Mike Krzyzewski is really a famous coach of Dream Team. She has coached north america men's basketball team for some time, that's clinched numerous medals for his country. Following Londonfl jerseys supplyn Olympic was over, Krzyzewski told The Associated Press that this game will be his final one as national coach, a job he's held for seven years. He had left open the possibility of swomen nfl jerseystaying with the team beyond the London Games, when practice on Saturday said these will be his last Olympics.When asked if he was sure, Krzyzewski didn't hesitate before again saying, "yecheap nfl jerseys wholesales," this will be his last game "If we could win it, then it might be three major championships in a row, i always do not know when that has been done because we haven't usually won http://govoriotkrito.bg/libs/nflcn08.htmthe globe championships," Krzyzewski said. "It becomes an enormous thing for the program." Whatever, he's an awesome coach. His achievement are going to be remembered by the country.cheap nfl jerseys
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我们需要了解的真空断路器的技术问题

2013/11/21 12:36:44      点击:
  作为输配电设备核心部件之一的真空断路器,如何满足智能电网信息化、数字化、自动化、互动化的要求,已经成为各研究机构和制造厂商共同关注的人点问题,接下来给大家简单介绍下真空断路器的技术问题:

      从用户需求的角度来看,智能化真空断路器除具有真空断路器通用功能外,还应具有感知功能、思维判断功能和执行功能。即不仅要具有灵敏、准确的获取大量周围信息的功能,对获取的信息进行分析、处理、发出执行操作指令并监控的功能,还能具备对分析、处理的结果实施有效的反馈和必要的操作的功能。

     针对分析的需求,智能化真空断路器面临突破

     一、实现思维判断功能,这是智能化的核心,该功能的实现必须依靠现代电子技术、计算机技术和通信技术。智能控制器的输入既有来源自感知功能获取的信息,又有来自执行功能犯规的信息,还有来自系统的控制信息;智能控制器综合这些信息后,可自动识别断路器的工作状态、自动调整断路器的操作信息、自动计量关键信息、自动对断路器的元器件和操作进行诊断等智能思维判断;智能控制器的输出一方面为执行功能提供操作指令,另一方面为系统提供断路器工作状态信息;此外还需具有高可靠、长寿命、强抗电磁干扰的功能。

     二、实现感知功能。这是基础,该功能实现必须依托现代传感器技术来获取如电压、电流、绝缘、距离、速度、温度等信息,传感器讲这些信息转换成被能识别和处理的各种信号,将电信号转换成机械能,能够准确、可靠、灵敏的反应出来,除此之外还应具有使用断路器的工作环境、体积小、便于安装的特点。

    三、实现执行功能。执行功能必须按控制器发出的操作指令进行可靠的操作,完成断路器的关合与开断;同事执行功能必须具有可靠、长寿命、体积小的功能,目前永磁操动机构基本能满足智能化断路器对执行功能的要求。

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