CN110441239A - A kind of adjustable pipeline measuring of phase ratio system and method for light path - Google Patents
A kind of adjustable pipeline measuring of phase ratio system and method for light path Download PDFInfo
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- CN110441239A CN110441239A CN201910722777.1A CN201910722777A CN110441239A CN 110441239 A CN110441239 A CN 110441239A CN 201910722777 A CN201910722777 A CN 201910722777A CN 110441239 A CN110441239 A CN 110441239A
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- mirror
- concave mirror
- light
- pipe
- light path
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
Abstract
The present invention provides a kind of adjustable pipeline measuring of phase ratio system and method for light path, system includes plumbing installation, light path regulating device, light source emitter and signal receiving device；Plumbing installation includes being located in the middle Lucite pipe and being sequentially connected to the large-diameter pipe at Lucite pipe both ends, transition conical pipe and small-bore pipe；The light path regulating device includes the first concave mirror being set on the downside of Lucite pipe and third concave mirror and the first guide-lighting mirror being sequentially arranged on the upside of Lucite pipe, the second concave mirror, the second guide-lighting mirror；First concave mirror and third concave mirror are arranged symmetrically in the two sides of the second concave mirror central axis；The light source emitter is for emitting visible light and near infrared light.The configuration of the present invention is simple realizes freely adjusting for optical path, increases light path, improves signal-to-noise ratio, to improve measuring accuracy, it can be achieved that real-time online detects.
Description
Technical field
The present invention relates to biphase gas and liquid flow detection technique fields, relate in particular to a kind of adjustable pipeline phase content of light path
Detection system and method.
Background technique
Biphase gas and liquid flow is widely used in the industries such as electric power, coal, metallurgy, petroleum, chemical industry.Phase content is biphase gas and liquid flow
One of important parameter, the real-time of phase content, on-line measurement are to the real-time control of gas-liquid two-phase streaming system, safe operation, online
Detection etc. plays an important role.
There are many phase content measurement structures of current biphase gas and liquid flow, mainly has in report: first is that using most common circle
Probe is positioned radially along measurement pipeline to carry out the measurement of phase content by pipe.Round Lucite pipe has radian, and laser exists
Refraction can be generated when irradiating organic glass outer wall, refraction and reflection is generated again when through organic glass and fluid boundary, causes
Reception device probe cannot completely after receiving attenuation optical signal, the uncertainty of measurement is larger, to measurement result cause compared with
Big influence；Second is that designing the biphase gas and liquid flow measuring of phase ratio dress measured along two phase flow direction on horizontal pipe
It sets, the mode that original probe is positioned radially measurement is changed to measure along fluid flow direction, improves corresponding receiving transducer
The ability for receiving signal, achievees the purpose that accurately to measure；Third is that being formed by using multiple groups transmitting probe and receiving transducer unified
It is whole, the integrality that information is received along axial infrared receiver probe is increased, using near-infrared transmitting-receiving probe to horizontal and vertical
The biphase gas and liquid flow of flow direction is detected, to achieve the purpose that more accurately to measure.Complicated operation for above-mentioned detection, light path
Limited and inconvenient adjustment, it is difficult to realize that real-time online detects.
What the design of the above structure used is all near infrared light measurement, and near-infrared laser measuring technique is without sampling and sample
Pretreatment obtains desk study research in two-phase flow field, but since two phase flow medium interface is complicated and changeable, simultaneously
Due to the naked eyes invisibility of near infrared light, measuring accuracy is ideal not enough.
Summary of the invention
An object of the present invention is just to provide a kind of adjustable pipeline measuring of phase ratio system of light path, to solve existing system
System causes noise relatively low since light path is limited, so that measurement result be made to there are problems that deviation.
The second object of the present invention is just to provide a kind of adjustable pipeline measuring of phase ratio method of light path.
An object of the present invention is achieved through the following technical solutions: a kind of adjustable pipeline measuring of phase ratio of light path
System, including plumbing installation, light path regulating device, light source emitter and signal receiving device；
The plumbing installation is for the fluid to be measured that circulates, including is located in the middle Lucite pipe and is respectively sequentially connected to
Large-diameter pipe, transition conical pipe and the small-bore pipe at Lucite pipe both ends, the wide mouth end of transition conical pipe with it is corresponding
Large-diameter pipe is connected, and the slot end of transition conical pipe is connected with corresponding small-bore pipe；
The light path regulating device includes the first concave mirror and third concave mirror on the downside of Lucite pipe
And it is sequentially arranged in the first guide-lighting mirror, the second concave mirror, the second guide-lighting mirror on the upside of Lucite pipe；Described first is recessed
Face reflecting mirror and third concave mirror are arranged symmetrically in the two sides of the second concave mirror central axis；Described first guide-lighting mirror
For incident light to be imported the first concave mirror, signal light is successively through the first concave mirror, the second concave mirror and the
After three concave mirror continuous reflections, signal receiving device is imported by the second guide-lighting mirror；
The light source emitter is for emitting visible light and near infrared light；
The signal receiving device includes condenser lens and photodetector, and photodetector is for receiving after fluid absorbs
Optical signal simultaneously converts optical signals to electric signal.
Described first guide-lighting mirror and the second guide-lighting mirror are plane mirror, and are existed each by the setting of adjustable bracket
Predetermined position.
First concave mirror, the second concave mirror and third concave mirror are each by adjustable bracket
It is arranged in predetermined position.
The plumbing installation is rectangular tube.
The detection system includes data acquisition and procession device, data acquisition and procession device include data collecting card and
Computer, the data of data collecting card acquisition photodetector simultaneously reach processing and analysis that computer carries out data.
The second object of the present invention is to what is be achieved through the following technical solutions: a kind of adjustable pipeline measuring of phase ratio of light path
Method, comprising the following steps:
A, said detecting system is set；
B, optical path adjusts: light source emitter being made to emit visible light, the guide-lighting mirror of adjustment first, the second guide-lighting mirror, the first concave reflection
The position of mirror, the second concave mirror and third concave mirror enables signal light successively through the first concave mirror,
Two concave mirrors and third concave mirror carry out continuous reflection, so that signal light is made to pass through Lucite pipe several times,
Meanwhile emergent light can be received by a photoelectric detector；
C, pipeline measuring of phase ratio: being passed through fluid to be measured into plumbing installation, and light source emitter is made to emit near infrared light, near-infrared
Light passes through Lucite pipe several times and is partially absorbed by fluid to be measured along the optical path adjusted, and photodetector receives warp
Near infrared light signal after fluid to be measured absorption, and it is converted into electric signal；
D, the pipeline phase content is obtained after data process&analysis.
The visible light is one-wavelength laser.
The present invention for the first time combines transparent organic glass pipeline, visible light, near infrared light and concave reflection microscope group
Mode the phase content of the biphase gas and liquid flow in pipeline is measured, this method can effectively increase light path, realize more
Add accurate, reliable measurement, the phase content for biphase gas and liquid flow in measurement pipeline provides a kind of effective technological means.
Compared to existing measuring system and measurement method, advantage is in particular in three aspects: first is that using poly-
Focus lens, carry out the effect of convergence of rays, to increase signal strength, improve signal-to-noise ratio, increase the accuracy of measurement；Second is that sharp
With the visualization system of visible light, it is able to observe that transmission of the optical path in pipeline, consequently facilitating the adjustment of optical path, is near-infrared
The phase content of light measurement biphase gas and liquid flow provides foundation and guarantee；Third is that concave mirror structure is combined with rectangular duct,
Make light generation multiple reflections and optical path is adjustable, while reducing refraction number of the light when irradiating organic glass outer wall, detection knot
Fruit is more accurate.
Measurement method of the invention realizes freely adjusting for optical path, increases light path, reduces detection limit, increases letter
Number intensity, improves signal-to-noise ratio, to improve measuring accuracy.And apparatus of the present invention structure is simple, is accurately being surveyed
It will also influence to fall below minimum caused by manifold while amount, with practical application more closely, improving the confidence level of measurement,
Real-time online detection can be achieved.
In addition, in this adjustable pipeline of light path the detection system of the phase content of biphase gas and liquid flow can help to study it is visible
Attenuation characteristic of the light in gas-liquid, and compare and refer to do an auxiliary near infrared light with this, further push near-infrared
The development of spectral technique.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of detection system of the present invention.Arrow refers to the flow direction of fluid to be measured in figure.
In figure: 1-small-bore pipe；2-transition conical pipes；3-large-diameter pipes；4-Lucite pipes；5-the first is recessed
Face reflecting mirror；6-the second concave mirror；7-third concave mirrors；8-the first guide-lighting mirror；9-the second guide-lighting mirror；10—
Light source emitter；11-condenser lenses；12-photodetectors；13-computers.
Specific embodiment
As shown in Figure 1, detection system of the invention includes that plumbing installation, light path regulating device, light source emitter, signal connect
Receiving apparatus, data acquisition and procession device.
Plumbing installation be from left to right followed successively by small-bore pipe 1, transition conical pipe 2, large-diameter pipe 3, Lucite pipe 4,
Large-diameter pipe 3, transition conical pipe 2, small-bore pipe 1, Lucite pipe 4 are gular transparent pipeline, the nozzle of other each pipelines
For rectangle, junction size matches and is tightly connected.
The adjustable pipeline measuring of phase ratio structure of light path described herein, the internal diameter of tube body of the osculum caliber are D1=50mm,
Tube length L1=80mm, tube body wall thickness are 2mm；The tube length of the transition conical pipe is L2=65mm ；The big mouth caliber
Internal diameter of tube body be D2=80mm, tube length L3=45mm, tube body wall thickness are 2mm；The internal diameter of tube body of the Lucite pipe is
D3=80mm, outer tube diameter D4=82mm, tube length L4=145mm, tube body wall thickness are 2mm；First concave mirror,
Two concave mirrors and the accessible light path range of third concave mirror are 4.4-35m.
Light path regulating device includes the first concave mirror 5 and third concave mirror on the downside of Lucite pipe
7 and the first guide-lighting mirror 8, second the 6, the second guide-lighting mirror 9 of concave mirror that are sequentially arranged on the upside of Lucite pipe；First is recessed
Face reflecting mirror 5, the second concave mirror 6 and third concave mirror 7 are that concave mirror surface is recessed towards Lucite pipe 4, first
Face reflecting mirror 5 with 7 size of third concave mirror, radian is identical and is arranged symmetrically in 6 central axis of the second concave mirror
The size of the two sides of line, the second concave mirror is greater than the first concave mirror 5 and third concave mirror 7, in order to light
Journey is adjusted；First guide-lighting mirror 8 is used to incident light importing the first concave mirror 5, and signal light is successively anti-through the first concave surface
After penetrating 7 continuous reflection of mirror 5, the second concave mirror 6 and third concave mirror, signal is imported by the second guide-lighting mirror 9 and receives dress
It sets；First concave mirror 5, the second concave mirror 6 and third concave mirror 7 are arranged each by adjustable bracket
Predetermined position, the first guide-lighting mirror 8 and the second guide-lighting mirror 9 are three angle mirrors.Before light source emitter 10 is located at the first guide-lighting mirror 8
Side, for emitting visible light or near infrared light.Signal receiving device is located at the rear side of the second guide-lighting mirror 9, successively includes focusing thoroughly
Mirror 11 and photodetector 12, photodetector 12 is for receiving the optical signal after fluid absorbs and converting optical signals to electricity
Signal.
Fluid to be measured flow to Lucite pipe after flowing through small-bore pipe 1, transition conical pipe 2 and large-diameter pipe 3 by side
4, incident light level is reflected between concave mirror after injecting the first guide-lighting mirror 8, and carries out continuous reflection, and fluid flows through
When the segment pipe, near infrared light is by fluid absorption mat energy, to make its light intensity decreasing.By photodetector 12 and focus saturating
The position of mirror 11 fixes, can be in best position sensing light intensity.Photodetector 12 can receive after fluid absorbs
Light intensity signal, and be converted into electric signal, finally data handled and analyzed using computer 13, the processing of data
Existing conventional method of analysis can be used with analysis.
Optical path adjustment can be carried out for different detection demands, it is available light first to pre-adjust optical path, it
Near infrared light is recycled to be detected afterwards.Specific detecting step is as follows:
A, said detecting system is set；
B, optical path adjusts: so that light source emitter 10 is emitted visible light, it is seen that light is one-wavelength laser.The guide-lighting mirror 8, second of adjustment first
The position of guide-lighting mirror 9, the first concave mirror 5, the second concave mirror 6 and third concave mirror 7, enable signal light according to
It is secondary to carry out continuous reflection through the first concave mirror 5, the second concave mirror 6 and third concave mirror 7, to make signal light
Lucite pipe 4 is passed through several times, meanwhile, emergent light can be received by photodetector 12；
C, pipeline measuring of phase ratio: being passed through fluid to be measured into plumbing installation, and light source emitter 10 is made to emit near infrared light, close red
Outer light passes through Lucite pipe 4 several times and is absorbed by fluid to be measured along the optical path adjusted, so that light intensity has centainly
Decaying；
D, the convergence light being emitted with 12 Duis of photodetector detects, and is adopted by data of the data collecting card to detection
Collection, and be transferred on computer, finally phase content is calculated according to the data of transmission.
The dimensional parameters of concave mirror and guide-lighting mirror can be depending on the actual size situation of pipeline in the present invention.Three faces
The relative position of concave mirror is immutable.Above-mentioned detection is easy to operate, and light path can be adjusted according to actual needs, can be realized
Real-time online detection is suitable for promoting and applying.
Claims (7)
1. a kind of adjustable pipeline measuring of phase ratio system of light path, characterized in that including plumbing installation, light path regulating device, light
Source transmitter and signal receiving device；
The plumbing installation is for the fluid to be measured that circulates, including is located in the middle Lucite pipe and is respectively sequentially connected to
Large-diameter pipe, transition conical pipe and the small-bore pipe at Lucite pipe both ends, the wide mouth end of transition conical pipe with it is corresponding
Large-diameter pipe is connected, and the slot end of transition conical pipe is connected with corresponding small-bore pipe；
The light path regulating device includes the first concave mirror and third concave mirror on the downside of Lucite pipe
And it is sequentially arranged in the first guide-lighting mirror, the second concave mirror, the second guide-lighting mirror on the upside of Lucite pipe；Described first is recessed
Face reflecting mirror and third concave mirror are arranged symmetrically in the two sides of the second concave mirror central axis；Described first guide-lighting mirror
For incident light to be imported the first concave mirror, signal light is successively through the first concave mirror, the second concave mirror and the
After three concave mirror continuous reflections, signal receiving device is imported by the second guide-lighting mirror；
The light source emitter is for emitting visible light and near infrared light；
The signal receiving device includes condenser lens and photodetector, and photodetector is for receiving after fluid absorbs
Optical signal simultaneously converts optical signals to electric signal.
2. the adjustable pipeline measuring of phase ratio system of light path according to claim 1, characterized in that the described first guide-lighting mirror
It is plane mirror with the second guide-lighting mirror, and is arranged each by adjustable bracket in predetermined position.
3. the adjustable pipeline measuring of phase ratio system of light path according to claim 1, characterized in that first concave surface is anti-
Mirror, the second concave mirror and third concave mirror is penetrated to be arranged each by adjustable bracket in predetermined position.
4. the adjustable pipeline measuring of phase ratio system of light path according to claim 1, characterized in that the plumbing installation is equal
For rectangular tube.
5. the adjustable pipeline measuring of phase ratio system of light path according to claim 1, characterized in that the detection system packet
Data acquisition and procession device is included, data acquisition and procession device includes data collecting card and computer, data collecting card acquisition
The data of photodetector simultaneously reach processing and analysis that computer carries out data.
6. a kind of adjustable pipeline measuring of phase ratio method of light path, characterized in that the following steps are included:
A, any detection system of claim 1 ~ 5 is set；
B, optical path adjusts: light source emitter being made to emit visible light, the guide-lighting mirror of adjustment first, the second guide-lighting mirror, the first concave reflection
The position of mirror, the second concave mirror and third concave mirror enables signal light successively through the first concave mirror,
Two concave mirrors and third concave mirror carry out continuous reflection, so that signal light is made to pass through Lucite pipe several times,
Meanwhile emergent light can be received by a photoelectric detector；
C, pipeline measuring of phase ratio: being passed through fluid to be measured into plumbing installation, and light source emitter is made to emit near infrared light, near-infrared
Light passes through Lucite pipe several times and is partially absorbed by fluid to be measured along the optical path adjusted, and photodetector receives warp
Near infrared light signal after fluid to be measured absorption, and it is converted into electric signal；
D, the pipeline phase content is obtained after data process&analysis.
7. the adjustable pipeline measuring of phase ratio method of light path according to claim 6, characterized in that the visible light is single
Color laser.
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| CN201910722777.1A CN110441239B (en) | 2019-08-06 | 2019-08-06 | Optical path-adjustable pipeline phase content rate detection system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910722777.1A CN110441239B (en) | 2019-08-06 | 2019-08-06 | Optical path-adjustable pipeline phase content rate detection system and method |
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| CN110441239A true CN110441239A (en) | 2019-11-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2011214172A1 (en) * | 2010-02-09 | 2012-08-30 | Duvas Technologies Limited | Optical absorption spectroscopy with multi-pass cell with adjustable optical path length |
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| CN105628108A (en) * | 2015-12-22 | 2016-06-01 | 河北大学 | Device and method for measuring flow of gas-liquid two phase fluids in vertical pipeline |
| CN105910663A (en) * | 2016-04-06 | 2016-08-31 | 河北大学 | Device and method for measuring flow of gas-liquid two-phase flow |
| CN108801377A (en) * | 2017-04-30 | 2018-11-13 | 南京理工大学 | A kind of Optical devices for specialized fluids flow velocity and flow measurement |
-
2019
- 2019-08-06 CN CN201910722777.1A patent/CN110441239B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2011214172A1 (en) * | 2010-02-09 | 2012-08-30 | Duvas Technologies Limited | Optical absorption spectroscopy with multi-pass cell with adjustable optical path length |
| CN105547386A (en) * | 2015-12-22 | 2016-05-04 | 河北大学 | Device and method for measuring gas and liquid two-phase flow in horizontal pipeline |
| CN105628108A (en) * | 2015-12-22 | 2016-06-01 | 河北大学 | Device and method for measuring flow of gas-liquid two phase fluids in vertical pipeline |
| CN105910663A (en) * | 2016-04-06 | 2016-08-31 | 河北大学 | Device and method for measuring flow of gas-liquid two-phase flow |
| CN108801377A (en) * | 2017-04-30 | 2018-11-13 | 南京理工大学 | A kind of Optical devices for specialized fluids flow velocity and flow measurement |
Non-Patent Citations (1)
| Title |
|---|
| 方立德: "新型气液两相流相含率检测装置特性研究", 《中国测试》 * |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20191112 Assignee: Hebei Youdi Technology Co.,Ltd. Assignor: HEBEI University Contract record no.: X2023980038989 Denomination of invention: A pipeline phase holdup detection system and method with adjustable optical path Granted publication date: 20210921 License type: Exclusive License Record date: 20230802 |
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