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文中就一种传送带式产品的实时检测系统,介绍了它的系统结构和图象板的工作原理,文中还介绍了它的应用及实验结果。 相似文献
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本文介绍一种专门用来测量转动式交流接触器触头超程的器具,它能直接读数、测量效率和测量精度较高、使用方便、通用性强。文中介绍了它的结构和使用方法后,着重分析了它的特点和试验验证结果。 相似文献
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本文介绍了平面绘图机智能接口装置的研制工作,并介绍了它的软、硬件设计思想和控制部件以及它的指标和参数。该装置现已成为产品,交付用户使用,从而开拓了平面绘图机的应用领域。 相似文献
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紧凑型成套开关设备国内外发展水平 总被引:1,自引:0,他引:1
笔者介绍了紧凑型成套开关设备的组成形态,论述了紧凑型成套开关设备的技术特点,通过对国内外紧凑型成套开关设备技术特点及参数的分析,重点论述了紧凑型成套开关设备的发展水平。总结了各个公司紧凑型成套开关设备的主要技术特点,在此基础上阐述了紧凑型成套开关设备的发展趋势。 相似文献
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Kaminaga K. Koshiishi M. Hayashi T. Matsuki M. Hara T. Sugiyama N. 《Power Delivery, IEEE Transactions on》1987,2(4):961-968
This paper describes the results of studies made on dust control during field jointing and a method for detecting conductive particles after installation in the development of a compact 500 kV 8000 A gas insulated transmission line (GIL). The study on dust control during field jointing proved that field jointing of the compact GIL can be done like conventional GIL in an easily fabricated vinyl shelter without a clean air flow. Harmful conductive particles can be detected with an Acoustic Emission (AE) sensor. This sensor is effective in improving the reliability of the compact GIL when used with a suitable ac voltage during field test. A 120 m long test line of compact 500 kV 8000 A GIL was constructed and, in a long-term field test, proved to have properties sufficient for practical use. 相似文献
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单相箱式变电站的应用为居民区供电的节能与环境和谐提供了好的思路。对单相柱上变压器与单相箱式变电站在居民区供电的应用进行了比较,介绍了单相箱式变电站的结构和主要特点,提供了对其供电的3种方式。用案例说明在居民区应用单相箱式变电站供电的优势,并展望了良好的应用前景。 相似文献
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The compact disc player is a synergy of optics, communication theory, digital signal processing, and control engineering. This familiar consumer product may be employed as a cost-effective laboratory instrument to teach the fundamentals of optical storage, error detection and correction, and optical communication. The compact disc audio system, from analog input, through optical storage and distribution, to audio reproduction, provides an excellent model of a complete real-world optical transmission and storage system. A series of experiments, which illustrate some of the more significant operational principles of the compact disc player, are presented in this contribution. Optical read-out and the physics of information density are explored through a set of experiments in optical storage. Error detection and correction are studied experimentally by evaluating the performance of the compact disc player's error control system. The design of an optical fiber communication system is studied by extracting the channel bit stream from a compact disc player, transmitting it over an optical fiber link, and then reinserting it back into the compact disc player for audio reproduction 相似文献
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750kV单回紧凑型线路带电作业方式试验研究 总被引:4,自引:3,他引:1
紧凑型输电技术是我国近十几年迅速发展和应用的一项新技术,紧凑型输电线路与常规线路相比,具有提高自然输送功率、压缩线路走廊宽度、降低工程建设造价的特点,具有很大的经济效益和社会效益。为确保750kV紧凑型输电线路带电作业的安全进行,进行了安全防护研究,根据线路实际情况对进入紧凑型输电线路带电作业方式和通道进行了仿真试验研究。研究结果表明,上相水平通道和下相水平通道为安全优化的带电作业通道,带电作业人员在工作位置时,50%放电电压没有明显的降低,工作位置安全。 相似文献
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紧凑型线路原理及应用 总被引:2,自引:0,他引:2
本文从交流输电基本原理出发,详细阐述了采用不同于常规的措施提高超高压输电线路输送容量及走廊利用率的紧凑型线路技术。结合华北电网运行的安-廊220kV紧凑型试验线路运行经验,进一步分析了我国今后拟采用的导线对称优化倒三角排列紧凑型线路及其拟在我省的应用前景。 相似文献
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