Method and apparatus for examining the mechanical-dynamical properties of a workpiece
US6006608A · kind A · utility
Inventors
Key dates
| Filing date | Feb 27, 1998 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Feb 27, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0073
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Described is a procedure for investigating the mechanical-dynamic properties of a work piece, whereby the work piece is subjected to cyclical tensile and/or compression stress in a first direction. A power signal representing the tensile and/or compression stress of a work piece is produced with the use of a power-registering device and produces a length change representing at least one specified section of the work piece my means of a distance-registering device. The power signal and distance signal are fed to an evaluation device, which determines a characteristic value for the mechanical-dynamic properties of the specified section from the power signal and distance signal obtained during one stress cycle. The procedure is distinguished by the fact that the work piece provided with a raster made of contrasting coding strips along a second direction is continuously swept by a laser beam with a specified scanning frequency along the second direction, and the intensity of the laser light modulated by the coding strips is registered. The time path of the distance signal corresponds to the registered intensity of the modulated laser light, and the evaluation device determines, from th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.