Method and device for Halbach array magnetic levitation density measurement

Abstract

A Halbach array magnetic levitation density measurement method, the substance to be tested is placed in a container containing a paramagnetic solution and the surface of the substance to be tested is guaranteed to be free of air bubbles, then the container is placed in an active magnetic field, and the distance between the magnetic fields is adjusted to make the substance to be tested The substance is stably suspended in the container, the vertical height of the suspended position from the bottom surface under the magnetic field is determined and converted to obtain the density of the substance to be tested, and the measurement is repeated many times without changing the concentration of the paramagnetic solution to verify the result. The invention adopts the Halbach array to increase the magnetic field gradient while increasing the near-linear magnetic field interval, thereby expanding the density range of the object to be detected; the measuring device is flexible and adjustable, and can perform multiple measurements to improve the accuracy and reliability of the result.

Description

Technical field [0001] The present invention relates to a technique for measuring metering, and is specifically a method and apparatus for a Haierbeck array magnetic suspension density measurement. Background technique [0002] Accurate measurement density has important significance for the characterization of physics, chemical changes, and material properties, as well as biological disease testing. Most of the existing density measuring devices perform density measurement for specific solid state or liquid substances, for the measurement of liquid density, the balance, specific gravity or density bottle method, these methods require manual operation, labor cost, and time cost, and measure As a result, there is an impact of human factors; the measurement of solid density mainly uses density gradient gauge, microchannel resonance method or microwave technology measurement method, which is complex and cumbersome, and the measurement response time is long; the measurement is low; fo...

AI Technical Summary

Problems solved by technology

Most of the existing density measuring devices measure the density of specific solid or liquid substances. For the measurement of liquid density, most of them use balance weighing, hydrometer or density bottle method. These methods need to be completed manually, which consume manpower and time. The results are influenced by human factors; the measurement of solid density mainly adopts the density gradient meter method, microchannel resonance method or microwave technology measurement method, these methods are complex and cumbersome to operate, the measurement response time is long, and the measurement efficiency is low; Substances and biological materials that need to be used in a non-contact manner to avoid damage or contamination, resulting in measurement difficulties

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