Artificial rainfall simulation device based on fine regulation and control of water pressure and control method

Abstract

The embodiment of the invention provides an artificial rainfall simulation device based on fine regulation and control of water pressure and a control method. The rainfall control method of the artificial rainfall simulation device based on fine regulation and control of the water pressure comprises the following steps: S1, acquiring measured rainfall change data; s2, sampling based on the measured rainfall change data to obtain target rainfall change data; s3, obtaining an output value of a corresponding intelligent pressure regulator based on each target rainfall in the target rainfall change data, so as to obtain a change pressure output value; wherein the obtained variable pressure output value is used for water output of each water pump. By recording the actual rainfall change data and sampling based on a certain time interval, the rainfall change closest to the real rainfall time can be simulated; in addition, by obtaining the relation between the pressure value of the water pressure regulator and the rainfall, the real rainfall can be accurately reproduced.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial rainfall, and in particular to an artificial rainfall simulation device and a control method based on fine regulation of water pressure. Background Art

[0002] Rainfall is one of the important factors that induce geological disasters. The migration path and movement law of water in the soil under rainfall conditions have always attracted the attention of scholars at home and abroad. Among them, field in-situ experiments are an important method for studying water infiltration in the soil. Accurately reflecting the typical rainfall events in the study area is the key to conducting water infiltration research. However, in field experiments, the uncertainty of rainfall leads to a long research cycle and it is difficult to obtain ideal results. The artificial rainfall method simulates natural rainfall through a rainfall device, which can truly reflect the changes in soil water infiltration during natural rainfall. It is a widely used method. At the same time, through the method of artificially simulating rainfall, the experimental process can be easily controlled, the experimental cycle can be shortened, and the shortcomings of natural rainfall can be effectively overcome.

[0007] Therefore, there is a need for an artificial rainfall test device that can finely control rainfall intensity distribution and simulate the shape of real raindrops. Summary of the invention

[0008] In view of the deficiencies in the prior art, the present invention provides an artificial rainfall simulation device and a control method based on fine regulation of water pressure, which solves the problem of inaccurate artificial rainfall control in the prior art.

[0009] In a first aspect, according to an embodiment of the present invention, there is provided a rainfall control method for an artificial rainfall simulation device based on fine-grained regulation of water pressure, comprising the following steps: S1, acquiring measured rainfall change data; S2, obtaining target rainfall change data based on sampling of the measured rainfall change data; S3, obtaining the output value of a corresponding intelligent pressure regulator based on each target rainfall in the target rainfall change data to obtain a variable pressure output value; wherein the obtained variable pressure output value is used for the water output of each water pump.

[0010] According to an embodiment of the present invention, the measured rainfall change data is stored in a document format, and the document format includes a txt format and an Excel format.

[0011] According to an embodiment of the present invention, obtaining target rainfall change data based on sampling of measured rainfall change data includes: S21, identifying the time column and rainfall column in the measured rainfall change data; S22, filtering some moments in the time column at a preset sampling time interval, and obtaining the rainfall value at the corresponding moment; S23, forming the target rainfall change data with the sampled moment and the corresponding rainfall value.

[0012] According to an embodiment of the present invention, the relationship between artificial rainfall and water pressure is:

[0013] R f =1.394p,

[0014] Among them, R f indicates rainfall and p indicates water pressure.

[0015] In a second aspect, according to another embodiment of the present invention, there is provided an artificial rainfall simulation device based on fine-grained regulation of water pressure, comprising: a controller, which adopts a rainfall control method for an artificial rainfall simulation device based on fine-grained regulation of water pressure as described in the first aspect to obtain a changing pressure value of an intelligent pressure regulator; a water tank, which is used to provide water; a water pump, which comprises a water inlet and a water outlet, wherein the water inlet is connected to the water tank, and the water outlet is connected to a plurality of rainmakers via an intelligent pressure regulator and a water pipe; an intelligent pressure regulator, which is used to control the water outlet pressure of the water outlet according to the changing pressure value provided by the controller; and a grid rainfall framework, which is arranged with water pipes and a plurality of rainmakers, and the plurality of rainmakers complete rainfall through the water pipes.

[0016] According to another embodiment of the present invention, the controller and the intelligent pressure regulator are connected via wireless communication.

[0017] According to another embodiment of the present invention, the grid rainfall framework is telescopic.

[0018] According to another embodiment of the present invention, an intelligent pressure regulator is provided for each row of the grid rainfall framework, wherein each rainmaker is installed at each node of the grid rainfall framework.

[0019] According to another embodiment of the present invention, the rainmaker is in the shape of a needle, wherein a hydrophilic coating is applied inside the rainmaker.

[0020] According to another embodiment of the present invention, the number of the rainmakers is determined based on the coverage area of ​​each rainmaker and the experimental area.

[0021] The technical principle of the present invention is: by recording the actual rainfall change data and sampling based on a certain time interval, the rainfall change closest to the actual rainfall time can be simulated; in addition, by obtaining the relationship between the pressure value of the water pressure regulator and the precipitation, the aforementioned actual rainfall can be accurately reproduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Flow chart of a rainfall control method according to an embodiment of the present invention.

[0023] Figure 2 It is a curve chart of measured rainfall change data according to an embodiment of the present invention.

[0024] Figure 3 Graph showing target rainfall variation data according to an embodiment of the present invention.

[0025] Figure 4 FIG. 4 is a graph showing rainfall and water pressure according to an embodiment of the present invention.

[0026] Figure 5 Schematic diagram of target rainfall variation data and water pressure variation curve according to an embodiment of the present invention.

[0027] Figure 6 Schematic diagram of a grid rainfall framework according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] As described in the background technology, the prior art lacks an artificial rainfall test device that can finely control the rainfall intensity distribution and simulate the real raindrop shape. Figure 1 As shown, the embodiment of the present invention proposes a rainfall control method for an artificial rainfall simulation device based on fine water pressure regulation, including the following steps: S1, obtaining measured rainfall change data; S2, sampling based on the measured rainfall change data to obtain target rainfall change data; S3, obtaining the output value of the corresponding intelligent pressure regulator based on each target rainfall in the target rainfall change data to obtain a variable pressure output value; wherein the obtained variable pressure output value is used for the water output of each water pump. By recording the actual rainfall change data and sampling based on a certain time interval, the rainfall change closest to the actual rainfall time can be simulated; in addition, by obtaining the relationship between the pressure value of the water pressure regulator and the precipitation, the aforementioned actual rainfall can be accurately reproduced.

[0030] According to an embodiment of the present invention, the measured rainfall change data is stored in a document format, and the document format includes a txt format and an Excel format, but is not limited to the formats.

[0031] According to an embodiment of the present invention, obtaining target rainfall change data based on the measured rainfall change data sampling includes: S21, identifying the time column and rainfall column in the measured rainfall change data; S22, filtering some moments in the time column at a preset sampling time interval, and obtaining the rainfall value at the corresponding moment; S23, forming the target rainfall change data with the sampled moment and the corresponding rainfall value. Detailed examples are as follows. Figure 2 The rainfall recorded in two hours is shown. It can be seen that the rainfall intensity changes from 1.5mm / h to 4mm / h, and the time interval in the time column of the measured rainfall change data is very small, for example, 1 minute. Next, in order to facilitate the test control, the measured rainfall change data is sampled at 5-minute intervals. The sampled data is shown in Figure 3 As shown, it can be seen that each column represents the rainfall at that moment.

[0032] In order to accurately control the rainfall of the rainfall device, the relationship between the water pressure of the intelligent pressure regulator and the obtained rainfall was tested. According to an embodiment of the present invention, the relationship is:

[0033] R f =1.394p,

[0034] Among them, R f indicates rainfall, and p indicates water pressure. The specific corresponding relationship is Figure 4 It can be seen that in most cases, rainfall and water pressure satisfy this linear relationship.

[0035] Combined with the target rainfall obtained above, the corresponding water pressure value can be calculated. The corresponding results are as follows Figure 5 As shown, each column still represents the precipitation, and each box on the curve represents the pressure value of the intelligent pressure regulator at this time.

[0036] In order to realize the rainfall process, according to another embodiment of the present invention, there is provided an artificial rainfall simulation device based on fine regulation of water pressure, comprising: a controller, which adopts a rainfall control method of an artificial rainfall simulation device based on fine regulation of water pressure as described above to obtain a changing pressure value of an intelligent pressure regulator; a water tank, which is used to provide water; a water pump, which comprises a water inlet and a water outlet, wherein the water inlet is connected to the water tank, and the water outlet is connected to a plurality of rainmakers via an intelligent pressure regulator and a water pipe; an intelligent pressure regulator, which is used to control the water outlet pressure of the water outlet according to the changing pressure value provided by the controller; and a grid rainfall framework, which is arranged with water pipes and a plurality of rainmakers, and the plurality of rainmakers complete rainfall through the water pipes.

[0037] In order to increase the independence and intelligence between the components, according to another embodiment of the present invention, the controller and the intelligent pressure regulator are connected via wireless communication. The intelligent pressure regulator receives the pressure signal via wireless communication and can provide a stable water pressure for the rain generator outlet. Among them, the intelligent pressure regulator can simulate the rainfall intensity within the range of 0-60mm / h. The method of adjusting the rainfall intensity by water pressure can not only achieve high precision and flexibility, but also improve the reliability and automation level of the simulation process.

[0038] In addition, for the portability of the entire device, according to another embodiment of the present invention, the grid rainfall frame is telescopic. Therefore, the grid rainfall frame can adjust the frame size according to the scale of the test site, and can be quickly deployed and disassembled, thereby saving time and labor. In addition, the grid rainfall frame is arranged at uniform intervals to ensure uniform distribution of the rainmakers and thus improve the uniformity of rainfall.

[0039] In addition, in order to further ensure the uniformity of rainfall, each row of the grid rainfall framework is provided with an intelligent pressure regulator, wherein each rain gauge is installed at each node of the grid rainfall framework. Figure 6 As shown, 5 rows of rainmakers and 5 intelligent pressure regulators are shown. When there are a large number of rainmakers, each row of rainmakers is supplied with water by a separate water pipe, and each water pipe is connected to an intelligent pressure regulator so that the water pressure of each rainmaker is kept consistent. As is known, the rainfall uniformity index is:

[0040]

[0041] Among them, U represents the uniformity of rainfall, R i Indicates the rainfall in the time period; i indicates any rainfall measuring point; n indicates the number of rain gauges; It indicates the average rainfall in a period of time. From the above formula, it can be seen that the closer the rainfall between rainfall measurement points, the better the rainfall uniformity index.

[0042] In order to make the raindrops formed by the rainmaker closer to the state of natural rainfall, according to another embodiment of the present invention, the rainmaker is in the shape of a needle, wherein a hydrophilic coating is applied inside the rainmaker. The hydrophilic coating is polyacrylic acid, polyvinyl alcohol, etc., which makes it easier for water to spread on the surface and form small water drops closer to the natural state.

[0043] According to another embodiment of the present invention, the grid rainfall frame can be arranged on a bracket, and the bracket has a telescopic function, and the height of the rainmaker can be flexibly adjusted according to test needs.

[0044] In addition, wind can affect the falling trajectory and speed of raindrops, resulting in uneven and uncontrollable rainfall. In order to ensure the accuracy of the simulated rainfall event, according to another embodiment of the present invention, a windproof curtain is arranged around the bracket. The curtain can effectively block the interference of wind on the rainfall experiment, and can also prevent external debris, dust or other stray materials from entering the experimental area.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A rainfall control method for an artificial rainfall simulation device based on fine-grained water pressure regulation, characterized in that: The following steps are involved: S1. Obtaining measured rainfall change data; S2, obtaining target rainfall change data based on the measured rainfall change data sampling; S3, obtaining an output value of a corresponding intelligent pressure regulator based on each target rainfall in the target rainfall variation data to obtain a variation pressure output value; The obtained variable pressure output value is used for the water output of each water pump.

2. The rainfall control method of the artificial rainfall simulation device based on fine water pressure regulation according to claim 1 is characterized in that: The measured rainfall change data is stored in file formats, including txt format and Excel format.

3. The rainfall control method of the artificial rainfall simulation device based on fine water pressure regulation according to claim 2 is characterized in that: The target rainfall change data obtained based on the measured rainfall change data sampling includes: S21, identifying the time column and the rainfall column in the measured rainfall change data; S22, filtering some moments in the time column at a preset sampling time interval, and obtaining the rainfall value at the corresponding moment; S23. Form target rainfall change data using the sampling time and the corresponding rainfall value.

4. The rainfall control method of the artificial rainfall simulation device based on fine water pressure regulation according to claim 1 is characterized in that: The relationship between rainfall and water pressure is: R f =1.394p, Among them, R f indicates rainfall and p indicates water pressure.

5. An artificial rainfall simulation device based on fine-grained regulation of water pressure, characterized in that: include: The controller adopts a rainfall control method of an artificial rainfall simulation device based on fine water pressure regulation as described in any one of claims 1 to 4 to obtain a change pressure value of the intelligent pressure regulator; A water tank for providing water; A water pump, comprising a water inlet and a water outlet, wherein the water inlet is connected to a water tank, and the water outlet is connected to a plurality of rain generators via an intelligent pressure regulator and a water pipe; An intelligent pressure regulator, used for controlling the water outlet pressure of the water outlet according to the changing pressure value provided by the controller; The grid rainfall framework is arranged with water pipes and a plurality of rainmakers, and the plurality of rainmakers complete rainfall through the water pipes.

6. The artificial rainfall simulation device based on fine water pressure control as claimed in claim 5, characterized in that: The controller and the intelligent pressure regulator are connected via wireless communication.

7. The artificial rainfall simulation device based on fine water pressure control according to claim 5, characterized in that: The grid rainfall frame is telescopic.

8. The artificial rainfall simulation device based on fine water pressure control as claimed in claim 5, characterized in that: Each row of the grid rainfall framework is provided with an intelligent pressure regulator, wherein each rainmaker is installed at each node of the grid rainfall framework.

9. The artificial rainfall simulation device based on fine water pressure control according to claim 5, characterized in that: The rainmaker is in the shape of a needle, wherein a hydrophilic coating is applied inside the rainmaker.

10. The artificial rainfall simulation device based on fine water pressure control according to claim 5, characterized in that: The number of the rainmakers is determined based on the coverage area of ​​each rainmaker and the experimental area.

Images