Wire system assessment

• US 8,423,305 B2
• Filed: 12/23/2009
• Issued: 04/16/2013
• Est. Priority Date: 12/23/2009
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Thomas, Terrance L., Call, Camron Ravell, Rosman LaFever, Monica C., Chaplin, Carey
• Primary Examiner(s): Barbee, Manuel L
• Application Number:
  US12/645,805
• Publication Number:
  US 20110153235A1
• Time in Patent Office: 1,210 Days
• Field of Search: 702/58, 702/59, 702/79, 702/117, 702/118, 702/124, 324/512, 324/534, 324/503, 324/525, 324/527, 324/528, 324/533, 324/555
• US Class Current: 702/59
• CPC Class Codes: G01R 31/008 on air- or spacecraft, railway rolling stock or sea-going vessels
• CPC Class Codes: G01R 31/11 using pulse reflection methods
• CPC Class Codes: G01R 31/50 Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections testing of sparking plugs H01T13/58

Abstract

The advantageous embodiments provide a method, a computer program product, and an apparatus for monitoring a wiring system. A number of responses to signals transmitted in a portion of the wiring system are measured to form a measured signature. Design data for the portion of the wiring system is retrieved. A number of expected responses for the signals in the portion of the wiring system are identified using the design data to form a computed signature. The measured signature is compared with the computed signature.

Claims

1. A method for monitoring a wiring system using a computer processor, the method comprising:

measuring a number of responses to signals transmitted in a portion of the wiring system to form a measured signature;

retrieving design data for the portion of the wiring system;

identifying a number of expected responses for the signals in the portion of the wiring system using the design data to form a computed signature; and

comparing using the computer processor the measured signature with the computed signature, including plotting the computed signature and the measured signature on a graph;

—

identifying a number of areas on the graph where a difference between the computed signature and the measured signature exceeds a specified threshold to form a number of identified areas; and

displaying the graph with the computed signature, the measured signature, and the number of identified areas on a display device.

2. The method of claim 1 further comprising:

responsive to identifying the number of areas on the graph where the difference exceeds the specified threshold, initiating an action for the wiring system.

3. The method of claim 2, wherein the action is selected from presenting an alert requesting an inspection of an identified area in the number of identified areas, sending the measured signature to a wiring system maintainer, and storing the measured signature and the difference in a diagnostic log associated with the wiring system.

4. The method of claim 1, wherein the step of measuring the number of responses to signals transmitted in the portion of the wiring system to form the measured signature is performed using time domain reflectometry, sequence time domain reflectometry, standing wave reflectometry, or spread-spectrum time domain reflectometry.

5. A computer program product comprising:

a non-transitory computer readable storage medium;

a first program code, stored on the computer readable storage medium, for measuring a number of responses to signals transmitted in a portion of the wiring system to form a measured signature;

a second program code, stored on the computer readable storage medium, for retrieving design data for the portion of the wiring system;

a third program code, stored on the computer readable storage medium, for identifying a number of expected responses for the signals in the portion of the wiring system using the design data to form a computed signature; and

a fourth program code, stored on the computer readable storage medium, for comparing the measured signature with the computed signature, wherein the fourth program code further comprises;

a fifth program code, stored on the computer readable storage medium, for plotting the computed signature and the measured signature on a graph;

a sixth program code, stored on the computer readable storage medium, for identifying a number of areas on the graph where a difference between the computed signature and the measured signature exceeds a specified threshold to form a number of identified areas; and

a seventh program code, stored on the computer readable storage medium, for displaying the graph with the computed signature, the measured signature, and the number of identified areas on a display device.

6. The computer program product of claim 5 further comprising:

responsive to identifying the number of areas on the graph where the difference exceeds the specified threshold, initiating an action for the wiring system.

7. The computer program product of claim 6, wherein the action is selected from presenting an alert requesting an inspection of an identified area in the number of identified areas, sending the measured signature to a wiring system maintainer, and storing the measured signature and the difference in a diagnostic log associated with the wiring system.

8. The computer program product of claim 6, wherein the first program code, stored on the computer readable storage medium, for measuring the number of responses to signals transmitted in the portion of the wiring system to form the measured signature further comprises an eighth program code for using time domain reflectometry, sequence time domain reflectometry, standing wave reflectometry, or spread-spectrum time domain reflectometry.

9. An apparatus comprising:

a bus;

a memory connected to the bus; and

a processor unit connected to the bus, wherein the processor unit is configured to;

measure a number of responses to signals transmitted in a portion of the wiring system to form a measured signature,

retrieve design data for the portion of the wiring system,

identify a number of expected responses for the signals in the portion of the wiring system using the design data to form a computed signature,

compare the measured signature with the computed signature;

plot the computed signature and the measured signature on a graph;

identify a number of areas on the graph where a difference between the measured signature and the computed signature exceeds a specified threshold to form a number of identified areas; and

display the graph with the computed signature, the measured signature, and the number of identified areas on a display device.

10. The apparatus of claim 9, wherein the processor unit is further configured to:

initiate an action for the wiring system responsive to identifying the number of areas on the graph where the difference exceeds the specified threshold.

11. The apparatus of claim 10, wherein the action is selected from presenting an alert requesting an inspection of an identified area in the number of identified areas, sending the measured signature to a wiring system maintainer, and storing the measured signature and the difference in a diagnostic log associated with the wiring system.

12. The apparatus of claim 9, wherein the number of test signals is a number of spread spectrum test signals, and wherein the processor unit being configured to send a number of test signals through a number of paths in the portion of the wiring system further comprises:

the processor unit being configured to send the number of spread spectrum test signals through the number of paths in the portion of the wiring system, wherein the number of spread spectrum test signals is modulated with a pseudo noise code.