Measuring and testing – Vibration – Loose object detection
Patent
1989-09-15
1991-06-18
Williams, Hezron E.
Measuring and testing
Vibration
Loose object detection
73594, 73602, G01N 330
Patent
active
050240900
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.
REFERENCES:
patent: 4281547 (1981-08-01), Hinshaw et al.
patent: 4318302 (1982-03-01), Choi
patent: 4598588 (1986-07-01), Hanson
patent: 4702111 (1987-10-01), Holland
patent: 4858469 (1989-08-01), Hosgood et al.
Mining Engineering, Mar. 1986, p. 158 Entitled: "Bureau Develops Device to Detect Unstable Roof Rock". (Industry Newswatch).
Lux Eric G.
Mason Victor A.
Pettigrew Michel J.
Rhodes David B.
Finley Rose M.
HDRK Mining Research Limited
Mulligan, Jr. Francis J.
Steen Edward A.
Williams Hezron E.
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