Theoretical analysis of magnetic sensor output voltage

The output voltage is an important parameter to determine the stress state in magnetic stress measurement, the relationship between the output voltage and the difference in the principal stresses was investigated by a comprehensive application of magnetic circuit theory, magnetization theory, stress analysis as well as the law of electromagnetic induction, and a corresponding quantitative equation was derived. It is drawn that the output voltage is proportional to the difference in the principal stresses, and related to the angle between the principal stress and the direction of the sensor. This investigation provides a theoretical basis for the principle stresses measurement by output voltage.

Research highlights
► A comprehensive investigation of magnetic stress signal.
► Derived a quantitative equation about output voltage and the principal stresses.
► The output voltage is proportional to the difference of the principal stresses.
► Provide a theoretical basis for the principle stresses measurement.