Loose rock detector
US5024090A · kind A · utility
10Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1989 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Sep 15, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02827
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A loose rock detector comprises an impact tool for hitting the rock face, sensors for detecting acoustic, rock motion and/or impact force signals generated by movement of the impact tool against the face of the rock, a data processor responsive to the sensors for correlating the above signals in the time and/or frequency domain against predetermined relationships to detect loose rocks and to assess mass and degree of looseness of the rock, and a display unit for displaying the results of the correlation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.