Method for measuring glucose concentration on basis of long period fiber grating temperature and glucose concentration two-parameter sensor

Abstract

The invention provides a long period fiber grating temperature and glucose concentration two-parameter sensor. According to the characteristic that a long period fiber grating is extremely sensitive for external environment refractive index, the femtosecond write-through long period fiber grating is adopted, the sensor is of a grating structure with different sensitivity for glucose concentrationand a cavity structure by strictly controlling the grating parameter of the sensor, when a broadband light source enters into the long period fiber grating, two obvious attenuation peaks exist in a transmission spectrum, when the concentration or temperature changes, two characteristic wavelengths are of different offsets, and the relationships between the resonant wavelength of the long period fiber grating and the temperature as well as between the resonant wavelength of the cavity structure and the concentration of a solution to be measured are calculated respectively, so that an equation set is formed, namely, the glucose concentration and temperature can be measured simultaneously.

Description

technical field [0001] The invention relates to biomedical detection technology, in particular to a method for measuring glucose concentration based on long-period optical fiber grating temperature and glucose concentration dual-parameter sensing. Background technique [0002] In daily life, obtaining the content information of glucose is of great significance to the judgment of the health level of the human body and the prevention of diseases. Blood sugar is the main substance that provides energy to the human body. The detection of blood sugar concentration in the human body is very important in the clinical detection of biomedicine, because both high and low blood sugar reflect problems in human metabolism. Glucose is an indispensable nutrient for the metabolism of living organisms. The heat released by its oxidation reaction is an important source of energy for human life activities. It can be used directly in the food and pharmaceutical industries. It can be used as a...

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Problems solved by technology

[0004] However, the above detection methods only measure a single parameter of concentration or refractive index, ignoring the influence of temperature on fiber gratings. Both FBG and long-period gratings are very sensitive to temperature. If the influence of temperature is not considered, then There will be a large error in the experimental results

[0005] At the same time, the above methods need polishing, coating and modification, the process is complicated and difficult, the economic cost is high, it is difficult to promote, and it cannot be commercialized

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