Requirements for 3-D magnetostriction measurement instruments

This paper concerns the requirement analysis and implementation of a measurement instrument, which can identify the 3-D magnetostriction strain. To measure magnetostriction, a high-accuracy magnetic flux density and strain measurement are required, while the mechanical stress in the sample is minimized. The full block tester is proposed as a measurement instrument. In this instrument, homogeneity of flux density within the measured sample and the strain measurement resolution are sufficient, but stress caused by magnetic forces is higher than required