Intelligent flood discharge fog and rain simulation test device based on program regulation and control

Abstract

The invention discloses a flood discharge fog and rain intelligent simulation test device based on program regulation and control, which relates to the technical field of indoor non-uniform rainfall simulation and comprises three modules, namely a fog and rain generation system, an intelligent regulation and control system and a digital twin platform. The fog and rain generation system is used for generating simulated fog and rain, the intelligent regulation and control system is used for receiving instructions of a device user and controlling the generated fog and rain to meet test requirements, and the digital twin platform is used for inputting fog and rain space distribution parameters by the device user and generating a three-dimensional rainfall field model. The device is accurate and fine in simulation effect, all the parts are detachably connected, operation is convenient, real high dam flood discharge fog and rain can be better restored, and the reliability of test results is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of indoor non-uniform rainfall simulation, and particularly relates to an intelligent simulation test device for flood discharge fog rain based on program control. BACKGROUND

[0002] Flood discharge atomization refers to a non-natural rainfall process and water mist diffusion phenomenon caused by water discharge of a water discharge structure. No matter which way of flood discharge is adopted by the water discharge structure, and no matter in which flow state the water flow is discharged and connected with the downstream, the atomization phenomenon will appear, especially for high dams that fully dissipate energy in the air, the problem of flood discharge atomization is particularly prominent. Generally speaking, the higher the water head and the greater the flow, the greater the rain intensity and the influence range of the flood discharge fog rain, and compared with the conventional natural rainfall process, the non-natural rainfall causes much more threat and damage to the auxiliary structures of the water conservancy hub and the downstream bank slope. The problem of flood discharge atomization not only relates to the construction economy and operation safety of the project, but also affects the surrounding environment and ecological safety. Therefore, it is necessary to carry out research on the influence of flood discharge fog rain on the project bank slope.

[0003] At present, there are three main methods for studying the flood discharge fog rain of water conservancy and hydropower projects: prototype observation, physical model test and numerical calculation. Prototype observation is a direct means to understand the phenomenon of flood discharge atomization, and is the basis for physical model test and numerical calculation, and provides valuable data for the theoretical research of flood discharge atomization and the partition protection of atomization engineering. Based on the collection of prototype observation data, some scholars statistically divided the atomization area into dense fog area, thin fog area and light fog area. Physical model test has the characteristics of intuition and system, and is an extension and supplement of prototype observation, which can be repeated without being limited by time and other conditions. At present, the simulation test of flood discharge atomization mainly includes two kinds: one is to carry out atomization research on a gravity-similar hydraulic model; the other is special simulation of atomization. Numerical calculation is a semi-theoretical and semi-empirical analysis method based on prototype observation and physical model test, and its significant feature is to deeply study the mechanism of flood discharge atomization on the basis of fully mastering and analyzing the prototype observation and physical model test data, to establish a mathematical model of flood discharge atomization for numerical simulation of the atomization process prototype, especially with the progress of computer technology, numerical calculation is getting more and more widely used.

[0004] At present, the rainfall environment adopted by indoor slope model test is mostly natural uniform rainfall, and there is little slope physical model test under fog rain environment. Compared with natural rainfall, flood discharge fog rain is different in that it is extremely uneven in distribution, especially along the elevation, and it is characterized by large rain intensity and fog-shaped raindrops. Therefore, it is difficult to truly reflect the change law of the engineering bank slope under the action of fog rain by taking natural uniform rainfall as the test environment. The present application relates to a kind of intelligent simulation test device and test method of flood discharge fog rain based on program control, which can realize the fine simulation of the rain intensity gradient of the test model slope surface. SUMMARY

[0005] The present application provides an intelligent simulation test device of flood discharge fog rain based on program control, which is composed of a fog rain generation system, an intelligent control system and a digital twin platform. By inputting the required fog rain spatial distribution parameters of the test, the intelligent control system receives the instructions and controls the fog rain generation system to generate fog rain with corresponding rain intensity in different elevation ranges of the slope model. The digital twin platform generates a three-dimensional rainfall field model in real time, providing an accurate and stable fog rain environment for indoor slope physical model test.

[0006] The present application achieves the above-mentioned purposes by the following technical solutions: An intelligent simulation test device of flood discharge fog rain based on program control, comprising a fog rain generation system, an intelligent control system and a digital twin platform. The fog rain generation system is used to generate simulated fog rain, the intelligent control system is used to receive instructions from the device user and control the generated fog rain to meet the test requirements, and the digital twin platform is used for the device user to input fog rain spatial distribution parameters and generate a three-dimensional rainfall field model.

[0007] In the foregoing intelligent simulation test device of flood discharge fog rain based on program control, the fog rain generation system is composed of a water supply tank, a water inlet pipe, a booster pump, a water delivery pipe, a water distribution pipe, an electromagnetic flow valve and a fogging nozzle group. The water supply tank is connected to the booster pump through the water inlet pipe, the booster pump is connected to the fogging nozzle group through the water delivery pipe and the water distribution pipe, and each fogging nozzle in the fogging nozzle group is provided with an independent electromagnetic flow valve. The electromagnetic flow valve is used to receive instructions to adjust the water flow.

[0008] In the foregoing intelligent simulation test device of flood discharge fog rain based on program control, the PID pressure controller in the intelligent control system is arranged at the outlet end of the booster pump, which can collect the pressure in the water supply pipeline in real time. The PID algorithm controller is included to dynamically adjust the water supply pressure of the booster pump and the opening degree of each electromagnetic flow valve.

[0009] The aforementioned program control-based flood discharge fog rain intelligent simulation test device includes a laser positioning system, which is arranged on the same height plane as the atomizing nozzle group and is used to measure the relative height of each row of nozzles of the atomizing nozzle group and the slope surface of the slope model.

[0010] The aforementioned program control-based flood discharge fog rain intelligent simulation test device includes a servo angle adjuster, which is embedded at the rotating shaft center of each row of the atomizing nozzle group and has an adjustable angle range of 0°-90° and a dynamic brake module.

[0011] The aforementioned program control-based flood discharge fog rain intelligent simulation test device includes a lifter, which is arranged on the support of the fog nozzle group and is used to control the water spraying height of the atomizing nozzle group.

[0012] The aforementioned program control-based flood discharge fog rain intelligent simulation test device includes a digital twin platform composed of a millimeter wave radar array, a multispectral imaging system and a human-computer interaction interface; the millimeter wave radar array is vertically downwardly installed above the fog rain coverage range, is used to capture the spatial distribution density and motion trajectory of raindrops and to monitor the fog rain intensity of each region in the fog rain coverage range in real time; the multispectral imaging system includes two high-resolution multispectral cameras, which are arranged at the top of the model box and the front side of the slope model, respectively, are used to collect the reflection characteristics of raindrops and to perform coloring fusion with the millimeter wave radar point cloud, and display a three-dimensional rainfall field model on the display.

[0013] The aforementioned program control-based flood discharge fog rain intelligent simulation test device includes a human-computer interaction interface, which is used for the user of the device to input the spatial distribution parameters of fog rain and to display the three-dimensional rainfall field model generated by the millimeter wave radar array and the multispectral imaging system after the device is started.

[0014] An experimental operation method of a program control-based flood discharge fog rain intelligent simulation test device includes the following steps: S1: A slope physical model is prefabricated in the model box, and a pore water pressure sensor, a water content sensor and a soil pressure sensor are embedded during the construction of the model slope, the slope is completed and maintained until the experimental requirements are met; S2: The device is installed, including the installation of the water supply tank, the booster pump, the water inlet pipe, the electromagnetic flow valve, the atomizing nozzle group, the PID pressure controller, the laser positioning system, the servo angle adjuster, the lifter, the radar array and the high-resolution multispectral camera; S3: The booster pump is manually turned on, the fog rain generation system is checked for whether it is airtight and whether there is a water leakage or air leakage phenomenon, and the laser positioning system is turned on to detect whether the laser emitting device emits laser vertically downward; S4: After the device has been checked and found to be correct, determine the rainfall intensity within different elevation ranges of the slope model, and input the spatial distribution parameters of fog and rain in the human-computer interaction interface, namely, each elevation range and the corresponding fog and rain intensity; after inputting the parameters, start the test. S5: After inputting the spatial distribution parameters of fog and rain, the PID pressure controller will preset the target pressure, and then the various modules of the device will start to work together; the fog and rain generation system will start to continuously supply water, which will be sprayed out through the booster pump, water supply pipe, water inlet pipe and atomizing nozzle; S6: The laser positioning system starts working. The laser emitting device emits a laser beam vertically from top to bottom to measure the relative distance between each row of nozzles and the slope surface of the slope model. The millimeter-wave radar array begins to capture the spatial distribution density and movement trajectory of raindrops, monitors the intensity of fog and rain in real time, and the multispectral imaging system begins to collect the reflection characteristics of raindrops and perform color fusion with the millimeter-wave radar point cloud, displaying the three-dimensional rainfall field model on the display of the human-computer interaction system. S7: If the fog and rain generated by the preset pressure does not meet the test requirements, the digital twin platform will automatically send a command to the intelligent control system. The PID pressure controller will start to automatically adjust the working pressure of the booster pump and control the opening of the electromagnetic flow valve to adjust the water flow rate of the nozzle. The servo tilt adjuster and the lifter will work together to adjust the water outlet angle and water outlet height of the nozzle until the fog and rain generated by the device meets the test requirements. S8: When it is necessary to conduct model tests under different fog and rain intensities, simply change the input fog and rain spatial distribution parameters; S9: Conduct subsequent model experiments, collect experimental data, and perform data processing; S10: Disassemble the test equipment and clean the test site.

[0015] Compared with existing technologies, the present invention provides a program-controlled intelligent simulation test device and test operation method for flood discharge fog and rain, which can provide an accurate and stable fog and rain environment for indoor slope physical model tests, and has the following beneficial effects: 1. This device allows users to input spatial distribution parameters of fog and rain through a human-computer interaction interface, including parameters such as rainfall intensity gradient and fogification elevation range. The digital twin platform will analyze the parameters and generate control commands to control the fog and rain generation system to generate the target fog and rain environment. The simulation effect is realistic and detailed, meeting the characteristics of actual flood discharge fog and rain. 2、The modules of the device will work together to dynamically adjust the generated fog rain, that is, the digital twin platform will send a change instruction to the intelligent control system in real time if the generated fog rain does not meet the test requirements, the PID pressure controller contains a PID algorithm, after receiving the instruction, the working pressure of the booster pump is automatically adjusted, and the opening of the electromagnetic flow valve, the servo tilt angle regulator and the elevator are also adjusted synchronously until the device generates fog rain that meets the test requirements, all operations are completed by the device self-adjustment, without manual adjustment by the device user, the operation is simpler, and the adjustment effect is more accurate than manual adjustment; 3、The digital twin platform will generate a three-dimensional rainfall field model in real time, which is convenient for the device user to observe the fog rain simulation effect in real time; 4、The device has simple structure and convenient operation, all components are detachably connected, and the device is convenient to install, disassemble, maintain and overhaul. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the test device of the present application; Figure 2 is a schematic view of the fog rain generating system of the present application; Figure 3 is a schematic view of the fogging nozzle group in the fog rain generating system of the present application; Figure 4 is a schematic view of the servo tilt angle regulator and the elevator of the present application; Figure 5 is a schematic view of the millimeter wave radar array and the multispectral imaging system of the present application.

[0017] The figure marks are: water supply tank 1, water inlet pipe 2, booster pump 3, PID pressure controller 4, water delivery pipe 5, water distribution pipe 6, electromagnetic flow valve 7, fogging nozzle group 8, servo tilt angle regulator 9, elevator 10, millimeter wave radar array 11, laser positioning system 12, multispectral imaging system 13. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0019] Embodiment. A program control based intelligent simulation test device for flood discharge fog rain, the structure is referred to Figures 1-5As shown, it comprises three modules of fog rain generating system, intelligent control system and digital twin platform. The fog rain generating system comprises a water supply tank 1, a water inlet pipe 2, a booster pump 3, a water delivery pipe 5, a water distribution pipe 6, an electromagnetic flow valve 7, and a fogging nozzle group 8. The electromagnetic flow valve 7 is arranged at the water inlet of each fogging nozzle. The intelligent control system comprises an integrated PID pressure controller 4, a laser positioning system 12, a servo tilt angle regulator 9, and a lifter 10. The PID pressure controller 4 is arranged at the outlet end of the booster pump 3, used for monitoring the output pressure of the booster pump 3 in real time and adjusting the motor speed of the booster pump in time. The laser positioning system 12 is arranged on the plane of the fogging nozzle group 8, used for calibrating the relative height of the nozzle and the slope model. The servo tilt angle regulator 9 is arranged on the rotating shaft of the nozzle group, used for controlling the water spraying angle of the fogging nozzle. The lifter 10 is used for adjusting the height of the fogging nozzle group. The digital twin platform comprises a millimeter wave radar array 11, a multi-spectral imaging system 13, and a human-computer interaction interface. The millimeter wave radar array 11 is arranged uniformly above the slope model. The multi-spectral imaging system 13 comprises two high-resolution multi-spectral cameras, arranged at the top of the model box and the front side of the slope model respectively.

[0020] When the device is used to provide a fog rain environment for a slope physical model test, first, the rain intensity in different elevation ranges of the slope is determined, and the spatial distribution parameters of the fog rain are input in the human-computer interaction interface, and then the test can be started. After the corresponding parameters are input, the modules start to work cooperatively, the fog rain generating system starts to supply and deliver water and sprays out from the fogging nozzle group 8, the laser positioning system 12 vertically emits laser beams from top to bottom, measures the relative distance of each nozzle to the slope model surface, and obtains the slope elevation data at the corresponding position, the millimeter wave radar 11 starts to capture the spatial distribution density and motion trajectory of raindrops, monitors the fog rain intensity in real time, the multi-spectral imaging system 13 collects the reflection characteristics of raindrops and performs coloring fusion with the millimeter wave radar point cloud, and displays a three-dimensional rainfall field model on the display. When the required fog rain for the test is not reached, the digital twin platform issues a change instruction, the PID pressure controller 4 starts to automatically adjust the working pressure of the booster pump 3, the electromagnetic flow valve 7 automatically adjusts the water flow of the nozzle, the servo tilt angle regulator 9 starts to automatically adjust the water spraying angle of each row of nozzles, and the lifter 10 automatically adjusts the height of the nozzle group, and each module cooperatively works dynamically until the test requirements are met.

[0021] The fog rain generating system is composed of a water supply tank 1, a water inlet pipe 2, a booster pump 3, a water delivery pipe 5, a water distribution pipe 6, an electromagnetic flow valve 7, and a fogging nozzle group 8. The specific connection mode is that the water supply tank 1 is connected with the booster pump 3 through the water inlet pipe 2, and the booster pump 3 is connected with the water delivery pipe 5.

[0022] The intelligent simulation test device for flood discharge fog rain based on program control according to claim 1 is characterized in that the PID pressure controller 4 in the intelligent control system is arranged at the outlet end of the booster pump 3, can collect the pressure in the water supply pipeline in real time, contains a PID algorithm controller, and realizes dynamic adjustment of the water supply pressure of the booster pump 3 and the opening degree of each electromagnetic flow valve 7.

[0023] The laser positioning system 12 and the atomizing nozzle group 8 are arranged on the same height plane, one laser emitting device is arranged for each row of atomizing nozzles, the laser is emitted vertically downward, and the relative height of each row of nozzles of the atomizing nozzle group 8 and the slope surface of the slope model is measured.

[0024] The servo tilt angle adjuster 9 is embeddedly arranged at the rotation axis of each row of the atomizing nozzle group 8, the adjustable angle range is 0°~90°, and a dynamic brake module is contained, the angle is automatically locked when the water outlet angle of the nozzle meets the requirement.

[0025] The lifter 10 is arranged on the support of the fog rain nozzle group 8 and is used for controlling the water spraying height of the atomizing nozzle group.

[0026] The millimeter wave radar array 11 is vertically downwardly arranged above the fog rain coverage range and is used for capturing the spatial distribution density and motion track of raindrops, and real-time monitoring the fog rain intensity in each region in the fog rain coverage range, the multi-spectrum imaging system 13 includes two high-resolution multi-spectrum cameras, which are arranged at the top of the model box and the front side of the slope model respectively, are used for collecting the reflection characteristics of raindrops and performing coloring fusion with the millimeter wave radar point cloud, and display the three-dimensional rainfall field model on the display.

[0027] The man-machine interaction interface is used for inputting the fog rain spatial distribution parameters by the user of the device and displaying the three-dimensional rainfall field model generated by the millimeter wave radar array 11 and the multi-spectrum imaging system 13 after the device is started.

[0028] The control logic of the intelligent control system is that the user of the device sets the required fog rain spatial distribution parameters, the laser positioning device 12 emits laser to position the distance between each row of nozzles and the slope surface, the PID pressure controller 4 starts to calculate the target pressure after receiving the fog rain spatial distribution parameters set by the user and the distance between each row of nozzles and the slope surface, controls the frequency converter of the booster pump 3 to reach the target pressure, controls the opening degree of the electromagnetic flow valve 7 at each nozzle at the same time, makes each row of nozzles of the atomizing nozzle group 8 generate fog rain with different intensities, the digital twin platform generates a three-dimensional rainfall field model in real time, compares the three-dimensional rainfall field model with the pre-set fog rain spatial distribution parameters in real time, and adjusts the output pressure of the booster pump 3 and the opening degree of each electromagnetic flow valve 7 in real time, the angle of the servo tilt angle adjuster 9 and the height of the lifter 10 are also automatically adjusted, until the expected rain intensity in each elevation range is reached.

[0029] The experimental operation method of the aforementioned intelligent simulation test device for flood discharge fog rain based on program control includes the following steps: S1: Preparing the physical model of the slope in the model box, burying the pore water pressure sensor, water content sensor and soil pressure sensor during the process of building the model slope, completing the slope production and maintenance until the experimental requirements are met; S2: The device is installed, including the installation of the water supply tank 1, booster pump 3, water inlet pipe 2, electromagnetic flow valve 7, atomizing nozzle group 8, PID pressure controller 4, laser positioning system 12, servo tilt angle regulator 9, lifter 10, radar array 11, high-resolution multispectral camera; S3: Manually turn on the booster pump 3, check if the mist and rain generating system is airtight, and if there is a water leakage or air leakage phenomenon; turn on the laser positioning system 12 to detect if the laser emitting device emits laser vertically downward; S4: After the device is checked and no error is found, determine the intensity of the rain in different elevation ranges of the slope model, input the spatial distribution parameters of the mist and rain, i.e. the elevation range and the corresponding mist and rain intensity, in the human-computer interaction interface; after inputting the parameters, start the test; S5: After inputting the spatial distribution parameters of the mist and rain, the PID pressure controller 4 will preset the target pressure, and then the modules of the device will start to work cooperatively; the mist and rain generating system starts to supply water continuously, which is sprayed out by the atomizing nozzle through the booster pump 3, water inlet pipe 5 and water inlet pipe 2; S6: The laser positioning system 12 starts to work, the laser emitting device emits laser beams vertically from top to bottom, measures the relative distance between each row of nozzles and the slope model surface, the millimeter wave radar array 11 starts to capture the spatial distribution density and motion trajectory of raindrops, monitors the intensity of the mist and rain in real time, the multispectral imaging system 13 starts to collect the reflection characteristics of raindrops and performs coloring fusion with the millimeter wave radar point cloud, and displays the three-dimensional rainfall field model on the display of the human-computer interaction interface system; S7: If the mist and rain formed by the preset pressure does not meet the test requirements, the digital twin platform will automatically issue instructions to the intelligent control system, the PID pressure controller 4 starts to automatically adjust the working pressure of the booster pump 3, controls the opening degree of the electromagnetic flow valve to adjust the water flow of the nozzle, and the servo tilt angle regulator 9 and the lifter 10 work cooperatively to adjust the water outlet angle and height of the nozzle, until the mist and rain generated by the device meets the test requirements; S8: When model tests under different mist and rain intensities are needed, change the input spatial distribution parameters of the mist and rain; S9: Expand the subsequent model test, collect test data, and process the data; S10: Disassemble the test device and clean the test site.

[0030] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and concept of the present application, can make equivalent replacements or changes within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A program-controlled intelligent simulation test device for flood discharge fog and rain, characterized in that: This includes a fog and rain generation system, an intelligent control system, and a digital twin platform; The fog and rain generation system is used to generate simulated fog and rain. The intelligent control system is used to receive instructions from the device user and control the generated fog and rain to meet the experimental requirements. The digital twin platform is used by the device user to input the spatial distribution parameters of fog and rain and generate a three-dimensional rainfall field model.

2. The intelligent simulation test device for flood discharge fog and rain based on program control according to claim 1, characterized in that, The mist and rain generation system consists of a water supply tank (1), an inlet pipe (2), a booster pump (3), a water delivery pipe (5), a water distribution pipe (6), an electromagnetic flow valve (7), and an atomizing nozzle assembly (8). The water supply tank (1) is connected to the booster pump (3) via the inlet pipe (2), and the booster pump (3) is connected to the atomizing nozzle assembly (8) via the water delivery pipe (5) and the water distribution pipe (6). Each atomizing nozzle in the atomizing nozzle assembly (8) is equipped with an independent electromagnetic flow valve (7), which is used to receive instructions to adjust the water flow rate.

3. The intelligent simulation test device for flood discharge fog and rain based on program control according to claim 2, characterized in that, The PID pressure controller (4) in the intelligent control system is located at the outlet of the booster pump (3). It can collect the pressure in the water supply pipeline in real time and contains a PID algorithm controller to dynamically adjust the water supply pressure of the booster pump (3) and the opening degree of each electromagnetic flow valve (7).

4. The intelligent simulation test device for flood discharge fog and rain based on program control according to claim 3, characterized in that, The system includes a laser positioning system (12), which is set on the same height plane as the atomizing nozzle group (8) to measure the relative height between each row of nozzles of the atomizing nozzle group (8) and the slope surface of the slope model.

5. The intelligent simulation test device for flood discharge fog and rain based on program control according to claim 4, characterized in that, It includes a servo tilt adjuster (9), which is embedded in the rotation axis of each row of atomizing nozzle group (8). The angle can be adjusted from 0° to 90°. It contains a dynamic braking module, which automatically locks the angle when the nozzle water outlet angle meets the requirements.

6. The intelligent simulation test device for flood discharge fog and rain based on program control according to claim 5, characterized in that, Includes a lifter (10), which is mounted on the bracket of the mist and rain nozzle assembly (8) and is used to control the water spray height of the atomizing nozzle assembly.

7. The intelligent simulation test device for flood discharge fog and rain based on program control according to claim 6, characterized in that, The digital twin platform consists of a millimeter-wave radar array (11), a multispectral imaging system (13), and a human-computer interaction interface. The millimeter-wave radar array (11) is installed vertically downward above the fog and rain coverage area to capture the spatial distribution density and movement trajectory of raindrops and monitor the fog and rain intensity in each area within the fog and rain coverage area in real time. The multispectral imaging system (13) includes two high-resolution multispectral cameras, which are respectively set on the top of the model box and the front side of the slope model to collect raindrop reflection characteristics and perform color fusion with the millimeter-wave radar point cloud to display a three-dimensional rainfall field model on the display.

8. The intelligent simulation test device for flood discharge fog and rain based on program control according to claim 7, characterized in that, The human-computer interaction interface is used by the device user to input the spatial distribution parameters of fog and rain, and displays the three-dimensional rainfall field model generated by the millimeter-wave radar array (11) and the multispectral imaging system (13) after the device is turned on.

9. The experimental operation method of the intelligent simulation test device for flood discharge fog and rain based on program control as described in claim 8, characterized in that, Includes the following steps: S1: Prefabricate the physical model of the slope in the model box, and embed pore water pressure sensor, water content sensor and soil pressure sensor during the construction of the model slope. Complete the slope construction and maintenance until the experimental requirements are met. S2: Complete the installation of the device, including the installation of water supply tank (1), booster pump (3), water inlet pipe (2), electromagnetic flow valve (7), atomizing nozzle group (8), PID pressure controller (4), laser positioning system (12), servo tilt adjuster (9), lifter (10), radar array (11), and high-resolution multispectral camera; S3: Manually turn on the booster pump (3) and check whether the fog and rain generation system is sealed and whether there is any water or air leakage; turn on the laser positioning system (12) and check whether the laser emitting device emits laser vertically downwards; S4: After the device has been checked and found to be correct, determine the rainfall intensity within different elevation ranges of the slope model, and input the spatial distribution parameters of fog and rain in the human-computer interaction interface, namely, each elevation range and the corresponding fog and rain intensity; after inputting the parameters, start the test. S5: After inputting the spatial distribution parameters of fog and rain, the PID pressure controller (4) will preset the target pressure, and then the modules of the device will start to work together; the fog and rain generation system will start to supply water continuously, which will be sprayed out through the booster pump (3), water supply pipe (5), water inlet pipe (2) and atomizing nozzle; S6: The laser positioning system (12) starts working, the laser emitting device emits a laser beam vertically from top to bottom, measures the relative distance between each row of nozzles and the slope surface of the slope model, the millimeter-wave radar array (11) starts capturing the spatial distribution density and movement trajectory of raindrops, monitors the intensity of fog and rain in real time, and the multispectral imaging system (13) starts collecting raindrop reflection characteristics and coloring and fusing them with the millimeter-wave radar point cloud, displaying the three-dimensional rainfall field model on the display of the human-computer interaction interface system; S7: If the fog and rain formed by the preset pressure does not meet the test requirements, the digital twin platform will automatically send an instruction to the intelligent control system. The PID pressure controller (4) will start to automatically adjust the working pressure of the booster pump (3) and control the opening of the electromagnetic flow valve to adjust the water flow rate of the nozzle. The servo tilt adjuster (9) and the lifter (10) work together to adjust the water outlet angle and water outlet height of the nozzle until the fog and rain generated by the device meets the test requirements. S8: When it is necessary to conduct model tests under different fog and rain intensities, simply change the input fog and rain spatial distribution parameters; S9: Conduct subsequent model experiments, collect experimental data, and perform data processing; S10: Disassemble the test equipment and clean the test site.

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