Oat stalk lodging-resistant monitoring equipment and method thereof

Abstract

The invention discloses an oat stalk lodging-resistant monitoring device and a method thereof, and belongs to the technical field of oat stalk lodging-resistant detection. Through the arrangement of a light-emitting assembly and a monitoring probe, when detection needs to be carried out, the light-emitting assembly and the monitoring probe are turned on, and the lodging-resistant detection of the oat stalk is carried out; oat shadows can be projected on the inner wall of the monitoring cavity through a directional light source generated by the light-emitting assembly, changes of the shadows are recorded through the light-emitting assembly, at the moment, the fans are started, the fans on the two sides form airflow in the monitoring cavity by leading in and leading out air to blow oat stalks to be bent, and the monitoring effect is achieved. According to the relationship between the wind speed and wind direction and the lodging-resistant performance of the oat stalks, different numbers of mounting shells with different heights are opened to form different types of airflows in a monitoring chamber, a monitoring probe captures shadow changes after the oat stalks are bent, and the lodging-resistant performance of the oat stalks is tested by utilizing a shadow analysis and artificial airflow test mode. The actual lodging mechanism can be better reflected by monitoring the dynamic change of the stalks in a natural state in a non-contact manner.

Description

Technical Field

[0001] The present invention relates to the technical field of oat stalk lodging resistance detection technology, and in particular to oat stalk lodging resistance monitoring equipment and a method thereof. Background Art

[0002] Oat stalk lodging resistance testing is a program used to guide variety selection and optimize cultivation management. By quantifying the stalk's ability to resist permanent bending or breaking due to external forces such as wind and rain, and then comparing the lodging resistance of different varieties / genotypes, we can ensure crop survival in natural disasters and select high-quality varieties with stronger stalks and better adaptability to mechanized harvesting.

[0003] Existing lodging resistance tests are typically conducted by measuring the mechanical strength of the stem, such as bending strength or elastic modulus, using a tensile or pressure testing machine. However, static tension / compression testing of the stem's ultimate strength using a tensile or pressure testing machine completely destroys the sample after the test, making it impossible to track the fatigue damage process of the same stem and, therefore, cannot be used for subsequent analysis.

[0004] In addition, the ultimate strength test method can only obtain a single parameter, such as the maximum bearing capacity. Natural collapse is usually caused by low-cycle fatigue caused by repeated wind pressure, not a single ultimate load. It cannot simulate the dynamic stress in the real environment, and the test results are inaccurate.

[0005] Moreover, sending oats to the laboratory for testing is out of touch with actual growing conditions, such as temperature, humidity, and the natural growth state of the stems, which can easily lead to inaccurate results. Summary of the Invention

[0006] The purpose of the present invention is to solve the problem that the method of using a tensile machine or a press to test the ultimate strength of the stem through static tension / compression, the sample is completely destroyed after the test, and the fatigue damage process of the same stem cannot be traced, so it cannot be used for subsequent analysis. The ultimate strength test method can only obtain a single parameter, which cannot simulate the dynamic stress in the real environment. Moreover, the test sent to the laboratory is separated from the actual growth conditions, such as temperature, humidity, natural growth state of the stem, etc., which is also likely to lead to inaccurate results. A monitoring device and method for the anti-lodging of oats stems are proposed.

[0007] To achieve the above objectives, the present invention adopts the following technologies: an oat stalk anti-lodging monitoring device and method:

[0008] The monitoring device comprises a monitoring chamber covered on the oats and a plurality of fans installed on both sides of the monitoring chamber. A photovoltaic module for projecting light onto the oats and a monitoring probe for capturing shadows from the oats are installed inside the monitoring chamber.

[0009] The fans on both sides introduce and export air to form airflow in the monitoring chamber to bend the oat stalks, and the monitoring probe captures the shadow changes after the oat stalks are bent;

[0010] The fan is opened and closed by an opening and closing mechanism. The opening and closing mechanism includes an installation shell installed on the fan and an air duct opened in the middle. A fixed plate and a rotatable movable plate are provided on the inner wall of the air duct. The movable plate rotates to cooperate with the fixed plate to control the opening and closing of the air duct. Different heights and different numbers of installation shells are opened to form different types of airflow in the monitoring chamber.

[0011] As a further description of the above-mentioned technology, an oat stem anti-lodging monitoring device and method is provided: installation cavities are opened on both sides of the fan, the installation shell is installed on the inner side of the installation cavity and an installation platform is installed on the outer side of the installation cavity, the installation shell and the installation platform are connected by bolts passing through the installation cavity, and the fan is fixedly installed on the installation platform.

[0012] As a further description of the above-mentioned technology, an oat stalk anti-lodging monitoring device and method thereof: the opening and closing mechanism also includes a connecting frame rotatably embedded in the installation shell and connected to the movable plate, and an adjustment mechanism for controlling rotation is installed on the connecting frame;

[0013] The adjustment mechanism includes a mounting ring mounted on the connecting frame and a driven wheel rotatably arranged on the surface of the mounting ring. A driving wheel engaged with the driven wheel is rotatably mounted on the bottom of the mounting shell. When the driving wheel rotates, the connecting frame is driven to rotate through the mounting ring and the driven wheel.

[0014] As a further description of the above-mentioned technology, an oat stem anti-lodging monitoring device and method thereof: a first annular slot is provided on the connecting frame, and a second annular slot is provided on the mounting ring. When the connecting frame is connected to the mounting ring, the first slot cooperates with the second slot to install the driven wheel clamp.

[0015] As a further description of the above-mentioned technology, an oat stalk anti-lodging monitoring device and method thereof: a rotatable mounting shaft is detachably mounted on the bottom of the connecting frame, one end of the mounting shaft is provided with a rotatable positioning bolt and is connected to the mounting housing via the positioning bolt, and the other end of the mounting shaft extends to the outside of the mounting cavity and is provided with a knob;

[0016] The driving wheel sleeve is arranged on the surface of the mounting shaft.

[0017] As a further description of the above-mentioned technology, an oat stalk anti-lodging monitoring device and method thereof: the mounting housing is further provided with an acceleration mechanism, the acceleration mechanism comprising an annular rotating ring rotatably embedded in the mounting housing and a cover plate fixedly mounted on the mounting housing, and the airflow generated by the fan enters the mounting housing through the cover plate and the rotating ring;

[0018] A guide groove is provided on the surface of the rotating ring and a sliding cavity is fixedly installed on the cover plate. A connecting piece is inserted into the guide groove and the sliding cavity and a gate plate is installed on the connecting piece. When the rotating ring rotates, the connecting piece is pushed by the guide groove to move horizontally along the length direction of the sliding cavity. The connecting piece drives the gate plate to move to adjust the outlet area of the rotating ring. The flow rate of the same volume of air changes when passing through rotating rings with different outlet areas.

[0019] As a further description of the above technology, an oat stem anti-lodging monitoring device and method thereof: the adjacent connecting parts include a guide slider embedded in the guide groove and a positioning slider embedded in the sliding cavity, and guide rails engaged with the positioning slider are provided on both sides of the inner wall of the sliding cavity.

[0020] As a further description of the above-mentioned technology, an oat stalk anti-lodging monitoring device and method thereof is provided: a connecting groove is provided between the plurality of guide grooves, and the guide slider drives the gate plate to move back and forth when moving in the guide groove and the connecting groove;

[0021] The length of the connecting groove is shorter than that of the guide groove. When the rotating ring rotates with the same amplitude, the travel of the guide slider and the positioning slider in the sliding cavity guided by the guide groove is shorter than the travel of the guide slider and the positioning slider in the sliding cavity guided by the connecting groove.

[0022] As a further description of the above-mentioned technology, an oat stalk anti-lodging monitoring device and method thereof:

[0023] The rotation of the movable plate and the movement of the gate plate are both achieved by rotating the driven wheel, and the driven wheel is connected to the mounting ring and the rotating ring through a switching mechanism;

[0024] The driven wheel includes a first gear engaged in the first and second slots, a second gear connected to the first gear, and a first gear ring embedded in the first and second gears. The second gear ring is mounted on the rotating ring, and the teeth on the first and second gear rings are both arranged to be parallel on one side and inclined on the other side.

[0025] The switching mechanism includes a plurality of first hinge shafts provided on the mounting ring and a second hinge shaft provided on the second gear, wherein the first hinge shafts are rotatably provided with a first hook that meshes with the first gear ring, and the second hinge shafts are rotatably provided with a second hook that meshes with the second gear ring;

[0026] The driven wheel drives any one of the mounting ring and the rotating ring to rotate when rotating forward or reversely.

[0027] In addition, the present invention also provides a method for monitoring the anti-lodging of oat stalks, which is applied to the above-mentioned anti-lodging monitoring device for oat stalks. The specific steps of use are as follows:

[0028] S1. Open the monitoring chamber and place it on the pre-selected oats to be tested. Turn on the power so that the photovoltaic module emits a directional light source, casting the shadow of the oats on the inner wall of the monitoring chamber away from the photovoltaic module.

[0029] S2. By rotating the mounting shaft, the movable plate rotates inside the mounting housing, and the fan is connected to the monitoring chamber through the gap between the fixed plate and the movable plate. The fan can inject air into the monitoring chamber, while the fan on the other side can extract air from the monitoring chamber;

[0030] S3. Depending on the test item, fans are turned on in varying numbers and positions to vary the airflow rate and direction. The outlet area of the rotating ring is adjusted by reversing the mounting shaft to adjust the position of the gate. The same volume of air will have varying flow rates when passing through rotating rings with different outlet areas, providing multiple variables for the experiment.

[0031] S4. The oat stalks tilt under the influence of airflow, causing the position and shape of the shadow to change. This change is captured by a monitoring probe to reflect the degree of stalk bending.

[0032] S5. Use image processing to extract shadow changes from the video, track shadow movement and deformation, and evaluate the stem's resistance to lodging by analyzing the shadow's changing rate, amplitude, and frequency. A sudden increase in the shadow area when the stem lodges, or an accelerated movement of the shadow edge, indicates that the stem is about to break.

[0033] In summary, due to the use of the above-mentioned technology, the oat stem anti-lodging monitoring device and method thereof have the following beneficial effects:

[0034] 1. Through the light-emitting components and monitoring probes, when testing is required, the light-emitting components and monitoring probes are turned on. The directional light source generated by the light-emitting components casts the shadows of the oats on the inner wall of the monitoring chamber, and the light-emitting components record the changes in the shadows. At this time, the fans are started. The fans on both sides introduce and export air to form airflow in the monitoring chamber, blowing the oat stalks to bend. The monitoring probes capture the shadow changes after the oat stalks are bent. Using shadow analysis and artificial airflow testing methods, the dynamic changes of the stalks in their natural state are monitored non-contactly, which can better reflect the actual lodging mechanism.

[0035] 2. Through the setting of the opening and closing mechanism, the movable plate rotates to cooperate with the fixed plate to control the opening and closing of the air duct. According to the relationship between wind speed and direction and the anti-lodging performance of the oat stems, different heights and different numbers of installation shells are opened to form different types of airflows in the monitoring chamber. When conducting extreme tests, more fans can be turned on to detect the anti-lodging threshold. By turning on fans at different heights, three different types of airflows can be formed in the monitoring chamber, namely from top to bottom, from bottom to top, and horizontally. The highest and lowest positions of the top-down and bottom-up airflows can be adjusted by turning on and closing the fans at the corresponding positions, thereby testing the changes in oats after being subjected to bending moments in different directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the three-dimensional structure of an oat stalk anti-lodging monitoring device is shown;

[0037] Figure 2 Shown Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0038] Figure 3 shows a schematic diagram of a three-dimensional cross-sectional structure of a monitoring chamber;

[0039] Figure 4 A schematic cross-sectional structure diagram of an oat stalk anti-lodging monitoring device is shown;

[0040] Figure 5 Shows a schematic diagram of the three-dimensional structure of the opening and closing mechanism;

[0041] Figure 6 A schematic cross-sectional view of the opening and closing mechanism is shown;

[0042] Figure 7 Shown Figure 6 Schematic diagram of the enlarged structure at B in the middle;

[0043] Figure 8 Shows a schematic diagram of the three-dimensional split structure of the opening and closing mechanism, the regulating mechanism and the accelerating mechanism;

[0044] Figure 9 A schematic diagram of the three-dimensional structure of the fixed plate, the movable plate and the connecting frame is shown;

[0045] Figure 10 shows a schematic diagram of the three-dimensional structure of the adjustment mechanism;

[0046] Figure 11 A schematic diagram of the three-dimensional structure of the driving wheel and the mounting shaft is shown;

[0047] Figure 12 shows a schematic diagram of the three-dimensional structure of the acceleration mechanism;

[0048] Figure 13A schematic diagram of the three-dimensional structure of the rotating ring and the guide grooves and the connecting grooves opened on the surface of the rotating ring is shown;

[0049] Figure 14 A schematic diagram of the three-dimensional structure of the gate and the sliding cavity is shown;

[0050] Figure 15 A schematic diagram of the three-dimensional split structure of the driven wheel is shown;

[0051] Figure 16 Shown Figure 15 Schematic diagram of the enlarged structure at C in the middle;

[0052] Figure 17 shows a schematic diagram of the three-dimensional structure of the mounting ring;

[0053] Figure 18 Shown Figure 17 Schematic diagram of the enlarged structure at D in the middle;

[0054] Figure 19 A schematic diagram of the three-dimensional structure of the rotating ring and the second gear ring mounted on its surface is shown.

[0055] Legend:

[0056] 10. Monitoring device body; 11. Monitoring chamber; 111. Push-pull plate; 112. Handle; 113. Mounting cavity; 12. Power supply; 13. Fan; 14. Light-emitting component; 15. Monitoring probe;

[0057] 20. Opening and closing mechanism; 21. Mounting housing; 22. Mounting platform; 23. Fixed plate; 24. Movable plate; 25. Connecting frame; 251. First slot;

[0058] 30. Adjustment mechanism; 31. Mounting ring; 311. Second slot; 32. Driven pulley; 321. First gear; 322. Second gear; 323. First gear ring; 33. Driving pulley; 34. Mounting shaft; 341. Positioning bolt; 342. Turning knob;

[0059] 40. Acceleration mechanism; 41. Rotating ring; 42. Guide groove; 421. Connecting groove; 43. Connecting piece; 431. Guide slider; 432. Positioning slider; 44. Gate; 45. Cover plate; 46. Sliding cavity; 461. Guide rail;

[0060] 50. Switching mechanism; 51. First hinge shaft; 52. First hook; 53. Second hinge shaft; 54. Second hook; 55. Second gear ring. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention, an oat stem anti-lodging monitoring device and method. 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 making creative work are within the scope of protection of the present invention.

[0062] In order to solve the problem that the method of using a tensile machine or a press to test the ultimate strength of the stem through static tension / compression, the sample is completely destroyed after the test, and the fatigue damage process of the same stem cannot be tracked, so it cannot be used for subsequent analysis. The ultimate strength test method can only obtain a single parameter and cannot simulate the dynamic stress in the real environment. Moreover, the test sent to the laboratory is out of the actual growth conditions, such as temperature, humidity, natural growth state of the stem, etc., which is also likely to lead to inaccurate results. The present invention proposes an oat stem anti-lodging monitoring device and method, such as Figure 1 - Figure 19 As shown:

[0063] The monitoring device body 10 includes a monitoring chamber 11 covered on the oats and a plurality of fans 13 installed on both sides of the monitoring chamber 11. The monitoring chamber 11 is internally installed with a light emitting component 14 for projecting light onto the oats and a monitoring probe 15 for photographing the shadows of the oats. Figure 3 As shown, a sliding plate 111 is provided at the bottom of the monitoring chamber 11, and a handle 112 for easy carrying is installed on the top. The staff can hold the handle 112 and carry the equipment into the test field for operation;

[0064] The monitoring device body 10 further includes a power supply 12 mounted on the monitoring chamber 11 for supplying power to the fan 13, the light emitting assembly 14, and the monitoring probe 15. The power supply 12 is connected to the fan 13, the light emitting assembly 14, and the monitoring probe 15 via wires.

[0065] Mounting cavities 113 are defined on both sides of the fan 13. A mounting housing 21 is mounted inside the mounting cavity 113, and a mounting platform 22 is mounted outside the mounting cavity 113. The mounting housing 21 and the mounting platform 22 are connected by bolts passing through the mounting cavity 113, and the fan 13 is fixedly mounted on the mounting platform 22.

[0066] When testing is required, the push-pull plates 111 are opened, so that the monitoring chamber 11 is placed on the selected oats to be tested through the gap between the push-pull plates 111, and the oats enter the monitoring chamber 11. At this time, the light-emitting component 14 and the monitoring probe 15 are turned on. The directional light source generated by the light-emitting component 14 enables the shadow of the oats to be projected on the inner wall of the monitoring chamber 11, and the changes in the shadow are recorded by the light-emitting component 14. At this time, the fan 13 is started, and the fans 13 on both sides form an airflow in the monitoring chamber 11 by introducing and exporting air to blow the oat stems to bend. The monitoring probe 15 captures the shadow changes after the oat stems are bent. Compared with the traditional testing method, the testing method using shadow analysis and artificial airflow monitors the dynamic changes of the stems in a natural state in a non-contact manner, which can better reflect the actual lodging mechanism and can be deployed in the field, avoiding the test errors caused by the oats being out of actual growth conditions;

[0067] like Figure 5 As shown, the fan 13 is opened and closed by an opening and closing mechanism 20. The opening and closing mechanism 20 includes a mounting housing 21 mounted on the fan 13 and having an air duct opened in the middle. A fixed plate 23 and a rotatable movable plate 24 are provided on the inner wall of the air duct. The movable plate 24 rotates in conjunction with the fixed plate 23 to control the opening and closing of the air duct. Depending on the relationship between wind speed and direction and the lodging resistance of oat stalks, the mounting housings 21 of different heights and numbers are opened to form different types of airflow in the monitoring chamber 11.

[0068] The relationship between wind speed and the resistance of oat stalks to lodging. Wind speed is a key factor in determining the magnitude of the wind's impact on oat stalks. High wind speeds will cause oat stalks to be subjected to greater bending moments. Therefore, in the recordings of monitoring probe 15, the shadow edges of oat stalks under the influence of high wind speeds should produce more obvious shaking until they fall.

[0069] The wind speed can be controlled by adjusting the number of fans 13 turned on. The coordinated operation of the fans 13 will form a higher-speed airflow in the monitoring chamber 11, thereby achieving the purpose of increasing the wind speed. It should be noted that the oat stalks will gradually develop a certain adaptability under the long-term wind force, and the shaking rate of their shadow edges will gradually decrease. When performing limit testing, more fans 13 can be turned on to detect their anti-lodging threshold;

[0070] The relationship between wind direction and the lodging resistance of oat stalks. Wind direction determines the direction of wind action on oat stalks. Different wind directions may cause oat stalks to bend in different directions, thus affecting their lodging resistance. For example, in areas with strong winds, if the wind direction is perpendicular to the growth direction of the oat stalks, the stalks are more susceptible to wind impact and lodging.

[0071] By turning on the fans 13 at different heights, three different types of airflows, from top to bottom, from bottom to top, and horizontally, can be formed in the monitoring chamber 11. The highest and lowest positions of the top-down and bottom-up airflows can be adjusted by turning on and off the fans 13 at the corresponding positions, thereby testing the changes in oats after being subjected to bending moments in different directions.

[0072] like Figure 9 As shown, the opening and closing mechanism 20 also includes a connecting frame 25 that is rotatably embedded in the mounting housing 21 and connected to the movable plate 24. By rotating the connecting frame 25, the opening and closing of the movable plate 24 and the fixed plate 23 can be controlled. In order to limit the position of the driven wheel 32, as shown in FIG. Figure 7 As shown, the connecting frame 25 is provided with a first annular slot 251, and the mounting ring 31 is provided with a second annular slot 311. When the connecting frame 25, the mounting ring 31 and the driven wheel 32 are assembled, the first slot 251 cooperates with the second slot 311 to clamp and install the driven wheel 32.

[0073] like Figure 10 As shown, an adjustment mechanism 30 for controlling rotation is installed on the connecting frame 25. The adjustment mechanism 30 includes a mounting ring 31 mounted on the connecting frame 25 and a driven wheel 32 rotatably arranged on the surface of the mounting ring 31. A driving wheel 33 rotatably mounted on the bottom of the mounting housing 21 and engaged with the driven wheel 32. When the driving wheel 33 rotates, the connecting frame 25 is driven to rotate through the mounting ring 31 and the driven wheel 32.

[0074] The bottom of the connecting frame 25 is detachably mounted with a rotatable mounting shaft 34, such as Figure 11 As shown, one end of the mounting shaft 34 is provided with a rotatable positioning bolt 341 and is connected to the mounting housing 21 through the positioning bolt 341. The other end of the mounting shaft 34 passes through the outside of the mounting cavity 113 and is installed with a knob 342. The driving wheel 33 is sleeved on the surface of the mounting shaft 34.

[0075] By rotating the knob 342, the mounting shaft 34 brought by the knob 342 rotates under the restriction of the positioning bolt 341, and the mounting shaft 34 drives the driven wheel 32 to rotate through the driving wheel 33, so that the driven wheel 32 can drive the connecting frame 25 to rotate through the mounting ring 31, thereby achieving the purpose of controlling the opening and closing of the movable plate 24 and the fixed plate 23.

[0076] Furthermore, in order to form an unstable airflow in the monitoring chamber 11, as Figure 10 、 Figure 12-14 As shown, an acceleration mechanism 40 is further provided in the mounting housing 21. The acceleration mechanism 40 includes an annular rotating ring 41 rotatably embedded in the mounting housing 21 and a cover plate 45 fixedly mounted on the mounting housing 21. The airflow generated by the fan 13 enters the mounting housing 21 through the cover plate 45 and the rotating ring 41.

[0077] A guide groove 42 is formed on the surface of the rotating ring 41, and a sliding cavity 46 is fixedly mounted on the cover plate 45. A connector 43 is inserted into the guide groove 42 and the sliding cavity 46, and a gate 44 is mounted on the connector 43. When the rotating ring 41 rotates, the guide groove 42 pushes the connector 43 to move horizontally along the length of the sliding cavity 46. The connector 43 drives the gate 44 to move to adjust the outlet area of the rotating ring 41. The same volume of air will have different flow rates when passing through rotating rings 41 with different outlet areas.

[0078] The adjacent connecting member 43 includes a guide slider 431 embedded in the guide groove 42 and a positioning slider 432 embedded in the sliding cavity 46;

[0079] When the outlet area of the rotating ring 41 needs to be changed, the rotating ring 41 is rotated, causing the guide groove 42 to rotate. The inner wall of the guide groove 42 abuts against the guide slider 431 and pushes the guide slider 431, causing the guide slider 431 to drive the positioning slider 432 to slide within the sliding cavity 46. To improve the sliding stability of the positioning slider 432, guide rails 461 are provided on both sides of the inner wall of the sliding cavity 46, which engage with the positioning slider 432. Within the constraints of the sliding cavity 46 and the guide rails 461, the positioning slider 432 can only move horizontally along the length of the sliding cavity 46. The positioning slider 432 drives the gate plate 44 to move. As the gate plate 44 moves toward the center of the rotating ring 41, the outlet area of the rotating ring 41 gradually decreases. A smaller air outlet increases the air flow rate when it flows out, because the same volume of air needs to flow out over a smaller outlet area, resulting in a higher flow rate and greater wind force. Conversely, a larger air outlet reduces the wind speed at the outlet, thereby achieving the purpose of generating a variable, unstable airflow.

[0080] According to the relationship between airflow stability and the resistance of oat stems to lodging, airflow stability refers to the continuity and stability of wind force. Stable wind force may enable oat stems to gradually adapt to and resist the effects of wind, while unstable wind force may cause the stems to be suddenly subjected to greater impact force, making them more likely to fall over.

[0081] Under conditions of unstable wind, oat stalks need to constantly adapt to changes in wind, which will increase the fatigue of the stalks and reduce their resistance to lodging. Under conditions of frequent changes in wind, the stalks may not be able to adapt in time and may fall over. By randomly adjusting the flow rate of the turned-on fan 13, unstable airflow is generated inside the monitoring chamber 11 to simulate the wind changes that may occur in the actual environment.

[0082] It should be noted that the adjustment of the airflow stability of the fan 13 is achieved by changing the outlet area of the rotating ring 41. The flow rate may decrease while the flow rate is increased. If the fan 13 for extracting the air in the monitoring chamber 11 is not adjusted, the air in the monitoring chamber 11 may be extracted faster, resulting in the air pressure inside the monitoring chamber 11 being lower than the external environment, forming a negative pressure. In order to avoid this situation, the number of fans 13 opened on both sides of the monitoring chamber 11 must be the same, and the adjustment of the airflow stability of the fan 13 is not suitable for long-term maintenance.

[0083] Further, such as Figure 13 As shown, a connecting groove 421 is provided between the guide grooves 42. When the guide slider 431 moves in the guide grooves 42 and the connecting grooves 421, it drives the gate plate 44 to move back and forth. Through this design, the unidirectional rotation of the rotating ring 41 can drive the gate plate 44 to control the increase and decrease of the outlet area of the rotating ring 41. The rotating ring 41 does not need to rotate in the opposite direction to control the movement of the gate plate 44.

[0084] At the same time, the length of the connecting groove 421 is shorter than the guide groove 42. When the rotating ring 41 rotates by the same amplitude, the stroke of the guide slider 431 and the positioning slider 432 guided by the guide groove 42 in the sliding cavity 46 is shorter than the stroke of the guide slider 431 and the positioning slider 432 guided by the connecting groove 421 in the sliding cavity 46. In the process of adjusting the airflow stability, the change from low flow rate to high flow rate needs to be completed quickly to achieve the purpose of suddenly applying a large impact force to the oat stalks. Therefore, when the rotation speed and amplitude of the rotating ring 41 are the same, the stroke of the guide slider 431 in the connecting groove 421 is shorter, and the change from high flow rate to low flow rate has less effect on the oat stalks. In order to be able to observe the process of the oat stalks shaking rate gradually decreasing after the wind force continues to weaken, the stroke of the guide slider 431 in the guide groove 42 is set to be longer.

[0085] In order to simultaneously realize the opening and closing of the fan 13 and the change of the air flow stability of the fan 13 by rotating the driven wheel 32, as shown in FIG. Figures 15-19 As shown, the rotation of the movable plate 24 and the movement of the gate plate 44 are both achieved by rotating the driven wheel 32, and the driven wheel 32 is connected to the mounting ring 31 and the rotating ring 41 through the switching mechanism 50;

[0086] The driven wheel 32 includes a first gear 321 engaged in the first slot 251 and the second slot 311, a second gear 322 connected to the first gear 321, and a first gear ring 323 embedded in the first gear 321 and the second gear 322. The rotating ring 41 is mounted with a second gear ring 55. The teeth on the first gear ring 323 and the second gear ring 55 are arranged to be parallel on one side and inclined on the other side.

[0087] The switching mechanism 50 includes a plurality of first hinge shafts 51 provided on the mounting ring 31 and a second hinge shaft 53 provided on the second gear 322. A first hook 52 is rotatably provided on the first hinge shaft 51 and intermeshed with the first gear ring 323. A second hook 54 is rotatably provided on the second hinge shaft 53 and intermeshed with the second gear ring 55. The ends of the first hook 52 and the second hook 54 are both configured as flat surfaces and inclined surfaces that cooperate with the first gear ring 323 and the second gear ring 55.

[0088] Preferably, when the staff rotates the knob 342 clockwise, the driving wheel 33 drives the driven wheel 32 to rotate. At this time, the inclined surfaces of the first hook 52 and the first gear ring 323 abut against each other, and the driven wheel 32 cannot drive the mounting ring 31 to rotate through the first gear ring 323. At the same time, the planes of the second hook 54 and the second gear ring 55 abut against each other, and the driven wheel 32 can drive the rotating ring 41 to rotate through the second hook 54 and the second gear ring 55, thereby changing the airflow stability of the fan 13.

[0089] Conversely, when the staff rotates the knob 342 counterclockwise, the planes of the first hook 52 and the first gear ring 323 abut against each other, and the driven wheel 32 drives the mounting ring 31 to rotate through the first gear ring 323, so that the mounting ring 31 controls the rotation of the movable plate 24 through the connecting frame 25, so as to achieve the purpose of controlling the opening and closing of the fan 13. At the same time, the inclined surfaces of the second hook 54 and the second gear ring 55 abut against each other, and the rotation of the driven wheel 32 does not affect the rotating ring 41.

[0090] The present invention also provides a method for monitoring the anti-lodging of oat stalks, which is applied to the above-mentioned anti-lodging monitoring device for oat stalks. The specific steps of use are as follows:

[0091] S1. Open the monitoring chamber 11 and set it on the pre-selected oats to be tested, turn on the power 12, so that the light emitting component 14 emits a directional light source, the shadow of the oats is projected on the inner wall of the monitoring chamber 11 away from the light emitting component 14;

[0092] S2. By rotating the mounting shaft 34, the movable plate 24 rotates inside the mounting housing 21, and the fan 13 is connected to the monitoring chamber 11 through the gap between the fixed plate 23 and the movable plate 24. The fan 13 can inject air into the monitoring chamber 11, while the fan 13 on the other side can extract air from the monitoring chamber 11;

[0093] S3. Depending on the test item, the fan 13 is turned on in different numbers and positions to change the airflow rate and direction. The position of the gate 44 is adjusted by reversing the mounting shaft 34 to adjust the outlet area of the rotating ring 41. The same volume of air flows through the rotating ring 41 with different outlet areas at different flow rates, providing multiple variables for the experiment.

[0094] S4 oat stems tilted under the influence of airflow, the position and shape of the shadow changes, captured by the monitoring probe 15, the change has been achieved to reflect the degree of bending of the stems;

[0095] S5. Use image processing to extract shadow changes from the video, track shadow movement and deformation, and evaluate the stem's resistance to lodging by analyzing the shadow's changing rate, amplitude, and frequency. A sudden increase in the shadow area when the stem lodges, or an accelerated movement of the shadow edge, indicates that the stem is about to break.

[0096] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited to this. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes to an oat stem anti-lodging monitoring device and method and its inventive concept according to the technology of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. An oat stalk anti-lodging monitoring device, comprising a monitoring device body (10), the monitoring device body (10) comprising a monitoring chamber (11) covered on the oats and a plurality of fans (13) installed on both sides of the monitoring chamber (11), characterized in that: A photovoltaic module (14) for projecting light onto the oats and a monitoring probe (15) for photographing the shadows of the oats are installed inside the monitoring chamber (11); The fans (13) on both sides form airflow in the monitoring chamber (11) by introducing and discharging air to blow the oat stalks to bend, and the monitoring probe (15) captures the shadow changes of the oat stalks after bending; The fan (13) is controlled to open and close by an opening and closing mechanism (20). The opening and closing mechanism (20) comprises a mounting shell (21) mounted on the fan (13) and having an air duct opened in the middle. A fixed plate (23) and a rotatable movable plate (24) are provided on the inner wall of the air duct. The movable plate (24) rotates to cooperate with the fixed plate (23) to control the opening and closing of the air duct. Different heights and different numbers of mounting shells (21) are opened to form different types of airflow in the monitoring chamber (11).

2. The oat stalk anti-lodging monitoring device according to claim 1, characterized in that: The fan (13) is provided with mounting cavities (113) on both sides, the mounting shell (21) is mounted inside the mounting cavity (113), and a mounting platform (22) is mounted outside the mounting cavity (113), the mounting shell (21) and the mounting platform (22) are connected by bolts passing through the mounting cavity (113), and the fan (13) is fixedly mounted on the mounting platform (22).

3. The oat stalk anti-lodging monitoring device according to claim 2, characterized in that: The opening and closing mechanism (20) further includes a connecting frame (25) rotatably embedded in the mounting housing (21) and connected to the movable plate (24), and an adjusting mechanism (30) for controlling rotation is installed on the connecting frame (25); The adjusting mechanism (30) comprises a mounting ring (31) mounted on the connecting frame (25) and a driven wheel (32) rotatably arranged on the surface of the mounting ring (31); a driving wheel (33) rotatably mounted on the bottom of the mounting housing (21) and meshing with the driven wheel (32); when the driving wheel (33) rotates, the connecting frame (25) is driven to rotate via the mounting ring (31) and the driven wheel (32).

4. The oat stalk anti-lodging monitoring device according to claim 3, characterized in that: The connecting frame (25) is provided with an annular first clamping groove (251), and the mounting ring (31) is provided with an annular second clamping groove (311). When the connecting frame (25) and the mounting ring (31) are connected, the first clamping groove (251) cooperates with the second clamping groove (311) to mount the driven wheel (32).

5. The oat stalk anti-lodging monitoring device according to claim 3, characterized in that: A rotatable mounting shaft (34) is detachably mounted on the bottom of the connecting frame (25); one end of the mounting shaft (34) is provided with a rotatable positioning bolt (341) and is connected to the mounting housing (21) via the positioning bolt (341); the other end of the mounting shaft (34) passes through the outside of the mounting cavity (113) and is provided with a rotating knob (342); The driving wheel (33) is sleeved on the surface of the installation shaft (34).

6. The oat stalk anti-lodging monitoring device according to claim 1, characterized in that: An acceleration mechanism (40) is further provided in the mounting housing (21), the acceleration mechanism (40) comprising an annular rotating ring (41) rotatably embedded in the mounting housing (21) and a cover plate (45) fixedly mounted on the mounting housing (21), and the airflow generated by the fan (13) enters the mounting housing (21) through the cover plate (45) and the rotating ring (41); The surface of the rotating ring (41) is provided with a guide groove (42) and a sliding cavity (46) is fixedly installed on the cover plate (45). A connecting piece (43) is inserted into the guide groove (42) and the sliding cavity (46), and a gate plate (44) is installed on the connecting piece (43). When the rotating ring (41) rotates, the connecting piece (43) is pushed by the guide groove (42) to move horizontally along the length direction of the sliding cavity (46). The connecting piece (43) drives the gate plate (44) to move to adjust the outlet area of the rotating ring (41). When the same volume of air passes through the rotating ring (41) with different outlet areas, the flow rate varies.

7. The oat stalk anti-lodging monitoring device according to claim 6, characterized in that: The adjacent connecting member (43) includes a guide slider (431) embedded in the guide groove (42) and a positioning slider (432) embedded in the sliding cavity (46). Guide rails (461) embedded with the positioning slider (432) are provided on both sides of the inner wall of the sliding cavity (46).

8. The oat stalk anti-lodging monitoring device according to claim 7, characterized in that: A communicating groove (421) is provided between the plurality of guide grooves (42), and the guide slider (431) drives the gate plate (44) to move back and forth when moving in the guide groove (42) and the communicating groove (421); The length of the connecting groove (421) is shorter than that of the guide groove (42). When the rotating ring (41) rotates with the same amplitude, the travel of the guide slider (431) and the positioning slider (432) in the sliding cavity (46) guided by the guide groove (42) is shorter than the travel of the guide slider (431) and the positioning slider (432) in the sliding cavity (46) guided by the connecting groove (421).

9. The oat stalk anti-lodging monitoring device according to claim 7, characterized in that: The rotation of the movable plate (24) and the movement of the gate plate (44) are both achieved by rotating the driven wheel (32), and the driven wheel (32) is connected to the mounting ring (31) and the rotating ring (41) through a switching mechanism (50); The driven wheel (32) comprises a first gear (321) embedded in the first slot (251) and the second slot (311), a second gear (322) connected to the first gear (321), and a first gear ring (323) embedded inside the first gear (321) and the second gear (322); a second gear ring (55) is mounted on the rotating ring (41); and the teeth on the first gear ring (323) and the second gear ring (55) are both arranged to be parallel on one side and inclined on the other side; The switching mechanism (50) includes a plurality of first hinge shafts (51) arranged on the mounting ring (31) and a second hinge shaft (53) arranged on the second gear (322); a first hook (52) that meshes with the first gear ring (323) is rotatably arranged on the first hinge shaft (51); and a second hook (54) that meshes with the second gear ring (55) is rotatably arranged on the second hinge shaft (53); The driven wheel (32) drives any one of the mounting ring (31) and the rotating ring (41) to rotate when rotating forward or reverse.

10. A method for monitoring the lodging resistance of oat stalks, using the oat stalk lodging resistance monitoring device according to any one of claims 1 to 9, characterized in that: The monitoring method includes the following steps: S1. Open the monitoring chamber (11) and set it on the pre-selected oats to be tested, turn on the power supply (12), so that the photovoltaic module (14) emits a directional light source, and casts the shadow of the oats on the inner wall of the monitoring chamber (11) away from the photovoltaic module (14); S2. By rotating the mounting shaft (34), the movable plate (24) rotates inside the mounting housing (21), and the fan (13) is connected to the monitoring chamber (11) through the gap between the fixed plate (23) and the movable plate (24). The fan (13) can inject air into the monitoring chamber (11), and the fan (13) on the other side can extract air from the monitoring chamber (11); S3. Depending on the item to be tested, fans (13) of different numbers and positions are turned on to change the flow rate and direction of the air flow. The position of the gate (44) is adjusted by reversing the mounting shaft (34) to adjust the outlet area of the rotating ring (41). The same volume of air has a different flow rate when passing through the rotating ring (41) with different outlet areas, providing multiple variables for the experiment; S4. The oat stems tilt under the influence of airflow, and the position and shape of the shadow change. The changes are photographed by the monitoring probe (15) to achieve the purpose of reflecting the degree of bending of the stems; S5. Use image processing to extract shadow changes from the video, track shadow movement and deformation, and evaluate the stem's resistance to lodging by analyzing the shadow's changing rate, amplitude, and frequency. A sudden increase in the shadow area when the stem lodges, or an accelerated movement of the shadow edge, indicates that the stem is about to break.

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