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Multifunctional optical fiber optical grating sensing experiment instrument

A fiber grating and multi-functional technology, applied in the field of experimental instruments, can solve the problems of easy introduction of errors, inconvenient use, working principle of fiber grating and inability to demodulate the process, etc., to achieve the effect of reducing measurement errors and intuitive matching process

Inactive Publication Date: 2005-10-26
HUNAN UNIV OF SCI & TECH
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Problems solved by technology

However, the physical parameters disclosed in the application are single-point tests, which cannot meet the application of fiber grating sensing technology, such as the experimental teaching of distributed testing
It adopts separately packaged components, so the cost will not be low, and the displacement micrometer is manually read, which is easy to introduce errors and is not convenient to use.
In addition, the Chinese invention patent application with the publication number CN1494237A discloses the idea of ​​setting a connection point between two couplers that can be inserted into an adjustable filter. The price of this interpolation component is relatively high, and it is more suitable for automatic Quick test, it is this kind of automatic test that makes the working principle and demodulation process of fiber grating impossible to understand through manual and intuitive interaction, so it is not suitable for teaching equipment

Method used

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  • Multifunctional optical fiber optical grating sensing experiment instrument
  • Multifunctional optical fiber optical grating sensing experiment instrument
  • Multifunctional optical fiber optical grating sensing experiment instrument

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Embodiment Construction

[0031] As can be seen from the accompanying drawings, as shown in Fig. 1, Fig. 2, Fig. 3, a multifunctional fiber grating sensing experiment instrument comprises a box body 1, a broadband light source 2, a sensing unit 3, a demodulation unit 4, a data processing unit 5, The digital display unit 6 and the fiber coupling link connecting them form a system, the system is also provided with a light source interface 21 for introducing a broadband light source 2, the sensing unit 3 and the demodulation unit 4 are all provided with cantilever beams 31, 41, and the cantilever beams are 93×5×1.6mm steel belt, one end is fixed and the other end is free, the fixed end is connected to the support frame 11, the support frame 11 is fixedly connected to the box body 1, and the fiber grating sensor heads 32 and 42 are bonded at a distance At 10 mm from the fixed end of the cantilever beam, the tuning sensitivity is 0.2994 nm / nm, and the maximum tuning amount is 2.1 nm. The adjustable ejector r...

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Abstract

The invention is the multi-functional fiber raster sensing tester, which comprises the box, the light source interface bringing broad band source, the cantilever with the same fiber raster sensing head, the sensing unit, the adjusting unit, the data processing unit having the photoelectric detector, the multiway switch, the amplifying circuit, the filter circuit, the data collecting card and the data processing module, the data displaying unit having the displaying form and the displaying terminal and the fiber couple link. The invention overcomes the complicated adjusting method and high price of the instrument of the prior art and realizes the hand adjustment of the winding degree of the cantilever; a plurality of fiber raster be the important teaching content.

Description

technical field [0001] The invention relates to an experimental instrument, in particular to a multifunctional optical fiber grating sensing experimental instrument for teaching. Background technique [0002] The existing optical fiber grating sensing experiment instrument used for teaching can realize strain and temperature testing. The Chinese invention patent application with the publication number CN1605835A discloses the detection of parameters such as current, tilt angle, vibration and displacement, as well as the optical fiber light guide, optical fiber bending loss, and temperature detection experiments. However, the physical parameters disclosed in the application are single-point tests, which cannot meet the application of fiber grating sensing technology, such as the experimental teaching of distributed tests. It adopts separately packaged components, so the cost is not low, and the displacement micrometer is manually read, which is easy to introduce errors and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
Inventor 朱萍玉罗忠诚杨书仪肖冬明蒋玲莉张美阳
Owner HUNAN UNIV OF SCI & TECH
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