Stress history measurement method and stress sensor
US9835611B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2014 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | May 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0212
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
It is an object to provide a stress history measurement method and a stress sensor by which the stress history of an object being measured can be measured easily with high accuracy over a wide stress measurement range. In the stress history measurement method, the stress history to which the object being measured has been subjected is measured on the basis of the ratio of twinned calcite particles after the object to be measured has been subjected to an external force, the object having a stress sensor embedded therein and capable of being deformed elastically when being subjected to the external force, the sensor including a number of calcite particles. The stress sensor is configured such that a number of calcite particles are hardened by a resin with adjacent particles kept in contact with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.