Method and apparatus for measuring stress
US4522071A · kind A · utility
26Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1983 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Jul 28, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0427
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining stress in a material independent of micro-structural variations and anisotropies. The method comprises comparing the velocities of two horizontally polarized and horizontally propagating ultrasonic shear waves with interchanged directions of propagation and polarization. The apparatus for carrying out the method comprises periodic permanent magnet-electromagnetic acoustic transducers for generating and detecting the shear waves and means for determining the wave velocities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.