| 摘要 |
PURPOSE:To simply measure the intensity of magnetic field or its gradient by using a parent material which is a temp. indicating substance with the color changing at a specific temp., and providing it on the surface with a magnetic resonant material layer which generates magnetic resonance. CONSTITUTION:A magnetic field measuring material 3A uses a parent material which is a temp. indicating substance 1 whose color changes at a specific temp., and a magnetic resonant material layer 2 generating magnetic resonance is provided on the surface of this parent material, and the uniformity of the magnetic field is measured from the distribution of the magnetism intensity. When the magnetic resonance layer 2 emits heat due to absorption of the electromagnetic energy in association with magnetic resonance, the color of this parent material consisting of temp. indicating substance 1 changes at the corresponding resonant plate. Therefore, the measuring material 3A is put in a place whose uniformity is to be measured, and it is irradiated with an electromagnetic wave of a frequency where nucleus or unpaired electron is resonantly absorbed with the target magnetic field intensity. This causes color change only in the region which has hot the target magnetic field intensity, and a region where the magnetic field is made constant, is simply measurable. The degree of color change is proportional to the intensity of the magnetic field. This, it is possible to easily judge and evaluate the uniformity of the magnetic field intensity by watching the distribution of the degree of color change over the whole temp. indicating substance 1. |
