Calibration enhancement of ShapeAccelArray technology for long term deformation monitoring applications

Abstract

ShapeAccelArray (SAA) provides precise 3D position along a continuum using hundreds of low cost MEMS sensors. The technology has been applied to long term soil monitoring applications, where long-term accuracies in the 50 part-per-million (ppm) range have been achieved. Industrial demand for the technology in structural monitoring applications where 10 ppm would be desirable has magnified the importance of modelling and compensating for temperature sensitivities of each sensor. In such applications, dramatic temperature changes are possible, unlike the relatively stable, sub surface environment.