CN108731639A - Hydrostatic level based on double diaphragm pressure sensing devices - Google Patents
Hydrostatic level based on double diaphragm pressure sensing devices Download PDFInfo
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- CN108731639A CN108731639A CN201810755451.4A CN201810755451A CN108731639A CN 108731639 A CN108731639 A CN 108731639A CN 201810755451 A CN201810755451 A CN 201810755451A CN 108731639 A CN108731639 A CN 108731639A
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- diaphragm
- pressure
- shell
- sensing devices
- hydrostatic level
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
- G01C5/04—Hydrostatic levelling, i.e. by flexibly interconnected liquid containers at separated points
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The present invention relates to the hydrostatic levels based on double diaphragm pressure sensing devices, including：Bowl shell and pressure sensor, pressure sensor are connected to the bottom of bowl shell；Pressure sensor includes fiber grating, shell and sets gradually a diaphragm, secondary diaphragm, pressure transmission bar, transfer beam, equi intensity cantilever inside housings from top to bottom, and fiber grating is pasted onto on equi intensity cantilever；The vessel surrounded between diaphragm, secondary diaphragm and shell is pressure transmission oil pocket, and gas connection interface tube and fluid connection interface tube are equipped on bowl shell.The hydrostatic level can realize that differential pressure redistributes, it is ensured that the pressure measured under vibration is uniform pressure, and then ensures the accuracy of measurement result.Belong to measuring instrument field.
Description
Technical field
The present invention relates to measuring instrument fields, specifically the hydrostatic level based on double diaphragm pressure sensing devices.
Background technology
Hydrostatic level using fluid connection device principle carry out level measurement, can in light condition bad, narrow space
It is not easily accessible etc. in the unsuitable environment for carrying out optical measurement and uses.It can be combined simultaneously with various sensors, realize automation
It measures, improves measurement accuracy and stability, meet the needs that engineering carries out structural elevation monitoring for a long time.
But most of existing hydrostatic level, such as float-type, reflective hydrostatic level, requiring must be in liquid level
Liquid level position measurement could be carried out under conditions of static, therefore cannot be accurate in the environment of subway tunnel, bridge etc. exist and vibrate
Really carry out level measurement.
Invention content
For the technical problems in the prior art, the purpose of the present invention is：It provides a kind of based on double diaphragm pressures biographies
The hydrostatic level of sensor, the hydrostatic level can realize that differential pressure redistributes, it is ensured that measure under vibration
Pressure be uniform pressure, and then ensure measurement result accuracy.
In order to achieve the above object, the present invention adopts the following technical scheme that：
Based on the hydrostatic level of double diaphragm pressure sensing devices, including：Bowl shell and pressure sensor, pressure sensor
It is connected to the bottom of bowl shell；Pressure sensor includes fiber grating, shell and sets gradually from top to bottom inside housings
A diaphragm, secondary diaphragm, pressure transmission bar, transfer beam, equi intensity cantilever, fiber grating is pasted onto on equi intensity cantilever；
The vessel surrounded between diaphragm, secondary diaphragm and shell is pressure transmission oil pocket, and being equipped with air communicating pipe on bowl shell connects
Mouth and fluid connection interface tube.After this structure, the differential pressure being subject on a diaphragm passes through in pressure transmission oil pocket
Hydraulic oil is delivered evenly on secondary diaphragm, realizes differential pressure redistribution, is scratched by pressure transmission bar and transfer beam transmission
Degree, distribution pressure measure equi intensity cantilever to equi intensity cantilever by the fiber grating being pasted onto on equi intensity cantilever
Strain obtain the liquid level in hydrostatic level to measure fluid pressure.
Preferably, shell includes lower plate and the round boss equipped with ladder in three-level；Diaphragm and secondary diaphragm according to
In the secondary first order ladder for being located at round boss；Pressure transmission bar, transfer beam, equi intensity cantilever are sequentially arranged at the second of round boss
In the middle part of grade ladder.After this structure, compact-sized, the pressure transmission stabilization of pressure sensor.
Preferably, the vertical spacing range of a diaphragm and secondary diaphragm is 5-20 millimeters.After this structure, ensure
Being sufficiently loaded in pressure transmission oil pocket makes the uniform hydraulic oil of pressure, it is ensured that the pressure for being transmitted to secondary diaphragm is uniform.
Preferably, the overhanging plectane spaced at equal angles around of bowl outer casing bottom is equipped with several bolts hole, under corresponding housing
Corresponding position also is provided with several bolts hole on bottom plate, and bowl shell and the lower plate of pressure sensor shell are detachable by bolt
Connection.After this structure, the replaceable function of pressure sensor is realized.
Preferably, transfer beam is horizontally disposed, and transmission rod is vertically arranged, and the lower part at transfer beam both ends is respectively provided with a semi-round ball
Body.After this structure, semicircle sphere ensure that the only vertical force for passing to equi intensity cantilever, no horizontal force are done
It disturbs, eliminates the influence for the moment of flexure that pressure bias generates.
Preferably, the quantity of equi intensity cantilever is two, is located at the lower section of the semicircle sphere of transfer beam；Equal strength
Cantilever beam upper surface centerline is equipped with a groove；Equi intensity cantilever one end is equipped with screw hole and is connected by screw in shell
On, the other end is used to place the semicircle sphere of transfer beam.After this structure, groove ensures transfer beam and equi intensity cantilever
It is completely embedded, and limits transfer beam and only moved on equi intensity cantilever center line.The structure of double equi intensity cantilevers passes through biography
Fluid pressure is assigned as two vertical forces and is respectively acting on two equi intensity cantilever free ends by power beam, is eliminated on pressure transmission bar
The influence of moment of flexure.Two equi intensity cantilever free end vertical forces are added as fluid pressure.
Preferably, fiber grating is pasted onto in the groove of equi intensity cantilever.After this structure, fiber grating is pasted
In the groove of equi intensity cantilever, while the semicircle sphere of transfer beam is also placed in the groove of equi intensity cantilever, is utilized
Fiber grating measure equi intensity cantilever strain, measure fluid pressure so that measure it is more accurate.
Preferably, the inside of overhanging plectane is equipped with sealing ring.After this structure, it is ensured that the sealing of hydrostatic level
Property.
Preferably, lower plate center offers the circular hole for being pierced by fiber grating；A diaphragm and secondary diaphragm it
Between round boss on the outside of be equipped with oil nozzle.After this structure, the circular hole of lower plate is convenient for the transmission of fiber grating, oil nozzle to use
In hydraulic oil is added or be discharged into pressure transmission oil pocket, oil nozzle is sealed after addition.
Preferably, two gas connection interface tubes are located at the top of two fluid connection interface tubes, fluid connection interface tube
Higher than pressure sensor；The axis horizontal of two gas connection interface tubes, the axis horizontal of a fluid connection interface tube are another
The axis of a fluid connection interface tube is acute angle diagonally downward and with horizontal angle.After this structure, two gases
The axis for being connected to interface tube is horizontally disposed, convenient to be connected with adjacent hydrostatic level, is balanced in a manner of by gas each
Pressure between hydrostatic level.One of fluid connection interface tube diagonally downward, makes bubble when injection liquid be easier to be discharged.
The principle of the present invention is：(1) diaphragm --- pressure transmission oil pocket --- structure for secondary diaphragm is used, by a film
The non-uniform pressure of on piece effect is converted into uniform pressure by pressure transmission oil pocket and is transmitted on secondary diaphragm.One time diaphragm is born
Non-uniform fluid pressure, compresses the liquid oil in pressure transmission oil pocket, and liquid oil equably passes pressure after redistributing pressure
It is delivered on secondary diaphragm, realizes differential pressure redistribution.(2) transfer beam --- the structure of double equi intensity cantilevers is used,
Amount of deflection, distribution pressure are transmitted to two equi intensity cantilevers by pressure transmission bar and transfer beam, and fluid pressure is assigned as two and is erected
Two equi intensity cantilever free ends are respectively acting on to power, to ensure to pass to the only vertical force of equi intensity cantilever, nothing
The influence for the moment of flexure that pressure bias generates is eliminated in the interference of horizontal force.Two equi intensity cantilever free end vertical forces, which are added, is
For fluid pressure.(3) equi intensity cantilever is measured by the fiber grating being pasted onto in the groove of equi intensity cantilever center line
Strain obtain the liquid level in hydrostatic level to measure fluid pressure.
Generally speaking, the invention has the advantages that：
The present invention is suitable for the level measurement under vibration environment, float etc. need not be used to contact device, eliminates float leaching
Do not have the influence that volume change measures liquid level position.Uneven hydraulic pressure is carried out by the bis- equi intensity cantilever structures of double diaphragms-
It measures, realizes that level gauging, measurement result are more accurate.Pressure sensor and bowl shell is bolted, realizes
The replaceable function of pressure sensor.
Description of the drawings
Fig. 1 is the cross-sectional view of apparatus of the present invention
Fig. 2 is the cross-sectional view of pressure sensor.
Fig. 3 is the diagrammatic cross-section of a diaphragm.
Fig. 4 is the diagrammatic cross-section of secondary diaphragm.
Fig. 5 is the schematic top plan view of pressure sensor shell.
Fig. 6 is the diagrammatic cross-section of pressure sensor shell.
Fig. 7 is the schematic three dimensional views of pressure sensor shell.
Fig. 8 is the schematic top plan view of equi intensity cantilever.
Fig. 9 is the schematic three dimensional views of equi intensity cantilever.
Figure 10 is the floor map of pressure transmission bar-transfer beam assembly.
Figure 11 is the schematic three dimensional views of pressure transmission bar-transfer beam assembly.
Figure 12 is the diagrammatic cross-section of the bowl shell of hydrostatic level.
Figure 13 is the partial enlarged view at A in Fig. 1.
Label and corresponding parts title in figure are：1 be a diaphragm, 2 be secondary diaphragm, 2-1 be back taper slot, 3
It is oil nozzle for pressure transmission oil pocket, 4,5 be pressure transmission bar, and 6 be transfer beam, and 6-1 is the semicircle sphere of transfer beam lower part, and 7 is outstanding for equal strength
Arm beam, 7-1 are the screw hole on equi intensity cantilever, and 7-2 is groove, and 8 be fiber grating, and 9 be shell, and 9-1 is lower plate, 9-
2 be circular hole, and 9-3 is the bolt hole on lower plate, and 9-4 is rectangular preiection, and 10 be bowl shell, and 10-1 connects for air communicating pipe
Mouthful, 10-2 is fluid connection interface tube, and 10-3 is overhanging plectane, and 10-4 is the bolt hole on overhanging plectane, and 11 be sealing ring, 12
For pressure sensor.
Specific implementation mode
It is next below in conjunction with the accompanying drawings that the present invention will be further described in detail.
A kind of hydrostatic level based on double diaphragm pressure sensing devices, including, it bowl shell and is bolted in alms bowl
The pressure sensor of body case bottom, pressure sensor is detachable relative to bowl shell, replaces.
Pressure sensor includes fiber grating, shell, a diaphragm, secondary diaphragm, pressure transmission bar, transfer beam, two etc. strong
Spend cantilever beam.
Shell includes lower plate and the round boss equipped with ladder in three-level, and lower plate is round tablet, and middle part is equipped with circle
Hole, so that fiber grating is pierced by.Lower plate is an integral structure with round boss, and the outer diameter of lower plate is more than the outer of round boss
Diameter；On lower plate, the outside of round boss be angularly distributed with eight bolts hole, for being connected by bolt with bowl shell
It connects.Diaphragm and secondary diaphragm are welded in the first order ladder of round boss successively from top to bottom；Diaphragm, secondary film
The vessel surrounded between piece and round boss is pressure transmission oil pocket.The side of pressure transmission oil pocket is equipped with oil nozzle, and oil nozzle is used for pressure transmission oil
Hydraulic oil is added or be discharged in chamber, seals oil nozzle after addition.The vertical spacing range of diaphragm and secondary diaphragm is 20 millis
Rice.Make the uniform hydraulic oil of pressure to ensure to be sufficiently loaded in pressure transmission oil pocket, it is ensured that the pressure for being transmitted to secondary diaphragm is uniform
's.
Pressure transmission bar, transfer beam, equi intensity cantilever are sequentially arranged at from top to bottom in the middle part of the second level ladder of round boss.It passes
The top of compression bar is conical structure, and the center of the bottom of secondary diaphragm is equipped with falls with what the cone at the top of pressure transmission bar matched
Bore slot.When installation, the cone of pressure transmission bar is fixed in the back taper slot of secondary diaphragm.Secondary diaphragm is by pressure transmission to pressure transmission
Bar.Transfer beam is horizontally disposed, and transmission rod is vertically arranged, and pressure transmission bar is fixed to each other with transfer beam, and the lower part at transfer beam both ends is respectively set
There is half spherosome.Semicircle sphere ensure that the only vertical force for passing to equi intensity cantilever, the interference of no horizontal force are eliminated
The influence for the moment of flexure that pressure bias generates.Equi intensity cantilever one end is equipped with screw hole and is connected by screw on shell, separately
One end is used to place the semicircle sphere of transfer beam.Equi intensity cantilever upper surface centerline is equipped with the groove of a bar shaped；Optical fiber
Grating is pasted onto in groove, and the both ends of fiber grating are pierced by from the circular hole at lower plate center, are connect with spectrometer.Transfer beam
Semicircle sphere is also stuck in groove, and the fiber grating utilized measures the strain of equi intensity cantilever, measures fluid pressure so that
It measures more accurate.Groove ensures that transfer beam is completely embedded with equi intensity cantilever, and limits transfer beam only in equal strength cantilever
It is moved on beam center line.Fluid pressure is assigned as two vertical force difference by the structure of double equi intensity cantilevers by transfer beam
Two equi intensity cantilever free ends are acted on, the influence of moment of flexure on pressure transmission bar is eliminated.Two equi intensity cantilever free ends
Vertical force is added as fluid pressure.
Two gas connection interface tubes and two fluid connection interface tubes are welded on bowl shell.Gas connection interface tube
Positioned at the top of fluid connection interface tube, fluid connection interface tube is higher than pressure sensor；The axis of two gas connection interface tubes
Line is horizontal, the axis horizontal of a fluid connection interface tube, and the axis of another fluid connection interface tube is diagonally downward and and water
The angle of horizontal line is acute angle.Gas connection interface tube horizontal welding connects, convenient to be connected with adjacent hydrostatic level, to pass through gas
The mode of body balances the pressure between each hydrostatic level.One of fluid connection interface tube diagonally downward, when making injection liquid
Bubble is easier to be discharged.
The overhanging plectane spaced at equal angles around of bowl bottom be equipped with eight bolts hole, be arranged on the lower plate of shell eight
A bolt hole corresponds, and bowl shell and the lower plate of pressure sensor shell realize that detachable, replacement connects by bolt.
Overhanging plectane inside bottom has a circle rectangular recess, and lower plate is equipped with a circle rectangular preiection, in rectangular recess and rectangular preiection
Between place and O-ring seal and fixed O-ring seal using rectangular recess and rectangular preiection.
In use, after filling hydraulic oil into pressure transmission oil pocket, air and liquid are injected to bowl enclosure, due to vibration
Under environment, equably passed by the hydraulic oil in pressure transmission oil pocket by the differential pressure of liquid in bowl shell on a diaphragm
It is delivered on secondary diaphragm, realizes differential pressure redistribution, given by pressure transmission bar and transfer beam transmission amount of deflection, distribution pressure etc.
Intensity cantilever beam measures the strain of equi intensity cantilever by the fiber grating being pasted onto on equi intensity cantilever, to measure
Go out fluid pressure, obtains the liquid level in hydrostatic level.
Other than the mode that above-described embodiment refers to, other strain transducers such as foil gauge can also be used to paste and waited by force
It spends in cantilever beam groove.These mapping modes are within the scope of the invention.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (10)
1. the hydrostatic level based on double diaphragm pressure sensing devices, which is characterized in that including：Bowl shell and pressure sensor,
Pressure sensor is connected to the bottom of bowl shell；Pressure sensor includes fiber grating, shell and sets gradually from top to bottom
A diaphragm, secondary diaphragm, pressure transmission bar, transfer beam, equi intensity cantilever inside housings, fiber grating are pasted onto equal strength
On cantilever beam；The vessel surrounded between diaphragm, secondary diaphragm and shell is pressure transmission oil pocket, and gas is equipped on bowl shell
It is connected to interface tube and fluid connection interface tube.
2. the hydrostatic level described in accordance with the claim 1 based on double diaphragm pressure sensing devices, it is characterised in that：Shell includes
Lower plate and round boss equipped with ladder in three-level；Diaphragm and secondary diaphragm are sequentially arranged at the first order rank of round boss
In ladder；Pressure transmission bar, transfer beam, equi intensity cantilever are sequentially arranged in the middle part of the second level ladder of round boss.
3. the hydrostatic level according to claim 2 based on double diaphragm pressure sensing devices, it is characterised in that：Diaphragm
Vertical spacing range with secondary diaphragm is 5-20 millimeters.
4. the hydrostatic level according to claim 2 based on double diaphragm pressure sensing devices, it is characterised in that：Bowl shell
The overhanging plectane spaced at equal angles around of bottom is equipped with several bolts hole, and corresponding position also is provided with several on the lower plate of corresponding housing
Bolt hole, bowl shell and the lower plate of pressure sensor shell are detachably connected by bolt.
5. the hydrostatic level described in accordance with the claim 1 based on double diaphragm pressure sensing devices, it is characterised in that：Transfer beam water
Flat setting, transmission rod are vertically arranged, and the lower part at transfer beam both ends is respectively provided with half spherosome.
6. the hydrostatic level according to claim 5 based on double diaphragm pressure sensing devices, it is characterised in that：Equal strength is outstanding
The quantity of arm beam is two, is located at the lower section of the semicircle sphere of transfer beam；Equi intensity cantilever upper surface centerline is set
There is a groove；Equi intensity cantilever one end is equipped with screw hole and is connected by screw on the platform of shell second level ladder, separately
One end is used to place the semicircle sphere of transfer beam.
7. the hydrostatic level according to claim 6 based on double diaphragm pressure sensing devices, it is characterised in that：Fiber grating
It is pasted onto in the groove of equi intensity cantilever.
8. the hydrostatic level according to claim 4 based on double diaphragm pressure sensing devices, it is characterised in that：Overhanging plectane
Inside be equipped with sealing ring.
9. the hydrostatic level according to claim 2 based on double diaphragm pressure sensing devices, it is characterised in that：In lower plate
The heart offers the circular hole for being pierced by fiber grating；Oil is equipped on the outside of round boss between a diaphragm and secondary diaphragm
Mouth.
10. the hydrostatic level described in accordance with the claim 1 based on double diaphragm pressure sensing devices, it is characterised in that：Two gas
Body connection interface tube is located at the top of two fluid connection interface tubes, and fluid connection interface tube is higher than pressure sensor；Two gas
Body is connected to the axis horizontal of interface tube, the axis horizontal of a fluid connection interface tube, the axis of another fluid connection interface tube
Line is acute angle diagonally downward and with horizontal angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810755451.4A CN108731639B (en) | 2018-07-11 | 2018-07-11 | Static level gauge based on double-diaphragm pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810755451.4A CN108731639B (en) | 2018-07-11 | 2018-07-11 | Static level gauge based on double-diaphragm pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108731639A true CN108731639A (en) | 2018-11-02 |
| CN108731639B CN108731639B (en) | 2020-07-28 |
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ID=63926732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810755451.4A Expired - Fee Related CN108731639B (en) | 2018-07-11 | 2018-07-11 | Static level gauge based on double-diaphragm pressure sensor |
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| Country | Link |
|---|---|
| CN (1) | CN108731639B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457889A (en) * | 2020-06-02 | 2020-07-28 | 中际物联科技（深圳）有限公司 | Method for monitoring subway tunnel settlement through optical fiber static level |
| CN113532379A (en) * | 2021-07-29 | 2021-10-22 | 铁正检测科技有限公司 | Building engineering settlement monitoring device, monitoring system and method |
| CN114568330A (en) * | 2022-02-21 | 2022-06-03 | 牧原食品股份有限公司 | Feeding device and method for calculating amount of feed in feeding device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901593A (en) * | 2012-11-01 | 2013-01-30 | 中国科学院半导体研究所 | Fiber Bragg grating soil pressure sensor based on two L-type beams |
| CN204346620U (en) * | 2015-01-21 | 2015-05-20 | 西安科技大学 | A kind of rock pressure [in mine sensor based on fiber grating |
-
2018
- 2018-07-11 CN CN201810755451.4A patent/CN108731639B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901593A (en) * | 2012-11-01 | 2013-01-30 | 中国科学院半导体研究所 | Fiber Bragg grating soil pressure sensor based on two L-type beams |
| CN204346620U (en) * | 2015-01-21 | 2015-05-20 | 西安科技大学 | A kind of rock pressure [in mine sensor based on fiber grating |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457889A (en) * | 2020-06-02 | 2020-07-28 | 中际物联科技（深圳）有限公司 | Method for monitoring subway tunnel settlement through optical fiber static level |
| CN113532379A (en) * | 2021-07-29 | 2021-10-22 | 铁正检测科技有限公司 | Building engineering settlement monitoring device, monitoring system and method |
| CN114568330A (en) * | 2022-02-21 | 2022-06-03 | 牧原食品股份有限公司 | Feeding device and method for calculating amount of feed in feeding device |
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| Publication number | Publication date |
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| CN108731639B (en) | 2020-07-28 |
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