Acoustic sensor systems for identification of arbitrary waves

9,459,137

14/165065

January 27, 2014

Arbitrary wave loads are detected and reconstructed by a sensor system based on an inverse mechanism of continuous structure responses. A sensor system comprising a sensing component configured with a sandwich-structured beam of composite materials can generate the structural responses as a moving wave propagates across the beam. In one example, an Arnoldi-Tikhonov algorithm coupled with generalized cross-validation technique can be utilized to determine a regularization parameter that is utilized to compensate for the presence of noise in the wave load and/or the highly ill-posed problems of the inverse matrix that is utilized for wave reconstruction. Further, the Tikhonov algorithm can be utilized to reconstruct wave loads (e.g., at different location on the beam and/or different times) based on the structural response parameters and the regularization parameter. As an example, an image of the determined wave load values can be rendered in three dimensions (3-D) versus time and location.

ENJOYOR COMPANY LIMITED (Hangzhou, CN)

ENJOYOR COMPANY LIMITED (Hangzhou, CN)

1. A system, comprising: a wave load sensor comprising a sandwich-structured beam that is fabricated by employing composite materials, wherein the wave load sensor is employable to sense an arbitrary acoustic wave; and the executable components comprising: a sensing component configured to determine displacement response parameter data as the arbitrary acoustic wave is determined to propagate through the sandwich-structured beam; and an analysis component configured to determine, based on an inverse analysis that employs the displacement response parameter data, load data representing the arbitrary acoustic wave.

2. The system of claim 1 , wherein the sandwich-structured beam comprises a core material inserted between two facings.

3. The system of claim 2 , wherein the core material comprises a foam core.

4. The system of claim 2 , wherein the two facings comprise a carbon facing or an epoxy facing.

5. The system of claim 2 , wherein the sandwich-structured beam is bonded to an elastic foundation base comprising at least a defined elasticity characteristic.

6. The system of claim 5 , wherein the elastic foundation base comprises a rubber base.

7. The system of claim 1 , wherein the sensing component is configured to determine the displacement response parameter data based on time-of-flight measurement data.

8. The system of claim 1 , wherein the executable components further comprise: a regularization component that is configured to select, based on employing an Arnoldi-Tikhonov process and a generalized cross-validation process, regularization parameter data that is utilized to compensate for an error introduced during the inverse analysis, wherein the error is introduced in a solution of an inverse matrix having a conditioning number that satisfies a defined ill-conditioning criterion.

9. The system of claim 8 , wherein the executable components further comprise: an arbitrary wave reconstruction component that is configured to determine the load data based on the regularization parameter data.

10. The system of claim 1 , wherein the analysis component is further configured to determine, based on the inverse analysis, load data representing the arbitrary acoustic wave at a specified location on the sandwich-structured beam.

11. The system of claim 1 , wherein the analysis component is further configured to determine, based on the inverse analysis, load data representing the arbitrary acoustic wave at a specified time.

12. The system of claim 1 , wherein the analysis component is further configured to determine, based on the inverse analysis, direction data indicative of a direction of propagation of the arbitrary acoustic wave.

13. A method, comprising: sensing an arbitrary acoustic wave propagating through a wave load sensor that comprises a layered beam structure made of composite materials; as a function of the sensed arbitrary acoustic wave, determining, by a system, displacement response parameter data associated with the layered beam structure; based on an inverse analysis that employs the displacement response parameter data, determining load data; and based on the load data, facilitating a reconstruction of the arbitrary acoustic wave.

14. The method of claim 13 , wherein the determining the displacement response parameter data comprises determining the displacement response parameter data based on time-of-flight measurement data.

15. The method of claim 13 , wherein the determining the load data comprises determining a load associated with the arbitrary acoustic wave at least one of at a specified time or a specified location on the layered beam structure.

16. The method of claim 13 , further comprising: based on the load data, facilitating a rendering a three-dimensional image of the arbitrary wave.

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