公开(公告)号：US4857921A

公开(公告)日：1989-08-15

申请号：US868997

申请日：1986-05-30

申请人： William B. McBride ,  William R. Wilson, Jr. ,  John C. Tomlinson ,  John A. McCarthy ,  Eugene W. Kochanowsky ,  Jefferson D. Hendricks ,  Arthur J. Houle

发明人： William B. McBride ,  William R. Wilson, Jr. ,  John C. Tomlinson ,  John A. McCarthy ,  Eugene W. Kochanowsky ,  Jefferson D. Hendricks ,  Arthur J. Houle

IPC分类号： G08G1/07

CPC分类号： G08G1/07

摘要： A digital control system for controlling the flow of traffic in selected directions in response to digital signals transmitted from a common transmitting control unit to multiple separate receiving traffic control units respectively associated with each controlled direction. The transmitting unit includes a transmitter and digital command code generator operative when actuated to transmit a character in the form of a digital signal specific for one of the receiving units. Each receiving unit includes traffic control indicators operative in different modes of display indications visible to traffic flowing in the direction to be controlled by that unit. Each receiving unit further includes a receiver operative to deliver demodulated characters based on codes transmitted by the transmitting unit, and the codes controlling a microprocessor programmed to process the received characters to initiate command outputs, and logic circuitry connected to receive said outputs and responsive thereto to display traffic control indications as determined by the local unit's demodulated characters, each unit keeping a model of what is being displayed by other units in the system and using it to prevent conflicting traffic control indications.

摘要翻译： 一种数字控制系统，用于响应于从公共发送控制单元发送到分别与每个受控方向相关联的多个分离的接收业务控制单元的数字信号来控制所选方向上的业务流量。 发射单元包括发射机和数字命令码发生器，当被致动以传送特定于其中一个接收单元的数字信号的形式的字符时可操作。 每个接收单元包括在不同的显示指示模式下操作的交通控制指示器，其可以在由该单元控制的方向上流动。 每个接收单元还包括接收机，用于根据发送单元发送的代码传送解调字符，以及控制被编程为处理接收到的字符以启动命令输出的微处理器的代码以及连接以接收所述输出的逻辑电路， 显示由本地单元的解调字符确定的业务控制指示，每个单元保持系统中其他单元正在显示的模型并使用它来防止冲突的业务控制指示。