Agricultural sunshade system and control method thereof

Abstract

The invention discloses an agricultural sun-shading system and a control method thereof.The system comprises a sun-shading plate arranged on a roof, the roof is of a continuous up-and-down structure, a first supporting base is arranged at the valley bottom of the roof, and the lower portion of the sun-shading plate is connected with the first supporting base through a rotating shaft; a second supporting seat is arranged on the peak top of the roof, a winch assembly is arranged on the second supporting seat, the upper portion of the sun shield is connected with the winch assembly on the peak top on one side through a traction rope, and the upper portion of the sun shield is connected with the winch assembly on the peak top on the other side or a balancing weight through a traction rope. According to the agricultural sunshade system, the luminous flux in a room can be adjusted through the arrangement of the sunshade plate capable of being adjusted in a deflection mode, when the sunshade plate is located outside a greenhouse, under the condition that the illumination intensity requirement of plants is met, the sunshade plate can be controlled to shield sunlight so that the plants can be protected against excessive illumination damage, and the service life of the plants is prolonged. And meanwhile, the greenhouse can be cooled by shielding sunlight.

Description

Technical Field

[0001] The invention relates to the technical field of roof shading, and in particular to an agricultural shading system and a control method thereof. Background Art

[0002] Glass greenhouse refers to a greenhouse that uses glass as a lighting material. It is a type of greenhouse. Among cultivation facilities, glass greenhouses have the longest service life and are suitable for use in a variety of regions and climate conditions. The area and usage can be freely adjusted by the greenhouse owner. The smallest one is a courtyard leisure type, and the largest one is a glass building with a height of more than 10 meters and a span of more than ten meters.

[0003] Usually, there is a sunshade system on the top of the glass greenhouse. When the sunlight intensity is too strong, the sunshade system is often adjusted to reduce the light intensity radiating to the plant leaves to ensure the normal growth of the plants. The traditional greenhouse sunshade system uses a sunshade net to provide sunshade by scaling the sunshade area. This method not only requires a complex support structure on the top of the greenhouse, but also cannot achieve zero sunshade. Summary of the invention

[0004] The purpose of the present invention is to provide an agricultural sunshade system and a control method thereof in view of the problems existing in the prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is: An agricultural shading system comprises a sunshade arranged on a roof, wherein the roof is a continuously undulating structure, a first support seat is provided at the valley bottom of the roof, and the sunshade is swung by a driving mechanism arranged on the roof; the driving mechanism comprises a second support seat arranged on the peak of the roof, a winch assembly is provided on the second support seat, the upper part of the sunshade is connected to the winch assembly on the peak of one side by a traction rope, and the upper part of the sunshade is connected to the winch assembly on the peak of the other side by a traction rope or a counterweight block or a fixed pulley; or, the driving mechanism comprises a driving motor arranged on the roof, and a traction rod connected to the sunshade, and the driving motor is connected to and drives the traction rod through a transmission assembly.

[0006] The agricultural shading system can adjust the light flux in the house by setting a deflectable and adjustable sunshade. When the sunshade is located outside the greenhouse, the sunshade can be controlled to block sunlight to protect the plants from being damaged by excessive light while ensuring the light intensity requirements of the plants. At the same time, the greenhouse can also be cooled by blocking sunlight.

[0007] By using the sunshade, shading is performed by deflecting the angle of the sunshade and the sunlight, and zero shading or full shading can be achieved. Compared with the traditional sunshade net system, it has more shading advantages and adjustability; and the overall structure is simple, and the installation is relatively simple and convenient, without the need to set up a complex support system on the roof.

[0008] Furthermore, a sunshade is provided in each valley bottom unit of the roof, and the rotation axis of the sunshade is located on the angle bisector of the valley bottom.

[0009] Furthermore, each valley unit of the roof is provided with a pair of parallel sunshades, the two sunshades are respectively connected to the first support seat via a rotating shaft, and the two sunshades are respectively deflected toward the peak direction on the side.

[0010] Furthermore, the hoisting assembly includes a hoisting shaft and a servo motor connected to and driving the hoisting shaft, the hoisting shaft is supported on the second support seat through a bearing seat, and the servo motor is installed on the second support seat through a machine foot. The servo motor drives the hoisting shaft to rotate forward and reverse, and reel in or release the traction rope, so that the sun visor is deflected and the sun visor can be suspended at any angle.

[0011] In some embodiments, a plurality of pulley brackets are provided at the peak of the roof, a fixed pulley is provided on the pulley bracket, the traction rope on one side is wound around the fixed pulley and connected to the counterweight block, or, a plurality of pulley brackets are provided at the peak and valley bottom of the roof respectively, a fixed pulley is provided on the pulley bracket, and the traction rope returns to the winch assembly after winding around the fixed pulleys at the peak and valley bottom.

[0012] Furthermore, a plurality of connection holes or connection rings are provided on the top of the sun visor, and the connection holes or the connection rings are used to connect the traction rope. This connection method is simple and convenient.

[0013] Furthermore, the sun visor is a solar panel; the sun visor is also provided with a light intensity sensor, which can obtain the light intensity value in real time.

[0014] Furthermore, the roof is a glass room roof of a glass greenhouse, the continuous high and low undulating structure is a connecting V-shaped groove structure arranged along the width direction of the glass greenhouse, and a plurality of the sunshades are arranged in sequence at each V-shaped groove structure along the length direction of the glass greenhouse.

[0015] A control method for an agricultural shading system, comprising: providing a support plate one and a support plate two above the shading plate, with an angle a between the support plate one and the support plate two; providing a light intensity sensor on the front and back sides of the support plate one, denoted as A1 and A2; providing a strong light sensor on the front and back sides of the support plate two, denoted as B1 and B2; comparing the sum of the light intensity values ​​of A1+A2 with the sum of the light intensity values ​​of B1+B2, and determining the direction of deflection of the shading plate according to the size of the sum of the light intensity values.

[0016] Furthermore, the control method further comprises the following steps: Assume that the real-time detected light intensity inside the glass greenhouse is S1, and the most suitable light intensity range for the glass greenhouse is set to Smin~Smax according to different crops; Determine whether S1 is greater than Smax, If not, skip to the next step. If so, compare the sum of the light intensity values ​​of A1+A2 with the sum of the light intensity values ​​of B1+B2. If the sum of the light intensity values ​​of A1+A2 is greater than the sum of the light intensity values ​​of B1+B2, adjust the sun visor to deflect in the direction of the support plate one; if the sum of the light intensity values ​​of A1+A2 is less than the sum of the light intensity values ​​of B1+B2, adjust the sun visor to deflect in the direction of the support plate two; Determine whether S1 is less than Smin, If not, it indicates that the sun visor is in the right position and no adjustment is made. If so, compare the sum of the light intensity values ​​of A1+A2 with the sum of the light intensity values ​​of B1+B2. If the sum of the light intensity values ​​of A1+A2 is greater than the sum of the light intensity values ​​of B1+B2, adjust the sun visor to deflect toward the direction of support plate two. If the sum of the light intensity values ​​of A1+A2 is less than the sum of the light intensity values ​​of B1+B2, adjust the sun visor to deflect toward the direction of support plate one.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The agricultural sunshade system can adjust the light flux in the house by setting a deflectable sunshade. When the sunshade is located outside the greenhouse, the sunshade can be controlled to block the sunlight to protect the plants from being damaged by excessive light while ensuring the light intensity requirements of the plants. At the same time, the greenhouse can be cooled by blocking the sunlight; 2. When the sunshade is a solar panel, power output can be achieved without affecting the growth of plants, and power can be generated while shading and cooling; 3. By deflecting the angle between the sunshade and the sunlight, Sunshade can achieve zero shading or full shading. Compared with the traditional sunshade net system, it has more shading advantages and adjustability. Moreover, the overall structure is simple, and the installation is relatively simple and convenient, without the need to set up a complex support system on the roof. 4. This agricultural shading system can also maintain the greenhouse light flux within the set range through intelligent algorithms combined with the automatic control of the sunshade, without the need for frequent manual adjustment. The control method can more accurately control the direction and angle of the deflection of the sunshade, and can adaptively adjust the sunshade according to the position of sunlight and the indoor light intensity, with a high level of automation and intelligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall layout of an agricultural sunshade system of the present invention; Figure 2 It is a partial structural schematic diagram of an agricultural sunshade system of the present invention; Figure 3 A schematic structural diagram of a sunshade for an agricultural sunshade system according to the present invention; Figure 4 This is a schematic structural diagram of a winch assembly of an agricultural sunshade system of the present invention; Figure 5 It is a schematic diagram of another arrangement structure of a sunshade of an agricultural sunshade system of the present invention; Figure 6 A schematic diagram of the forces acting on a sunshade of an agricultural sunshade system of the present invention; Figure 7 It is a schematic diagram of another arrangement structure of a sunshade of an agricultural sunshade system of the present invention; Figure 8 This is a front structural schematic diagram of a support plate provided on the sun visor of the present invention; Fig. 9 It is a schematic diagram of the side structure of a support plate provided on the sunshade of the present invention; Fig.10 This is a schematic diagram of a light intensity sensor being arranged on a support plate of the present invention; Fig.11 This is a flow chart of a control method for an agricultural sunshade system according to the present invention; Fig.12A schematic diagram of another driving mechanism connected to a sun visor according to the present invention; Fig.13 for Fig.12 Schematic diagram of the middle driving mechanism driving the sun visor to the left extreme position; Fig.14 for Fig.12 Schematic diagram of the middle driving mechanism driving the sun visor to the right extreme position; Fig.15 for Fig.12 A top view schematic diagram of the middle drive mechanism; Fig.16 for Fig.12 Schematic diagram of the connection between the middle sun visor, the tow bar and the push-pull rod; In the figure: 1. Glass greenhouse; 2. Roof; 3. First support seat; 4. Sunshade; 5. Second support seat; 6. Traction rope; 7. Rotating shaft; 8. Connecting hole; 9. Winch shaft; 10. Servo motor; 11. Bearing seat; 12. Support plate one; 13. Support plate two; 14. Light intensity sensor; 15. Fixed pulley; 16. Traction rod; 17. Fixed bracket; 18. Driving motor; 19. Long screw; 20. Slider; 21. Push-pull rod; 22. Guide rod; 23. Bearing support seat; 24. Articulated seat. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings 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.

[0020] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Example 1

[0021] like Figure 1 to Figure 4As shown, an agricultural shading system includes a sunshade 4 arranged on a roof 2, wherein the roof 2 is a continuously undulating structure, a first support seat 3 is provided at the valley bottom of the roof 2, and the bottom of the sunshade 4 is connected to the first support seat 3 through a rotating shaft 7; a second support seat 5 is provided at the peak of the roof 2, and a winch assembly is provided on the second support seat 5, the top of the sunshade 4 is connected to the winch assembly on the peak on one side through a traction rope 6, and the top of the sunshade 4 is connected to the winch assembly on the peak on the other side through the traction rope 6 or the counterweight block.

[0022] The agricultural shading system can adjust the light flux in the house by setting a deflectable and adjustable sunshade 4. When the sunshade 4 is located outside the greenhouse, the sunshade 4 can be controlled to block the sunlight to protect the plants from being damaged by excessive light while ensuring the light intensity requirements of the plants. At the same time, the greenhouse can also be cooled by blocking the sunlight.

[0023] When the sun visor 4 is parallel to the sunlight, the sun visor has a minimum shading rate and can achieve no shading; the maximum shading rate is related to the solar incident angle. When the angle between the sunlight and the ground is less than 30 degrees, basically 100% shading can be achieved. When the angle between the sunlight and the ground is 90 degrees, the maximum shading coefficient is about 50%.

[0024] By using the sun visor 4, shading is performed by deflecting the angle of the sun visor and the sunlight, which can achieve zero shading or full shading. Compared with the traditional sunshade net system, it has more shading advantages and adjustability; and the overall structure is simple, and the installation is relatively simple and convenient, without the need to set up a complex support system on the roof.

[0025] The agricultural shading system can also maintain the greenhouse light flux within a set range through intelligent algorithms combined with automatic control of the shading panels, without the need for frequent manual adjustments.

[0026] The first support seat 3 and the rotating shaft 7 are configured to rotationally support the sun visor 4. By utilizing the traction control of the winch assembly and the traction rope 6, the sun visor 4 can be deflected within a certain range. For example, in this embodiment, the angle at the trough of the roof is in the range of 120°-170°, so the sun visor can also be deflected within this range.

[0027] The second support base 5 is mainly used to support the hoisting assembly so as to install it on the roof. The second support base 5 and the hoisting assembly can be arranged in groups in plurality, and are respectively connected to sunshades at different positions and in different directions.

[0028] For the sun visor 4, it needs to reciprocate within a certain range. The traction rope arranged on only one side of the sun visor cannot meet the adjustment requirements. Therefore, a traction rope is also arranged on the other side of the sun visor. Figure 6 As shown, the sun visor is subjected to traction forces (such as F1 and F2) at adjacent wave crests, and the sun visor is deflected by changing the forces of F1 and F2. F1 and F2 can be connected to motors respectively to achieve sun visor deflection by retracting and releasing the traction rope, or one of them (such as F2) can be connected to a fixed weight block, and the other (such as F1) can be controlled by the motor to retract and release.

[0029] In some embodiments, a sunshade 4 is provided in each valley unit of the roof 2, and the rotation axis of the sunshade 4 is located on the angle bisector of the valley. In this way, a sunshade can be deflected within the range between the left and right inclined planes to adjust the sunshade. In this structure, the first support seat is supported in the middle of the valley angle, and it is an inverted Y-shaped structure, which can be supported on the inclined planes on both sides.

[0030] In some embodiments, Figure 5 As shown, a pair of parallel sunshades 4 are provided in each valley unit of the roof 2, and the two sunshades 4 are respectively connected to the first support seat 3 through a rotating shaft, and the two sunshades 4 are respectively deflected toward the peak direction of the side.

[0031] In this way, the two sun visors 4 can be controlled to deflect on their respective sides, that is, the left sun visor deflects on the left side, and the right sun visor deflects on the right side, and when they are both vertical, they are parallel and close to each other. In this way, the first support seat 3 can be a pair of two inclined planes on both sides, supporting the sun visors on their respective sides.

[0032] Furthermore, the hoisting assembly includes a hoisting shaft 9 and a servo motor 10 connected to and driving the hoisting shaft 9. The hoisting shaft 9 is supported on the second support seat 5 through a bearing seat 11, and the servo motor 10 is installed on the second support seat 5 through a machine foot.

[0033] The servo motor 10 drives the hoist shaft 9 to rotate forward and reversely, and reel in or release the traction rope 6, so that the sun visor 4 is deflected and the sun visor 4 can be suspended at any angle. If the sun visor is controlled by using a double-sided multi-group hoist assembly, the hoist shaft on one side is reeling in the traction rope, and the hoist shaft on the other side is releasing the traction rope. The two traction ropes can be the same or two connected separately.

[0034] In some embodiments, a plurality of pulley brackets are further provided at the peak of the roof, and a fixed pulley is provided on the pulley bracket, and the traction rope on one side is wound around the fixed pulley and connected to the counterweight block. When one side of the sun visor is pulled by the traction rope, the counterweight block on the other side can use its gravity to maintain the sun visor, so that the sun visor can hover at any angle.

[0035] In some embodiments, Figure 7 As shown, the peak and valley of the roof are respectively provided with a plurality of pulley brackets, and the pulley brackets are provided with fixed pulleys 15 (or pulley groups), and the traction rope 6 is returned to the hoisting assembly after winding around the fixed pulleys 15 at the peak and valley. The traction rope 6 is connected to the adjacent sunshade 4 after winding around the fixed pulley 15 at the peak, and after the sunshade 4 of each row is strung in sequence, the traction rope is then turned around the fixed pulleys at the peak and the fixed pulleys at the valley to return to the hoisting assembly. Through the arrangement of the traction rope 6 and the plurality of fixed pulleys 15 arranged at high and low positions, the sunshades of each row can be connected in series, and when the hoisting assembly is retracted and lowered, the angle is adjusted by synchronous deflection, and it is not necessary to set a lot of hoisting assemblies, and the hoisting assembly can be set only on both sides, or only on one side. The pulley bracket can be arranged staggered with the first support seat or the second support seat, or the pulley bracket at the peak is installed on the second support seat, and the pulley bracket at the valley bottom is installed in the neutral position between a pair of first support seats.

[0036] When the tops of the sunshades are integrally connected by traction ropes, they are not in contact with the peaks in the case of synchronous deflection.

[0037] Furthermore, a plurality of connection holes 8 or a plurality of connection rings are provided on the top of the sun visor 4, and the connection holes 8 or the connection rings are used to connect the traction rope 6. This connection method is simple and convenient.

[0038] Furthermore, the sunshade 4 is a simple sunshade, or it can be a solar panel, which can generate electricity while providing shade and cooling. When the sunshade is a solar panel, power output can be achieved without affecting plant growth. At this time, the primary purpose of the sunshade is still to provide shade and adjust the indoor light intensity, but during the shading process, it can absorb light energy and convert it into electrical energy. For large glass greenhouses, the electrical energy generated by the setting of these solar sunshades is fully capable of supplying electricity to the entire glass greenhouse. It should be noted that when adjusting the angle of the sunshade, the primary purpose is not to absorb sunlight to generate electricity.

[0039] In some embodiments, light intensity sensors are provided on both sides of the sun visor 4, respectively, which can obtain the light intensity value in real time, and the purpose is to control the direction and angle of deflection of the sun visor according to the light intensity value.

[0040] For example, two support plates with an angle are set above the sun visor, and they can be staggered; a light intensity sensor is set on the front and back sides of the two support plates respectively, and the sum of the light intensity values ​​on the front and back sides of the two support plates is compared, and the deflection direction of the sun visor is determined according to the sum of the light intensity values.

[0041] Furthermore, the roof 2 is the glass room roof of the glass greenhouse 1, and the continuous high and low undulating structure is a connecting V-shaped groove structure arranged along the width direction of the glass greenhouse, and a plurality of the sunshades are arranged in sequence at each V-shaped groove structure along the length direction of the glass greenhouse. Example 2

[0042] Combination Figure 8 to Figure 10 As shown, a control method for an agricultural sunshade system is provided, wherein a support plate 12 and a support plate 2 13 are provided above the sunshade plate 4, and an angle a exists between the support plate 12 and the support plate 2 13; a light intensity sensor 14 is provided on the front and back sides of the support plate 12, respectively, and is denoted as A1 and A2; a strong light sensor 14 is also provided on the front and back sides of the support plate 2 13, respectively, and is denoted as B1 and B2, and A1, A2, B1 and B2 together form a composite light intensity sensor unit; by comparing the sum of the light intensity values ​​of A1+A2 and the sum of the light intensity values ​​of B1+B2, it can be known in which direction the sunshade plate is deflected to obtain a greater or lesser sunshade effect (or light shielding degree), that is, the direction of the sunshade plate deflection is determined according to the size of the sum of the light intensity values. If the value of A1+A2 is relatively large, deflecting in the direction A (the direction of the support plate 1) can obtain a greater light shielding effect, and vice versa, a smaller sunshade effect can be obtained.

[0043] Further, combined with Fig.10 and Fig.11 As shown, the control method also includes the following steps: Assume that the real-time detected light intensity inside the glass greenhouse is S1, and the most suitable light intensity range for the glass greenhouse is set to Smin~Smax according to different crops; P1: Determine whether S1 is greater than Smax, If not, jump to the next step P2. If so, it is determined whether the sum of the light intensity values ​​of A1+A2 is greater than the sum of the light intensity values ​​of B1+B2, that is, the sum of the light intensity values ​​of A1+A2 is compared with the sum of the light intensity values ​​of B1+B2. If the sum of the light intensity values ​​of A1+A2 is greater than the sum of the light intensity values ​​of B1+B2, the sun visor is adjusted to deflect toward the direction of the support plate 1 (deflect toward A). If the sum of the light intensity values ​​of A1+A2 is less than the sum of the light intensity values ​​of B1+B2, the sun visor is adjusted to deflect toward the direction of the support plate 2 (deflect toward B). The deflection angle can be angle a.

[0044] P2: Determine whether S1 is less than Smin, If not, it indicates that the sun visor is in the right position and no adjustment is made. If so, determine whether the sum of the light intensity values ​​of A1+A2 is greater than the sum of the light intensity values ​​of B1+B2, that is, compare the sum of the light intensity values ​​of A1+A2 with the sum of the light intensity values ​​of B1+B2. If the sum of the light intensity values ​​of A1+A2 is greater than the sum of the light intensity values ​​of B1+B2, adjust the sun visor to deflect toward the direction of support plate two (deflect toward B); if the sum of the light intensity values ​​of A1+A2 is less than the sum of the light intensity values ​​of B1+B2, adjust the sun visor to deflect toward the direction of support plate one (deflect toward A).

[0045] The above method can more accurately control the direction and angle of the sun visor deflection, and can adaptively adjust the sun visor according to the position of sunlight and the indoor light intensity, with a high level of automation and intelligence. This method for determining which direction the sun visor deflects to obtain a greater or lesser illumination can be widely used in the fields of photovoltaic power generation and intelligent sunshade, especially in application scenarios where sunshade and power generation are coordinated. Example 3

[0046] This embodiment provides another technical solution for the synchronous swinging of the sunshade. The driving mechanism includes a driving motor arranged on the roof and a traction rod connected to the sunshade, and the driving motor is connected to and drives the traction rod through a transmission assembly.

[0047] Specifically, Figures 12 to 16 As shown, a fixed bracket 17 is provided on the side of the roof, and a rotatable long screw 19 and a driving motor 18 connected to and driving the long screw 19 are connected to the side of the fixed bracket 17; a movable (threaded) slider 20 is provided on the long screw 19, and a push-pull rod 21 is connected to one side of the slider 20 through a rotating shaft; a traction rod 16 is provided above the sun visor 4 on the roof, and the traction rod 16 is rotatably connected to the sun visor 4, and a hinge seat 24 is provided on the rightmost sun visor 4 (the sun visor close to the long screw), which can be one or more, and the end of the traction rod 16 and the end of the push-pull rod 21 are connected through the hinge seat 24.

[0048] When the driving motor 18 drives the long screw 19 to rotate, the slider 20 reciprocates on the long screw 19. Since each node is hinged or rotationally connected, the push-pull rod 21 allows the sun visor 4 to swing within a certain angle during the forward and backward movement. The driving motor can be a stepping motor with an output shaft, or a through-type screw stepping motor that combines a long screw and a motor.

[0049] When the slider 20 moves to the left limit position, the push-pull rod 21 pushes the traction rod 16 and the sun visor 4, allowing the sun visor 4 to swing to the left and be parallel to the slope on one side of the roof; when the slider 20 moves to the right limit position, the push-pull rod 21 pulls the traction rod 16 and the sun visor 4, allowing the sun visor 4 to swing to the right and be parallel to the slope on the other side of the roof. Through this arrangement, the entire row of sun visors 4 can be driven to move together synchronously, so that the roof is adjusted synchronously.

[0050] Furthermore, a guide rod 22 parallel to the long screw is provided on the side of the fixed bracket 17, and bearing support seats 23 are provided at both ends of the guide rod 22 respectively. The long screw 19 is connected to the bearing support seat 23, and the guide rod 22 itself can also be supported on the roof through a support rod; through such a setting, the supporting stability of the long screw 19 can be improved, and at the same time, a guide sleeve is provided on the guide rod 22, and the guide sleeve is connected to the slider 20, which can guide and limit the slider during the movement of the slider 20.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An agricultural sunshade system, comprising a sunshade panel arranged on a roof, characterized in that: The roof is a continuously undulating structure, a first support seat is provided at the valley bottom of the roof, the bottom of the sun visor is connected to the first support seat via a rotating shaft, and the sun visor is swung by a driving mechanism arranged on the roof; the driving mechanism includes a second support seat arranged on the peak of the roof, a winch assembly is provided on the second support seat, the top of the sun visor is connected to the winch assembly on the peak of one side via a traction rope, and the top of the sun visor is connected to the winch assembly on the peak of the other side via a traction rope or a counterweight or a fixed pulley; or, the driving mechanism includes a driving motor arranged on the roof, and a traction rod connected to the sun visor, and the driving motor is connected to and drives the traction rod via a transmission assembly.

2. The agricultural shading system according to claim 1, characterized in that: A sunshade is provided in each valley unit of the roof, and the rotation axis of the sunshade is located on the angle bisector of the valley.

3. The agricultural sunshade system according to claim 1, characterized in that: A pair of parallel sunshades are provided in each valley unit of the roof, and the two sunshades are respectively connected to the first support seat through a rotating shaft, and the two sunshades are respectively deflected toward the peak direction of the side.

4. The agricultural sunshade system according to claim 1, characterized in that: The hoisting assembly includes a hoisting shaft and a servo motor connected to and driving the hoisting shaft. The hoisting shaft is supported on the second support seat through a bearing seat, and the servo motor is installed on the second support seat through a machine foot.

5. The agricultural sunshade system according to claim 1, characterized in that: A plurality of pulley brackets are also provided at the peak of the roof, and a fixed pulley is provided on the pulley bracket. The traction rope on one side is wound around the fixed pulley and connected to the counterweight block; or, a plurality of pulley brackets are also provided at the peak and valley bottom of the roof, and a fixed pulley is provided on the pulley bracket. The traction rope returns to the winch assembly after winding around the fixed pulleys at the peak and valley bottom.

6. The agricultural sunshade system according to claim 1, characterized in that: A plurality of connection holes or connection rings are provided above the sun visor, and the connection holes or the connection rings are used to connect the traction rope.

7. The agricultural sunshade system according to claim 1, characterized in that: The sun visor is a solar panel; a light intensity sensor is also provided on the sun visor.

8. The agricultural sunshade system according to claim 1, characterized in that: The roof is the glass room roof of the glass greenhouse, the continuous high and low undulating structure is a connected V-shaped groove structure arranged along the width direction of the glass greenhouse, and a plurality of sunshades are arranged in sequence at each V-shaped groove structure along the length direction of the glass greenhouse.

9. The control method of the agricultural sunshade system according to any one of claims 1 to 8, characterized in that: A support plate one and a support plate two are arranged above the sun visor, and an angle a is provided between the support plate one and the support plate two; a light intensity sensor is respectively arranged on the front and back sides of the support plate one, which are denoted as A1 and A2; a strong light sensor is also respectively arranged on the front and back sides of the support plate two, which are denoted as B1 and B2; the sum of the light intensity values ​​of A1+A2 is compared with the sum of the light intensity values ​​of B1+B2, and the deflection direction of the sun visor is determined according to the size of the sum of the light intensity values.

10. The control method of the agricultural sunshade system according to claim 9, wherein the sunshade is arranged on the top of the glass greenhouse, characterized in that: The control method further comprises the following steps: Assume that the real-time detected light intensity inside the glass greenhouse is S1, and the most suitable light intensity range for the glass greenhouse is set to Smin~Smax according to different crops; Determine whether S1 is greater than Smax, If not, skip to the next step. If so, compare the sum of the light intensity values ​​of A1+A2 with the sum of the light intensity values ​​of B1+B2. If the sum of the light intensity values ​​of A1+A2 is greater than the sum of the light intensity values ​​of B1+B2, adjust the sun visor to deflect in the direction of the support plate one; if the sum of the light intensity values ​​of A1+A2 is less than the sum of the light intensity values ​​of B1+B2, adjust the sun visor to deflect in the direction of the support plate two; Determine whether S1 is less than Smin, If not, it indicates that the sun visor is in the right position and no adjustment is made. If so, compare the sum of the light intensity values ​​of A1+A2 with the sum of the light intensity values ​​of B1+B2. If the sum of the light intensity values ​​of A1+A2 is greater than the sum of the light intensity values ​​of B1+B2, adjust the sun visor to deflect toward the direction of support plate two. If the sum of the light intensity values ​​of A1+A2 is less than the sum of the light intensity values ​​of B1+B2, adjust the sun visor to deflect toward the direction of support plate one.

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