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    • 1. 发明授权
    • Sensor actuator bus system
    • 传感器执行器总线系统
    • US5469150A
    • 1995-11-21
    • US364061
    • 1994-12-27
    • Hans J. Sitte
    • Hans J. Sitte
    • B60R16/02B60R16/03G05B19/05G05B19/418H04L12/413H04Q9/14G08C19/16G05B23/02H04J3/14
    • H04L12/40163G05B19/054G05B19/4185H04L12/4135H04Q9/14B60R16/0315G05B2219/31136G05B2219/31154G05B2219/31191G05B2219/33196H04L12/40045H04L2012/40215Y02P90/18
    • A four-wire bus is provided with a two-wire power bus and a two-wire signal bus and a plurality of sensors and actuators attached to both two-wire busses. A modification is provided to the standard CAN protocol developed and provided by Robert Bosch GmbH, in which the standard CAN header, of a data packet is modified to incorporate a shortened device identifier priority. By shortening the identifier field of the CAN header three bits are made available for use as a short form protocol data unit which can be used to contain binary information representing both the change of status of an identified device and the current status of the device. The same three-bit PDU can be used to acknowledge receipt of the change of status information. In order to retain all of the beneficial capabilities of the standard CAN protocol, the three-bit short form PDU can also be used to identify the use of additional bytes of a data field so that a device can take advantage of the more complex capabilities of the standard CAN protocol. However, in situations where a mere change of status report is sufficient, the present invention reduces the length of a message from a minimum of three bytes to a length of two bytes to obtain the significant benefits of increased speed of message transmission.
    • 四线总线上设有两线电源总线和两线信号总线以及连接在两线总线上的多个传感器和执行器。 对由Robert Bosch GmbH开发和提供的标准CAN协议进行了修改,其中数据包的标准CAN头被修改为包含缩短的设备标识符优先级。 通过缩短CAN标题的标识符字段,可以使用三位可用作短格式协议数据单元,其可以用于包含表示所识别的设备的状态的改变和设备的当前状态两者的二进制信息。 可以使用相同的三位PDU来确认接收状态信息的更改。 为了保留标准CAN协议的所有有益功能,三比特短格式PDU也可用于识别数据字段的附加字节的使用,以便器件可以利用更复杂的功能 标准CAN协议。 然而,在仅仅改变状态报告就足够的情况下,本发明将消息的长度从最小的三个字节减小到两个字节的长度,以获得提高消息传输速度的显着优点。
    • 2. 发明申请
    • Communication apparatus for real-time embedded control
    • 用于实时嵌入式控制的通信设备
    • US20060268855A1
    • 2006-11-30
    • US11139652
    • 2005-05-31
    • Wayne BrandtTravis BreitkreutzMike Lyons
    • Wayne BrandtTravis BreitkreutzMike Lyons
    • H04L12/56
    • G05B19/042G05B2219/25032G05B2219/25211G05B2219/25221G05B2219/2616G05B2219/31191
    • A communication apparatus is provided, which may include a node having a processor and a computer-readable medium, the node being associated with an electrical component of a real-time embedded control system configured to control one or more electronic components. The communication apparatus may further include a program stored on the computer readable medium that, when executed by the processor, is operable to identify data to be communicated, and divide the data into one or more frames. Each frame may include a frame header and a frame data payload portion. The frame data payload portion may include one or more segments, forming a sequence of segments, each segment including a segment header including segment data indicating a location of the segment in the sequence. The segment may also include a segment data payload portion.
    • 提供一种通信装置,其可以包括具有处理器和计算机可读介质的节点,该节点与被配置为控制一个或多个电子部件的实时嵌入式控制系统的电气部件相关联。 通信装置还可以包括存储在计算机可读介质上的程序,当由处理器执行时,该程序可操作以识别要传送的数据,并将数据划分成一个或多个帧。 每个帧可以包括帧头部和帧数据有效载荷部分。 帧数据有效载荷部分可以包括形成片段序列的一个或多个片段,每个片段包括片段标题,片段标题包括指示片段在序列中的位置的片段数据。 该段还可以包括段数据有效载荷部分。