CN220649845U - Double-arm type pressure sensing device based on fiber bragg grating demodulation - Google Patents
Double-arm type pressure sensing device based on fiber bragg grating demodulation Download PDFInfo
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- CN220649845U CN220649845U CN202322444554.8U CN202322444554U CN220649845U CN 220649845 U CN220649845 U CN 220649845U CN 202322444554 U CN202322444554 U CN 202322444554U CN 220649845 U CN220649845 U CN 220649845U
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- 239000002184 metal Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 4
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- 239000011888 foil Substances 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model provides a double-arm pressure sensing device based on fiber bragg grating demodulation, and belongs to the technical field of double-arm pressure sensing devices; the technical problems to be solved are as follows: the structure improvement of the double-arm pressure sensing device based on fiber bragg grating demodulation is provided; the technical scheme adopted for solving the technical problems is as follows: the outer surface of the protective shell is provided with a protective sleeve, and the top of the protective shell is provided with a cover plate; a metal plate is vertically arranged in the center of the lower surface of the cover plate, the metal plate is hinged with one end of a sliding rod through a bolt, the other end of the sliding rod is hinged with a fixed block, the fixed block is arranged on a sliding tube, and the sliding tube is sleeved on a fixed rod which is horizontally arranged, so that the sliding tube can slide left and right on the fixed rod; both ends of the fixed rod are fixedly arranged on the side wall of the protective shell; the fixed rod is also provided with a strain fiber grating and a temperature compensation fiber grating; the utility model is applied to gas-liquid pressure detection.
Description
Technical Field
The utility model provides a double-arm type pressure sensing device based on fiber bragg grating demodulation, and belongs to the technical field of double-arm type pressure sensing devices.
Background
The gas or liquid detection device that uses at present mostly makes inside elasticity sensing element change in shape through the change of pressure to drive pointer or electron foil gage and take place corresponding change and catch pressure numerical value, however traditional pointer type pressure sensor only can roughly take the reading, does not possess functions such as online real-time supervision and warning, and elasticity sensing element belongs to single sensor as electron foil gage simultaneously, uses the networking to use comparatively complicated, and this type sensor is in flammable and explosive, the easy malfunction in the service environment such as electromagnetic interference is strong, leads to detecting accuracy precision lower, uses difficulty.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and solves the technical problems that: an improvement of a double-arm pressure sensing device structure based on fiber bragg grating demodulation is provided.
In order to solve the technical problems, the utility model adopts the following technical scheme: the double-arm pressure sensing device based on fiber bragg grating demodulation comprises a protective casing, wherein a protective sleeve is arranged on the outer surface of the protective casing, and a cover plate is arranged on the top of the protective casing;
the central position of the lower surface of the cover plate is vertically provided with a metal plate, the metal plate is hinged with one end of a sliding rod through a bolt, the other end of the sliding rod is hinged with a fixed block, the fixed block is arranged on a sliding tube, and the sliding tube is sleeved on a fixed rod which is horizontally arranged, so that the sliding tube can slide left and right on the fixed rod;
the two ends of the fixed rod are fixedly arranged on the side wall of the protective shell;
the fixed rod is also provided with a strain fiber grating and a temperature compensation fiber grating.
The number of the fixing rods is two, and the fixing rods are specifically arranged in the protective shell in a crossing mode.
The number of the sliding pipes is four, the sliding pipes are symmetrically arranged on the fixed rod, metal elastic elements are connected between the fixed blocks arranged on the sliding pipes, and the metal elastic elements are arranged above the strain fiber gratings and the temperature compensation fiber gratings.
Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a double-arm fiber grating demodulation system for pressure sensing, which can solve the problem of reduced precision of a single fiber grating due to factors such as inclination, poor stability and the like on the basis of overcoming severe use environments, and improves the precision and practicability of detecting gas-liquid pressure of a fiber grating pressure sensor.
Drawings
The utility model is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of the structure of the present utility model;
in the figure: 1 is a metal plate, 2 is a slide bar, 3 is a cover plate, 4 is a protective shell, 5 is a fixed block, 6 is a protective sleeve, 7 is a strain fiber grating, 8 is a temperature compensation fiber grating, 9 is a slide tube, and 10 is a fixed rod.
Detailed Description
As shown in fig. 1, the utility model provides a gas-liquid pressure detection device based on fiber bragg grating sensing, which comprises a protective casing 4, wherein a protective sleeve 6 is arranged on the outer surface of the protective casing 4, and a cover plate 3 is arranged on the top of the protective casing 4;
the metal plate 1 is vertically arranged in the center of the lower surface of the cover plate 3, the metal plate 1 is hinged with one end of the sliding rod 2 through a bolt, the other end of the sliding rod 2 is hinged with the fixed block 5, the fixed block 5 is arranged on the sliding tube 9, and the sliding tube 9 is sleeved on the fixed rod 10 which is horizontally arranged, so that the sliding tube 9 can slide left and right on the fixed rod 10;
both ends of the fixing rod 10 are fixedly arranged on the side wall of the protective shell 4;
the fixed rod 10 is also provided with a strain fiber grating 7 and a temperature compensation fiber grating 8.
The number of the fixing rods 10 is two, and the fixing rods are specifically arranged inside the protective shell 4 in a crossing way.
The number of the sliding pipes 9 is four, each sliding pipe 9 is symmetrically arranged on the fixing rod 10, metal elastic elements are connected between the fixing blocks 5 arranged on each sliding pipe 9, and the metal elastic elements are arranged above the strain fiber gratings 7 and the temperature compensation fiber gratings 8.
The utility model provides a device for detecting gas-liquid pressure, in particular to a double-arm fiber grating demodulation detection device through pressure sensing.
The fiber grating sensor adopted by the utility model is an optical passive device, the function of the fiber grating sensor is equivalent to that of forming a narrow-band filter in a fiber core, when a certain specific wavelength in an input signal meets the Bragg condition, the other wavelengths are transmitted, and the central wavelength value of the fiber grating can be obtained by measuring the reflected signal; the fiber bragg grating sensor has the advantages of corrosion resistance, strong electromagnetic interference resistance, intrinsic safety, easiness in networking and the like, and the fiber bragg grating sensor measures wavelength codes, so that the fiber bragg grating sensor is less influenced by light intensity fluctuation and the polarization state of light, has extremely strong anti-interference capability, and has advantages in certain special application environments.
When the pressure is measured, the fiber bragg grating sensor is arranged in a mechanical structure capable of converting the pressure into strain or displacement, and when the pressure is changed, the strain is changed due to the change of the mechanical structure, so that the central wavelength of the fiber bragg grating is changed; and the fiber bragg grating has extremely strong anti-interference capability, so that the remote measurement can be performed.
The specific structure of the utility model needs to be described that the connection relation between the component modules adopted by the utility model is definite and realizable, and besides the specific description in the embodiment, the specific connection relation can bring about corresponding technical effects, and on the premise of not depending on execution of corresponding software programs, the technical problems of the utility model are solved, the types of the components, the modules and the specific components, the connection modes of the components and the expected technical effects brought by the technical characteristics are clear, complete and realizable, and the conventional use method and the expected technical effects brought by the technical characteristics are all disclosed in patents, journal papers, technical manuals, technical dictionaries and textbooks which can be acquired by a person in the field before the application date, or the prior art such as conventional technology, common knowledge in the field, and the like, so that the provided technical scheme is clear, complete and the corresponding entity products can be reproduced or obtained according to the technical means.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (3)
1. Double-arm pressure sensing device based on fiber bragg grating demodulation, including protecting sheathing (4), its characterized in that: the outer surface of the protective shell (4) is provided with a protective sleeve (6), and the top of the protective shell (4) is provided with a cover plate (3);
the metal plate (1) is vertically arranged in the center of the lower surface of the cover plate (3), the metal plate (1) is hinged with one end of the sliding rod (2) through a bolt, the other end of the sliding rod (2) is hinged with the fixed block (5), the fixed block (5) is arranged on the sliding tube (9), and the sliding tube (9) is sleeved on a fixed rod (10) which is horizontally arranged, so that the sliding tube (9) can slide left and right on the fixed rod (10);
both ends of the fixed rod (10) are fixedly arranged on the side wall of the protective shell (4);
the fixed rod (10) is also provided with a strain fiber grating (7) and a temperature compensation fiber grating (8).
2. The dual-arm pressure sensing device based on fiber bragg grating demodulation as claimed in claim 1, wherein: the number of the fixing rods (10) is two, and the fixing rods are specifically arranged in the protective shell (4) in a crossing mode.
3. The dual-arm pressure sensing device based on fiber bragg grating demodulation as claimed in claim 2, wherein: the number of the sliding pipes (9) is four, each sliding pipe (9) is symmetrically arranged on the fixing rod (10), metal elastic elements are connected between the fixing blocks (5) arranged on each sliding pipe (9), and the metal elastic elements are arranged above the strain fiber gratings (7) and the temperature compensation fiber gratings (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322444554.8U CN220649845U (en) | 2023-09-08 | 2023-09-08 | Double-arm type pressure sensing device based on fiber bragg grating demodulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322444554.8U CN220649845U (en) | 2023-09-08 | 2023-09-08 | Double-arm type pressure sensing device based on fiber bragg grating demodulation |
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| Publication Number | Publication Date |
|---|---|
| CN220649845U true CN220649845U (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322444554.8U Active CN220649845U (en) | 2023-09-08 | 2023-09-08 | Double-arm type pressure sensing device based on fiber bragg grating demodulation |
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| Country | Link |
|---|---|
| CN (1) | CN220649845U (en) |
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2023
- 2023-09-08 CN CN202322444554.8U patent/CN220649845U/en active Active
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