Intelligent wheat seeding machine spiral seed metering device

Abstract

The utility model relates to a kind of spiral seed metering device of intelligent wheat seeding machine in the technical field of agricultural seeding machine, including conveying shell, spiral conveying shaft, conveying motor;The front end of conveying shell is provided with feed inlet above, the rear end of conveying shell, below is provided with seed metering device, feed inlet top is connected to the bottom end outlet of seed bin by ladder-type hopper, seed metering device below is connected to the inlet of leg of plough by flow guide pipe;The head and tail ends of spiral conveying shaft are respectively from the front and rear ends of conveying shell correspondingly extended, the head of spiral conveying shaft is equipped with driven wheel, and the output shaft of conveying motor is equipped with driving wheel;The spiral seed metering device is inducted speed signal by encoder+Beidou GPS, upload to single-chip microcontroller by Q value calculation model control seed metering device rotating speed fast or slow, realizes quantitative seeding, and seed metering device and seeding machine can be synchronous also can be asynchronous, as the core component of seeding machine, by the three-dimensional collaborative technology of "material-structure-algorithm", the breakthrough improvement of seeding precision and efficiency is realized.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural seeding technology, specifically relating to a spiral seed metering device for a smart wheat seeder. Background Technology

[0002] In agricultural production, the quality of wheat sowing is one of the key factors in ensuring high wheat yields. During sowing, wheat seeds vary in moisture content, seed size, and plumpness, resulting in differences in mass per unit volume and density. Traditional seeders suffer from problems such as high labor intensity, poor sowing uniformity, high seed breakage rate, easy clogging, and difficulty in seed cleaning. With the increasing demand for smart agriculture, traditional seeders can no longer meet the requirements of precision planting for crops. Intelligent seed metering technology has become a key breakthrough, significantly improving the precise control of sowing rate. Research shows that a new type of seed metering device, based on the integrated design of sensors, dynamic control algorithms, and precision machinery, can significantly optimize sowing performance.

[0003] Due to variations in soil fertility, geology, and climate across different regions, people adjust their sowing rates based on local conditions when planting wheat. However, traditional mechanical seed metering devices have a high error rate (generally exceeding 5%). For example, the electric seeding drills and quantitative seeding drills disclosed in patent documents CN200720141540.7 and CN97232535.2 still use a chain-driven synchronous transmission between the seed metering device and the main shaft of the seeding drill's press wheel to quantitatively sow seeds from the seed bin through the seed metering device. Furthermore, the sowing rate is adjusted manually by changing the length of the grooved wheel of the seed metering device, resulting in significant errors.

[0004] Because field surfaces cannot be perfectly flat, the rollers of the seeder inevitably experience bumps, leading to unstable rotation speed. The seeder's speed varies during operation, sometimes fast and sometimes slow, a constantly changing, non-linear velocity. This can cause instability in the seed metering mechanism, resulting in inaccurate seed distribution. Furthermore, the seeder's seed drill legs often become clogged with soil during actual sowing, sometimes even completely blocked, causing missed seeds. For wheat cultivation, uneven seeding and inconsistent seedling emergence will inevitably affect crop growth and ultimately reduce grain yield. Utility Model Content

[0005] In response to the above situation, in order to ensure the uniformity of sowing during the movement of agricultural machinery at different speeds, this utility model provides a smart wheat seeder spiral seed metering device, which can prevent large or small drift during wheat sowing and ensure the accuracy of wheat sowing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A smart wheat seeder spiral seed metering device includes a seed bin for storing a large amount of wheat seeds, seeders for inserting into the soil and delivering the seeds, and a seed metering device connected between the seed bin and the seeders for quantitatively delivering the seeds from the seed bin to the seeders as required.

[0008] The seed metering device is a screw conveyor structure, including a cylindrical conveying housing and a rotatable, coaxially inserted screw conveying shaft inside the conveying housing, as well as a conveying motor for driving the screw conveying shaft to rotate. A feed inlet is located above the front end of the conveying housing, and a seed discharge port is located at the rear end or bottom of the conveying housing. The feed inlet is connected to the outlet of the seed bin via a trapezoidal hopper above it, and the seed discharge port is connected to the inlet of the seed drill leg via a guide pipe below it. The head and tail ends of the screw conveying shaft extend from the front and rear ends of the conveying housing respectively. A driven wheel is installed at the head of the screw conveying shaft, and a driving wheel is installed on the output shaft of the conveying motor. The driving wheel and the driven wheel are connected by a transmission mechanism.

[0009] Preferably, the tail end of the spiral conveying shaft is connected to a steel wire rope, and a wire hole is provided on the upper side wall of the seed drill leg. The tail end of the steel wire rope is inserted into the bottom of the inner side of the seed drill leg through the wire hole. As the spiral conveying shaft rotates, it can drive the tail end of the steel wire rope to spiral and swing inside the seed drill leg, thereby playing the role of twisting and unblocking and preventing blockage.

[0010] Preferably, the head end of the wire rope is fixedly connected to the tail end of the screw conveyor shaft via a coupling, and the tail end of the wire rope is also provided with a T-shaped end, which can better vibrate, push, and clean the inner wall of the drill leg, thereby achieving an anti-clogging effect.

[0011] Preferably, the trapezoidal hopper is a square funnel-shaped structure that is larger at the top and smaller at the bottom, and the front side wall of the trapezoidal hopper is set vertically, while the other three side walls are set at an inclined angle of ≥60°, which plays a guiding and diverting role for wheat seeds.

[0012] Preferably, the guide tube is a bent tubular structure with a vertical front section and an inclined rear section, and the bending angle between the axis of the inclined section and the axis of the vertical section of the guide tube is an obtuse angle of 100° to 150°.

[0013] Preferably, the two ends of the spiral conveyor shaft are rotatably connected to the two ends of the conveyor housing via bearings.

[0014] Preferably, the transmission method between the driving wheel and the driven wheel can adopt a transmission structure such as direct connection, gear connection or belt connection.

[0015] Preferably, the conveyor motor is a permanent magnet synchronous motor, and an encoder is located on the outside of the conveyor motor. It is connected to a host computer via bus control and feedback.

[0016] Preferably, the seeder is equipped with a host computer touch screen (containing a microcontroller), and the touch screen (microcontroller) receives the encoder speed signal installed on the press wheel.

[0017] Preferably, the touch screen (microcontroller) on the seeder has a Q value that represents the ratio of the speed of the conveyor motor to the speed of the encoder on the press wheel. Essentially, it dynamically controls the seeding amount by adjusting the matching relationship between the speed of the conveyor motor and the speed of the agricultural machinery, so as to achieve precise sowing.

[0018] Preferably, the seeder is also equipped with a voice control module, and the 4G module is used to realize the automatic control, voice control and remote control of the seeder, and upload data to the cloud.

[0019] This utility model also includes other components that enable its normal use, all of which are conventional means in the field. In addition, devices or components not limited in this utility model, such as: seeders and their seed drill legs and seed bins, permanent magnet synchronous motors, encoders, Beidou GPS modules, weighing modules, high-speed counting modules, microwave Doppler sensor modules, voice modules, touch screens and microcontrollers and their internal circuit settings, etc., all adopt existing technologies in the field.

[0020] The beneficial effects of this utility model are as follows:

[0021] The specific structural design of the trapezoidal bucket and guide pipe effectively reduces seed clogging; the steel wire rope anti-clogging mechanism solves the problem of soil clogging on the seed drill legs; and the matching and control of the seed metering speed and the seeder speed improves the uniformity of sowing.

[0022] The encoder provides high-frequency speed signals but is susceptible to slippage. GPS + Beidou positioning provides accurate position and speed information but has a lower frequency. By correcting the speed value through algorithms, errors caused by slippage and other factors are eliminated, improving the accuracy of speed measurement. It can support high-speed operation of 4-12 km / h, adapt to the requirements of large-scale planting in large farms, reduce the number of times agricultural machinery enters the field, protect soil structure, and reduce the cost of sowing operations.

[0023] By connecting to the IoT platform via CAN bus and 4G module, it supports remote monitoring and data traceability, which helps to expand precision agriculture, provides underlying hardware support for smart farms, and can also be switched to be applied to multiple crops such as rice and soybeans, as well as fertilizer sowing operations, with good scalability and compatibility. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the spiral seed metering device for the intelligent wheat seeder in this utility model.

[0025] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the trapezoidal bucket along the AA direction.

[0026] Figure 3 for Figure 1 A schematic cross-sectional view of the central guide tube along the BB direction.

[0027] Figure 4 for Figure 1 A cross-sectional view of the middle cog and wire rope along the CC direction. Detailed Implementation

[0028] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0029] It should be noted that the terms "upper," "lower," "front," "back," "inner," and "outer," which indicate direction or positional relationship, are based on the attached drawings and are used only for ease of description.

[0030] Example

[0031] like Figure 1-4 As shown, a smart wheat seeder spiral seed metering device includes a seed bin 1, seed drill legs 2, and a seed metering device, all of which are conventional settings for seeders. The key difference lies in the fact that the seed metering device described in this invention is a spiral conveyor structure, including a cylindrical conveyor housing 3 made of steel or aluminum. Its inner wall is embedded with a high-molecular self-lubricating material (friction coefficient <0.08) that possesses both wear-resistant and corrosion-resistant properties, minimizing the friction coefficient between the wheat seeds and the inner wall of the conveyor housing. A spiral conveying shaft 4 is rotatably mounted coaxially at both ends of the conveyor housing via bearings.

[0032] The screw conveyor shaft adopts an integrated screw design. The outer diameter of the screw is determined by considering factors such as processing and manufacturing, existing materials, seed flow rate and maximum sowing amount per acre, and the maximum speed of the vehicle when working in the field. The outer diameter of the screw is D=35mm.

[0033] The inner diameter of the spiral is determined by considering factors such as friction, stress, torque, matching of miniature bearings, and connection of the motor. The value is d=10mm.

[0034] The screw pitch is determined as follows: the pitch ranges from 0.8 to 1.2 times the screw diameter, and is set at 20 mm. It features strong self-locking capability, stable, uniform, and efficient filling, and prevents material (seeds) from easily spilling from the discharge port under vibration.

[0035] Screw length determination: Screw length is 150mm, helix length is 100mm; considering material inlet length, material outlet area, conveying, friction, thrust, and efficiency.

[0036] Spiral blade thickness: 2mm. The thicker the blade, the larger the duty cycle, and the more pulsating the material will be at the discharge port. The edge of the blade should have a small chamfer to form an arc, which is used to reduce the phenomenon of material getting stuck between the seed and the tube wall during the spiral pushing process. The chamfer arc value is generally 0.8 to 1.0 times the spiral pitch / diameter.

[0037] Calculation of seed output per revolution of the spiral:

[0038] outer diameter of the helix D = 35 mm = 0.035 m; inner diameter d = 10 mm = 0.01 m;

[0039] Blade thickness t = 2mm = 0.002m; Pitch P = 20mm = 0.02m; Cross-sectional area A = π / 4 * (D² - d²) = (0.035² - 0.01²) ≈ 0.000883㎡. Effective volume: V 理论 =AP=0.000883x(0.02-0.002)=0.00015894m³=0.015894L(liter).

[0040] The filling coefficient ψ = 0.4; then V 排 =V 理论 *ψ=0.15894x0.4=0.0063576 liters.

[0041] The bulk density of wheat is not a fixed value, therefore: m = V 排* ρ 麦；

[0042] ρ 麦 When the concentration is 700 g / L, m1 = 0.0063576 x 700 = 4.44936 g ≈ 4.45 g;

[0043] ρ 麦 When the concentration is 750 g / L, m2 = 0.0063576 x 750 = 4.7682 g ≈ 4.768 g;

[0044] ρ 麦 When the concentration is 800 g / L, m3 = 0.0063576 x 800 = 5.08608 g ≈ 5.086 g.

[0045] The mass flow rate of seed dispensing is related to the bulk density of wheat seeds: the bulk density of wheat ρ 麦 The larger the diameter, the greater the mass of wheat seeds discharged per revolution of the seed metering device.

[0046] Verification and analysis of the correctness of the definition of Q value:

[0047] Theoretical definition of Q value:

[0048] According to the design requirements, the Q value is defined as Q=Z. 电机 / Z 编码器 .

[0049] Physical meaning:

[0050] The Q value represents the ratio of the motor speed to the encoder speed. Essentially, it is achieved by adjusting the matching relationship between the motor speed and the agricultural machinery travel speed to dynamically control the seeding amount, thereby achieving the purpose of precise sowing.

[0051] Derivation of the mathematical model for Q-value:

[0052] 1. Seeding quantity requirement formula: Q 总 =X*vW / 666.67;

[0053] In the formula: X is the target seeding rate per mu (kg / mu); the total seeding width of the seeder is W (m); the vehicle speed is v (m / s); and 666.67 is the conversion factor from mu to square meters.

[0054] 2. Seed dispensing rate relationship of a single seeder:

[0055] Seed discharge rate Q per revolution of single seeder 转 (g / revolution), number of seeders N, then

[0056] Q 总 =Q 转 *N* Z 电机 / 1000(kg / s).

[0057] 3. Solving for Q using the combined equations: Combining the two formulas above, and through algebraic transformations, we finally obtain the expression for the Q value: Q = Z 电机 / Z 编码器 =1000*X*W / 666.67*Q 转 * N*60;

[0058] Conclusion: The mathematical definition of Q value is directly related to the seeding rate and mechanical parameters, and the derivation process is correct.

[0059] Practical application verification of Q value:

[0060] Parameter substitution verification:

[0061] Assume X = 30 kg / mu, W = 2.31 m, N = 12, Q 转 =5.086 g / revolution (ρ) 麦 =800g / L)

[0062] Q= (1000×30×2.31) / (666.67×35.86×12×12×60) = (69300) / (2812814.06) < 1;

[0063] Results analysis: Q value < 1, meeting design requirements. (Motor speed and encoder speed are asynchronous)

[0064] The range of Q values ​​under critical speed constraints:

[0065] The critical speed of the screw is Nc = 160 rpm, and the safe speed is 0.8Nc = 128 rpm.

[0066] If the vehicle speed v = 7.68 km / h, the corresponding encoder speed Z 编码器 =128 revolutions per minute

[0067] At this point: Q = Z 电机 / Z 编码器 =(128 rpm) / (128 rpm)=1 (Motor speed is synchronized with encoder speed)

[0068] Conclusion: At rated full speed, the Q value is still 1, which is within the limit.

[0069] The relationship between seeding rate X (kg / mu) and locomotive speed U (km / h).

[0070] At the critical speed, the actual seed discharge rate of the spiral seed metering device per hour is:

[0071] Q1 = m1 × 120 rpm × 60 min = 4.7682 g × 120 rpm × 60 min = 34331.04 g / h ≈ 34.331 kg / h

[0072] Q2 = m2 x 120 rpm x 60 min = 4.9589 g x 120 rpm x 60 min = 35704.08 g / h ≈ 35.704 kg / h;

[0073] Sowing area per hour of locomotive travel: S = sowing width × v 车

[0074] Assuming the seeder has 12 furrow openers, the distance between adjacent furrow openers is 21cm = 0.21m.

[0075] S = (12-1) × spacing × v 车 =(12-1)×0.21×v 车 =2.31 v 车 (㎡)

[0076] Number of acres sown per hour:

[0077] S=2.31 v车 ×1000 / 666.67=3.465 v 车 (mu)

[0078] Total mass of seeds sown by the seeder per hour

[0079] Q 总1 =Q1×12=34.331 kg / hour×12=411.972 kg. (ρ) 麦 =750g / L)

[0080] Q 总2 =Q² × 12 = 35.704 kg / hour × 12 = 428.448 kg. (ρ) 麦 =780g / L)

[0081] Then: X1 = Total seeding quantity Q 总1 / Sowing area S1 = 411.972 / 3.465 v 车 =118.9 / v 车 (kg)

[0082] X2 = Total seeding volume Q 总2 / Sowing area S2 = 428.448 / 3.465 v 车 =123.65 / v 车 (kg)

[0083] Note: The maximum speed of the locomotive is related to the bulk density of the seeds and the sowing rate per acre. When the bulk density of the seeds is constant, the higher the sowing rate per acre, the slower the locomotive will be. Conversely, the lower the sowing rate per acre, the faster the locomotive can travel.

[0084] For example: the bulk density of wheat seeds is ρ 麦 When the concentration is 750g / L, the sowing rate is 10-20kg per mu (unit of land area).

[0085] Because X1 = 118.9 / v 车 Therefore: v1 = 118.9 / 10 = 11.89 km / h; v2 = 118.9 / 20 = 6.94 km / h.

[0086] bulk density of wheat seeds ρ 麦 When the concentration is 780g / L, the sowing rate is 10-20kg per mu (unit of land area).

[0087] Since X2 = 123.65 / v 车 Therefore, v1 = 123.65 / 10 ≈ 12.4 km / h; v2 = 123.65 / 20 ≈ 6.2 km / h.

[0088] Conclusion: Through reasoning, the locomotive's speed and seeding rate, at different values, fully meet the technical requirements of agricultural machinery for wheat sowing.

[0089] In terms of nonlinear speed response, material output continuity, and stability, the surface of the screw conveyor shaft is treated with micro-arc oxidation and diamond-like carbon coating processes, with a surface roughness Ra≤0.2um, ensuring that the seed breakage rate during wheat sowing is <0.8%.

[0090] A conveyor motor 5 is connected to one end of a spiral conveyor shaft. The head and tail ends of the spiral conveyor shaft extend from the front and rear ends of the conveyor housing, respectively. A driven pulley 7 is mounted on the head of the spiral conveyor shaft, and a driving pulley 8 is mounted on the output shaft of the conveyor motor. The driving pulley and the driven pulley are connected by a transmission belt 9. The transmission belt is a synchronous belt, and both the driving pulley and the driven pulley are synchronous pulleys, enabling precise transmission of the conveyor motor's output torque to the spiral conveyor shaft. The conveyor motor is a PMSM (Permanent Magnet Synchronous Motor) and is equipped with an encoder 6 to achieve closed-loop control of the conveyor motor, with a torque control accuracy of ±0.5 Nm and a response time of <50 ms.

[0091] The front end of the conveying housing is provided with a feed inlet, and the rear end of the conveying housing is provided with a seed discharge port. The feed inlet is connected to the outlet of the seed bin via a trapezoidal hopper 10, and the seed discharge port is connected to the inlet of the seed drill leg via a guide pipe 11.

[0092] The tail end of the spiral conveying shaft is connected to a steel wire rope 12, and a wire hole 13 is provided on the upper side wall of the seed drill leg. The tail end of the steel wire rope is inserted into the bottom of the inner side of the seed drill leg through the wire hole. As the spiral conveying shaft rotates, it can drive the tail end of the steel wire rope to spiral and swing inside the seed drill leg, thereby playing the role of churning and unblocking and preventing blockage inside the seed drill leg.

[0093] The head end of the wire rope is fixedly connected to the tail end of the screw conveyor shaft via a coupling 14, and the tail end of the wire rope is also provided with a T-shaped end 15, which can better clean and push the inner wall of the drill leg.

[0094] The trapezoidal hopper is a square funnel-shaped structure that is larger at the top and smaller at the bottom. The front side wall of the trapezoidal hopper is vertical, while the other three side walls are inclined trapezoidal feed inlets with an inclination angle of 60°. This helps to reduce material sticking to the wall and guides the wheat seeds. Experiments have shown that the trapezoidal feed inlet can better solve the problems of material jamming and seed blockage than the straight feed inlet.

[0095] The diversion pipe is a bent tubular structure with a vertical front section and an inclined rear section, and the bending angle between the axis of the inclined section of the diversion pipe and the axis of the vertical section is an obtuse angle of 135°, which avoids the wheat seeds falling from the seed discharge port of the spiral seeder from falling straight into the drill leg of the seeder, and plays a certain role in buffering and dispersing the seeds.

[0096] A touch screen (single-chip microcomputer) (not shown in the figure) is provided on the seeder, which is used to control the rotation speed of the conveying motor and is communicatively connected to the touch screen (single-chip microcomputer) through bus control. Let the density of wheat seeds sown per unit area measured during sowing be P seeds (g / cm3), and the input display of the sowing amount of wheat seeds per mu on the touch screen is X. （kg / 亩） Since other parameters (seed density, sowing amount per mu, traveling speed) are different during sowing, instructions are sent through the touch screen and the single-chip microcomputer to control quantitative sowing. During sowing, the operator can manually or voice-control the free opening and closing of the conveying motor to solve the problem of border sowing. After sowing, the function of cleaning seeds and fertilizers can be activated with one key to completely clean the seeds and fertilizers in the seeder.

[0097] A positioning module and a radar module are also installed on the seeder, enabling the seeder to have precise positioning to prevent repeated sowing and missed sowing. The positioning module preferably uses a domestic u-blox ZED-F9P model GPS + Beidou BDS module, which supports RTK, has an update frequency of 10Hz, and a horizontal accuracy of 1cm + 1ppm; the encoder is recommended to use the Hengstler RJ58 C model, which is an incremental encoder with a resolution of 1024 pulses / rotation and an IP67 protection level. The speed measurement encoder installed on the main shaft of the seeder's press wheel collects the traveling speed signal of the seeder and transmits it to the touch screen and the single-chip microcomputer to achieve linkage control with the encoder of the seed discharger and the conveying motor.

[0098] The traveling speed of the seeder is proportional to the running speed of the encoder, and the seed discharging speed can be adjusted according to the set sowing amount per mu. Field efficiency verification shows that the sowing efficiency is increased by 120% in actual operation, the daily operation area = 200 mu, and the average emergence rate per mu is increased by 15%. After verification, the technical comparison and advantages analysis of the spiral seed discharger in this utility model with traditional mechanical seed dischargers and air-suction seed dischargers are as shown in the following table:

[0099]

[0100] The technical solution of this utility model is not limited to the limitations of the above specific embodiments. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to those of ordinary skill in the art. Any technical deformation made within the spirit and principle of this utility model falls within the protection scope of this utility model.

Claims

1. A spiral seed metering device for a smart wheat seeder, comprising a seed bin and seed drill legs of the seeder, and a seed metering device connected between the seed bin and the seed drill legs; characterized in that: The seed metering device is a screw conveyor structure, including a cylindrical conveying housing and a rotatable, coaxially inserted screw conveying shaft inside the conveying housing, as well as a conveying motor for driving the screw conveying shaft to rotate; a feed inlet is provided above the front end of the conveying housing, and a seed dispensing inlet is provided at the rear end or bottom of the conveying housing. The feed inlet is connected to the outlet of the seed bin above via a trapezoidal hopper, and the seed dispensing inlet is connected to the inlet of the seed drill leg below via a guide pipe; the head and tail ends of the screw conveying shaft extend from the front and rear ends of the conveying housing respectively, and a driven wheel is installed at the head of the screw conveying shaft. A driving wheel is installed on the output shaft of the conveying motor, and the driving wheel and the driven wheel are connected by a drive mechanism.

2. The intelligent wheat seeder spiral seed metering device according to claim 1, characterized in that: The tail end of the spiral conveyor shaft is connected to a steel wire rope, and a wire hole is provided on the upper side wall of the seed drill leg. The tail end of the steel wire rope is inserted into the bottom of the inner side of the seed drill leg through the wire hole to prevent the inside of the seed drill leg from getting blocked.

3. The intelligent wheat seeder spiral seed metering device according to claim 2, characterized in that: The head end of the wire rope is fixedly connected to the tail end of the screw conveyor shaft via a coupling.

4. The intelligent wheat seeder spiral seed metering device according to claim 1, characterized in that: The trapezoidal bucket has a funnel-shaped structure that is wider at the top and narrower at the bottom, and the front sidewall of the trapezoidal bucket is vertically arranged.

5. The intelligent wheat seeder spiral seed metering device according to claim 1, characterized in that: The guide tube is a bent tubular structure with a vertical front section and an inclined rear section, and the bending angle between the axis of the inclined section and the axis of the vertical section is an obtuse angle.

6. The intelligent wheat seeder spiral seed metering device according to claim 1, characterized in that: The two ends of the spiral conveyor shaft are rotatably connected to the two ends of the conveyor housing via bearings.

7. The intelligent wheat seeder spiral seed metering device according to claim 1, characterized in that: The conveyor motor is a permanent magnet synchronous motor, and an encoder is fitted on the outside of the conveyor motor.

8. The intelligent wheat seeder spiral seed metering device according to claim 7, characterized in that: The seeder is equipped with a touch screen and a microcontroller. The microcontroller controls the speed of the conveyor motor through a Q-value calculation model. An encoder two is installed on the main shaft of the press wheel of the seeder. The Q-value represents the ratio of the speed of the encoder one of the conveyor motor to the speed of the encoder two of the press wheel.

9. A spiral seed metering device for a smart wheat seeder according to claim 8, characterized in that: The seeder is also equipped with a high-speed counting module, a weighing module, a microwave Doppler sensor module, a voice control module, and a positioning module.

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