System and method for time reversal data communications on pipes using guided elastic waves
US9413571B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 6, 2013 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Jun 26, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/4902
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embedded piezoelectric sensors in large civil structures for structural health monitoring applications require data communication capabilities to effectively transmit information regarding the structure's integrity between sensor nodes and to the central processing unit. Conventional communication modalities include electromagnetic waves or acoustical waves. While guided elastic waves can propagate over long distances on solid structures, their multi-modal and dispersive characteristics make it difficult to interpret the channel responses and to transfer useful information along pipes. Time reversal is an adaptive transmission method that can improve the spatiotemporal wave focusing. The present disclosure presents the basic principles of a time reversal based pulse position modulation (TR-PPM) method and demonstrates TR-PPM data communication by simulation. The present disclosure also experimentally demonstrates data communication with TR-PPM on pipes. Simulated and experimental results demonstrate that TR-PPM for data communications can be achieved successfully using guided elastic waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.