CN207923341U - A kind of fiber grating air pressure sensor - Google Patents
A kind of fiber grating air pressure sensor Download PDFInfo
- Publication number
- CN207923341U CN207923341U CN201820433208.6U CN201820433208U CN207923341U CN 207923341 U CN207923341 U CN 207923341U CN 201820433208 U CN201820433208 U CN 201820433208U CN 207923341 U CN207923341 U CN 207923341U
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- CN
- China
- Prior art keywords
- air pressure
- frame
- fiber grating
- lower frame
- temp probe
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Abstract
The utility model discloses a kind of fiber grating air pressure sensors, including protecting shell, fiber grating, air pressure diaphragm and wideband light source, the protection enclosure is equipped with a cavity, the protection shell is divided into frame and lower frame, it is clamped with air pressure diaphragm between the lower face of the upper frame and the upper surface of lower frame, the both sides of the upper frame and lower frame are equipped with a fixing piece, the fiber grating is pasted onto the lower face of the air pressure diaphragm, it is provided with air intake on the upper frame, the side of the lower frame is equipped with the wideband light source, it is additionally provided with an air gauge at the air intake of the upper frame, it is additionally provided with a heat insulation module in the protection shell.The atmospheric pressure value that the utility model measures is more accurate.
Description
Technical field
The utility model is related to a kind of baroceptor, specially a kind of fiber grating air pressure sensor.
Background technology
Currently, the sensor technology based on fiber bragg grating (FBG) principle is rapidly developed, fiber grating has
The advantages that preventing electromagnetic interference, non-electric detection, anti-lightning, fiber grating air pressure sensor measure as pipeline gas pressure,
It is applied in lower level measuring, ground hole water level monitoring and other industrial fluids pressure measurements.Due to field engineering ring
Border is complicated, and when encountering bad weather, structure temperature variation is fast, it is desirable that baroceptor must have good heat conductivity and energy
Real-time temperature compensation, to eliminate influence of the temperature change to pressure measurement.
Utility model content
The purpose of this utility model is to provide a kind of fiber grating air pressure sensors, to solve to carry in above-mentioned background technology
The problem of going out.
To achieve the above object, the utility model provides the following technical solutions：A kind of fiber grating air pressure sensor, including
Protect shell, fiber grating, air pressure diaphragm and wideband light source, the protection enclosure is equipped with a cavity, outside the protection
Shell is divided into frame and lower frame, and air pressure diaphragm is clamped between the lower face of the upper frame and the upper surface of lower frame,
The both sides of the upper frame and lower frame are equipped with a fixing piece, and the fiber grating is pasted onto the lower end of the air pressure diaphragm
Face, air intake is provided on the upper frame, and the side of the lower frame is equipped with the wideband light source, the air of the upper frame
Inlet is additionally provided with an air gauge, is additionally provided with a heat insulation module in the protection shell, the heat insulation module includes temp probe
One, temp probe two, heat preservation inner cavity and heating wire；Being internally provided with for the lower frame keeps the temperature inner cavity, intracavitary in the heat preservation
Filled with heat preservation liquid, the heat preservation inner cavity is additionally provided with a heating wire, and one end of the temp probe one extends to the lower frame
Inside, the other end of the temp probe one extends to the heat preservation inner cavity, and the inside of the upper frame also is provided with institute
Temp probe two is stated, the temp probe one and temp probe two are connected to the power-on switch of the heating wire, the lower frame
Bottom be equipped with a stand-by power supply, the power-on switch of the heating wire is connected to the stand-by power supply.
Preferably, the contact surface of the air pressure diaphragm and the upper frame and lower frame is coated with 353ND glue, in blocking
The air circulation of frame and lower frame.
Preferably, the material used in the upper frame and lower frame is stainless steel material.
Preferably, the material used in the air pressure diaphragm be copper sheet, elasticity modulus 119Gpa, thickness 0.96mm, directly
Diameter is 55.8mm.
Preferably, the protection shell is internally provided with a heat insulation coating, the heat insulation coating include base, PU coatings,
Ceramic fiber particle, thermal insulating filling layer, flame retardant coating, top coat layer；The surface of the base is provided with PU coatings, PU coatings
Upper surface is provided with thermal insulating filling layer, and ceramic fiber particle is provided in thermal insulating filling layer；The upper table of the thermal insulating filling layer
Face is provided with flame retardant coating, and the upper surface of flame retardant coating is provided with top coat layer.
Compared with prior art, the utility model has the beneficial effects that：Air pressure diaphragm is the sensing element of air pressure change.Gas
When buckling, since diaphragm both side surface is there are draught head, air pressure diaphragm will produce deformation.Fiber grating is pasted onto air pressure diaphragm
Lower surface, as air pressure diaphragm deformation makes fiber grating resonance peak amplitude change therewith, so that atmospheric pressure value be changed
Amount is converted into the resonance peak amplitude variable quantity of fiber grating, and is shown by air gauge, and the utility model is in upper frame
With heat insulation module is provided in lower frame, avoid influence of the mutation to pressure measurement due to temperature when measuring.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of the heat insulation coating of the utility model.
In figure：1, upper frame；2, lower frame；3, air pressure diaphragm；4, air intake；5, air gauge；6, fiber grating；7, wide
Band light source；8, temp probe one；9, temp probe two；10, inner cavity is kept the temperature；11, heating wire；12, stand-by power supply；13, base；
14, PU coatings；15, thermal insulating filling is layer by layer；16, flame retardant coating；17, top coat layer.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, a kind of embodiment provided by the utility model：
A kind of fiber grating air pressure sensor, including protection shell, fiber grating 6, air pressure diaphragm 3 and wideband light source 7,
The protection enclosure is equipped with a cavity, and the protection shell is divided into frame 1 and lower frame 2, the lower end of the upper frame 1
It is clamped with air pressure diaphragm 3 between face and the upper surface of lower frame 2, it is solid that the both sides of the upper frame 1 and lower frame 2 are equipped with one
Determine part, the fiber grating 6 is pasted onto the lower face of the air pressure diaphragm 3, and air intake 4 is provided on the upper frame 1, described
The side of lower frame 2 is equipped with the wideband light source 7, and an air gauge 5, the guarantor are additionally provided at the air intake of the upper frame 1
Be additionally provided with a heat insulation module in shield shell, the heat insulation module include temp probe 1, temp probe 29, heat preservation inner cavity 10 with
And heating wire 11；The lower frame 2 is internally provided with heat preservation inner cavity 10, and heat preservation liquid is filled in the heat preservation inner cavity 10, described
Heat preservation inner cavity 10 is additionally provided with a heating wire 11, and one end of the temp probe 1 extends to the inside of the lower frame 2, described
The other end of temp probe 1 extends to inside the heat preservation inner cavity 10, and the upper frame 1 is internally provided with the temp probe
29, the temp probe 1 and temp probe 29 are connected to the power-on switch of the heating wire 11, the bottom of the lower frame 2
Portion is equipped with a stand-by power supply 12, and the power-on switch of the heating wire 11 is connected to the stand-by power supply 12.
In the present embodiment, the air pressure diaphragm 3 and the contact surface of the upper frame 1 and lower frame 2 are coated with 353ND
Glue, the air circulation of frame 1 and lower frame 2 in blocking.
In the present embodiment, the material used in the upper frame 1 and lower frame 2 is stainless steel material.
In the present embodiment, the material used in the air pressure diaphragm 3 is copper sheet, and elasticity modulus 119Gpa, thickness is
0.96mm, a diameter of 55.8mm.
In the present embodiment, the protection shell is internally provided with a heat insulation coating, the heat insulation coating include base 13,
PU coatings 14, ceramic fiber particle, thermal insulating filling layer 15, flame retardant coating 16, top coat layer 17；The surface of the base 13 is arranged
There are PU coatings 14, the upper surface of PU coatings 14 to be provided with thermal insulating filling layer 15, ceramic fibre is provided in thermal insulating filling layer 15
Grain；The upper surface of the thermal insulating filling layer 15 is provided with flame retardant coating 16, and the upper surface of flame retardant coating 16 is provided with top coat layer
17。
Operation principle：Air pressure diaphragm is the sensing element of air pressure change.When air pressure change, due to 3 both sides table of air pressure diaphragm
There are draught head, air pressure diaphragms 3 will produce deformation in face.Fiber grating 6 is pasted onto the lower surface of air pressure diaphragm 3, with air pressure film
Piece 3 deforms so that 6 resonance peak amplitude of fiber grating changes therewith, to convert atmospheric pressure value variable quantity to fiber grating
Resonance peak amplitude variable quantity, and shown by air gauge 5, the utility model is provided in upper frame 1 and lower frame 2
Heat insulation module avoids influence of the mutation when measuring due to temperature to pressure measurement.
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art is come
Say, still can with technical scheme described in the above embodiments is modified, or to which part technical characteristic into
Row equivalent replacement, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all
It is included within the scope of protection of this utility model.
Claims (5)
1. a kind of fiber grating air pressure sensor, it is characterised in that：Including protection shell, fiber grating (6), air pressure diaphragm (3)
And wideband light source (7), the protection enclosure are equipped with a cavity, the protection shell is divided into frame (1) and lower frame
(2), air pressure diaphragm (3), the upper ledge are clamped between the lower face of the upper frame (1) and the upper surface of lower frame (2)
The both sides of frame (1) and lower frame (2) are equipped with a fixing piece, and the fiber grating (6) is pasted onto under the air pressure diaphragm (3)
End face, air intake (4) is provided on the upper frame (1), and the side of the lower frame (2) is equipped with the wideband light source (7), institute
It states and is additionally provided with an air gauge (5) at the air intake of frame (1), a heat insulation module is additionally provided in the protection shell, it is described
Heat insulation module includes temp probe one (8), temp probe two (9), heat preservation inner cavity (10) and heating wire (11)；The lower frame
(2) be internally provided with keeps the temperature inner cavity (10), is also set filled with heat preservation liquid, the heat preservation inner cavity (10) in the heat preservation inner cavity (10)
There are a heating wire (11), one end of the temp probe one (8) to extend to the inside of the lower frame (2), the temp probe
The other end of one (8) extends to heat preservation inner cavity (10) inside, and the upper frame (1) is internally provided with the temp probe two
(9), the temp probe one (8) and temp probe two (9) are connected to the power-on switch of the heating wire (11), the lower frame
(2) bottom is equipped with a stand-by power supply (12), and the power-on switch of the heating wire (11) is connected to the stand-by power supply (12).
2. a kind of fiber grating air pressure sensor according to claim 1, it is characterised in that：The air pressure diaphragm (3) with
The contact surface of the upper frame (1) and lower frame (2) is coated with 353ND glue, the sky of frame (1) and lower frame (2) in blocking
Air-flow is logical.
3. a kind of fiber grating air pressure sensor according to claim 1, it is characterised in that：The upper frame (1) and under
Material used in frame (2) is stainless steel material.
4. a kind of fiber grating air pressure sensor according to claim 1, it is characterised in that：Air pressure diaphragm (3) institute
Material is copper sheet, elasticity modulus 119Gpa, thickness 0.96mm, a diameter of 55.8mm.
5. a kind of fiber grating air pressure sensor according to claim 1, it is characterised in that：The inside of the protection shell
Equipped with a heat insulation coating, the heat insulation coating includes base (13), PU coatings (14), ceramic fiber particle, thermal insulating filling layer
(15), flame retardant coating (16), top coat layer (17)；The surface of the base (13) is provided with PU coatings (14), PU coatings (14)
Upper surface be provided with thermal insulating filling layer (15), is provided with ceramic fiber particle in thermal insulating filling layer (15)；It is described heat-insulated to fill out
The upper surface of the bed of material (15) is provided with flame retardant coating (16), and the upper surface of flame retardant coating (16) is provided with top coat layer (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820433208.6U CN207923341U (en) | 2018-03-29 | 2018-03-29 | A kind of fiber grating air pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820433208.6U CN207923341U (en) | 2018-03-29 | 2018-03-29 | A kind of fiber grating air pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207923341U true CN207923341U (en) | 2018-09-28 |
Family
ID=63597156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820433208.6U Expired - Fee Related CN207923341U (en) | 2018-03-29 | 2018-03-29 | A kind of fiber grating air pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207923341U (en) |
-
2018
- 2018-03-29 CN CN201820433208.6U patent/CN207923341U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 Termination date: 20200329 |
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| CF01 | Termination of patent right due to non-payment of annual fee |