Seed metering detection device, seed metering device, hole sowing machine and seed metering detection method

Abstract

The invention discloses a seed-metering detection device, a seed-metering device, a hole sowing machine and a seed-metering detection method, and the seed-metering detection device comprises a first detection sensor which is arranged on a shell of the seed-metering device and is located at the tail section of an operation path of a pickup part for picking up seeds of a seed-metering disc of the seed-metering device; the second detection sensor is arranged at a seed metering opening of the seed metering device; when the first detection sensor and the second detection sensor both detect seeds in a detection period, the current hole sowing is recorded as normal, and otherwise, the current hole sowing is recorded as failure. The seed metering detection device provided by the invention is relatively good in detection accuracy.

Description

Technical Field

[0001] The present invention relates to a clock detection device for a seeding device equipped with a hole-seeding seeder. The present invention also relates to a seeding device equipped with the clock detection device. The present invention further relates to a hole-seeding seeder equipped with the seeding device. The present invention further relates to a seeding detection method suitable for the seeding detection device. Background Art

[0002] Cave-casting machine, also known as cave-casting machine for short, refers to a sowing machine that sows seeds in holes according to a certain row spacing and hole spacing. It is currently widely used in the planting of crops such as corn, peanuts, cotton, sunflowers, and pumpkins. Cave-casting machines generally include a frame, a seed cabin mounted on the frame, a number of seed-seeding devices arranged horizontally on the frame, and a furrow opener and a soil-covering and suppressing device arranged under the frame and corresponding to the seed-seeding devices. There are often no less than three seed-seeding devices on a cave-casting machine, and the seed-seeding devices are generally connected to the seed cabin through a pipeline. Cave-casting machines are suitable for crops with relatively few plants per mu, but not for crops with relatively large plants per mu such as wheat, millet, and rice. Considering the biological activity of seeds and pests and diseases during sowing, the number of seeds sown in each hole is generally 1 to 3. If the expected sowing amount for each hole is 1, a certain number of missed sowings may occur due to the reliability of the sowing machine.

[0003] The seeding device equipped with the hole seeder that is currently more widely used is a disc type seeding device, which usually includes a roughly circular seat and a roughly barrel-shaped cover, wherein the seat is used to install the seeding device on the frame, and a circular seeding disk is installed in the seat, and the seeding disk is directly installed on the seat through a bearing or indirectly installed on the seat through other rotating parts, and a cavity is formed between one side of the seeding disk and the seat or other rotating parts, and the cavity is externally connected to a vacuum device, and the seeding disk has suction holes in a circular array, and a mold hole (generally called a seed suction hole) or a seed suction nozzle is formed on the other side of the seeding disk.

[0004] The cover is fixedly connected to the seat, a space is formed between the seeding disc and the bottom plate of the cover, the cover is connected to the seed inlet pipe, and a seed storage space is formed in a predetermined area on the lower side of the space (the axis of the seeding device is generally horizontal, that is, the seeding disc is generally installed vertically), and when the rotating seeding disc passes through the seed storage space, the seed suction hole or seed suction nozzle will absorb a certain number of seeds. However, due to the control of suction force, such as the speed of the seed suction nozzle when passing through the seed storage space, the compression density of the seeds in the seed storage area, etc., some seed suction holes or seed suction nozzles cannot absorb seeds, or during the operation of the seeding disc, some seeds fall prematurely and cannot reach or reach the seed outlet prematurely, which may result in no seeds in some holes, that is, missed sowing.

[0005] If the missed seeding rate is relatively high, for example, more than 10%, it will seriously affect the crop yield. Therefore, a seeding detection device is provided on the seeding device to confirm whether the seeding device needs to be repaired according to the detected missed seeding rate.

[0006] Currently, optical sensors installed at the seed discharge port of the seed meter are mostly used for seed detection. Since the seeds may be mixed with some debris or need to be coated (such as bran), optical sensors are more likely to make false detections or missed detections.

[0007] Since a hole seeder is often equipped with multiple seeders, a current seeding detection method is to compare the seeding conditions detected by all optical sensors on all seeders at the same time ± margin. If an optical sensor does not detect seeds, there is a missed seeding situation at the corresponding hole at the current moment. This detection method has a relatively narrow scope of application, mainly requiring that the seeding discs of the seeders on the same hole seeder are exactly the same in their division mode and that the crop rows are relatively regular, but it cannot solve the problem of false detection or missed detection when a seeder is only equipped with one optical sensor. Summary of the invention

[0008] The object of the present invention is to provide a seeding detection device with relatively good detection accuracy, and correspondingly provide a seeding detection method. Another object of the present invention is to provide a seeding device equipped with the seeding detection device. Another object of the present invention is to provide a hole sowing machine equipped with the seeding device.

[0009] According to a first aspect of an embodiment of the present invention, a seeding detection device is provided for detecting seeding of a seeding device of a hole sowing seeder, the seeding detection device comprising: The first detection sensor is arranged on the housing of the seed metering device and is located at the end of the running path of the picking component of the seeding disc of the seed metering device for picking up seeds; The second detection sensor is arranged at the seed discharge port of the seed discharger; When the first detection sensor and the second detection sensor both detect seeds within one detection cycle, it is recorded that the sowing of the current hole is normal; otherwise, it is recorded that the sowing of the current hole fails.

[0010] Optionally, the first detection sensor is located at the rear side of a second seed removing component for removing seeds corresponding to the end section.

[0011] Optionally, the first detection sensor and the second detection sensor are both optical sensors, the first detection sensor is included in a first sensor assembly, the second detection sensor is included in a second sensor assembly, and the first sensor assembly and the second sensor assembly both include a sensor mounting bracket, and the sensor mounting bracket includes: The bracket body has a sensor mounting portion; The air outlet or hole group is formed on the support body or arranged on a given tube body. Correspondingly, if arranged on the tube body, the tube body is mounted on the support body or is an integral structure with the support body; The air outlet or hole group is opposite to the sensor installed at the sensor mounting portion.

[0012] Optionally, the bracket body included in the second sensor assembly is a tube housing structure, one end of the tube housing is an inlet, and the other end is an outlet, and the corresponding outlet end constitutes a second detection sensor installation portion; A group of mounting positions are respectively arranged on two opposite sides of the outlet end, wherein the mounting positions on one side are used to mount the transmitting end of the optical sensor, and the mounting positions on the other side are used to mount the receiving end of the optical sensor.

[0013] Optionally, the arrangement of the transmitting ends and the arrangement of the receiving ends are arranged in two straight lines or in two arcs; If there are two arcs, the distance between the two arcs is the farthest; If there are two straight line arrangements, the two straight line arrangements are parallel.

[0014] Optionally, if there are two linear arrangements, the air outlets or hole groups correspond one to one with the linear arrangements and are respectively located at one end of the linear arrangements so as to face the other end of the corresponding linear arrangements; or The air outlets or hole groups correspond to the installation positions one by one and are located on a side of the installation position corresponding to the second detection sensor; If there are two arc-shaped arrangements, the air outlets or hole groups correspond to the installation positions one by one and are located on a side of the installation position corresponding to the second detection sensor.

[0015] Optionally, the installation position has: an arc-shaped groove portion, the axis of which is parallel to or consistent with the extension direction of the sensor probe of the second detection sensor; A back mounting seat, correspondingly located at the back side of the sensor probe, for mounting the sensor probe; If the air outlet or hole group corresponds to the installation position one by one, the air outlet or hole group is opened at the bottom of the arc-shaped groove; If the air outlet or hole group is located at one end of the linear arrangement, the arcuate groove portion is omitted or a portion of the groove wall is omitted from the end where the air outlet or hole group is located to expose the head end of the sensor probe.

[0016] Optionally, if the air outlet or hole group is located at one end of the linear arrangement, the air outlet or hole group is located on the corresponding tube body.

[0017] Optionally, the inlet portion of the tube shell forms a bucket-shaped structure, and at the bucket-shaped structure, the flow cross-section gradually decreases in the direction from the inlet to the outlet.

[0018] Optionally, adapted for the first detection sensor, the sensor mounting bracket comprises: A pair of support arms are provided, and the two corresponding support arms are arranged in parallel, and the support arms have an air flow channel arranged in the extending direction of the arm body, and an air outlet is provided at one end of the support arm, and an air inlet is provided at the other end, wherein a mounting position for mounting a first detection sensor is provided at the air outlet, and the air outlet is correspondingly located at one side of the mounting position, so that the corresponding first detection sensor is flushed by the air outlet; The connecting arm is used for connecting the two supporting arms in the middle or at the air inlet end of the supporting arms.

[0019] Optionally, the side of the two mounting positions that is away from each other is a back plate, which is used as a mounting base plate for the first detection sensor, so that the support arm forms a step structure at the air outlet end; The air outlet is correspondingly located on the tread of the step structure.

[0020] Optionally, a guide fin is provided on the kick surface of the step structure, and the guide fin is located between the first detection sensor and the tread, so as to deflect part of the airflow directly blowing the first detection sensor toward the probe side of the first detection sensor.

[0021] Optionally, the air flow channel is perpendicular to the probe of the first detection sensor, and the radial extension of the guide fin in the air flow channel is the radius of the air flow channel; The included angle between the guide fin and the axis of the air flow channel is 30°~60°.

[0022] According to a second aspect of the embodiments of the present invention, a seed metering device is provided, comprising the seed metering detection device described in the first aspect of the embodiments of the present invention.

[0023] According to a third aspect of the embodiment of the present invention, a hole seeding machine is provided, comprising a frame and a plurality of seed metering devices according to the second aspect of the embodiment of the present invention arranged transversely on the frame.

[0024] According to a fourth aspect of an embodiment of the present invention, a seeding detection method is provided, which is applicable to the seeding detection device described in the first aspect of the embodiment of the present invention to perform seeding detection on a seeding device, and the seeding detection method comprises: When the first detection sensor and the second detection sensor both detect seeds within one detection cycle, it is recorded that the current hole is sown normally, otherwise it is recorded that the current hole is sown unsuccessfully and marked as missed sowing; The ratio of the number of missed sowings to the expected number of sowings is recorded as the missed sowing rate. If the missed sowing rate within a predetermined time period is equal to or higher than the preset missed sowing rate, an alarm signal is generated.

[0025] Optionally, the method further includes a step of eliminating false positives, wherein the step of eliminating false positives is: The current time when the current seed reaches the first detection sensor and the detection window at the current rotation speed are determined according to the rotation speed of the seeding disc, and the detection information reported in the time period other than the current detection window in the current detection cycle is discarded.

[0026] Different from the prior art where a sensor for detecting seeding is provided on a seeding device, the seeding detection device according to the embodiment of the present invention is provided with two sensors on a seeding device, one of which is used for detecting the end of seed delivery, and the other is used for detecting seed discharge. When both sensors detect seeds within a predetermined detection period, it is confirmed that the sowing is normal, otherwise it is recorded as missed sowing. It should be noted that double confirmation may cause false alarms, but false alarms do not cause actual losses, and may only shorten the maintenance cycle. However, double confirmation can also reduce another type of false alarm. For example, if one sensor detects that there are seeds, and another sensor does not detect that there are seeds, in this case, it may be that one of the sensors is a false alarm. In this case, treating it as missed sowing will not cause actual losses, but it can reduce the actual missed sowing caused by the false alarm of a single sensor, so the overall accuracy is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure is a schematic structural diagram of the matching relationship between the cover shell and the seeding disk in a seeding device in one embodiment.

[0028] Figure 2 Schematic diagram of the structure of a seed meter in one embodiment.

[0029] Figure 3 Schematic diagram of a cover structure of a seed meter in one embodiment (with a first sensor assembly and a second sensor assembly installed).

[0030] Figure 4 Another schematic diagram of the cover structure of the seed meter in one embodiment (with the first sensor assembly and the second sensor assembly installed).

[0031] Figure 5 Schematic diagram of the structure of the seed meter cover in one embodiment (the first sensor component and the second sensor component are not installed).

[0032] Figure 6 This is a schematic diagram of the first structure of the sensor mounting bracket in the first embodiment.

[0033] Figure 7 This is a schematic diagram of the second structure of the sensor mounting bracket in the first embodiment.

[0034] Figure 8 It is a schematic diagram of the structure of the sensor mounting bracket in the second embodiment.

[0035] Fig. 9 It is a schematic diagram of the structure of the sensor mounting bracket in the third embodiment.

[0036] Fig.10 It is a schematic diagram of the main cross-sectional structure of the sensor mounting bracket in the fourth embodiment.

[0037] Fig.11 It is a schematic diagram of the left view of the structure of the sensor mounting bracket in the fourth embodiment.

[0038] Fig.12 It is a schematic diagram of the top-sectional structure of the sensor mounting bracket in the fourth embodiment.

[0039] Fig.13 It is a schematic diagram of the three-dimensional structure of the sensor mounting bracket in the fourth embodiment.

[0040] In the figure: 1. cover, 2. seed tray.

[0041] 11. Seed inlet tube cavity, 12. First seeding assembly, 13. Shell, 14. Mounting tube shell, 15. First sensor assembly, 16. Second seeding assembly, 17. Seed outlet assembly, 18. Material blocking brush, 19. Cleaning outlet assembly.

[0042] 21. Plate body, 22. Positioning and installation center hole, 23. Seed suction nozzle, 24. Seed suction nozzle seat.

[0043] 131. Shell, 132. First through hole, 133. Guide plate, 134. Positioning groove, 135. Second through hole, 136. Positioning opening.

[0044] 151. First pipe joint, 152. Air flow channel, 153. Support arm, 154. Sensor mounting seat hole, 155. Guide fin, 156. First air outlet, 157. Mounting hole, 158. Connecting arm.

[0045] 171. Seed outlet, 172. Pipe joint, 173. First seat plate, 174. Seed inlet, 175. Seed inlet, 176. Second seat plate, 177. Support platform, 178. Air outlet.

[0046] 191. Cover 711. Jet hole array.

[0047] 1721. Mesh.

[0048] 1731. Wiring locating groove.

[0049] 1771. Sensor positioning slot. DETAILED DESCRIPTION

[0050] Different from the prior art, the focus of the improvement of the seeding detection device provided in the embodiment of the present invention is that two detection sensors are provided on a seeding device. For other parts of the seeding device and other parts of the hole sowing seeder except for related parts, the prior art can be adopted. Therefore, in the embodiment of the present invention, the focus is on describing the two sensors, as well as the configuration and selection of each sensor, and other parts of the seeding device and the hole sowing seeder are not described in detail.

[0051] In the embodiments of the present invention, the description of the structure or construction of the product is focused on. For example, how to use the sensor, etc., only the content related to the implementation of the present invention is described in the embodiments of the present invention, and other contents are not repeated.

[0052] The general configuration of the hole seeder is described below. As described in the background technology section, the hole seeder generally includes a frame. The frame can be equipped with independent running wheels or can be installed on other carriers.

[0053] A seed cabin is provided on the frame or the carrier on which it is configured. In addition, a number of seeders are arranged horizontally on the frame. The number of seeders is generally not less than three, but rarely exceeds ten. When there are too many seeders on a hole seeder, its flexibility will be relatively poor. A seeder can correspond to a seed cabin one by one, and multiple seeders can also share a seed cabin. The seed cabin and the seeder are generally connected by a seed delivery pipeline. Therefore, if Figure 4 As shown, the cover 1 of the seed metering device is generally provided with a seed inlet cavity 11 for communicating with the seed cabin.

[0054] Figure 3 and Figure 5 The illustrated structure is a cover 1 for a seeding device. In the embodiment of the present invention, the cover 1 is a shallow barrel-shaped structure, and its depth only needs to be sufficient to ensure that the seeding disc 2 does not interfere with the cover 1 when rotating and picking up seeds. The depth of the cover 1 may be different for different seeds. In other words, the larger the seed, the greater the depth of the cover 1. For example, for sunflower seeds, the depth of the cover 1 may be 20 mm to 65 mm.

[0055] Regarding the depth of the cover 1, it belongs to the prior art and its design basis is relatively obvious, but different hole seeding machine manufacturers may have their own considerations and design it to different depths.

[0056] The open end of the cover 1 cooperates with the base shell of the seeding device to form a seeding shell. Figure 1 The seeding disc 2 shown in the figure is located in the seeding shell, and is generally matched with a rotating seat located in the seeding shell. The seat shell seat plate is generally provided with a central hole to access the power shaft.

[0057] In addition, a vacuum chamber is formed on the side of the seed disc 2 facing away from the cover shell 1. The vacuum chamber is generally connected to a vacuum pipe joint from the base shell to connect to a vacuum device, such as a vortex blower.

[0058] Figure 3 and Figure 5 The illustrated state of the cover 1 shown in the figure is adapted to the situation where the seeding disc 2 rotates clockwise. In the figure, the material blocking brush 18 and the guide plate 133 provided in the cover 1 divide the space inside the cover 1 into two parts. Limited by the cooperation between the seeding disc 2 and the cover 1, a certain amount of accumulation will occur after the seeds enter the space between the cover 1 and the seeding disc 2 from the seed inlet cavity 11; at the same time, due to the relatively limited mobility of the seeds, the amount of accumulation of seeds in this space is not large. For the convenience of description, the space used for seed accumulation is recorded as the first space.

[0059] Figure 5 The guide plate 133 shown in the figure is an arc-shaped plate, which is generally coaxial with the enclosure 131 of the housing 1, and its central angle is generally 50°~90°. The space between the guide plate 133 and the enclosure 131 is hereinafter referred to as the second space, and the cross section of the second space perpendicular to the axial direction of the housing 1 is generally fan-shaped. It should also be noted that the second space is located at the end of the entire journey from seed picking to discharge, and the central angle of the guide plate 133 determines the main body of the end section. The corresponding initial section is used for seed picking, and the middle section is used for removing excess seeds.

[0060] The quasi-isolating member between the first space and the second space is Figure 5 The structure illustrated in the example is a material blocking brush 18, which is generally a brush. Obviously, the material blocking brush 18 is used to isolate the first space from the second space, which is a quasi-isolation state, that is, it can prevent the seeds in the seed pile in the first space from entering the second space due to gravity, but can ensure that, for example, the seed suction nozzle seat 24 passes through. It should be known that the brush also has a certain rigidity, but it is not large. Under the condition of meeting the seed shielding, for example, the seed suction nozzle seat 24 protruding from the seed plate 2 can be squeezed through the material blocking brush 18.

[0061] The seeds are squeezed through the seed suction nozzle seat 24 of the retaining brush 18 and enter the seed pile. The seed suction nozzle 23 opened on the seed suction nozzle seat 24 will suck a certain number of seeds and then pass through the seed pile, following the seeding plate 2 in the seed pile. Figure 3 In the illustrated state, the rotation is clockwise.

[0062] Since the number of seeds picked up by the seed suction nozzle 23 is uncertain, it is generally necessary to use 3 and Figure 5 The first seed removing component 12 shown in the figure removes some of the seeds adsorbed on the seed suction nozzle 23.

[0063] Figure 5A first through hole 132 is formed on the bottom plate of the middle shell 13 for installing the first seed-moving assembly 12. The first seed-moving assembly 12 is also a general configuration of the seed-moving device and will not be described in detail here.

[0064] The first seed removing assembly 12 includes a handle outside the housing 1, and the deflection angle of a cylindrical or conical spring on the first seed removing assembly 12 for removing seeds can be adjusted according to different types of seeds to remove excess seeds while avoiding removing the expected remaining seeds.

[0065] But it should also be known that Figure 3 There are two first seed removing components 12 in the illustrated structure. While controlling the seeds adsorbed on the seed suction nozzle 23 to an appropriate number, it is also possible to remove all the seeds, causing the seeds on a certain seed suction nozzle seat 24 to be removed before entering the second space, which may cause missed seeds.

[0066] In addition, if the vacuum pipe joint connected to the seed meter, the connected pipeline or the vacuum chamber of the seed meter leaks, it may also cause insufficient suction force of the seed suction nozzle 23 on the seed suction nozzle seat 24, or unstable vacuum degree of the air source, which may also cause missed seeds.

[0067] For example, if the lens of the infrared sensor is contaminated, the infrared sensor may be insufficiently sensitive, and a detection result of seeds passing through may be generated even when no seeds have passed through. In view of this, a double determination method is adopted in the embodiment of the present invention to ensure that even if the sensor generates a false detection, the "actual" missed seeding can be accurately detected.

[0068] The lower end of the cover 1 corresponding to the first space is provided with a cleaning port assembly 19, which can generally be configured as a discharge nozzle. The discharge nozzle generally has a threaded head, and a mouth cover is connected through the threaded head. After sowing is completed, the mouth cover is opened to discharge the remaining seeds.

[0069] In addition, the spacing of the seed metering devices is common knowledge in the art and depends on the crop row spacing, so it will not be elaborated here.

[0070] exist Figure 2 In the structure described above, twelve seed suction nozzle seats 24 are distributed on the seeding disc 2, and each seed suction nozzle seat 24 has two seed suction nozzles 23, which is mainly suitable for sowing two seeds in each hole. It can also be seen that the seeding disc 2 can sow twelve holes per rotation, and the sowing cycle of each hole is also determined under the condition that the rotation speed of the seeding disc 2 is determined.

[0071] Generally speaking, the traveling speed of the hole seeder is positively correlated with the rotation speed of the seeding disc 2 to ensure that the hole spacing is determined. It can be seen that the sowing cycle of each hole is determined relative to the hole seeder.

[0072] In addition, the setting of the starting point and the end point in a sowing cycle only needs to be determined. Since the length of the cycle is determined, it is not important to choose the starting point and the end point of the sowing cycle. This is common knowledge in the field and will not be repeated here.

[0073] After the sowing cycle is determined, the time when the current seed suction nozzle 23 reaches the position of the first sensor component 15 must be determined. Since the seeds will be dropped at the seed outlet component 17, the drop of the seeds will be affected by other factors, such as the dropping direction, whether it will collide with other physical parts, etc. Therefore, the time when the seeds arrive at the second sensor component often has a certain time interval, but this time interval is usually much smaller than the sowing cycle wavelength, and a time interval can be defined to ensure that the objects monitored by the first sensor component 15 and the second sensor component are the same as the detection of the same group of seeds. This can be easily determined by technicians in this field through limited experiments and will not be repeated here.

[0074] In addition, as the parts of the hole seeder that cooperate with the seeding device, it also includes a furrow opener and a soil covering and suppressing device. In most implementations, the furrow opener and the soil covering and suppressing device correspond to the seeding device one by one, wherein the furrow opener is located at the front side of the seeding device and is used to directly form holes or furrows. The soil covering and suppressing device is located at the rear side of the seeding device. After the seeds fall into the holes or furrows, the soil covering and suppressing device buries the seeds and suppresses them appropriately. This is common knowledge in the field and will not be repeated here.

[0075] Figure 2 As an example, a seeding plate 2 provided with a seeding device is generally a circular ring structure, and the number of seed suction nozzles 23 or seed suction holes opened thereon is related to the planting density of the plants, which will not be described in detail here.

[0076] In addition, if Figure 2 The one seed suction nozzle seat 24 shown in the figure has two seed suction nozzles 23, which is mainly used for the application of sowing two seeds in one hole.

[0077] The first sensor assembly includes a first detection sensor for initial confirmation of seeds, which is used for detecting when the seeds are in a state of being carried by, for example, a seed suction nozzle 23 or a suction hole.

[0078] exist Figure 3 and Figure 5 In the illustrated structure, the first detection sensor is located in the second space, essentially located Figure 3 Specifically, after the excess seeds are removed, the first seed detection can be carried out.

[0079] Figure 3 The illustrated housing 1 is Figure 3The state in is adapted to the situation where the seed disc 2 rotates clockwise. The first seed-moving component directly indicated by the number 12 is the first first seed-moving component 12. In some applications, only one first seed-moving component 12 may be provided. When two are provided, there may be some differences in the direction of seed-moving. Such configurations belong to the general common sense in the art and will not be elaborated here.

[0080] In comparison, in the prior art, a sensor for detecting seeds in a seed meter is generally only set at one place, and is generally configured at the seed outlet. In the embodiment of the present invention, it is equivalent to adding a sensor setting position. The added sensor setting position is mainly in the first space, and its position selection has been explained in other parts of the embodiment of the present invention, which will not be repeated here.

[0081] According to the previous definition, after the excess seeds are removed, the picking component for picking up the seeds enters the last section of the running path. The various stages of the running path of the picking component here are mainly divided according to function, namely the stage of picking up seeds, the stage of removing excess seeds, and the stage of seed detection and removing seeds. The middle stage of detection and removing seeds is the last section. The running path mainly corresponds to the stage corresponding to when the seeding disc 2 rotates one circle. Obviously, the seeding disc 2 is constantly rotating. Determining the running path is conducive to the determination of each stage of the running path, and the central angle corresponding to the three stages is exactly 360°, which is also conducive to the overall definition.

[0082] As mentioned above, regarding the second detection sensor, it is generally the conventional position when only one sensor is set in the prior art, and the specific position is set at the seeding port of the seeding device, such as Figure 3 On the seed outlet assembly 17 shown in .

[0083] from Figure 3 It can be seen that although the second first seed-dispensing component 12 is far away from the seed-dispensing port, that is, the entire end section is relatively long, even if there are multiple seed suction nozzles 23 between the setting position of the first detection sensor and the seed-dispensing port, it does not affect the processing of the identity of the detection objects of the first detection sensor and the second detection sensor, and technicians in this field can easily determine it based on the period and the step length between the seed suction nozzles 23.

[0084] Relatively speaking, the first detection sensor is biased as far as possible toward the side where the seeding port is located, which can reduce the amount of calculation. In a preferred embodiment, the first detection sensor only needs to be located in front of the second seeding assembly 16 used for seeding, that is, detection is performed before seeding. Correspondingly, the second detection sensor is used for detecting the seeding section after the seeds are knocked off.

[0085] In addition, in the embodiment of the present invention, the sensor mounting bracket is used for the installation of the optical sensor. The optical sensor is relatively sensitive to light obstruction. Therefore, when the probe is contaminated or blocked by dirt, false detection or missed alarm is bound to occur. In the embodiment of the present invention, compressed gas is mainly used to clean the probe of the optical sensor. Regarding the compressed gas using a real-time blowing method, a periodic pulse impact method, or a cleaning method based on the degree of contamination of the probe, technicians in this field can adapt it according to the needs of the developed product. How to adapt it has almost nothing to do with the product structure or construction of the present invention. However, it is recommended to use pulse airflow to clean the probe as much as possible.

[0086] It should be known that the seed metering device is often equipped with a negative pressure system, which is generally provided by a fan. On the seeding disc 2 of the seed metering device, there is often a group of suction nozzles (also called suction ports, seed suction ports or seed suction nozzles 23) in a circular array. When the current seed suction nozzle 23 runs to the seeding port, it is pushed off the suction nozzle and enters the seeding port. When the seed is located on the seed suction nozzle 23, its state is relatively stable, so when it runs to the seeding port, its position is also basically fixed, so a single sensor can be used for detection. When the seed falls at the seeding port, it basically falls freely, and the falling trajectory is relatively random, and often requires a group of sensors for detection. In the embodiment of the present invention, two types of sensor mounting brackets are provided, one of which is Figure 6~Figure 9 The sensor mounting bracket shown is used to install a set of sensors, and the other is Figure 10~Figure 13 The sensor mounting bracket shown in the example is used for mounting a single sensor, and the sensor assembly with a single sensor is constituted as follows Figure 3 The first sensor assembly 15 shown in the figure is used to detect objects with relatively simple detection difficulty.

[0087] It should be noted that the embodiments of the present invention do not involve the selection of optical sensors, but can be understood as the cleaning of known optical sensors. In addition, regarding cleaning, it is not necessary to clean the entire structure of the optical sensor. Based on the purpose of the present invention, the object to be cleaned is more easily determined to be the lens part of the optical sensor (the light exit window or incident window).

[0088] At the same time, it should be known that the optical sensor suitable for the seed meter is mainly an optical sensor including a light source and a detector, wherein the light source is also called the transmitting end, and the detector is also called the receiving end. The transmitting end and the receiving end of the optical sensor suitable for the seed meter are generally arranged in a corresponding manner, and the object to be detected passes through the space between the receiving end and the transmitting end.

[0089] The light source, that is, the transmitting end, mostly uses light-emitting diodes, laser diodes, infrared emitting diodes, etc. These light sources are focused by optical elements such as lenses or light, so that the accurate light path can be determined, and the receiving end is set on this light path. The space passed by the corresponding object to be detected is often passed by the light path. For example, when a seed passes through this space, the light path is temporarily blocked, and the receiving end cannot receive the light and sends out a switch quantity.

[0090] The receiving end is generally equipped with a photosensitive element, such as a photoresistor, a phototransistor, a photocell, etc., and can also be configured as an image sensor in some high-value applications. The compatibility of the receiving end and the transmitting end is common knowledge in the field and will not be elaborated here. However, as mentioned above, the light from the transmitting end is generally output in a relatively thin beam, so the probe area that needs to be cleaned, whether it is the receiving end or the transmitting end, does not need to be too large. In other words, the main part of the probe that is cleaned using, for example, pulsed airflow is the light output or input, such as the lens part.

[0091] It is true that it is better to clean the rest of the sensor, such as the packaging part, the wiring part, etc., to reduce the impact on heat dissipation, etc. However, it can be further known that when using, for example, pulsed airflow to clean the probe, the airflow impact does not need to cover a large area.

[0092] Regarding the probe, it is represented as the transmitting end and the receiving end in the present invention, which generally has a packaging body containing a transparent part, wherein the transparent part includes the aforementioned lens, for example. This part is the focus of cleaning, and the rest of the probe does not need to be cleaned.

[0093] In the foregoing content, it is explained that there are two main types of sensor mounting brackets based on the embodiments of the present invention, which can be applied to different scenarios. Figure 6~Figure 9 The structure of the example is described below, which is referred to as the first type; the other type is Figure 10~Figure 13 The structure of the example is illustrated, hereinafter referred to as the second category. Based on the previous description of the two types of sensor mounting brackets, the first category is mainly used to detect objects passing through in a relatively free manner, and the second category is mainly used to detect objects passing through in a relatively stable manner.

[0094] The following describes the first type of sensor mounting bracket. Figure 6~Figure 9 In the illustrated structure, the bracket body for installing the sensor is a tube-shell structure, but it should be known that for the seeding device, it has a seeding port, and the bracket body of the tube-shell structure is usually installed at a predetermined position of the seeding port to construct the seeding port. It can also be known that if the seeding port is constructed by the shell of the seeding device, then the part of the shell of the seeding device located at the seeding port can constitute the bracket body.

[0095] Based on the foregoing description, it can be known that the first type of sensor mounting bracket is used to install multiple optical sensors. Therefore, the sensor mounting portion provided therein includes multiple sensor mounting positions. The number of sensor mounting positions depends on the size of the seed opening. Obviously, the number of sensors should be sufficient to avoid missed detection as a basic condition, which can be easily determined by technicians in this field based on this.

[0096] Obviously, since different types of seeds have different sizes, the size requirements for the seed opening will also be different. Therefore, there is no uniform requirement for the number of sensors, and the corresponding technical requirement is the coverage range of all the aforementioned sensors.

[0097] Meanwhile, it should be noted that in the embodiments of the present invention, emphasis is placed on cleaning of the sensor rather than arrangement of the sensor. In other words, arrangement of the sensor may be understood as known technical content herein.

[0098] also, Figure 6 In order to adapt the second air outlet 178 for cleaning, it is necessary to consider the structure or construction of the bracket body itself, as well as technical conditions such as the layout of the sensor. These technical conditions will affect the arrangement of the air outlet, but it can also be understood that if the entire sensor mounting bracket is designed as a whole under the condition of being configured with the second air outlet 178, the bracket body needs to be adjusted to match the position of the second air outlet 178. Such adjustments indicate that the second air outlet 178 constitutes the basis for the design of the bracket body. In other words, in an embodiment of the present invention, the second air outlet 178 and its accompanying structure or construction will also cause changes to the bracket body.

[0099] exist Figure 7 and Figure 8 In the illustrated structure, the second air outlet 178 is a functional part for cleaning the probe. Fig. 9 In the illustrated structure, the jet hole array 17711 constitutes a functional part for cleaning the probe. For the convenience of description, the jet hole array 17711 is referred to as a hole group, and the hole group and the second air outlet 178 are collectively referred to as a cleaning unit hereinafter.

[0100] From the perspective of position, the gas blown by the cleaning unit should be directed directly to the probe, especially the lens part of the probe used for emitting or incident light.

[0101] Regarding the configuration of the second air outlet 178 and the hole group in the cleaning unit, they can be directly molded on the bracket body, such as Fig. 9 The jet hole array 17711 shown in the figure can be directly formed when the bracket body is formed by injection molding or 3D printing, or it can be configured on a given tube body.

[0102] In addition, the molding may be, for example, injection molding as described above, or after the bracket body is molded, holes may be formed by machining, for example, drilling.

[0103] Regarding the structure of the pipe body on the bracket body, it can be integrally formed with the bracket body, or it can be a pipe installed on the bracket body later. Such construction methods are common knowledge in the relevant field and will not be described in detail here.

[0104] In addition, for the example where there is a first air outlet 156 or a second air outlet 178, the support body generally needs to be equipped with a flow channel. The flow channel can be directly connected to an external pipeline, or the flow channel can be equipped with a second pipe joint 172 that is integrally formed with the support body for matching the pipeline.

[0105] In some implementations, the second air outlet 178 is, for example, formed on the bracket body, and the corresponding flow channel is also formed on the bracket body. The inlet end of the flow channel is tapped to form a threaded hole, which can be directly connected to a threaded joint.

[0106] Regarding the flow channel, it can be a hole or a cavity, such as Fig. 9 The jet hole array 17711 shown in the figure, the part adapted to be connected to the second pipe joint 172 in the bracket body can be a cavity or a channel. When configured as a channel, the jet hole arrays 17711 located on the same side are connected through the channel.

[0107] exist Fig. 9 In the illustrated structure, each of the jet hole arrays 17711 on both sides is equipped with a second pipe joint 172. In some embodiments, the jet hole arrays 17711 on both sides may be equipped with only one second pipe joint 172. When only one second pipe joint 172 is equipped, the lumen or channel for connecting the jet hole arrays 17711 on the same side is connected to the second pipe joint 172.

[0108] Figures 6 to 9 The second pipe joint 172 is mainly used for the access of compressed gas. A through hole corresponding to the second pipe joint 172 is opened on the shell of the corresponding seed metering device. The main body of the bracket is accommodated in the shell of the seed metering device and is disengaged from the seeding disc, and can also be in contact with it to have a sliding friction or rolling friction relationship.

[0109] Figure 10~Figure 13 The structure of the second type of sensor mounting bracket exemplified is simpler than that of the first type of sensor mounting bracket. As mentioned above, the seed meter generally sucks the seeds through a suction hole or a suction nozzle, and the position of the suction hole or the suction nozzle is fixed. When the seeds are adsorbed by the suction hole or the suction nozzle, the axial position of the seeds on the seed meter is fixed. Therefore, for the second type of sensor mounting bracket, in principle, installing one sensor can meet the detection requirements, but the possibility of installing two or more sensors is not ruled out.

[0110] Relative to Figures 6 to 9 In the case where the sensor mounting bracket body is in the form of a shell and tube, Figure 10~Figure 13 The main body of the bracket body of the second type of sensor illustrated is generally U-shaped, and considering the configuration of the first pipe joint 151, it can be H-shaped. Figure 5 As a variation of the illustrated structure, if the two first pipe joints 151 are combined into one, the one first pipe joint 151 is simultaneously connected to the two flow passages 152 shown in the figure through a connecting channel opened on, for example, the connecting arm 158.

[0111] Figure 10~Figure 13 The bracket body of the illustrated second type of sensor mounting bracket has a pair of support plates 153, and the two support plates 153 are arranged in parallel. When the bracket body is installed on the seed meter, the extension direction of the support plates 153 is parallel to the axial direction of the seed meter.

[0112] The second type of sensor mounting bracket is suitable for the installation of detection sensors when the seeds are in the state of being adsorbed by the suction holes or nozzles on the seeding disc. As mentioned above, in this state, the movement trajectory of the seeds is basically determined in the axial direction of the seeding device, which is suitable for the detection of a single sensor. The optical path of the single sensor is roughly consistent with the radial direction of the seeding device or at an angle of no more than 30°.

[0113] One end of the two support plates 153 is the installation end of the sensor, and the other end can introduce airflow. Therefore, the support plate 153 has an air flow channel 152 set in the extension direction of the arm body, and a first air outlet 156 is provided at one end of the support plate 153, and an air inlet is provided at the other end. Obviously, the first air outlet 156 and the air inlet also constitute the two ends of the air flow channel 152.

[0114] The end of the support plate 153 with the air inlet may be directly formed with a first pipe joint 151, and the extension direction of the first pipe joint 151 is consistent with the extension direction of the support plate 153. As mentioned above, the two support plates 153 may share one first pipe joint 151, and the corresponding two air passages 152 may be connected through a transverse air passage (i.e., the aforementioned connecting passage) opened in, for example, the connecting arm 158.

[0115] Fig.10 In the embodiment, the connecting arm 158 also forms a seat of the support frame and can be fixed to the housing of the seed meter by means of screws, for example.

[0116] Correspondingly, the sensor is installed at the end where the second air outlet 156 of the second type sensor mounting bracket is located. At this time, the second air outlet 156 directly hits the sensor probe and is used for cleaning the sensor probe.

[0117] exist Figure 10~Figure 13In the illustrated structure, a sensor mounting hole 154 is provided at the end of the support plate 153 where the second air outlet 156 is located, and the optical path direction of the installed sensor is perpendicular to the blowing direction of the second air outlet 156 .

[0118] For the convenience of description, in the embodiment where the bracket body is mainly composed of the support plate 153, in order to distinguish the orientation, the end where the second air outlet 156 is located is called the air outlet end of the support plate 153, which can also be simply called the air outlet end, and the other end is the air inlet end, which can also be simply called the air inlet end.

[0119] The first type of sensor mounting bracket and the second type of sensor mounting bracket are adapted with a first air outlet 156, a second air outlet 178 or a hole group. For example, the blowing direction of the second air outlet 178 or the hole group is roughly perpendicular to the optical path direction of the sensor, so as to be used for cleaning the sensor probe, thereby reducing false alarms or missed detections caused by the sensor lens being blocked by dirt.

[0120] The bracket body of the first type of sensor mounting bracket preferably adopts a tube shell structure. Figure 6~Figure 9 This is more clearly reflected in the exemplified structure.

[0121] The bracket body adopts a tube-shell structure, which can directly form the seed outlet of the seed meter. Figure 6 The state shown is roughly the installation state of the support body on the seed metering device, and the seeds enter from the seed inlet 175 shown in the figure and are discharged from the seed outlet 171 shown in the figure. The upper and middle part of the support body shown in the figure is a bucket-shaped structure, so that the support body of the tube shell structure is in a state of gradually closing in the upper and lower directions, which is conducive to making the seeds fall into the predetermined holes more easily.

[0122] In addition, due to the closing, the seed outlet 171 shown in the figure is relatively small, and relatively few sensors can be arranged to still meet the detection of seeds passing through the support body of the tube shell structure. Specifically, the sensor is arranged at the seed outlet 171.

[0123] A single-side buckle, for example, may be provided at the seed outlet 171, and the seed outlet 171 may be mounted on the remaining mounting seat hole of the seed metering device by buckling.

[0124] In order to more clearly show the seed outlet 171, the sensor installed on the housing portion of the tube shell structure that determines the seed outlet 171, and the state of the second pipe joint 172, Figure 7~Figure 9 The illustrated sensor mounting bracket is shown generally in an inverted position.

[0125] See also Figure 7~Figure 9The second type of sensor mounting bracket shown has a cross-section of the tube shell portion that determines the seed outlet 171 to be roughly rectangular, but it can also be other shapes, such as two curved panels connected at both ends, or two area panels connected at both ends using flat plates, or the seed outlet 171 is a circular outlet.

[0126] Regardless of the structural form of the seed outlet 171, the transmitter and receiver of the sensor need to be set up on two opposite sides. It should be known that even a circular outlet does not affect the understanding of the two sides, especially for the transmitter and receiver, whose optical path determines their installation method, that is, the transmitter and receiver need to be strictly aligned, based on which the "two sides" can be determined.

[0127] Furthermore, based on the structural form of the aforementioned seed outlet 171, the arrangement of the transmitting end and the arrangement of the receiving end can be two straight line arrangements or two arc arrangements, but no matter which arrangement is used, the optical paths of several sensors should be as parallel as possible in order to obtain a relatively large coverage range under the condition of the same number of sensor configurations.

[0128] If the sensor is arranged in two arcs, the middle distance between the two arcs is the farthest. This state is easiest to understand with the circular seed outlet 171. One of the two arcs is located on one side of the circular seed outlet 171, and the other is located on the other side of the seed outlet 171. At this time, based on the reasonable coverage of the optical path, the two arcs are symmetrical about a middle surface of the seed outlet 171. Obviously, the distance between the two arcs in the middle is the farthest.

[0129] If two straight line arrangements are used, the two straight line arrangements are parallel.

[0130] It is easy to understand that if two arrangements are used, one arrangement is a transmitting end arrangement and the other arrangement is a receiving end arrangement.

[0131] Furthermore, if the sensor is arranged in two straight lines, there are two options for configuring the second air outlets 178 or the hole groups. One option is that the second air outlets 178 correspond to the straight line arrangements one by one, that is, there are also two second air outlets 178, and one arrangement corresponds to one second air outlet 178, which presents Figure 7 and Figure 8 The structure of the example is also shown in Figure 8 In the illustrated structure, a mesh 1721 is provided at the second air outlet 178 to disperse the airflow. Specifically, in a linear arrangement, the sensor probe far from the second air outlet 178 will be blocked by the sensor probe close to the second air outlet 178, affecting the cleaning effect, and the presence of the mesh 1721 will cause a certain amount of airflow dispersion, which is conducive to part of the airflow crossing the probe relatively close to the second air outlet 178 and being used to clean the probe relatively far from the second air outlet 178.

[0132] from Figure 7 and Figure 8 As can be seen from the figure, in terms of positional relationship, the second air outlet 178 is located at one end of the linearly arranged, for example, emitting end array, and rushes toward the other end of the emitting end array.

[0133] Fig. 9 Another form is shown, in which the second air outlet 178 or the jet hole array 17711 is directly opened at the bottom of the sensor positioning groove 1771 shown in the figure. Under this condition, the second air outlet 178 or the jet hole array 17711 corresponds to the probe one by one, and there will be no mutual obstruction between the probes.

[0134] If two arc arrangements are used, they can be arranged as follows Fig. 9 The configuration shown in the figure, that is, the second air outlet 178 or the hole group corresponds to the installation position one by one, and is located on the side of the installation position corresponding to the sensor, which is the side where the main body of the bracket body is located, so as to facilitate the formation of a cavity or a channel, thereby facilitating the construction of a connecting channel between the second air outlet 178 or the hole group and the second pipe joint 172.

[0135] exist Figure 7~Figure 9 In the illustrated structure, the mounting position is configured as a protection portion and a mounting base portion. The sensor positioning groove 1771 with an arc-shaped portion shown in the figure is mainly used to protect the sensor probe, and the portion on the back side of the sensor in the sensor installation state is configured as follows: Figures 7-9 The mounting substrate shown in the figure, such as the first seat plate 3 shown in the figure.

[0136] The first seat plate 3 can be opened as Fig.10 The sensor mounting seat hole 154 shown in the figure may also only have a wiring positioning groove 1731 for bending and adjusting the sensor lead wire, and further a threading hole may be opened. After the sensor lead wire passes through the threading hole, the threading hole may be sealed with, for example, hot melt adhesive to fix the sensor lead wire.

[0137] The sensor positioning groove 1771 is an arc-shaped groove portion, and the axis of the arc-shaped groove portion is parallel to or consistent with the extension direction of the sensor probe.

[0138] Regarding the groove type and size of the sensor positioning groove 1771, compare Figure 7 The structure and Fig. 9 The structure of the example, Figure 7 The middle sensor positioning slot 1771 is relatively short, mainly to allow the airflow to be blown from one end of the probe arrangement, and it is necessary to avoid the state where the probe or at least the lens is blocked in this direction. Fig. 9 In the illustrated structure, the sensor positioning groove 1771 is relatively long, and only the protection and positioning of the sensor need to be considered, and there will be no obstruction to, for example, the air jet hole array 17711 opened at the bottom of the groove.

[0139] Fig. 9 The jet hole array 17711 shown in the figure located at the bottom of the sensor positioning groove 1771 has three rows and three columns of jet holes, which can better clean the probe. If a single second air outlet 178 is used, the diameter of the single second air outlet 178 should be much larger than the aperture of the single jet hole. If the number of jet holes is 9, the cross-sectional area of ​​the single second air outlet 178 should be 1.5 to 2 times the cross-sectional area of ​​the 9 jet holes.

[0140] Based on the above description, it can be known that if the second air outlet 178 or the hole group is located at one end of the linear arrangement, for example, the sensor positioning groove 1771 with an arc-shaped groove portion is omitted or part of the groove wall is omitted from the end where the second air outlet 178 or the hole group is located to expose the head end of the sensor probe.

[0141] In addition, if the second air outlet 178 or hole group is located at one end of the linear arrangement, the second air outlet 178 or hole group is located on the corresponding tube body, such as Figure 7 Or on the second pipe joint 172 on the sensor mounting bracket shown in 8.

[0142] If a single tube fits into a hole group, the hole group can be composed of Figure 8 The mesh 1721 illustrated in FIG.

[0143] exist Fig.10 It can be seen from the illustrated structure that the air outlet end of the second type of sensor mounting bracket presents a step structure. For the convenience of description, the concept of a step is used to describe the structure of the air outlet end.

[0144] Accordingly, Fig.10 In the illustrated structure, the side away from the two mounting positions is the back plate, which also constitutes the corresponding part of the step riser, or the part providing the riser, and is used as the sensor mounting seat plate. In the preferred embodiment, the back plate is provided with a sensor mounting seat hole 154.

[0145] Accordingly, Fig.10 In the embodiment, the first air outlet 156 is correspondingly located on the tread of the step structure, so that the probe connected from the kick surface is directly hit by the first air outlet 156.

[0146] exist Figure 5 As can be seen from the illustrated structure, a guide fin 155 is provided on the kick surface of the step structure. The guide fin 155 is located between the sensor and the tread so as to deflect part of the airflow directly blowing the sensor toward the sensor probe side, thereby improving the cleaning ability.

[0147] Based on the aforementioned positional relationship, a better configuration can be further determined as follows: the airflow channel 152 is perpendicular to the probe of the sensor, and the radial extension of the guide fin 155 in the airflow channel 152 is equal to the radius of the airflow channel 152, that is, a portion of the second air outlet 156 is shielded, part of the airflow directly blows the probe of the sensor, and part of the airflow is changed in direction, which has a better cleaning effect on the probe as a whole.

[0148] Due to airflow interference, the aforementioned direct blowing of part of the airflow cannot be achieved, but based on such interference, the airflow can be made turbulent, which can produce a better cleaning effect.

[0149] Furthermore, the included angle between the guide fin 155 and the axis of the air flow channel 152 is 30° to 60°.

[0150] The sensor assembly, in the embodiment of the present invention, refers to an assembly formed by assembling a sensor on a sensor mounting bracket.

[0151] One first type sensor bracket and one second type sensor bracket can be installed on one seeding device. A seeding machine usually has several seeding devices, and the distance between the seeding devices is the spacing between plants, that is, the ridge width.

[0152] Regarding the seeding detection method in the embodiment of the present invention, it is mainly applicable to the aforementioned seeding detection device to perform seeding detection on the seeding device, and the core of the corresponding detection method is: when the first detection sensor and the second detection sensor both detect seeds within one detection cycle, it is recorded as normal sowing in the current hole, otherwise the sowing in the current hole is recorded as failure and marked as missed sowing; the ratio of the missed sowing number to the expected sowing number is recorded as the missed sowing rate, and if the missed sowing rate within the predetermined time period is equal to or higher than the preset missed sowing rate, an alarm signal is generated.

[0153] The alarm is mainly made by a loudspeaker. In addition, in the device for seeding detection, as a conventional configuration, it is generally equipped with control elements such as a single-chip microcomputer, human-machine interaction devices such as a touch screen, and a memory. In some implementations, it is also equipped with several LEDs for status indication. Therefore, an indicator light can also be used to indicate the alarm, such as a designated indicator light flashing. The touch screen can also be used as an output device for the alarm signal.

[0154] Regarding data storage, it can include the sowing situation of each row (corresponding to the corresponding seed meter), or the overall sowing situation. Missed sowing can be a reflection of the overall sowing situation, or a missed sowing situation can be stored and displayed for each row.

[0155] In addition, some implementations also include a step of eliminating false positives, which is: The current moment when the current seed reaches the first detection sensor and the detection window at the current speed are determined based on the rotation speed of the seeding disc 2, and the detection information reported in the time period other than the current detection window in the current detection cycle is eliminated. It should be noted that if the sensor is cleaned by, for example, compressed air, such false alarms will be relatively rare.

Claims

1. A seeding detection device, used for seeding detection of a seeding device of a hole sowing seeder, characterized in that: The seeding detection device comprises: The first detection sensor is arranged on the housing of the seed metering device and is located at the end of the running path of the picking component of the seeding disc of the seed metering device for picking up seeds; The second detection sensor is arranged at the seed discharge port of the seed discharger; When the first detection sensor and the second detection sensor both detect seeds within one detection cycle, it is recorded that the sowing of the current hole is normal; otherwise, it is recorded that the sowing of the current hole fails.

2. The seeding detection device according to claim 1, characterized in that: The first detection sensor is located at the rear side of the second seed removing component for removing seeds corresponding to the end section.

3. The seeding detection device according to claim 1, characterized in that: The first detection sensor and the second detection sensor are both optical sensors. The first detection sensor is included in a first sensor assembly, and the second detection sensor is included in a second sensor assembly. The first sensor assembly and the second sensor assembly both include a sensor mounting bracket, and the sensor mounting bracket includes: The bracket body has a sensor mounting portion; The air outlet or hole group is formed on the support body or arranged on a given tube body. Correspondingly, if arranged on the tube body, the tube body is mounted on the support body or is an integral structure with the support body; The air outlet or hole group is opposite to the sensor installed at the sensor mounting portion.

4. The seeding detection device according to claim 3, characterized in that: The bracket body included in the second sensor assembly is a tube housing structure, one end of the tube housing is an inlet, and the other end is an outlet, and the corresponding outlet end constitutes a second detection sensor installation part; A group of mounting positions are respectively arranged on two opposite sides of the outlet end, wherein the mounting positions on one side are used to mount the transmitting end of the optical sensor, and the mounting positions on the other side are used to mount the receiving end of the optical sensor.

5. The seeding detection device according to claim 4, characterized in that: The arrangement of the transmitting end and the arrangement of the receiving end are arranged in two straight lines or in two arcs; If there are two arcs, the distance between the two arcs is the farthest; If there are two straight line arrangements, the two straight line arrangements are parallel.

6. The seeding detection device according to claim 5, characterized in that: If there are two linear arrangements, the air outlets or hole groups correspond one to one with the linear arrangements and are located at one end of the linear arrangements respectively so as to face the other end of the corresponding linear arrangements; or The air outlets or hole groups correspond to the installation positions one by one and are located on a side of the installation position corresponding to the second detection sensor; If there are two arc-shaped arrangements, the air outlets or hole groups correspond to the installation positions one by one and are located on a side of the installation position corresponding to the second detection sensor.

7. The seeding detection device according to claim 6, characterized in that: The mounting position has: an arc-shaped groove portion, the axis of which is parallel to or consistent with the extension direction of the sensor probe of the second detection sensor; A back mounting seat, correspondingly located at the back side of the sensor probe, for mounting the sensor probe; If the air outlet or hole group corresponds to the installation position one by one, the air outlet or hole group is opened at the bottom of the arc-shaped groove; If the air outlet or hole group is located at one end of the linear arrangement, the arcuate groove portion is omitted or a portion of the groove wall is omitted from the end where the air outlet or hole group is located to expose the head end of the sensor probe.

8. The seeding detection device according to claim 6 or 7, characterized in that: If the air outlet or hole group is located at one end of the linear arrangement, the air outlet or hole group is located on the corresponding tube body.

9. The seeding detection device according to claim 4, characterized in that: The inlet portion of the tube shell forms a bucket-shaped structure, and at the bucket-shaped structure, the flow cross section gradually decreases in the direction from the inlet to the outlet.

10. The seeding detection device according to claim 3, characterized in that: Adapted to the first detection sensor, the sensor mounting bracket comprises: A pair of support arms are provided, and the two corresponding support arms are arranged in parallel, and the support arms have an air flow channel arranged in the extending direction of the arm body, and an air outlet is provided at one end of the support arm, and an air inlet is provided at the other end, wherein a mounting position for mounting a first detection sensor is provided at the air outlet, and the air outlet is correspondingly located at one side of the mounting position, so that the corresponding first detection sensor is flushed by the air outlet; The connecting arm is used for connecting the two supporting arms in the middle or at the air inlet end of the supporting arms.

11. The seeding detection device according to claim 10, characterized in that: The side of the two mounting positions away from each other is a back plate, which is used as a mounting base plate of the first detection sensor, so that the support arm forms a step structure at the air outlet end; The air outlet is correspondingly located on the tread of the step structure.

12. The seeding detection device according to claim 11, characterized in that: A guide fin is provided on the kick surface of the step structure, and the guide fin is located between the first detection sensor and the tread surface, so as to deflect part of the airflow directly blowing the first detection sensor toward the first detection sensor probe side.

13. The seeding detection device according to claim 12, characterized in that: The airflow channel is perpendicular to the probe of the first detection sensor, and the extension amount of the guide fin in the radial direction of the airflow channel is the radius of the airflow channel; The included angle between the guide fin and the axis of the air flow channel is 30°~60°.

14. A seed metering device, characterized in that: It comprises the seeding detection device as described in any one of claims 1 to 13.

15. A hole seeding machine, characterized in that: The invention comprises a frame and a plurality of seed metering devices according to claim 14 which are arranged transversely on the frame.

16. A seeding detection method, characterized in that: The seeding detection device according to any one of claims 1 to 13 is used to detect seeding on a seeding device, and the seeding detection method comprises: When the first detection sensor and the second detection sensor both detect seeds within one detection cycle, it is recorded that the current hole is sown normally, otherwise it is recorded that the current hole is sown unsuccessfully and marked as missed sowing; The ratio of the number of missed sowings to the expected number of sowings is recorded as the missed sowing rate. If the missed sowing rate within a predetermined time period is equal to or higher than the preset missed sowing rate, an alarm signal is generated.

17. The detection method according to claim 16, characterized in that: The step of eliminating false positives is also included, and the step of eliminating false positives is: The current time when the current seed reaches the first detection sensor and the detection window at the current rotation speed are determined according to the rotation speed of the seeding disc, and the detection information reported in the time period other than the current detection window in the current detection cycle is discarded.

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