Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Earth stresses
Patent
1994-07-19
1996-04-30
Raevis, Robert
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Earth stresses
G01B 500
Patent
active
055114296
ABSTRACT:
A three-dimensional displacement measuring system measures the three-dimensional displacement of a mass such as rock. A first cylindrical member is provided as a displacement indicating device and is arranged on one side of a discontinuous surface, such as a crack, in a bore hole in the rock. The bore hole extends across the discontinuous surface. A second cylindrical member is provided as a displacement measuring device on the other side of the discontinuous surface and is free to displace relative to the mass and the first cylindrical member and is located opposite to the first cylindrical member.
REFERENCES:
patent: 4627734 (1986-12-01), Rioux
patent: 4813278 (1989-03-01), Kosugi
patent: 5113707 (1992-05-01), Herget
patent: 5301003 (1994-04-01), Ikeda
Kosugi Masayuki
Tamai Akio
Agency of Industrial Science and Technology
Obayashi Corporation
Raevis Robert
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