CN106017586A - Flow metering device and method for paste conveying pipeline - Google Patents
Flow metering device and method for paste conveying pipeline Download PDFInfo
- Publication number
- CN106017586A CN106017586A CN201610559733.8A CN201610559733A CN106017586A CN 106017586 A CN106017586 A CN 106017586A CN 201610559733 A CN201610559733 A CN 201610559733A CN 106017586 A CN106017586 A CN 106017586A
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- Prior art keywords
- circuit
- mastic
- flow
- signal
- conveyance conduit
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 8
- 239000013521 mastic Substances 0.000 claims description 30
- 238000005259 measurement Methods 0.000 claims description 20
- 239000000523 sample Substances 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- 230000005622 photoelectricity Effects 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 claims 1
- 238000004364 calculation method Methods 0.000 claims 1
- 238000001228 spectrum Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006854 communication Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/661—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters using light
Abstract
The invention relates to a flow metering device and method for paste conveying pipeline and designs a set of optical fiber Doppler sensing system utilizing a fiber grating as a detecting element. The design comprises light source selection, photoelectric detector design, a demodulating device, a signal separation filtering circuit, a voltage amplifying circuit and a signal processing circuit. According to an optical fiber Doppler flow sensor, the scattering effect of solid particles to light and the optical Doppler effect are utilized, an optical fiber is taken as a transmission medium of light, light signal in the medium is demodulated by virtue of paste in the pipeline, the modulation light signal is converted into an electric parameter by virtue of a photoelectric detector, the electric parameter is finally subjected to spectral analysis by virtue of a voltage circuit amplifying circuit and a low-frequency filter circuit, and a measured flow value is obtained through modulation of a processing system, and therefore, the real-time monitoring on the flow of the paste in a filling pipeline is realized.
Description
Technical field
The invention belongs to the flow measurement device of coal waste filling conveyance conduit, particularly relate to a kind of mastic conveyance conduit
Flow measurement device and method.
Background technology
The method that the method for the flow measurement of filling pipeline is mainly radioelement detection at present.The method is owing to having
, there is retrofilling environment and the healthy threat of staff over the ground in radioactivity, promotes on a large scale and have limitation.
It is the most immature that other flow rate testing methods are in the experimental study stage, needs a kind of feasible, cheap, energy widespread adoption
Flow detector in filling system.
Summary of the invention
Installation environment is required higher by the metering device of existing filling pipeline flow, and general measurement apparatus is wanted installing
Ask comparison harsh so that conveyance conduit flow measurement precision cannot be guaranteed；Simultaneously they in use exist limitation and
Not versatility.
This device uses the flow of the conveyance conduit how general effect to light, Doppler's frequency when propagating in a fiber according to light
It is poor to move, and measures the flow of pipeline.This method has the advantages that certainty of measurement is high, error is little, it is possible to realize spoil mastic
The flow measurement of conveyance conduit.
According to Optical Doppler frequency displacement principle.The incident illumination sent when the light source that relative mastic is static injects the mastic of flowing
Time, light can meet with solid particle in communication process, because there is relative motion between light source and scattering particles, particle receives
The light arrived will occur frequency displacement for the first time；Meanwhile, each mastic will become scattering center, light can by mastic KPT Scatter,
Detector is the most static with mastic pipe, and the scattered light received occurs second time frequency displacement.
The frequency of light wave f received relative to the mastic particle of lamp motion1For:
In formula
f0The frequency of light source incidence light；
The flowing velocity of v mastic；
The refractive index of n mastic；
θ1Incident illumination and the angle of the direction of motion；
The light velocity in c vacuum
When scattering particles will become light source, detector is static relative to mastic pipe, and its scattered light received will occur second
Secondary frequency displacement, frequency f2It is changed to
In formula, θ2Emergent light and the angle of the direction of motion；
Due to speed of moving body v ＜ ＜ c, expansion above is taken first approximation, it may be assumed that
Ignore high-order term:
So, flow velocity be v mastic produced by Doppler frequency shift Δ f be:
λ in formula0For incident wavelength.
Deform to obtain the flow velocity v of mastic:
Then flow Q is:
Being the flow formula of Doppler's optic flow sensor, wherein D is pipe diameter.By measuring frequency displacement Δ f, i.e.
Available uninterrupted.
The flow measurement device of a kind of mastic conveyance conduit is mainly by laser instrument, optical fiber, bonder, transmitting probe, reception
Probe, photoelectric detective circuit, voltage amplifier circuit, low-frequency filter circuit, analog-digital converter and spectral analysis unit composition；Laser
Device connects bonder 1 input, and two outfans of bonder 1 are connected with transmitting probe and bonder 2 input respectively, coupling
Two outfans of device 2 connect receiving transducer and photoelectric detective circuit respectively, be connected with voltage in turn and put after photoelectric detective circuit
Big circuit, low-frequency filter circuit, analog-digital converter and spectral analysis unit.
Optical fiber is horizontally through pipeline and its input connects transmitting probe.
Optical fiber uses the silica fibre of light transmittance >=80%；The afterbody of fiber grating installs the device increasing tension force, this increasing
The device adding tension force is counterweight mass.
Laser instrument is semiconductor laser, and it has automatic power control circuit and automatic temp. controlling circuit.
Voltage amplifier circuit is differential voltage amplifying circuit；Circuit uses direct current ± 2.5V dual power supply.
The main operation principle of sensor is that laser instrument sends laser and is divided into two-way, wherein leads up to transmitting probe warp
Pipeline inner fiber is received by receiving transducer, and receive is the optical signal being loaded with mastic flow information, and optical signal is through light electrical resistivity survey
Survey device PIN and convert optical signal into photoelectric current；Faint photoelectricity flows through photoelectric detective circuit and is converted into voltage, and through voltage amplification
Circuit is amplified；By the voltage amplification of previous stage to volt level；High frequency present in circuit is filtered out by low-frequency filter circuit
Interference signal and noise；Signal is converted into digital signal through analog-digital converter；Finally by spectral analysis unit, signal is entered
Row processes, and obtains frequency information, finally calculates filling pipeline flow.
This device has good versatility, is applicable to the flow measurement of all of coal mine filling conveyance conduit, has
Can monitoring real-time to flow, precision advantage high, easy for installation.This device is applied to filling pipeline can filling flow be entered
Row accurate measurement.
Accompanying drawing explanation
Fig. 1 Doppler effect flow measurement schematic diagram
Fig. 2 Doppler's optic flow sensor index path
Fig. 3 Doppler's optical fibre flowmeter structure chart
Fig. 4 photodetector unit circuit diagram
Fig. 5 optical fiber increases tensioner schematic diagram
Detailed description of the invention
Along with the development of science and technology, the method for filling coal mining is used can the coal that overstock in " on three once " to be carried out
Exploitation.Accurate measurement to charging quantity is a difficult problem, and the method combined with practice by theoretical research, we design fortune
With doppler principle, filling flow is carried out the device of high-precision measuring.
In order to make those skilled in the art be better understood from technical scheme, below in conjunction with concrete accompanying drawing and being embodied as
The present invention is described in further detail for example.The most only it should be pointed out that, the description to process circuit in this part and description order
It is to the explanation being embodied as, is not construed as having protection scope of the present invention any restriction to use.
A bonder 1 as shown in Figure 2, D bonder 2, E bonder 3, B transmitting probe, C receiving transducer.
As it is shown on figure 3, the ingredient of Doppler's optical fibre flowmeter, mainly there is a laser instrument, bonder 1, bonder 2, send out
Penetrate probe, receiving transducer, photoelectric detective circuit, voltage amplifier circuit, low-frequency filter circuit, analog-digital converter and spectrum analysis list
Unit's composition.
As shown in Figure 4,1 photoelectric detective circuit, 2 differential amplifier circuits, 3 filter circuits.
The main operation principle of sensor is that laser instrument sends laser and is divided into two-way, wherein leads up to transmitting probe warp
Pipeline inner fiber is received by receiving transducer, and receive is the optical signal being loaded with mastic flow information, and optical signal is through light electrical resistivity survey
Survey device PIN and convert optical signal into photoelectric current；Faint photoelectricity flows through photoelectric detective circuit and is converted into voltage, and through voltage amplification
Circuit is amplified；By the voltage amplification of previous stage to volt level；High frequency present in circuit is filtered out by low-frequency filter circuit
Interference signal and noise；Signal is converted into digital signal through analog-digital converter；Finally by spectral analysis unit, signal is entered
Row processes, and obtains frequency information, finally calculates filling pipeline flow.
Optical fiber is horizontally through pipeline and adds continuous light source at its input, and when not having fluid matasomatism, sensing element exports
End light intensity is constant.When there being fluid to pass through optical fiber, fiber grating is produced active force, make fiber grating deformation produce foveal reflex
The drift of wavelength, causes output intensity to change.Fiber grating effusion meter detects the change of output light intensity, can obtain optical fiber
The drift value of raster center reflection wavelength, and then obtain its flow value.Owing to noise affects with resonance, need the afterbody at grating
The device increasing tension force is installed.
Laser instrument is semiconductor laser, and it has automatic power control circuit and automatic temp. controlling circuit, this device
Using semiconductor laser as light source generator part.The light that laser instrument produces is occurred with the light with mastic information by bonder
Interfere, obtain the light containing mastic flow information by photoelectric detective circuit, and convert thereof into the signal of telecommunication, wait follow-up place
Reason.
It is the faintest believing containing substantial amounts of noise after optical signal is converted into voltage signal by photoelectric detective circuit
Number.This device uses differential voltage amplifying circuit to be amplified the useful signal of telecommunication and its symmetrical structure can be good at suppressing zero
Point drift, noise and offset voltage, substantially increase the certainty of measurement of circuit.
The frequency shift signal of Doppler's optic flow sensor from 0 to 2.5MHz, uses low frequency with the excursion of flow
Wave circuit is by all noises removed outside useful signal and interference, and to guarantee the accuracy measured, noise therein includes environment
Noise and the noise introduced by photoelectric detective circuit and voltage amplifier circuit.
The useful frequency shift signal obtained, is converted into the numeral of processing unit identification by analog-digital converter by voltage signal
Signal, calculates the flow value of conveyance conduit.
The circuit diagram of whole photodetector unit is as shown in Figure 4.In order to reduce between amplifier each several part circuit by public affairs
DC source produces parasitic couplings altogether, and circuit uses direct current ± 2.5V dual power supply, and can be good at preventing to shake
Swing and disturb.Additionally, in order to prevent circuit from producing self-oscillation, a resistance in parallel near the positive-negative power end of each amplifier
Coupling electric capacity.
It is good a little that this device has installation simple general-purpose, and applying to mastic conveyance conduit can carry out essence to feed flow
True metering.
Claims (5)
1. the flow measurement device of a mastic conveyance conduit, it is characterised in that: main by laser instrument, optical fiber, bonder, transmitting
Probe, receiving transducer, photoelectric detective circuit, voltage amplifier circuit, low-frequency filter circuit, analog-digital converter and spectral analysis unit
Composition；Laser instrument connect bonder 1 input, two outfans of bonder 1 respectively with transmitting probe and bonder 2 input
Connecting, two outfans of bonder 2 connect receiving transducer and photoelectric detective circuit respectively, are sequentially connected with after photoelectric detective circuit
There are voltage amplifier circuit, low-frequency filter circuit, analog-digital converter and spectral analysis unit.Optical fiber is horizontally through pipeline and it is defeated
Enter end and connect transmitting probe.
The flow measurement device of a kind of mastic conveyance conduit the most as claimed in claim 1, it is characterised in that: optical fiber uses printing opacity
The silica fibre of rate >=80%；The afterbody of fiber grating installs the device increasing tension force, and the device of this increase tension force is counterbalance
Block.
The flow measurement device of a kind of mastic conveyance conduit the most as claimed in claim 2, it is characterised in that: laser instrument is partly to lead
Body laser, it has automatic power control circuit and automatic temp. controlling circuit.
The flow measurement device of a kind of mastic conveyance conduit the most as claimed in claim 3, it is characterised in that: voltage amplifier circuit
For differential voltage amplifying circuit；Circuit uses direct current ± 2.5V dual power supply.
5. the flow metering method of a mastic conveyance conduit, it is characterised in that: utilize the mastic in any one of claim 1-4
The flow measurement device of conveyance conduit carries out the flow measurement of mastic conveyance conduit；Laser instrument sends laser and is divided into two-way, wherein
Transmitting probe of leading up to is received by receiving transducer through pipeline inner fiber, and receive is the light letter being loaded with mastic flow information
Number, optical signal converts optical signal into photoelectric current through photodetector PIN；Faint photoelectricity flows through photoelectric detective circuit and converts
For voltage, and amplified through voltage amplifier circuit；By the voltage amplification of previous stage to volt level；Filtered by low-frequency filter circuit
High-frequency interferencing signal and noise present in power down road；Signal is converted into digital signal through analog-digital converter；Finally by frequency
Signal is processed by analysis of spectrum unit, obtains frequency information, finally calculates filling pipeline flow；Flow rate calculation formula is:
Wherein D is pipe diameter, and Δ f is frequency displacement, and v is the flowing velocity of mastic；N is the refractive index of mastic；θ1For incident illumination and fortune
The angle in dynamic direction；θ2For emergent light and the angle of the direction of motion；λ0For incident wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610559733.8A CN106017586A (en) | 2016-07-15 | 2016-07-15 | Flow metering device and method for paste conveying pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610559733.8A CN106017586A (en) | 2016-07-15 | 2016-07-15 | Flow metering device and method for paste conveying pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106017586A true CN106017586A (en) | 2016-10-12 |
Family
ID=57118341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610559733.8A Pending CN106017586A (en) | 2016-07-15 | 2016-07-15 | Flow metering device and method for paste conveying pipeline |
Country Status (1)
| Country | Link |
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| CN (1) | CN106017586A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111213037A (en) * | 2017-09-21 | 2020-05-29 | 日本先锋公司 | Optical measuring device, optical measuring method, computer program, and recording medium |
| CN112525276A (en) * | 2020-12-14 | 2021-03-19 | 北京化工大学 | Outer ultrasonic flowmeter installation error analogue means that presss from both sides based on laser light path |
| CN115273419A (en) * | 2022-08-01 | 2022-11-01 | 西安科技大学 | GIS-based filling pumping pipeline flow monitoring and early warning system and early warning method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854330A (en) * | 2012-09-07 | 2013-01-02 | 哈尔滨工程大学 | Optical fiber transmission type acousto-optic modulation laser Doppler coherent detector |
| CN103162751A (en) * | 2013-02-05 | 2013-06-19 | 天津大学 | Ultrasonic flowmeter |
-
2016
- 2016-07-15 CN CN201610559733.8A patent/CN106017586A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854330A (en) * | 2012-09-07 | 2013-01-02 | 哈尔滨工程大学 | Optical fiber transmission type acousto-optic modulation laser Doppler coherent detector |
| CN103162751A (en) * | 2013-02-05 | 2013-06-19 | 天津大学 | Ultrasonic flowmeter |
Non-Patent Citations (1)
| Title |
|---|
| 潘东青: "《油井多普勒光纤流量传感器的研究》", 《哈尔滨工业大学硕士学位论文》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111213037A (en) * | 2017-09-21 | 2020-05-29 | 日本先锋公司 | Optical measuring device, optical measuring method, computer program, and recording medium |
| CN112525276A (en) * | 2020-12-14 | 2021-03-19 | 北京化工大学 | Outer ultrasonic flowmeter installation error analogue means that presss from both sides based on laser light path |
| CN115273419A (en) * | 2022-08-01 | 2022-11-01 | 西安科技大学 | GIS-based filling pumping pipeline flow monitoring and early warning system and early warning method |
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| DD01 | Delivery of document by public notice |
Addressee: Yang Fan Document name: First notice of examination opinions |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161012 |
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