| 摘要 |
<p>The invention relates to an apparatus for the analysis of the dynamic behaviour of ferro-fluids, ferromagnetic colloidal solutions and magneto-active powders placed in a rotating magnetic field of a variable rotation frequency. According to the invention, the apparatus consists of a cylindrical container () having a flat bottom () where, at the outer part there is mounted a plane mirror () and on the circular external outline there is placed a light source () made of several flat LEDs and supplied from a battery () located inside a seat () cut into a circular support piece () where there are also located a tilting mirror () with two faces, i.e. a plane face and a concave face, a high-speed video camera (), associated with an adjustable system () and an optical system () comprising one or more lenses, on the bottom of the same container (), which is under the action of a magnetic field produced by two magnets () located on the outline of a ferromagnetic yoke (), there is also placed a glass vessel () containing the substance to be analyzed, the so formed assembly being placed onto the shaft of a D.C. motor () mounted in a vertical position and supplied from a D.C. source () by means of a control rheostat ().</p> |
