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    • 2. 发明授权
    • Multiplex communication system for sequence controllers
    • 序列控制器的多路复用通信系统
    • US4881220A
    • 1989-11-14
    • US235498
    • 1988-08-24
    • Toshihiko YomogidaTsuyoshi YamashitaShigeo YamamotoHideaki TobitaHisanori NakamuraGoro Kobayashi
    • Toshihiko YomogidaTsuyoshi YamashitaShigeo YamamotoHideaki TobitaHisanori NakamuraGoro Kobayashi
    • H04J3/14H04L12/437
    • H04J3/14H04L12/437
    • Among systems configured by connecting a plurality of sequence controllers to one communication line to intercommunicate, many systems has been disclosed which implement fault location and recovery from the faults. In one of these systems, each substation is connected to a circulating communication line via a branch line and switches are respectively disposed on the branch line and on the communication line at both sides of a connecting point of the branch line and the communication line. Further, the communication line can be formed in a loop by a spare line. In another of these systems, an integrated portion of the communication line is formed near the master station, and the communication line is connected to the master station and is configured of one continuous line which goes and backs in sequence between the integrated portion and vicinity of each substation. In that integrated portion, a switch is disposed on each one of two lines, which connect the integrated portion and each substation. Further, a switch is provided on a line which bypasses these two switches. Other systems are a composite of the above systems. Still other systems have automated portions of fault location and fault recovery.
    • 在通过将多个序列控制器连接到一个通信线路以进行互通来配置的系统中,已经公开了实现故障定位和从故障恢复的许多系统。 在这些系统之一中,每个变电站通过分支线路连接到循环通信线路,并且开关分别设置在分支线路和分支线路和通信线路的连接点两侧的通信线路上。 此外,可以通过备用线路将通信线路形成为环路。 在这些系统的另一个中,在主站附近形成通信线路的集成部分,并且通信线路连接到主站,并且由一条连续的线路构成,该连续线路在一体化部分和 每个变电站。 在该集成部分中,开关设置在连接整合部分和每个变电站的两条线路中的每一条线上。 此外,在绕过这两个开关的线路上提供开关。 其他系统是上述系统的组合。 其他系统还具有故障定位和故障恢复的自动化部分。
    • 7. 发明授权
    • Transmission line branching device
    • 传输线分支装置
    • US4985886A
    • 1991-01-15
    • US420378
    • 1989-10-12
    • Toshihiko YomogidaAkira UchidaGoro KobayashiHisanori Nakamura
    • Toshihiko YomogidaAkira UchidaGoro KobayashiHisanori Nakamura
    • H04L12/437
    • H04L12/437
    • A branching device to send out data received at an arbitrary one of three terminals thereof through the other two terminals. In the device, the terminals are coupled to each other by means of photo-couplers. The head of a data block received by each receiver connected with each terminal is detected, and after such detection of the head, a signal which specifies the length of the data block is generated. Thus, after communication data are received by way of an arbitrary one of the terminals, reception of communication data by way of the other two terminals is inhibited while transmission of the communication data is enabled in response to the signal specifying the data block detected.Since the transmission lines of the three directions are electrically isolated from each other by the photo-couplers, even when a failure of short-circuiting occurs at a main transmission line or a branch line or the like, communications are continued bypassing the location of the failure similarly as in the case of a failure of breaking of a wire.
    • 分支装置,通过其他两个终端发送在其三个终端中任意一个接收的数据。 在该装置中,端子通过光耦合器彼此耦合。 检测由每个终端连接的每个接收器接收的数据块的头部,并且在这种头部的检测之后,生成指定数据块的长度的信号。 因此,在通过任意一个终端接收通信数据之后,响应于指定检测到的数据块的信号,禁止在通信数据的发送被使能的同时通过其他两个终端的通信数据的接收。 由于三个方向的传输线通过光电耦合器彼此电隔离,所以即使在主传输线或分支线路等发生短路故障时,也会继续通信, 类似于在断线的情况下的故障。
    • 10. 发明授权
    • Optical transmission device
    • 光传输装置
    • US4996683A
    • 1991-02-26
    • US420373
    • 1989-10-12
    • Tsuyoshi YamashitaGoro KobayashiHisanori NakamuraYouichi ShibataToshihiro Mori
    • Tsuyoshi YamashitaGoro KobayashiHisanori NakamuraYouichi ShibataToshihiro Mori
    • H04B10/25
    • H04B10/2503
    • An optical transmission device for interconnecting an optical full duplex transmission line and a half duplex transmission line. When a start bit of a data block of an electrical signal received from the half duplex transmission line is detected, a maintaining signal to maintain the same transmission direction is generated during which the data block can be transmitted. An optical signal is received from the optical full duplex transmission line and converted into an electrical signal. Similarly, a maintaining signal to maintain the same transmission direction is generated. In response to either one of the two maintaining signals, passage or stopping of signals by a driver for sending out an electrical signal to the half duplex transmission line and a receiver for receiving an electrical signal from the half duplex-transmission line are controlled. Possible interference of data is prevented and the transmission direction is changed over in this manner. Further, the level of an optical signal is monitored, and when the optical signal level becomes lower than a reference level, an abnormality warning data is transmitted succeeding to the data block.
    • 一种用于互连光学全双工传输线和半双工传输线的光传输设备。 当检测到从半双工传输线接收到的电信号的数据块的起始位时,产生保持相同​​传输方向的维持信号,在该维持信号期间可以发送数据块。 从光学全双工传输线接收光信号并转换成电信号。 类似地,产生维持相同传输方向的维持信号。 响应于两个保持信号中的任一个,控制由驱动器发送电信号到半双工传输线路的信号的通过或停止以及用于从半双工传输线路接收电信号的接收机。 可以防止数据的干扰,并以这种方式改变传输方向。 此外,监视光信号的电平,并且当光信号电平变得低于参考电平时,在数据块之后发送异常警告数据。