Measuring device for surface instability of magnetic liquids
A magnetic liquid and unstable technology, which is applied to measuring devices, uses permanent magnets for magnetic field measurement, material magnetic variables, etc., can solve the problem that the detection device cannot adjust the distance between the permanent magnet and the magnetic liquid, and affects the accuracy of the measurement data, etc. To achieve the effect of easy observation and improved accuracy
Active Publication Date: 2021-08-27
TSINGHUA UNIV
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Problems solved by technology
[0003] However, in the related art, the surface instability detection device of the magnetic liquid cannot adjust the distance between the permanent magnet and the magnetic liquid, which affects the accuracy of the measurement data
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[0026] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0027] Such as Figure 1 to Figure 3 As shown, the device for measuring surface instability of a magnetic liquid according to an embodiment of the present invention includes a support assembly 1 , a transparent container 2 , a tray 3 and a measurement assembly 5 .
[0028] The support assembly 1 includes a first support frame 11 and a measurement platform 12 , and the measurement platform 12 is arranged on the top of the first support frame 11 . Such as figure 1 and figure 2 As shown, the first supporting frame 11 can be vertically arranged on the ground along the up-down direction, and the measurement platform 12 extends horizontally and is arranged on the t...
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The invention discloses a measuring device for surface instability of a magnetic liquid. The measuring device includes a support assembly, a transparent container, a tray and a measurement assembly. The support assembly includes a first support frame and a measurement platform, and the measurement platform is arranged on the first support frame. The top of the top; the transparent container is set on the top of the measurement platform; the tray is set on the support assembly, and the permanent magnet is arranged on the tray; the measurement assembly includes an observation part, a moving part and a projection assembly, and the observation part includes a second support frame and an image collector. The second support is erected on the top of the measurement platform, the image collector is arranged on the second support frame, the image acquisition end of the image collector faces the transparent container, the moving part is connected with the tray, and the moving part is used to drive the tray to move, and the projection assembly includes a light source and the projection plate, the light source and the projection plate are arranged on the top of the measurement platform and set oppositely. The measuring device of the invention can adjust the distance between the permanent magnet and the magnetic liquid, and intuitively measure the surface instability of the magnetic liquid.
Description
technical field [0001] The invention belongs to the technical field of magnetic liquid detection, and in particular relates to a measuring device for surface instability of magnetic liquid. Background technique [0002] The magnetic liquid is a colloidal solution formed by stably dispersing nano-scale magnetic solid particles in a suitable base carrier liquid after being wrapped by a surfactant. When the permanent magnet gradually approaches the magnetic liquid, under the action of the non-uniform magnetic field on the surface of the permanent magnet, the interface of the magnetic liquid begins to fluctuate, forming a three-dimensional peak state, which is called the instability of the magnetic liquid. The surface instability of the magnetic liquid is characterized by the fact that as the distance between the permanent magnet and the magnetic liquid gradually shortens, the number of three-dimensional peaks generated gradually increases and the spacing gradually decreases. W...
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IPC IPC(8): G01N27/74G01N33/00G01R33/038
CPCG01N27/74G01N33/00G01R33/038
Inventor 李德才李泽鹏
Owner TSINGHUA UNIV