?E MEASUREMENT DEVICE FOR MINIMIZING EXTERNAL MAGNETIC DISTURBANCE

摘要

The present invention relates to a ?E measurement device for minimizing an external magnetic disturbance, and more specifically, to a ? E measurement device for measuring a change (? E) of Young's modulus in a magnetic field by using a magneto-acoustic resonance method and removing the bias effect caused by a geomagnetic field, magnetic equipment, and a magnetic apparatus. According to the present invention, a space for minimizing an external magnetic disturbance by using triaxial Helmholtz coils is provided, and the ? E measurement device having a plurality of coil structures is inserted thereinto, thereby minimizing the external magnetic disturbance.