Device and method for testing density, concentration and thickness based on X-ray

A testing device, X-ray technology, applied in measuring device, specific gravity measurement, using wave/particle radiation, etc., can solve the problems of ray intensity fluctuation, reduced detection accuracy, stroboscopic phenomenon, etc., and achieve low potential danger and high-precision detection. , safe and reliable effect

Inactive Publication Date: 2009-11-25
ZHEJIANG UNIV
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The main technical obstacle for the application of X-rays in density and concentration detection is the poor stability of the X-ray source, and the so-called stroboscopic phenomenon, that is, the ray intensity fluctuates with time
When testing the density and concentration of solids and fluids, if the radiation intensity is unstable, the detection accuracy will be reduced

Method used

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  • Device and method for testing density, concentration and thickness based on X-ray

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the mensuration of coal-water slurry density in pipeline (density range 1-2.5)

[0030] 1) Install the X-ray generator and reference counting tube on one side of the coal-water slurry delivery pipeline, and the working counting tube on the opposite side. During installation, adjust the distance between the reference counting tube and the X-ray axis, and the working counting tube The distance from the X-ray source, so that the radiation intensity measured by the counter tube is within a reasonable range;

[0031] 2) Measure 2 to 5 samples with known densities before use, and calculate the relationship between the signal intensity ratio of the reference counter tube and the working counter tube and the density or concentration of the substance to be measured by the least square method;

[0032] 3) According to the ratio of signal strength of working counting tube / signal strength of reference counting tube and the relational formula obtained in the second ste...

Embodiment 2

[0033] Embodiment 2: the mensuration of syrup concentration

[0034] 1) Install the X-ray generator and the reference counting tube on one side of the syrup container, and the working counting tube on the opposite side. During installation, adjust the distance between the reference counting tube and the X-ray axis, and the distance between the working counting tube and the X-ray axis. The distance from the X-ray source, so that the ray intensity measured by the counter tube is within a reasonable range;

[0035] 2) Measure 2 to 5 syrup samples with known concentrations before use, and calculate the relationship between the signal intensity ratio of the reference counter tube and the working counter tube and the density or concentration of the substance to be measured by the least square method;

[0036] 3) According to the ratio of the signal intensity of the working counter tube to the signal intensity of the reference counter tube and the relational expression obtained in step...

Embodiment 3

[0037] Embodiment 3: the mensuration of cardboard thickness

[0038] 1) Install the X-ray generator and reference counting tube on one side of the cardboard, and the working counting tube on the opposite side. During installation, adjust the distance between the reference counting tube and the X-ray axis, as well as the working counting tube and the X-ray source distance, so that the ray intensity measured by the counter tube is within a reasonable range;

[0039] 2) Measure 2 to 5 cardboards with known thickness before use, and calculate the relationship between the signal intensity ratio of the reference counter tube and the working counter tube and the thickness of the cardboard to be tested by the least square method;

[0040] 3) According to the ratio of the signal strength of the working counting tube / the signal strength of the reference counting tube and the relational formula obtained in step 2), the thickness of the cardboard can be obtained.

[0041] The present inv...

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Abstract

The invention provides a device and method for testing density, concentration and thickness based on X-ray. It adopts a tester for density, concentration and thickness based on X-ray to measure the sample with known measured density, concentration and thickness. The relational expression between signal intensity ratio of the reference counter tube and the working counter tube and the density or concentration of the substance to the measured is calculated by least square method. When the density or concentration of the unknown substance is measured, the invention follows the relational expression with the signal intensity ratio of the reference counter tube and the working counter tube together. The invention is placed in two sides of the detected object, which is compactly structured, convenient to use, and capable of realizing on-line measurement; meanwhile, it is able to reach multiple purpose by one device with wide application range. The method of the invention is better than the method used by other apparatuses and devices for measuring density, concentration and thickness.

Description

technical field [0001] The invention relates to an X-ray-based testing device and method for density, concentration and thickness. Background technique [0002] X-rays have a strong ability to penetrate substances and are widely used in industries such as medical imaging, luggage security inspection and industrial flaw detection. The working principles of these instruments are the same, that is, after X-rays pass through the object to be inspected, the X-rays absorbed and lost by the object are related to its density or concentration, and after imaging and display, a gray or color image that can reflect the density of the object to be inspected is obtained. [0003] The existing commercial density and concentration scanners basically use neutron sources, that is, gamma ray sources, which are radioactive isotopes of metal elements such as cobalt and cesium. The gamma ray source continuously emits gamma rays with a very stable intensity and is not disturbed by external condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/24G01B15/02
Inventor 叶瑛刘利光秦华伟夏枚生潘依雯
Owner ZHEJIANG UNIV
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