Borehole Logging Equipment Dual Axis Digital Inclinometer

Introduction

The inclinometer is an in-situ monitoring instrument for measuring the inclination and azimuth of a borehole. It is widely used in the fields of water conservancy and hydropower, mineral metallurgy, transportation and urban construction geotechnical engineering, and plays an important role in ensuring the safety of geotechnical engineering design, construction and use

The survey pipe is usually installed in a vertical borehole through the unstable soil layer to the stable formation below. A digital vertical mobile inclinometer probe, control cable, pulley device, and readout are used to observe the deformation of the inclinometer. The first observation can establish the initial section of the pipe deflection measurement. Subsequent observations will show the change in section displacement when the ground is moving. For observation, the probe moves from the bottom to the top of the inclinometer, pauses at a half-meter interval and performs the measurement tilt. The tilt of the probe is measured by two servo accelerometers with balanced forces. An accelerometer measures the longitudinal position of the groove of the inclinometer tube, that is, the inclination of the plane where the measuring wheel on the probe of the inclinometer is located. The other accelerometer measures the inclination perpendicular to the wheel plane. The inclination can be converted into lateral displacement. By comparing the current and initial observations, the amount of lateral shift can be determined, indicating the movement of the formation. Plotting the change in the offset gives a high resolution displacement profile. This section helps determine the magnitude, depth, direction, and rate of ground motion displacement.

Fundamental Theory of Operations