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Method and device for nondestructively testing material concentration

A technology for substance concentration and non-destructive testing, which is applied in the field of testing and can solve problems such as cumbersome operations

Inactive Publication Date: 2010-04-21
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation is very cumbersome

Method used

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  • Method and device for nondestructively testing material concentration
  • Method and device for nondestructively testing material concentration
  • Method and device for nondestructively testing material concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example one (detection device)

[0050] figure 1 A specific embodiment of the present invention is shown. The detection device can be used to detect the concentration of glucose in the aqueous humor of the human eye, the low-coherence interference method is used to detect the reflected light intensity information of the iris of the human eye, and the human eye chamber can be detected indirectly by analyzing the changes in the signal after the absorption of light by the aqueous humor of the eye under different wavelengths The glucose concentration of the water.

[0051] Such as figure 1 As shown, the detection device includes a light source assembly 1, a coupler 2, a reference mirror 3, an imaging lens 4, a sample 5 (anterior chamber of the human eye), a spectrometer 6 and a computer 9.

[0052] Using the detection device of this embodiment, the non-destructive optical detection method for obtaining the glucose concentration of human aqueous humor is realized as follows: the...

Embodiment 2

[0053] Embodiment 2 (detection device)

[0054] Figure 4 Another specific embodiment of the present invention is shown.

[0055] The difference between the detection device and the first embodiment is that the light beams emitted by the two light sources 1a and 1b with different wavelength bandwidths are focused into the optical fiber through the lens and then merged into the wavelength division multiplexer 7, and then passed through the dual wavelength coupler 2 The fiber optic head shoots out. One beam is directed to the reference mirror 3, and the other beam is focused on the iris through the imaging lens 4. Its backscattered light and the reflected light of the reference mirror interfere in the coupler 2, and the interference light passes through the beam splitter 8 and is respectively by the spectrometer 6a and 6b are received and processed by the computer 9 to obtain the glucose concentration. The center wavelengths of the light sources 1a and 1b are 1250nm and 1610nm.

Embodiment 3

[0056] Embodiment three (detection method)

[0057] The detection method of using the above detection device to obtain the concentration of glucose in the aqueous humor of the human eye is achieved by using a spectrometer to detect the signal intensity of the interference between the reflected reference light and the backscattered light of the human iris, and by analyzing the light at different wavelengths The change of the signal after the absorption of the aqueous humor in the eye can indirectly detect the glucose concentration of the human eye aqueous humor, and finally achieve the purpose of monitoring the human blood sugar.

[0058] The method for non-destructive detection of blood glucose concentration in this embodiment includes the following processes:

[0059] Test steps:

[0060] a. The incident beam is directed to the beam splitter, and the wavelength bandwidth of the incident beam includes the wavelength range where the aqueous humor of the human eye will absorb light [a, ...

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Abstract

The invention provides a method and a device for nondestructively testing material concentration by utilizing a spectral absorption method for measuring reflection intensity by optical interference. The optical interference method is applied to detect reflection signals after rays are transmitted to a material carrier, and glucose concentration of aqueous humor of a human body is indirectly detected according to signal change after the rays with different wavelengths are absorbed by the aqueous humor. The method can accurately measure the blood glucose concentration under the condition of not generating damage to the human body, can measure the concentration of other components in the aqueous humor, and has accurate results, quick and convenient detection process and convenient implementation.

Description

【Technical Field】 [0001] The invention relates to a detection method, in particular to a non-destructive detection method and device capable of accurately detecting substance concentration. 【Background technique】 [0002] Diabetes and its complications are a global disease that poses a fatal threat to human health. The blood glucose testing methods currently used in medicine that have passed the FDA certification are all destructive or micro-destructive testing methods. These methods require blood samples from veins or fingertips to be taken each time the skin is pierced, and the human body is tested by colorimetric measurement using test strips. The concentration of glucose in the blood. These methods are not only time-consuming, high cost, and risk of local infection, but also the trouble and pain of taking blood samples make it impossible for most people with diabetes to monitor their blood sugar levels multiple times a day according to theoretical requirements, which affects...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 何永红马辉
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV