Patent ID: 6176128
Filing Date: 2001-01-23
Classification: G01B,G01D

Abstract:
A borehole tilt meter for measuring tilt of the ground or a solid construction comprising:a hollow cylindrical receptacle having inner and outer walls;a pendulum, as a mass to respond to the gravitational force, placed near a lateral side of said receptacle;metal fittings attached on the inner side wall of said receptacle;metal flat springs to suspend said pendulum and to restrict the rotation direction of said pendulum;displacement detection means placed near the lateral side of the receptacle to measure the displacement of said pendulum;power lines for powering said detection means to measure tilt direction of the ground or a solid construction;recorder means installed on the ground to record the signals from said displacement detection means;wires placed near the lateral side of said receptacle for transmitting electrical signals from said detection means to said recorder means and said power lines;wherein the middle of said receptacle has sufficient cavity space to permit insertion of many wires relating to other tilt meters installed lower in a given borehole, thereby achieving a multiple instruction.