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Non-destructive evaluation method employing dielectric electrostatic ultrasonic transducers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 2003 |
| Description | An acoustic nonlinearity parameter (.beta.) measurement method and system for Non-Destructive Evaluation (NDE) of materials and structural members novelly employs a loosely mounted dielectric electrostatic ultrasonic transducer (DEUT) to receive and convert ultrasonic energy into an electrical signal which can be analyzed to determine the .beta. of the test material. The dielectric material is ferroelectric with a high dielectric constant .di-elect cons.. A computer-controlled measurement system coupled to the DEUT contains an excitation signal generator section and a measurement and analysis section. As a result, the DEUT measures the absolute particle displacement amplitudes in test material, leading to derivation of the nonlinearity parameter (.beta.) without the costly, low field reliability methods of the prior art. |
| File Size | 483434 |
| Page Count | 7 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080006013 |
| Archival Resource Key | ark:/13960/t36160961 |
| Language | English |
| Publisher Date | 2003-07-01 |
| Access Restriction | Open |
| Subject Keyword | Patents Nondestructive Tests Dielectrics Ultrasonic Wave Transducers Electrostatics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
