System and method for evaluating root growth vigor of ancient tree based on virtual reality technology

By designing an ancient tree root growth assessment system based on virtual reality technology, using leaf-binding rods and air control components to clean fallen leaves, and combining adaptive filtering and machine learning algorithms to process data, the problem of fallen leaf cleaning in ancient tree root system assessment was solved, and the data collection quality and assessment efficiency were improved.

CN120850795APending Publication Date: 2025-10-28NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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Patent Information

Application Number
CN202511029486.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-25
Publication Date
2025-10-28

AI Technical Summary

Technical Problem

Existing technologies make it difficult to effectively clear the leaf litter above the roots of ancient trees, resulting in ground-penetrating radar signal attenuation and decreased data acquisition quality, affecting the efficiency and reliability of ancient tree root system assessments.

Method used

Design a system for evaluating the root growth of ancient trees based on virtual reality technology, including a leaf cleaning unit, a root data acquisition and processing unit, a modeling unit, and a virtual reality display unit. The system uses leaf-binding rods and aeration components to clean up fallen leaves, and processes root data through adaptive filtering and machine learning algorithms to form a three-dimensional model and evaluation results.

Benefits of technology

It has achieved efficient cleaning of fallen leaves above the roots of ancient trees, improved the quality of root data collection and the accuracy of assessment, and enhanced the efficiency and reliability of ancient tree root system assessment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of ancient tree protection, and provides a virtual reality technology-based ancient tree root system growth vigor evaluation system and method, and the system comprises a fallen leaf cleaning unit, a root system data collection and processing unit, a modeling unit, and a virtual reality display unit. The fallen leaf cleaning unit comprises a moving device and a base arranged in the moving device in a lifting mode, leaf binding rods used for binding fallen leaves are arranged on the base in an array mode, a plurality of through grooves are formed in the spine ends of the leaf binding rods in the circumferential direction, and elastic membranes are arranged in the through grooves; the moving device advances on the ground surface above the root system of an ancient tree in a pulse mode, the base moves downwards to drive all the leaf binding rods to move downwards integrally so as to puncture fallen leaves, then air is injected into the leaf binding rods through the air control assembly to enable the elastic membranes to expand so as to prevent the fallen leaves from falling off, and when the leaf binding rods move upwards, the bound fallen leaves are driven to move upwards and collected through the collecting assembly. Fallen leaves on the earth surface above the ancient tree root system can be fully and effectively cleaned, and subsequent ancient tree root system data collection quality is guaranteed.
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Description

Technical Field

[0001] This invention relates to the field of ancient tree protection technology, specifically a system and method for assessing the root growth of ancient trees based on virtual reality technology. Background Technology

[0002] Against the backdrop of ecological and environmental protection, the protection of ancient trees occupies an important position. As the foundation for the growth of ancient trees, the root system of ancient trees undertakes key physiological functions such as absorbing water and nutrients and fixing the plant. Its health status directly affects the survival and reproduction of ancient trees. Assessing the growth of the root system of ancient trees is an important part of the protection of ancient trees.

[0003] The current mainstream technology employs a non-invasive ground-penetrating radar (GPR) detection combined with virtual reality (VR) visualization analysis: First, GPR emits electromagnetic waves into the ground, acquiring reflected signals based on the difference in dielectric constant between the root system and the soil. Then, the raw data undergoes filtering and inversion processing. Finally, 3D modeling software is used to render an intuitive 3D model based on the data, which is then displayed through VR equipment for quantitative assessment of root spatial distribution, biomass, and growth trends. Before GPR detection, the leaf litter layer above the ancient tree roots must be cleared (to avoid radar signal attenuation). Interference and multiple reflection artifacts) Generally speaking, the leaf litter layer above the roots of ancient trees is usually thick due to the long time it has been there. In addition, due to rainwater and the decay of some leaves, the leaf litter layer has obvious adhesion. Existing leaf cleaning equipment (such as roller brush and vacuum sweeper) is difficult to effectively clean the leaf litter layer. Furthermore, the surface above the roots of ancient trees is often uneven, making it even more difficult to deal with the leaves in the depressions. The residual leaves continuously interfere with the penetration and reflection of ground penetrating radar signals, which not only reduces the quality of root data collection, but also requires additional manual rework and data correction, ultimately dragging down the overall assessment efficiency and reliability.

[0004] Therefore, this invention proposes a system and method for assessing the root growth of ancient trees based on virtual reality technology to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a system and method for assessing the root growth of ancient trees based on virtual reality technology, in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A system for assessing the root growth of ancient trees based on virtual reality technology includes: The leaf cleaning unit is used to clean the fallen leaves on the ground above the roots of ancient trees. It includes several leaf-binding rods for binding the fallen leaves on the ground above the roots of ancient trees, a gas control component for controlling the gas flow direction in the leaf-binding rods, and a collection component for collecting the bound leaves. The root data acquisition and processing unit is used to collect root data of ancient trees in the cleared area, and process the real-time root data and historical root data to obtain the root growth assessment results. The root data includes root location, root depth and root distribution. A modeling unit is used to receive the root system data and form a root system model; The virtual reality display unit is used to showcase the root system model and root growth assessment results.

[0007] In one alternative: the leaf-clearing unit includes a mobile device and: The base is hollow inside and is mounted on the mobile device in a lifting manner via telescopic components; Several leaf-binding rods are evenly arranged on the base, the air control assembly is located below the base, and the collection assembly is located on the bottom side of the mobile device.

[0008] In one alternative: the leaf-binding rod is hollow inside, the upper end of the leaf-binding rod penetrates the base and is provided with air holes, and the lower end is provided with several through grooves in the circumferential direction, and each through groove is provided with an elastic diaphragm; The air control component injects and extracts air into the leaf-binding rod through air holes to control the expansion and contraction of the elastic diaphragm, thereby achieving the purpose of binding and collecting fallen leaves.

[0009] In one alternative embodiment: the gas control assembly includes: An air control chamber located in the mobile device and below the base; An air guide tube connecting the air control chamber and the inner cavity of the base; Triggering structure for controlling gas changes in the gas control chamber; After the base moves the leaf-binding rod downward to bind the fallen leaf, the base triggers the structure, causing gas in the air control chamber to be injected into the leaf-binding rod through the air guide tube, causing the elastic diaphragm to expand and restrict the leaf from falling. After the base moves the leaf-binding rod upward, the trigger structure loses its triggering, causing gas in the air control chamber to return through the air guide tube to reset the elastic diaphragm.

[0010] In one alternative embodiment, the triggering structure includes: The piston and the column on the piston located in the air control chamber; A guy rope is installed between the column and the base.

[0011] In one alternative embodiment, the collection component includes: A collection box located on the bottom side of the mobile device; The cut-off plate located below the base; A strip frame is provided on both sides of the mobile device. A magnetic slider is slidably mounted in the strip frame and connected to the collection box. A first electromagnet and a second electromagnet are respectively provided at both ends of the strip frame for magnetically attracting the magnetic slider.

[0012] In one alternative: the inner wall of the strip frame is provided with slots on both sides, and the magnetic slider is provided with a number of balls that are rolled and embedded on the corresponding sides of the slots.

[0013] In one alternative: a plurality of vibration motors are provided on the bottom side of the cut-off plate.

[0014] A method for assessing the root growth of ancient trees based on virtual reality technology, utilizing any of the ancient tree root growth assessment systems described in the above-mentioned technical solutions, includes the following steps: S1: Use the leaf cleaning unit to clean the fallen leaves on the ground above the roots of the ancient tree; specifically: move in a pulse-like manner on the ground above the roots of the ancient tree, causing all the leaf-binding rods to move down as a whole to pierce the fallen leaves. For relatively raised parts of the ground, the corresponding leaf-binding rods will move up. Then, air is injected into the leaf-binding rods through the air control component to prevent the fallen leaves from falling. When the leaf-binding rods move up, they also move the captured fallen leaves up and collect them through the collection component. S2: Place the root data acquisition and processing unit close to the cleaned area to collect root data of the ancient tree, and process the real-time root data with historical root data to obtain the root growth assessment results. The root data includes root location, root depth, and root distribution. S3: Receive the root system data and form a root system model, and display the constructed three-dimensional root system model and root growth assessment results through a virtual reality display unit.

[0015] In one alternative approach: step S2 specifically involves: An adaptive filtering method was used to denoise real-time root data and historical root data, and the changes in root depth and distribution density were extracted to obtain historical and real-time datasets. The historical dataset is divided into 80% training set and 20% test set, and then trained based on machine learning algorithm model. The total loss function is optimized to adjust the model parameters. The real-time dataset is input into the adjusted model to obtain the root growth assessment results of the ancient trees.

[0016] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows: The leaf-clearing unit cleans up the fallen leaves above the roots of ancient trees. Specifically, the mobile device moves in a pulse-like motion above the roots, lowering its base to move all the leaf-piercing rods downwards, thus piercing the fallen leaves. For relatively raised areas, the corresponding leaf-piercing rods move upwards. Then, air is injected into the leaf-piercing rods through the air control component, causing the elastic diaphragm to expand and prevent the fallen leaves from falling. As the leaf-piercing rods move upwards, the captured leaves are also moved upwards and collected by the collection component. This method can effectively and thoroughly clean up the fallen leaves above the roots of ancient trees, ensuring the quality of subsequent data collection on the ancient tree roots.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0019] Figure 1 This is a system block diagram according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the leaf-cleaning unit in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the leaf-binding rod in an embodiment of the present invention.

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0023] Figure 5 for Figure 2 Enlarged view of section B in the middle.

[0024] Figure 6 for Figure 2 Enlarged view of point C.

[0025] Figure 7 This is a schematic diagram showing the arrangement of the bar frame, the first electromagnet, the second electromagnet, and the magnetic slider in an embodiment of the present invention.

[0026] Figure reference numerals: 1-Moving device, 2-Leaf-binding rod, 3-Collection assembly, 301-Collection box, 302-Strip frame, 303-Cutting plate, 304-Vibration motor, 305-First electromagnet, 306-Second electromagnet, 307-Magnetic slider, 308-Slot, 309-Ball, 4-Air control assembly, 401-Air hole, 402-Air guide pipe, 403-Air control chamber, 404-Piston, 405-Column, 406-Cable, 5-Base, 6-Telescopic component, 7-Through groove, 8-Elastic diaphragm, 9-Elastic component, 10-Limiting component. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] Please see Figure 1 A system for assessing the root growth of ancient trees based on virtual reality technology, comprising: The leaf removal unit is used to remove fallen leaves from the ground above the roots of ancient trees. The root data acquisition and processing unit is placed in the cleaned area to collect root data of ancient trees, and processes the real-time root data with historical root data to obtain root growth assessment results. The root data includes root location, root depth, and root distribution. A modeling unit is used to receive the root system data and form a root system model; The virtual reality display unit is used to display the root system model and root growth assessment results. For example, it uses a computer system to generate virtual scenes, including but not limited to holographic projection displays and digital sand table displays.

[0029] The evaluation method includes the following steps: (1) Clean up the fallen leaves on the ground above the roots of the ancient trees; (2) Place the root data acquisition and processing unit close to the cleaned area to collect root data of the ancient trees, and process the real-time root data with historical root data to obtain the root growth assessment results. The root data includes root location, root depth, and root distribution; specifically: An adaptive filtering method was used to denoise both real-time and historical root system data, and the changes in root depth and distribution density were extracted to obtain the historical dataset. and real-time datasets Historical datasets The dataset was divided into an 80% training set and a 20% test set. A machine learning model was used to train and validate the model on both the training and test sets. The total loss function was optimized, and the model parameters were adjusted. Then, the real-time dataset was used... The data is input into the adjusted model to obtain the assessment results of the ancient tree root system growth. In this embodiment, the machine learning model can employ a two-branch assessment model, fusing a 3D-CNN spatial feature extractor with an LSTM temporal analyzer.

[0030] (3) Receive the root system data and form a root system model, and then display the established three-dimensional root system model and the root growth assessment results through the virtual reality display unit.

[0031] This embodiment provides a leaf-clearing unit; please refer to [link / reference]. Figures 2-4 The leaf-collecting unit includes a moving device 1 and a lifting base 5 mounted on the moving device 1. Leaf-collecting rods 2 for collecting fallen leaves are arranged in an array on the base 5. Each leaf-collecting rod 2 can be independently raised and lowered to adapt to uneven terrain. The leaf-collecting rod 2 is hollow inside, and several through grooves 7 are provided around the pointed end of the leaf-collecting rod 2. An elastic diaphragm 8 is provided in the through groove 7 (the elastic diaphragm 8 is preferably made of thermoplastic polyurethane material, which has excellent scratch resistance, thereby ensuring the durability of the elastic diaphragm 8). The leaf-collecting unit also includes an air control component 4 for injecting air into the leaf-collecting rod 2 and extracting air from the leaf-collecting rod 2, and a collection component 3 for collecting the collected fallen leaves. The mobile device 1 is equipped with a corresponding control panel (not shown in the figure) to control the operation of the leaf cleaning unit.

[0032] It should be noted that the mobile device 1 can be propelled by human power or driven by a drive structure composed of components such as motors. Furthermore, this application does not continuously propel the device forward for operation, but rather stops for a certain period of time after each certain distance (not exceeding the length or width of the area of ​​the leaf-binding rods 2 arranged in the array) to perform the actions of binding and collecting fallen leaves. In addition, the root system data acquisition and processing unit, the modeling unit, and the virtual reality display unit are all existing technologies and will not be described in detail here.

[0033] The mobile device 1 moves in a pulse-like manner above the root system of the ancient tree. The base 5 moves downward, causing all the leaf-binding rods 2 to move downward as a whole, thereby piercing the fallen leaves (without soil obstruction, the lower end of the leaf-binding rod 2 will move down a certain distance underground to correspond to the depression in the ground). For relatively raised parts of the ground, the corresponding leaf-binding rod 2 will move upward. Then, the air control component 4 injects air into the leaf-binding rod 2, causing the elastic diaphragm 8 to expand to prevent the fallen leaves from falling. When the leaf-binding rod 2 moves upward, it also moves the captured fallen leaves upward, and they are collected by the collection component 3. This can effectively clean up the fallen leaves above the root system of the ancient tree, ensuring the quality of subsequent data collection of the ancient tree root system.

[0034] Furthermore, the mobile device 1 is equipped with several telescopic components 6 for driving the base 5 to rise and fall. The telescopic components 6 are existing technologies such as electric telescopic rods and telescopic cylinders.

[0035] Please see Figure 2 , Figure 3 , Figure 5 and Figure 6 In one embodiment of the present invention, the air control assembly 4 includes an air control chamber 403 disposed in the moving device 1 and located below the base 5. The air control chamber 403 contains a suitable piston 404 (the piston 404 and the air control chamber 403 are in a sealed state). The base 5 is hollow inside. The leaf-binding rod 2 passes through the base 5 in a sealed manner (using O-rings, sealing rings, etc.), and the upper end of the leaf-binding rod 2 is closed. An air hole 401 is provided on the rod section of the leaf-binding rod 2 located inside the base 5. A communication is provided between the air control chamber 403 and the base 5. The air guide tube 402 (the air guide tube 402 is a flexible tube) is provided with a column 405 on the piston component 404. A pull rope 406 (preferably, the pull rope 406 is a steel wire rope to ensure its strength) is provided between the column 405 and the base 5. When the base 5 moves down to a certain stroke, it contacts the column 405 and drives the piston component 404 to move down to inject air into the leaf rod 2, causing the elastic diaphragm 8 to expand. When the base 5 moves up to a certain stroke, it tightens the pull rope 406, which drives the piston component 404 to move up to extract air from the leaf rod 2, causing the elastic diaphragm 8 to contract and reset.

[0036] In this embodiment, the base 5 moves downwards until it drives the leaf-piercing rod 2 to pierce the fallen leaves before contacting the column 405. As the base 5 continues to move downwards (during this process, the lower end of the leaf-piercing rod 2 will continue to penetrate deeper into the soil, or move upwards under the action of soil resistance, similar to encountering a relatively raised part of the ground), the piston 404 is pressed down to inject air into the base 5. Then the gas enters the leaf-piercing rod 2 through the air hole 401, causing the elastic diaphragm 8 to expand. Subsequently, the base 5 moves upwards to reset, causing the captured fallen leaves to rise. When the base 5 moves upward to a certain stroke, the pull rope 406 is tightened (before this, the collection component 3 is already in place). As the base 5 continues to move upward, it pulls the piston 404 upward to draw air from the base 5, that is, to draw air from the leaf-binding rod 2, causing the elastic diaphragm 8 to contract and reset, no longer blocking the fallen leaves caught on the leaf-binding rod 2. It should be noted that the friction between the piston 404 and the air control chamber 403 is sufficient to keep the elastic diaphragm 8 in an expanded state. In addition, the stroke setting of the leaf-binding rod 2 ensures that the air hole 401 is always confined inside the base 5.

[0037] Furthermore, in this embodiment, a limiting member 10 is provided on the section of the leaf-binding rod 2 located above the base 5, and a number of elastic members 9 (elastic members 9 are springs, elastic ropes, etc. in the prior art) are provided between the upper end of the leaf-binding rod 2 and the base 5. The strength of the number of elastic members 9 is sufficient to support the leaf-binding rod 2 to pierce the fallen leaves. For the relatively protruding part of the ground, the corresponding leaf-binding rod 2 will move upward and then reset under the action of the number of elastic members 9.

[0038] Please see Figure 2 and Figure 7 In one embodiment of the present invention, the collection component 3 includes a collection box 301 (with an open upper side) located on the bottom side of the mobile device 1 and a cut-off plate 303 located in the mobile device 1 and below the base 5. The cut-off plate 303 has through holes that are perpendicular to and fit the size of the leaf-binding rod 2. Both sides of the mobile device 1 are provided with strip frames 302. A magnetic slider 307 is movably mounted in the strip frame 302. The magnetic slider 307 is connected to the collection box 301. The two ends of the strip frame 302 are respectively provided with a first electromagnet 305 and a second electromagnet 306 for magnetically attracting the magnetic slider 307.

[0039] In this embodiment, during the downward movement of the leaf-piercing rod 2 to pierce the fallen leaves, the first electromagnet 305 is energized and magnetized (the second electromagnet 306 is de-energized), thereby attracting the magnetic slider 307. This causes the collection box 301 to be misaligned with the bottom of the moving device 1, allowing the leaf-piercing rod 2 to move smoothly downward to pierce the fallen leaves. After piercing the fallen leaves and raising them to a certain height (there is a certain distance between the lower end of the leaf-piercing rod 2 and the cutting plate 303), the first electromagnet 305 is de-energized, and the second electromagnet 306 is energized and magnetized, thereby attracting the magnetic slider 307. This causes the slider 307 to move from the first electromagnet 305 to the point where the first electromagnet 305 is de-energized, thereby moving the collection box 301 to a state that fits with the bottom of the moving device 1. As the base 5 continues to move upward, the fallen leaves pierced by the leaf-piercing rod 2 fall off under the action of the cutting plate 303 and into the collection box 301, completing the leaf collection action.

[0040] Furthermore, in this embodiment, slots 308 are provided on both sides of the inner wall of the strip frame 302. A number of balls 309 are rolled and embedded on the corresponding sides of the magnetic slider 307 and the slots 308. The balls 309 are locked in the corresponding slots 308. The magnetic slider 307 and the strip frame 302 are in rolling contact, thereby reducing the moving resistance of the magnetic slider 307 and thus driving the collection box 301 to move smoothly.

[0041] Furthermore, in this embodiment, a number of vibration motors 304 are also provided on the bottom side of the intercepting plate 303. When there are fallen leaves (especially damp fallen leaves) adhering to the intercepting plate 303, the vibration motors 304 are activated when collecting the fallen leaves to shake off the fallen leaves adhering to the intercepting plate 303, so as to prevent them from adhering and falling to the ground above the roots of the ancient tree, thus affecting the cleaning effect.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A system for assessing the root growth of ancient trees based on virtual reality technology, characterized in that, include: The leaf cleaning unit is used to clean the fallen leaves on the ground above the roots of ancient trees. It includes several leaf-binding rods (2) for binding the fallen leaves on the ground above the roots of ancient trees, a gas control component (4) for controlling the gas flow direction in the leaf-binding rods (2), and a collection component (3) for collecting the bound leaves. The root data acquisition and processing unit is used to collect root data of ancient trees in the cleared area, and process the real-time root data and historical root data to obtain the root growth assessment results. The root data includes root location, root depth and root distribution. A modeling unit is used to receive the root system data and form a root system model; The virtual reality display unit is used to showcase the root system model and root growth assessment results.

2. The ancient tree root growth assessment system based on virtual reality technology according to claim 1, characterized in that, The leaf-clearing unit includes a mobile device (1) and: The base (5) is hollow inside and is mounted on the mobile device (1) by means of telescopic components (6); Several leaf-binding rods (2) are evenly arranged on the base (5), the air control component (4) is located below the base (5), and the collection component (3) is located on the bottom side of the mobile device (1).

3. The ancient tree root growth assessment system based on virtual reality technology according to claim 2, characterized in that, The leaf-binding rod (2) is hollow inside. The upper end of the leaf-binding rod (2) passes through the base (5) and is provided with an air hole (401). The lower end is provided with several through grooves (7) in the circumferential direction. Each through groove (7) is provided with an elastic diaphragm (8). The air control component (4) injects and extracts air into the leaf-binding rod (2) through the air hole (401) to control the expansion and contraction of the elastic diaphragm (8) so as to achieve the purpose of binding and collecting fallen leaves.

4. The ancient tree root growth assessment system based on virtual reality technology according to claim 3, characterized in that, The gas control component (4) includes: An air control chamber (403) is provided in the mobile device (1) and located below the base (5); A gas guide tube (402) connecting the gas control chamber (403) and the inner cavity of the base (5); Triggering structure for controlling gas changes in the gas control chamber (403); After the base (5) moves the leaf-binding rod (2) downward to bind the fallen leaves, the base (5) triggers the triggering structure, causing the gas in the control chamber (403) to be injected into the leaf-binding rod (2) through the air guide tube (402), causing the elastic diaphragm (8) to expand to restrict the falling leaves; after the base (5) moves the leaf-binding rod (2) upward, the triggering structure loses its triggering, causing the gas in the control chamber (403) to return through the air guide tube (402) to reset the elastic diaphragm (8). The ancient tree root growth assessment system based on virtual reality technology according to claim 4, wherein the triggering structure comprises: The piston (404) and the column (405) located in the air control chamber (403); A pull rope (406) is installed between the column (405) and the base (5).

5. The ancient tree root growth assessment system based on virtual reality technology according to claim 2, characterized in that, The collection component includes: Collection box (301) located on the bottom side of the mobile device (1); Cut-off plate (303) located below base (5); A bar frame (302) is provided on both sides of the mobile device (1). A magnetic slider (307) is slidably provided in the bar frame (302). The magnetic slider (307) is connected to the collection box (301). A first electromagnet (305) and a second electromagnet (306) for magnetically attracting the magnetic slider (307) are respectively provided at both ends of the bar frame (301).

6. The ancient tree root growth assessment system based on virtual reality technology according to claim 6, characterized in that, The inner walls of the strip frame (302) are provided with slots (308) on both sides, and the magnetic slider (307) is provided with a number of balls (309) rolling on the corresponding sides of the slots (308).

7. The ancient tree root growth assessment system based on virtual reality technology according to claim 6, characterized in that, The bottom side of the cut-off plate (303) is provided with several vibration motors (304).

8. A method for assessing the root growth of ancient trees based on virtual reality technology, utilizing the ancient tree root growth assessment system as described in any one of claims 1-8, characterized in that, The following steps are involved: S1: Use the leaf cleaning unit to clean the fallen leaves on the ground above the roots of the ancient tree; Specifically: move in a pulse-like manner on the ground above the roots of the ancient tree, causing all the leaf-binding rods (2) to move down as a whole to pierce the fallen leaves. For the relatively raised parts of the ground, the corresponding leaf-binding rods (2) will move up, and then the air control component (4) will inject air into the leaf-binding rods (2) to prevent the fallen leaves from falling. When the leaf-binding rods (2) move up, they will cause the fallen leaves that have been bound to move up, and collect them through the collection component (3). S2: Place the root data acquisition and processing unit close to the cleaned area to collect root data of the ancient tree, and process the real-time root data with historical root data to obtain the root growth assessment results. The root data includes root location, root depth, and root distribution. S3: Receive the root system data and form a root system model, and display the constructed three-dimensional root system model and root growth assessment results through a virtual reality display unit.

9. The method for assessing the root growth of ancient trees based on virtual reality technology according to claim 9, characterized in that, Step S2 is as follows: An adaptive filtering method was used to denoise both real-time and historical root system data, and the changes in root depth and distribution density were extracted to obtain the historical dataset. and real-time datasets ; Historical dataset The dataset is divided into an 80% training set and a 20% test set. The model is then trained based on a machine learning algorithm model, and the total loss function is optimized to adjust the model parameters. Real-time datasets Input the data into the adjusted model to obtain the assessment results of the ancient tree root system growth.