Method for detecting solid density and densitometer using the method

A density, solid technology, applied in the direction of material analysis by measuring buoyancy, can solve the problems of high cost, complex circuit, large volume, etc., and achieve the effect of simple measurement, good linearity and high accuracy

Inactive Publication Date: 2009-04-01
王洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Its disadvantage is that the structure of the whole device is relatively complicated, the volume is large, and the circuit is complicated, and the cost is very high.
Moreover, this device is bulky, which is not conducive to carrying out outdoor operations such as geological exploration, archaeological analysis, identification work during jade mining, metal purity and true and false discrimination when purchasing materials.

Method used

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  • Method for detecting solid density and densitometer using the method

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Embodiment Construction

[0017] The basis of embodiment method is:

[0018] In water, because the buoyancy force experienced by objects with high density accounts for a small proportion of gravity, while the buoyancy force experienced by objects with low density accounts for a large proportion of gravity, such as the difference between the weight of gold in water and the weight in air is small , The difference between the weight of plastic in water and the weight in air is large.

[0019] Based on the above principles, we indirectly obtain information related to the density of an object by measuring the ratio of the weight of the object in water (wet weight) to the weight in the air (dry weight).

[0020] This principle can be understood with the following formula:

[0021] G 湿 / G 干 =(G 干 -F 浮力 ) / G 干 =(ρV-ρ 水 V) / ρV

[0022] =(ρ-1) / ρ

[0023] In the formula:

[0024] G 湿 The wet weight of the object (immersed in water) G 干 dry weight of an object (in air)

[0025] f 浮力 The buoya...

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Abstract

The invention discloses a method used for measuring the density of solid, comprising the steps as follows: the article is hung on a lever; the other force arm of the lever is acted on an electronic balance; the suspension point of the article is adjusted so as to lead the reading of the electronic balance to be 1; subsequently, the article is submerged in water; therefore, the obtained result is the ratio of the weight of the article in water and the weight of the article in air; the detection result is compared with the ratio of the weight of various materials in water and weight thereof in air calculated in advance, thus obtaining the density value of the article; as the weight of the article to be measured in air is not measured, the measurement is simpler; and a strain sensor is used for measuring the value by lever adjustment, thus having good linearity.

Description

technical field [0001] The present invention relates to electronic measuring instruments, especially improvements to solid density meters. Background technique [0002] At present, to measure the density of a solid, according to the formula: ρ=m / v, it is necessary to measure the mass and volume of the object, and then calculate the density of the object. [0003] Measuring quality is relatively simple, using a balance to weigh. [0004] To measure the volume, it is necessary to immerse the object in the water of the measuring cup, and subtract the rising value of the water level from the original water level value to obtain the volume. In this link, due to the surface tension of the water, the edge of the liquid surface is concave, which is not a clear line, so it is impossible to read accurately by visual inspection, resulting in errors. [0005] In the end, calculations are required, which is cumbersome. [0006] In order to overcome the above problems and make the meas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/08
Inventor 陶星辰王洋
Owner 王洋
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