CONDITION, HEALTH, AND USAGE MONITORING SYSTEM

• US 20110018703A1
• Filed: 07/23/2009
• Published: 01/27/2011
• Est. Priority Date: 07/23/2009
• Status: Active Grant

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Tracy, Terry A., Moslehi, Behzad, Ruderman, Gregory A.
• Granted Patent: US 8,659,422 B2
• Time in Patent Office: Days
• US Class Current: 340/521
• CPC Class Codes: B64G 1/403 Solid propellant rocket engines
• CPC Class Codes: F02K 9/32 Constructional parts; Details not otherwise provided for
• CPC Class Codes: F02K 9/96 characterised by specially adapted arrangements for testing or measuring
• CPC Class Codes: F42B 35/00 Testing or checking of ammunition apparatus for measuring the energy of projectiles G01L5/14

Abstract

A sensor module includes a number of environment sensors and condition sensor interfaces. Each condition sensor interface is configured to couple with a condition sensor capable of sensing an attribute of a component exposed to the environment. The sensor module may be embedded within a structure associated with the component. For example, in the context of a solid rocket motor, the sensor module may be embedded within the exhaust plug.

Claims

1. A sensor module comprising:

a plurality of environment sensors, each environment sensor capable of sensing an attribute of an environment;

a plurality of condition sensor interfaces, each condition sensor interface configured to couple with a condition sensor capable of sensing an attribute of a component exposed to the environment.

2. The sensor module of claim 1, further including:

a housing;

a controller within the housing and coupled to the plurality of environment sensors and the plurality of condition sensor interfaces, the controller configured to receive environment data associated with the attributes sensed by the environment sensors, and to receive condition data associated with the attributes sensed by the condition sensor interfaces;

a memory coupled to the controller, the memory configured to store the condition data and environment data;

a communication module coupled to the controller, the communication module configured to communicate all or a part of the condition data and the environment data to an external device;

a power source coupled to the controller.

3. The sensor module of claim 2, wherein the communication module includes a direct data link and a wireless transceiver.

4. The sensor module of claim 2, wherein the housing is configured to be integrated into structure adjacent to the environment.

5. The sensor module of claim 4, wherein the component is a solid rocket component, and wherein the housing is configured to be integrated into a exhaust plug coupled to the solid rocket component.

6. The sensor module of claim 1, wherein the environment sensors are selected from the group consisting of temperature sensors, shock sensors, vibration sensors, acceleration sensors, humidity sensors, liquid presence sensors and tamper-event sensors.

7. The sensor module of claim 1, wherein the condition sensor interfaces are configured to be coupled with sensors selected from the group consisting of strain sensors, temperature sensors, moisture sensors, and degradation-gas sensors.

8. The sensor module of claim 7, wherein at least one of the condition sensor interfaces is configured to interface with an optical fiber that is embedded within the component and is configured to communicate a signal associated with at least one of the condition attributes.

9. The sensor module of claim 8, wherein the optical fiber is configured to communicate a signal associated with at least two of the condition attributes.

10. The sensor module of claim 8, wherein the optical fiber includes a plurality of fiber Bragg grating sensors distributed along its length.

11. The sensor module of claim 8, wherein the optical fiber includes a polymeric coating that responds to the presence of a predetermined gas.

12. The sensor module of claim 2, wherein only the n highest and/or m lowest values of the condition data are stored for at least some of the condition attributes, where n and m are predetermined integers.

13. The sensor module of claim 2, wherein only the n highest and/or m lowest values of the environment data are stored for at least some of the environment attributes, where n and m are predetermined integers.

14. The sensor module of claim 2, wherein the communication module is configured to enter a monitoring mode at predetermined periods, and during the monitoring mode listen for a synchronization signal indicating that a communication event is to take place.

15. The sensor module of claim 2, wherein the power source is configured to receive energy via one or more energy harvesting components coupled thereto.

16. A method of assessing the health of a component exposed to an environment, the method comprising:

embedding a plurality of condition sensors within the component, each condition sensor capable of sensing an attribute of the component;

providing a sensor module within the environment, the sensor module including a plurality of environment sensors, each environment sensor capable of sensing an attribute of the environment;

acquiring, via the sensor module, condition data from the condition sensors and environment data from the environment sensors;

transferring the condition data and environment data to an external device;

assessing the health of the component based on the condition data and the environment data.

17. A health and usage monitoring system comprising:

a plurality of condition sensors embedded within a component, each condition sensor capable of sensing an attribute of the component as it is exposed to an environment;

a sensor module comprising a plurality of environment sensors, each environment sensor capable of sensing an attribute of the environment; and

a plurality of condition sensor interfaces, each condition sensor interface configured to couple with one or more of the condition sensors;

a controller configured to store data associated with the attributes of the environment and the attributes of the component; and

a communication module coupled to the controller and configured to wirelessly transmit the data to an external device.

18. The system of claim 17, wherein the component comprises a solid rocket component, and the sensor module is configured to be embedded within a exhaust plug of the solid rocket component.

19. The system of claim 17, wherein the plurality of condition sensors include at least one fiber having a plurality of fiber Bragg gratings incorporated therein.

20. The system of claim 17, further including a power source within the sensor module.