Method for measuring stress in a structural element
US6619136B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2002 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Feb 17, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L5/0047
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Displacement measuring means are fixed onto the structural element. A hole is drilled in the measurement zone and a supply pressure is applied to a flat actuator introduced into the hole. The displacements measured are analyzed as a function of the supply pressure to determine the stress from a supply pressure which roughly compensates for the deformation of the element due to the drilling of the hole. The measuring means comprise two arms that are fixed to the element at two respective anchoring points aligned parallel to a measuring direction, and at least two displacement sensors mounted on the arms on each side of the anchoring points to measure the variations in separation between the anchoring points. The arms leave between them a gap through which the hole is drilled at a central position with respect to the anchoring points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.