US Patent 10048154 Boom calibration system

A method of calibrating strain sensors operatively associated with a machine may involve the steps of: Calculating, for each of n loading conditions, at least one structural load associated with at least one member of the machine to produce n calculated structural loads corresponding to the n loading conditions; measuring, for each of n machine positions, at least one strain associated with the at least one member of the machine to produce n measured strains corresponding to the n loading conditions; and determining curve fit parameters from said n calculated structural loads and said n measured strains, the curve fit parameters relating measured strain and structural loads over n loading conditions.