Optical fiber dissolved oxygen sensing head and preparing method thereof

A sensor head and dissolved oxygen technology, which is applied in the direction of material analysis, instruments, and measuring devices through optical means, can solve the problems of single shape of the sensor head, few fluorescent signals, and low coupling efficiency, so as not to be easily disturbed by the external environment , low price, high sensitivity effect

Inactive Publication Date: 2008-03-05
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Its disadvantage is that the structure is more complicated, and Y branch optical fiber is required;
[0004] (2) Directly coat the sensitive material on the end face of the silica fiber [see Document 2: A.Campbell, D.Uttamchandani, Optical dissolved oxygen lifetime sensorbased on sol-gel immobilization. IEE Proc.-Sci. Meas.Technol.2004, 151(4):291], but requires a complex optical system to receive light;
[0005] (3) Directly apply the sensitive material to the side of the silica fiber [see literature 3: Brian D.MacCraith, Gerard O'Keeffe, Aisling K.McEvoy, Colette M.McDonagh, Ligh

Method used

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  • Optical fiber dissolved oxygen sensing head and preparing method thereof
  • Optical fiber dissolved oxygen sensing head and preparing method thereof
  • Optical fiber dissolved oxygen sensing head and preparing method thereof

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with embodiment.

[0038] First please refer to Fig. 1, Fig. 1 is the structural representation of the optical fiber dissolved oxygen sensing head of the present invention, as can be seen from the figure, the structure of the optical fiber dissolved oxygen sensing head of the present invention is made of plastic optical fiber, and the shape of the sensing head has U Shape, biconical, biconical + U-shaped and filament-shaped, respectively see Figure 1-1, 1-2, 1-3, 1-4, the outer wall of the optical fiber of the sensing head is coated with sensitive materials.

[0039] The plastic optical fiber is polymethyl methacrylate plastic optical fiber.

[0040] The sensitive material is a sol-gel containing fluorescent substances.

[0041] The preparation methods of these optical fiber dissolved oxygen sensor heads are described respectively below.

[0042] The practice of U-shaped sensor head:

[0043] First ...

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Abstract

The sensing head is made of plastic optical fiber-polymethyl methacrylate; said sensing head is U-shaped, biconical, biconical + U-shaped, or filament-shaped; on the sensing head the sensitized material is coated. The preparing method is: using the knife to cut off certain length sleeve of the plastic optical fiber; using the alcohol cotton ball to clean up the optical fiber; using the optical fiber to make an optical sensing head in any shapes; putting the optical sensing head into the sol-gel solution; using the crystal pulling method to coat a layer of sensitized material; drying the sensing head in room temperature.

Description

technical field [0001] The invention relates to an optical fiber dissolved oxygen sensor, in particular to an optical fiber dissolved oxygen sensor head for the optical fiber dissolved oxygen sensor and a preparation method thereof. Background technique [0002] Dissolved Oxygen (DO) refers to the dissolved oxygen in water, which is the source of oxygen for animals, plants and microorganisms growing in water. The determination of dissolved oxygen concentration in water is widely used in medical treatment, clinical medicine, industrial treatment, Environmental monitoring and other fields are of great significance, especially in water quality monitoring and water treatment, dissolved oxygen is an important control index, and it is also the most important investigation parameter in water environmental protection, aquaculture and marine science. Optical fiber dissolved oxygen sensor is mainly composed of light source, sensing head, detector and some peripheral circuits. The cur...

Claims

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Application Information

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IPC IPC(8): G01N21/00
Inventor 初凤红蔡海文耿健新方祖捷
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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