and using a high-vacuum pump, oils could be recovered well with low water content.
  • 張 涛, 塚本 達郎, 大江 賢二, 岡田 博
    2004 年 39 巻 11 号 p. 787-794
    発行日: 2004/11/01
    公開日: 2010/05/31
    ジャーナル フリー
    Large two-stroke marine diesel engines have high thermal efficiency and use inexpensive marine diesel fuel (MDF) . Such engines can contribute to control of global warming by low CO2emission. However, polluting matter, NOx, , SOx, and PM are discharged in large quantities, and countermeasures are required for environmental protection. It was reported that fuel-water emulsion was effective to reduce emissions and to improve combustion. Micro-explosion phenomena and the behavior of water particles in the droplet of emulsified fuel are not clear enough for understanding the effects on combustion, however. This paper introduces an experimental study on combustion of a single droplet of water-in-fuel emulsion of MDF at high temperature and in a high-pressure chamber.
    The experimental results show that, in an atmospheric experiment, when the mean diameter of the water particles increases, the micro-explosion becomes violent and the burning time and ignition delay become shorter; on the other hand, in a high-pressure experiment, when the initial pressure of the chamber increases, the projected flame area becomes smaller and the micro-explosion becomes weaker.
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