Method and system for testing magnetoelectric composite material sensor

Abstract

The invention provides a method and a system for testing a magnetoelectric composite material sensor, and the method comprises the steps: setting an initial-state direct-current magnetic field, and recording the initial-state induction voltage of a magnetoelectric composite material in the initial-state direct-current magnetic field; setting a first group of magnetic field increment values, recording corresponding different induced voltages of the magnetoelectric composite material in the initial-state direct-current magnetic field after the first group of magnetic field increment values are added, and taking the recorded different induced voltages corresponding to different magnetic fields as a first group of increment induced voltage values; calculating the change degree of the direct-current magnetic field corresponding to the induced voltage through the first group of magnetic field increment values and the first group of increment induced voltage values, and changing the direct-current magnetic field in the initial state by the magnetic field change step length, so that the direct-current magnetic field value when the induced voltage reaches the highest value is obtained; the optimization effect that the voltage change is controlled according to the small step magnetic field change to reach the maximum voltage value of the magnetoelectric composite material is achieved.

Description

technical field [0001] The invention belongs to the field of sensors, and in particular relates to a testing method and system for a magnetoelectric composite material sensor. Background technique [0002] The applicability and coupling between the cement-based magnetoelectric composite material and the concrete structure are excellent, and it has the same durability as the concrete. Using its efficient magnetic, force and electric multiple responses, excellent perception performance and sensitivity, the sensor, The multifunctional integration of drive and control plays an important role in the field of infrastructure engineering monitoring. [0003] Since the response relationship between the piezoelectric and magnetostrictive properties and the mechanical properties of the material is linear, it can be inferred that there is also a linear corresponding relationship between the magnetoelectric coupling response and the excitation signal. Firstly, according to the changing ...

AI Technical Summary

Problems solved by technology

[0004] In the patent literature with publication number CN103066201B, a multi-field coupling method for preparing magnetoelectric composite materials is provided. Although bonded magnets with preferred orientation can be prepared to improve their magnetoelectric properties, they still cannot effectively measure the magnetoelectric properties of magnetoelectric composite materials. magnetic induction change

Images