Method and apparatus for reducing crosstalk in a structural health monitoring system
US7596078B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2005 |
| Grant date | Sep 29, 2009 |
| Priority date | — |
| Expiry date | Jul 23, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus for reducing crosstalk in a structural health monitoring system. A pair of actuator input signals are sent to an actuator, each resulting in the transmission of stress waves to a corresponding sensor. The sensor then converts these stress waves to a pair of output signals, each having a crosstalk portion due to electromagnetic interference from the input signals to the actuator, and a stress wave portion corresponding to the stress waves. Various methods of varying the actuator input signals, the input to the actuator, and the output of the sensor result in two output signals that can be combined so as to reduce the crosstalk portions and isolate the stress wave portions. This allows actuators and sensors to be placed sufficiently close together that the stress wave portions of sensor output signals can overlap their crosstalk, without corrupting or otherwise compromising the data contained therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.