Systems and methods for multiple input instrumentation buses

• US 7,406,555 B2
• Filed: 04/29/2005
• Issued: 07/29/2008
• Est. Priority Date: 04/29/2005
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Juelfs, Rodney A, Roth, Andrew S.
• Primary Examiner(s): Myers; Paul R
• Application Number:
  US11/118,026
• Publication Number:
  US 20060248249A1
• Time in Patent Office: 1,187 Days
• Field of Search: 710/122, 710/124, 710/316, 709/240, 370/230
• US Class Current: 710/124
• CPC Class Codes: H04L 12/40032 Details regarding a bus interface enhancer
• CPC Class Codes: H04L 12/40176 involving redundancy error detection or correction of the data by redundancy in hardware using active fault-masking in interconnections G06F11/2002; error detection or correction of the data by redundancy in hardware using active fault-masking in storage systems using spares or by reconfiguring G06F11/2053
• CPC Class Codes: H04L 2012/40254 Actuator Sensor Interface ASI

Abstract

Systems and methods for multiple input instrumentation buses are disclosed. In one embodiment, a bus assembly includes a control module adapted to be coupled to a network, and a plurality of nodes operatively coupled in a linear topology. A plurality of interface modules are coupled to the nodes. At least one node is adapted to receive a primary response signal from the correspondingly coupled interface module, and a secondary response signal from at least one other node, and to determine which of the primary and secondary response signals arrived first, and to output a corresponding one of the primary and secondary response signals that arrived first.

Claims

1. A bus assembly, comprising:

a control module configured to be coupled to a network;

a plurality of nodes operatively coupled in a linear topology, a first one of the nodes being further coupled to the control module; and

a plurality of interface modules, each interface module being coupled to a corresponding one of the nodes, wherein at least one node is configured to receive a primary response signal from the correspondingly coupled interface module and a secondary response signal from at least one other node, and to determine which of the primary and secondary response signals arrived first, and to output a corresponding one of the primary and secondary response signals that arrived first, the plurality of interface modules being further configured to communicate in both isochronous and asynchronous modes of communication, wherein

the asynchronous mode being based on a discipline schema having a plurality of asynchronous time slots, wherein a corresponding one of the asynchronous time slots has a value corresponding to at least one of a try until acknowledged command, a send UUID command, and a retransmit last data packet command, and

the isochronous mode being based on a Time Division Multiple Access (TDMA) allocation of bandwidth, the TDMA allocation of bandwidth including subdividing the isochronous interval into the following four segments;

start time uncertainty segment;

data packet segment;

Inter Frame Gap (IFG) segment; and

an unused mode of the time slot segment.

2. The bus assembly of claim 1, wherein at least one node is further adapted to receive a control signal and to transmit the control signal to at least one other node and to the correspondingly coupled interface module.

3. The bus assembly of claim 1, wherein the at least one node is further adapted to discard the other of the primary and secondary response signals that did not arrive first.

4. The bus assembly of claim 1, wherein the control module includes a transducer bus controller and a controller node coupled to the transducer bus controller and to the first one of the nodes, and wherein the plurality of interface modules includes at least one transducer bus interface module.

5. The bus assembly of claim 1, wherein the interface modules are further configured to communicate in the isochronous mode followed by the asynchronous mode of communication using a data rate of at least 100 mb/s.

6. An instrumentation system, comprising:

a plurality of input sources;

a communication link configured to communicate using both isochronous and asynchronous modes of communication, wherein

the asynchronous mode being based on a discipline schema having a plurality of asynchronous time slots, wherein a corresponding one of the asynchronous time slots has a value corresponding to at least one of a try until acknowledged command, a send UUID command, and a retransmit last data packet command, and

the isochronous mode being based on a Time Division Multiple Access (TDMA) allocation of bandwidth, the TDMA allocation of bandwidth including subdividing the isochronous interval into the following four segments;

start time uncertainty segment;

data packet segment;

Inter Frame Gap (IFG) segment; and

an unused mode of the time slot segment; and

a bus assembly operatively coupled to the plurality of input sources and to the communication link, the bus assembly including;

a control module operatively coupled to the communication link;

a plurality of nodes operatively coupled in a linear topology, a first one of the nodes being further coupled to the control module; and

a plurality of interface modules, each interface module being coupled to a corresponding one of the nodes, wherein at least one node is configured to receive a primary response signal from the correspondingly coupled interface module and a secondary response signal from at least one other node, and to determine which of the primary and secondary response signals arrived first, and to output a corresponding one of the primary and secondary response signals that arrived first.

7. The system of claim 6, wherein the at least one node is further adapted to receive a control signal and to transmit the control signal to at least one other node and to the correspondingly coupled interface module.

8. The system of claim 6, wherein the asynchronous mode includes a discipline scheme to prevent collisions between responses of simultaneously responding interface modules.

9. The system of claim 6, wherein the asynchronous mode includes a discipline scheme having a plurality of asynchronous time slots.

10. A method of transmitting information along a multidrop bus, comprising:

providing a plurality of nodes operatively coupled in a linear topology;

providing a plurality of interface modules, each interface module being coupled to a corresponding one of the nodes, the plurality of interface modules being configured to communicate using both isochronous and asynchronous modes of communication, the asynchronous mode being based on a discipline schema having a plurality of asynchronous time slots, wherein a corresponding one of the asynchronous time slots has a value corresponding to at least one of a try until acknowledged command, a send UUID command, and a retransmit last data packet command;

receiving a primary response signal at a first one of the nodes from the correspondingly coupled interface module;

receiving a secondary response signal at the first one of the nodes from at least one other node;

determining which of the primary and secondary response signals arrived earlier; and

outputting the earlier-arriving one of the primary and secondary response signals, wherein communicating using an isochronous mode includes communicating using an isochronous mode based on a Time Division Multiple Access (TDMA) allocation of bandwidth, and wherein communicating using an isochronous mode based on a TDMA allocation of bandwidth includes subdividing the isochronous interval into the following four segments;

start time uncertainty segment;

data packet segment;

Inter Frame Gap (IFG) segment; and

an unused mode of the time slot segment.

11. The method of claim 10, further comprising receiving a control signal and transmitting the control signal to the at least one other node and to the correspondingly coupled interface module.

12. The method of claim 10, further comprising discarding the other of the primary and secondary response signals that did not arrive first.

13. The method of claim 10, wherein at least one of the receiving a primary response signal, and receiving a secondary response signal, and outputting the earlier-arriving one using a communication unit that includes an isochronous mode followed by an asynchronous mode.

14. The method of claim 10, wherein the unused portion of the time slot segment has a predefined time of 200 microseconds and is used to transmit the start asynchronous interval message.