Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Earth stresses
Patent
1990-11-05
1991-08-20
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Earth stresses
G01B 716
Patent
active
050404210
ABSTRACT:
A protective tube is vertically buried in the ground, and sinking elements for generating magnetism are buried at plural positions at different depths in the ground outside the side wall of this tube. Magnetic sensors capable of detecting magnetism are disposed in the tube to detect the magnetism generated by the sinking elements, and the depth position of the sinking elements in the ground is measured according to the detected signal, so that the fluctuations by settlement or uplift of the ground may be known by each bed differing in depth. A plurality of magnetic sensors are fixed to the side wall surface of the tube, corresponding to the individual sinking elements.
Kimura Koichi
Mihara Kenichiro
Miyamoto Kazuma
Kidoh Construction Co., Ltd.
Kidoh Technical Ins. Co., Ltd.
Myracle Jerry W.
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