Structural health monitoring system employing electromechanical impedance technology
US9664649B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 16, 2013 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Jun 27, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2694
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method to acquire the structural health state of an aircraft mechanical component performs measurements at each frequency point of interest by using a network of transducers and working each one simultaneously as actuator and sensor. Each transducer is individually excited by a sinusoidal, constant frequency and arbitrary amplitude, voltage waveform for each arbitrary frequency point used to interrogate the structure. A dedicated hardware executes an analogical (analog) quantization to measure electrical current and average electrical power consumed by each transducer. With these two variables, the electromechanical signature of the structure is obtained at different areas of the monitored structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.