A sowing depth control device and method for corn no-till sowing with synchronized single-body motion

Abstract

The present invention relates to the field of seed drill control technology, and discloses a sowing depth control device for corn no-till sowing with synchronized single-body movement. The device comprises a sowing depth detection system, a traction frame, a transverse tube, multiple contoured depth-limiting wheels, and multiple sowing units with mechanical parallelepiped contouring structures. The device also comprises a longitudinal adjustment mechanism fixedly connected between the sowing units and the transverse tube. The sowing depth detection system controls the movement of the longitudinal adjustment mechanism via multiple hydraulic cylinders, adjusting the lateral height of the sowing units by varying the height, thereby adjusting the sowing depth according to the terrain. The transverse adjustment mechanism is installed between the transverse tube and the traction frame. The sowing depth control device for corn no-till sowing with synchronized single-body movement can adjust the sowing depth in multiple directions, is suitable for sowing operations on various complex terrains, and can also adjust the posture of the seeder to ensure stable seeding by the seeder.

Description

Technical Field

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

[0002] Appropriate sowing depth has a vital impact on seed germination and seedling growth. If seeds are sown too deep, they will need to expend excessive energy to break through the thick soil layer when emerging, which may make it difficult for seedlings to emerge or even rot in the soil due to energy depletion. If seeds are sown too shallowly, they may not receive sufficient water supply, making it difficult for them to take root firmly and being greatly affected by the external environment. For example, they may be easily dried out by the wind and pecked by birds, which is not conducive to the smooth germination of seeds and the subsequent healthy growth of 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 improve crop yields. Currently, there are two main types of sowing depth control: active control and passive control. Passive control mainly relies on the contouring structure and depth-limiting wheel of the sowing unit to adjust the sowing depth. It can be used to maintain the target sowing depth, but it does not achieve autonomous control. The problem that the consistency of sowing depth is easily affected by field topography remains unresolved. 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. This allows the sowing depth to 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 application, 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 problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a sowing depth control device and method for corn no-till sowing with synchronous single-body movement, 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 terrain such as slopes and gullies. In addition, the sowing equipment will tilt with the terrain due to the influence of the traction equipment, which will also affect the seed arrangement of the seeder.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a sowing depth control device for corn no-till sowing with synchronized unit motion, comprising a sowing depth detection system, a traction frame, a cross tube, a plurality of contouring depth-limiting wheels, and a plurality of sowing units with a mechanical parallelepiped contouring structure, and further comprising:

[0008] The longitudinal adjustment mechanism is fixedly connected between the sowing unit and the horizontal tube. The sowing depth detection system controls the movement of the longitudinal adjustment mechanism through multiple hydraulic cylinders, and adjusts the height of the sowing unit in the horizontal direction by different height changes, thereby adjusting the sowing depth according to the terrain.

[0009] The lateral adjustment mechanism is installed between the transverse tube and the traction frame. The sowing depth detection system controls the movement of the transverse adjustment mechanism through a hydraulic motor to adjust the parallelism between the transverse tube and the ground, thereby changing the posture of multiple sowing units on the steep slope, so that the sowing units are always in a vertical state for sowing, and do not affect the sowing depth adjustment of the longitudinal adjustment mechanism.

[0010] Preferably, the longitudinal adjustment mechanism includes a housing, a single fixed guide block is slidably connected to the housing, a plurality of guide posts are sleeved on the side wall of the single fixed guide block through a guide hole, the plurality of guide posts are fixed in the housing, one side of the housing is fixedly connected to one side of the cross tube, a circular hole is provided at the lower end of the housing, the hydraulic cylinder is fixed to the lower end of the housing, 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 single fixed guide block;

[0011] Two rectangular holes are opened on one side of the shell, and guide blocks are slidably connected in the two rectangular holes. The two guide blocks are fixedly connected to a rectangular plate. One side of the rectangular plate is fitted with the side wall of the shell, and the other side of the rectangular plate is fixedly connected to the fixing seat of the sowing unit by bolts.

[0012] Preferably, an opening is provided on a side of the shell away from the sowing unit, and an end cover is fixedly connected to the opening by bolts, and the end cover is fixedly connected to one side of the horizontal tube.

[0013] Preferably, the transverse adjustment mechanism includes a rectangular tube, the rectangular tube is fixed on the traction frame, a main shaft is rotatably connected to the tube wall of the rectangular tube 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 tube wall of the transverse tube, two arc-shaped rods are sleeved on the tube wall of the rectangular tube through an arc-shaped hole, both ends of the two arc-shaped rods are fixedly connected to a bracket, and the bracket is fixed to the tube wall of the transverse tube;

[0014] An arc-shaped rack is fixedly connected to the rod wall of the arc-shaped rod, a notch matching the arc-shaped rack is provided on one side of the arc-shaped hole, a gear is engaged with one side of the arc-shaped rack, the hydraulic motor is fixed on the tube wall of the rectangular tube, and the output shaft of the hydraulic motor extends into the rectangular tube and is fixedly connected to one side of the gear.

[0015] 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, and 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.

[0016] 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 bracket. The box body of the ultrasonic sensor is installed on the fixing bracket. A detection hole is opened at the bottom of the box body. The size of the detection hole allows the ultrasonic sensor probe to extend. The fixing bracket is installed on the sowing unit, and the electronic gyroscope is installed on the wall of the horizontal tube.

[0017] Preferably, the reference panel is provided with a signal receiving module for receiving the signal transmitted 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.

[0018] The present invention also provides a method for controlling the sowing depth of corn no-till sowing with synchronized monomer movement, comprising the following steps:

[0019] Step 1: Move the control device to the land to be tested after the field test and install the device on the seed drill according to the instructions;

[0020] 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, set a sowing depth target value for the MCU. ;

[0021] Step 3: Start the seed drill and activate the active seeding depth control device, electronic gyroscope and ultrasonic sensor;

[0022] Step 4: The main controller of the main control microcontroller receives the broadcast depth acquisition information from the host computer through the wireless communication module , compare the host computer broadcast depth acquisition value and seeding depth target value The size of the sapling is used to determine the sowing depth;

[0023] 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 converts It is converted into an analog signal and sent to the hydraulic solenoid valve to control the extension and contraction of the hydraulic cylinder.

[0024] Preferably, the electronic gyroscope is used to detect the yaw angular velocity of the cross tube in real time, and the single-chip microcomputer receives the signal output by the electronic gyroscope. The single-chip microcomputer generates corresponding control instructions based on the result of the threshold judgment, and the control system generates corresponding control instructions. 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] (3) Beneficial effects

[0026] Compared with the prior art, the present invention provides a device and method for controlling the sowing depth of corn no-till sowing with synchronized single-body motion, which has the following beneficial effects:

[0027] 1. The sowing depth active hydraulic control device module can be automatically controlled according to the detection value of the sowing depth detection system. When the furrowing depth of the furrow opener exceeds the target set value, the hydraulic cylinder is controlled to extend and drive the single fixed guide block to move the entire sowing unit upward, reducing the furrowing depth before sowing. Conversely, the hydraulic cylinder is controlled to retract and drive the single fixed guide block to move the entire sowing unit downward, increasing the furrowing depth. The sowing depth control device will not affect the parallel four-bar profiling mechanism to follow the terrain profiling. The sowing depth control device and the four-bar profiling mechanism interact with each other to ensure the furrowing depth stability and sowing depth consistency of the furrow opener.

[0028] 2. The hydraulic motor can directly drive the gear to make the arc rod swing with the main shaft as the axis. The swing of the arc rod drives the horizontal tube to swing using the bracket, so that the postures of multiple sowing units can be adjusted synchronously. It can be achieved on the inclined ground. First, the posture of the sowing unit is adjusted to be perpendicular to the horizontal plane, and then the sowing depth is independently adjusted using the longitudinal adjustment mechanism. In this way, the sowing unit can always be in a vertical state during sowing, without affecting the stable seeding of the sowing unit's seed metering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural schematic diagram of a sowing depth control device for corn no-till sowing with synchronous single-body motion proposed by the present invention;

[0030] Figure 2 This is a structural diagram of the frame, lateral adjustment mechanism and longitudinal adjustment mechanism in a sowing depth control device with synchronous single-body motion for corn no-till sowing proposed by the present invention;

[0031] Figure 3 This is a structural schematic diagram of the lateral adjustment mechanism in a sowing depth control device for corn no-till sowing with synchronous single-body motion proposed by the present invention;

[0032] Figure 4 This is a structural diagram of the main shaft, fixing frame, pressure plate and fixed plate of a sowing depth control device with synchronous single-body motion for corn no-till sowing proposed by the present invention;

[0033] Figure 5 This is a rendering of the lateral adjustment mechanism in the sowing depth control device for corn no-till sowing with synchronous single-body motion proposed by the present invention;

[0034] Figure 6 This is a schematic structural diagram of a transverse tube and a bracket in a sowing depth control device with synchronous single-body motion for corn no-till sowing proposed by the present invention;

[0035] Figure 7 This is a structural schematic diagram of the longitudinal adjustment mechanism in a sowing depth control device for corn no-till sowing with synchronous single-body motion proposed by the present invention;

[0036] Figure 8 This is a structural diagram of a single fixed guide block, a guide block and a rectangular plate in a sowing depth control device with synchronous single movement for corn no-till sowing proposed by the present invention;

[0037] Figure 9 This is a diagram showing the effect of the sowing depth control device for corn no-till sowing with synchronous single-body motion proposed by the present invention when controlling the sowing depth;

[0038] Figure 10 This is a block diagram of the sowing depth detection system in the sowing depth control device with synchronous single-body motion for corn no-till sowing proposed by the present invention.

[0039] In the figure: 1. sowing unit; 2. shell; 3. contoured depth-limiting wheel; 4. cross tube; 5. traction frame; 6. rectangular tube; 7. end cover; 8. hydraulic cylinder; 9. hydraulic station; 10. reference panel; 11. hydraulic motor; 12. arc-shaped rack; 13. arc-shaped rod; 14. fixing frame; 15. pressure plate; 16. fixing plate; 17. fixing screw; 18. main shaft; 19. bracket; 20. guide column; 21. unit fixed guide block; 22. rectangular hole; 23. guide block; 24. rectangular plate; 25. electronic gyroscope; 26. gear. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 efforts are within the scope of protection of the present invention.

[0041] Example 1:

[0042] Refer to the attached Figure 1-2 and Figure 7-9A sowing depth control device for corn no-till sowing with synchronized single-body movement, comprising a sowing depth detection system, a traction frame 5, a transverse tube 4, a plurality of contoured depth-limiting wheels 3, and a plurality of sowing units 1 with a mechanical parallelepiped contouring structure, further comprising a longitudinal adjustment mechanism corresponding to the sowing units 1, which is fixedly connected between the sowing units 1 and the transverse tube 4 and adjusts the lateral height of the sowing units 1 by varying the height, thereby adjusting the sowing depth according to the terrain;

[0043] The specifically designed longitudinal adjustment mechanism includes a shell 2, in which a single fixed guide block 21 is slidably connected, and a plurality of guide posts 20 are sleeved on the side walls of the single fixed guide block 21 through guide holes. The multiple guide posts 20 are all fixed in the shell 2. The guide posts 20 cooperate with the single fixed block 21 to limit the moving direction of the sowing unit 1 and provide sufficient traction stability. One side of the shell 2 is fixedly connected to one side of the cross tube 4. A circular hole is provided at the lower end of the shell 2. The hydraulic cylinder 8 is fixed to the lower end of the shell 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 fixed guide block 21. Here, the piston-type hydraulic cylinder 8 with model FA50-stroke 100 is used to directly drive the single fixed guide block 21 to move up and down;

[0044] One side of the shell 2 is provided with two rectangular holes 22, and guide blocks 23 are slidably connected in the two rectangular holes 22. The two guide blocks 23 are fixedly connected to a rectangular plate 24. One side of the rectangular plate 24 is fitted with the side wall of the shell 2. The rectangular plate 24 can be used to block the rectangular holes 22, thereby reducing the entry of dust into the shell 2 and preventing dust from causing wear between the guide column 20 and the monomer fixed guide block 21. The other side of the rectangular plate 24 is fixedly connected to the fixing seat of the sowing monomer 1 by bolts. An opening is provided on the side of the shell 2 away from the sowing monomer 1, and the opening is fixedly connected to an end cover 7 by bolts. The end cover 7 is fixedly connected to one side of the cross tube 4;

[0045] The main control microcontroller model is STM32F103RCT6, which can control the automatic regulation of the sowing depth hydraulic active control device module according to the detection value of the sowing depth detection system. When the furrowing depth of the furrow opener exceeds the target set value, the hydraulic cylinder 8 is controlled to extend and drive the single fixed guide block 21 to move the entire sowing unit 1 upward, reducing the furrowing depth before sowing. Conversely, the hydraulic cylinder 8 is controlled to retract and drive the single fixed guide block 21 to move the entire sowing unit 1 downward, increasing the furrowing depth. The sowing depth control device will not affect the parallel four-bar profiling mechanism to follow the terrain profiling. The sowing depth control device and the four-bar profiling mechanism interact with each other to jointly ensure the furrowing depth stability and sowing depth consistency of the furrow opener.

[0046] Figure 9The diagram shows the sowing effect of multiple sowing units 1 on a slope. In this case, the hydraulic cylinders 8 configured separately for the multiple sowing units 1 can be used to enable each sowing unit 1 to operate according to a preset sowing depth.

[0047] A lateral adjustment mechanism is also provided, which is installed between the transverse tube 4 and the traction frame 5, and the sowing depth of multiple sowing units 1 on the steep slope is adjusted by adjusting the parallelism between the transverse tube 4 and the ground;

[0048] The specifically provided transverse adjustment mechanism includes a rectangular tube 6, which is fixed to the traction frame 5, and a main shaft 18 is rotatably connected to the tube wall of the rectangular tube 6 through a rolling bearing. One end of the main shaft 18 is fixedly connected to a fixing frame 14, and the fixing frame 14 is fixedly connected to the tube wall center of the cross tube 4. The main shaft 18 is used to realize the movable connection between the rectangular tube 6 and the cross tube 4, so that the cross tube 4 can swing in the transverse direction with the main shaft 18 as the axis. Two arc rods 13 are sleeved on the tube wall of the rectangular tube 6 through an arc hole, and both ends of the two arc rods 13 are fixedly connected to a bracket 19, which is fixed to the tube wall of the cross tube 4. The two arc rods 13 play a role in increasing the stability of traction and reducing the wear between the main shaft 18 and the rolling bearing. Some rollers can be added between the arc rod 13 and the rectangular tube 6 to reduce the friction between the arc rod 13 and the rectangular tube, or other auxiliary lubrication components can be set. The existing technology can be used here and will not be described in detail.

[0049] The arc-shaped rack 12 is fixedly connected to the rod wall of the arc-shaped rod 13, and a notch is provided on one side of the arc-shaped hole to match the arc-shaped rack 12. A gear 26 is meshed on one side of the arc-shaped rack 12. The hydraulic motor 11 is fixed to the wall of the rectangular tube 6. The output shaft of the hydraulic motor 11 extends into the rectangular tube 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 plate 16. A protrusion is provided on one side of the fixed plate 16, and the protrusion is sleeved. There is a pressure plate 15, which 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, and a plurality of spline teeth are provided on the side wall of the pressure plate 15 that match the spline grooves. The side wall of the pressure plate 15 is sleeved with a fixing screw 17 through a circular mouth, and one end of the main shaft 18 is connected to the fixing screw 17 through a threaded hole. The pressure plate 15 and the fixed plate 16 can be used to position one end of the main shaft 18, thereby increasing the axial stability of the main shaft 18.

[0050] Because when sowing on an inclined ground, the tractor, the frame of the seeder and the multiple sowing units 1 are all in an inclined state, and the frame of a traditional seeder cannot be adjusted to the level. Therefore, the above technical solution uses the hydraulic motor 11 to directly drive the gear 26 to make the arc rod 13 swing with the main shaft 18 as the axis. The swing of the arc rod 13 drives the cross tube 4 to swing to a posture parallel to the horizontal plane using the bracket 19, thereby achieving synchronous adjustment of the vertical postures of multiple sowing units 1. Then, on the inclined ground, the posture of the sowing unit 1 is first adjusted to be perpendicular to the horizontal plane, and then the vertical position of the sowing unit 1 is adjusted by the longitudinal adjustment mechanism to independently adjust the sowing depth. In this way, the sowing unit 1 can always be in a vertical state during sowing, without affecting the stable seeding of the seed meter of the sowing unit 1. Secondly, the lateral adjustment mechanism can be selectively closed.

[0051] 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 can enable 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. The other software and control algorithms configured in this system adopt existing technologies and will not be elaborated here.

[0052] The above method for regulating the sowing depth using hydraulic components includes the following steps:

[0053] Step 1: Move the control device to the land to be tested after the field test and install the device on the planter according to the instructions;

[0054] 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, set a sowing depth target value for the MCU. ;

[0055] Step 3: Start the seed drill and activate the active seeding depth control device, the electronic gyroscope 25 and the ultrasonic sensor;

[0056] Step 4: The main controller of the main control microcontroller receives the broadcast depth acquisition information from the host computer through the wireless communication module , compare the host computer broadcast depth acquisition value and seeding depth target value The size of the sapling is used to determine the sowing depth;

[0057] 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 converts It is converted into an analog signal and sent to the hydraulic solenoid valve to control the extension and contraction of the hydraulic cylinder 8.

[0058] 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. Based on the result of the threshold judgment, the single-chip microcomputer generates corresponding control instructions for the control system. The control instructions are transmitted to the electromagnetic reversing valve, a key control component in the hydraulic system. The electromagnetic reversing valve controls the execution software of the control device to adjust the posture of the sowing depth control device.

[0059] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0060] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sowing depth control device for corn no-till sowing with synchronous single-body motion, comprising a sowing depth detection system, a traction frame (5), a transverse tube (4), a plurality of contoured depth-limiting wheels (3), and a plurality of sowing units (1) with a mechanical parallelepiped contouring structure, characterized in that: Also includes: A longitudinal adjustment mechanism is fixedly connected between the sowing unit (1) and the transverse tube (4); the sowing depth detection system controls the movement of the longitudinal adjustment mechanism through a plurality of hydraulic cylinders (8) provided, thereby adjusting the height of the sowing unit (1) in the transverse direction with different height changes, thereby achieving adjustment of the sowing depth according to the terrain; A transverse adjustment mechanism is installed between the transverse tube (4) and the traction frame (5). The sowing depth detection system controls the transverse adjustment mechanism to move and adjust the parallelism between the transverse tube (4) and the ground through the hydraulic motor (11) provided, thereby changing the posture of the plurality of sowing units (1) on the steep slope ground, so that the sowing units (1) are always in a vertical state for sowing, and do not affect the longitudinal adjustment mechanism to adjust the sowing depth. The transverse adjustment mechanism includes a rectangular tube (6), the rectangular tube (6) is fixed on the traction frame (5), a main shaft (18) is rotatably connected to the tube wall of the rectangular tube (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 tube wall of the transverse tube (4), two arc rods (13) are sleeved on the tube wall of the rectangular tube (6) through an arc hole, and both ends of the two arc rods (13) are fixedly connected to a bracket (19), and the bracket (19) is fixed to the tube wall of the transverse tube (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 meshed with one side of the arc-shaped rack (12), the hydraulic motor (11) is fixed to the tube wall of the rectangular tube (6), and the output shaft of the hydraulic motor (11) extends into the rectangular tube (6) and is fixedly connected to one side of the gear (26).

2. The sowing depth control device for corn no-tillage sowing with synchronous single-body motion according to claim 1, characterized in that: The longitudinal adjustment mechanism comprises a housing (2), a single fixed guide block (21) is slidably connected in the housing (2), a plurality of guide posts (20) are sleeved on the side wall of the single fixed guide block (21) through a guide hole, the plurality of guide posts (20) are fixed in the housing (2), one side of the housing (2) is fixedly connected to one side of the transverse tube (4), a circular hole is provided at the lower end of the housing (2), the 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 fixed guide block (21); Two rectangular holes (22) are provided on one side of the housing (2), and guide blocks (23) are slidably connected in the two rectangular holes (22). The two guide blocks (23) are 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), and the other side of the rectangular plate (24) is fixedly connected to the fixing seat of the sowing unit (1) via bolts.

3. The sowing depth control device for corn no-tillage sowing with synchronous single-body motion according to claim 2, characterized in that: An opening is provided on a side of the housing (2) away from the sowing unit (1), and an end cover (7) is fixedly connected to the opening via bolts, and the end cover (7) is fixedly connected to one side of the transverse tube (4).

4. The sowing depth control device for corn no-tillage sowing with synchronous single-body motion according to claim 1, 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. One end of the main shaft (18) is connected to the fixing screw (17) through a threaded hole.

5. The sowing depth control device for corn no-tillage sowing with synchronous single-body motion according to claim 1, characterized in that: The sowing depth detection system is composed of a main control single chip microcomputer, 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 provided at the bottom of the box body. The size of the detection hole is such that the ultrasonic sensor probe can be extended. The fixing frame is installed on the sowing unit (1). The electronic gyroscope (25) is installed on the wall of the horizontal tube (4).

6. The sowing depth control device for corn no-tillage sowing with synchronous single-body motion according to claim 5, characterized in that: The reference panel (10) is provided with a signal receiving module for receiving the signal transmitted 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.

7. A method for using the sowing depth control device for synchronous single-body movement of corn no-till sowing according to any one of claims 1 to 6, 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 seed drill 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, set a sowing depth target value 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 acquisition information from the host computer through the wireless communication module , compare the host computer broadcast depth acquisition value and seeding depth target value The size of the sapling is used to determine the sowing 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 converts 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).

8. The method of the sowing depth control device with synchronous single-body motion for corn no-till sowing according to claim 7, 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 the 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, and 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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