SYSTEM AND METHOD FOR EVALUATING REMAINING LIFE OF AN OPERATIVE SUB-SYSTEM OF A VEHICLE

• US 20160025590A1
• Filed: 07/23/2014
• Published: 01/28/2016
• Est. Priority Date: 07/23/2014
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Munger, Cary D., Griffin, Steven F., Smith, Nicholas Samuel Lee
• Granted Patent: US 9,683,913 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B64D 2045/0085 Devices for aircraft health monitoring, e.g. monitoring flutter or vibration
• CPC Class Codes: G01M 17/007 Wheeled or endless-tracked vehicles G01M17/08 takes precedence
• CPC Class Codes: G01M 7/025 Measuring arrangements
• CPC Class Codes: G01M 7/08 Shock-testing
• CPC Class Codes: G07C 5/0808 Diagnosing performance data testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005

Abstract

A vehicle may include an operative sub-system positioned within a body of the vehicle, and a sensor assembly secured to the operative sub-system. The sensor assembly may include at least one sensor configured to detect vibration or shock energy, directed into the operative sub-system; and a processing unit configured to determine damage to the operative sub-system as damage data that is based on one or both of a magnitude and duration of the vibration or shock energy detected by the sensor(s). The sensor assembly may be self-powered.

Claims

1. A vehicle comprising:

an operative sub-system positioned within a body of the vehicle; and

a sensor assembly secured to the operative sub-system, wherein the sensor assembly includes;

(a) at least one sensor configured to detect vibration or shock energy directed into the operative sub-system; and

(b) a processing unit configured to determine damage to the operative sub-system as damage data that is based on one or both of a magnitude and duration of the vibration or shock energy detected by the at least one sensor.

2. The vehicle of claim 1, wherein the sensor assembly further comprises a memory in communication with the processing unit, wherein the processing unit is configured to determine a remaining life of the operative sub-system as a function of the damage data and full life data stored in the memory.

3. The vehicle of claim 2, wherein the full life data is empirically determined and stored in the memory.

4. The vehicle of claim 2, wherein the full life data is pre-set and stored in the memory.

5. The vehicle of claim 1, wherein the at least one sensor comprises a piezo ceramic sensor that is configured to generate an electrical signal in response to the vibration or shock energy, wherein the processing unit is powered through the electrical signal, and wherein the processing unit analyzes the electrical signal to determine the damage data.

6. The vehicle of claim 5, wherein the sensor assembly further comprises an energy generating power supply connected to the piezo ceramic sensor, wherein the energy generating power supply is configured to receive the electrical signal from the piezo ceramic sensor and output a stable voltage that powers the processing unit.

7. The vehicle of claim 1, wherein the sensor assembly is configured to be in communication with a damage analysis system.

8. The vehicle of claim 1, wherein the sensor assembly further comprises a temperature sensor configured to detect a temperature with respect to the operative sub-system, wherein the processing unit is configured to receive temperature data from the temperature sensor.

9. The vehicle of claim 1, wherein the at least one sensor comprises one or more of a piezo electric element, an accelerometer, a temperature sensor, a torque sensor, a strain gauge, a pressure sensor, a magnetic field sensor, a differential variable reluctance transducer, or a linear variable differential transformer.

10. A sensor assembly configured to determine a remaining life of an operative sub-system of a vehicle, the sensor assembly comprising:

at least one sensor configured to detect vibration or shock energy directed into the operative sub-system;

a processing unit configured to determine damage to the operative sub-system as damage data that is based on one or both of a magnitude and duration of the vibration or shock energy detected by the at least one sensor; and

a memory in communication with the processing unit, wherein the processing unit is configured to determine the remaining life of the operative sub-system as a function of at least the damage data and full life data stored in the memory.

11. The sensor assembly of claim 10, wherein the full life data is one of analytically determined and stored in the memory, or pre-set and stored in the memory.

12. The sensor assembly of claim 10, wherein the at least one sensor comprises a piezo ceramic sensor that is configured to generate an electrical signal in response to the vibration or shock energy, wherein the processing unit and the memory are powered through the electrical signal, and wherein the processing unit analyzes the electrical signal to determine the damage data.

13. The sensor assembly of claim 12, wherein the sensor assembly further comprises an energy generating power supply connected to the piezo ceramic sensor, wherein the energy generating power supply is configured to receive the electrical signal from the piezo ceramic sensor and output a stable voltage that powers the processing unit.

14. The sensor assembly of claim 12, wherein the sensor assembly further comprises a temperature sensor configured to detect a temperature with respect to the operative sub-system, wherein the processing unit is configured to determine the remaining life of the operative sub-system as a function of at least the damage data, a temperature data, and the full life data.

15. The sensor assembly of claim 10, wherein the at least one sensor comprises one or more of a piezo electric element, an accelerometer, a temperature sensor, a torque sensor, a strain gauge, a pressure sensor, a magnetic field sensor, a differential variable reluctance transducer, or a linear variable differential transformer.

16. A method of determining a remaining life of an operative sub-system of a vehicle, the method comprising:

determining a full life of the operative sub-system of the vehicle;

storing full life data related to the full life of the operative sub-system in a memory of a sensor assembly secured to the operative sub-system;

using at least one sensor of the sensor assembly to detect vibration or shock energy directed into the operative sub-system;

using at least one processing unit of the sensor assembly to determine damage to the operative sub-system as damage data that is based on one or both of a magnitude and duration of the vibration or shock energy detected by the at least one sensor; and

determining the remaining life of the operative sub-system as a function of at least the damage data and full life data stored in the memory.

17. The method of claim 16, wherein the determining a full life of the operative sub-system of the vehicle comprises one of analytically determining the full life, or pre-setting the full life.

18. The method of claim 16, further comprising:

generating an electrical signal in response to the vibration or shock energy;

powering the processing unit and the memory through the electrical signal; and

using the processing unit to analyze the electrical signal to determine the damage data.

19. The method of claim 16, further comprising detecting a temperature with respect to the operative sub-system.

20. The method of claim 19, further comprising using the processing unit to determine the remaining life of the operative sub-system as a function of at least the damage data, a temperature data, and the full life data.