CN203704481U - Die for fabricating tracer ice particles used for measuring speed of surface flow field - Google Patents
Die for fabricating tracer ice particles used for measuring speed of surface flow field Download PDFInfo
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- CN203704481U CN203704481U CN201320882563.9U CN201320882563U CN203704481U CN 203704481 U CN203704481 U CN 203704481U CN 201320882563 U CN201320882563 U CN 201320882563U CN 203704481 U CN203704481 U CN 203704481U
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Abstract
The utility model discloses a die for fabricating tracer ice particles used for measuring the speed of a surface flow field. The die is provided with a front panel, a middle panel and a rear panel, wherein at least 4 semi-circular particle models are respectively and transversely formed at equal intervals on the contact surface between the front panel and the middle panel; at least 6 semi-circular particle models are respectively and longitudinally formed at equal intervals in the contact surface between the front panel and the middle panel; the particle models formed in the front panel and the middle panel form a circle; the bottoms of the front panel and the middle panel are in hinge connection; a clearance is formed between the front panel and the middle panel; the upper end of the clearance forms an injection opening; an air flow channel is formed between the middle panel and the rear panel; a through channel is formed in the bottom of the middle panel; one end of the through channel is communicated with the clearance between the front panel and the middle panel and the other end of the through channel is communicated with the air flow channel between the middle panel and the rear panel. According to the die for fabricating tracer ice particles used for measuring the speed of the surface flow field, the application effect of PTV in a complex light environment or complex water and sand environment are greatly improved and the surface flow field can be measured in an environment-friendly, convenient and rapid manner.
Description
Technical field
The present invention relates to a kind of surface flow field velocity-measuring system.Particularly relating to a kind of surface flow field testing the speed for river model test water surface flow field tests the speed with the making mould of ice particle track particle.
Background technology
Indoor physical experiments is the important means of hydraulic engineering Study on Problems, especially in recent years aspect river evolvement simulation, there are at present a large amount of researchers to utilize pond in laboratory to carry out moulding of fluvial morphology both at home and abroad, utilize bending in river simulating nature circle of manually moulding, to divide the branch of a river and the type river of going around differentiation, the rule developing to study fluvial morphology.In all water conservancy projects, river model experiment, the measurement of flow rate of water flow is one of of paramount importance measurement key element.
At present, the measuring method of flow rate of water flow is mainly divided into two large classes: the one, and single-point flow-speed measurement: for example traditional propeller type current meter or apply at present more acoustic Doppler velocimetry (ADV).But propeller type current meter certainty of measurement is lower, and acoustic Doppler velocimetry (ADV) is owing to there being minimum investigation depth (being generally 5cm), is not often suitable for shallow-water environment.In addition, Single-point velocity determination, because surveying work amount is too large, often can not be competent at the river model real-time measurement in flow field on a large scale.Equations of The Second Kind method is the flow field velocimetry based on particle picture, for example extensively adopt at present particle tracking image velocimetry (PTV), by the trace particle that is sprinkled into water surface is carried out to real time image collection, and the image gathering is carried out to particle identification, coupling and tracking, realize the Quick Measurement of flow field velocity on a large scale.The method has efficient feature, obtain and widely applied and further investigation, for example, patent of invention " physical model surface flow field real-time measurement system and post-processing approach thereof " (application number: 200910076713.5) disclose one flood control physical model testing surface flow field real-time measurement system and the post-processing approach thereof in water conservancy measurement technology field.Its technical scheme is that tracer grain is evenly scattered in water surface and makes it follow water movement, video camera is installed on the top of surface flow field and realizes outer synchronous by audio video synchronization device, the picture signal of movement of particles transfers to collecting image of computer card by video line and carries out analyzing and processing, obtains flow field velocity and fluidised form.Patent of invention " contactless river surface flow field imaging method for measurement " (application number: 201210346488.4) disclose a kind of contactless river surface flow field imaging method for measurement, realize near infrared imaging by install near infrared filter additional before imageing sensor, strengthen the brightness contrast between current tracer and water surface background, and by image is carried out to spatial domain high-pass filtering, suppress water surface optical noise; Then adopt fast Flourier cross correlation algorithm to carry out estimation of motion vectors, obtain the displacement vector of each analyzed area, finally realize the surface flow field Quick Measurement in occurring in nature river.
Limited by laboratory condition, current existing particle tracking image tests the speed (PTV) system in actual applications, still has many-sided problem and challenge.First, general large-scale water conservancy project, river model laboratory inner model size range are very large, and the light of water surface generally comprises the available light from experiment window, and the light of interior lighting system, light source variation and at random.In this case, be difficult to accomplish that the light of block mold water surface is even, actual water surface is often presenting the phenomenons such as light source inverted image is overlapping, the inhomogeneous reflection of light some observation on angle., flow rate of water flow more shallow in the depth of water is large (your the moral number that boils is larger) in the situation that, and the water surface generally also there will be external waviness, presents the effect that gleams of light are reflecting on waves in the river.In this case, the particle picture quality degradation that camera system is obtained, is difficult to identify exactly the trace particle in image.Secondly, the making of trace particle, shed with reclaimer operation process and have inconvenient part.Trace particle General Requirements density is slightly less than water body, to obtain preferably with water-based, the trace particle adopting at present generally becomes specific shape by certain material in factory process, for example, utility model " the high-performance trace particle of physical model surface flow field image measurement " (application number: 200720036750.X) adopts ABS material or PP material to become density close with Experimental Flowing Object with plaster of paris hybrid modulation, suppress with mould, ABS material or PP material are mixed with the plaster of paris, then adopt mixer modulation evenly, the mould inner pressure system of injection forms.Special trace particle must reclaim, otherwise can cause the waste of material and the environmental pollution of experiment reservoir, and some can cause the long-term pollution of reservoir unavoidably because reclaiming not exclusively the particle that leaks into reservoir with water.Again, develop physical model experiment for a large amount of rivers, for example flexure type, point branch of a river type and the type river evolvement simulation of going around, measured zone often exists a large amount of beaches, continent at random to distribute, if adopt traditional trace particle speed-measuring method, will have a large amount of particles to be gathered in river course seashore part, make flow field survey result become chaotic, in addition, throw loose trace particle by prolonged stay in seashore place or recirculating zone, brought challenge to the recovery of particle.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of surface flow field to test the speed with the making mould of ice particle track particle, utilize disposable Low-temperature Ice particle to replace the material trace particles such as traditional plastics, the effect of PTV in complicated light environment, the husky environment of complicated water can be greatly improved, and environmental friendliness, surface flow field measurement easily and efficiently can be realized.
The technical solution adopted in the present invention is: a kind of surface flow field tests the speed with the making mould of ice particle track particle, include the front panel, centre panel and the rear board that set gradually, on the face that described front panel and described centre panel contact, each leisure is laterally equally spaced is respectively formed with 4 above semicircular particle models, at longitudinal equally spaced semicircular particle model being formed with more than 6, the particle model forming in described front panel and described centre panel forms a circular configuration jointly for mutual correspondence forms.
Described front panel is that bottom-hinged is connected with described centre panel, and is formed with gap between front panel and described centre panel, and the upper end in described gap forms inlet.
Described centre panel with described rear board for being fixedly connected with, and be formed with gas channel between described centre panel and described rear board, bottom in centre panel is formed with through channel, the gap forming between front panel described in one end of described through channel is communicated with and described centre panel, the gas channel forming between the centre panel described in the other end of described through channel is communicated with and described rear board.
A kind of surface flow field of the present invention tests the speed with the making mould of ice particle track particle, can greatly improve the effect of PTV in complicated light environment, the husky environment of complicated water, and can realize environmental friendliness, surface flow field measurement easily and efficiently.There is following beneficial effect:
1, adopt infrared camera technology, in conjunction with ice particle Particle-beam Tracing, effectively avoided that water surface laboratory in is reflective, the interference to particle picture quality such as ripple, make measurement not affected by laboratory light environment.Count river model experiment for your moral of boiling of shallow water, the height with external waviness, traditional particle image speed-measuring system often can not be suitable for, and the technology still can be suitable for.
2, trace particle adopts special ice particle, because the density of ice is slightly larger than water, can freely float over water surface, has good in water-based.In the temperature of ice and common laboratory, water temperature differs 10～20 ℃, can on infrared image, produce good resolution with background.
3, ice particle trace particle, flowing through behind experiment measuring region, leaks into gathering ground, and is finally melted in water body, without recovery, and can not produce environmental pollution to laboratory reservoir.In addition, trace particle only needs freezing equipment and corresponding mould to prepare, and cost is very low.There is easy to use, environmental protection, advantage cheaply.
4, develop physical model experiment for river, for example flexure type, point branch of a river type and the type river evolvement simulation of going around, measured zone often exists a large amount of beaches, continent at random to distribute, if adopt traditional trace particle speed-measuring method, to there is a large amount of particles to be gathered in river course seashore part, make flow field survey result become chaotic, in addition, throw loose trace particle by prolonged stay in seashore place or recirculating zone, be difficult to reclaim.And utilize ice particle as trace particle, and can ingeniously utilize the thawing of ice particle, avoid this problem.
5, in ice particle melting process, particle diameter and surface temperature will change in time gradually, coordinate identification, the feature extraction of particle by infrared photography, can last and carry out rough estimate the motion of particle, contribute to understand flow field, whole river situation from macroscopic perspective, for river model experiment provides the valuable data message except flow velocity.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is the structural representation of Fig. 1 centre panel.
In figure
10: front panel 11: centre panel
12: rear board 13: inlet
14: particle model 15: through channel
16: gas channel 17: gap
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, a kind of surface flow field of the present invention is tested the speed and is described in detail with the making mould of ice particle track particle.
A kind of surface flow field of the present invention tests the speed with the making mould of ice particle track particle, include the front panel 10, centre panel 11 and the rear board 12 that set gradually, on both faces of contacting of described front panel 10 and described centre panel 11, each leisure is laterally equally spaced is respectively formed with 4 above semicircular particle models 14, at longitudinal equally spaced semicircular particle model 14 being formed with more than 6, the particle model 14 forming in described front panel 10 and described centre panel 11 forms a circular configuration jointly for mutual correspondence forms.
Described front panel 10 for bottom-hinged is connected, and is formed with gap 17 between front panel 10 and described centre panel 11 with described centre panel 11, and the upper end in described gap 17 forms inlet 13.
Described centre panel 11 with described rear board 12 for being fixedly connected with, and be formed with gas channel 18 between described centre panel 11 and described rear board 12, be formed with through channel 15 in the bottom of centre panel 11, the gap 17 forming between front panel 10 described in one end of described through channel 15 is communicated with and described centre panel 11, the gas channel 16 forming between the centre panel 11 described in the other end of described through channel 15 is communicated with and described rear board 12.The effect of through channel 15, gas channel 16 is to form the Natural communication of water body in mould, avoids air bound or is gathered in lower space.Adopt a kind of surface flow field of the present invention to test the speed as follows by the making Mold Making ice particle trace particle flow process of ice particle track particle:
(1) three deck panels of closed die, i.e. front panel 10, centre panel 11, rear board 12, and slowly inject clear water from mould water filling port 13, until fill.In this process, air will be discharged by through channel 15, gas channel 16;
(2) mould is put into refrigerator freezing, trace particle die hole place water body is formed ice hockey;
(3) take out mould, in air, after preset a period of time, open front panel 10, take out all ice hockey particles, and carry out in addition stored frozen;
(4) repeat above-mentioned steps, prepare a large amount of trace particles, during in order to experiment, use.
Claims (3)
1. a surface flow field tests the speed with the making mould of ice particle track particle, include the front panel (10) setting gradually, centre panel (11) and rear board (12), it is characterized in that, on both faces of contacting of described front panel (10) and described centre panel (11), each leisure is laterally equally spaced is respectively formed with 4 above semicircular particle models (14), at longitudinal equally spaced semicircular particle model (14) being formed with more than 6, the particle model (14) forming in described front panel (10) and described centre panel (11) is the mutual corresponding common circular configuration that forms that forms.
2. surface flow field according to claim 1 tests the speed with the making mould of ice particle track particle, it is characterized in that, described front panel (10) and described centre panel (11) are connected for bottom-hinged, and between front panel (10) and described centre panel (11), be formed with gap (17), the upper end of described gap (17) forms inlet (13).
3. surface flow field according to claim 1 tests the speed with the making mould of ice particle track particle, it is characterized in that, described centre panel (11) with described rear board (12) for being fixedly connected with, and be formed with gas channel (16) between described centre panel (11) and described rear board (12), be formed with through channel (15) in the bottom of centre panel (11), the gap (17) forming between front panel (10) described in one end of described through channel (15) is communicated with and described centre panel (11), the gas channel (16) forming between centre panel (11) described in the other end of described through channel (15) is communicated with and described rear board (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320882563.9U CN203704481U (en) | 2013-12-26 | 2013-12-26 | Die for fabricating tracer ice particles used for measuring speed of surface flow field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320882563.9U CN203704481U (en) | 2013-12-26 | 2013-12-26 | Die for fabricating tracer ice particles used for measuring speed of surface flow field |
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| CN203704481U true CN203704481U (en) | 2014-07-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973685A (en) * | 2016-07-03 | 2016-09-28 | 中国科学院寒区旱区环境与工程研究所 | Making device for artificial ice core |
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2013
- 2013-12-26 CN CN201320882563.9U patent/CN203704481U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973685A (en) * | 2016-07-03 | 2016-09-28 | 中国科学院寒区旱区环境与工程研究所 | Making device for artificial ice core |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20141226 |
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