PRECISE TILTMETER AND INCLINOMETER BASED ON COMMERCIAL FORCE COMPENSATION WEIGH CELLS

M. Kühnel, M. Rivero, C. Diethold, F. Hilbrunner, T. Fröhlich

Abstract

High precision measurements and monitoring of tilt or inclination are essential in the field of ultraprecise force and mass measurements. We present a new concept for high resolving tilt / inclination measurements. Therefore a commercial electromagnetic force compensation (EMC) weigh cell is mounted in a hanging position and loaded with a defined weight. Thus the system conforms to a pendulum. By measuring the tilt depended deflection of the pendulum with the position sensor of the weigh cell we achieved a standard deviation of 7.1 nrad (3.4 nrad filtered) within a sampling time of 15 min. In future investigations we will compensate the deflection and take the compensation force as a measure for the tilt.

Keywords

tiltmeter, inclinometer, electromagnetic force compensation

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IMEKO-TC3-2014-010.pdf

DOI

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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