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    • 3. 发明授权
    • Fault tolerant optical communication apparatus and method
    • 容错光通信设备及方法
    • US06307652B1
    • 2001-10-23
    • US09069060
    • 1998-04-28
    • Mohammed Fassih-NiaErnest A. CisnerosMilton E. CramDonald Ray Taylor
    • Mohammed Fassih-NiaErnest A. CisnerosMilton E. CramDonald Ray Taylor
    • H04B1020
    • H04B10/27H04B10/275
    • An optical communication system (11) includes a plurality of nodes (16,17,18,19), each node connected in a first optical communication path (22) and a second optical communication path (23) extending parallel to the first optical communication path. The first optical communication path (22) is joined to each node by a first receiver (30) and first transmitter (31), while the second optical communication path (23) is joined to each node by a second receiver (32) and second transmitter (33). One of the nodes comprises a control unit node (19) having a control unit (37) associated therewith. The other nodes of the communication system comprise data unit nodes, each having a data unit (36) associated therewith. The communication system (11) normally operates with the control unit (37) in an open mode of operation in which data is not transferred across the node. Thus, in normal operation, the communication system (11) operates in an open ring configuration. When a fault occurs on the optical communication path (22,23) between adjacent data units, the system detects the fault and switches the control unit (37) to a closed mode of operation in which data is transferred along both optical communication paths (22,23) across the control unit node (19).
    • 光通信系统(11)包括多个节点(16,17,18,19),每个节点连接在第一光通信路径(22)中,第二光通信路径(23)平行于第一光通信 路径。 第一光通信路径(22)由第一接收机(30)和第一发射机(31)连接到每个节点,而第二光通信路径(23)由第二接收机(32)连接到每个节点,第二光通信路径 发射机(33)。 一个节点包括具有与其相关联的控制单元(37)的控制单元节点(19)。 通信系统的其他节点包括数据单元节点,每个节点具有与其相关联的数据单元(36)。 通信系统(11)通常以控制单元(37)操作,其中数据不跨越节点传送的开放操作模式。 因此,在正常操作中,通信系统(11)以开环配置工作。 当在相邻数据单元之间的光通信路径(22,23)发生故障时,系统检测到故障,并将控制单元(37)切换到封闭的操作模式,其中数据沿着两条光通信路径(22 ,23)跨越控制单元节点(19)。
    • 7. 发明授权
    • Universal safety system for automatic doors
    • 自动门通用安全系统
    • US5465033A
    • 1995-11-07
    • US250552
    • 1994-05-27
    • Mohammed Fassih-Nia
    • Mohammed Fassih-Nia
    • E05F15/00G05B5/00
    • E05F15/43E05F2015/434E05Y2900/106
    • A safety system comprises a light beam transmitter and receiver and means connected through a standard AC power plug to the main power supply of an automatic garage door opener for controlling the power thereto. The transmitter transmits a beam of light across the opening of a garage door. The receiver is positioned to receive the light beam if there is nothing obstructing the beam. The receiver generates a signal indicating when the beam is being received. The means disconnects the power to the garage door opener when a signal is generated indicating that the light beam is not being received. The garage door is thus prevented from making contact with and hurting or damaging a person or object in its path.
    • 安全系统包括光束发射器和接收器,以及通过标准AC电源插头连接到自动车库门开启器的主电源的装置,用于控制电力。 发射器将光束穿过车库门的开口。 如果没有任何物体阻挡梁,接收器被定位成接收光束。 接收器产生指示何时接收波束的信号。 当产生指示没有接收到光束的信号时,该装置断开车库门开启器的电源。 因此,车库门被阻止与其路径中的人或物体接触并损坏或损坏。