A small and medium-sized root and soil vector detection device for soil and water conservation

Abstract

The present invention discloses a small-scale root-soil vector detection device for soil and water conservation, which belongs to the field of soil and water conservation detection technology. The device comprises: an upper cover and a lower cover arranged above and below, the upper cover and the lower cover being hingedly connected; a driving assembly for driving the non-hinge end of the upper cover to move closer to the lower cover to form a closed space or away from the lower cover; a box body, the box body being located at the lower end of the lower cover and fixedly connected to the lower cover; a loading platform being located between the lower cover and the box body and rotatably connected to the upper end of the box body through a rotating structural member; a propulsion assembly for changing the relative angle between the loading platform and the box body; a shower simulator, mounted on the lower cover; a collecting device, comprising a runoff collector and a runoff collecting container, both of which are fixedly mounted on the outside of the box body. The present invention simulates the degree of soil and water loss in any region by using different levels of rainfall, so as to better compare the effects of preventing and controlling soil and water loss under the canopies, root systems and different soil types of different plants.

Description

Technical Field

[0001] The invention belongs to the technical field of soil and water conservation detection, and in particular relates to a small-scale soil and water conservation root-soil vector detection device. Background Art

[0002] The detection of soil erosion vectors in existing soil and water conservation is usually done through large-scale field experiments, while the laboratory stage usually uses:

[0003] 1. Dye timing measurement method, which uses dye to simulate rainfall at a specific angle and estimates the time it takes for the dye to move from top to bottom to measure the field runoff, infiltration and sediment volume.

[0004] 2. Mathematical model estimation method, that is, constructing a multi-factor mathematical model and using a computer to adjust fixed parameters based on local actual conditions to estimate the effect of soil and water loss prevention and control.

[0005] Both of the above methods have different defects. The current field trials will affect the soil environment itself to some extent. The detection effect of biological control of soil erosion will produce large errors due to human factors, natural factors and biological factors. In addition, field trials are costly and occupy a large area. The experimental results cannot reflect the preventive and control effect of plant roots on soil erosion.

[0006] However, a fixed slope angle is often used in the laboratory stage. Even after the error is corrected by the maximum water holding capacity in the field, the friction coefficient of soil particles and the mathematical model, the detection method is still unable to quantitatively evaluate the effect of soil and water loss prevention and control. In addition, the current experimental environment lacks unified prescribed parameters for simulation, and the degree of human error is large.

[0007] In addition, different plant roots have different effects on preventing and controlling soil erosion. Taking mine restoration as an example, simply planting one type of plant is not in line with the principle of biological species diversity. After planting a variety of plants, the cohesive effect between plant roots and surface soil may be reduced. The specific extent to which the plant canopy reduces the effect of soil erosion during rainfall has not been explored. Summary of the Invention

[0008] In order to solve the above problems, the present invention adopts the following technical solutions:

[0009] A small and medium-sized root-soil vector detection device for soil and water conservation, comprising:

[0010] An upper cover and a lower cover are arranged up and down, and the upper cover and the lower cover are hingedly connected; a universal nozzle is arranged on the upper cover;

[0011] a driving assembly, the driving assembly being used to drive the non-hinge end of the upper cover to move toward the lower cover to form a closed space or away from the lower cover;

[0012] a box body, the box body being located at the lower end of the lower cover and being fixedly connected to the lower cover;

[0013] A loading platform, located between the lower cover and the box body, and rotatably connected to the upper end of the box body via a rotating structural member; the loading platform is used to place a plant culture container;

[0014] A propulsion assembly, the propulsion assembly being used to change the relative angle between the stage and the box;

[0015] a shower simulator, the shower simulator being mounted on the lower cover and connected to the universal sprinkler head via a first connecting pipe;

[0016] A collecting device, comprising a runoff collector and a runoff collecting container, wherein the runoff collector is on the same side as the rotating structure and is fixedly mounted on the box body; the runoff collector is used to collect rainwater on the loading platform after passing through the plant cultivation container; the runoff collecting container is fixedly mounted on the outside of the box body and is arranged corresponding to the water outlet of the runoff collector; the runoff collecting container is used to collect rainwater collected by the runoff collector.

[0017] Furthermore, the angle of the reciprocating motion of the loading platform with the rotating structure as the axis is 0-60°.

[0018] Furthermore, a limiting platform is provided at the connection between the box body and the lower cover for limiting the lowest point of the loading platform; the lowest point is a horizontal position.

[0019] Furthermore, the loading platform is a rectangular structure, and an opening adapted to the plant cultivation container is provided in the middle of the loading platform; a loading track is provided on the loading platform, and the plant cultivation container is clamped on the loading track.

[0020] Furthermore, the loading platform is provided with guide plates on both sides of the opening, and the guide plates are used to eliminate interference of runoff collected by the runoff collector to other areas.

[0021] Furthermore, a plurality of infiltration collection holes are provided at the bottom of the plant cultivation container, and the infiltration collection holes are drained into the infiltration collection container through the second connecting pipe.

[0022] Furthermore, the plant cultivation container is a two-layer container, which is set as a first layer container and a second layer container respectively. The size of the first layer container is 23.5cm*32cm*4cm, and the size of the second layer container is 24cm*32.5cm*8cm; wherein, the first layer container is a 4-mesh sieve basin, which is used to simulate the infiltration of water in the soil, and the soil thickness in the first layer container is 4cm; a plurality of infiltration collection holes are provided at the bottom of the second layer container, and the infiltration collection holes are drained into the infiltration collection container through the second connecting pipe.

[0023] Furthermore, the shower simulator simulates the rainfall of heavy rain, moderate rain and light rain within one hour by adjusting the pressure;

[0024] The runoff collection container is a cubic container with a bottom area of ​​10*10cm and a height of 55cm;

[0025] A differential pressure sensor is provided on one side of the runoff collecting container. The differential pressure sensor is provided with a pressure inlet channel and a pressure outlet channel. The pressure inlet channel is connected to the bottom of the runoff collector, and the pressure outlet channel of the differential pressure sensor is connected to the runoff collecting container.

[0026] Furthermore, the driving component is a cylinder push rod, the fixed end of the cylinder push rod is hingedly mounted on the lower cover, and the driving end of the cylinder push rod is hingedly connected to the upper cover.

[0027] Furthermore, the propulsion assembly is a mechanical stepping propeller that can bear a weight of 50 kg, and the mechanical stepping propeller is synchronously propelled by two rods and is synchronously propelled by a synchronous co-processor.

[0028] Beneficial effects:

[0029] The present invention provides a small- and medium-sized root-soil vector detection device for soil and water conservation. The detection object is changed from soil to the cohesive effect between the roots of a single or multiple plants and the soil, combined with the effect of the plant canopy in preventing and controlling soil and water loss. The detection data can be used to evaluate the prevention and control effect of the simulation method in any area with a slope of 0-60 degrees based on the effect of the plant culture container. The entire test process uses different levels of rainfall within one hour to simulate the degree of soil and water loss in any area. The experimental results exclude human, natural, and biological factors, and can better compare the prevention and control effects of soil and water loss under different plant canopies, root systems, and different soil types. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the present invention with the upper cover opened;

[0032] Figure 3 Another perspective of the present invention with the upper cover opened;

[0033] Figure 4 This is a schematic diagram of the structure of the present invention (excluding the lower cover and the box body);

[0034] Figure 5 Another perspective of the present invention (excluding the lower cover and the box body);

[0035] Figure 6 This is a front view of the present invention (excluding the lower cover and the box body);

[0036] Figure 7 Schematic diagram of the overall structure of the stage;

[0037] Figure 8 It is the front view of the stage;

[0038] Figure 9 is a top view of the stage;

[0039] Figure 10 It is the left view of the stage;

[0040] Figure 11 This is the rear view of the stage;

[0041] Figure 12 It is a bottom view and a partial cross-sectional enlarged view of the stage;

[0042] Among them, 1. upper cover; 2. lower cover; 3. box; 4. runoff collection container; 5. waste liquid pipe; 6. shower simulator; 7. runoff collector; 8. loading platform; 9. propulsion assembly; 10. rotating structure; 11. differential pressure sensor; 12. drive assembly; 13. waste liquid hole; 14. infiltration collection hole; 15. guide plate; 16. first connecting pipe; 17. universal nozzle; 18. opening; 19. collection port; 20. limit platform. DETAILED DESCRIPTION

[0043] Example 1

[0044] The small and medium-sized root-soil vector detection equipment for soil and water conservation provided in this implementation is used in the laboratory stage to measure the field runoff, infiltration and sediment volume of different plant roots combined with soil on a 0°-60° slope.

[0045] refer to Figure 1-12 , a soil and water conservation small and medium-sized root and soil vector detection equipment, including:

[0046] An upper cover 1 and a lower cover 2 are arranged above and below each other, and the upper cover 1 and the lower cover 2 are hingedly connected; a universal nozzle 17 is provided on the upper cover 1;

[0047] A driving assembly 12, which is used to drive the non-hinged end of the upper cover 1 to move toward the lower cover 2 to form a closed space or away from the lower cover 2;

[0048] The box body 3 is located at the lower end of the lower cover 2 and is fixedly connected to the lower cover 2;

[0049] The loading platform 8 is located between the lower cover 2 and the box body 3 and is rotatably connected to the upper end of the box body 3 through a rotating structure 10; the loading platform 8 is used to place the plant culture container;

[0050] Propelling assembly 9, which is used to change the relative angle between the loading platform 8 and the box 3;

[0051] The shower simulator 6 is mounted on the lower cover 2 and connected to the universal sprinkler 17 via a first connecting pipe 16;

[0052] The collection device includes a runoff collector 7 and a runoff collection container 4. The runoff collector 7 is on the same side as the rotating structure 10 and is fixedly mounted on the box body 3. The runoff collector 7 is used to collect rainwater on the loading platform 8 after passing through the plant culture container. The runoff collection container 4 is fixedly mounted on the outside of the box body 3 and is arranged corresponding to the water outlet of the runoff collector 7. The runoff collection container 4 is used to collect rainwater collected by the runoff collector 7.

[0053] In this embodiment, the angle of the reciprocating motion of the stage 8 with the rotating structure 10 as the axis is 0-60°, preferably 0-45°.

[0054] In this embodiment, a limiting platform 20 is provided at the connection between the box body 3 and the lower cover 2 for limiting the lowest point of the loading platform 8; the lowest point is a horizontal position.

[0055] The small and medium-sized root-soil vector detection equipment for soil and water conservation provided in this embodiment changes the detection object from soil to the cohesive effect of the roots of a single or multiple plants and the soil combined with the effect of the plant canopy in preventing and controlling soil and water loss; the detection data can be used to evaluate the prevention and control effect of this simulation method in any area with a slope of 0-45° based on the effect of the plant culture container.

[0056] Example 2

[0057] In order to better eliminate human factors, natural factors and biological factors, this embodiment is further configured on the basis of embodiment 1.

[0058] In this embodiment, the loading platform 8 is a rectangular structure, and an opening 18 adapted to the plant cultivation container is provided in the middle of the loading platform 8; a loading track is provided on the loading platform 8, and the plant cultivation container is clamped on the loading track.

[0059] In this embodiment, guide plates 15 are provided on both sides of the opening 18 of the loading platform 8 . The guide plates 15 are used to eliminate interference from the runoff collected by the runoff collector 7 to other areas.

[0060] The box body 3 is provided with a collecting port 19 , and the runoff collector 7 is installed in the collecting port 19 .

[0061] In this embodiment, a plurality of seepage collection holes 14 are provided at the bottom of the plant cultivation container, and the seepage collection holes 14 are drained into the seepage collection container through the second connecting pipe.

[0062] In this embodiment, the plant culture container is a two-layer container, configured as a first layer container and a second layer container, arranged one above the other. The first layer container measures 23.5cm*32cm*4cm, and the second layer container measures 24cm*32.5cm*8cm. The first layer container is a 4-mesh sieve basin used to simulate water infiltration in the soil. The soil thickness within the first layer container is 4cm. The bottom of the second layer container is provided with multiple infiltration collection holes 14, which are drained into the infiltration collection container via a second connecting pipe. In other embodiments, the infiltration collection holes 14 can also be drained to the runoff collection container 4 via the second connecting pipe.

[0063] In this embodiment, the shower simulator simulates the rainfall of heavy rain, moderate rain and light rain within one hour by adjusting the pressure.

[0064] The runoff collection container 4 is a cubic container with a bottom area of ​​10*10 cm and a height of 55 cm, and is waterproofed as a whole.

[0065] A differential pressure sensor 11 is installed on one side of the runoff collection container 4. The differential pressure sensor 11 has an inlet and outlet pressure channels. The inlet pressure channel is connected to the bottom of the runoff collector 7, while the outlet pressure channel of the differential pressure sensor is connected to the runoff collection container 4. The differential pressure sensor 11 measures the liquid pressure based on the pressure difference and outputs an S485 signal format. This signal is converted from S485 to S232 via a signal converter, and finally to a USB signal output. The data processing software is a standard port tool.

[0066] In this embodiment, the driving assembly 12 is a cylinder push rod, the fixed end of which is hingedly mounted on the lower cover 2, and the driving end of which is hingedly connected to the upper cover 1. The selection of the cylinder push rod can reduce the user's force when opening the upper cover due to the damping effect.

[0067] In this embodiment, the upper cover 1 and the lower cover 2 are connected by a small 3-inch 0.2 cm thick hinge, and the drive assembly 12 is composed of two 10 kg cylinder push rods; a mounting hole for the universal nozzle 17 is reserved on the top of the upper cover.

[0068] In this embodiment, the propulsion assembly 9 is a mechanical stepping propeller that can bear a weight of 50 kg. The mechanical stepping propeller is a dual-rod synchronous propulsion and is synchronously propelled by a synchronous co-processor.

[0069] Among them, the loading platform is provided with a loading track, two rotating seats (the rotating seats are preset with installation holes for the rotating structure 10, and the two rotating seats are located on both sides of the loading platform) and reserved holes for mechanical stepper propellers; the rotating seat cooperates with the rotating structure 10, and through the mechanical stepper propeller, the loading platform can make an angle change of 0°-45° with the rotating mechanism as the center.

[0070] In this embodiment, the runoff collector 7 is a runoff collection tool for rainwater passing through a specific area of ​​the plant on the stage, and finally collects the runoff into the runoff collection container 4; the shower simulator can simulate the rainfall of heavy rain, moderate rain and light rain within one hour by adjusting the pressure, and realize water supply through the first connecting pipe 16 (2 branches), 4-wheel water pump and timing device; and realizes simulated rainfall by spraying water through the universal nozzle 17.

[0071] In this embodiment, the runoff collector 7 is a 3D-printed component with the same width as the plant cultivation container. The platform's guide plate 15 acts as a rainwater collection and restriction structure to collect runoff from the plant cultivation container. The guide plate 15 extends perpendicular to the central axis of the rotating structure 10.

[0072] In this embodiment, the shower simulator is an electric water pump device with two functional modes, including self-priming and water pipe connection. Both modes are controlled by a timer, and the water pipe connection is equipped with a conversion 2-branch pipe joint.

[0073] In this embodiment, the differential pressure sensor is preferably a digital differential pressure sensor PYG331. The digital differential pressure sensor PYG331 is a gas and liquid pressure difference measurement sensor with a pressure range of 0-2 MPa. It is powered by a 9VDC-24VDC branch and is connected to the bottom of the runoff collection container 4 with two branch pipes. The current pressure difference is recorded every 0.05s, and the runoff volume is calculated according to the formula (the specific water density needs to be selected in combination with the appropriate temperature).

[0074] P=ρgh

[0075] V 水 =S 底 h

[0076] During the simulated precipitation process of the small and medium-sized root-soil vector detection equipment for soil and water conservation provided in this embodiment, water is sprayed vertically by the universal nozzle 17 in the plant cultivation container on the 0-45° stage. Part of the water passes through the soil surface that reaches the maximum water holding rate and finally flows from the stage to the runoff collection container. The rainwater in the runoff collector is collected into the runoff collection container 4; part of the water flows from the soil through the plant root tubes and heels into the infiltration collector and finally flows into the infiltration collection container. In other embodiments, it can also be drained to the runoff collection container 4 through the second connecting pipe; the remaining water flows into the waste liquid cylinder through the waterproof structure of the box.

[0077] The circuit connection of the small and medium-sized root-soil vector detection equipment for soil and water conservation provided in this embodiment is an integrated circuit. There are three parallel circuits in the integrated circuit, which are a mechanical stepping propulsion device circuit, a rainfall simulation circuit and a sensor circuit after passing through a transformer. The final output USB signal can directly obtain data on a computer.

[0078] The soil and water conservation small and medium-sized root-soil vector detection equipment provided in this embodiment has an upper cover and a lower cover as a whole connected to the box body 3, and is reinforced with positioning pins and screws and nuts; the stage 8 generates an upward thrust through a mechanical stepper propeller, and reciprocates with the rotating structure 10 as the center of the circle, and the angle is limited to 0-45°.

[0079] The mechanical stepper propeller is fixed to the bottom of the box body 3 by screws and nuts; the front of the box body 3 is provided with a runoff collector 7, a runoff collecting container 4 and a seepage collection hole 14; the runoff collecting container 4 is connected to the differential pressure sensor 11 by screws and nuts, and the high-pressure hole position of the differential pressure sensor 11 is connected to the bottom hole of the seepage collection container 4 through a 2-branch pipe with an M10 pagoda corner head; a waste liquid hole 13 is provided on the rear side of the box body 3 (the side away from the runoff collection container 4), and the waste liquid is the excess rainwater collected by the waterproof structure and is discharged through the waste liquid pipe 5 (M12 rubber hose).

[0080] During the use of the soil and water conservation small and medium-sized root and soil vector detection device provided in this embodiment, after the device is powered on, the upper cover 1 is first opened and pushed to an appropriate position, such as Figure 2 Place the cultivated plants and plant culture container. Use the Wi-Fi remote control module of the mechanical stepper to adjust the angle to the appropriate level. Adjust the nozzle of the shower simulator 6 to a perpendicular position with the stage 8 (using software simulation to eliminate errors). Close the upper cover 1. Connect the output module of the differential pressure sensor 11 to the computer. Open the adapter software and adjust the appropriate port, parameters, data, data bits, conversion module, command transmission module, and data collection module. Monitor the differential pressure sensor data in real time. Finally, activate the timer function of the shower simulator 6 to adjust the water pressure.

[0081] Example 3

[0082] In order to better simulate the degree of soil erosion in any area, this embodiment makes further arrangements based on the second embodiment.

[0083] The loading platform 8 is the first platform for receiving rainfall, and is provided with a rainwater diversion structure such as Figure 7-12 , exclude the turbulent flow caused by the simulated rainwater on the loading platform 8 after passing through the loading platform, and exclude other net flows flowing through the soil surface of the plant culture container; the simulated rainwater can be divided into three parts, the first part is the runoff flowing through the soil surface of the plant culture container, through the front end of the loading platform 8, dripping into the runoff collector 7, and then merged into the net flow collection container 4 by the net flow collector 7; the second part is the simulated rainwater on the soil surface of the plant culture container due to infiltration, causing the rainwater to gradually penetrate the soil surface, pass through the 4-mesh sieve basin (first layer) and collect into the second layer of plant culture container, and finally pass through the rubber hose and collect into the infiltration collection container through the infiltration collection hole 14; other water flows as waste liquid, pass through other parts of the loading platform 8, and are finally collected by the waterproof structure and discharged through the waste liquid hole 13.

[0084] Example 4

[0085] This embodiment is an operation verification method for the small and medium-sized root-soil vector detection equipment for soil and water conservation provided in Example 3.

[0086] In the early stage of equipment operation, the equipment needs to be run empty according to the test angle, the WIFI remote control module of the mechanical stepper propeller is adjusted to the appropriate angle, the nozzles of the shower simulator 6 are turned on and vertical to the stage 8, and after recording the experimental errors three times, the experimental samples are measured, the obtained data is compared with the error, and finally the experimental data is verified using the runoff balance formula between rainfall, infiltration and surface.

[0087] i=Pcosθ-10R / A

[0088] Where i is the infiltration rate (mm / min), P is the rainfall intensity (mm / min), θ is the slope, R is the runoff rate (runoff volume / time), and A is the area, which is a fixed value in this device.

[0089] If the error exceeds 5% when comparing all data, the data point is considered invalid and the valid data points are extracted; if more than 1 / 3 of the data points are considered invalid, the software will output an ERROR. Otherwise, the field runoff volume and runoff rate that are relatively consistent with the actual situation can be obtained.

[0090] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A small and medium-sized root-soil vector detection device for soil and water conservation, characterized in that: include: An upper cover and a lower cover are arranged up and down, and the upper cover and the lower cover are hingedly connected; a universal nozzle is arranged on the upper cover; a driving assembly, the driving assembly being used to drive the non-hinge end of the upper cover to move toward the lower cover to form a closed space or away from the lower cover; a box body, the box body being located at the lower end of the lower cover and being fixedly connected to the lower cover; A loading platform, located between the lower cover and the box body, and rotatably connected to the upper end of the box body via a rotating structural member; the loading platform is used to place a plant culture container; A propulsion assembly, the propulsion assembly being used to change the relative angle between the stage and the box; a shower simulator, the shower simulator being mounted on the lower cover and connected to the universal sprinkler head via a first connecting pipe; A collecting device, comprising a runoff collector and a runoff collecting container, wherein the runoff collector is on the same side as the rotating structure and is fixedly mounted on the box body; the runoff collector is used to collect rainwater on the loading platform after passing through the plant cultivation container; the runoff collecting container is fixedly mounted on the outside of the box body and is arranged corresponding to the water outlet of the runoff collector; the runoff collecting container is used to collect rainwater collected by the runoff collector.

2. The soil and water conservation small and medium-sized root-soil vector detection device according to claim 1 is characterized in that: The angle of the reciprocating motion of the loading platform with the rotating structural member as the axis is 0-60°.

3. The soil and water conservation small and medium-sized root-soil vector detection device according to claim 2 is characterized in that: A limiting platform is provided at the connection between the box body and the lower cover for limiting the lowest point of the loading platform; the lowest point is a horizontal position.

4. The soil and water conservation small and medium-sized root-soil vector detection device according to claim 1 is characterized in that: The loading platform is a rectangular structure, and an opening adapted to the plant cultivation container is provided in the middle of the loading platform; a loading track is provided on the loading platform, and the plant cultivation container is clamped on the loading track.

5. The soil and water conservation small and medium-sized root and soil vector detection equipment according to claim 4 is characterized in that: The loading platform is provided with guide plates on both sides of the opening, and the guide plates are used to eliminate interference of runoff collected by the runoff collector to other areas.

6. The soil and water conservation small and medium-sized root-soil vector detection device according to claim 5 is characterized in that: The bottom of the plant cultivation container is provided with a plurality of infiltration collection holes, and the infiltration collection holes are drained into the infiltration collection container through the second connecting pipe.

7. The soil and water conservation small and medium-sized root-soil vector detection device according to claim 6 is characterized in that: The plant cultivation container is a two-layer container, which is set as a first layer container and a second layer container respectively. The size of the first layer container is 23.5cm*32cm*4cm, and the size of the second layer container is 24cm*32.5cm*8cm; wherein, the first layer container is a 4-mesh sieve basin, which is used to simulate the infiltration of water in the soil, and the soil thickness in the first layer container is 4cm; a plurality of infiltration collection holes are provided at the bottom of the second layer container, and the infiltration collection holes are drained into the infiltration collection container through the second connecting pipe.

8. The soil and water conservation small and medium-sized root-soil vector detection device according to claim 1 is characterized in that: The shower simulator simulates the rainfall of heavy rain, moderate rain and light rain within one hour by adjusting the pressure; The runoff collection container is a cubic container with a bottom area of ​​10*10cm and a height of 55cm; A differential pressure sensor is provided on one side of the runoff collecting container. The differential pressure sensor is provided with a pressure inlet channel and a pressure outlet channel. The pressure inlet channel is connected to the bottom of the runoff collector, and the pressure outlet channel of the differential pressure sensor is connected to the runoff collecting container.

9. The soil and water conservation small and medium-sized root-soil vector detection device according to claim 1 is characterized in that: The driving component is a cylinder push rod, the fixed end of the cylinder push rod is hingedly mounted on the lower cover, and the driving end of the cylinder push rod is hingedly connected to the upper cover.

10. The soil and water conservation small and medium-sized root-soil vector detection device according to claim 1 is characterized in that: The propulsion assembly is a mechanical stepping propeller that can bear a weight of 50 kg. The mechanical stepping propeller is a dual-rod synchronous propulsion and is synchronously propelled by a synchronous co-processor.

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