Method and device for measuring magnetic mechanical characteristics of material

Abstract

The invention relates to the field of magnetic mechanical characteristic measurement. The invention discloses a method and a device for measuring magnetic mechanical characteristics of a material, and the method comprises the following steps: S1, a resistance strain gauge is obtained, the resistance strain gauge is placed in a variable magnetic field, and the corresponding relation between the induced voltage outputted by the resistance strain gauge and the magnetic flux density of the variable magnetic field is calibrated; S2, the resistance strain gauge is installed on the to-be-measured surface of a to-be-measured material, an alternating magnetic field is applied to the to-be-measured material for excitation, a working power source is provided for the resistance strain gauge, the strain of the to-be-measured material is obtained through a resistance change signal of the resistance strain gauge, and meanwhile through the induced voltage output by the resistance strain gauge, in combination with the corresponding relation in the step S1, the corresponding magnetic flux density is obtained. The strain and the magnetic flux density are measured simultaneously by adopting the resistance strain gauges, so that the number of sensors and the number of leads are reduced by half, the measurement cost is reduced, and the accuracy of a measurement result is not influenced.

Description

technical field [0001] The invention belongs to the field of measuring magnetomechanical properties, in particular to a method and device for measuring magnetomechanical properties of materials. Background technique [0002] In the process of studying the magnetomechanical properties of magnetic materials, it is usually necessary to measure the magnetic flux density inside the material and the strain in all directions of the material. At present, the methods of installing magnetic field induction coils (sensors) on the surface of material samples for magnetic flux density measurement and strain gauges (sensors) for strain measurement are generally used. This method requires a large number of sensors, many leads, high cost, and difficult operation. . [0003] Such as figure 1 The situation where the magnetic field induction coil 12 and the strain gauge 11 are respectively installed on the 3 surfaces (X surface, Y surface and Z surface) of the material sample 10 are shown, t...

AI Technical Summary

Problems solved by technology

At present, the methods of installing magnetic field induction coils (sensors) on the surface of material samples for magnetic flux density measurement and strain gauges (sensors) for strain measurement are generally used. This method requires a large number of sensors, many leads, high cost, and difficult operation.

[0003] like figure 1 The situation where the magnetic field induction coil 12 and the strain gauge 11 are respectively installed on the 3 surfaces (X surface, Y surface and Z surface) of the material sample 10 are shown, then a total of 6 sensors are needed, and during the implementation of the measurement, each Each sensor needs 2 lead wires, and 6 sensors need 12 lead wires in total. Furthermore, in order to improve the accuracy of material magnetic flux density measurement, researchers will install magnetic field induction coils and strain gauges on each surface of material sample 10, such as figure 1 If magnetic field induction coils and strain gauges are installed on the six surfaces of the material sample 10, a total of 12 sensors are needed, resulting in the doubling of the total number of lead wires to 24, and the number of measured signals reaches 12, which is not only costly, but also gives The implementation of the measurement process poses great difficulties

Images