Two-dimensional static relative inclinometer

Abstract

The invention discloses a two-dimensional static relative inclinometer. The two-dimensional static relative inclinometer can simultaneously measure inclination change along two directions. The two-dimensional static relative inclinometer comprises a probe, a capacitive displacement sensing circuit, a control unit, a voltage amplifier circuit and an analog-digital conversion circuit. The probe is composed of a test mass and a capacitance plate framework. In work, the test mass is suspended in the center of the capacitance plate framework by an electrostatic force; in a vertical direction, 600-1000V of control voltage is used so that the gravity of the test mass is overcome; and in a horizontal direction, less than 10V of control voltage is used so that a gravity component force produced by base inclination is balanced. Through detection of control voltage in two horizontal directions, information of inclination change in the two horizontal directions can be obtained. Only through the two-dimensional static relative inclinometer, two-dimensional detection of an inclination change is finished. A mechanical support between the test mass and the outer framework is avoided and thus the problem that the traditional pendulum gravimeter produces mechanical drift is solved.

Description

technical field [0001] The invention belongs to the field of tilt change measuring instruments, and more specifically relates to a two-dimensional electrostatic relative inclinometer. Background technique [0002] The inclinometer is an important instrument for measuring the earth's inclined solid tide and monitoring the foundation inclination of major infrastructures (dams, nuclear power plants, etc.), and has very important applications in the fields of geophysics and construction engineering research. Inclinometers are divided into long baseline inclinometers and short baseline inclinometers. The former mainly includes water pipe inclinometers, and the latter mainly includes horizontal pendulum inclinometers and so on. [0003] The basic structure of the water pipe inclinometer is to connect two bowls with a water pipe. According to the principle of keeping the liquid level in the connecting pipe at a natural level, when the relative height of the foundation at both end...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this type of instrument is that due to the mechanical connection between the proof mass and the frame, there must be mechanical drift caused by this

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