CN106353534A - Novel pipeline flow speed detection sensor - Google Patents
Novel pipeline flow speed detection sensor Download PDFInfo
- Publication number
- CN106353534A CN106353534A CN201610877121.3A CN201610877121A CN106353534A CN 106353534 A CN106353534 A CN 106353534A CN 201610877121 A CN201610877121 A CN 201610877121A CN 106353534 A CN106353534 A CN 106353534A
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- light
- laser
- detection sensor
- focusing lens
- pipeline flow
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- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000004065 semiconductor Substances 0.000 claims abstract description 5
- 230000000737 periodic effect Effects 0.000 claims description 15
- 238000005286 illumination Methods 0.000 claims description 5
- 230000005693 optoelectronics Effects 0.000 claims 1
- 230000017105 transposition Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 7
- 230000003287 optical effect Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 230000004044 response Effects 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 1
- 230000036314 physical performance Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000005259 measurement Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000005622 photoelectricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 239000004531 microgranule Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004801 process automation Methods 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 238000005829 trimerization reaction Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/26—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave
Abstract
The invention provides a novel pipeline flow speed detection sensor, which comprises a laser, a laser beam splitter mirror, a first focusing lens, a second focusing lens, a third focusing lens, a photoelectric detector and a photoelectric conversion unit, wherein the laser is a semiconductor laser; the beam splitter mirror is a double-side half transparent and half reflecting mirror; the first focusing lens and the third focusing lens are parallel; the photoelectric conversion unit is connected with an analogue multiplier; the analogue multiplier is connected with a demodulator. A backscattering mode is used on an aspect of sensor optical path design, an observation window does not need to be formed in the pipeline wall; no interference is caused on the fluid field; the linear performance of the output characteristics is very good; the calibration does not need to be performed; the measuring precision is not influenced by parameters such as pressure, temperature and other physical performance beyond the fluid refractive index; the space resolution is high; no inertia exists, so that the frequency response characteristic is good; the speed measuring range is wide, and can be from low speed of the 30 to 3 mm/s stage to supersonic speed; the measuring direction characteristic is stable; the turbulent velocity ingredient of circulation current in the reflow phenomenon can be measured.
Description
Technical field
The invention belongs to field of sensing technologies, especially relate to a kind of novel pipeline flow rate detection sensor.
Background technology
In the waterline running of modern city water supply process, in-pipe flow amount be important procedure parameter it
One.Aqueduct flow is the efficiency of weighing device and the important indicator of economy；Water delivery flow is long-distance large-caliber water delivery
Production operation and the foundation controlling, because during the water supply production run of most cities, flow monitoring is to realize producing
Process automation and the important evidence of optimum control.Simultaneously in order to carry out business accounting it is also necessary to know the medium total amount flowing through, institute
With, the measurement of flow with to control be a vital task of water delivery water supply production process.
In the waterline running of modern city water supply process, in-pipe flow amount be important procedure parameter it
One.Aqueduct flow is the efficiency of weighing device and the important indicator of economy；Water delivery flow is long-distance large-caliber water delivery
Production operation and the foundation controlling, because during the water supply production run of most cities, flow monitoring is to realize producing
Process automation and the important evidence of optimum control.Simultaneously in order to carry out business accounting it is also necessary to know the medium total amount flowing through, institute
With, the measurement of flow with to control be a vital task of water delivery water supply production process.
Doppler laser velocimeter is to carry out flow-speed measurement using laser doppler.Follow stream when laser is irradiated to
When on the microgranule that body moves together, the scattering light frequency of Particle Scattering will deviate from incident light frequency, and this phenomenon just makes laser many
General Le effect, the frequency departure amount wherein between scattered light and incident illumination is referred to as Doppler frequency shift.Doppler frequency shift and microgranule
Movement velocity, that is, the flow velocity of fluid be directly proportional.Therefore, measure the speed that Doppler frequency shift just can record fluid.
Laser Doppler vibration, since 20th century started to be applied to in-pipe flow, has obtained development at full speed.It
Belong to non-contact speed measurement.Technical disadvantages are at present: Doppler laser velocimeter is the huge measuring system of a comparison, with skin
Trustship is compared, and it is not only expensive, and uses complex operation, must also arrange laser observations window on flowing tube wall simultaneously
Mouthful, and in detected fluid plus cut out can sufficiently respond to microscopic scatterers of fluid velocity etc..
Content of the invention
In view of this, it is contemplated that proposing a kind of novel pipeline flow rate detection sensor it is achieved that large-scale water transmission pipeline
The online measurement of flow velocity.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of novel pipeline flow rate detection sensor, including
Laser instrument, for producing laser；
Laser beam splitter mirror, positioned at the light path rear end of laser, for becoming parallel beam incident to arrive light splitting described laser beam splitter
Mirror, incident illumination is divided into periodic modulation light and modulated signal light by spectroscope；
First condenser lenses, positioned at the light path rear end of periodic modulation light, for inciding photoelectricity by described periodic modulation light
Detector, photodetector connects photoelectric conversion unit；
Second condenser lenses, positioned at the light path rear end of modulated signal light, tested for inciding described modulated signal light
Medium, the light echo after simultaneously receiving through measured medium scattering, and light echo is divided into Doppler frequency shift modulation light；
Tertiary focusing lens, modulate the light path rear end of light positioned at Doppler frequency shift, for modulating described Doppler frequency shift
Light incides photodetector, and photodetector connects photoelectric conversion unit.
Further, described laser instrument is semiconductor laser.
Further, described spectroscope is two-sided semi-transparent semi-reflecting lens.
Further, the separate periodic modulation light of described spectroscope and modulated signal light are mutually in 90 °, described modulated signal
Light is mutually in 90 ° with described Doppler frequency shift modulation light.
Further, described first condenser lenses are parallel with tertiary focusing lens.
Further, described photoelectric conversion unit connects analog multiplier, and analog multiplier connects demodulator.
With respect to prior art, a kind of novel pipeline flow rate detection sensor of the present invention has the advantage that this
Invention adopts backscattering formula laser-Doppler flow speed measurement sensor, and the design of this sensor optical path adopts backscattering side
, it is not necessary to open up observation window in duct wall, stream field is noiseless for formula；The rectilinearity of output characteristics fairly good it is not necessary to enter rower
Fixed；Certainty of measurement is not affected by other physical properties beyond fluid refractive index and temperature, pressure and other parameters；Spatial resolution
High, noninertia, thus good frequency response；The scope that tests the speed is wide, can be from the low speed of 30-3mm/s level to supersonic speed；Measurement direction is special
Property stable；The turbulent velocity composition of recycle stream in backflow phenomena can be measured.
Brief description
The accompanying drawing constituting the part of the present invention is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is a kind of structural representation of novel pipeline flow rate detection sensor described in the embodiment of the present invention；
Description of reference numerals:
1- laser instrument, 2- laser beam splitter mirror, 3- spectroscope, 4- first condenser lenses, 5- second condenser lenses, 6- trimerization
Focus lens, 7- photodetector, 8- photoelectric conversion unit, 9- periodic modulation light, 10- modulated signal light, 11- Doppler frequency shift is adjusted
Light processed, 12- moving particle thing, 13- analog multiplier, 14- demodulator.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combine.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " on ", D score,
The orientation of instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " or position relationship are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right
The restriction of the present invention.Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating or hint phase
To importance or the implicit quantity indicating indicated technical characteristic.Thus, the feature defining " first ", " second " etc. can
To express or to implicitly include one or more this feature.In describing the invention, unless otherwise stated, " multiple "
It is meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can
To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
To describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As shown in figure 1, a kind of novel pipeline flow rate detection sensor, including laser instrument 1, for producing laser；Laser divides
Bundle mirror 2, positioned at the light path rear end of laser, for becoming parallel beam incident to spectroscope 3 described laser beam splitter, spectroscope 3 will
Incident illumination is divided into periodic modulation light 9 and modulated signal light 10；First condenser lenses 4, positioned at the light path rear end of periodic modulation light 9,
For described periodic modulation light 9 is incided photodetector 7, photodetector 7 connects photoelectric conversion unit 8；Second focusing
Lens 5, positioned at the light path rear end of modulated signal light 10, for described modulated signal light 10 is incided measured medium, connect simultaneously
Light echo after receiving through measured medium scattering, and light echo is divided into Doppler frequency shift modulation light 11；Tertiary focusing lens 6, are located at
Doppler frequency shift modulates the light path rear end of light 11, incides photodetector 7, light for described Doppler frequency shift is modulated light 11
Electric explorer 7 connects photoelectric conversion unit 8.Described laser instrument 1 is semiconductor laser.Described spectroscope 3 is two-sided semi-transparent half
Anti- mirror.The separate periodic modulation light 9 of described spectroscope 3 and modulated signal light 10 are mutually in 90 °, described modulated signal light 10 and institute
State Doppler frequency shift modulation light 11 mutually in 90 °.Described first condenser lenses 4 are parallel with tertiary focusing lens 6.Described photoelectricity turns
Change unit 8 and connect analog multiplier 13, analog multiplier 13 connects demodulator 14.
Cosine-modulation laser is squeezed into laser beam splitter mirror 2 by semiconductor laser 1, and laser beam splitter mirror 2 is by laser beam splitter Cheng Ping
Row light beam incides spectroscope 3, and spectroscope 3 is two-sided semi-transparent semi-reflecting optical lenses, the incident illumination half of laser beam splitter mirror 2
Periodic modulation light is formed by spectroscope 3 and reflexes to the first condenser lenses 4, second half passes through spectroscope 3 and forms modulated signal light
10 entrance the second condenser lenses 5, the first condenser lenses 4 incide photodetector 7 by after the convergence of periodic modulation light, realize photoelectricity
Signal is changed, and modulated signal light is converged and gets to Motion Particles by the second condenser lenses 5, and light scatters in particle surface, dissipates
Penetrate light through the second condenser lenses 5 light echo, heliogram forms Doppler frequency shift modulation light through spectroscope 3 and reflexes to trimerization
Focus lens 6, reach photodetector 7 after convergence, realize photoelectric signal transformation.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of novel pipeline flow rate detection sensor it is characterised in that: include
Laser instrument (1), for producing laser；
Laser beam splitter mirror (2), positioned at the light path rear end of laser, for becoming parallel beam incident to spectroscope by described laser beam splitter
(3), incident illumination is divided into periodic modulation light (9) and modulated signal light (10) by spectroscope (3)；
First condenser lenses (4), positioned at the light path rear end of periodic modulation light (9), for inciding described periodic modulation light (9)
Photodetector (7), photodetector (7) connects photoelectric conversion unit (8)；
Second condenser lenses (5), positioned at the light path rear end of modulated signal light (10), for incident by described modulated signal light (10)
To measured medium, the light echo after receiving through measured medium scattering simultaneously, and light echo is divided into Doppler frequency shift modulation light (11)；
Tertiary focusing lens (6), modulate the light path rear end of light (11) positioned at Doppler frequency shift, for adjusting described Doppler frequency shift
Light (11) processed incides photodetector (7), and photodetector (7) connects photoelectric conversion unit (8).
2. a kind of novel pipeline flow rate detection sensor according to claim 1 it is characterised in that: described laser instrument (1)
For semiconductor laser.
3. a kind of novel pipeline flow rate detection sensor according to claim 1 it is characterised in that: described spectroscope (3)
For two-sided semi-transparent semi-reflecting lens.
4. a kind of novel pipeline flow rate detection sensor according to claim 1 it is characterised in that: described spectroscope (3)
Separate periodic modulation light (9) and modulated signal light (10) are mutually in 90 °, and described modulated signal light (10) is with described Doppler frequently
Transposition light (11) is mutually in 90 °.
5. a kind of novel pipeline flow rate detection sensor according to claim 1 it is characterised in that: described first focuses on thoroughly
Mirror (4) is parallel with tertiary focusing lens (6).
6. a kind of novel pipeline flow rate detection sensor according to claim 1 it is characterised in that: described opto-electronic conversion list
First (8) connect analog multiplier (13), and analog multiplier (13) connects demodulator (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877121.3A CN106353534A (en) | 2016-09-30 | 2016-09-30 | Novel pipeline flow speed detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877121.3A CN106353534A (en) | 2016-09-30 | 2016-09-30 | Novel pipeline flow speed detection sensor |
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| Publication Number | Publication Date |
|---|---|
| CN106353534A true CN106353534A (en) | 2017-01-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610877121.3A Pending CN106353534A (en) | 2016-09-30 | 2016-09-30 | Novel pipeline flow speed detection sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113115967A (en) * | 2021-04-21 | 2021-07-16 | 淮阴工学院 | Food processing equipment capable of being accurately controlled and processing method thereof |
| CN113465719A (en) * | 2021-06-29 | 2021-10-01 | 西安交通大学 | Method and device for simultaneously measuring sound velocity and refractive index of fluid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2439242A1 (en) * | 2003-09-03 | 2005-03-03 | Photon Control Inc. | Optical flow meter for measuring gases and liquids in pipelines |
| CN102357033A (en) * | 2011-09-27 | 2012-02-22 | 华中科技大学 | Laser speckle blood stream imaging processing system and method |
| US20160202164A1 (en) * | 2004-03-06 | 2016-07-14 | Michael Trainer | Methods and apparatus for determining characteristics of particles from scattered light |
-
2016
- 2016-09-30 CN CN201610877121.3A patent/CN106353534A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2439242A1 (en) * | 2003-09-03 | 2005-03-03 | Photon Control Inc. | Optical flow meter for measuring gases and liquids in pipelines |
| US20160202164A1 (en) * | 2004-03-06 | 2016-07-14 | Michael Trainer | Methods and apparatus for determining characteristics of particles from scattered light |
| CN102357033A (en) * | 2011-09-27 | 2012-02-22 | 华中科技大学 | Laser speckle blood stream imaging processing system and method |
Non-Patent Citations (2)
| Title |
|---|
| 吴凤林: "《力学实验 上 基础和流体力学部分》", 30 April 1989, 北京：高等教育出版社, pages: 127 - 136 * |
| 张艳艳 等: "激光多普勒测速技术进展", 《激光与红外》, no. 11, 30 November 2010 (2010-11-30), pages 1157 - 1162 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113115967A (en) * | 2021-04-21 | 2021-07-16 | 淮阴工学院 | Food processing equipment capable of being accurately controlled and processing method thereof |
| CN113465719A (en) * | 2021-06-29 | 2021-10-01 | 西安交通大学 | Method and device for simultaneously measuring sound velocity and refractive index of fluid |
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