Density measuring method based on magnetic Archimedes principle

A technology of density measurement and principle, applied in the direction of measuring devices, specific gravity measurement, instruments, etc., can solve the problems of small size sample application development limitations, low sensitivity of small size samples, cumbersome operation and calculation methods, etc., to achieve easy automation, easy Observational, low-cost effects

Active Publication Date: 2017-04-19
ZHEJIANG UNIV
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Problems solved by technology

[0007] For the Archimedes principle and its derivative methods, it is usually difficult to measure the density to achieve higher precision. The existing density detection method, to achieve high-precision measurement, usually requires the use of expensive measuring equipment
Moreover, the measurement method based on Archimedes' principle is usually not sensit

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  • Density measuring method based on magnetic Archimedes principle
  • Density measuring method based on magnetic Archimedes principle
  • Density measuring method based on magnetic Archimedes principle

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Embodiment Construction

[0056]In order to make the present invention more clearly understood, the present invention will be further described below according to specific examples and accompanying drawings of the present invention.

[0057] Such as figure 1 Shown is the principle diagram of the magnetic levitation device of the present invention, including a magnet 1, a magnet 4, a medium solution 2, a sample 3, and a medium solution container 5. The container 5 is required to be transparent and easy to measure the height of the internal sample. The distance between magnet 1 and magnet 4 is d. The suspension height of the tested sample 3 in the solution is Z.

[0058] In this embodiment, magnet 1 and magnet 4 are square magnets with a length of 50mm*width of 50mm*height of 25mm, and magnets with a magnetic induction intensity of 0.425T on the center surface, which are formed with opposite poles at a distance of 45mm.

[0059] The present invention has a surface magnetic induction intensity of 0.425...

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Abstract

The invention discloses a density measuring method based on magnetic Archimedes principle, comprising the following steps: (1) a medium solution is determined according to the material of a sample, and the medium solution is a paramagnetic medium aqueous-solution; (2) the sample is placed into the medium solution; (3) the medium solution is placed into a magnetic suspension detector, which has two homopolar opposite square magnets; (4) suspension height of the detected sample is measured; and (5) density of the sample is calculated. In comparison with the prior art, the invention has the following beneficial effects: the device in demand is simple to operate; cost is low; measurement results are easy to observe; measurement accuracy is high; and automation is easy to realize.

Description

technical field [0001] The invention relates to a density detection method, in particular to a density measurement method based on the magnetic Archimedes principle. Background technique [0002] Density is one of the most basic and important physical characteristics of matter, and the density of different substances is generally different. At the same time, different internal microstructures and material compositions will also be reflected in changes in density at the macro level. The measurement of density is of great significance in scientific research, production process and life. [0003] Density is defined as the amount of matter per unit volume. The buoyancy principle discovered by Archimedes 2200 years ago is the basic principle of most existing density measurements. Different density measurement methods are based on the basic calculation formula of density: ρ=M / V. [0004] Commonly used measurement methods are buoyancy method, pycnometer method, density meter me...

Claims

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Application Information

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IPC IPC(8): G01N9/00
CPCG01N9/00
Inventor 赵朋颉俊张承谦傅建中
Owner ZHEJIANG UNIV
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