CN108225448A - A kind of fiber F-P many reference amounts Intelligent Flowing Sensor and measuring method - Google Patents
A kind of fiber F-P many reference amounts Intelligent Flowing Sensor and measuring method Download PDFInfo
- Publication number
- CN108225448A CN108225448A CN201810196356.5A CN201810196356A CN108225448A CN 108225448 A CN108225448 A CN 108225448A CN 201810196356 A CN201810196356 A CN 201810196356A CN 108225448 A CN108225448 A CN 108225448A
- Authority
- CN
- China
- Prior art keywords
- fiber
- probe
- pressure
- optical fiber
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The present invention relates to a kind of optical fiber F P many reference amounts Intelligent Flowing Sensors and measuring methods, it includes cylindrical probe pedestal, the cylindrical probe base interior is equipped with the first optical fiber F P pressure probes, the second optical fiber F P pressure probes, third optical fiber F P pressure probes and various surgical grade stainless steels, the cylindrical probe pedestal is connected by optical cable with modulation /demodulation module, and modulation /demodulation module communication interface is provided in the modulation /demodulation module.For the shortcomings of of high cost present in prior art, volume is big, installation is difficult, precision is low, low-response, the present invention proposes a kind of optical fiber F P many reference amounts Intelligent Flowing Sensor schemes, 4 flow velocity, flow direction, pressure and temperature parameters of pipeline fluid are measured simultaneously, above-mentioned 4 parameters are extracted by modulation-demodulation device mutually to assist correcting, optimization calculates, it realizes minimizing, is intelligent, being integrated and practical in high precision for flow sensor, holds the trend of Sensor Technology Development.
Description
Technical field
The present invention relates to a kind of flow sensors, and in particular to a kind of fiber F-P (Fabry-Perot, Fabry-amber
Sieve) many reference amounts Intelligent Flowing Sensor and measuring method.
Background technology
The fast development of modern science and technology makes human society change from intense industrialization to informationization.Its marrow is
The motion of matter of optimization physical world and the productive consumption activity of energy movement and human society are converted by information, is provided more
The products ＆ services of high-quality so that production process and process of consumption are more efficient, more intelligently, so as to promote economic society
Digitlization transition.Sensor is the window of perception, acquisition, detection and transitional information, is the major technique for realizing the information age
Basis becomes one of commanding elevation that 21 century people fight in terms of hi-tech development, and countries nowadays are all by sensor technology
It is considered as the key of modern high technology development.
Pipeline flow measurement is one important application of industrial circle, be primarily present currently on the market it is mechanical, heat-conducted,
The flow sensor of the different principles such as electromagnetic type, ultrasonic type.But existing flow measurement solution there are it is different the shortcomings that,
Middle mechanical flow switch measurement accuracy is not high, and the heat-conducted flow sensor service life is shorter, high failure rate, responds slower, electromagnetism
Formula and the manufacture of ultrasonic type flow sensor are with high costs, the larger installation of sensor bulk is inconvenient, O＆M cost is high.
It is developed rapidly as the relevant technologies such as optical-fibre communications and Fibre Optical Sensor develop, optical fiber sensing technology is because of its sensitivity
Height, high resolution, small, light-weight, high temperature resistant, anticorrosive, electromagnetism interference and can be reliable under inflammable and explosive environment
The technical advantages such as work are shown one's talent, and become research hotspot.
Current common phase modulation-type optic flow sensor has Michelson (Michelson) interference-type (see patent
CN 106483329) and Fabry-Perot (Fabry-Perot) interference-type flow sensor.Michelson (Michelson)
Optical fiber used in interference-type optical fiber flow sensor is more, makes, use and installation accuracy require very high, palpus two light of strict guarantee
The intensity of beam is equal and two channels experience same environment and do not experience same strain, and actual installation precision, which is difficult to control, leads to this
Type sensor measures unstable, by environment to being affected, limits the application of the type sensor.F-P type optical fiber streams
Quantity sensor detected using simple optical fiber, using beam interference it is measured, avoid double joint optical fiber matching the problem of, structure
Simply, small, easy for installation, high reliability is highly sensitive, quick response.
Invention content
In industry spot practical application, while measuring pipeline flow, the information such as manifold pressure and temperature are also often
Need the parameter paid close attention to.For of high cost present in prior art, volume is big, installation hardly possible, the low, low-response of precision etc. are scarce
Point, the present invention propose a kind of fiber F-P many reference amounts Intelligent Flowing Sensor scheme, while measure the flow velocity of pipeline fluid, stream
To, 4 parameters of pressure and temperature, above-mentioned 4 parameters are extracted by modulation-demodulation device and mutually assist correcting, optimization calculates, real
Minimizing, is intelligent, being integrated and practical in high precision for existing flow sensor, holds the trend of Sensor Technology Development.
In order to solve the above-mentioned technical problem, the present invention proposes following technical scheme：A kind of fiber F-P many reference amounts intelligent flow
Sensor, it include cylindrical probe pedestal, the cylindrical probe base interior be equipped with the first fiber F-P pressure probe,
Second fiber F-P pressure probe, third fiber F-P pressure probe and various surgical grade stainless steels, the cylindrical probe pedestal pass through
Optical cable is connected with modulation /demodulation module, and modulation /demodulation module communication interface is provided in the modulation /demodulation module.
The first fiber F-P pressure probe and third fiber F-P pressure probe are arranged on cylindrical probe pedestal both sides
It is arranged symmetrically；The second fiber F-P pressure probe and various surgical grade stainless steels are arranged on the top of cylindrical probe pedestal,
In the second fiber F-P pressure probe be located at top center.
First sensor probe optical fiber interface is provided on the cylindrical probe pedestal, second sensor probe optical fiber connects
Mouth, 3rd sensor probe optical fiber interface and the 4th sensor probe optical fiber interface；The first sensor probe optical fiber interface
It is connected by optical fiber with the first fiber F-P pressure probe；The second sensor probe optical fiber interface passes through optical fiber and the second light
Fine F-P pressure probes are connected；The 3rd sensor probe optical fiber interface passes through optical fiber and third fiber F-P pressure probe phase
Even；The 4th sensor probe optical fiber interface is connected by optical fiber with various surgical grade stainless steels；In the tail of cylindrical probe pedestal
Portion's outer rim is provided with connection external screw thread, and the connection screw thread is connected with the shell of modulation /demodulation module by screw thread.
The first modulation /demodulation module optical fiber interface, the second modulation /demodulation module optical fiber are provided in the modulation /demodulation module
Interface, third modulation /demodulation module optical fiber interface and the 4th modulation /demodulation module optical fiber interface；The first modulation /demodulation module
Optical fiber interface is directly connected by optical cable with the first sensor probe optical fiber interface of cylindrical probe pedestal；Second modulation
Demodulation module optical fiber interface is directly connected by optical cable with the second sensor probe optical fiber interface of cylindrical probe pedestal；It is described
Third modulation /demodulation module optical fiber interface directly passes through the 3rd sensor of optical cable and cylindrical probe pedestal probe optical fiber interface
It is connected；The 4th modulation /demodulation module optical fiber interface directly passes through optical cable and the 4th sensor probe of cylindrical probe pedestal
Optical fiber interface is connected.
One end that the cylindrical probe pedestal includes four probes is mounted on inside the horizontal pipe containing bidirectional fluid
Or inside the vertical pipeline of bidirectional fluid.
The modulation /demodulation inside modules are provided with computation analysis module.
The measuring method of the fiber F-P many reference amounts Intelligent Flowing Sensor：
Step1：According to bernoulli principle and volume flow conservation principle, i.e. perfect fluid does the steady motion of a fluid in same flow tube
When dynamic, at the different cross section of same flow tube, the sum of the kinetic energy of per unit volume fluid, enabled, pressure are a constant, volume flow
It is equal, establish following expression：
Bernoulli principle：
Volume flow conservation principle：
Sv=B (02)
In formula：Every to represent unit hydrostatic pressure energy, kinetic energy, potential energy respectively, P is the static pressure that certain in fluid is put, and v is should
The fluid flow rate of point, h are gravity elevation of this away from liquid level, and ρ is the density of fluid, and S is accumulated for this pipeline radial section, A, B
All it is constant；
Step2：Set the first fiber F-P pressure probe, the second fiber F-P pressure probe, third fiber F-P pressure probe
The static pressure that different location measures at same fluids within pipes three is respectively P1、P2、P3, flow velocity is respectively v1、v2、v3, potential energy point
It Wei not ρ gh1、ρgh2、ρgh3, according to Bernoulli equation, there is following equation to set up：
Step3：It is smaller in view of sensor bulk, the first fiber F-P pressure probe, the second fiber F-P pressure probe,
Potential energy difference caused by three fiber F-P pressure probe three position differences can be neglected, therefore (03) formula is reduced to：
Step4：When fluid flow direction be from the first fiber F-P pressure probe to third fiber F-P pressure probe, then by
The flow velocity v at cylinder probe choked flow effect, the first fiber F-P pressure probe1=0, flow velocity at the second fiber F-P pressure probe
As fluids within pipes flow velocity；According to (02) formula flow conservation principle, it is known that fluid stream is backward at third fiber F-P pressure probe
Flow velocity v3Less than v2, it is derived by by (04) formula：
v2＞ v3＞ v1=0 (05)
P1＞ P3＞ P2 (06)
Step5：When fluid flow direction be from third fiber F-P pressure probe to the first fiber F-P pressure probe, then by
The flow velocity v at cylinder probe choked flow effect, third fiber F-P pressure probe3=0, flow velocity at the second fiber F-P pressure probe
As fluids within pipes flow velocity；According to (02) formula flow conservation principle, it is known that fluid stream is backward at the first fiber F-P pressure probe
Flow velocity v1Less than v2, it is derived by by (04) formula：
v2＞ v1＞ v3=0 (08)
P3＞ P1＞ P2 (09)
Step6：Pass through the first fiber F-P pressure probe, the second fiber F-P pressure probe, third fiber F-P pressure probe
The pressure data P that three measures1、P2、P3, you can flow velocity v and flow direction in pipeline is calculated：
Work as P1=P2=P3, then v=0, fluids within pipes do not flow；
Work as P1>P3>P2, thenThird fiber F-P pressure is flowed to from the first fiber F-P pressure probe to visit
Head；
Work as P3>P1>P2, thenThe first fiber F-P pressure is flowed to from third fiber F-P pressure probe to visit
Head；
Step7：After calculating fluid flow rate size and Orientation, many reference amounts of flow velocity size and fluid temperature (F.T.) can be exported outward
Digital signal by setting definite value, can also export the on-off model of a pair of of normally-open normally-close contact after flow velocity is more than definite value, with
For the needs under different industrial applications.
The method have the advantages that：
1st, it is apparent that a kind of fiber F-P many reference amounts Intelligent Flowing Sensor advantage is addressed in the present invention, based on F-P fibre-optical probes
It is made, small, precision is high, easy for installation, can monitor bidirectional fluid, and suitable for horizontal direction and vertical direction pipeline.
2nd, the various surgical grade stainless steels of integral measuring temperature provide temperature parameters, and available for correcting pressure measurement errors, lead to
Cross mating modulation /demodulation connection device, be made integral type or split type flow sensor, output flow, flow to digital quantity signal or
On-off model.
3rd, modulation /demodulation module is received and is demodulated from three fiber F-P pressure probe signals, demodulates institute's pressure measurement respectively
Power numerical value P1、P2、P3Analysis and distinguishing is carried out by counting circuit, according to P1、P2、P3Three's numerical values recited carries out computational discrimination flow direction
And flow velocity.
4th, after the present invention calculates fluid flow rate size and Orientation, more ginsengs of flow velocity size and fluid temperature (F.T.) can be exported outward
Digital signal is measured, the on-off model of a pair of of normally-open normally-close contact by setting definite value, can be also exported after flow velocity is more than definite value,
For the needs under different industrial applications.
5th, the difference under level/vertical direction pipeline operating mode flows to fluid flow rate measurement process.Lower of horizontal pipe operating mode
Sensor is adapted for mount to pipeline side, is totally submerged in fluid convenient for probe.Under level/vertical pipeline operating mode, can it survey
Two-way flow velocity is measured, it is more accurate that full packages is measured.Simple in structure, easy for installation, probe impact resistance, corrosion-resistant is applied widely
It is general.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the cylindrical probe pedestal front view of the present invention.
Fig. 2 is the cylindrical probe pedestal vertical view of the present invention.
Fig. 3 is the integral type flow sensor Integral connection structure schematic diagram of the present invention.
Fig. 4 is the split type flow sensor Integral connection structure schematic diagram of the present invention.
Fig. 5 is that sensor of the invention is used for the structure diagram that horizontal pipe measures.
Fig. 6 is that sensor of the invention is used for the structure diagram that vertical pipeline measures.
Fig. 7 is the fiber F-P many reference amounts Intelligent Flowing Sensor operation principle of the present invention.
In figure：First fiber F-P pressure probe 1, the second fiber F-P pressure probe 2, third fiber F-P pressure probe 3,
Various surgical grade stainless steels 4, cylindrical probe pedestal 5, optical cable 6, modulation /demodulation module 7, modulation /demodulation module communication interface 8；
First sensor probe optical fiber interface 5-1, second sensor probe optical fiber interface 5-2,3rd sensor probe light
Fine interface 5-3, the 4th sensor probe optical fiber interface 5-4, connection screw thread 5-5；
First modulation /demodulation module optical fiber interface 7-1, the second modulation /demodulation module optical fiber interface 7-2, third modulation /demodulation
Module optical fiber interface 7-3, the 4th modulation /demodulation module optical fiber interface 7-4.
Specific embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
Embodiment 1：
Such as Fig. 1-4, a kind of fiber F-P many reference amounts Intelligent Flowing Sensor, it includes cylindrical probe pedestal 5, the circle
First fiber F-P pressure probe 1, the second fiber F-P pressure probe 2, third fiber F-P are installed inside cylinder probe pedestal 5
Pressure probe 3 and various surgical grade stainless steels 4, the cylindrical probe pedestal 5 is connected by optical cable 6 with modulation /demodulation module 7, described
Modulation /demodulation module communication interface 8 is provided in modulation /demodulation module 7.
Further, the fiber F-P many reference amounts Intelligent Flowing Sensor can design according to actual needs it is integrated and
Split type two kinds of forms, for integral sensor convenient for now distributed controll, split type sensor is convenient for Signal Terminal centralized and unified
Management.Split type fiber F-P many reference amounts Intelligent Flowing Sensor is by sensor probe cylindrical base 5 and modulation /demodulation module 7
It is connected directly, reduces intermediate fibres interface and connection optical cable.
Further, the first fiber F-P pressure probe 1 and third fiber F-P pressure probe 3 are arranged on cylindrical spy
5 both sides of head pedestal are arranged symmetrically；The second fiber F-P pressure probe 2 and various surgical grade stainless steels 4 are arranged on cylindrical probe
The top of pedestal 5, wherein the second fiber F-P pressure probe 2 is located at top center.
Further, first sensor probe optical fiber interface 5-1, the second biography are provided on the cylindrical probe pedestal 5
Sensor probe optical fiber interface 5-2,3rd sensor probe optical fiber interface 5-3 and the 4th sensor probe optical fiber interface 5-4；It is described
First sensor probe optical fiber interface 5-1 is connected by optical fiber with the first fiber F-P pressure probe 1；The second sensor is visited
Head optical fiber interface 5-2 is connected by optical fiber with the second fiber F-P pressure probe 2；The 3rd sensor probe optical fiber interface 5-3
It is connected by optical fiber with third fiber F-P pressure probe 3；The 4th sensor probe optical fiber interface 5-4 passes through optical fiber and light
Fine temp probe 4 is connected；The trailing outer edges of cylindrical probe pedestal 5 are provided with connection external screw thread 5-5, the connection screw thread 5-
5 are connected with the shell of modulation /demodulation module 7 by screw thread.
Further, the first modulation /demodulation module optical fiber interface 7-1, the second tune are provided in the modulation /demodulation module 7
Demodulation module optical fiber interface 7-2 processed, third modulation /demodulation module optical fiber interface 7-3 and the 4th modulation /demodulation module optical fiber interface 7-
4；The first modulation /demodulation module optical fiber interface 7-1 is directly visited by the first sensor of optical cable and cylindrical probe pedestal 5
Head optical fiber interface 5-1 is connected；The second modulation /demodulation module optical fiber interface 7-2 directly passes through optical cable and cylindrical probe pedestal
5 second sensor probe optical fiber interface 5-2 is connected；The third modulation /demodulation module optical fiber interface 7-3 directly passes through optical cable
It is connected with the 3rd sensor probe optical fiber interface 5-3 of cylindrical probe pedestal 5；The 4th modulation /demodulation module optical fiber interface
7-4 is directly connected by optical cable with the 4th sensor probe optical fiber interface 5-4 of cylindrical probe pedestal 5.
Further, one end that the cylindrical probe pedestal 5 includes four probes is mounted on the water containing bidirectional fluid
Inside flat pipeline or inside the vertical pipeline of bidirectional fluid.And then easily realize that pipeline flow laterally or vertically is surveyed
Amount.
Further, the modulation /demodulation module 7 is internally provided with computation analysis module.Pass through the modulatedemodulate mode transfer
Block 7 can will be received from the first fiber F-P pressure probe 1, the second fiber F-P pressure probe 2, third fiber F-P pressure
Power is popped one's head in 3 three pressure probe signals；Temperature parameter can be used for assisting correcting pressure parameter as needed, also can be separately as
Fluid temperature (F.T.) parameter.
Embodiment 2：
Such as Fig. 5-7, the measuring method of the fiber F-P many reference amounts Intelligent Flowing Sensor：
Step1：According to bernoulli principle and volume flow conservation principle, i.e. perfect fluid does the steady motion of a fluid in same flow tube
When dynamic, at the different cross section of same flow tube, the sum of the kinetic energy of per unit volume fluid, enabled, pressure are a constant, volume flow
It is equal, establish following expression：
Bernoulli principle：
Volume flow conservation principle：
Sv=B (02)
In formula：Every to represent unit hydrostatic pressure energy, kinetic energy, potential energy respectively, P is the static pressure that certain in fluid is put, and v is should
The fluid flow rate of point, h are gravity elevation of this away from liquid level, and ρ is the density of fluid, and S is accumulated for this pipeline radial section, A, B
All it is constant；
Step2：The first fiber F-P pressure probe 1, the second fiber F-P pressure probe 2, third fiber F-P pressure is set to visit
The static pressure that different location measures at first 3 same fluids within pipes three is respectively P1、P2、P3, flow velocity is respectively v1、v2、v3, potential energy
Respectively ρ gh1、ρgh2、ρgh3, according to Bernoulli equation, there is following equation to set up：
Step3：It is smaller in view of sensor bulk, the first fiber F-P pressure probe 1, the second fiber F-P pressure probe 2,
Potential energy difference caused by 3 three position difference of third fiber F-P pressure probe can be neglected, therefore (03) formula is reduced to：
Step4：When fluid flow direction is from the first fiber F-P pressure probe 1 to third fiber F-P pressure probe 3, then
Since cylinder is popped one's head in choked flow effect, flow velocity v at the first fiber F-P pressure probe 11=0, at the second fiber F-P pressure probe 2
Flow velocity is fluids within pipes flow velocity；According to (02) formula flow conservation principle, it is known that fluid stream backward visit by third fiber F-P pressure
Flow velocity v at first 33Less than v2, it is derived by by (04) formula：
v2＞ v3＞ v1=0 (05)
P1＞ P3＞ P2 (06)
Step5：When fluid flow direction is from third fiber F-P pressure probe 3 to the first fiber F-P pressure probe 1, then
Since cylinder is popped one's head in choked flow effect, flow velocity v at third fiber F-P pressure probe 33=0, at the second fiber F-P pressure probe 2
Flow velocity is fluids within pipes flow velocity；According to (02) formula flow conservation principle, it is known that fluid stream backward visit by the first fiber F-P pressure
Flow velocity v at first 11Less than v2, it is derived by by (04) formula：
v2＞ v1＞ v3=0 (08)
P3＞ P1＞ P2 (09)
Step6：It is visited by the first fiber F-P pressure probe 1, the second fiber F-P pressure probe 2, third fiber F-P pressure
The pressure data P that first 3 three measures1、P2、P3, you can flow velocity v and flow direction in pipeline is calculated：
Work as P1=P2=P3, then v=0, fluids within pipes do not flow；
Work as P1>P3>P2, thenThird fiber F-P pressure is flowed to from the first fiber F-P pressure probe 1 to visit
First 3；
Work as P3>P1>P2, thenThe first fiber F-P pressure is flowed to from third fiber F-P pressure probe 3 to visit
First 1；
Step7：After calculating fluid flow rate size and Orientation, many reference amounts of flow velocity size and fluid temperature (F.T.) can be exported outward
Digital signal by setting definite value, can also export the on-off model of a pair of of normally-open normally-close contact after flow velocity is more than definite value, with
For the needs under different industrial applications.
By above-mentioned description, those skilled in the art completely can be in the model without departing from this invention technological thought
In enclosing, various changes and amendments are carried out all within protection scope of the present invention.The unaccomplished matter of the present invention, belongs to ability
The common knowledge of field technique personnel.
Claims (7)
1. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor, it is characterised in that：It includes cylindrical probe pedestal (5), described
The first fiber F-P pressure probe (1), the second fiber F-P pressure probe (2), third are installed inside cylindrical probe pedestal (5)
Fiber F-P pressure probe (3) and various surgical grade stainless steels (4), the cylindrical probe pedestal (5) pass through optical cable (6) and modulatedemodulate
Mode transfer block (7) is connected, and modulation /demodulation module communication interface (8) is provided on the modulation /demodulation module (7).
2. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor according to claim 1, it is characterised in that：Described first
Fiber F-P pressure probe (1) and third fiber F-P pressure probe (3) are arranged on cylindrical probe pedestal (5) both sides in symmetrical cloth
It puts；The second fiber F-P pressure probe (2) and various surgical grade stainless steels (4) are arranged on the top of cylindrical probe pedestal (5),
Wherein the second fiber F-P pressure probe (2) is positioned at top center.
3. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor according to claim 1, it is characterised in that：The cylinder
Be provided on shape probe base (5) first sensor probe optical fiber interface (5-1), second sensor probe optical fiber interface (5-2),
3rd sensor probe optical fiber interface (5-3) and the 4th sensor probe optical fiber interface (5-4)；The first sensor probe light
Fine interface (5-1) is connected by optical fiber with the first fiber F-P pressure probe (1)；The second sensor probe optical fiber interface (5-
2) it is connected by optical fiber with the second fiber F-P pressure probe (2)；The 3rd sensor probe optical fiber interface (5-3) passes through light
Fibre is connected with third fiber F-P pressure probe (3)；The 4th sensor probe optical fiber interface (5-4) passes through optical fiber and optical fiber
Temp probe (4) is connected；The trailing outer edges of cylindrical probe pedestal (5) are provided with connection external screw thread (5-5), the connection spiral shell
Line (5-5) is connected with the shell of modulation /demodulation module (7) by screw thread.
4. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor according to claim 1, it is characterised in that：The modulation
The first modulation /demodulation module optical fiber interface (7-1), the second modulation /demodulation module optical fiber interface (7- are provided on demodulation module (7)
2), third modulation /demodulation module optical fiber interface (7-3) and the 4th modulation /demodulation module optical fiber interface (7-4)；First modulation
Demodulation module optical fiber interface (7-1) directly passes through the first sensor of optical cable and cylindrical probe pedestal (5) probe optical fiber interface
(5-1) is connected；The second modulation /demodulation module optical fiber interface (7-2) directly passes through optical cable and cylindrical probe pedestal (5)
Second sensor probe optical fiber interface (5-2) is connected；The third modulation /demodulation module optical fiber interface (7-3) directly passes through optical cable
It is connected with the 3rd sensor probe optical fiber interface (5-3) of cylindrical probe pedestal (5)；The 4th modulation /demodulation module optical fiber
Interface (7-4) is directly connected by optical cable with the 4th sensor probe optical fiber interface (5-4) of cylindrical probe pedestal (5).
5. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor according to claim 1, it is characterised in that：The cylinder
The one end of shape probe base (5) comprising four probes is mounted on inside horizontal pipe containing bidirectional fluid or bidirectional fluid
Inside vertical pipeline.
6. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor according to claim 1, it is characterised in that：The modulation
Demodulation module (7) is internally provided with computation analysis module.
7. the measuring method of fiber F-P many reference amounts Intelligent Flowing Sensor, feature exist described in claim 1-6 any one
In：
Step1：According to bernoulli principle and volume flow conservation principle, i.e. perfect fluid does Steady Flow in same flow tube
When, at the different cross section of same flow tube, the sum of the kinetic energy of per unit volume fluid, enabled, pressure are a constant, volume flow phase
Deng establishing following expression：
Bernoulli principle：
Volume flow conservation principle：
Sv=B (02)
In formula：Every to represent unit hydrostatic pressure energy, kinetic energy, potential energy respectively, P is the static pressure that certain in fluid is put, and v is the point
Fluid flow rate, h are gravity elevation of this away from liquid level, and ρ is the density of fluid, and S is accumulated for this pipeline radial section, and A, B are
Constant；
Step2：The first fiber F-P pressure probe (1), the second fiber F-P pressure probe (2), third fiber F-P pressure is set to visit
The static pressure that different location measures at head (3) same fluids within pipes three is respectively P1、P2、P3, flow velocity is respectively v1、v2、v3, position
Can be respectively ρ gh1、ρgh2、ρgh3, according to Bernoulli equation, there is following equation to set up：
Step3：It is smaller in view of sensor bulk, the first fiber F-P pressure probe (1), the second fiber F-P pressure probe (2),
Potential energy difference caused by the difference of third fiber F-P pressure probe (3) three position can be neglected, therefore (03) formula is reduced to：
Step4：When fluid flow direction is from the first fiber F-P pressure probe (1) to third fiber F-P pressure probe (3), then
Since cylinder is popped one's head in choked flow effect, flow velocity v at the first fiber F-P pressure probe (1)1=0, the second fiber F-P pressure probe
(2) flow velocity is fluids within pipes flow velocity at；According to (02) formula flow conservation principle, it is known that fluid stream third fiber F-P backward
Flow velocity v at pressure probe (3)3Less than v2, it is derived by by (04) formula：
v2＞ v3＞ v1=0 (05)
P1＞ P3＞ P2 (06)
Step5：When fluid flow direction is from third fiber F-P pressure probe (3) to the first fiber F-P pressure probe (1), then
Since cylinder is popped one's head in choked flow effect, flow velocity v at third fiber F-P pressure probe (3)3=0, the second fiber F-P pressure probe
(2) flow velocity is fluids within pipes flow velocity at；According to (02) formula flow conservation principle, it is known that fluid stream the first fiber F-P backward
Flow velocity v at pressure probe (1)1Less than v2, it is derived by by (04) formula：
v2＞ v1＞ v3=0 (08)
P3＞ P1＞ P2 (09)
Step6：It is visited by the first fiber F-P pressure probe (1), the second fiber F-P pressure probe (2), third fiber F-P pressure
The pressure data P that head (3) three measures1、P2、P3, you can flow velocity v and flow direction in pipeline is calculated：
Work as P1=P2=P3, then v=0, fluids within pipes do not flow；
Work as P1>P3>P2, thenThird fiber F-P pressure probe is flowed to from the first fiber F-P pressure probe (1)
(3)；
Work as P3>P1>P2, thenThe first fiber F-P pressure probe is flowed to from third fiber F-P pressure probe (3)
(1)；
Step7：After calculating fluid flow rate size and Orientation, many reference amounts number of flow velocity size and fluid temperature (F.T.) can be exported outward
Signal by setting definite value, can also export the on-off model of a pair of of normally-open normally-close contact, for not after flow velocity is more than definite value
With the needs under industrial applications.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810196356.5A CN108225448A (en) | 2018-03-09 | 2018-03-09 | A kind of fiber F-P many reference amounts Intelligent Flowing Sensor and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810196356.5A CN108225448A (en) | 2018-03-09 | 2018-03-09 | A kind of fiber F-P many reference amounts Intelligent Flowing Sensor and measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108225448A true CN108225448A (en) | 2018-06-29 |
Family
ID=62658306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810196356.5A Pending CN108225448A (en) | 2018-03-09 | 2018-03-09 | A kind of fiber F-P many reference amounts Intelligent Flowing Sensor and measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108225448A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624134A (en) * | 2020-07-03 | 2020-09-04 | 山东省科学院激光研究所 | Density sensor based on optical fiber F-P cavity |
| CN113447087A (en) * | 2021-06-25 | 2021-09-28 | 北京航空航天大学 | Flow measurement method based on dynamic optimization of three pressure sensors |
| CN113670391A (en) * | 2021-09-22 | 2021-11-19 | 北京奥特美克科技股份有限公司 | Intelligent flow measurement system and demodulation method for river channel and open channel |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985003855A1 (en) * | 1984-03-08 | 1985-09-12 | Optical Technologies, Inc. | Fluid flow sensing apparatus for in vivo and industrial applications emloying novel differential optical fiber pressure sensors |
| US5493512A (en) * | 1991-01-22 | 1996-02-20 | Centre National De La Recherche Scientifique (Cnrs) | Method and apparatus for measuring unsteady flow velocity |
| US20060060001A1 (en) * | 2004-09-22 | 2006-03-23 | Kurtz Anthony D | System and method for determining flow characteristics |
| US20100142880A1 (en) * | 2008-12-05 | 2010-06-10 | General Electric Company | Fiber optic sensing system |
| CN201858993U (en) * | 2009-09-28 | 2011-06-08 | Avl里斯脱有限公司 | Device for measuring flow quantity of double-directional unstable fluid flow |
| CN102279283A (en) * | 2010-06-10 | 2011-12-14 | 沃尔克工业电子有限公司 | Device for measuring fluid speed |
| EP2871448A1 (en) * | 2013-11-06 | 2015-05-13 | BAE Systems PLC | Conduit |
| CN207866303U (en) * | 2018-03-09 | 2018-09-14 | 中国长江电力股份有限公司 | A kind of fiber F-P many reference amounts Intelligent Flowing Sensor |
-
2018
- 2018-03-09 CN CN201810196356.5A patent/CN108225448A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985003855A1 (en) * | 1984-03-08 | 1985-09-12 | Optical Technologies, Inc. | Fluid flow sensing apparatus for in vivo and industrial applications emloying novel differential optical fiber pressure sensors |
| US5493512A (en) * | 1991-01-22 | 1996-02-20 | Centre National De La Recherche Scientifique (Cnrs) | Method and apparatus for measuring unsteady flow velocity |
| US20060060001A1 (en) * | 2004-09-22 | 2006-03-23 | Kurtz Anthony D | System and method for determining flow characteristics |
| US20100142880A1 (en) * | 2008-12-05 | 2010-06-10 | General Electric Company | Fiber optic sensing system |
| CN201858993U (en) * | 2009-09-28 | 2011-06-08 | Avl里斯脱有限公司 | Device for measuring flow quantity of double-directional unstable fluid flow |
| CN102279283A (en) * | 2010-06-10 | 2011-12-14 | 沃尔克工业电子有限公司 | Device for measuring fluid speed |
| EP2871448A1 (en) * | 2013-11-06 | 2015-05-13 | BAE Systems PLC | Conduit |
| CN207866303U (en) * | 2018-03-09 | 2018-09-14 | 中国长江电力股份有限公司 | A kind of fiber F-P many reference amounts Intelligent Flowing Sensor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624134A (en) * | 2020-07-03 | 2020-09-04 | 山东省科学院激光研究所 | Density sensor based on optical fiber F-P cavity |
| CN113447087A (en) * | 2021-06-25 | 2021-09-28 | 北京航空航天大学 | Flow measurement method based on dynamic optimization of three pressure sensors |
| CN113447087B (en) * | 2021-06-25 | 2022-08-23 | 北京航空航天大学 | Flow measurement method based on dynamic optimization of three pressure sensors |
| CN113670391A (en) * | 2021-09-22 | 2021-11-19 | 北京奥特美克科技股份有限公司 | Intelligent flow measurement system and demodulation method for river channel and open channel |
| CN113670391B (en) * | 2021-09-22 | 2024-02-09 | 北京奥特美克科技股份有限公司 | Intelligent flow measurement system and demodulation method for river channel and open channel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207866303U (en) | A kind of fiber F-P many reference amounts Intelligent Flowing Sensor | |
| CN108225448A (en) | A kind of fiber F-P many reference amounts Intelligent Flowing Sensor and measuring method | |
| CN105114052A (en) | Multiphase flow flowmeter in well and monitor method | |
| CN206146784U (en) | Tuning fork formula on -line densimeter | |
| CN103499706A (en) | Torsion balance type flow measuring apparatus and measuring method thereof | |
| CN103278535A (en) | Zeta electric potential real-time online detecting device of suspension colloid waste water | |
| CN107367313A (en) | Logging for measuring transformer oil conservater oil level | |
| CN1996003A (en) | On-line monitoring method for concentration rate of circulating cooling water | |
| CN208458836U (en) | A kind of liquid level detection system and liquid supply or recovery system | |
| CN104236644B (en) | Middle through-hole dynamic throttling element water meter | |
| CN204422012U (en) | Anticorrosion static-pressure type liquid level transmitter | |
| CN206074584U (en) | A kind of portable water quality detection sensor apparatus | |
| CN211085390U (en) | Water quantity collecting equipment | |
| CN202204545U (en) | Electromagnetic flowmeter | |
| CN104596612A (en) | Method and device for detecting liquid level and liquid capacity | |
| CN204920935U (en) | Heterogeneous class of flowmeter in pit | |
| CN204388957U (en) | A kind of fluid level transmitter | |
| CN208795326U (en) | A kind of general floating ball resistance type liquidometer | |
| CN214843438U (en) | Vortex street signal acquisition system | |
| CN104280076A (en) | High-precision large-diameter vortex flowmeter | |
| CN204202658U (en) | One possesses caliber high-precision flowmeter | |
| CN220751259U (en) | Electromagnetic flowmeter with novel structure | |
| CN202141665U (en) | Intelligent bus type differential pressure densimeter | |
| CN108731750A (en) | A kind of vortex-shedding meter | |
| CN215953278U (en) | Liquid density detection sensor and liquid density on-line monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |