Material testing method
US6918304B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2003 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Dec 29, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N3/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention aims to achieve accurate measurement and evaluation of mechanical properties of an object to be measured 1 without use of a force sensor. A weight 3 is attached to the object to be measured 1 to form a mass-spring system in which the object to be measured 1 serves as a spring element. Then vibration is applied to the mass-spring system to measure the inertial force acting on the weight 3 and the displacement of the weight 3 so that the mechanical properties of the object to be measured 1 will be evaluated based on the inertial force and displacement. A light wave interferometer 6 measures the displacement velocity of the weight 3 to calculate the inertial force from the acceleration determined by differentiating measured values of the displacement velocity of the weight 3 and calculate the displacement of the weight 3 by integrating the measured values of the displacement velocity of the weight 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.