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    • 1. 发明授权
    • Self-healing passive optical network
    • 自愈无源光网络
    • US07359637B2
    • 2008-04-15
    • US10901274
    • 2004-07-28
    • Hyun-Soo KimIn-Kwon KangSung-Bum ParkJae-Hoon Lee
    • Hyun-Soo KimIn-Kwon KangSung-Bum ParkJae-Hoon Lee
    • H04J14/00
    • H04J14/0295H04J14/0226H04J14/0227H04J14/0246H04J14/025H04J14/0282H04J14/0293
    • A self-healing passive optical network is disclosed. The network includes a central office and a remote node connected to the central office through a main optical fiber. The remote node transmits one portion of power of the upstream optical signal, which has been input from each of the optical network units, to the central office, and returning a remaining portion of the power of the upstream optical signal to the optical network unit. The network also includes a plurality of optical network units connected to the remote node through a plurality of distribution optical fibers. Each of the optical network units transmits an upstream optical signal to the remote node through the directly connected distribution optical fiber, and detects abnormality occurrences from a state of the upstream optical signal returning from the remote node.
    • 公开了一种自愈无源光网络。 该网络包括通过主光纤连接到中心局的中心局和远程节点。 远程节点将已经从每个光网络单元输入的上游光信号的一部分功率发送到中心局,并将上游光信号的剩余部分的功率返回到光网络单元。 网络还包括通过多个分配光纤连接到远程节点的多个光网络单元。 每个光网络单元通过直接连接的分配光纤将上行光信号发送到远程节点,并且从从远程节点返回的上行光信号的状态来检测异常发生。
    • 5. 发明授权
    • Wideband optical module and PON using the same
    • 宽带光模块和PON使用相同
    • US07280719B2
    • 2007-10-09
    • US11143238
    • 2005-06-02
    • Jae-Hoon LeeSung-Bum ParkYun-Je OhSeong-Taek HwangHyun-Soo Kim
    • Jae-Hoon LeeSung-Bum ParkYun-Je OhSeong-Taek HwangHyun-Soo Kim
    • G02B6/28
    • H04J14/02H04B10/296H04B10/2972
    • A wideband optical module includes a downward wideband light source for generating downward light, an upward wideband light source for generating upward light, a first circulator including a first to a third port for outputting multiplexed downward optical signals to the second port and for outputting multiplexed upward optical signals to the first port, a second circulator including a first to a third port for outputting multiplexed upward optical signals to the second port and for outputting multiplexed downward optical signals to the first port, a first optical coupler connected to the third port of the first circulator and the second port of the second circulator for outputting the downward light to the third port of the first circulator, and a second optical coupler connected to the second port of the first circulator and the third port of the second circulator for outputting the upward light to the third port of the second circulator.
    • 宽带光模块包括用于产生向下的光的向下宽带光源,用于产生向上光的向上宽带光源,包括第一至第三端口的第一循环器,用于将多路复用的下行光信号输出到第二端口并用于输出多路复用 光信号到第一端口,第二循环器,包括第一至第三端口,用于将多路复用的上行光信号输出到第二端口,并将多路复用的下行光信号输出到第一端口;第一光耦合器,连接到第一端口的第三端口 第一循环器和第二循环器的第二端口,用于将向下的光输出到第一循环器的第三端口;以及第二光耦合器,连接到第一循环器的第二端口和第二循环器的第三端口,用于输出向上 光到第二个循环器的第三个端口。
    • 6. 发明申请
    • Wideband optical module and PON using the same
    • 宽带光模块和PON使用相同
    • US20060029393A1
    • 2006-02-09
    • US11143238
    • 2005-06-02
    • Jae-Hoon LeeSung-Bum ParkYun-Je OhSeong-Taek HwangHyun-Soo Kim
    • Jae-Hoon LeeSung-Bum ParkYun-Je OhSeong-Taek HwangHyun-Soo Kim
    • H04J14/00
    • H04J14/02H04B10/296H04B10/2972
    • A wideband optical module includes a downward wideband light source for generating downward light, an upward wideband light source for generating upward light, a first circulator including a first to a third port for outputting multiplexed downward optical signals to the second port and for outputting multiplexed upward optical signals to the first port, a second circulator including a first to a third port for outputting multiplexed upward optical signals to the second port and for outputting multiplexed downward optical signals to the first port, a first optical coupler connected to the third port of the first circulator and the second port of the second circulator for outputting the downward light to the third port of the first circulator, and a second optical coupler connected to the second port of the first circulator and the third port of the second circulator for outputting the upward light to the third port of the second circulator.
    • 宽带光模块包括用于产生向下的光的向下宽带光源,用于产生向上光的向上宽带光源,包括第一至第三端口的第一循环器,用于将多路复用的下行光信号输出到第二端口并用于输出多路复用 光信号到第一端口,第二循环器,包括第一至第三端口,用于将多路复用的上行光信号输出到第二端口,并将多路复用的下行光信号输出到第一端口;第一光耦合器,连接到第一端口的第三端口 第一循环器和第二循环器的第二端口,用于将向下的光输出到第一循环器的第三端口;以及第二光耦合器,连接到第一循环器的第二端口和第二循环器的第三端口,用于输出向上 光到第二个循环器的第三个端口。
    • 10. 发明申请
    • HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINE
    • 建筑机械液压系统
    • US20150159682A1
    • 2015-06-11
    • US14416201
    • 2012-07-27
    • Sang-Ki BaeJae-Hoon Lee
    • Sang-Ki BaeJae-Hoon Lee
    • F15B20/00F15B15/20
    • F15B20/007E02F9/2235E02F9/2285E02F9/2296F15B11/0423F15B15/202F15B2211/20546F15B2211/40507F15B2211/41563F15B2211/50518F15B2211/5157F15B2211/6306F15B2211/6309F15B2211/6652
    • A hydraulic system provided with a relief valve for a construction machine is disclosed, which can reduce a discharge flow rate of a hydraulic pump when a relief valve is operated. The hydraulic system for a construction machine includes a variable displacement hydraulic pump connected to an engine, an attachment operation device outputting an operation signal in proportion to an operation amount by an operator, an attachment actuator connected to the hydraulic pump to be driven by an operation of the attachment operation device, a control valve installed in a flow path between the hydraulic pump and the attachment actuator and shifted to control a start, a stop, and a direction change of the attachment actuator, an orifice installed in a flow path branched from a discharge flow path of the hydraulic pump, a relief valve installed on a downstream side of the orifice in the flow path, and a controller outputting a control signal to a flow control valve of the hydraulic pump so as to reduce a discharge flow rate of the hydraulic pump when a difference between pressures before and after the orifice exceeds a predetermined value.
    • 公开了一种设置有用于建筑机械的安全阀的液压系统,其可以在减压阀操作时降低液压泵的排出流量。 用于建筑机械的液压系统包括连接到发动机的可变排量液压泵,与操作者的操作量成比例地输出操作信号的附接操作装置,连接到液压泵以由操作驱动的附接致动器 安装在液压泵和安装致动器之间的流动路径中的控制阀,并且移动以控制附接致动器的起动,停止和方向改变;安装在流路中的孔, 液压泵的排出流路,安装在流路中的孔口的下游侧的安全阀,以及向液压泵的流量控制阀输出控制信号的控制器,以减少液压泵的排出流量 当孔之前和之后的压力之间的差异超过预定值时,液压泵。