A device for measuring the ability of shrubs in desert areas to block or slow down wind and sand

Abstract

The invention discloses a device for measuring the ability of shrubs in desert areas to hinder or mitigate wind and sand, comprising a wind vane, a fixing pile, a control device, a measuring frame and a stepping device; the stepping device is fixedly arranged on the top surface of the measuring frame; the wind vane is arranged on the top of the stepping device; the fixing pile is arranged on the bottom of the measuring frame; the control device is arranged on one side of the measuring frame; the wind speed in the horizontal position measurement grid is used as the data basis for the shrubs to hinder wind and sand; a database is formed on a computer, and the measurement of the wind and sand hindering ability of different types of shrubs in the desert is effectively realized, which has a far-reaching significance for the understanding of the ecological structure of desert areas and the improvement of the ecological environment in the future.

Description

Technical Field

[0001] The invention relates to the technical field of wind speed measurement, and in particular to a device for measuring the blocking or mitigation capability of shrubs in desert areas to wind and sand. Background Art

[0002] The global desertification area accounts for about 1 / 4 of the world's land area, and has affected 1 / 6 of the world's population, more than 100 countries and regions, and 6 million hectares of land are turned into desert every year. According to authoritative data, the global desertification of soil is still expanding at a rate of 50,000 to 70,000 square kilometers per year. Northwest my country is also a region where sandstorms frequently occur due to its unique geographical environment.

[0003] Shrubs play an important role in grassland restoration in arid desert areas because they expand the source of species productivity, increase opportunities for multiple uses, and increase ecological stability. Years of research have also confirmed that shrubs are a vital biological resource in grassland restoration, especially in arid desert areas. There have been many reports on the windbreak and sand fixation functions of shrubs. They can effectively reduce wind speed and sand transport, and have a significant effect on sand fixation and soil improvement, improve the ecological environment of sandy land, and transform mobile sandy land into semi-fixed and fixed sandy land in a short period of time.

[0004] The vegetation in desert areas is resistant to drought and wind erosion. Therefore, the development of dominant vegetation in deserts plays a fundamental role in the ecological restoration of desert areas. In order to achieve the purpose of sand fixation and soil improvement, the most basic characteristic of shrubs is to reduce wind speed, that is, they have better wind and sand blocking or mitigation capabilities. Summary of the invention

[0005] The purpose of the present invention is to provide a device for measuring the ability of shrubs in desert areas to hinder or slow down wind and sand, so as to solve the problems existing in the above-mentioned prior art and to achieve a more accurate measurement of the ability of shrubs in the northwest desert area to slow down the speed of wind and sand.

[0006] To achieve the above-mentioned object, the present invention provides the following scheme: The present invention provides a device for measuring the ability of shrubs in desert areas to hinder or mitigate wind and sand, characterized in that it includes: a weather vane, a fixed pile, a control device, a measuring net frame and a stepping device; the stepping device is fixedly arranged on the top surface of the measuring net frame; the weather vane is arranged on the top of the stepping device; the fixed pile is arranged at the bottom of the measuring net frame; the control device is arranged on one side of the measuring net frame;

[0007] The measuring net frame comprises a plug-in fixing block, a threaded fixing block, a square net frame, a guide slide rod, a movable net frame and a square frame; the square net frame and the square frame are both square structures composed of four beams; eight plug-in fixing blocks are provided, one side of the plug-in fixing block is respectively fixedly installed on the four corners of the same side of the square net frame and the four corners of the same side of the square frame, and the other opposite side of the plug-in fixing block is provided with a plug-in hole adapted to the guide slide rod; four guide slide rods are provided, both ends of which are respectively plugged with the plug-in fixing blocks, and the guide slide rods are parallel to each other;

[0008] The square net frame and the two ends of the top surface of the square frame are respectively fixedly installed with threaded fixing blocks, and the threaded fixing blocks are provided with four and each top surface is provided with a screw mounting hole; the stepping device is screwed with the threaded fixing blocks through the screw mounting holes;

[0009] The movable net frame includes a round crossbeam, a round column and a three-dimensional four-way; the inner diameter of the three-dimensional four-way is adapted to the outer diameter of the round column and the round crossbeam; the two ends of the round crossbeam and the round column are respectively connected to the two middle joints of the three-dimensional four-way to form a square frame; three of the four joints of the three-dimensional four-way are arranged perpendicular to each other, and the remaining one joint is connected to any one of the joints and the axes of the two joints coincide, and the two directly connected joints of the three-dimensional four-way are sleeved on the guide slide rod.

[0010] Preferably, a movable mesh frame is sleeved on the guide slide rod and can move thereon, so that the operator can flexibly adjust it according to the crown diameter of the shrub to be measured and the operator's measurement intention, which is convenient and quick; and the entire measurement mesh frame is a plug-in setting, so that the entire measurement device can be quickly unfolded or folded, which is easy to carry.

[0011] The movable screen frame and the square screen frame both include screens; the square screen frame also includes a square frame; the screens are fixedly installed in the square frame and the square frame respectively.

[0012] Preferably, the square frame and the mobile frame are both fixedly mounted with wire mesh, and the distance between the mobile frame and the square frame can be flexibly adjusted to accommodate desert shrubs. At the same time, the wire mesh can be provided to calibrate the area of ​​the object to be measured according to the grid, which is convenient for the subsequent data analysis.

[0013] The stepping device comprises a fixed frame, a first servo motor, a second servo motor, a fixed seat group, a first lifting rod, a second lifting rod, a threaded rod, a gear rod, a spiral block, a moving plate and a speed meter group; the fixed frame is a square structure composed of two cubic structure cross beams and two cubic structure longitudinal beams, the four corners of the top surface of the fixed frame are provided with screw mounting holes, and the screws screw the fixed frame and the threaded fixing block through the screw mounting holes and the screw mounting holes; the top surface of the spiral block is fixedly installed in the middle of the bottom surface of the moving plate, and the center of one side surface of the spiral block is provided with a threaded through hole; the two ends of the moving plate are in contact with the longitudinal beam; one end of the threaded rod is screwed to the spiral block through the threaded through hole, and the other end of the threaded rod is drivingly connected to the output shaft of the first servo motor; the first servo motor is fixedly installed in the middle of the cross beam of the fixed frame, and the threaded rod is of equal length and parallel to the longitudinal beam;

[0014] The fixed seat group includes a fixed seat and a bearing; through holes are respectively opened at both ends of the movable plate, the first lifting rod and the second lifting rod are round rods with teeth on the side, one end of the first lifting rod and the second lifting rod respectively passes through the through holes and meshes with the gear rod; one end of the gear rod is transmission connected to the output shaft of the second servo motor, and the other end is interference fit with the inner ring of the bearing; the outer ring of the bearing is fixedly installed in the fixed seat; the second servo motor and the fixed seat are respectively fixedly installed on the top surface of the movable plate, and the first servo motor and the second servo motor are both electrically connected to the control device.

[0015] Preferably, the threaded rod and the gear rod are perpendicular to each other, and the threaded rod drives the movable plate to move by driving the spiral block. Both ends of the movable plate contact with the longitudinal beams of the fixed frame, and the contacting parts are polished to facilitate the sliding of the movable plate.

[0016] The movable plate is arranged parallel to the cross beam and has the same length as the cross beam.

[0017] The speedometer group also includes a speedometer, a hot wire probe, a quick-release shaft and a fixed rod; the quick-release shaft is sleeved at the bottom of the second lifting rod, and one end of the fixed rod is plugged into the quick-release shaft; the hot wire probe is provided with two fixedly installed on the first lifting rod and the other end of the fixed rod respectively, and the hot wire probe fixedly installed at the bottom end of the first lifting rod is arranged in the center of the grid in the square mesh frame; the hot wire probe is electrically connected to the speedometer, and the speedometer is fixedly installed on the side of the movable plate.

[0018] Preferably, the two hot wire probes are located on the same horizontal line and are arranged in the center of the grid and at the same horizontal distance from the grid, but this will not hinder the hot wire probes from moving up and down with the first lifting rod and the second lifting rod. This makes it convenient for the hot wire probes to move back and forth and up and down regularly with the servo motor, thereby measuring the wind speed in the grid and recording it by the anemometer.

[0019] The weather vane is fixedly mounted on a corner of the top surface of the fixing frame.

[0020] A plurality of fixing piles are provided, and the fixing piles include pointed piles and quick-release cards; the upper part of the pointed piles is fixedly installed on the square net frame and the bottom of the square frame through the quick-release cards.

[0021] The mesh of the wire mesh is a square with a side length of 5cm-20cm, and has at least 10 full rows and 10 full columns.

[0022] Preferably, setting the specifications and array of the wire mesh can facilitate the later operator to collect data in blocks, and setting grids of different specifications and sizes can adjust the accuracy of the data, providing strong support for later analysis.

[0023] The square screen frame, the guide slide rod, the movable screen frame and the square frame are all made of light metal materials such as aluminum alloy or magnesium alloy.

[0024] The threaded rod is provided with threads matching with the spiral block throughout the threaded rod; and the gear rod is provided with meshing teeth at the meshing position with the first lifting rod and the second lifting rod.

[0025] Preferably, the threaded rod and the gear rod are provided so that the power of the first and second servo motors can be transmitted to the threaded block and the first and second lifting rods, thereby realizing the movement of the threaded block, the first lifting rod and the second lifting rod.

[0026] The present invention discloses the following technical effects:

[0027] The present invention utilizes the precise control capability of the servo motor to programmatically control the detection probe and automatically collect data of the grid to be tested, which greatly reduces the workload of manual operation, improves the consistency of data collection, and lays a good foundation for subsequent data analysis.

[0028] According to the different blocking or mitigation effects of the three-dimensional structure of shrubs on wind and sand in different positions, the present invention produces a device that is easy to install, disassemble and measure, thereby realizing the measurement of the blocking or mitigation capabilities of different shrubs in desert areas on wind and sand, and conducting basic research on the possibility of grassland restoration in desert areas. The present invention is suitable for the Gobi desert area of ​​the Hexi Corridor or other arid and semi-arid areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 It is the front view of the present invention.

[0031] Figure 2 It is a top view of the present invention.

[0032] Figure 3 Three views for measuring the screen frame.

[0033] Figure 4 Wind speed reduction diagram for different parts of shrubs in the embodiment.

[0034] Among them, there are measuring screen frame-1, plug-in fixing block-11, threaded fixing block-12, square screen frame-13, guide slide rod-14, movable screen frame-15, round beam-151, round column-152, screen-153, three-dimensional cross-way-154, square frame-16, stepping device-2, fixed frame-21, first servo motor-22a, second servo motor-22b, fixing seat group-23, fixing seat-231, bearing-232, first lifting rod-24a, second lifting rod-24b, threaded rod-25, gear rod-26, spiral block-27, movable plate-28, speedometer group-29, speedometer-291, hot wire probe-292, quick-release shaft-293, fixing rod-294. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] The present invention provides a device for measuring the ability of shrubs in desert areas to hinder or mitigate wind and sand, which is characterized by comprising: a wind vane, a fixed pile, a control device, a measuring frame 1 and a stepping device 2; the stepping device 2 is fixedly arranged on the top surface of the measuring frame 1; the wind vane is arranged on the top of the stepping device 2; the fixed pile is arranged at the bottom of the measuring frame 1; the control device is arranged on one side of the measuring frame 1;

[0038] The measuring net frame 1 comprises a plug-in fixing block 11, a threaded fixing block 12, a square net frame 13, a guide slide rod 14, a movable net frame 15 and a square frame 16; the square net frame 13 and the square frame 16 are both square structures composed of four beams; there are eight plug-in fixing blocks 11, one side of the plug-in fixing block 11 is respectively fixedly installed on the four corners of the same side of the square net frame 13 and the four corners of the same side of the square frame 16, and the other opposite side of the plug-in fixing block 11 is provided with a plug-in hole adapted to the guide slide rod 14; there are four guide slide rods 14, both ends of which are respectively plugged with the plug-in fixing blocks 11, and the guide slide rods 14 are parallel to each other;

[0039] The two ends of the top surface of the square net frame 13 and the square frame 16 are respectively fixedly mounted with threaded fixing blocks 12, and four threaded fixing blocks 12 are provided and each top surface is provided with a screw mounting hole; the stepping device 2 is screwed to the threaded fixing block 12 through the screw mounting hole;

[0040] The movable net frame 15 includes a round crossbeam 151, a round column 152 and a three-dimensional cross-way 154; the inner diameter of the three-dimensional cross-way 154 is adapted to the outer diameter of the round column 152 and the round crossbeam 151; the two ends of the round crossbeam 151 and the round column 152 are respectively connected to the two middle joints of the three-dimensional cross-way 154 to form a square frame; three of the four joints of the three-dimensional cross-way 154 are arranged perpendicular to each other, and the remaining one joint is connected to any one of the joints and the axes of the two joints coincide, and the two joints directly connected to the three-dimensional cross-way 154 are sleeved on the guide slide rod 14.

[0041] The movable screen frame 15 and the square screen frame 13 both include a screen 153; the square screen frame 13 also includes a square frame; the screen 153 is fixedly installed in the square frame and the square frame respectively.

[0042] The stepping device 2 includes a fixed frame 21, a first servo motor 22a, a second servo motor 22b, a fixed seat group 23, a first lifting rod 24a, a second lifting rod 24b, a threaded rod 25, a gear rod 26, a spiral block 27, a moving plate 28 and a speed meter group 29; the fixed frame 21 is a square structure composed of two cross beams of a cubic structure and two longitudinal beams of a cubic structure, and screw mounting holes are provided at the four corners of the top surface of the fixed frame 21, and the screws screw the fixed frame 21 and the threaded fixing block 12 through the screw mounting holes and the screw mounting holes; the top surface of the spiral block 27 is fixedly installed in the middle of the bottom surface of the moving plate 28, and a threaded through hole is provided in the center of one side of the spiral block 27; the two ends of the moving plate 28 are in contact with the longitudinal beam; one end of the threaded rod 25 is screwed to the spiral block 27 through the threaded through hole, and the other end of the threaded rod 25 is connected to the output shaft of the first servo motor 22a in driving connection; the first servo motor 22a is fixedly installed in the middle of the cross beam of the fixed frame 21, and the threaded rod 25 is equal in length to the longitudinal beam and parallel to each other;

[0043] The fixed seat group 23 includes a fixed seat 231 and a bearing 232; through holes are respectively opened at both ends of the movable plate 28, and the first lifting rod 24a and the second lifting rod 24b are round rods with teeth on the side. One end of the first lifting rod 24a and the second lifting rod 24b respectively passes through the through holes and meshes with the gear rod 26; one end of the gear rod 26 is transmission connected to the output shaft of the second servo motor 22b, and the other end is interference fit with the inner ring of the bearing 232; the outer ring of the bearing 232 is fixedly installed in the fixed seat 231; the second servo motor 22b and the fixed seat 231 are respectively fixedly installed on the top surface of the movable plate 28, and the first servo motor 22a and the second servo motor 22b are both electrically connected to the control device.

[0044] The movable plate 28 is arranged parallel to the cross beam and has the same length as the cross beam.

[0045] The speedometer group 29 also includes a speedometer 291, a hot wire probe 292, a quick-release shaft 293 and a fixed rod 294; the quick-release shaft 293 is sleeved on the bottom of the second lifting rod 24b, and one end of the fixed rod 294 is plugged into the quick-release shaft 293; the hot wire probe 292 is provided with two fixedly installed on the first lifting rod 24a and the other end of the fixed rod 294 respectively, and the hot wire probe 292 fixedly installed at the bottom end of the first lifting rod 24a is arranged in the center of the grid in the square mesh frame 13; the hot wire probe 292 is electrically connected to the speedometer 291, and the speedometer 291 is fixedly installed on the side of the movable plate 28.

[0046] The wind vane is fixedly mounted on a corner of the top surface of the fixing frame 21 .

[0047] A plurality of fixed piles are provided, and the fixed piles include sharp piles and quick-release clips; the upper part of the sharp piles is fixedly mounted on the bottom of the square net frame 13 and the square frame 16 through the quick-release clips.

[0048] The meshes of the screen 153 are squares with a side length of 5 cm to 20 cm, and have at least 10 full rows and 10 full columns.

[0049] The square screen frame 13, the guide slide rod 14, the movable screen frame 15 and the square frame 16 are all made of light metal materials such as aluminum alloy or magnesium alloy.

[0050] The threaded rod 25 is provided with threads matching with the screw block 27 throughout the body; the gear rod 26 is provided with meshing teeth at the meshing position with the first lifting rod 24a and the second lifting rod 24b.

[0051] In one embodiment of the present invention, the operator installs the measuring frame 1, the stepping device 2, the weather vane, and the fixed piles in place, adjusts the distance between the mobile frame 15 and the square frame 13, close to the desert shrubs, the grid specifications of the mobile frame 15 and the square frame 13 are 10cm*10cm, and sets the program to bring the hot wire probe 292 close to the middle position of the wire mesh 153 grid so as not to hinder the hot wire probe 292 from moving up and down with the first lifting rod 24a and the second lifting rod 24b, and the two hot wire probes 292 are in the same relative grid, turn on the control device located on one side of the measuring frame 1, control the moving plate 28, the first lifting rod 24a and the second lifting rod 24b to collect wind speed data at the hot wire probe according to a step distance of 10cm, extract the data from the speed meter 291, and use Origin to draw the graph.

[0052] The present invention discloses the following technical effects:

[0053] The present invention utilizes the precise control capability of the servo motor to programmatically control the detection probe and automatically collect data of the grid to be tested, which greatly reduces the workload of manual operation, improves the consistency of data collection, and lays a good foundation for subsequent data analysis.

[0054] According to the different blocking or mitigation effects of the three-dimensional structure of shrubs on wind and sand in different positions, the present invention produces a device that is easy to install, disassemble and measure, thereby realizing the measurement of the blocking or mitigation capabilities of different shrubs in desert areas on wind and sand, and conducting basic research on the possibility of grassland restoration in desert areas. The present invention is suitable for the Gobi desert area of ​​the Hexi Corridor or other arid and semi-arid areas.

[0055] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0056] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A device for measuring the ability of shrubs in desert areas to block or mitigate wind and sand, characterized in that: The invention comprises: a weather vane, a fixing pile, a control device, a measuring frame (1) and a stepping device (2); the stepping device (2) is fixedly arranged on the top surface of the measuring frame (1); the weather vane is arranged on the top of the stepping device (2); the fixing pile is arranged on the bottom of the measuring frame (1); and the control device is arranged on one side of the measuring frame (1); The measuring net frame (1) comprises a plug-in fixing block (11), a threaded fixing block (12), a square net frame (13), a guide slide rod (14), a movable net frame (15) and a square frame (16); the square net frame (13) and the square frame (16) are both square structures composed of four beams; eight plug-in fixing blocks (11) are provided, one side of the plug-in fixing block (11) is respectively fixedly installed on the four corners of the same side of the square net frame (13) and the four corners of the same side of the square frame (16), and the other opposite side of the plug-in fixing block (11) is provided with a plug-in hole adapted to the guide slide rod (14); four guide slide rods (14) are provided, both ends of which are respectively plugged into the plug-in fixing block (11), and the guide slide rods (14) are parallel to each other; The two ends of the top surfaces of the square mesh frame (13) and the square frame (16) are respectively fixedly mounted with threaded fixing blocks (12), and the threaded fixing blocks (12) are provided with four and each of which has a screw mounting hole on its top surface; the stepping device (2) is screwed to the threaded fixing blocks (12) through the screw mounting holes; The movable net frame (15) comprises a round crossbeam (151), a round column (152) and a three-dimensional cross-piece (154); the inner diameter of the three-dimensional cross-piece (154) is adapted to the outer diameters of the round column (152) and the round crossbeam (151); the two ends of the round crossbeam (151) and the round column (152) are respectively connected to two joints in the middle of the three-dimensional cross-piece (154) to form a square frame; three of the four joints of the three-dimensional cross-piece (154) are arranged perpendicular to each other, and the remaining one joint is connected to any one of the joints and the axes of the two joints coincide, and the two joints directly connected to the three-dimensional cross-piece (154) are sleeved on the guide slide rod (14); The stepping device (2) comprises a fixed frame (21), a first servo motor (22a), a second servo motor (22b), a fixed seat group (23), a first lifting rod (24a), a second lifting rod (24b), a threaded rod (25), a gear rod (26), a screw block (27), a moving plate (28) and a speed meter group (29); the fixed frame (21) is a square structure composed of two cubic structure cross beams and two cubic structure longitudinal beams, and screw mounting holes are provided at four corners of the top surface of the fixed frame (21), and screws are used to connect the fixed frame (21) and the screw mounting holes. The threaded fixing block (12) is screwed; the top surface of the screw block (27) is fixedly installed in the middle of the bottom surface of the movable plate (28), and a threaded through hole is opened in the center of one side surface of the screw block (27); both ends of the movable plate (28) are in contact with the longitudinal beam; one end of the threaded rod (25) is screwed to the screw block (27) through the threaded through hole, and the other end of the threaded rod (25) is connected to the output shaft of the first servo motor (22a) in a driving manner; the first servo motor (22a) is fixedly installed in the middle of the crossbeam of the fixed frame (21), and the threaded rod (25) is of equal length to the longitudinal beam and parallel to each other; The fixed seat group (23) comprises a fixed seat (231) and a bearing (232); through holes are respectively provided at both ends of the movable plate (28); the first lifting rod (24a) and the second lifting rod (24b) are round rods with teeth on the side; one end of the first lifting rod (24a) and the second lifting rod (24b) respectively pass through the through holes and mesh with the gear rod (26); one end of the gear rod (26) is transmission-connected to the output shaft of the second servo motor (22b), and the other end is interference-fitted with the inner ring of the bearing (232); the outer ring of the bearing (232) is fixedly installed in the fixed seat (231); the second servo motor (22b) and the fixed seat (231) are respectively fixedly installed on the top surface of the movable plate (28); the first servo motor (22a) and the second servo motor (22b) are both electrically connected to the control device; The speed meter group (29) also includes a speed meter (291), a hot wire probe (292), a quick-release shaft (293) and a fixed rod (294); the quick-release shaft (293) is sleeved on the bottom of the second lifting rod (24b), and one end of the fixed rod (294) is plugged into the quick-release shaft (293); the hot wire probe (292) is provided with two ends respectively fixedly mounted on the first lifting rod (24a) and the other end of the fixed rod (294), and the hot wire probe (292) fixedly mounted on the bottom end of the first lifting rod (24a) is arranged at the center of the grid in the square mesh frame (13); the hot wire probe (292) is electrically connected to the speed meter (291), and the speed meter (291) is fixedly mounted on the side of the movable plate (28); A plurality of fixing piles are provided, and the fixing piles include sharp piles and quick-release clips; the upper portion of the sharp piles is fixedly mounted on the square net frame (13) and the bottom of the square frame (16) via the quick-release clips.

2. The device for measuring the ability of shrubs in desert areas to block or mitigate wind and sand according to claim 1, characterized in that: The movable screen frame (15) and the square screen frame (13) both comprise a screen (153); the square screen frame (13) further comprises a square frame; the screen (153) is fixedly installed in the square frame and the square frame respectively.

3. The device for measuring the ability of shrubs in desert areas to block or mitigate wind and sand according to claim 1, characterized in that: The movable plate (28) is arranged parallel to the cross beam and has the same length as the cross beam.

4. The device for measuring the ability of shrubs in desert areas to block or mitigate wind and sand according to claim 1, characterized in that: The weather vane is fixedly mounted on a corner of the top surface of the fixing frame (21).

5. The device for measuring the ability of shrubs in desert areas to block or mitigate sandstorms according to claim 2, characterized in that: The mesh holes of the wire mesh (153) are squares with a side length of 5 cm to 20 cm, and have at least 10 full rows and 10 full columns.

6. The device for measuring the ability of shrubs in desert areas to block or mitigate wind and sand according to claim 1, characterized in that: The square screen frame (13), the guide slide rod (14), the movable screen frame (15) and the square frame (16) are all made of light metal materials such as aluminum alloy or magnesium alloy.

7. The device for measuring the ability of shrubs in desert areas to block or mitigate wind and sand according to claim 1, characterized in that: The threaded rod (25) is provided with threads throughout the body that match the spiral block (27); the gear rod (26) is provided with meshing teeth at the meshing position with the first lifting rod (24a) and the second lifting rod (24b).

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