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Method and device for detecting sugar content of liquid through light intensity, and application

A technology of light intensity detection and sugar content, which is applied in measuring devices, material analysis through optical means, and analysis through chemical reactions of materials, can solve the problems of high instrument price, low measurement accuracy, stability and precision. No advanced problems, to achieve the effect of convenient and simple measurement process, high measurement accuracy and fast measurement speed

Pending Publication Date: 2018-12-21
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former needs to take blood, which will bring pain to the patient and risk of infection; the latter is very inconvenient to use, and the results are subject to many interference factors, and the stability and accuracy are not high
[0003] At present, the methods for measuring the sugar content of liquid mainly include Abbe refractometer or refractometer, prism total reflection method, Brewster angle method, prism surface plasma coupling method, etc. Sugar content; in principle, it can be used to measure the sugar content of saliva, but some methods have low measurement accuracy, some methods are not easy to achieve fast measurement and the instrument price is high, so it is not suitable for home use

Method used

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  • Method and device for detecting sugar content of liquid through light intensity, and application
  • Method and device for detecting sugar content of liquid through light intensity, and application
  • Method and device for detecting sugar content of liquid through light intensity, and application

Examples

Experimental program
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Effect test

Embodiment 1

[0062] A device that detects the sugar content of a liquid by light intensity, such as figure 1 As shown, it includes a black card 16, a sealed jacket 8, and a quasi-monochromatic light source 1, a sample stage 3, a lens 4, a photodetector 5, an electrical signal processing circuit 6, a power supply circuit 7, and a temperature sensor probe arranged in the sealed jacket 8. 17. Lens 18, aperture 19, prism 20. Wherein, along the direction that the light beam advances, quasi-monochromatic light source 1, lens 18, diaphragm 19, prism 20, lens 4, light detector 5 are arranged sequentially; The circuit 6 is connected, and the photodetector 5 is connected with the electrical signal processing circuit 6; the black card 16 is connected with the prism 20 to form a sample coupling prism, which is arranged on the sample stage 3; the temperature sensor probe 17 is used to measure the temperature of the liquid sample, and is arranged on the The vicinity of the sample stage 3 is connected t...

Embodiment 2

[0065] A device that detects the sugar content of a liquid by light intensity, such as figure 2 As shown, it includes a black card 16, a sealed jacket 8 and a quasi-monochromatic light source 1, a sample stage 3, a lens 4, a photodetector 5, an electrical signal processing circuit 6, a power supply circuit 7, and a beam splitter 9 arranged in the sealed jacket 8 , Compensation light detector 10, temperature sensor probe 17, lens 18, aperture 19, cylindrical lens 21. Wherein, along the direction that the light beam advances, the quasi-monochromatic light source 1, lens 18, diaphragm 19, beam splitter 9, cylindrical lens 21, lens 4, photodetector 5 are arranged sequentially; The light source 1 is connected with the electrical signal processing circuit 6, and the photodetector 5 is connected with the electrical signal processing circuit 6; the black card 16 is connected with the cylindrical lens 21 to form a sample coupling prism, which is arranged on the sample stage 3; the tem...

Embodiment 3

[0069] A system for detecting the sugar content of liquid by light intensity, in addition to the device provided in embodiment 1 or embodiment 2, also includes such as image 3 The shown operation panel includes a switch button 11, a calibration button 12, a measurement button 13, a sample area 14, and a digital display screen 15; the switch button 11 is connected to the power circuit 7; the calibration button 12, the measurement button 13 and the digital display screen 15 are respectively It is connected with the electrical signal processing circuit 6; the sample area 14 is the place where the black card 16 is placed.

[0070] The operation panel is equipped with a calibration button function, and the use of sugar-free pure water can facilitate calibration and calibration to ensure measurement accuracy.

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Abstract

The invention discloses a method and a device for detecting the sugar content of a liquid through the light intensity, and an application. The method comprises the steps of enabling a beam of quasi-monochromatic quasi-parallel light to enter a prism from one side of the prism, so that the light comes to an interface between the bottom surface of the prism and the liquid in a direction approximateto a total reflection angle of water, and the totally reflected light is emitted from the other side of the prism and is detected by a light detector; detecting a to-be-detected liquid sample and a standard liquid sample according to the previous step; and establishing a standard curve, and determining the sugar content in the to-be-detected liquid sample through the standard curve. The device forrealizing the method comprises a black card and a light path system; and the light path system comprises a quasi-monochromatic light source, a sample table, a first lens, an optical detector, an electric signal processing circuit, a power circuit, a temperature sensor probe, a second lens, a diaphragm and a light reflection element. According to the method and the device, the measurement speed ishigh, real-time measurement can be realized, the process is simple, and the accuracy is high; and during measurement of body fluids such as saliva and the like, noninvasive sampling can be realized,so that infection and pain are avoided.

Description

technical field [0001] The invention belongs to the technical field of photoelectric precision measurement, in particular to a method, device and application for detecting the sugar content of liquid through light intensity. Background technique [0002] With the gradual improvement of people's living standards, our country has gradually entered the aging society. The number of diabetic patients is increasing, and the non-invasive and rapid detection of diabetes and the daily non-invasive and low-cost monitoring of the condition of diabetic patients are an urgent social problem. At present, the means of home diabetes detection mainly rely on blood glucose meters and urine sugar concentration measuring devices. The former requires blood collection, which will bring pain to the patient and risk infection; the latter is very inconvenient to use, and the results are subject to many interference factors, and the stability and accuracy are not high. [0003] At present, the meth...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N21/552
CPCG01N21/552G01N21/78
Inventor 黄佐华邓剑勋白芸王佶彭力
Owner SOUTH CHINA NORMAL UNIVERSITY
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