A seed metering device and method based on air pressure detection and air flow disturbance correction

Abstract

The application discloses a seed sowing device and a method based on air pressure detection and air flow disturbance correction. The seed sowing device comprises an air chamber shell, a sowing shell, a seed box, a seed sowing shaft, a seed suction disc, an air pressure detection device and an air flow disturbance correction device. A plurality of suction holes for adsorbing seeds are arranged on the seed suction disc. The air pressure detection device is used for detecting air pressure data of the suction holes and identifying whether the suction holes normally adsorb seeds. The air flow disturbance correction device is used for blowing and disturbing the seeds that are not normally adsorbed, so as to make the seeds normally adsorbed in the suction holes. The seed sowing device can detect the air pressure of the suction holes, identify whether the suction holes normally adsorb seeds, blow and disturb the seeds on the suction holes through the positive pressure air flow when it is identified that the suction holes are not normally adsorbed, and make the seeds normally adsorbed in the suction holes, so as to correct the adsorption state of the seeds, ensure that one suction hole can better adsorb one seed, and further improve the sowing precision.

Description

Technical Field

[0001] This invention relates to the field of intelligent seeding technology, specifically to a seed metering device and method based on air pressure detection and airflow disturbance correction. Background Technology

[0002] The seed metering device essentially works by acting on the seeds, breaking them down from a group into individual seeds, and then into a uniform seed stream or a continuous stream of single seeds. The seed metering device is the core mechanism of a seeder, and it is a crucial factor determining the quality and performance of the seeder.

[0003] The pneumatic rice seed metering device directly sows rice seeds in the field, eliminating the need for transplanting and seedling raising, thus improving work efficiency and overall profitability. The device primarily uses suction holes on a seed-suction disc to adsorb rice seeds, which are then released into the field by the rotating disc. However, existing pneumatic rice seed metering devices suffer from several drawbacks. Due to the low sphericity of rice seeds, the suction holes are prone to abnormal seed adsorption, such as unstable adsorption or multiple seeds adsorbed by a single hole. When seeds are not adsorbed stably, they may fall off the disc during rotation, leading to under-sowing. Furthermore, multiple seeds adsorbed by a single hole result in duplicate sowing, affecting sowing accuracy. Summary of the Invention

[0004] The purpose of this invention is to overcome the aforementioned problems and provide a seed metering device based on air pressure detection and airflow disturbance correction. This seed metering device can detect the air pressure at the suction hole and identify whether the suction hole is normally adsorbing seeds. When it is identified that the suction hole is not normally adsorbing seeds, positive pressure airflow is used to disturb the seeds on the suction hole, so that the seeds are kept normally adsorbed in the suction hole, thereby correcting the adsorption state of the seeds and ensuring that each suction hole can better adsorb one seed, thereby improving the sowing accuracy.

[0005] Another objective of this invention is to provide a seeding method based on air pressure detection and airflow disturbance correction.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A seed metering device based on air pressure detection and airflow disturbance correction includes an air chamber shell, a seeding shell, a seed box, a seed metering shaft, a seed suction plate, an air pressure detection device, and an airflow disturbance correction device. The seeding shell is installed on one side of the air chamber shell, and the seed metering shaft passes through both the air chamber shell and the seeding shell. The seed suction plate is located between the air chamber shell and the seeding shell and connected to the seed metering shaft. The space between the seed suction plate and the seeding shell forms a seed filling chamber. The seeding shell has a seed metering port, and the seed suction plate has multiple suction holes for adsorbing seeds. When the suction holes move to a position corresponding to the negative pressure air chamber inside the air chamber shell, the seed filling chamber communicates with the negative pressure air chamber inside the air chamber shell through the suction holes. The seed box communicates with the seed filling chamber. The air pressure detection device detects the air pressure data of the suction holes to identify whether the suction holes are properly adsorbing seeds. The airflow disturbance correction device blows air to disturb abnormally adsorbed seeds, promoting normal seed adsorption in the suction holes.

[0008] The working principle of the seed metering device based on air pressure detection and airflow disturbance correction is as follows:

[0009] During operation, the seed metering shaft rotates, causing the seed suction plate to rotate. Seeds from the seed box enter the seed filling chamber. The negative pressure chamber creates suction in the suction holes, adsorbing the seeds. As the seed suction plate rotates, the seeds adsorbed in the suction holes also rotate. When the suction hole reaches the detection position of the air pressure detection device, the device detects the air pressure data of the suction hole to identify whether the suction hole is normally adsorbing seeds. When the suction hole is found to be abnormally adsorbing seeds, the airflow disturbance correction device blows a positive pressure airflow onto the abnormally adsorbed seeds in the suction hole. The positive pressure airflow disturbs the seeds, for example, when the seeds are in an unstable, abnormal adsorption state (…). When the seed and suction hole are not perfectly aligned (there is an excessive gap between the seed and the suction hole), the positive pressure airflow disturbs the seed, causing the seed's posture to adjust so that only one seed remains properly adsorbed in the suction hole. When a seed is in an abnormal adsorption state where multiple seeds are adsorbed in one suction hole, the positive pressure airflow disturbs the seed, causing only one seed to remain properly adsorbed in the suction hole, while the excess seeds are removed and detached from the suction hole. This corrects the seed adsorption state, ensuring that one suction hole can better adsorb one seed. The corrected seed is then discharged from the seed outlet as the seed suction disc rotates, falling into the field and achieving precision sowing.

[0010] In a preferred embodiment of the present invention, the airflow disturbance correction device includes a mounting plate fixed inside the seeding shell, an air nozzle disposed on the mounting plate, a fan disposed outside the seeding shell, and an air pipe disposed between the air nozzle and the fan; one end of the air pipe is connected to the fan, and the other end is connected to the air nozzle; the position of the air nozzle corresponds to the position through which the suction hole passes. In the above structure, a positive airflow is generated by the fan, delivered to the air nozzle through the air pipe, and the positive airflow can be blown out from the air nozzle to disturb abnormally adsorbed seeds in the suction hole, thereby correcting the adsorption state of the seeds.

[0011] Preferably, the air pressure detection device includes a micro pressure transmitter, a data acquisition module, and a data processing module; the micro pressure transmitter is mounted on a mounting plate and is communicatively connected to the data acquisition module; the data acquisition module is communicatively connected to the data processing module; the position of the micro pressure transmitter corresponds to the position through which the suction hole passes. With this structure, the micro pressure transmitter can detect the air pressure data of the suction hole and send the detected air pressure data to the data acquisition module. The data acquisition module sends the data to the data processing module, which performs calculations and determines whether the suction hole is normally adsorbing seeds based on the air pressure data. When the suction hole is not normally adsorbing seeds, the data processing module controls the airflow disturbance correction device to work, blowing positive pressure airflow onto the abnormally adsorbed seeds in the suction hole, thus disturbing the seeds.

[0012] Preferably, there are multiple air nozzles distributed along the circumference. The mounting plate has an arc-shaped flow channel inside, one side of which is connected to the air nozzle and the other side is connected to the air pipe. The number of micro pressure transmitters is the same as the number of air nozzles. Multiple micro pressure transmitters are distributed along the circumference. In the rotation direction of the seed suction plate, the micro pressure transmitters and air nozzles are arranged alternately, and adjacent micro pressure transmitters and air nozzles constitute a detection and correction module. In the above structure, multiple air nozzles and micro-pressure transmitters are set up. Adjacent micro-pressure transmitters and air nozzles form a detection and correction module. During the sowing process, the seed suction plate rotates, and the suction holes with seeds also rotate. When the suction hole first reaches the first detection and correction module, the micro-pressure transmitter of the detection and correction module will detect the air pressure data of the suction hole to determine whether the suction hole is normally adsorbing seeds. If the suction hole is not normally adsorbing seeds, the air nozzle of the detection and correction module will blow out a positive pressure airflow to disturb the seeds. As the seed suction plate rotates, the suction hole with seeds will reach the next detection and correction module, and the above steps are repeated for detection and correction. This can further improve the sowing accuracy and prevent the seeds from not being properly adsorbed when the previous detection and correction module disturbs the seeds. The next detection and correction module will then detect and correct the seeds, thus improving the sowing accuracy.

[0013] Preferably, in the radial direction, the multiple suction holes are divided into two rows, and the multiple detection and correction modules are also divided into two rows.

[0014] Prior to this, the data processing module has a built-in data model. The data model is used to analyze and judge the air pressure data to determine whether the suction hole is properly adsorbing seeds.

[0015] Preferably, a connector is provided between the seed box and the sowing shell, with one end of the connector communicating with the seed box and the other end communicating with the seed filling chamber. By providing the connector, the seed box and the sowing shell can be better connected, and the seeds in the seed box can also be discharged into the seed filling chamber.

[0016] Preferably, the seeding shell has an arc-shaped partition plate inside, which divides the seed filling chamber into a seed filling area and a seed discharging channel. One end of the seed discharging channel is connected to the seed filling area, and the other end is connected to the seed discharging port. The connecting piece is connected to the seed filling area. During sowing, the seed suction plate rotates, and the suction holes in the seed filling area also rotate with the seed suction plate. After being detected and corrected by the detection and correction module, the adsorbed seeds enter the seed discharging channel and are finally discharged into the field from the seed discharging port.

[0017] Preferably, the air chamber shell is provided with a positive pressure air chamber. When the suction hole moves to the position corresponding to the positive pressure air chamber inside the air chamber shell, the positive pressure air chamber communicates with the suction hole. During the sowing process, the seed suction plate rotates, and the suction hole on the seed suction plate communicates with the negative pressure air chamber and then with the positive pressure air chamber successively. When the suction hole is connected to the negative pressure air chamber, the suction hole adsorbs the seeds. When the suction hole is connected to the positive pressure air chamber, the seeds are blown away from the suction hole by the gas in the positive pressure air chamber, and then fall from the seed discharging channel, and finally are discharged into the field from the seed discharging port.

[0018] A seed metering method based on air pressure detection and airflow disturbance correction, applied to the seed metering device, includes the following steps:

[0019] (1) The seed metering shaft rotates, which drives the seed suction plate to rotate. The seeds in the seed box enter the seed filling chamber. The negative pressure air chamber has negative pressure, which causes the suction hole to generate suction force to adsorb the seeds.

[0020] (2) As the seed suction plate rotates, the seeds adsorbed by the suction hole also rotate. When the suction hole reaches the detection position of the air pressure detection device, the air pressure detection device detects the air pressure data of the suction hole to identify whether the suction hole is adsorbing seeds normally. When the suction hole is identified as not adsorbing seeds normally, the airflow disturbance correction device blows positive pressure airflow onto the abnormally adsorbed seeds on the suction hole. The positive pressure airflow disturbs the seeds and promotes the seeds to maintain normal adsorption in the suction hole, thereby correcting the adsorption state of the seeds.

[0021] (3) The normally adsorbed seeds and the corrected seeds rotate with the seed adsorption plate and are finally discharged from the seed discharge port and fall into the field.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The seed metering device based on air pressure detection and airflow disturbance correction in this invention, by setting up an air pressure detection device and an airflow disturbance correction device, when the suction hole reaches the detection position of the air pressure detection device, the air pressure detection device detects the air pressure data of the suction hole to identify whether the suction hole is normally adsorbing seeds. When it is identified that the suction hole is not normally adsorbing seeds, the airflow disturbance correction device blows a positive pressure airflow onto the abnormally adsorbed seeds in the suction hole. The positive pressure airflow disturbs the seeds, prompting the seeds to maintain normal adsorption in the suction hole, thereby correcting the adsorption state of the seeds and ensuring that one suction hole can perfectly adsorb one seed, thus improving the sowing accuracy.

[0024] 2. The seed metering device based on air pressure detection and airflow disturbance correction in this invention adjusts the posture of the seeds and removes excess seeds through the airflow disturbance correction device. The airflow disturbance will not damage the seeds, thus ensuring the quality of sowing. Attached Figure Description

[0025] Figures 1-2 This is a schematic diagram of one specific embodiment of a seed metering device based on air pressure detection and airflow disturbance correction according to the present invention, wherein, Figure 1 It is a 3D image. Figure 2 This is a stereoscopic view from another perspective.

[0026] Figure 3 This is an exploded view of the seed metering device in this invention.

[0027] Figure 4 This is a side view of the seed metering device, which conceals the seed box and the connecting parts in this invention.

[0028] Figure 5 for Figure 4 A cross-sectional view along the AA direction.

[0029] Figure 6 This is a partial structural diagram of the seed metering device in this invention.

[0030] Figure 7 This is a three-dimensional structural diagram of the seed suction disc in this invention.

[0031] Figures 8-9 These are perspective views of the airflow disturbance correction device of the present invention from different viewing angles.

[0032] Figures 10-11These are schematic diagrams of the air chamber shell in this invention from different viewing angles.

[0033] Figures 12-13 These are schematic diagrams of the seeding shell in this invention from different viewing angles.

[0034] Figure 14 This is a flowchart of a seeding method based on air pressure detection and airflow disturbance correction in this invention. Detailed Implementation

[0035] To enable those skilled in the art to fully understand the technical solutions of the present invention, the present invention will be further described below in conjunction with embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0036] Example 1

[0037] See Figures 1-7 This embodiment discloses a seed metering device based on air pressure detection and airflow disturbance correction, including an air chamber shell 1, a seeding shell 2, a seed box 3, a seed metering shaft 4, a seed suction plate 5, an air pressure detection device 6, and an airflow disturbance correction device 7; wherein, the seeding shell 2 is installed on one side of the air chamber shell 1, the seed metering shaft 4 passes through the air chamber shell 1 and the seeding shell 2, and the seed metering shaft 4 is rotatably connected to both the air chamber shell 1 and the seeding shell 2; the seed suction plate 5 is located between the air chamber shell 1 and the seeding shell 2 and is connected to the seed metering shaft 4; the space between the seed suction plate 5 and the seeding shell 2 constitutes a seed filling chamber 8; The seeding shell 2 is provided with a seed outlet 9, and the seed suction plate 5 is provided with multiple suction holes 5-1 for adsorbing seeds. When the suction hole 5-1 moves to the position corresponding to the negative pressure air chamber 1-1 inside the air chamber shell 1, the seed filling chamber 8 is connected to the negative pressure air chamber 1-1 inside the air chamber shell 1 through the suction hole 5-1; the seed box 3 is connected to the seed filling chamber 8; the air pressure detection device 6 is used to detect the air pressure data of the suction hole 5-1 and identify whether the suction hole 5-1 is adsorbing seeds normally; the airflow disturbance correction device 7 is used to blow air to disturb abnormally adsorbed seeds, so as to make the seeds maintain normal adsorption in the suction hole 5-1.

[0038] See Figures 1-7When a seed does not perfectly fit with the suction hole 5-1, airflow will enter the suction hole 5-1, causing a certain pressure change, and the pressure data is relatively large. When multiple seeds are simultaneously adsorbed into the suction hole 5-1, the pressure at the suction hole 5-1 will also be different. When the suction hole 5-1 adsorbs only one seed and fits perfectly, the pressure data at the suction hole 5-1 will be very small. By detecting the pressure data of the suction hole 5-1, the adsorption state of the suction hole 5-1 can be obtained. Therefore, a data model can be established to determine the adsorption state of the suction hole 5-1. When the suction hole 5-1 adsorbs only one seed and fits perfectly, it is considered normal seed adsorption. When the suction hole 5-1 adsorbs only one seed and does not fit perfectly, with a large gap between the seed and the suction hole 5-1; or when the suction hole 5-1 adsorbs multiple seeds simultaneously, it is considered abnormal seed adsorption.

[0039] See Figures 1-9 The airflow disturbance correction device 7 includes a mounting plate 7-1 fixed inside the seeding shell 2, an air nozzle 7-2 mounted on the mounting plate 7-1, a fan 7-3 mounted outside the seeding shell 2, and an air pipe 7-4 positioned between the air nozzle 7-2 and the fan 7-3. One end of the air pipe 7-4 is connected to the fan 7-3, and the other end is connected to the air nozzle 7-2. The position of the air nozzle 7-2 corresponds to the position through which the suction hole 5-1 passes. In this structure, the fan 7-3 generates a positive airflow, which is delivered to the air nozzle 7-2 via the air pipe 7-4. The positive airflow can be blown out from the air nozzle 7-2 to disturb the abnormally adsorbed seeds in the suction hole 5-1, thereby correcting the adsorption state of the seeds.

[0040] Furthermore, the air nozzle 7-2 is detachably connected to the mounting plate 7-1, which allows the air nozzle 7-2 to be replaced independently, changing the blowing angle of the air nozzle 7-2 and improving the flexibility of blowing.

[0041] See Figures 5-9 The mounting plate 7-1 is fixed inside the seeding shell 2 by the fixing rod 7-5.

[0042] See Figures 1-9The air pressure detection device 6 includes a micro pressure transmitter 6-1, a data acquisition module, and a data processing module. The micro pressure transmitter 6-1 is mounted on the mounting plate 7-1 and is communicatively connected to the data acquisition module. The data acquisition module is communicatively connected to the data processing module. The position of the micro pressure transmitter 6-1 corresponds to the position through which the suction hole 5-1 passes. With this structure, the micro pressure transmitter 6-1 can detect the air pressure data of the suction hole 5-1 and send the detected air pressure data to the data acquisition module. The data acquisition module sends the data to the data processing module, which performs calculations and determines whether the suction hole 5-1 is properly adsorbing seeds based on the air pressure data. When the suction hole 5-1 is not properly adsorbing seeds, the data processing module controls the airflow disturbance correction device 7 to work, blowing positive pressure airflow onto the abnormally adsorbed seeds in the suction hole 5-1, thus disturbing the seeds.

[0043] See Figures 1-6 The air pressure detection device 6 also includes a box 6-2 installed on the seed shell 2, and the data acquisition module and the data processing module are integrated in the box 6-2.

[0044] See Figures 1-9 The fan 7-3 is also located inside the housing 6-2. The purpose of this is to make the structure more compact.

[0045] Each air nozzle 7-2 is equipped with a solenoid valve. The data processing module sends commands to the solenoid valve to control the opening and closing of the air nozzle 7-2.

[0046] See Figures 1-9The number of air nozzles 7-2 is multiple, and the multiple air nozzles 7-2 are distributed along the circumference. The mounting plate 7-1 is arc-shaped, and the interior of the mounting plate 7-1 has an arc-shaped flow channel. One side of the arc-shaped flow channel is connected to the air nozzle 7-2, and the other side is connected to the air pipe 7-4. The number of micro pressure transmitters 6-1 is the same as the number of air nozzles. The multiple micro pressure transmitters 6-1 are distributed along the circumference. In the rotation direction of the seed suction plate 5, the micro pressure transmitters 6-1 and the air nozzles 7-2 are arranged alternately. Adjacent micro pressure transmitters 6-1 and air nozzles 7-2 constitute a detection and correction module 10. In the above structure, multiple air nozzles 7-2 and micro pressure transmitters 6-1 are set up. Adjacent micro pressure transmitters 6-1 and air nozzles 7-2 constitute a detection and correction module 10. During the sowing process, the seed suction plate 5 rotates, and the suction holes 5-1 that have absorbed seeds also rotate. When the suction hole 5-1 first reaches the first detection and correction module 10, the micro pressure transmitter 6-1 of the detection and correction module 10 will detect the air pressure data of the suction hole 5-1 to determine whether the suction hole 5-1 has properly absorbed seeds. If the suction hole 5-1 has not properly absorbed seeds, the detection and correction module will... The air nozzle 7-2 of module 10 blows out a positive pressure airflow to agitate the seeds. As the seed suction plate 5 rotates, the suction hole 5-1 with seeds adsorbed will reach the next detection and correction module 10. The above steps are repeated for detection and correction. This can further improve the sowing accuracy and prevent the seeds from not being properly adsorbed when the previous detection and correction module 10 agitates them. The seeds will then be detected and corrected by the next detection and correction module 10. Therefore, each suction hole 5-1 undergoes air pressure detection and correction through multiple detection and correction modules 10, which can improve the sowing accuracy and quality.

[0047] Multiple detection and correction modules 10 can perform multiple tests on each suction hole to transform abnormally adsorbed seeds into a normally adsorbed state.

[0048] See Figures 1-9 In the radial direction, multiple suction holes 5-1 are arranged in two rows, with each row of suction holes 5-1 evenly distributed along the circumference. Multiple detection and correction modules 10 are also arranged in two rows. Each row contains 8 suction holes 5-1, for a total of 16 holes in both rows. There are 8 air nozzles 7-2, arranged in two rows of 4 in each row. There are also 8 micro-pressure transmitters 6-1, arranged in two rows of 4 in each row. Therefore, there are a total of 8 detection and correction modules 10, arranged in rows of 4.

[0049] See Figures 1-9 The data processing module has a built-in data model. The data model is used to analyze and judge the air pressure data to determine whether the suction hole 5-1 can properly adsorb seeds.

[0050] See Figures 1-3 A connector 11 is provided between the seed box 3 and the sowing shell 2. One end of the connector 11 is connected to the seed box 3, and the other end is connected to the seed filling chamber 8. By providing the connector 11, the seed box 3 and the sowing shell 2 can be connected more effectively, and the seeds in the seed box 3 can also be discharged into the seed filling chamber 8.

[0051] See Figures 1-5 and Figures 12-13 The seeding shell 2 has an arc-shaped partition plate 12 inside, which divides the seed filling chamber 8 into a seed filling area 8-1 and a seed discharging channel 8-2. One end of the seed discharging channel 8-2 is connected to the seed filling area 8-1, and the other end is connected to the seed discharging port 9. The connecting piece 11 is connected to the seed filling area 8-1. During sowing, the seed suction plate 5 rotates, and the seeds adsorbed in the seed filling area 8-1 by the suction hole 5-1 also rotate with the seed suction plate 5. After being detected and corrected by the detection and correction module 10, the adsorbed seeds enter the seed discharging channel 8-2 and are finally discharged into the field from the seed discharging port 9.

[0052] See Figures 1-5 and Figures 10-11 The air chamber shell 1 is provided with a positive pressure air chamber 1-2. When the suction hole 5-1 moves to the position corresponding to the positive pressure air chamber 1-2, the positive pressure air chamber 1-2 communicates with the suction hole 5-1. During the sowing process, the seed suction plate 5 will rotate, and the suction hole 5-1 on the seed suction plate 5 will communicate with the negative pressure air chamber 1-1 and the positive pressure air chamber 1-2 in turn. When the suction hole 5-1 is connected to the negative pressure air chamber 1-1, the suction hole 5-1 adsorbs the seeds. When the suction hole 5-1 is connected to the positive pressure air chamber 1-2, the seeds will be blown away from the suction hole 5-1 by the gas in the positive pressure air chamber 1-2. The seeds will then fall from the seed discharge channel 8-2 and finally be discharged into the field from the seed discharge port 9.

[0053] See Figures 1-5 and Figures 10-11 The air chamber housing 1 is equipped with a negative pressure connector 13 and a positive pressure connector 14. One end of the negative pressure connector 13 is connected to the negative pressure air chamber 1-1, and the other end of the negative pressure connector 13 is connected to the negative pressure device. One end of the positive pressure connector 14 is connected to the positive pressure air chamber 1-2, and the other end of the positive pressure connector 14 is connected to the air blowing device. The air blowing device can provide positive pressure airflow to the positive pressure air chamber 1-2, and the negative pressure device can provide negative pressure to the negative pressure air chamber 1-1.

[0054] See Figures 1-5 The seed metering device also includes a motor for driving the seed metering shaft 4 to rotate and a seed metering tube 15 disposed at the lower end of the seeding housing 2; the upper end of the seed metering tube 15 is connected to the seed metering port 9. During sowing, the seeds fall from the seed metering port 9 into the seed metering tube 15 and are finally discharged into the field through the seed metering tube 15.

[0055] See Figures 1-5 and Figure 10 The air chamber shell 1 has an inner groove 1-3 on the side near the seeding shell 2, and the seed suction plate 5 is installed in the inner groove 1-3. The purpose is to ensure the airtightness between the seed suction plate 5 and the air chamber shell 1, and also to allow the seed suction plate 5 to rotate.

[0056] See Figures 1-6 The seed metering shaft 4 is provided with a flange 16, which is connected to the seed metering shaft 4 through a keyway, and the seed suction plate 5 is connected to the flange 16 by bolts.

[0057] See Figures 1-5 and Figures 12-13 The lower end of the seeding shell 2 is provided with a seed unloading component 17, the purpose of which is to open the seed unloading component 17 to clean out the seeds in the seed filling area 8-1.

[0058] See Figures 1-6 and Figure 14 The working principle of the seed metering device based on air pressure detection and airflow disturbance correction is as follows:

[0059] During operation, the seed metering shaft 4 rotates, driving the seed suction plate 5 to rotate. Seeds from the seed box 3 enter the seed filling chamber 8. The negative pressure chamber 1-1 has negative pressure, causing the suction holes 5-1 to generate suction force, adsorbing the seeds. As the seed suction plate 5 rotates, the seeds adsorbed by the suction holes 5-1 also rotate. When the suction hole 5-1 reaches the detection position of the air pressure detection device 6, the air pressure detection device 6 detects the air pressure data of the suction hole 5-1 to identify whether the suction hole 5-1 is normally adsorbing seeds. When it is identified that the suction hole 5-1 is abnormally adsorbing seeds, the airflow disturbance correction device 7 blows positive pressure airflow onto the abnormally adsorbed seeds on the suction hole 5-1. The positive pressure airflow disturbs the seeds. For example, when the seeds are in an unstable abnormal adsorption state (i.e., the seed and the suction hole 5-1 are not perfectly matched, and there is a gap between the seed and the suction hole 5-1)... When the gap is too large, the positive pressure airflow disturbs the seeds, causing them to adjust their posture so that only one seed remains normally adsorbed in the suction hole 5-1. When a seed is in an abnormal adsorption state where multiple seeds are simultaneously adsorbed in one suction hole 5-1, the positive pressure airflow disturbs the seeds, causing only one seed to remain normally adsorbed in the suction hole 5-1, while the excess seeds are removed and detached from the suction hole 5-1. This corrects the seed adsorption state, ensuring that one suction hole 5-1 can better adsorb one seed. The corrected seed rotates with the seed suction plate 5 and is finally discharged from the seed discharge port 9, falling into the field, achieving precise sowing. When the suction hole 5-1 is identified as being normally adsorbed, the airflow disturbance correction device 7 does not work, and the normally adsorbed seed rotates with the seed suction plate 5 and is finally discharged from the seed discharge port 9, falling into the field.

[0060] Example 2

[0061] See Figures 1-6 and Figure 14 This embodiment discloses a seed metering method based on air pressure detection and airflow disturbance correction. This seed metering method is applied to the seed metering device described in Embodiment 1 and includes the following steps:

[0062] (1) The seed metering shaft 4 rotates, which drives the seed suction plate 5 to rotate. The seeds in the seed box 3 enter the seed filling chamber 8. The negative pressure air chamber 1-1 has negative pressure, which causes the suction hole 5-1 to generate suction force to adsorb the seeds.

[0063] (2) As the seed suction plate 5 rotates, the seeds adsorbed by the suction hole 5-1 also rotate. When the suction hole 5-1 reaches the detection position of the air pressure detection device 6, the air pressure detection device 6 detects the air pressure data of the suction hole 5-1 to identify whether the suction hole 5-1 is adsorbing seeds normally. When it is identified that the suction hole 5-1 is not adsorbing seeds normally, the airflow disturbance correction device 7 blows positive pressure airflow onto the abnormally adsorbed seeds on the suction hole 5-1. The positive pressure airflow disturbs the seeds and causes the seeds to maintain normal adsorption in the suction hole 5-1, thereby correcting the adsorption state of the seeds.

[0064] (3) The normally adsorbed seeds and the corrected seeds rotate with the seed suction plate 5 and are finally discharged from the seed discharge port 9 and fall into the field.

[0065] In step (2), after the airflow disturbance correction device 7 disturbs the abnormally adsorbed seeds on the suction hole 5-1, the air pressure detection device 6 repeatedly detects the air pressure data of the suction hole 5-1 until the seeds are normally adsorbed in the suction hole 5-1, at which point the airflow disturbance correction device 7 stops blowing air to disturb the seeds. That is, by setting up multiple detection and correction modules 10, the air pressure of the suction hole 5-1 is detected and the seeds in the suction hole 5-1 are corrected.

[0066] The above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A seed metering device based on air pressure detection and airflow disturbance correction, characterized in that, The device includes an air chamber shell, a seeding shell, a seed box, a seed dispensing shaft, a seed suction plate, an air pressure detection device, and an airflow disturbance correction device. The seeding shell is installed on one side of the air chamber shell, and the seed dispensing shaft passes through both the air chamber shell and the seeding shell. The seed suction plate is located between the air chamber shell and the seeding shell and connected to the seed dispensing shaft. The space between the seed suction plate and the seeding shell forms a seed filling chamber. The seeding shell has a seed dispensing port, and the seed suction plate has multiple suction holes for adsorbing seeds. When the suction holes move to a position corresponding to the negative pressure air chamber inside the air chamber shell, the seed filling chamber communicates with the negative pressure air chamber inside the air chamber shell through the suction holes. The seed box communicates with the seed filling chamber. The air pressure detection device detects the air pressure data of the suction holes to identify whether the suction holes are properly adsorbing seeds. The airflow disturbance correction device blows air to disturb abnormally adsorbed seeds, promoting normal seed adsorption in the suction holes. The airflow disturbance correction device includes a mounting plate fixed inside the seeding shell, an air nozzle mounted on the mounting plate, a fan mounted outside the seeding shell, and an air pipe between the air nozzle and the fan; one end of the air pipe is connected to the fan, and the other end is connected to the air nozzle; the position of the air nozzle corresponds to the position through which the suction hole passes. The air nozzle is detachably connected to the mounting plate, and the air nozzle can be replaced independently to change the air blowing angle. The air pressure detection device includes a micro pressure transmitter, a data acquisition module, and a data processing module; the micro pressure transmitter is mounted on a mounting plate and is communicatively connected to the data acquisition module; the data acquisition module is communicatively connected to the data processing module; the position of the micro pressure transmitter corresponds to the position through which the suction hole passes; The number of air nozzles is multiple, and the multiple air nozzles are distributed along the circumference. The mounting plate has an arc-shaped flow channel inside, one side of which is connected to the air nozzle and the other side is connected to the air pipe. The number of micro pressure transmitters is the same as the number of air nozzles. The multiple micro pressure transmitters are distributed along the circumference. In the rotation direction of the seed suction plate, the micro pressure transmitters and the air nozzles are arranged alternately, and adjacent micro pressure transmitters and air nozzles constitute a detection and correction module.

2. The seed metering device based on air pressure detection and airflow disturbance correction according to claim 1, characterized in that, In the radial direction, multiple suction holes are divided into two rows, and multiple detection and correction modules are also divided into two rows.

3. A seed metering device based on air pressure detection and airflow disturbance correction according to claim 1, characterized in that, The data processing module has a built-in data model. The data model is used to analyze and judge the air pressure data to determine whether the suction hole is properly adsorbing seeds.

4. A seed metering device based on air pressure detection and airflow disturbance correction according to claim 1, characterized in that, A connector is provided between the seed box and the sowing shell, with one end of the connector communicating with the seed box and the other end communicating with the seed filling chamber.

5. A seed metering device based on air pressure detection and airflow disturbance correction according to claim 1, characterized in that, The seeding shell is equipped with an arc-shaped partition plate inside, which divides the seed filling chamber into a seed filling area and a seed discharging channel. One end of the seed discharging channel is connected to the seed filling area, and the other end of the seed discharging channel is connected to the seed discharging port. The connector is connected to the seed filling area.

6. A seeding method based on air pressure detection and airflow disturbance correction, characterized in that, The seeding method, applied to the seeder as described in any one of claims 1-5, includes the following steps: (1) The seed metering shaft rotates, which drives the seed suction plate to rotate. The seeds in the seed box enter the seed filling chamber. The negative pressure air chamber has negative pressure, which causes the suction hole to generate suction force to adsorb the seeds. (2) As the seed suction plate rotates, the seeds adsorbed by the suction hole also rotate. When the suction hole reaches the detection position of the air pressure detection device, the air pressure detection device detects the air pressure data of the suction hole and identifies whether the suction hole is adsorbing seeds normally. When the suction hole is identified as not adsorbing seeds normally, the airflow disturbance correction device blows positive pressure airflow onto the abnormally adsorbed seeds on the suction hole. The positive pressure airflow disturbs the seeds and promotes the seeds to maintain normal adsorption in the suction hole, thereby correcting the adsorption state of the seeds. (3) The normally adsorbed seeds and the corrected seeds rotate with the seed suction plate and are finally discharged from the seed discharge port and fall into the field.

7. The seeding method based on air pressure detection and airflow disturbance correction according to claim 6, characterized in that, In step (2), after the airflow disturbance correction device disturbs the abnormally adsorbed seeds on the suction hole, the air pressure detection device repeatedly detects the air pressure data of the suction hole until the seeds are normally adsorbed in the suction hole, and then the airflow disturbance correction device stops blowing air to disturb.

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