Method of and a system for measuring a stress or a stress distribution, using a stress luminescent material
US6628375B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2000 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | May 22, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention is to provide a method and a system which, by making use of a stress luminescent material, renders it possible to directly observe a stress distribution on the base of a real time without electrical contacts, and to easily measure a stress or a stress distribution and a stress image. Essentially, the invention comprises the steps of adding a stress to a tested body containing a stress luminescent material whose light emission is proportional to the stress, making visually observable a stress distribution over the tested body in accordance with a luminous intensity of the stress luminescent material contained in the tested body, measuring the luminous intensity of the luminescent material of the tested body, comparing the measured value of the luminous intensity with certain correlation data indicating a relationship between the luminous intensity of the stress luminescent material and a stress, thereby obtaining a stress value or a stress distribution over the tested body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.