PHYSICAL AMOUNT MEASURING DEVICE AND PHYSICAL AMOUNT MEASURING METHOD

摘要

It is possible to estimate a reliable offset even if a vector physical amount to be measured is not a measured data group acquired in a uniform space. It is possible to further improve the reliability of the estimated offset. A vector physical amount data group is acquired by repeatedly detecting a vector physical amount containing a plurality of components. A differential vector group is calculated from the acquired vector physical amount data group so as to estimate a reference point contained in the vector physical amount data group acquired according to a predetermined evaluation equation using the calculated differential vector group. It is judged whether the calculated differential vector group is appropriate for estimation of the reference point and only a predetermined differential vector group is outputted for estimation in accordance with the judgment result. Moreover, reliability of the estimated reference point is judged by using the differential vector group and only a predetermined reference point is outputted as an offset according to the judgment result.