METHODS AND SYSTEMS FOR MONITORING STRUCTURES AND SYSTEMS

• US 20080167833A1
• Filed: 01/08/2007
• Published: 07/10/2008
• Est. Priority Date: 01/08/2007
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Georgeson, Gary E., Matsen, Marc R., Ayyagari, Arun, Westerman, Everett, Battles, Craig Farris, Porad, Kenneth, Blackwell, David, Ung, Kevin
• Granted Patent: US 7,705,725 B2
• Time in Patent Office: Days
• US Class Current: 702/122
• CPC Class Codes: G01N 2291/0258 Structural degradation, e.g. fatigue of composites, ageing of oils
• CPC Class Codes: G01N 2291/2694 Wings or other aircraft parts
• CPC Class Codes: G01N 29/14 using acoustic emission techniques echo of particles G01N29/046; measuring mechanical vibrations or acoustic waves in solids in general G01H1/00
• CPC Class Codes: G01N 29/2475 Embedded probes, i.e. probes incorporated in objects to be inspected
• CPC Class Codes: G01N 29/2481 Wireless probes, e.g. with transponders or radio links
• CPC Class Codes: G07C 5/008 communicating information to a remotely located station transmission systems for measured values G08C
• CPC Class Codes: G07C 5/085 using electronic data carriers

Abstract

Methods and systems for structural and component health monitoring are provided. A system includes a plurality of sensor systems positioned about an object to be monitored and a processing system communicatively coupled to at least one of said plurality of sensor systems wherein the processing system includes an ontology and reasoning module configured to model the object to be monitored, reason about the received sensor data associated with the object to be monitored and reason about the relationships between the received sensor data to fuse the data into contextual information for the overall object to be monitored and a contextual analyzer configured to transmit the received sensor data to said ontology and reasoning module and to store the information into a contextual information database.

Claims

1. A structural and component health monitoring system comprising:

a plurality of sensor systems positioned about an object to be monitored;

a processing system communicatively coupled to at least one of said plurality of sensor systems, said processing system comprises;

an ontology and reasoning module configured to model the object to be monitored, reason about the received sensor data associated with the object to be monitored and reason about the relationships between the received sensor data to fuse the data into contextual information for the overall object to be monitored; and

a contextual analyzer configured to transmit the received sensor data to said ontology and reasoning module and to store the information into a contextual information database.

2. A system in accordance with claim 1 further comprising a data acquisition module and sensor controller that permits said data acquisition module to retrieve real time and historical sensor data and contextual information from said sensor system.

3. A system in accordance with claim 1 further comprising a discovery module comprising at least one of a node discovery, a service discovery, and contextual information discovery wherein said node discovery is configured to determine a presence of a node, wherein said service discovery is configured to determine a service provided by the determined node, and wherein said contextual information discovery is configured to determine information relevant to the current context.

4. A system in accordance with claim 1 further comprising a contextual information database configured store sensor data fused by said ontology and reasoning module into contextual information for the overall object to be monitored.

5. A system in accordance with claim 1 further comprising an array sensing algorithm module comprising logic that governs at least one of the order in which specific sensor systems are interrogated and the periodicity of their respective interrogations.

6. A system in accordance with claim 1 further comprising a situation awareness analyzer configured to determine a present state of the object to be monitored, generate notification alerts in real time, and receive current and past contextual information generated by a contextual analyzer.

7. A system in accordance with claim 1 further comprising a situation awareness analyzer configured to receive discovery information from a discovery module, logic from the array sensing algorithm module, sensor data reported by a data acquisition module, and direct a sensor controller to interrogate a sensor system.

8. A system in accordance with claim 1 wherein said plurality of sensor systems comprises an ad hoc network configured to communicate sensor data between the plurality of sensor systems and an onboard processing system.

9. A system in accordance with claim 1 wherein at least one of said plurality of sensor systems comprises a flexible substrate.

10. A system in accordance with claim 1 wherein at least one of said plurality of sensor systems comprises an energy harvesting system.

11. A system in accordance with claim 1 wherein at least one of said plurality of sensor systems comprises a flexible film rechargeable battery.

12. A system in accordance with claim 1 wherein at least one of said plurality of sensor systems comprises a microprocessor that controls wireless communication between at least one of said sensor systems and an onboard processing system.

13. A method of monitoring the health of structures and system components, said method comprising:

positioning a plurality of sensor systems proximate an object to be monitored, said sensor systems each including one or more sensors configured to detect object data that is related to the object health;

wirelessly transmitting the data to at least one of another one of the plurality of sensor systems and a processing system; and

analyzing the data to determine a contextual relationship between each of the plurality of sensor systems and the received data such that a present state of the object is determined.

14. A method in accordance with claim 13 further comprising:

fusing data retrieved from a first sensor subsystem and a second sensor subsystem into a contextual form based on the sensor data type and sensor system location relative to the object and the others of the plurality of sensor systems at the time the data is sensed; and

storing the fused data and the raw sensor data within a local storage device onboard said sensor system.

15. A method in accordance with claim 13 further comprising transmitting fused data and raw sensor data from the sensor system to the processing system in response to a command from the processing system.

16. A sensor networking system for monitoring the health of an aircraft structure and system components related to the aircraft, said system comprising:

a plurality of sensor systems positioned about the aircraft, said sensor systems comprise a flexible substrate, an energy harvesting system, a rechargeable battery, and a microprocessor that controls wireless communication between at least one of said sensor systems and a processing system remote from said plurality of sensor systems, said plurality of sensor systems further comprising sensors including a plurality of different modalities; and

a processing system communicatively coupled to at least one of said plurality of sensor systems, said processing system configured to receive at least one of sensor data and fused sensor data, said processing system comprising a situation awareness analyzer configured to determine an overall present state of the aircraft by observing the events and activities within the aircraft structure and aircraft systems using the plurality of sensor systems and correlating individual data elements and behavioral models to deduce overall system state and behavior.

17. A system in accordance with claim 16 wherein said situation awareness analyzer is further configured to generate notification alerts in real time, and receive current and past contextual information generated by a contextual analyzer.

18. A system in accordance with claim 16 wherein said situation awareness analyzer is further configured to receive discovery information from a discovery module, logic from the array sensing algorithm module, sensor data reported by a data acquisition module, and direct a sensor controller to interrogate a sensor system.

19. A system in accordance with claim 16 further comprising an ontology and reasoning module configured to model the aircraft structure and system components related to the aircraft, reason about the received sensor data associated with the aircraft structure and system components related to the aircraft and reason about the relationships between the received sensor data to fuse the data into contextual information for the overall aircraft structure and system components related to the aircraft.

20. A system in accordance with claim 16 further comprising a contextual analyzer configured to transmit the received sensor data to an ontology and reasoning module and to store the information into a contextual information database.

21. A system in accordance with claim 16 further comprising a data acquisition module and sensor controller that permits said data acquisition module to retrieve real time and historical sensor data and contextual information from said plurality of sensor systems.

22. A system in accordance with claim 16 further comprising a discovery module comprising at least one of a node discovery, a service discovery, and contextual information discovery wherein said node discovery is configured to determine a presence of a node, wherein said service discovery is configured to determine a service provided by the determined node, and wherein said contextual information discovery is configured to determine information relevant to the current context.

23. A system in accordance with claim 16 further comprising a contextual information database configured store sensor data fused by said ontology and reasoning module into contextual information for the overall aircraft structure and system components related to the aircraft.

24. A system in accordance with claim 16 further comprising an array sensing algorithm module comprising logic that governs at least one of the order in which specific sensor systems are interrogated and the periodicity of their respective interrogations.

25. A system in accordance with claim 16 wherein said plurality of sensor systems comprises an ad hoc network configured to communicate sensor data between the plurality of sensor systems and an onboard processing system.