CN208998774U - Sedimentation amount of deflection sensor based on fiber grating - Google Patents
Sedimentation amount of deflection sensor based on fiber grating Download PDFInfo
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- CN208998774U CN208998774U CN201820837721.1U CN201820837721U CN208998774U CN 208998774 U CN208998774 U CN 208998774U CN 201820837721 U CN201820837721 U CN 201820837721U CN 208998774 U CN208998774 U CN 208998774U
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Abstract
The utility model discloses the sedimentation amount of deflection sensors based on fiber grating, section is sensed including A and B senses section, the A sensing section and B sensing section are symmetrical arranged, it is identical with the structure of B sensing section that A senses section, A sensing section and B sensing section are installed in sensor base, the inside of A sensing section and B sensing section is equipped with multiple horizontally disposed partitions, the A sensing section and B sensing Duan Jun include shell, the side of shell is equipped with opening, opening is equipped with sensor side cover, it is threadedly coupled between sensor side cover and shell, the inside of the shell is equipped with sensing section, it senses section and is equipped with pressure ring, pressure ring is mounted on the inside of shell.Liquid is in dispersion isolation under the barrier action of partition by pressure indoor liquid in the utility model, impact to pressure-sensitive diaphragm is brought with this to reduce dynamic process liquid sloshing, it is very small to the percussion of pressure-sensitive diaphragm, influence of the exterior power to measurement is greatly reduced, measurement error is small.
Description
Technical field
The utility model relates to sensor technical field, more particularly to the sedimentation amount of deflection sensor based on fiber grating.
Background technique
Due to bridge be self-possessed and bridge on load action can generate certain amount of deflection, with the hair of bridge Construction Technology
Exhibition, Bridges in Our Country span are just increasing, and China's high-speed rail also largely uses the form of overpass, in high-speed rail train high-speed cruising
In the process, the dynamic load that bridge is born easily causes bridge and generates moderate finite deformation.Traditional deflection observation means efficiency is lower, and
And it is larger by human factor or such environmental effects, the degree of automation and measurement accuracy are not able to satisfy actual demand.It is existing
Fiber grating bridge deflection sensor is affected by dynamic load, and the error for measuring generation is larger.And due to high-rise
The factors such as construction, underground mining or exhaustive exploitation underground water, soft soil roadbed sinking, will cause settlement of foundation.Settlement observation is to height
All various aspects such as safety, the high-speed rail traffic safety of layer building are all of great significance.Traditional settlement observation means effect
Rate is lower, and larger by human factor or such environmental effects, and the degree of automation and measurement accuracy are not able to satisfy practical need
It asks.
Fiber-optic grating sensor is one of the fibre optical sensor being most widely used at present, can measure strain, temperature, pressure
The parameters such as power, displacement, flow, liquid level.Its sensing principle is generally basede on measured parameter variation and causes screen periods and effectively refraction
The variation of rate measures above-mentioned parameter by measuring the amount of movement of characteristic wavelength so as to cause the variation of spectra features wavelength.Mesh
Before, it is very more using the pressure of fiber grating or liquid level sensor both at home and abroad, but specifically for sedimentation and bridge deflection monitoring
Fiber-optic grating sensor report it is less.
Existing fiber grating differential pressure pickup all has certain disadvantages, and the present invention successfully overcomes most of lack
Point.A kind of existing fiber grating measures sedimentation device, can measure to surface subsidence, but the device volume is larger, pushes away
It is wide to acquire a certain degree of difficulty using tool.There are also a kind of fiber bragg grating settlement sensor, small volume, but the device are horizontal positioned, dynamic
Under power effect, liquid teetertotters under power effect in cavity, has biggish percussion to pressure-sensitive diaphragm, therefore measure
Precision can not be guaranteed, thus it is proposed that a kind of sedimentation amount of deflection sensor based on fiber grating.
Utility model content
Purpose of the utility model is to solve disadvantage existing in the prior art, and propose based on fiber grating
Settle amount of deflection sensor.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of sedimentation amount of deflection sensor based on fiber grating, including A sensing section and B sense section, the A sensing section and B
Section is sensed to be symmetrical arranged, the structure of A sensing section and B sensing section is identical, and A sensing section and B sensing section are installed in sensor base,
The inside of A sensing section and B sensing section is equipped with multiple horizontally disposed partitions.
Preferably, the A sensing section and B sensing Duan Jun include shell, and the side of shell is equipped with opening, and opening, which is equipped with, to be passed
Sensor side cover is threadedly coupled between sensor side cover and shell, and the inside of the shell is equipped with sensing section, and sensing section is equipped with pressure
Ring, pressure ring are mounted on the inside of shell, and pressure-sensitive diaphragm is fixedly installed on pressure ring, and pressure-sensitive diaphragm is placed on vertically in sensing section
Portion position, pressure-sensitive diaphragm two sides are equipped with washer, and pressure-sensitive diaphragm is equipped with pressure chamber far from the side of sensor side cover, pressure chamber
Two sides are respectively equipped with inlet opening and apopore, and inlet opening and apopore extend respectively to the outside of shell, and the inside of pressure chamber is set
There are multiple horizontally disposed partitions, pressure sensing grating, one end connection of pressure sensing grating are pasted on the pressure-sensitive diaphragm
There is temperature sensing grating, one end that pressure sensing grating and temperature sensing grating are located remotely from each other is connected separately with incoming optical fiber and biography
Optical fiber out has line-entering hole and outlet hole on the two sides side wall of the shell, and incoming optical fiber and outflow optical fiber are each passed through
Line-entering hole and outlet hole extend to the outside of shell, and the top of the shell is equipped with gas vent, and one end of gas vent is connected with pressure
Power room, gas vent are equipped with air-vent cap far from one end of pressure chamber, and temperature sensing grating is not Nian Jie with pressure-sensitive diaphragm, temperature sensing light
Grid are loosely placed in shell, and pressure sensing grating, temperature sensing grating, incoming optical fiber and outflow optical fiber are respectively positioned on pressure membrane
Side of the piece far from pressure chamber.
The strain that liquid level difference is converted to in the utility model using pressure-sensitive diaphragm center, causes optical fiber cloth on diaphragm
The strain and wavelength change of glug grating, to can accurately measure liquid level caused by sedimentation or deflection of bridge span variation by wavelength change
Difference variation；The present apparatus is by changing the thickness of pressure-sensitive diaphragm and can be convenient with the height difference of the water tank of its connection and sensor
Deflection metrology range and measurement accuracy are adjusted, different occasions are suitable for；Pressure indoor liquid is under the barrier action of partition by liquid
Body is in dispersion isolation (each small space have through-hole be connected to guarantee that hydraulic pressure is equal everywhere), reduces dynamic process with this
Liquid sloshing brings the impact to pressure-sensitive diaphragm, very small to the percussion of pressure-sensitive diaphragm, greatly reduces exterior power
Influence to measurement to reduce measurement error, and has many advantages, such as that small in size, simple installation, at low cost, precision is high, just
In progress large-scale application.
Detailed description of the invention
Fig. 1 be the utility model proposes the sedimentation amount of deflection sensor based on fiber grating main view；
Fig. 2 be the utility model proposes the A of sedimentation amount of deflection sensor based on fiber grating sense section or B sensing section
Perspective view of the explosion；
Fig. 3 be the utility model proposes the sedimentation amount of deflection sensor based on fiber grating broken section structural representation
Figure；
Fig. 4 be the utility model proposes the sedimentation amount of deflection sensor based on fiber grating schematic cross-sectional view.
In figure: 1 sensor base, 2 sensing sections, 3 sensor side covers, 4 pressure-sensitive diaphragms, 5 pressure chambers, 6 inlet openings, 7 water outlets
Hole, 8 pressure sensing gratings, 9 temperature sensing gratings, 10 incoming optical fiber, 11 outflow light, 12 line-entering holes, 13 outlet holes, 14 exhausts
Hole, 15 air-vent caps, 16 washers, 17 pressure rings, 18 shells, 19 partitions.
Specific embodiment
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.
Referring to Fig.1-4, the sedimentation amount of deflection sensor based on fiber grating, including A sensing section and B sense section, A sense section and
B senses section and is symmetrical arranged, and the structure of A sensing section and B sensing section is identical, and A sensing section and B sensing section are installed in sensor base
The inside of 1, A sensing section and B sensing section is equipped with multiple horizontally disposed partitions 19, and it includes shell that A, which senses section and B sensing Duan Jun,
18, the side of shell 18 is equipped with opening, and opening is equipped with sensor side cover 3, and screw thread connects between sensor side cover 3 and shell 18
It connects, the inside of the shell 18 is equipped with sensing section 2, and sensing section 2 is equipped with pressure ring 17, and pressure ring 17 is mounted on the inside of shell 18, presses
Pressure-sensitive diaphragm 4 is fixedly installed on ring 17, pressure-sensitive diaphragm 4 is placed on the medium position of sensing section 2,4 two sides of pressure-sensitive diaphragm vertically
It is equipped with washer 16, pressure-sensitive diaphragm 4 is equipped with pressure chamber 5 far from the side of sensor side cover 3, and the two sides of pressure chamber 5 are respectively equipped with
Inlet opening 6 and apopore 7, inlet opening 6 and apopore 7 extend respectively to the outside of shell 18, and the inside of pressure chamber 5 is equipped with multiple
Horizontally disposed partition 19 is pasted with pressure sensing grating 8 on the pressure-sensitive diaphragm 4, and one end of pressure sensing grating 8 is connected with
One end that temperature sensing grating 9, pressure sensing grating 8 and temperature sensing grating 9 are located remotely from each other is connected separately with incoming optical fiber 10
With outflow optical fiber 11, line-entering hole 12 and outlet hole 13 are had on the two sides side wall of the shell 18, are passed to optical fiber 10 and are passed
Optical fiber 11 is each passed through line-entering hole 12 out and outlet hole 13 extends to the outside of shell 18, and the top of the shell is equipped with gas vent
14, one end of gas vent 14 is connected with pressure chamber 5, and gas vent 14 is equipped with air-vent cap 15, temperature sensing far from one end of pressure chamber 5
Grating 9 is not Nian Jie with pressure-sensitive diaphragm 4, and temperature sensing grating 9 is loosely placed in shell 18, and pressure sensing grating 8, temperature pass
Photosensitive grid 9, incoming optical fiber 10 and outflow optical fiber 11 are respectively positioned on side of the pressure-sensitive diaphragm 4 far from pressure chamber 5；
When in use, liquid only has very the pressure-sensitive diaphragm 4 of rear side under the action of upper and lower acceleration in pressure chamber 5
Small influence；
In pressure chamber 5 liquid under the barrier action of partition 18 by liquid component dissipate each insulating space of isolation have it is logical
Hole is connected to guarantee that hydraulic pressure is equal everywhere, brings impact to pressure-sensitive diaphragm with this to reduce dynamic testing process liquid sloshing,
Influence of the exterior power to measurement is greatly reduced, the test accuracy and reliability of vibrating state lower sensor are improved.
The upper end of pressure chamber 5 is additionally provided with gas vent 14, when sensor is installed for the first time, should can be incited somebody to action by row with stomata 14
Residual air in pressure chamber 5 excludes, and is then sealed pressure chamber using vent cap 15；
Pressure-sensitive diaphragm 4 is flat diaphragm or convoluted diaphragm, and the diaphragm of replacement different-thickness can be required according to measurement accuracy；
Sensor first half is identical as latter half structure, and first half is as test sensing section, inlet opening 6 and water outlet
Hole 7 is connect communicating pipe with outside；Latter half senses section as vibration compensation, full of inlet opening 6, apopore 7 are sealed after water,
And seal vents 14 make fluid pressure room 5 become confined space, for testing the vibration self compensation of sensor.
Embodiment: sensor is made of the full symmetric consistent A in front and back, part B, between sensor base 1 and sensing section 2
It being fastened with M6 screw 14, washer 15 is first loaded at the middle part of sensing section 2, then installs pressure-sensitive diaphragm 4, washer 16 is then put again, then
It is closely pushed down with pressure ring 17, partially forms fluid pressure room 5 between pressure-sensitive diaphragm 4 and sensing section 2, be equipped with many water in pressure chamber
For flat partition by pressure chamber's liquid separation at many small spaces of level, pressure chamber 5 or so is respectively arranged with inlet opening 6 and water outlet
Hole 7, pressure chamber top are equipped with gas vent 14, and inlet opening 6, apopore 7 and gas vent 14 are welded using threaded connection or directly
It is fixed in sensing section 2.When sensor is installed for the first time, the indoor residual air of pressure should be excluded by gas vent 12, so
Pressure chamber is sealed using air-vent cap 15 afterwards.When measurement, the inlet opening 6 of first half sensing section and apopore 7 are connected to outside
Pipe connection；Latter half sensing Duan Ze blocks inlet opening 6, apopore 7 after being full of water, and seal vents 14 make fluid pressure
Room 5 becomes confined space, and the rear section that senses is as the error compensation of preceding sensing section.Multiple differential pressure pickups are connect on cross over pipe to realize
The deflection monitoring or settlement monitoring of the multiple positions of bridge.Liquid level difference in communicating pipe between liquid level and pressure-sensitive diaphragm will cause pressure
The strain of center.Pressure sensing grating 8 be tightly attached to 4 center of pressure-sensitive diaphragm arrangement, temperature sensing grating 9 not with sensing
Section 2 and pressure-sensitive diaphragm 4 contact, and pressure sensing grating 8 and temperature sensing grating 9 are connected and pressure sensing grating 8 and temperature sensing
The connected incoming optical fiber 10 of grating 9 and outflow optical fiber 11 are penetrated and are pierced by by line-entering hole 12 on wall and outlet hole 13.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (1)
1. a kind of sedimentation amount of deflection sensor based on fiber grating, including A sensing section and B sense section, which is characterized in that the A
It senses section and B sensing section is symmetrical arranged, the structure of A sensing section and B sensing section is identical, and A sensing section and B sensing section are installed in biography
The inside of sensor pedestal (1), A sensing section and B sensing section is equipped with multiple horizontally disposed partitions (19)；The A sensing section and B
Sensing Duan Jun includes shell (18), and the side of shell (18) is equipped with opening, and opening is equipped with sensor side cover (3), sensor side
It is threadedly coupled between lid (3) and shell (18), the inside of the shell (18) is equipped with sensing section (2), and sensing section (2) is equipped with pressure ring
(17), pressure ring (17) is mounted on the inside of shell (18), is fixedly installed on pressure ring (17) pressure-sensitive diaphragm (4), pressure-sensitive diaphragm (4)
It is placed on the medium position of sensing section (2) vertically, pressure-sensitive diaphragm (4) two sides are equipped with washer (16), and pressure-sensitive diaphragm (4) is far from biography
The side of sensor side cover (3) is equipped with pressure chamber (5), and the two sides of pressure chamber (5) are respectively equipped with inlet opening (6) and apopore (7), into
Water hole (6) and apopore (7) extend respectively to the outside of shell (18), and the inside of pressure chamber (5) is equipped with multiple horizontally disposed
Partition (19) is pasted with pressure sensing grating (8) on the pressure-sensitive diaphragm (4), and one end of pressure sensing grating (8) is connected with temperature
It spends sensing grating (9), one end that pressure sensing grating (8) and temperature sensing grating (9) are located remotely from each other is connected separately with incoming light
Fine (10) and optical fiber (11) are spread out of, have line-entering hole (12) and outlet hole (13) on the two sides side wall of the shell (18),
Incoming optical fiber (10) and outflow optical fiber (11) is each passed through line-entering hole (12) and outlet hole (13) extends to the outside of shell (18),
The top of the shell is equipped with gas vent (14), and one end of gas vent (14) is connected with pressure chamber (5), and gas vent (14) is far from pressure
One end of power room (5) is equipped with air-vent cap (15), and temperature sensing grating (9) is not Nian Jie with pressure-sensitive diaphragm (4), temperature sensing grating
(9) it is loosely placed in shell (18), and pressure sensing grating (8), temperature sensing grating (9), incoming optical fiber (10) and outflow
Optical fiber (11) is respectively positioned on the side of pressure-sensitive diaphragm (4) far from pressure chamber (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820837721.1U CN208998774U (en) | 2018-06-01 | 2018-06-01 | Sedimentation amount of deflection sensor based on fiber grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820837721.1U CN208998774U (en) | 2018-06-01 | 2018-06-01 | Sedimentation amount of deflection sensor based on fiber grating |
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| Publication Number | Publication Date |
|---|---|
| CN208998774U true CN208998774U (en) | 2019-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820837721.1U Expired - Fee Related CN208998774U (en) | 2018-06-01 | 2018-06-01 | Sedimentation amount of deflection sensor based on fiber grating |
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| Country | Link |
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| CN (1) | CN208998774U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514134A (en) * | 2019-09-30 | 2019-11-29 | 西南石油大学 | Bridge dynamic deflection monitoring method based on distribution type fiber-optic |
-
2018
- 2018-06-01 CN CN201820837721.1U patent/CN208998774U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514134A (en) * | 2019-09-30 | 2019-11-29 | 西南石油大学 | Bridge dynamic deflection monitoring method based on distribution type fiber-optic |
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Legal Events
| 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: 20190618 Termination date: 20200601 |
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| CF01 | Termination of patent right due to non-payment of annual fee |