| 摘要 |
A measuring method for non-intrusive rapid temperature changes in a direct-current excitation magnetic field. The method comprises: (1) placing ferromagnetic property particles on an object to be measured; (2) applying a direct-current magnetic field to an area where the ferromagnetic property particles are located so that the ferromagnetic property particles reach a saturation magnetization state; (3) obtaining a steady-state temperature T1 of the object to be measured at normal temperature, and calculating an initial spontaneous magnetization intensity M1 of the ferromagnetic property particles according to the steady-state temperature T1; (4) after the temperature of the object to be measured changes, measuring an amplitude value A of a magnetization intensity change signal of the ferromagnetic property particles after the temperature changes, and calculating and obtaining a temperature T2 after the change according to the amplitude value A of the magnetization intensity change signal; and (5) according to the temperature T2 after the change and the steady-state temperature T1, calculating and obtaining a temperature change value ΔT = T2 - T1. By means of the measuring method, under the non-intrusive condition, the temperature can be rapidly and accurately measured, thereby solving the technical problems of slow temperature measurement speed and low accuracy. |
