Three-dimensional strain monitor for rock boreholes
US5113707A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 2, 1991 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | May 2, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a device for monitoring strain or deformation within rock boreholes in three-dimension. The device comprises in general a vibrating wire strain monitor for monitoring strain or deformation in an axial direction with respect to the borehole axis interposed between two other vibrating wire string monitors which monitor strain or deformation in radial directions with respect to the borehole axis. The radial vibrating wire strain monitors each have elements by which they may be anchored within a borehole. Together, the three vibrating wire strain monitors monitor strain or deformation in three orthogonal directions within a borehole. The combination allows the axial vibrating wire strain monitor to utilize the radial vibrating wire strain monitor's anchors thereby eliminating their requirement to provide separate anchoring means therefor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.