Seeding depth regulation and control device and method for corn no-tillage seeding synchronous monomer movement

Abstract

The invention relates to the technical field of seeding machine regulation and control, and discloses a corn no-tillage seeding synchronous single body movement seeding depth regulation and control device which comprises a seeding depth detection system, a traction frame, a transverse pipe, a plurality of profiling depth limiting wheels and a plurality of seeding single bodies with mechanical parallel four-rod profiling structures, and further comprises a longitudinal regulation mechanism, the longitudinal adjusting mechanism is fixedly connected between the seeding single body and the transverse pipe, the seeding depth detection system controls the movement of the longitudinal adjusting mechanism through a plurality of arranged hydraulic cylinders, the height of the seeding single body in the transverse direction is adjusted according to the change of different heights, the seeding depth is adjusted according to the terrain, and the transverse adjusting mechanism is installed between the transverse pipe and the traction frame. The corn no-tillage seeding synchronous monomer movement seeding depth regulation and control device can regulate the seeding depth in multiple directions, is suitable for seeding operation on various complex terrains, and can regulate the posture of a seeder to ensure stable seeding of a seeding device.

Description

Technical Field

[0001] The invention relates to the technical field of seed drill control, and in particular to a seeding depth control device and method for synchronous monomer movement of corn no-till seeding. Background Art

[0002] Appropriate sowing depth has a crucial impact on seed germination and seedling growth. If the sowing depth is too deep, the seeds need to consume too much energy to break through the thick soil layer when they emerge from the soil, which may cause difficulty in the emergence of seedlings, or even rot in the soil due to energy exhaustion. If the sowing depth is too shallow, the seeds are not easily affected by the external environment due to insufficient water supply and difficult to take root. For example, they are easily dried by the wind and pecked by birds, which is not conducive to the smooth germination of seeds and the healthy growth of subsequent seedlings. Sowing depth control is one of the important indicators of precision sowing technology and an important basis for judging the appropriate seed depth and agronomic requirements of crop sowing. Accurate sowing depth is one of the important means to increase crop yields. At present, there are mainly active control and passive control in the sowing depth regulation. Passive control mainly relies on the profiling structure and depth limiting wheel of the sowing unit to adjust, which can be used to maintain the target sowing depth, but has not achieved autonomous control. The problem that the consistency of sowing depth is easily affected by the field topography has not been solved. Active control mainly relies on air pressure or hydraulic pressure, air springs, electric push rods, etc. in conjunction with sensors to achieve automatic sowing depth control, so that the sowing depth can be adjusted under certain terrain conditions.

[0003] At present, the current corn no-till seeding depth control system is easily affected by the field environment in actual applications, especially when operating in terrain such as slopes and gullies, it has the disadvantages of low detection accuracy and slow response speed. Moreover, the seeding equipment will tilt with the terrain due to the influence of the traction equipment, which will also affect the seeding of the seeder. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the shortcomings of the prior art, the present invention provides a sowing depth control device and method for synchronous single-body movement of corn no-till sowing, which solves the problems of low detection accuracy and slow response speed of the detection and control device of the traditional seeder when operating in terrains such as slopes and gullies, and the sowing equipment will tilt with the terrain due to the influence of the traction equipment, which will also affect the seeding of the seeder.

[0005] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sowing depth control device for corn no-till sowing with synchronous monomer movement, comprising a sowing depth detection system, a traction frame, a cross tube, a plurality of contoured depth limiting wheels and a plurality of sowing monomers with a mechanical parallelepiped contouring structure, and further comprising: The longitudinal adjustment mechanism is fixedly connected between the seeding unit and the horizontal pipe. The seeding depth detection system controls the movement of the longitudinal adjustment mechanism through a plurality of hydraulic cylinders to adjust the height of the seeding unit in the horizontal direction at different heights, so as to adjust the seeding depth according to the terrain. The transverse adjustment mechanism is installed between the horizontal pipe and the towing frame. The seeding depth detection system controls the movement of the transverse adjustment mechanism through a hydraulic motor to adjust the parallelism between the horizontal pipe and the ground, changes the postures of a plurality of seeding units on the steep slope ground, enables the seeding units to always be in a vertical state for seed metering during seeding, and does not affect the longitudinal adjustment mechanism to adjust the seeding depth.

[0006] Preferably, the longitudinal adjustment mechanism includes a housing. A monomer fixing guide block is slidably connected in the housing. A plurality of guide posts are sleeved on the side wall of the monomer fixing guide block through guide holes, and all the guide posts are fixed in the housing. One side of the housing is fixedly connected to one side of the horizontal pipe. A circular hole is provided at the lower end of the housing. The hydraulic cylinder is fixed at the lower end of the housing, and the output shaft of the hydraulic cylinder passes through the circular hole and is fixedly connected to the center of the lower end of the monomer fixing guide block. Two rectangular holes are opened on one side of the housing. Guide blocks are slidably connected in the two rectangular holes. The two guide blocks are commonly fixedly connected to a rectangular plate. One side of the rectangular plate is attached to the side wall of the housing, and the other side of the rectangular plate is fixedly connected to the fixing seat of the seeding unit through bolts.

[0007] Preferably, an opening is provided on the side of the housing away from the seeding unit, and an end cover is fixedly connected to the opening through bolts. The end cover is fixedly connected to one side of the horizontal pipe.

[0008] Preferably, the transverse adjustment mechanism includes a rectangular pipe. The rectangular pipe is fixed on the towing frame. A main shaft is rotatably connected to the pipe wall of the rectangular pipe through a rolling bearing. One end of the main shaft is fixedly connected to a fixing frame. The fixing frame is fixedly connected to the center of the pipe wall of the horizontal pipe. Two arc-shaped rods are sleeved on the pipe wall of the rectangular pipe through arc-shaped holes. Both ends of the two arc-shaped rods are fixedly connected to brackets. The brackets are fixed on the pipe wall of the horizontal pipe. An arc-shaped rack is fixedly connected to the rod wall of the arc-shaped rod. A notch matched with the arc-shaped rack is provided on one side of the arc-shaped hole. A gear is meshed with one side of the arc-shaped rack. The hydraulic motor is fixed on the pipe wall of the rectangular pipe, and the output shaft of the hydraulic motor extends into the rectangular pipe and is fixedly connected to one side of the gear.

[0009] Preferably, one end of the main shaft passes through a rolling bearing and is sleeved with a fixed plate, a protrusion is provided on one side of the fixed plate, a pressure plate is sleeved on the protrusion, the pressure plate is fixed to the tube wall of the rectangular tube by bolts, a plurality of spline grooves are provided on the shaft wall of the main shaft, a plurality of spline teeth matching the spline grooves are provided on the side wall of the pressure plate, a fixing screw is sleeved on the side wall of the pressure plate through a circular mouth, and one end of the main shaft is connected to the fixing screw through a threaded hole.

[0010] Preferably, the sowing depth detection system is composed of a main control single chip microcomputer, an ultrasonic sensor measurement module, a reference panel, a hydraulic station and an electronic gyroscope. The ultrasonic sensor measurement module is composed of an ultrasonic sensor and a fixing frame. The box body of the ultrasonic sensor is installed on the fixing frame. A detection hole is opened at the bottom of the box body. The size of the detection hole enables the ultrasonic sensor probe to extend. The fixing frame is installed on the sowing unit, and the electronic gyroscope is installed on the wall of the horizontal tube.

[0011] Preferably, the reference panel is provided with a signal receiving module for receiving the signal emitted by the ultrasonic sensor, and the signal receiving module can feed back the received ultrasonic sensor signal and the electronic gyroscope signal to the main control microcontroller.

[0012] The present invention also provides a method for controlling the sowing depth of corn no-tillage sowing with synchronous monomer movement, comprising the following steps: Step 1: Move the control device to the land to be tested after the field test, and install the device on the seeder according to the instructions; Step 2: Initialize the system components, including the wireless receiving module, the corresponding I / O of the MCU, the initial position of the sowing depth control device, and the horizontal posture. Then, a sowing depth target value needs to be set for the MCU. ; Step 3: Start the seeder, and start the active sowing depth control device, the electronic gyroscope and the ultrasonic sensor; Step 4: The main controller of the main control microcontroller receives the broadcast depth collection information from the host computer through the wireless communication module , compare the host computer broadcast depth acquisition value and seeding depth target The size of the seeding depth can be used to determine the seeding depth; Step 5: The main control microcontroller sends a command to make the sowing depth control device adjust the distance to The D / A converter then It is converted into an analog signal and sent to the hydraulic solenoid valve to control the extension and contraction of the hydraulic cylinder.

[0013] Preferably, the electronic gyroscope is used to detect the yaw angular velocity of the horizontal pipe in real time. The single-chip microcomputer receives the signal output by the electronic gyroscope. According to the result of threshold judgment by the single-chip microcomputer, the control system generates corresponding control instructions, and the control instructions are transmitted to the electromagnetic directional valve, a key control component in the hydraulic system, to control the execution software of the regulating device to adjust the attitude of the seeding depth regulating device by the electromagnetic directional valve.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides a seeding depth regulating device and method for synchronous single-body movement in no-till maize seeding, having the following beneficial effects: 1. It can automatically regulate the seeding depth hydraulic active regulating device module according to the detection value of the seeding depth detection system. When the ditching depth of the ditching opener exceeds the target set value, it controls the hydraulic cylinder to extend to drive the single-body fixed guide block to move the whole seeding single body upward, reducing the ditching depth before seeding. On the contrary, it controls the hydraulic cylinder to retract to drive the single-body fixed guide block to move the whole seeding single body downward, increasing the ditching depth. The seeding depth regulating device will not affect the parallel four-bar profiling mechanism to follow the terrain profiling. The seeding depth regulating device and the four-bar profiling mechanism interact with each other to jointly ensure the stability of the ditching depth of the ditching opener and the consistency of the seeding depth.

[0015] 2. The hydraulic motor can directly drive the gear to make the arc rod swing around the main shaft. The swing of the arc rod drives the horizontal pipe to swing through the bracket. In this way, the attitudes of multiple seeding single bodies can be adjusted synchronously. On the inclined ground, the attitude of the seeding single body can be adjusted to be perpendicular to the horizontal plane first, and then the seeding depth can be independently adjusted by the longitudinal adjusting mechanism. In this way, the seeding single body can always be in a vertical state during seeding, without affecting the stable seed metering of the seed metering device of the seeding single body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a seeding depth regulating device for synchronous single-body movement in no-till maize seeding proposed by the present invention; Figure 2 is a schematic structural diagram of the frame, the horizontal adjusting mechanism and the longitudinal adjusting mechanism in a seeding depth regulating device for synchronous single-body movement in no-till maize seeding proposed by the present invention; Figure 3 is a schematic structural diagram of the horizontal adjusting mechanism in a seeding depth regulating device for synchronous single-body movement in no-till maize seeding proposed by the present invention; Figure 4 is a schematic structural diagram of the main shaft, the fixed frame, the pressure plate and the fixed disk in a seeding depth regulating device for synchronous single-body movement in no-till maize seeding proposed by the present invention; Figure 5 is an effect diagram of the horizontal adjusting mechanism in a seeding depth regulating device for synchronous single-body movement in no-till maize seeding proposed by the present invention; Figure 6 Schematic diagram of the structure of the horizontal pipe and the bracket in the seeding depth control device for the synchronous movement of a single unit in no-till corn seeding proposed by the present invention; Figure 7 Schematic diagram of the structure of the longitudinal adjustment mechanism in the seeding depth control device for the synchronous movement of a single unit in no-till corn seeding proposed by the present invention; Figure 8 Schematic diagram of the structure of the single-unit fixed guide block, guide block and rectangular plate in the seeding depth control device for the synchronous movement of a single unit in no-till corn seeding proposed by the present invention; Figure 9 Effect diagram when the seeding depth control device for the synchronous movement of a single unit in no-till corn seeding proposed by the present invention adjusts the seeding depth; Figure 10 Block diagram of the seeding depth detection system in the seeding depth control device for the synchronous movement of a single unit in no-till corn seeding proposed by the present invention.

[0017] In the figure: 1. Seeding unit; 2. Housing; 3. Profiling depth-limiting wheel; 4. Horizontal pipe; 5. Tractor frame; 6. Rectangular pipe; 7. End cover; 8. Hydraulic cylinder; 9. Hydraulic station; 10. Reference panel; 11. Hydraulic motor; 12. Arc-shaped rack; 13. Arc-shaped rod; 14. Fixed frame; 15. Pressure plate; 16. Fixed disk; 17. Fixed screw; 18. Main shaft; 19. Bracket; 20. Guide post; 21. Single-unit fixed guide block; 22. Rectangular hole; 23. Guide block; 24. Rectangular plate; 25. Electronic gyroscope; 26. Gear. Detailed implementation method

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment 1: Referring to the attached Figure 1-2 and Figures 7-9 , a seeding depth control device for the synchronous movement of a single unit in no-till corn seeding includes a seeding depth detection system, a tractor frame 5, a horizontal pipe 4, a plurality of profiling depth-limiting wheels 3, and a plurality of seeding units 1 with a mechanical parallelogram profiling structure. It also includes a longitudinal adjustment mechanism corresponding to the seeding unit 1, which is fixedly connected between the seeding unit 1 and the horizontal pipe 4 to adjust the height of the seeding unit 1 in the transverse direction at different height changes, so as to adjust the seeding depth according to the terrain; The specifically designed longitudinal adjustment mechanism includes a housing 2. A single-body fixed guide block 21 is slidably connected inside the housing 2. A plurality of guide posts 20 are sleeved on the side wall of the single-body fixed guide block 21 through guide holes. The plurality of guide posts 20 are all fixed inside the housing 2. The cooperation between the guide posts 20 and the single-body fixed block 21 can limit the moving direction of the seeding unit 1 and can provide sufficient traction stability. One side of the housing 2 is fixedly connected to one side of the cross pipe 4. A circular hole is provided at the lower end of the housing 2. A hydraulic cylinder 8 is fixed at the lower end of the housing 2. The output shaft of the hydraulic cylinder 8 passes through the circular hole and is fixedly connected to the center of the lower end of the single-body fixed guide block 21. Here, a hydraulic cylinder 8 of model FA50 - stroke 100 piston type is used to directly drive the single-body fixed guide block 21 to move up and down; Two rectangular holes 22 are provided on one side of the housing 2. Guide blocks 23 are slidably connected inside the two rectangular holes 22. The two guide blocks 23 are commonly and fixedly connected to a rectangular plate 24. One side of the rectangular plate 24 is in contact with the side wall of the housing 2. The rectangular plate 24 can be used to block the rectangular holes 22 to reduce dust from entering the housing 2 and avoid dust from causing wear between the guide posts 20 and the single-body fixed guide block 21. The other side of the rectangular plate 24 is fixedly connected to the fixing seat of the seeding unit 1 through bolts. An opening is provided on the side of the housing 2 away from the seeding unit 1, and an end cover 7 is fixedly connected to the opening through bolts. The end cover 7 is fixedly connected to one side of the cross pipe 4; The main control single-chip microcomputer is of model STM32F103RCT6, which can automatically control the depth control hydraulic active regulation device module according to the detection value of the seeding depth detection system. When the ditching depth of the ditching opener exceeds the target set value, it controls the hydraulic cylinder 8 to extend to drive the single-body fixed guide block 21 to move the entire seeding unit 1 upward to reduce the ditching depth before seeding. On the contrary, it controls the hydraulic cylinder 8 to retract to drive the single-body fixed guide block 21 to move the entire seeding unit 1 downward to increase the ditching depth. The seeding depth regulation device will not affect the parallel four-bar profiling mechanism to follow the terrain. The seeding depth regulation device and the four-bar profiling mechanism interact with each other to jointly ensure the ditching depth stability and seeding depth consistency of the ditching opener.

[0020] Figure 9 Shown is the seeding effect diagram of multiple seeding units 1 on a slope. At this time, the individually configured hydraulic cylinders 8 of the multiple seeding units 1 can be used to enable each seeding unit 1 to operate according to the preset seeding depth.

[0021] A lateral adjustment mechanism is also provided, which is installed between the cross pipe 4 and the traction frame 5 to adjust the seeding depth of the multiple seeding units 1 on a steep slope ground by adjusting the parallelism between the cross pipe 4 and the ground; The specifically set horizontal adjustment mechanism includes a rectangular pipe 6, which is fixed on the towing frame 5. A main shaft 18 is rotatably connected to the pipe wall of the rectangular pipe 6 through a rolling bearing. One end of the main shaft 18 is fixedly connected to a fixed frame 14, and the fixed frame 14 is fixedly connected to the center of the pipe wall of the horizontal pipe 4. The main shaft 18 is used to realize the movable connection between the rectangular pipe 6 and the horizontal pipe 4, so that the horizontal pipe 4 swings horizontally with the main shaft 18 as the axis. Two arc-shaped rods 13 are sleeved on the pipe wall of the rectangular pipe 6 through arc-shaped holes. Both ends of the two arc-shaped rods 13 are fixedly connected to a support 19, and the support 19 is fixed on the pipe wall of the horizontal pipe 4. The two arc-shaped rods 13 play a role in increasing the traction stability and reducing the wear between the main shaft 18 and the rolling bearing. Some rollers can be added between the arc-shaped rod 13 and the rectangular pipe 6 to reduce the friction between the arc-shaped rod 13 and the rectangular pipe, or other auxiliary lubricating components can be set. The existing technology can be adopted here, and no more details will be elaborated; An arc-shaped rack 12 is fixedly connected to the rod wall of the arc-shaped rod 13. A notch matching the arc-shaped rack 12 is arranged on one side of the arc-shaped hole. A gear 26 is meshed with one side of the arc-shaped rack 12. A hydraulic motor 11 is fixed on the pipe wall of the rectangular pipe 6. The output shaft of the hydraulic motor 11 extends into the rectangular pipe 6 and is fixedly connected to one side of the gear 26. One end of the main shaft 18 passes through the rolling bearing and is sleeved with a fixed disk 16. A protrusion is arranged on one side of the fixed disk 16, and a pressure disk 15 is sleeved on the protrusion. The pressure disk 15 is fixed on the pipe wall of the rectangular pipe 6 by bolts. Multiple spline grooves are arranged on the shaft wall of the main shaft 18. Multiple spline teeth matching the spline grooves are arranged on the side wall of the pressure disk 15. A fixing screw 17 is sleeved on the side wall of the pressure disk 15 through a round hole. One end of the main shaft 18 is connected to the fixing screw 17 through a threaded hole. The pressure disk 15 and the fixed disk 16 can play a role in positioning one end of the main shaft 18 and increasing the axial stability of the main shaft 18.

[0022] Because when sowing on an inclined ground, the towing tractor, the frame of the seeder and multiple seeding units 1 are all in an inclined state, and the frame of the traditional seeder cannot be adjusted horizontally. Therefore, in the above technical solution, the hydraulic motor 11 can directly drive the gear 26 to make the arc-shaped rod 13 swing with the main shaft 18 as the axis. When the arc-shaped rod 13 swings, the support 19 drives the horizontal pipe 4 to swing to a horizontal posture, so as to synchronously adjust the vertical postures of multiple seeding units 1. Then, on the inclined ground, first adjust the posture of the seeding unit 1 to be perpendicular to the horizontal plane, and then use the longitudinal adjustment mechanism to independently adjust the vertical position of the seeding unit 1 to adjust the seeding depth. In this way, the seeding unit 1 can always be in a vertical state during sowing, without affecting the stable seed metering of the seed metering device of the seeding unit 1. Secondly, the horizontal adjustment mechanism can be selectively turned off; The sowing depth detection system of the present technical solution controls the movement of the longitudinal adjustment mechanism through the multiple hydraulic cylinders 8, and controls the movement of the lateral adjustment mechanism through the hydraulic motor 11. The sowing depth detection system is specifically composed of a main control microcontroller, an ultrasonic sensor measurement module, a reference panel 10, a hydraulic station 9 and an electronic gyroscope 25. The ultrasonic sensor measurement module is composed of an ultrasonic sensor and a fixing frame. The box body of the ultrasonic sensor is installed on the fixing frame. A detection hole is opened at the bottom of the box body. The size of the detection hole enables the ultrasonic sensor probe to extend. The fixing frame is installed on the sowing unit 1. The electronic gyroscope 25 is installed on the wall of the horizontal tube 4. The reference panel 10 is provided with a signal receiving module for receiving the signal emitted by the ultrasonic sensor. The signal receiving module can feed back the received ultrasonic sensor signal and the signal of the electronic gyroscope 25 to the main control microcontroller. Other software and control algorithms configured in this system adopt existing technologies and will not be elaborated here.

[0023] The above method for regulating the sowing depth by using hydraulic components comprises the following steps: Step 1: Move the control device to the land to be tested after the field test, and install the device on the seeder according to the instructions; Step 2: Initialize the system components, including the wireless receiving module, the corresponding I / O of the MCU, the initial position of the sowing depth control device, and the horizontal posture. Then, a sowing depth target value needs to be set for the MCU. ; Step 3: Start the seed drill, and start the active seeding depth control device, the electronic gyroscope 25 and the ultrasonic sensor; Step 4: The main controller of the main control microcontroller receives the broadcast depth collection information from the host computer through the wireless communication module , compare the host computer broadcast depth acquisition value and seeding depth target The size of the seeding depth can be used to determine the seeding depth; Step 5: The main control microcontroller sends a command to make the sowing depth control device adjust the distance to The D / A converter then The analog signal is converted into an analog signal and sent to the hydraulic solenoid valve to control the extension and contraction of the hydraulic cylinder 8.

[0024] The electronic gyroscope 25 is used to detect the yaw angular velocity of the cross tube 4 in real time. The single chip microcomputer receives the signal output by the electronic gyroscope 25. The single chip microcomputer controls the system to generate corresponding control instructions based on the result of the threshold judgment. The control instructions are transmitted to the electromagnetic reversing valve, a key control component in the hydraulic system, and the electromagnetic reversing valve controls the execution software of the control device to adjust the posture of the sowing depth control device.

[0025] It should be noted that the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sowing depth control device for synchronous single-body movement of no-till corn seeding, comprising a seeding depth detection system, a traction frame (5), a horizontal pipe (4), a plurality of profiling depth-limiting wheels (3), and a plurality of seeding units (1) with a mechanical parallelogram profiling structure, characterized in that, It further includes: A longitudinal adjustment mechanism, fixedly connected between the seeding unit (1) and the horizontal pipe (4). The seeding depth detection system controls the movement of the longitudinal adjustment mechanism through a plurality of hydraulic cylinders (8) to adjust the height of the seeding unit (1) in the transverse direction at different heights, so as to adjust the seeding depth according to the terrain. A transverse adjustment mechanism, installed between the horizontal pipe (4) and the towing frame (5). The seeding depth detection system controls the movement of the transverse adjustment mechanism through a hydraulic motor (11) to adjust the parallelism between the horizontal pipe (4) and the ground, change the attitude of a plurality of seeding units (1) on a steep slope ground, so that the seeding unit (1) is always in a vertical state for seed metering during seeding, and does not affect the longitudinal adjustment mechanism to adjust the seeding depth.

2. The depth control device for synchronous movement of a single corn no-till seeding unit according to claim 1, characterized in that: The longitudinal adjustment mechanism includes a housing (2). A monomer fixing guide block (21) is slidably connected inside the housing (2). A plurality of guide posts (20) are sleeved on the side wall of the monomer fixing guide block (21) through guide holes. A plurality of the guide posts (20) are all fixed inside the housing (2). One side of the housing (2) is fixedly connected to one side of the horizontal pipe (4). A circular hole is provided at the lower end of the housing (2). The hydraulic cylinder (8) is fixed to the lower end of the housing (2). The output shaft of the hydraulic cylinder (8) passes through the circular hole and is fixedly connected to the center of the lower end of the monomer fixing guide block (21). Two rectangular holes (22) are opened on one side of the housing (2). Guide blocks (23) are slidably connected inside the two rectangular holes (22). The two guide blocks (23) are commonly fixedly connected to a rectangular plate (24). One side of the rectangular plate (24) is attached to the side wall of the housing (2). The other side of the rectangular plate (24) is fixedly connected to the fixing seat of the seeding unit (1) through bolts.

3. The depth control device for synchronous movement of a single unit in no-tillage maize seeding according to claim 2, characterized in that: An opening is provided on the side of the housing (2) away from the seeding unit (1), and an end cover (7) is fixedly connected to the opening through bolts. The end cover (7) is fixedly connected to one side of the horizontal pipe (4).

4. A seeding depth control device for synchronous movement of a single corn no-till seeding unit according to claim 1, characterized in that: The transverse adjustment mechanism includes a rectangular pipe (6). The rectangular pipe (6) is fixed to the towing frame (5). A main shaft (18) is rotatably connected to the pipe wall of the rectangular pipe (6) through a rolling bearing. One end of the main shaft (18) is fixedly connected to a fixing frame (14). The fixing frame (14) is fixedly connected to the center of the pipe wall of the horizontal pipe (4). Two arc-shaped rods (13) are sleeved on the pipe wall of the rectangular pipe (6) through arc-shaped holes. Both ends of the two arc-shaped rods (13) are fixedly connected to brackets (19). The brackets (19) are fixed to the pipe wall of the horizontal pipe (4). An arc-shaped rack (12) is fixedly connected to the rod wall of the arc-shaped rod (13). A notch matching the arc-shaped rack (12) is provided on one side of the arc-shaped hole. A gear (26) is engaged with one side of the arc-shaped rack (12). The hydraulic motor (11) is fixed to the pipe wall of the rectangular pipe (6). The output shaft of the hydraulic motor (11) extends into the rectangular pipe (6) and is fixedly connected to one side of the gear (26).

5. A seeding depth control device for synchronous movement of a single unit in no-till maize seeding according to claim 4, characterized in that: One end of the main shaft (18) passes through the rolling bearing and is sleeved with a fixed plate (16); a protrusion is provided on one side of the fixed plate (16); a pressure plate (15) is sleeved on the protrusion; the pressure plate (15) is fixed to the wall of the rectangular tube (6) by bolts; a plurality of spline grooves are provided on the shaft wall of the main shaft (18); a plurality of spline teeth matching the spline grooves are provided on the side wall of the pressure plate (15); a fixing screw (17) is sleeved on the side wall of the pressure plate (15) through a circular opening; and one end of the main shaft (18) is connected to the fixing screw (17) through a threaded hole.

6. A sowing depth control device for synchronous movement of a single unit for no-tillage sowing of corn according to claim 1, characterized in that: The sowing depth detection system is composed of a main control single chip computer, an ultrasonic sensor measurement module, a reference panel (10), a hydraulic station (9) and an electronic gyroscope (25); the ultrasonic sensor measurement module is composed of an ultrasonic sensor and a fixing frame; the box body of the ultrasonic sensor is mounted on the fixing frame; a detection hole is provided at the bottom of the box body; the size of the detection hole enables the ultrasonic sensor probe to extend; the fixing frame is mounted on the sowing unit (1); and the electronic gyroscope (25) is mounted on the wall of the horizontal tube (4).

7. A seeding depth control device for synchronous movement of a single corn no-tillage seeding unit according to claim 6, characterized in that: The reference panel (10) is provided with a signal receiving module for receiving the signal emitted by the ultrasonic sensor, and the signal receiving module is capable of feeding back the received ultrasonic sensor signal and the signal of the electronic gyroscope (25) to the main control microcontroller.

8. A method for a sowing depth control device for synchronous movement of a no-tillage corn seeding monomer according to any one of claims 1-7, characterized in that, The following steps are involved: Step 1: Move the control device to the land to be tested after the field test, and install the device on the seeder according to the instructions; Step 2: Initialize each part of the system, including the wireless receiving module, the corresponding I / O of the single-chip microcomputer, the initial position of the sowing depth control device, and the horizontal attitude. Then, a sowing depth target value needs to be set for the single-chip microcomputer ; Step 3: start the seed drill, and start the active seeding depth control device, the electronic gyroscope (25) and the ultrasonic sensor; Step 4: The main controller of the master single-chip microcomputer receives the sowing depth acquisition information from the host computer through the wireless communication module , compare the sowing depth acquisition value of the host computer with the sowing depth target value to judge the sowing depth situation; Step 5. The main control single-chip microcomputer sends an instruction to make the depth adjustment device adjust the distance to determined, and then the D / A converter will convert it into an analog signal and send it to the hydraulic solenoid valve to control the extension and contraction of the hydraulic cylinder (8).

9. A method for regulating seeding depth of synchronous movement of a single unit for no-tillage seeding of corn according to claim 8, characterized in that: The electronic gyroscope (25) is used to detect the yaw angular velocity of the cross tube (4) in real time. The single chip microcomputer receives a signal output by the electronic gyroscope (25). The single chip microcomputer generates a corresponding control instruction based on the result of the threshold judgment. The control instruction is transmitted to the electromagnetic reversing valve, a key control element in the hydraulic system, so that the electromagnetic reversing valve controls the execution software of the control device to adjust the posture of the sowing depth control device.

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