Methods and systems for automated real time continuous waveform electrical property monitoring and status reporting

• US 9,691,191 B1
• Filed: 02/18/2011
• Issued: 06/27/2017
• Est. Priority Date: 02/18/2011
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Righi, Luigi P., Hansen, Brian A., Wellbrook, Gregory M.
• Primary Examiner(s): Toatley, Gregory J
• Assistant Examiner(s): Ishizuka, Yoshihisa
• Application Number:
  US13/030,975
• Time in Patent Office: 2,321 Days
• Field of Search: 702 66, 702 79, 455431, 455 98, 455345
• CPC Class Codes: B64F 1/00 Ground or aircraft-carrier-deck installations
• CPC Class Codes: G05B 19/0428 Safety, monitoring G05B19/0423 takes precedence
• CPC Class Codes: G05B 23/00 Testing or monitoring of control systems or parts thereof monitoring of programme-control systems G05B19/048, G05B19/406
• CPC Class Codes: G05B 23/0235 based on a comparison with predetermined threshold or range, e.g. "classical methods", carried out during normal operation; threshold adaptation or choice; when or how to compare with the threshold
• CPC Class Codes: G07C 5/008 communicating information to a remotely located station transmission systems for measured values G08C
• CPC Class Codes: G07C 5/0841 Registering performance data recording measured values G01D; information storage G11B

Abstract

A method for performing an integrated waveform analysis without the use of an external device is disclosed. The method includes receiving, at a processing device, at least one electrical waveform associated with a communications bus, extracting, with the processing device a plurality of real time parametric measurements of voltage samples for the at least one electrical waveform, comparing, with the processing device, the parametric measurements of voltage samples to stored data that is accessible to the processing device, the stored data related to expected electrical signal characteristics for the communications bus proximate at least one of system interfaces, hardware components, and interconnections associated with the communications bus, distinguishing any system interconnection degradations and hardware failures associated with the communications bus based on said comparing, and reporting, via the processing device, at least one of: extracted electrical signal parametric measurements are consistent with the stored electrical signal characteristics, electrical signal parameters are indicative of a system interconnection degradation, and electrical signal parameters are indicative of a hardware failure.

Claims

1. A method for performing an integrated waveform analysis without the use of an external device, said method comprising:

receiving, by a quality waveform analysis module including a processing device, at least one electrical waveform associated with an electrical signal communicated from a first line replaceable unit (LRU) to a second LRU across a communications bus;

extracting, by the quality waveform analysis module, a plurality of real time parametric measurements of waveform voltage samples relative to time of the at least one electrical waveform, wherein the real time parametric measurements are associated with a signal quality of the electrical signal and comprise one or more of the following waveform signal characteristics;

frequency, peak voltage, rise times, and fall times;

comparing, by the quality waveform analysis module, the extracted real time parametric measurements to expected waveform parametric measurements for the communications bus proximate at least one of system interfaces, hardware components, and interconnections associated with the communications bus;

processing, by the quality waveform analysis module, differences between the extracted real time parametric measurements and the expected waveform parametric measurements to determine whether a failure mode exists on the communications bus;

when the failure mode is determined to exist, identifying, by the quality waveform analysis module, whether a system interconnection degradation or a hardware failure caused the failure mode based on the processed differences between the real time and expected waveform parametric measurements; and

displaying, via the quality waveform analysis module, a signal quality status indicator based on at least one of said processing and said identifying, wherein the signal quality status indicator represents the signal quality for the electrical signal and includes one or more of the following indications;

the extracted parametric measurements of waveform voltage samples are consistent with the expected waveform parametric measurements and no failure mode has been detected,

the failure mode exists and the parametric measurements of the waveform voltage samples are indicative of a system interconnection degradation between at least one of the first and second LRUs and the communications bus being the cause of the failure mode, and

the failure mode exists and the parametric measurements of waveform voltage samples are indicative of a hardware failure of at least one of the first and second LRUs being the cause of the failure mode.

2. The method according to claim 1 wherein extracted real time parametric measurements further comprises one or more of the following:

jitter, pulse width, slew rate, settling time, relative phase, and noise.

3. The method according to claim 1 wherein receiving, at a processing device, at least one electrical waveform comprises receiving messages transmitted between line replaceable units on an aircraft.

4. The method according to claim 1 wherein receiving, at a processing device, at least one electrical waveform comprises receiving at least one of Aeronautical Radio Incorporated 429 (ARINC-429), Military Standard Aircraft Internal Time Division Command/Response Multiplex Data Bus 1553 (MIL-STD-1553), Electronic Industries Alliance 232 (EIA-232), EIA-422, Recommended Standard 485 (RS-485), Ethernet (802.3), digital visual interface (DVI), and High-Definition Multimedia Interface (HDMI) messages at the processing device.

5. The method according to claim 1 wherein receiving, at a processing device, at least one electrical waveform comprises communicatively coupling a unit including the processing device to one or more communications buses.

6. The method according to claim 1 wherein comparing the extracted real time parametric measurements to stored data that is accessible to the processing device comprises characterizing if waveform quality output by a remote terminal is appropriate to a functional specification for a bus associated with the remote terminal.

7. The method according to claim 1 wherein receiving, at a processing device, at least one electrical waveform comprises at least one of receiving the waveform at a module embedded within a line replaceable unit and communicatively coupled to a communications bus and receiving the waveform at a standalone module communicatively coupled to a communications bus.

8. The method according to claim 1 wherein reporting, via the processing device, comprises identifying electrical signal related events as they occur.

9. A unit for analyzing electrical signal conditions associated with a communications bus, said unit comprising:

a communications interface for communicatively coupling said unit to the communications bus;

a storage device for storing data related to expected waveform parametric measurements the communications bus proximate at least one of system interfaces, hardware components, and interconnections associated with the communications bus, wherein parametric measurements comprise one or more of the following waveform signal characteristics;

frequency, peak voltage, rise times, and fall times; and

a quality waveform analysis module including a processing device programmed to;

receive, via said communications interface, electrical waveforms associated with an electrical signal communicated from a first line replaceable unit (LRU) to a second LRU across the communications bus;

extract real time parametric measurements of waveform voltage samples relative to time of the received electrical waveform;

compare the extracted real time parametric measurements to the stored data within said storage device;

process differences between the extracted real time parametric measurements and at least the expected waveform parametric measurements for the communications bus in the stored data to determine whether a failure mode exists, if any, associated with the communications bus;

when the failure mode is determined to exist, identify whether a system interconnection degradation or a hardware failure caused the failure mode based on the processed differences between the real time and expected waveform parametric measurements; and

display a signal quality status indicator based on at least one of the processed differences and the identified cause of the failure mode, wherein the signal quality status indicator represents the signal quality for the electrical signal and includes one or more of the following indications;

the extracted parametric measurements of waveform voltage samples are consistent with the expected waveform parametric measurements and no failure mode has been detected,

the failure mode exists and the parametric measurements of the waveform voltage samples are indicative of a system interconnection degradation between at least one of the first and second LRUs and the communications bus being the cause of the failure mode, and

the failure mode exists and the parametric measurements of waveform voltage samples are indicative of a hardware failure of at least one of the first and second LRUs being the cause of the failure mode.

10. The unit according to claim 9 further comprising an output device operable to communicate the results of the comparison by said processing device.

11. The unit according to claim 9 wherein the parametric measurements further comprise one or more of the following:

jitter, pulse width, slew rate, settling time, relative phase, and noise; and

wherein said processing device is further programmed to compare at least one of frequency, peak voltage, jitter, pulse width, slew rate, settling time, relative phase, noise, rise time, and fall time measurements from the extracted real time parametric measurements with the expected waveform parametric measurements stored within said storage device.

12. The unit according to claim 9 wherein said communications interface is compatible with at least one of Aeronautical Radio Incorporated 429 (ARINC-429), Military Standard Aircraft Internal Time Division Command/Response Multiplex Data Bus 1553 (MIL-STD-1553), Electronic Industries Alliance 232 (EIA-232), EIA-422, Recommended Standard 485 (RS-485, Ethernet (802.3), digital visual interface (DVI), and High-Definition Multimedia Interface (HDMI).

13. The unit according to claim 9 wherein said unit is programmed to receive, via said communications interface, electrical waveforms associated with messages on a communication bus transmitted between line replaceable units on an aircraft.

14. The unit according to claim 9, said unit comprising at least one of a module embedded within a line replaceable unit of an aircraft and communicatively coupled to the communications bus and a standalone module communicatively coupled to the communications bus.

15. The unit according to claim 9 wherein said unit is programmed to determine if waveform quality of an electrical waveform output by a remote terminal onto a communications bus is appropriate to a functional specification for the communications bus associated with the remote terminal.

16. The unit according to claim 9 further comprising an interface to an external device, said unit programmed to identify electrical signal related events as they occur via said interface to the external device.

17. A method, comprising:

receiving, by a quality waveform analysis module including a processing device, electrical signals associated with communications between at least two systems across a communications bus;

comparing, by the quality waveform analysis module, electrical waveform parametric measurements of waveform voltage samples relative to time of the received electrical signals with expected electrical waveform parametric measurements of waveform voltage samples relative to time stored in a memory associated with the processing device to determine signal qualities for each of the electrical signals, wherein parametric measurements comprise one or more of the following waveform signal characteristics;

frequency, peak voltage, rise times, and fall times;

processing, by the quality waveform analysis module, a difference between the parametric measurements of the received electrical signals and the expected electrical waveform parametric measurements stored in the memory and a functional specification for the communications bus to determine whether a failure mode exists on the communications bus;

when the failure mode is determined to exist, identifying, by the quality waveform analysis module, whether a system interconnection degradation or a hardware failure caused the failure mode based on the processed differences between the parametric measurements and the expected waveform parametric measurements; and

displaying, on an external device, a plurality of signal quality status indicators based on at least one of the processing and the identifying, wherein the plurality of signal quality status indicators represent the signal qualities for the plurality of electrical signals and include one or more of the following indications;

the extracted parametric measurements of waveform voltage samples are consistent with the expected waveform parametric measurements and no failure mode has been detected,

the failure mode exists and the parametric measurements of the waveform voltage samples are indicative of a system interconnection degradation between at least one of the systems and the communications bus being the cause of the failure mode, and

the failure mode exists and the parametric measurements of waveform voltage samples are indicative of a hardware failure of at least one of the systems being the cause of the failure mode.

18. The method according to claim 17 wherein the parametric measurements further comprise one or more of the following:

jitter, pulse width, slew rate, settling time, relative phase, and noise; and

wherein comparing comprises comparing at least one of the expected electrical waveform parametric measurements with at least one of the parametric measurements of the received electrical signals.