A terrain control device and method based on a variable airbag array

Abstract

The application belongs to the technical field of terrain simulation, and provides a terrain control device and method based on a variable air bag array. The application is based on the structure of the variable air bag, independently controls the inflation and deflation state of each air bag in the array, dynamically changes the flexible rubber film covering above the air bag in real time, realizes high-precision simulation of the surface topography, and significantly improves the response efficiency of the dynamic adjustment of the terrain in the experimental process. At the same time, the design greatly reduces the experimental material and labor cost.

Description

Technical Field

[0001] This invention belongs to the field of terrain simulation technology, specifically relating to a terrain control device and method based on a variable airbag array. Background Technology

[0002] Sedimentary simulation is an important experimental tool and technique in sedimentological theoretical research, and can be divided into numerical simulation and physical simulation. Physical simulation is an indoor simulation of the physical processes of sediments, recreating the sedimentary processes of natural sediments in the laboratory by simulating the sedimentary conditions at the time. Initially, physical simulation experiments were mostly used in hydrological and fluvial geomorphological studies, and only in the last 20 years has the focus been on simulating the formation process and evolution of lacustrine sedimentary sand bodies.

[0003] The experimental base plate is a core subsystem of the sedimentary simulation laboratory, used to accurately simulate the subsidence and uplift processes of basin basements under tectonic movements and sedimentary compaction. Its technological development revolves around the goals of high-precision, large-scale, and multi-dimensional simulation, forming a mature system. Current technology primarily uses electric screw drives, employing servo motors to drive high-precision ball screws to achieve the lifting and lowering of each independent drive point. This technology offers high control precision and a wide simulation range. The base plate generally adopts a modular design, assembled from high-strength aluminum alloy or composite material modules. The modules are covered by high-performance flexible sealing materials, allowing relative movement while effectively preventing experimental media from intruding into the precision drive mechanism. A precise guiding mechanism ensures the stability of the module lifting process, making this technical solution the preferred choice for newly built high-end laboratories.

[0004] However, existing technologies have the following problems: 1. The cost of a single experiment is high. The experiment requires a second laying of the base, which requires a large amount of sediment such as mud and clay, increasing the cost of materials. The water circulation, base lifting and tilting control, and data acquisition system of the large water tank operate for a long time, consuming a lot of electricity. The experiment uses a lot of water, and the water treatment and circulation costs are also high. 2. The connecting parts between the base plates are made of rubber, and the rubber joints have poor support and are prone to deformation; 3. High resolution and large scale are difficult to achieve simultaneously. Increasing the density of driving points (improving spatial resolution) will exponentially increase cost and mechanical complexity. 4. Current technologies all use a single base plate with four support points to control terrain simulation. Since a single base plate cannot deform and is controlled by four support points, the control accuracy is not high. If the area of ​​a single base plate is too large, the simulation accuracy is low. If the base plate is reduced in size, the number of support points on the base plate must be increased exponentially to achieve the same simulation effect, which will increase the cost and the difficulty of control. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a terrain control device and method based on a variable airbag array, thereby resolving the issues in the prior art. The technical solution adopted by this invention is as follows: A terrain control device based on a variable airbag array includes: a rubber mold, airbags, and a baffle frame; The airbags are arranged in a rectangular array; the baffle frame is a rectangular grid structure, and the rectangular grid structure of the baffle frame includes multiple receiving slots; the airbags are arranged one-to-one in the receiving slots, and the top of the receiving slots is open; the rubber mold is arranged on the top of the multiple airbags; the multiple airbags are used to generate vertical elastic deformation respectively, so that the rubber mold is uneven, so as to realize the function of simulating terrain.

[0006] Furthermore, an air exchange port is provided at the bottom of the airbag, and the air exchange port is connected to the air pump through an air exchange pipe. Each airbag is individually equipped with an air exchange pipe, and an air valve is provided on the air exchange pipe. The end of the air exchange pipe is fixedly connected to the bottom of the baffle frame.

[0007] A terrain control method based on a variable airbag array includes the following steps: Step 1: Collect and organize all topographic data to be processed from the ancient geomorphological map, standardize its format, and check the integrity of the data and the consistency of the coordinates; Step 2: Select the target area to be simulated in the paleogeographic map; Step 3: Draw the boundary lines of the target region, output the coordinate values ​​of the boundary of the range, and the area size of the region to be simulated; Step 4: Divide the target area into grids, with the number of grids being the same as the number of airbags; Step 5: Number the divided areas and simultaneously number the airbags, with each area number corresponding to one airbag number to form a lookup table; Step 6: Load all terrain data into the software and perform a preliminary verification check on the data; Step 7: Read the data for each divided region, including terrain relief, slope, aspect, and terrain height; Step 8: After reading the data of each divided area, fill it into the reference table, import the reference table, calculate the required air intake of the airbag, and fill the corresponding airbag with gas so that the airbag reaches the specified elevation. Step 9: Monitor the inflation value of each airbag and monitor the data in real time to ensure that the air intake volume matches the set value; Step 10: After all airbags have been inflated, cover the airbags with a rubber membrane and scan the simulated terrain of the airbags to generate the corresponding terrain. Step 11: Compare the airbag array topographic map with the original paleogeographic map, perform difference analysis and verification; Step 12: If the terrain needs to be changed midway, repeat steps 7 to 11.

[0008] The present invention has the following beneficial effects: (1) The simulated terrain is more accurate. The broken lines are smoothed, making the simulated terrain closer to the actual shape. In subsequent experiments, the experimental results are closer to natural changes. (2) The experimental cost is lower, and there is no need for secondary sand laying for shaping; (3) The airbag is inflated and deflated to reach different heights to simulate geological models with different needs; (4) The landform can be changed during the experiment. If there is a need for landform change in the experimental engineering, the air pump parameters can be changed so that the airbag can be deformed slowly. The range and magnitude of the airbag change are wide and the change is controllable, which can meet the special experimental conditions when the landform changes. (5) The maintenance is simple. All components of the device are modular. When a single airbag is damaged, the airbag can be replaced directly. The replacement is simple and the maintenance time is short. A single module can be replaced directly when it is damaged. Attached Figure Description

[0009] Figure 1 This is an overall flowchart of the method of the present invention; Figure 2 This is a simplified structural diagram of the device of the present invention; Figure 3 This is an ancient geomorphological map of a certain region; Figure 4 This is a paleogeographic map of a certain region (with the research area outlined). Figure 5 A schematic diagram of the actual terrain of a certain area --- the terrain to be simulated; Figure 6 A schematic diagram of the actual terrain of a certain area --- a contour map of the terrain to be simulated; Figure 7 A gridded map showing the actual terrain of the area—the contour lines of the terrain to be simulated. Figure 8 A table showing the correspondence between grid numbers and airbag numbers; Figure 9 A schematic diagram of the actual terrain of the region---numerical map of each grid area of ​​the terrain to be simulated. Detailed Implementation

[0010] The following will be described in conjunction with embodiments of the present invention. Figures 1-9 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0011] like Figure 2 The present invention proposes a terrain control device based on a variable airbag array, comprising: a rubber mold, airbags and a baffle frame; The airbags are arranged in a rectangular array; the baffle frame is a rectangular grid structure, and the rectangular grid structure of the baffle frame includes multiple receiving slots; the airbags are arranged one-to-one in the receiving slots, and the top of the receiving slots is open; the rubber mold is arranged on the top of the multiple airbags; the multiple airbags are used to generate vertical elastic deformation respectively, so that the rubber mold is uneven, so as to realize the function of simulating terrain.

[0012] The airbag is provided with an air exchange port at the bottom, and the air exchange port is connected to the air pump through an air exchange pipe. Each airbag is individually equipped with an air exchange pipe, and an air valve is provided on the air exchange pipe. The end of the air exchange pipe is fixedly connected to the bottom of the baffle frame.

[0013] The main function of the baffle frame in this invention is to fix the position of each airbag, constrain the airbag to only produce vertical deformation, and ensure that the function of each airbag is isolated and does not affect each other.

[0014] A gas flow detection sensor can be installed at the air exchange port to detect and record the gas flow rate of the air pump in real time. The data is uploaded to the air pump control system every 3 seconds. The air pump control system compares the uploaded value with the calculated value and controls the working status of the air pump based on the comparison result. If the uploaded value is greater than the calculated value, the air pump stops working; otherwise, the air pump continues to work.

[0015] The rubber membrane provides a continuous terrain condition. After the terrain simulation is completed, the four corners of the rubber membrane are connected and fixed to the boundary of the baffle frame with ropes to secure the rubber membrane.

[0016] like Figure 1 The present invention also proposes a terrain control method based on a variable airbag array, comprising: Step 1: If the analysis results indicate that the invented device can perform terrain simulation, collect and organize all terrain data to be processed from the paleogeographic map, standardize its format, and check the data integrity and coordinate consistency. See the paleogeographic diagram below. Figure 3 .

[0017] Step 2: Select the desired simulation area on the paleogeographic map, see... Figure 4 Paleogeographic map of a certain region (with the research area outlined).

[0018] Step 3: As required, draw the boundary lines of the target area, the coordinate values ​​of the output range boundary, and the area size of the region to be simulated in software such as SUFFER. Figure 5 A schematic diagram of the actual terrain of a certain area --- the terrain to be simulated. Figure 6 A schematic diagram of the actual terrain of a certain area --- a contour map of the terrain to be simulated.

[0019] Step 4: Divide the target area into a grid, ensuring the number of grid areas matches the actual number of airbags needed. For example... Figure 7 A schematic diagram of the actual terrain of the area---a grid map of the contour lines of the terrain to be simulated; Step 5: Number the divided areas and simultaneously number the airbag array. The area numbers correspond one-to-one with the airbag numbers, forming a lookup table. For example, area number A1 corresponds to airbag number A1. Figure 8 Grid number and airbag number correspondence table.

[0020] Step 6: In professional software such as ArcGIS, import the terrain to be simulated, load all terrain data into the software, and perform preliminary verification and checks to ensure the data is correct. Figure 9 Schematic diagram of actual terrain in the region --- numerical map of each grid area of ​​the terrain to be simulated.

[0021] Step 7: Read the data from the divided regions, and perform terrain relief, slope, aspect, and elevation analysis on each region to identify areas with complex terrain. Each point has three-dimensional data: location (X, Y) and elevation (Z). For example... Figure 9 Schematic diagram of actual terrain in the region --- numerical map of each grid area of ​​the terrain to be simulated.

[0022] Step 8: After reading the data from each area, fill it into the comparison table, import it into the comparison table, and based on the similarity principle, the software will perform corresponding calculations to determine the required air intake for the airbag. According to the designed pressure value and air intake, connect the inflation device to inflate the corresponding airbag, bringing it to the specified elevation. For example... Figure 8 Grid number and airbag number correspondence table.

[0023] The basic calculation principle of this invention is the similarity principle: The ratio between the prototype value and the corresponding value in the model is called the model ratio. Let... The length of a certain part of the prototype. Given the length of the corresponding part of the model, the length scale is: In the formula, H represents the prototype and m represents the model. The length is proportional to the ruler. It is identical in any corresponding part of the prototype and model, therefore it can represent both length scales and width and height scales.

[0024] With length ratio ruler From this, we can derive the area scale and volume scale. Since area is the square of length, the area scale is: Similarly, since volume is the cube of length, the volume scale is: Length scales characterize geometric similarity; that is, geometric similarity is represented by length scales. It is used to express this.

[0025] Idealizing the airbag shape as a cylinder, let the required height be h, the radius of the airbag's base be r, and the air intake volume = airbag volume = V. H For known values Step 9: Monitor the inflation value of each airbag and monitor the data in real time to ensure that the air intake matches the set value.

[0026] Step 10: After all the airbags have been inflated, cover the airbag array with a rubber film and scan the simulated terrain of the airbag array to generate the corresponding terrain.

[0027] Step 11: Compare the airbag array topographic map with the imported original base map, perform difference analysis, and verify that the airbag array simulated terrain can meet the actual needs.

[0028] Step 12: If the terrain needs to be changed midway, repeat steps 7 to 11.

[0029] This invention imports the required simulated terrain file into professional software for identification. This software can match the terrain file with the sedimentation simulation system according to a certain scale and divide it into reasonable blocks.

[0030] It should be noted that the airbag in this invention is a modular design, and its radius and the position of its fixing structure can be modified according to different precision requirements to control different levels of precision. When the required precision cannot be achieved, the radius of the airbag in this invention can be reduced or its position adjusted to control and reduce errors and improve precision.

[0031] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A terrain control device based on a variable airbag array, characterized in that, include: Rubber mold, airbag and baffle frame; The airbags are arranged in a rectangular array; the baffle frame is a rectangular grid structure, and the rectangular grid structure of the baffle frame includes multiple receiving slots; the airbags are arranged one-to-one in the receiving slots, and the top of the receiving slots is open; The rubber mold is arranged on top of the multiple airbags; the multiple airbags are used to generate vertical elastic deformation, making the rubber mold uneven, so as to realize the function of simulating terrain.

2. The terrain control device based on a variable airbag array according to claim 1, characterized in that, The airbag is provided with an air exchange port at the bottom, and the air exchange port is connected to the air pump through an air exchange pipe. Each airbag is individually equipped with an air exchange pipe, and an air valve is provided on the air exchange pipe. The end of the air exchange pipe is fixedly connected to the bottom of the baffle frame.

3. A terrain control method based on a variable airbag array, characterized in that, Includes the following steps: Step 1: Collect and organize all topographic data to be processed from the ancient geomorphological map, standardize its format, and check the integrity of the data and the consistency of the coordinates; Step 2: Select the target area to be simulated in the paleogeographic map; Step 3: Draw the boundary lines of the target region, output the coordinate values ​​of the boundary of the range, and the area size of the region to be simulated; Step 4: Divide the target area into grids, with the number of grids being the same as the number of airbags; Step 5: Number the divided areas and simultaneously number the airbags, with each area number corresponding to one airbag number to form a lookup table; Step 6: Load all terrain data into the software and perform a preliminary verification check on the data; Step 7: Read the data for each divided region, including terrain relief, slope, aspect, and terrain height; Step 8: After reading the data of each divided area, fill it into the reference table, import the reference table, calculate the required air intake of the airbag, and fill the corresponding airbag with gas so that the airbag reaches the specified elevation. Step 9: Monitor the inflation value of each airbag and monitor the data in real time to ensure that the air intake volume matches the set value; Step 10: After all airbags have been inflated, cover the airbags with a rubber membrane and scan the simulated terrain of the airbags to generate the corresponding terrain. Step 11: Compare the airbag array topographic map with the original paleogeographic map, perform difference analysis and verification; Step 12: If the terrain needs to be changed midway, repeat steps 7 to 11.

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