Measuring device, rock breaking device and method of measuring stress wave
US7895900B2 · kind B2 · utility
2Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2007 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Nov 11, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B44/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a method of measuring a stress wave and to a measuring device and a rock breaking device. A percussion device (7) gives impact pulses to a waveguide (21), where a compression stress wave and a reflected tensile stress wave are generated, which propagate in the waveguide. The compression stress wave causes an extension in the waveguide and the tensile stress wave a thinning, in which case properties of the waveguide may be determined by measuring geometric changes in the cross section of the waveguide. The measurement data are utilized in controlling the rock breaking device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.