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Optical fiber carbon quantum dot pressure detection system

A technology of carbon quantum dots and detection systems, which can be used in the measurement of fluid pressure, the measurement of fluid pressure using optical methods, and the measurement of the change in optical properties of materials when they are stressed, which can solve the inconvenience of application and affect the output. Light detection and other issues, to achieve good application prospects, low detector requirements, simple data processing effect

Pending Publication Date: 2022-07-15
YUNNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In previous studies, the wavelength of the output light is the same as that of the input light, and the input light easily affects the detection of the output light, or a spectrometer is needed to distinguish the change of the incident light, which is inconvenient to use

Method used

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  • Optical fiber carbon quantum dot pressure detection system
  • Optical fiber carbon quantum dot pressure detection system
  • Optical fiber carbon quantum dot pressure detection system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The present invention provides an optical fiber carbon quantum dot pressure detection system, including a light source, a light detector, a first optical fiber 1 , a connecting part 2 , a second optical fiber 3 , a composite sensing material 4 , and a force receiving part 5 . One end of the first optical fiber 1 is connected to the light source. The light source is an ultraviolet light source, the light source emits ultraviolet light, and the ultraviolet light is coupled into the first optical fiber 1 . The first optical fiber 1 is an ultraviolet optical fiber, so that the ultraviolet light can propagate in the first optical fiber 1 and generate less loss. like figure 1 As shown, the other end of the first optical fiber 1 is connected to one end of the connecting part 2, the other end of the connecting part 2 is connected to one end of the second optical fiber 3, and the other end of the second optical fiber 3 is connected to the photodetector. The light detector incl...

Embodiment 2

[0032] On the basis of Example 1, as figure 2 As shown, the connecting portion 2 is V-shaped, the middle of the connecting portion 2 is low, the two sides of the connecting portion 2 are high, and the force-receiving portion 5 is placed on the upper side of the V-shape. In this way, more carbon quantum dots 44 can be arranged in the V-shaped groove, and these carbon quantum dots 44 generate stronger fluorescence. In particular, when pressure is applied on the force receiving portion 5, since the carbon quantum dots 44 move to the lower side of the V-shaped groove, the distance between the carbon quantum dots 44 changes more, thereby changing the center of the fluorescence emission more. wavelength, enabling more sensitive pressure detection. The force-receiving part 5 is arranged on the upper side of the V-shaped groove, and the area of ​​the force-receiving part 5 is larger than the top area of ​​the V-shaped groove, and the force-receiving part 5 confines the fluorescence ...

Embodiment 3

[0036] On the basis of Example 1, as image 3 As shown, the end of the connecting portion 2 connected with the first optical fiber 1 is high, and the end of the connecting portion connected with the second optical fiber 3 is low. That is, the cross-sectional area of ​​one end of the connecting portion 2 in contact with the first optical fiber 1 is large; the cross-sectional area of ​​the one end of the composite sensing material 4 in contact with the second optical fiber 3 is large. Such a design facilitates the propagation of more ultraviolet light to the connecting portion 2 , thereby exciting the carbon quantum dots 44 to generate stronger fluorescence, and also facilitates more coupling of the fluorescence generated by the carbon quantum dots 44 into the second optical fiber 3 .

[0037] Further, the bottom surface of the force receiving portion 5 is provided with a precious metal layer, the material of the precious metal is gold, and the thickness of the precious metal la...

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Abstract

The invention relates to the field of pressure detection, in particular to an optical fiber carbon quantum dot pressure detection system which comprises a light source, a light detector, a first optical fiber, a connecting part, a second optical fiber, a composite sensing material and a stress part. One end of the first optical fiber is connected with the light source, the other end of the first optical fiber is connected with one end of the connecting part, the other end of the connecting part is connected with one end of the second optical fiber, the other end of the second optical fiber is connected with the light detector, and the connecting part is lower than the first optical fiber and the second optical fiber; the stress part is arranged on the composite sensing material; the composite sensing material comprises an elastic material and carbon quantum dots, and the carbon quantum dots are doped in the elastic material. The to-be-detected pressure changes the intensity and the central wavelength of the fluorescence, and pressure detection is realized through the influence of the intensity or the central wavelength of the fluorescence. The method has the advantages of simple data processing, low requirement on a detector and the like, and has a good application prospect in the field of optical fiber pressure detection.

Description

technical field [0001] The invention relates to the field of pressure detection, in particular to an optical fiber carbon quantum dot pressure detection system. Background technique [0002] Pressure detection is to convert pressure into other physical quantities, and realize pressure detection through changes in other physical quantities. The spring scale learned in junior high school is to convert the pressure into the elongation of the spring. Common pressure detection is based on voltage or resistance changes in semiconductor materials. However, the sensitivity of pressure sensors based on voltage or resistance changes of semiconductor materials is not high enough to meet their needs in the high-tech field. [0003] The optical fiber sensor uses light as the information carrier and optical fiber as the information transmission medium to sensor or detect the measured physical quantity. Optical fiber sensors have the advantages of simple structure, small size, high reli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/24G01L11/02G01L19/00
CPCG01L1/24G01L1/242G01L11/02G01L11/025G01L19/00
Inventor 杨雯李佳保杨培志葛文周启航王琴
Owner YUNNAN NORMAL UNIV
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