CN208860519U - Push-Pull Fiber Optic Differential Pressure Sensor - Google Patents
Push-Pull Fiber Optic Differential Pressure Sensor Download PDFInfo
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- CN208860519U CN208860519U CN201821230972.XU CN201821230972U CN208860519U CN 208860519 U CN208860519 U CN 208860519U CN 201821230972 U CN201821230972 U CN 201821230972U CN 208860519 U CN208860519 U CN 208860519U
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Abstract
The utility model discloses a kind of pair of temperature-insensitive, measurement range is adjustable, anti-strong electromagnetic, burn-proof and explosion prevention, multiplexing, long-range measurement, the push-pull type optical fiber differential pressure pickup that low in cost, performance is stable.The push-pull type optical fiber differential pressure pickup, including the fixed device of fiber adapter, optical fiber self-focusing lens, the fixed device of plane mirror, support column, equalizer bar, driving column, encapsulating shell, elastic metallic bellows, ring flange, logical pressure conduit；It is low in cost, performance is stable, is easily changed and repairs using the push-pull type optical fiber differential pressure pickup.In use, multiple sensors can be used in conjunction with a set of broad spectrum light source, photodetector, realize the quasi- distribution measuring of multiple spot；Telemetry network can be formed with fibre-optic transmission system (FOTS), realize remote real time monitoring and measurement.
Description
Technical field
The utility model relates to technical field of optical fiber sensing, especially a kind of push-pull type optical fiber differential pressure pickup.
Background technique
Well-known: differential pressure pick-up is a kind of sensor for measuring difference between two pressure, is commonly used in
Measure the pressure difference of a certain equipment or component rear and front end.Differential pressure pick-up micro-flow measurement, leak-testing, clean room monitoring,
Many high-acruracy survey occasions such as environmental sealing detection, gas flow measurement, height of liquid level measurement, which suffer from, to be widely applied.
For example, being applied to engine nozzle sealing propertytest, vapour to differential pressure pick-up in sealing element detection field
The sealing propertytest etc. of vehicle master cylinder is studied；The field in fluid flowing research and fluid conveying engineering, differential pressure pass
It is poor that sensor can flow through the slight pressure between two o'clock for precise measurement fluid；And the liquid level precise measurement in liquid
In field, differential pressure pick-up can be applied to the measurement and control such as tap water water level, oil field, the oil tank of oil plant and oil storage tank
Oil-level measurement etc..
Currently, differential pressure pick-up mainly has pressure resistance type and two kinds of condenser type, the prominent advantage of piezoresistive transducer is structure
Simply, operative end surface is smooth.But this sensor also has many deficiencies, between sensitivity and frequency response there is compared with
Contradiction outstanding, and temperature is also bigger on the influence of the performance of such sensor.Capacitance type sensor has structure simple, sensitive
Degree is high, and dynamic response characteristic is good, and anti-overload ability is strong, adaptable to mal-conditions such as high temperature, radiation and judders etc. excellent
Point has made it a kind of promising sensor.But the shortcomings that there are problems that due to it and, it is non-thread such as output characteristics
The influence to sensitivity and measurement accuracy of property, parasitic capacitance and distribution capacity and the circuit connecting with sensor are more complicated
Deng influencing its application reliability, need to take certain compensation and corrective action, therefore limit its extensive use.
Since optical fiber sensing technology has, fire prevention, explosion-proof, precision is high, loss is low, small in size, light weight, service life length, sexual valence
Than high, reusability is good, fast response time, electromagnetism interference, frequency range is wide, dynamic range is big, easily with fibre-optic transmission system (FOTS) group
Many advantages, such as at telemetry network, the differential pressure pick-up based on optical fiber sensing technology also expand corresponding research.Japan
Seiichiro KINUGASA proposes a kind of optical fiber differential pressure pickup KINUGASA based on intensity modulated
Seiichiro.Fringe Amplitude Modulation Method for Differential Pressure Sensor
[C] //IEEE SENSORS, EXCO Daegu, Korea, 2006:22-25..The principle of such sensor is penetrated for incident optical
Light direct irradiation out on reflector, reflected light signal that reception optical fiber is received with reflector and reception optical fiber end spacing
From variation and change, thus the displacement of reflector or the size of corner can be determined by the power that detection receives light.It is this
There are two major defects for fibre optical sensor: first is that the fluctuation of the intensity of light source can bring biggish error to measurement, second is that reflector
The reflectivity on surface also leads to the inaccuracy of measurement with the variation of use environment at any time.The Hao-Jan SHENG in Taiwan etc.
People designs a kind of differential pressure pick-up SHENG Hao-Jan, LIU Wen-Fung, LIN based on fiber bragg grating
Kuei-Ru, et al.High-sensitivity Temperature-independent Differential Pressure
Sensor using Fiber Bragg Gratings [J] .Optics Express, 2008,16 (20): 16014-16018.
And a kind of applicant's optical fiber differential pressure air velocity transducer Chinese patent disclosed in 2016: 201620800354.9, optical fiber cloth
Mainly axial strain occurs for glug grating differential pressure pick-up to make the wavelength of output light send out according to fiber bragg grating stress
Raw to change, the reflecting light long value by comparing two sections of gratings derives pressure difference.Since such sensor is according to single light
Pressure measurement is realized in fine axial strain, although sensitivity is very high, measurement range is smaller, and vulnerable to vibration interference.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of pair of temperature-insensitive, measurement range is adjustable, anti-strong
Electromagnetic interference, burn-proof and explosion prevention, multiplexing, long-range measurement, the push-pull type optical fiber differential pressure pickup that low in cost, performance is stable.
The technical scheme adopted by the utility model to solve the technical problem is as follows: push-pull type optical fiber differential pressure pickup, including
The fixed device of fiber adapter, optical fiber self-focusing lens, plane mirror fixed device, support column, equalizer bar, driving column, envelope
Fill shell, elastic metallic bellows, ring flange, logical pressure conduit；
The encapsulating shell has inner cavity；The top of encapsulating shell is arranged in the fiber adapter；The optical fiber self-focusing is saturating
The top of encapsulating shell inner cavity is arranged in the fixed device of mirror；The fiber adapter and the fixed device of optical fiber self-focusing lens pass through light
Fibre connection；The support column is vertically provided at the interior intracavitary of encapsulating shell, and the lower end of the support column is located at inner cavity lower surface
Middle position；The upper end of the support column is provided with equalizer bar, and the middle position of the equalizer bar and support are column articulated；
The two sides of the support column are provided with elastic metallic bellows；Biography is provided at the top of the elastic metallic bellows
Dynamic column, the upper end of the driving column and one end of equalizer bar connect；The upper end of the driving column is provided with plane mirror and fixes
Device；The fixed device of the plane mirror is located at the underface of the fixed device of optical fiber self-focusing lens；
The elastic metallic ripple bottom of the tube is fixed on inner cavity lower surface by ring flange；Elastic metallic bellows bottom
Portion is provided with logical pressure conduit.
Further, the fixed device of the plane mirror include stud, angle modulation screw, rubber ring, plane mirror with
And upper mounting plate and lower installation board；
The top of upper mounting plate is arranged in the stud；The rubber ring is arranged between upper mounting plate and lower installation board；
Transverse groove is provided on the upper mounting plate；Two angle modulation screws, two angle modulation are provided on the upper mounting plate
Screw is located at the two sides of stud；Wherein an angle modulation screw is extended in lower installation board by upper mounting plate insertion, and under
Mounting plate is threadedly engaged；One end of another angle modulation screw is inserted into mounting plate by transverse groove, and with lower installation board screw thread
Cooperation；The plane mirror is mounted on the bottom surface of lower installation board.
Further, the fixed device of the optical fiber self-focusing lens include optical fiber self-focusing lens, the second angle modulation screw,
Second rubber ring, fixing seat；Be provided with condenser lens mounting base in the fixing seat, second rubber ring be located at fixing seat with
Between condenser lens mounting base, the optical fiber self-focusing lens is mounted on condenser lens mounting base upper end, the condenser lens peace
Dress seat tool has flange；The second angle modulation screw is arranged on flange, and at least has three；The one of the second angle modulation screw
End sequentially passes through flange, the second rubber ring is inserted into fixing seat, and is threadedly engaged with fixing seat.
Further, it is provided with installation base in the condenser lens mounting base, installation is set on the installation base
Set；Fastening screw is provided in the installation set；The optical fiber self-focusing lens is mounted at the top of installation base.
The beneficial effects of the utility model are: push-pull type optical fiber differential pressure pickup described in the utility model, has following
Advantage:
1) a kind of push-pull type optical fiber differential pressure pickup described in the utility model, it is active to be separated from each other design with passive device
It can work under the adverse circumstances such as strong electromagnetic, inflammable and explosive.
2) a kind of push-pull type optical fiber differential pressure pickup described in the utility model, elastic metallic ripple used in sensor
Pipe can be replaced according to actual needs, realize that measurement range and sensitivity are adjustable.
3) a kind of push-pull type optical fiber differential pressure pickup described in the utility model, it is low in cost, performance is stable, is easily changed
And maintenance.
Further, in use:
4) a kind of push-pull type optical fiber differential pressure pickup described in the utility model, multiple sensors can be used in conjunction with a set of width
Spectroscopic light source, photodetector realize the quasi- distribution measuring of multiple spot.
5) a kind of push-pull type optical fiber differential pressure pickup described in the utility model, the space of wide spectrum optical passes on scanning shift platform
It is defeated to bring temperature error, but its space propagation distance does not exceed 15cm, so temperature bring error can be ignored.
6) a kind of push-pull type optical fiber differential pressure pickup described in the utility model can form telemetering with fibre-optic transmission system (FOTS)
Network realizes remote real time monitoring and measurement.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of push-pull type optical fiber differential pressure pickup in the utility model embodiment；
Fig. 2 is in the utility model embodiment for the perspective view of the fixed device of optical fiber self-focusing；
Fig. 3 is the main view that Reflecting mirror fixing device is pushed away in the utility model embodiment；
Fig. 4 is the top view that Reflecting mirror fixing device is pushed away in the utility model embodiment；
Fig. 5 is the measuring system figure of push-pull type optical fiber differential pressure pickup in the utility model embodiment；
Fig. 6 is experimental data figure in the utility model embodiment；
It is indicated in figure: 1- broad spectrum light source；2- photodetector；3- fiber coupler；The first optical patchcord of 4-；5- second
Optical patchcord；6- scanning shift platform；8- push-pull type optical fiber differential pressure pickup；9- fiber adapter；10- optical fiber self-focusing lens is solid
Determine device；11- plane mirror fixes device；12- support column；3- equalizer bar；14- driving column；15- encapsulating shell；16- elasticity gold
Belong to bellows；17- ring flange；The logical pressure conduit of 18-.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in Figures 1 to 6, push-pull type optical fiber differential pressure pickup described in the utility model, including fiber adapter 9,
Optical fiber self-focusing lens fixes the fixed device 11 of device 10, plane mirror, support column 12, equalizer bar 13, driving column 14, encapsulation
Shell 15, elastic metallic bellows 16, ring flange 17, logical pressure conduit 18；
The encapsulating shell 15 has inner cavity；The top of encapsulating shell 15 is arranged in the fiber adapter 9；The optical fiber autohemagglutination
The top of 15 inner cavity of encapsulating shell is arranged in the fixed device 10 of focus lens；The fiber adapter 9 is fixed with optical fiber self-focusing lens
Device 10 is connected by optical fiber；The support column 12 is vertically provided at the interior intracavitary of encapsulating shell 15, and under the support column 12
End is located at the middle position of inner cavity lower surface；The upper end of the support column 12 is provided with equalizer bar 13, in the equalizer bar 13
Between position and support column 12 it is hinged；
The two sides of the support column 12 are provided with elastic metallic bellows 16；It is set at the top of the elastic metallic bellows 16
It is equipped with driving column 14, the upper end of the driving column 14 is connect with one end of equalizer bar 13；The upper end of the driving column 14 is provided with
Plane mirror fixes device 11；The fixed device 11 of the plane mirror is being located at the fixed device 10 of optical fiber self-focusing lens just
Lower section；
16 bottom of elastic metallic bellows is fixed on inner cavity lower surface by ring flange 17；The elastic metallic ripple
16 bottom of pipe is provided with logical pressure conduit 18.
The measurement method in order to better understand, on our needle scanning shift platforms the moving distance X of self-focusing lens 71 with
The linear relationship of testing pressure difference, which is made, to be explained in detail and illustrates.
As shown in Figure 1, the 16 input pressure F1 of metal bellows in the left side to the sensor, right side metal bellows 16 are defeated
Enter pressure F2, since the sensor uses a kind of full symmetric structure, and identical material is used, so the influence of temperature
It can cancel out each other and ignore.Assuming that pressure F1 be greater than pressure F2, then under the collective effect of pressure F1 and pressure F2 left side
Metal bellows 16 is axially stretched, and right side metal bellows 16 is compressed axially, deformation quantity it is identical and with pressure F1 and
The pressure difference a of pressure F2 is in a linear relationship, is set as ax.Since the variation of metal bellows is so that the sensor light path difference is equally sent out
Raw axn1Variation, wherein n1For ambient refractive index locating for differential pressure pick-up.
To keep the two-arm light path of the sensor equal again, position of the mobile self-focusing lens 71 on scanning shift platform,
Until observing white-light fringe primary maximum again in photodetector 2, moving distance is X, change in optical path length Xn at this time2,
Wherein n2For the refractive index of displacement platform local environment.
Then white light interference theory obtains:
axn1=Xn2
When sensor is identical as scanning shift platform local environment, obtain:
ax=X
Therefore, we can obtain testing pressure difference a according to the moving distance X of scanning shift platform.
In the specific application process:
Step 1: system building.The measuring system that each device forms push-pull type optical fiber differential pressure pickup is connected by Fig. 5；It should
Measuring system include broad spectrum light source 1, photodetector 2, fiber coupler 3, the first optical patchcord 4, the second optical patchcord 5,
Scanning shift platform 6, optical fiber self-focusing lens 7, optical fiber differential pressure pickup 8；Broad spectrum light source 1 and photodetector 2 respectively with light
The end a of fine coupler 3 is connected with the end b, and the end c and the end d are separately connected the first optical patchcord 4 and the first self-focusing lens 71, and first
The other end of optical patchcord 4 is connected with the fiber adapter 9 in optical fiber differential pressure pickup 8.First self-focusing lens 71 and second
Self-focusing lens 72 is aligned and on scanning shift platform 6, and 72 position of the second self-focusing lens is fixed, the first self-focusing lens 71
Position is adjustable, and the second self-focusing lens 72 is connected to fiber adapter 9 by the second optical patchcord 5.
Specifically, the broad spectrum light source 1 is one of LED light source, SLD/SLED light source, ASE light source.
In the state of the equilibrium, plane is arrived at the end c, the end d of fiber coupler 3 to the push-pull type optical fiber differential pressure pickup 8 respectively
The equivalent optical path of 114 mirror surface of reflecting mirror, and at this time the first self-focusing lens 71 at the center of the effective moving distance of scanning shift platform 6
Position or so.
The length of the optical patchcord 4 and optical patchcord 5 may be as little to several centimetres, can also grow to several kilometers or more
It is long.
Above-mentioned push-pull type optical fiber differential pressure pickup is mainly the measurement that pressure difference is realized using optical fiber white light interference principle,
Under different pressures effect corresponding axial deformation occurs for two bellowss 6 of sensor internal, and then leads to Michelson white light
Interferometer two-arm optical path light path changes, and obtains interference fringe again by the movement of scanning shift platform 6 in measuring system, this
When displacement platform moving distance and pressure difference there are linear relationship, by data analysis it can be concluded that the number of testing pressure difference
It is worth size.
The internal diameter of elastic metallic bellows used in the present embodiment is 50mm, height 100mm.4 length of optical patchcord is
3m, it is contemplated that the mobile effective distance of scanning shift platform 6 is 0.2m, therefore the Design of length of wire jumper 5 is 2.9m.Optical fiber differential pressure sensing
Optical fiber self-focusing lens inside device 8 is separately fixed at the same position of the fixed device 10 of two optical fiber self-focusings, guarantees that two is saturating
Mirror mirror surface height is identical, and tail end connects fiber adapter 9 respectively.Silver-plated plane mirror is pasted onto reflecting mirror by silicon rubber and fixes
On device 11, and it is silver-plated face-up.
Step 2: beam path alignment.Device 10 is fixed by adjusting Reflecting mirror fixing device 11 and optical fiber self-focusing lens
Angle modulation screw ensures that plane reflection mirror surface is horizontal and identical, self-focusing lens the mirror surface of height is horizontal and identical, the light of height
Vertical exit is to mirror surface center and former road is reflected back self-focusing lens.By adjusting the first self-focusing on scanning shift platform 6
The angle of lens 71 and the second self-focusing lens 72 guarantees substantially completely to be incident on the from the emergent light of the first self-focusing lens 71
In two self-focusing lens 72.
Step 3: measurement initialization.Second self-focusing lens 72 of optical fiber is fixed on 6 one end of scanning shift platform, and adjustment is swept
The position of the first self-focusing lens 71 on displacement platform 6 is retouched until showing the center pole of white-light fringe in photodetector
Big value records the position of the first self-focusing lens 71 at this time and is demarcated as zero.
Step 4: sensor measurement is tested.It will be one in threeway rubber tube one end and optical fiber differential pressure pickup 8 in the present embodiment
A conduit 181 is connected, and the other both ends of threeway rubber tube connect the air gauge of pressurised airbag and market purchase respectively, and optical fiber differential pressure passes
Another conduit 182 of sensor is communicated with atmospheric pressure.It gradually pressurizes after opening scanning shift platform 6, record occurs in white-light fringe
The position of first self-focusing lens 71 and corresponding pressure when heart primary maximum.Threeway rubber tube is connected to conduit 182, conduit 181
Logical atmospheric pressure repeats to obtain Fig. 6 after testing again.
In conclusion push-pull type optical fiber differential pressure pickup described in the utility model, has the advantage that
1) a kind of push-pull type optical fiber differential pressure pickup described in the utility model, it is active to be separated from each other design with passive device
It can work under the adverse circumstances such as strong electromagnetic, inflammable and explosive.
2) a kind of push-pull type optical fiber differential pressure pickup described in the utility model, elastic metallic ripple used in sensor
Pipe can be replaced according to actual needs, realize that measurement range and sensitivity are adjustable.
3) a kind of push-pull type optical fiber differential pressure pickup described in the utility model, it is low in cost, performance is stable, is easily changed
And maintenance.
Further, in use:
4) a kind of push-pull type optical fiber differential pressure pickup described in the utility model, multiple sensors can be used in conjunction with a set of width
Spectroscopic light source, photodetector realize the quasi- distribution measuring of multiple spot.
5) a kind of push-pull type optical fiber differential pressure pickup described in the utility model, the space of wide spectrum optical passes on scanning shift platform
It is defeated to bring temperature error, but its space propagation distance does not exceed 15cm, so temperature bring error can be ignored.
6) a kind of push-pull type optical fiber differential pressure pickup described in the utility model can form telemetering with fibre-optic transmission system (FOTS)
Network realizes remote real time monitoring and measurement.
Specifically, the fixed device 11 of the plane mirror includes stud 111, angle modulation screw 112, rubber ring 113, plane
Reflecting mirror 114 and upper mounting plate 115 and lower installation board；
The top of upper mounting plate is arranged in the stud 111；The rubber ring 113 is arranged in upper mounting plate and lower installation board
Between；
For the ease of the adjusting of 114 angle of plane mirror, while simplifying structure, further, the upper mounting plate 115
On be provided with transverse groove 116；Two angle modulation screws 112 are provided on the upper mounting plate 115, two angle modulation screws 112 are distinguished
Positioned at the two sides of stud 111；Wherein an angle modulation screw 112 is extended in lower installation board by the insertion of upper mounting plate 115, and under
Mounting plate is threadedly engaged；One end of another angle modulation screw 112 is inserted into mounting plate by transverse groove 116, and with lower installation
Plate is threadedly engaged；The plane mirror 114 is mounted on the bottom surface of lower installation board.
For the ease of the adjusting of 101 angle of optical fiber self-focusing lens, while simplifying structure, further, the optical fiber
The fixed device 10 of self-focusing lens includes optical fiber self-focusing lens 101, the second angle modulation screw 103, the second rubber ring 104, fixes
Seat 105；Condenser lens mounting base is provided in the fixing seat 105, second rubber ring 104 is located at fixing seat 105 and gathers
Between focus lens mounting base, the optical fiber self-focusing lens 101 is mounted on condenser lens mounting base upper end, the condenser lens peace
Dress seat tool has flange；The second angle modulation screw 103 is arranged on flange, and at least has three；The second angle modulation screw
103 one end sequentially passes through flange, the second rubber ring 104 is inserted into fixing seat 105, and is threadedly engaged with fixing seat 105.
For the ease of the installation and replacement of optical fiber self-focusing lens 101, further, set in the condenser lens mounting base
It is equipped with installation base, is set with installation set on the installation base；Fastening screw 102 is provided in the installation set；The light
Fine self-focusing lens 101 is mounted at the top of installation base.
Claims (4)
1. push-pull type optical fiber differential pressure pickup, it is characterised in that: including fiber adapter (9), the fixed dress of optical fiber self-focusing lens
Set (10), plane mirror fixed device (11), support column (12), equalizer bar (13), driving column (14), encapsulating shell (15), bullet
Property metal bellows (16), ring flange (17), logical pressure conduit (18)；
The encapsulating shell (15) has inner cavity；Top of fiber adapter (9) setting in encapsulating shell (15)；The optical fiber is certainly
Top of condenser lens fixed device (10) setting in encapsulating shell (15) inner cavity；The fiber adapter (9) and optical fiber self-focusing
Lens fixing device (10) is connected by optical fiber；The support column (12) is vertically provided at the interior intracavitary of encapsulating shell (15), and institute
The lower end for stating support column (12) is located at the middle position of inner cavity lower surface；The upper end of the support column (12) is provided with equalizer bar
(13), the middle position Yu support column (12) of the equalizer bar (13) are hinged；
The two sides of the support column (12) are provided with elastic metallic bellows (16)；At the top of the elastic metallic bellows (16)
It is provided with driving column (14), the upper end of the driving column (14) is connect with one end of equalizer bar (13)；The driving column (14)
It is fixed device (11) that upper end is provided with plane mirror；The plane mirror fixed device (11) is located at optical fiber self-focusing lens
The underface of fixed device (10)；
Elastic metallic bellows (16) bottom is fixed on inner cavity lower surface by ring flange (17)；The elastic metallic ripple
Pipe (16) bottom is provided with logical pressure conduit (18).
2. push-pull type optical fiber differential pressure pickup as described in claim 1, it is characterised in that: the fixed device of the plane mirror
It (11) include stud (111), angle modulation screw (112), rubber ring (113), plane mirror (114) and upper mounting plate (115)
And lower installation board；
The top of upper mounting plate is arranged in the stud (111)；The rubber ring (113) is arranged in upper mounting plate and lower installation board
Between；
Transverse groove (116) are provided on the upper mounting plate (115)；Two angle modulation spiral shells are provided on the upper mounting plate (115)
Silk (112), two angle modulation screws (112) are located at the two sides of stud (111)；Wherein angle modulation screw (112) You Shangan
Loading board (115) insertion extends in lower installation board, and is threadedly engaged with lower installation board；One end of another angle modulation screw (112)
It is inserted into mounting plate by transverse groove (116), and is threadedly engaged with lower installation board；The plane mirror (114) is mounted on
The bottom surface of lower installation board.
3. push-pull type optical fiber differential pressure pickup as described in claim 1, it is characterised in that: the optical fiber self-focusing lens is solid
Determining device (10) includes optical fiber self-focusing lens (101), the second angle modulation screw (103), the second rubber ring (104), fixing seat
(105)；Condenser lens mounting base is provided on the fixing seat (105), second rubber ring (104) is located at fixing seat
(105) between condenser lens mounting base, the optical fiber self-focusing lens (101) is mounted on condenser lens mounting base upper end, institute
Condenser lens mounting base is stated with flange；The second angle modulation screw (103) is arranged on flange, and at least has three；Institute
The one end for stating the second angle modulation screw (103) sequentially passes through flange, the second rubber ring (104) is inserted into fixing seat (105), and with
Fixing seat (105) is threadedly engaged.
4. push-pull type optical fiber differential pressure pickup as claimed in claim 3, it is characterised in that: set in the condenser lens mounting base
It is equipped with installation base, is set with installation set on the installation base；Fastening screw (102) are provided in the installation set；It is described
Optical fiber self-focusing lens (101) is mounted at the top of installation base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821230972.XU CN208860519U (en) | 2018-08-01 | 2018-08-01 | Push-Pull Fiber Optic Differential Pressure Sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821230972.XU CN208860519U (en) | 2018-08-01 | 2018-08-01 | Push-Pull Fiber Optic Differential Pressure Sensor |
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| Publication Number | Publication Date |
|---|---|
| CN208860519U true CN208860519U (en) | 2019-05-14 |
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| CN201821230972.XU Active CN208860519U (en) | 2018-08-01 | 2018-08-01 | Push-Pull Fiber Optic Differential Pressure Sensor |
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| CN (1) | CN208860519U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663158A (en) * | 2018-08-01 | 2018-10-16 | 桂林电子科技大学 | Push-pull type optical fiber differential pressure pickup |
| CN112902921A (en) * | 2021-01-26 | 2021-06-04 | 哈尔滨工程大学 | Force balance push-pull type optical fiber two-dimensional inclination measuring device |
-
2018
- 2018-08-01 CN CN201821230972.XU patent/CN208860519U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663158A (en) * | 2018-08-01 | 2018-10-16 | 桂林电子科技大学 | Push-pull type optical fiber differential pressure pickup |
| CN108663158B (en) * | 2018-08-01 | 2024-05-28 | 桂林电子科技大学 | Push-pull type optical fiber differential pressure sensor |
| CN112902921A (en) * | 2021-01-26 | 2021-06-04 | 哈尔滨工程大学 | Force balance push-pull type optical fiber two-dimensional inclination measuring device |
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