Estimating uncertainties for the driving torque in continuous flight Augur machine during space sampling drilling operation

Abstract

Abstract Auger drilling operation is considered as one of the ideal ways for space sampling as it depends on a dry drilling method. This study represents a measurement uncertainty model for the driving torque in Continuous Flight Augur machine during soil drilling operation. The measuring system is established to provide a simple way for driving torque measurement that involves the usage of a combination of different sensors. A simple data acquisition software is resolved using Labview® software package. This program enables displaying and recording the directly measured data mainly from transducers. Type-A and type-B uncertainties are estimated in detail for measuring results. The two different types are combined to evaluate the deviation of readings resulted from several sources. The overall system accuracy for the drilling torque is derived from estimating uncertainties of the measured torque. An error bar is provided for each reading to indicate the possible deviation with 95 % level of confidence. Uncertainty detailed calculation for the driving torque in Continuous Flight Auger machine during drilling operation is computed as a function of the directly measured values.