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    Communication system and communication control method
    1.
    发明授权
    Communication system and communication control method 失效
    通信系统和通信控制方法

    公开(公告)号：US06556583B1

    公开(公告)日：2003-04-29

    申请号：US09255427

    申请日：1999-02-22

    申请人： Shunsuke Hayashi ,  Hideo Matsukawa ,  Toyoaki Yokoi

    发明人： Shunsuke Hayashi ,  Hideo Matsukawa ,  Toyoaki Yokoi

    IPC分类号： H04L1266

    CPC分类号： H04L12/403 ,  G06F11/1625 ,  H04L12/40182 ,  H04L12/4625

    摘要： A communication control system and method comprising, in one embodiment, a master station connected to a slave station using two redundant buses, wherein command frames having the same content are sent out to the buses and the communication process is changed depending on whether or not the contents of the command frames, when received by the a receiving station, are identical. In another embodiment, a plurality of units are connected to each bus in a multi-drop configuration, and a line length of each bus is defined so that reflected signals from other units reach a receiving unit on each bus after the transition period of a received signal at that receiving unit ends. In still another embodiment, a unit is connected to each bus and the unit is provided with a driver IC, wherein transmission data is first encoded into bit signals having a fixed number of bits, then the signals are supplied to the driver IC. In a further embodiment, a plurality of strobe signals are generated at different timings in a transmission circuit and a plurality of latch circuits equal to the number of strobe signals are provided in a receiver circuit so that data is retained in each latch circuit using the strobe signals one at a time. In a still further embodiment, an arbitration procedure is carried out using an arbitration bus when a bus master desires to use a data bus immediately after using the data bus, wherein it is determined whether arbitration has been carried out using the arbitration bus, and if none has been carried out, the arbitration procedure is omitted and the bus master is allowed to aquire the right to again use the data bus.

    摘要翻译： 一种通信控制系统和方法，在一个实施例中，包括使用两个冗余总线连接到从站的主站，其中具有相同内容的命令帧被发送到总线，并且通信过程根据是否改变 当接收站接收到命令帧的内容是相同的。 在另一个实施例中，多个单元以多点配置连接到每个总线，并且每个总线的线路长度被定义成使得来自其它单元的反射信号在接收到的过渡时段之后到达每个总线上的接收单元 信号在接收单元结束。 在另一个实施例中，单元连接到每个总线，并且该单元设置有驱动器IC，其中传输数据首先被编码为具有固定位数的位信号，然后将信号提供给驱动器IC。 在另一实施例中，在传输电路中以不同的定时产生多个选通信号，并且在接收机电路中提供等于选通信号数量的多个锁存电路，以便数据被保留在每个锁存电路中，使用频闪 一次发出一个信号。 在又一个实施例中，当总线主机在使用数据总线之后立即使用数据总线时，使用仲裁总线执行仲裁程序，其中确定是否已经使用仲裁总线进行仲裁，以及如果 没有一个被执行，仲裁程序被省略，总线主机被允许再次使用数据总线。

    Coriolis type mass flowmeter utilizing phase shifters for phase shifting of the output signals
    8.
    发明授权
    Coriolis type mass flowmeter utilizing phase shifters for phase shifting of the output signals 失效
    科里奥利型质量流量计利用移相器对输出信号进行相移

    公开(公告)号：US5578764A

    公开(公告)日：1996-11-26

    申请号：US498310

    申请日：1995-07-05

    申请人： Toyoaki Yokoi ,  Hiroshi Owada

    发明人： Toyoaki Yokoi ,  Hiroshi Owada

    IPC分类号： G01F1/84

    CPC分类号： G01F1/8431 ,  G01F1/8436 ,  G01F1/849

    摘要： A Coriolis type mass flowmeter utilizing a measuring tube through which flows the fluid being examined and a pair of Coriolis signals generated thereby, wherein are provided a first and second A/D converter to convert the respective pair of Coriolis signals into respective digital signals; a first and second phase shifter for converting the respective digital signals to output signals each deviated from the respective digital signals by 90.degree.; a timing clock generator for supplying the first and second A/D converter with timing signals which are independent of vibrations of the Coriolis signals, and trigonometric calculating device for obtaining tan .PHI. using the following equation: tan .PHI.=(bc-ad)/(ac+bd), wherein a and c represent the outputs from the A/D converters, and b and d represent the outputs from the phase shifters, and tan .PHI. represents the tangent signal of the phase difference between the pair of Coriolis signals, whereby the speed of calculation is considerably increased and error of calculation is substantially eliminated.

    摘要翻译： 科里奥利型质量流量计利用测量管流动被检测的流体和由此产生的一对科里奥利信号，其中设置有第一和第二A / D转换器，以将各对科里奥利信号转换为相应的数字信号; 第一和第二移相器，用于将各个数字信号转换成各自数字信号偏离90°的输出信号; 用于向第一和第二A / D转换器提供与科里奥利信号的振动无关的定时信号的定时时钟发生器，以及使用以下等式获得tan PHI的三角计算装置：tan PHI =（bc-ad）/（ ac + bd），其中a和c表示来自A / D转换器的输出，b和d表示来自移相器的输出，tan PHI表示科里奥利信号对之间的相位差的切线信号，由此 计算速度大大增加，计算误差基本上消除。