CN117686401A - Visual test device and method for simulating rainfall interval infiltration process - Google Patents
Visual test device and method for simulating rainfall interval infiltration process Download PDFInfo
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- CN117686401A CN117686401A CN202311666057.0A CN202311666057A CN117686401A CN 117686401 A CN117686401 A CN 117686401A CN 202311666057 A CN202311666057 A CN 202311666057A CN 117686401 A CN117686401 A CN 117686401A
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- 238000001764 infiltration Methods 0.000 title claims abstract description 44
- 230000008595 infiltration Effects 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 230000000007 visual effect Effects 0.000 title claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 238000005303 weighing Methods 0.000 claims description 43
- 244000035744 Hura crepitans Species 0.000 claims description 42
- 238000004088 simulation Methods 0.000 claims description 25
- 238000005086 pumping Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 15
- 239000002699 waste material Substances 0.000 claims description 15
- 238000011084 recovery Methods 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 13
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- 238000001704 evaporation Methods 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010998 test method Methods 0.000 abstract description 2
- 239000003673 groundwater Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 4
- 230000000750 progressive effect Effects 0.000 description 3
- 239000001045 blue dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- SGHZXLIDFTYFHQ-UHFFFAOYSA-L Brilliant Blue Chemical compound [Na+].[Na+].C=1C=C(C(=C2C=CC(C=C2)=[N+](CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C=2C(=CC=CC=2)S([O-])(=O)=O)C=CC=1N(CC)CC1=CC=CC(S([O-])(=O)=O)=C1 SGHZXLIDFTYFHQ-UHFFFAOYSA-L 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses a visual test device and a visual test method for simulating rainfall interval infiltration process, and relates to the technical field of rainfall infiltration research tests. The light transmission technology based on the lamberbil law can accurately capture the dynamic characteristics of a fluid interface under different rainfall interval conditions, so that the technical problem that the actual seepage pattern of the seepage cannot be observed in real time due to the fact that the existing rainfall infiltration experiment simulating the actual rainfall condition can only capture the moisture change in the soil column through a plurality of moisture meters in a three-dimensional model is solved; according to the invention, the electronic balance is placed at different vertical heights, so that the evaporation capacity and the deep replenishment capacity of the model can be accurately measured based on the law of conservation of mass. By the visual method, the change of the finger flow form can be observed at the same time, thereby being beneficial to understanding the influence of the finger flow on evaporation and deep replenishment.
Description
Technical Field
The invention relates to the technical field of rainfall infiltration research tests, in particular to a visual test device and method for simulating rainfall interval infiltration process.
Background
The global warming process is exacerbated and areas of arid and semiarid regions are continually expanding. Arid and semiarid regions, dry climate, strong evaporation, deficient surface water resources and relatively abundant groundwater resources. Is an important source of industrial and agricultural production and human living water in the area. However, in recent years, the continuous decline of groundwater levels, affected by human activity and climate change, can induce a series of geological environment and ecological problems. Groundwater is an important component of groundwater resources, and pollutants on the surface of pesticides, fertilizers and the like can infiltrate into a gas-wrapping belt and groundwater along with rainfall, so that the mechanism of supplementing groundwater by rainfall infiltration is important to research. The process of rainfall infiltration and groundwater supply relates to the processes of atmospheric precipitation, evaporation and the like. The infiltration replenishment process is affected by factors such as climate change, soil temperature and the like, particularly in arid and semiarid regions, rainfall is rare and strong in evaporation, a certain time is required for the rainfall to migrate from the ground surface to the submergence surface, and uncertainty of calculation of the evaporation quantity directly leads to uncertainty of replenishment quantity. Therefore, the rainfall infiltration replenishment dynamic change process under different rainfall intervals is difficult to directly observe, and the quantitative evaluation of the replenishment quantity of groundwater is faced with a great challenge.
Because deep stratum is generally located under the covering layer, the research on rainfall infiltration compensation for groundwater lacks an effective in-situ and real-time observation means. At present, the research on the rainfall infiltration replenishment rule is mainly based on a three-dimensional dyeing tracing seepage test, namely, a plurality of moisture meters are arranged in a model box to monitor the change of evaporation capacity, and finally, soil in the model box is taken out to perform microstructure analysis. At present, the research on rainfall infiltration replenishment rules at home and abroad is mostly focused on a field macroscopic scale, but the research on a microscopic mechanism is less; the research aiming at the mechanism is focused on the infiltration process of rainfall infiltration to deep stratum, and the two-dimensional visual research on the rainfall infiltration replenishment rule considering the influence of evaporation is less. According to the invention, a light transmission technology is combined with a mass conservation law, a set of visual test platform capable of simulating infiltration processes at different rainfall intervals is built, and the visual test platform is applied to the research on rainfall infiltration supply rules under different rainfall intervals. The test device can observe the seepage replenishment process of pore medium at different rainfall intervals in real time and measure the corresponding evapotranspiration. The method has considerable application value in fluid experiments and geochemical researches.
The existing rainfall infiltration process research for simulating real rainfall conditions and considering the influence of evaporation mainly adopts a three-dimensional model test, and a certain number of moisture meter probes are arranged to research the moisture change in the infiltration process, so that the rainfall infiltration compensation process cannot be visualized. Therefore, there is a need for a visual test device that simulates the infiltration process at different rainfall intervals.
Disclosure of Invention
In order to solve the technical problems, the invention provides a visual test device and a visual test method for simulating a rainfall interval infiltration process, and the dynamic monitoring quantification of a rainfall infiltration replenishment process considering real rainfall conditions and evapotranspiration influence is realized through a light transmission technology and a mass conservation law.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a visual test device for simulating rainfall interval infiltration process, which comprises a parallel light source, a camera, a monitoring system, a transparent sand box model, a first weighing mechanism, a second weighing mechanism and a rainfall simulation mechanism, wherein the parallel light source is arranged on the camera; the transparent sand box model is arranged between the parallel light source and the camera, and the rainfall simulation mechanism is used for injecting simulated rainwater into the transparent sand box model; the first weighing mechanism is arranged right below the transparent sand box model, and the second weighing mechanism is arranged below two sides of the transparent sand box model; the top of the first weighing mechanism is provided with a waste liquid recovery tank, the waste liquid recovery tank is used for receiving simulated rainwater which drips from the transparent sand box model, and the first weighing mechanism is used for collecting real-time quality change information of the waste liquid recovery tank; the second weighing mechanism is used for collecting quality change information of the transparent sand box model in real time; the camera, the first weighing mechanism, the second weighing mechanism and the rainfall simulation mechanism are all in electric control connection with the monitoring system.
Optionally, the first weighing mechanism comprises a second electronic balance, and the waste liquid recovery tank is arranged on the top of the second electronic balance.
Optionally, the second weighing mechanism includes a first electronic balance and a third electronic balance; a long bottom plate is arranged between the first electronic balance and the third electronic balance, and the transparent sand box model is arranged on the long bottom plate.
Optionally, a first metal backing plate is arranged below the first electronic balance, and a second metal backing plate is arranged below the third electronic balance; the first metal pad and the second metal pad are used for enabling the top of the first electronic balance and the top of the third electronic balance to be higher than the third electronic balance.
Optionally, the rainfall simulation mechanism comprises a rainfall simulation rain source and a fluid pumping device, wherein the fluid pumping device is communicated with the rainfall simulation rain source, and the rainfall simulation rain source is arranged at the top of the transparent sand box model.
Optionally, the fluid pumping device comprises a programmable syringe pump, a syringe and a tubing; the injector is arranged on the programmable injection pump, and the programmable injection pump is used for driving the injector; the pipeline is used for communicating the injector and the rainfall simulation rain source.
Optionally, a fixing frame is arranged between the parallel light source and the rainfall simulation mechanism, and the fixing frame is used for adjusting the distance between the parallel light source and the rainfall simulation mechanism.
The invention also provides a method of the visual test device based on the simulated rainfall interval infiltration process, which comprises the following steps,
s1: manufacturing a transparent sand box model;
s2: installing a test device on an optical platform, placing the manufactured transparent sand box model at the center of a second weighing mechanism, and opening a parallel light source and a camera to focus the visual field of the camera on the plane of the transparent sand box model;
s3: controlling a fluid pumping device, filling simulated rainwater into an injector, installing the injector, connecting a pipeline between the injector and a simulated rainfall source, setting pumping flow and rainfall interval, starting a switch, pumping the simulated rainwater into the simulated rainfall source at a constant speed, and then uniformly rainfall in a transparent sand box model;
s4: and (3) opening a monitoring system, adjusting the recording interval of the first weighing mechanism and the second weighing mechanism to enable the recording interval to be matched with the acquisition frame rate of the camera, opening a recording mode of the camera through the monitoring system, recording a flowing image of rainfall infiltration, and acquiring real-time quality change data on the first weighing mechanism and the second weighing mechanism.
Compared with the prior art, the invention has the following technical effects:
according to the visual test device and method for simulating the rainfall interval infiltration process, the dynamic characteristics of the fluid interface under different rainfall interval conditions can be accurately captured based on the light transmission technology of the lambert beer law, so that the technical problem that the infiltration finger flow form can only be reversely estimated by capturing the moisture change in the soil column through a plurality of moisture meters in a three-dimensional model in the existing rainfall infiltration experiment simulating the real rainfall condition, and the finger flow real form can not be observed in real time is solved; according to the invention, the electronic balance is placed at different vertical heights, so that the evaporation capacity and the deep replenishment capacity of the model can be accurately measured based on the law of conservation of mass. By the visual method, the change of the finger flow form can be observed at the same time, thereby being beneficial to understanding the influence of the finger flow on evaporation and deep replenishment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a visual test device for simulating rainfall interval infiltration process.
Fig. 2 is a schematic structural view of the connection between the fixing frame and the light source and the rainfall simulation mechanism in the invention.
Reference numerals illustrate: 1. an LED parallel light source; 2. a first electronic balance; 3. a first metal backing plate; 4. a second electronic balance; 5. a third electronic balance; 6. a transparent sand box model; 7. simulating a rainfall rain source; 8. a CCD camera; 9. a fluid pumping device; 10. a monitoring system; 11. a second metal backing plate; 12. a fixing frame; 13. a waste liquid recovery tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
as shown in fig. 1 and 2, the present embodiment provides a visual test device for simulating a rainfall interval infiltration process, which comprises a parallel light source, a camera, a monitoring system 10, a transparent sand box model 6, a first weighing mechanism, a second weighing mechanism and a rainfall simulation mechanism; the transparent sand box model 6 is arranged between the parallel light source and the camera, and the rainfall simulation mechanism is used for injecting simulated rainwater into the transparent sand box model 6; the first weighing mechanism is arranged right below the transparent sand box model 6, and the second weighing mechanism is arranged below two sides of the transparent sand box model 6; the top of the first weighing mechanism is provided with a waste liquid recovery tank 13, the waste liquid recovery tank 13 is used for receiving liquid flowing out from the outlet of the lower part of the transparent sand box model 6, and the first weighing mechanism is used for collecting real-time quality change information of the waste liquid recovery tank 13; the second weighing mechanism is used for collecting the quality change information of the transparent sand box model 6 in real time; the camera, the first weighing mechanism, the second weighing mechanism and the rainfall simulation mechanism are all electrically connected with the monitoring system 10.
In this embodiment, the parallel light source adopts an LED parallel light source 1 for providing stable illumination intensity during the visual test and illuminating the field of view.
The camera employs a CCD camera 8 for capturing optical image information at a set frame rate.
The simulated rainwater is dyed water, and in this embodiment, a brilliant blue dye solution with a concentration of 0.125g/L is used.
The first weighing mechanism comprises a second electronic balance 4, and a waste liquid recovery tank 13 is arranged on the top of the second electronic balance 4. The second weighing mechanism comprises a first electronic balance 2 and a third electronic balance 5; a long bottom plate is arranged between the first electronic balance 2 and the third electronic balance 5, and the transparent sand box model 6 is connected with the long bottom plate through glue.
A first metal base plate 3 is arranged below the first electronic balance 2, and a second metal base plate 11 is arranged below the third electronic balance 5; the first and second metal pads 11 are used to make the top of the first and third electronic balances 2 and 5 higher than the second electronic balance 4 so that a waste liquid recovery tank 13 is placed on top of the second electronic balance 4 for recovering waste liquid. The thickness of the first metal pad and the second metal pad 11 were each 20 cm.
The simulated rainfall mechanism comprises a simulated rainfall rain source 7 and a fluid pumping device 9, wherein the fluid pumping device 9 is communicated with the simulated rainfall rain source 7, and the simulated rainfall rain source 7 is arranged at the top of the transparent sand box model 6.
The fluid pumping device 9 comprises a programmable syringe pump, a syringe and tubing; the injector is arranged on a programmable injection pump, and the programmable injection pump is used for driving the injector; the pipeline is used for communicating the injector with the simulated rainfall rain source 7.
A fixing frame 12 is arranged between the parallel light source and the rainfall simulation mechanism, the fixing frame 12 comprises a micro progressive device and a bolt, the fixing frame 12 is connected with the light source fixing frame through the bolt, and is connected with the rainfall simulation mechanism through the micro progressive device. The simulated rainfall source 7 is fixed right above the middle part of the transparent sand box model 6 by adjusting the micro progressive device, and the fixing frame 12 is used for adjusting the distance between the parallel light source and the simulated rainfall mechanism. The distance between the parallel light source and the rainfall simulation mechanism in the horizontal direction is adjusted by adjusting the relative position of the fixing frame 12 and the light source fixing frame; the position of the simulated rainfall mechanism in the vertical direction can be adjusted by adjusting the micro-progressive device.
The monitoring system 10 comprises a computer for analyzing the data of the CCD camera 8 and controlling the CCD camera 8 to work synchronously with the data acquisition of the first electronic balance 2, the second electronic balance 4 and the third electronic balance 5.
Embodiment two:
the invention also provides a method of a visual test device based on the simulated rainfall interval infiltration process in the first embodiment, which comprises the following steps,
s1: manufacturing a transparent sand box model 6;
s2: a test device is arranged on an optical platform, a manufactured transparent sand box model 6 is placed at the center positions of a first electronic balance 2 and a third electronic balance 5, an LED parallel light source 1 and a CCD camera 8 are turned on, and the view of the CCD camera 8 is focused on the plane of the transparent sand box model 6;
s3: controlling a fluid pumping device 9, filling a bright blue dye solution with the concentration of 0.125g/L into an injector, installing the injector, connecting a pipeline between the injector and a simulated rainfall rain source 7, setting pumping flow and rainfall interval, starting a switch, pumping the simulated rain into the simulated rainfall source 7 at a constant speed, and then uniformly rainfall in a transparent sand box model 6;
s4: the monitoring system 10 is opened, the recording intervals of the first electronic balance 2, the second electronic balance 4 and the third electronic balance 5 are adjusted to be matched with the acquisition frame rate of the CCD camera 8, the recording mode of the CCD camera 8 is started through the monitoring system 10, the flowing image of rainfall infiltration is recorded, and real-time mass change data on the first electronic balance 2, the second electronic balance 4 and the third electronic balance 5 are acquired.
It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. The visual test device for simulating the rainfall interval infiltration process is characterized by comprising a parallel light source, a camera, a monitoring system, a transparent sand box model, a first weighing mechanism, a second weighing mechanism and a rainfall simulation mechanism;
the transparent sand box model is arranged between the parallel light source and the camera, and the rainfall simulation mechanism is used for injecting simulated rainwater into the transparent sand box model; the first weighing mechanism is arranged right below the transparent sand box model, and the second weighing mechanism is arranged below two sides of the transparent sand box model; the top of the first weighing mechanism is provided with a waste liquid recovery tank, the waste liquid recovery tank is used for receiving simulated rainwater which drips from the transparent sand box model, and the first weighing mechanism is used for collecting real-time quality change information of the waste liquid recovery tank; the second weighing mechanism is used for collecting quality change information of the transparent sand box model in real time;
the camera, the first weighing mechanism, the second weighing mechanism and the rainfall simulation mechanism are all in electric control connection with the monitoring system.
2. The visual test device for simulating rainfall interval infiltration process of claim 1, wherein the first weighing mechanism comprises a second electronic balance, and the waste liquid recovery tank is arranged on top of the second electronic balance.
3. The visual test device for simulating a rainfall interval infiltration process of claim 2, wherein the second weighing mechanism comprises a first electronic balance and a third electronic balance; the first electronic balance and the third electronic balance are connected through the long bottom plate of the transparent sand box model, and the transparent sand box model is tightly connected with the long bottom plate through glue.
4. The visual test device for simulating rainfall interval infiltration process of claim 3, wherein a first metal backing plate is arranged below the first electronic balance, and a second metal backing plate is arranged below the third electronic balance; the first metal pad and the second metal pad are used for enabling the top of the first electronic balance and the top of the third electronic balance to be higher than the second electronic balance.
5. The visual test device for simulating a rainfall interval infiltration process of claim 1, wherein the rainfall simulation mechanism comprises a rainfall simulation source and a fluid pumping device, the fluid pumping device is communicated with the rainfall simulation source, and the rainfall simulation source is arranged at the top of the transparent sand box model.
6. The visual test device for simulating a rainfall interval infiltration process of claim 5, wherein the fluid pumping device comprises a programmable syringe pump, a syringe and a tubing; the injector is arranged on the programmable injection pump, and the programmable injection pump is used for driving the injector; the pipeline is used for communicating the injector and the rainfall simulation rain source.
7. The visual test device for simulating rainfall interval infiltration process according to claim 1, wherein a fixing frame is arranged between the parallel light source and the simulated rainfall mechanism, and the fixing frame is used for adjusting the distance between the parallel light source and the simulated rainfall mechanism.
8. A method of a visual test device for simulating a rainfall interval infiltration process according to any one of the claims 1 to 7, comprising the steps of,
s1: manufacturing a transparent sand box model;
s2: installing a test device on an optical platform, placing the manufactured transparent sand box model at the center of a second weighing mechanism, and opening a parallel light source and a camera to focus the visual field of the camera on the plane of the transparent sand box model;
s3: controlling a fluid pumping device, filling simulated rainwater into an injector, installing the injector, connecting a pipeline between the injector and a simulated rainfall source, setting pumping flow and rainfall interval, starting a switch, pumping the simulated rainwater into the simulated rainfall source at a constant speed and a constant rainfall interval, and then uniformly rainfall in a transparent sand box model;
s4: and (3) opening a monitoring system, adjusting the recording interval of the first weighing mechanism and the second weighing mechanism to enable the recording interval to be matched with the acquisition frame rate of the camera, opening a recording mode of the camera through the monitoring system, recording a flowing image of rainfall infiltration, and acquiring real-time quality change data on the first weighing mechanism and the second weighing mechanism.
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| CN202311666057.0A CN117686401A (en) | 2023-12-07 | 2023-12-07 | Visual test device and method for simulating rainfall interval infiltration process |
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| CN202311666057.0A CN117686401A (en) | 2023-12-07 | 2023-12-07 | Visual test device and method for simulating rainfall interval infiltration process |
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- 2023-12-07 CN CN202311666057.0A patent/CN117686401A/en active Pending
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| CN104330533A (en) * | 2014-10-30 | 2015-02-04 | 中国矿业大学 | Testing device and method for simulating collapse of tunnel surrounding rock under conditions of rainfall and underground water seepage |
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