| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device for detecting the generation and characteristics of a magnetic field intensity by visualizing the magnetic field intensity as a force acting on a needle attached with a micro magnet and at the same time by quantitatively measuring the force to solve a problem in measuring or learning the magnetic field intensity that by using iron powder, the aspect of the force at the moment when the magnetic field acts, and the force cannot be measured, it is insufficient to understand the magnetic force and the characteristics of the current flowing in a coil, and also the magnetic field intensity cannot be measured quantitatively. Ž<P>SOLUTION: The device includes: an electrically insulative plastic cylinder 1; an electromagnetic coil 5 for generating a magnetic field consisting of a coil in which an electric wire coated with an insulative coat is wound by a plurality of turns around the plastic cylinder 1; a fixing plate 2 for fixing the one end of two elastic bodies 15a, 15b having an equal value of Poisson ratio as an elastic coefficient; and an electrically insulated needle 4 attached with a micro magnet 16 at the lower part being hanged from the fixing plate 2 by the 2 elastic bodies protected by 2 straw-like cylinders 3, wherein the position of the needle is measured. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
