Spraying device

Abstract

To provide a spraying device capable of spraying spray objects such as solid fertilizers or pesticides that have different shapes in proper amounts to proper locations.SOLUTION: A spraying device 1 includes: a hopper 2 that stores solid fertilizers H having different shapes; a cylindrical cylinder 3 that has an input port of the fertilizers H delivered from the hopper 2 on the side face part thereof; a screw 4 that is housed in the cylindrical inner part of the cylinder 3 and rotates in the circumferential direction of the cylinder 3 to compress the fertilizers H; a first motor 5 that rotates the screw 4 in the circumferential direction of the cylinder 3; an extrusion unit 6 that is positioned at the tip part of the cylinder 3 for extruding the fertilizers H compressed by the screw 4 in a predetermined shape; a reception unit 9 that receives concentration distribution information 21 including information on the concentration distribution of the fertilizers H in a farm field; and a drive control unit 25 that controls the rotational speed of the first motor 5 on the basis of the concentration distribution information 21 received by the reception unit 9.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a spraying device for spraying a spray object in a farm field. [Background technology]

[0002] As a technique for spreading a material to be spread while traveling through a field, for example, a sprayer as shown in Patent Document 1 is known. Patent Document 1 discloses that a sprayer for spreading granular or particulate material over a surface includes a dual rotor configuration, a material deflection system, and a portable electronic device holder, the material deflection system includes components for deflecting the material spread by each of the rotors, and the sprayer includes a walking speed indicator to inform the user whether the current speed is too fast, too slow, or within an acceptable standard range.

[0003] In addition, as a technique for spraying while adjusting the amount of spraying on the target, for example, the techniques shown in Patent Documents 2 to 4 are disclosed. Patent Document 2, for example, discloses a process in which an area in the soil where it is estimated that there are few soil bacteria is specified, and livestock manure is sprayed on the specified area in order to increase the soil bacteria (

[0004] ), in particular, the location where spraying is required, the substance that needs to be sprayed, the amount that needs to be sprayed, etc. are calculated and the above processing is performed (

[0005] ) has been disclosed.

[0004] Patent document 3 discloses a technology for a control device that controls current agricultural machinery that fertilizes agricultural produce while moving over a field, and that includes a growth data receiving unit that obtains data by sensing the growth status of the agricultural produce in each part of the field, a fertilizer amount calculation unit that determines the amount of fertilizer to be applied based on this growth data, and a speed signal generating unit that generates a speed signal for causing the machinery to travel at a speed that corresponds to the difference in the amount of fertilizer to be applied to each part of the field.

[0005] Patent document 4 discloses a work vehicle that includes a planting unit that is attached to a traveling body and plants seedlings in a field, a position information acquisition device that acquires position information of the traveling body, an information storage terminal that stores the position information and associates and stores the position information, past work information, and information on the field condition, and a control unit that raises and lowers the planting unit based on the information on the field condition stored in the information storage terminal. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Special Publication No. 2020-508065 [Patent Document 2] Patent Publication No. 2021-193894 [Patent Document 3] JP 2019-41729 A [Patent Document 4] JP 2017-153410 A Summary of the Invention [Problem to be solved by the invention]

[0007] The technologies shown in Patent Documents 1 to 4 all include technical content for adjusting the amount of a target substance such as fertilizer or pesticide to be sprayed, but since the size, hardness, and weight per unit volume of a solid target substance vary depending on the manufacturer and type, it is very difficult to spray the appropriate amount in the appropriate location. In other words, since the above parameters vary for each target substance used, the range and amount of spraying are not uniform, and there is a problem that these technologies are not sufficient to spray the appropriate amount of the target substance in the appropriate location.

[0008] In addition, it is ideal to be able to adjust the duration of the effect of the spray target depending on the crop being grown and the harvest time (for example, if the period until harvest is long, the effect of the spray target will last longer, and if the period until harvest is short, the effect will be sustained with a minimum amount of spray target). However, the techniques shown in Patent Documents 1 to 4 have the problem that they cannot adjust the duration of the effect of the spray target.

[0009] The present invention has been made to solve the above-mentioned problems, and aims to provide a spraying device that can spray solid objects having multiple different shapes in appropriate locations in appropriate amounts. [Means for solving the problem]

[0010] The spraying device of the present invention comprises a storage section for storing solid spray objects having a plurality of different shapes, a cylindrical cylinder having an inlet on its side for the spray objects to be discharged from the storage section, a pressing section stored inside the cylinder and compressing the spray objects fed into the cylinder while pushing them in, a prime mover for driving the pressing section from at least the base end side to the tip end side of the cylinder, a pushing section located at the tip end of the cylinder for pushing out the spray objects compressed by the pressing section in a predetermined shape, a receiving means for receiving concentration distribution information including information on the concentration distribution of the spray objects in a field, and a drive control means for controlling the drive state of the prime mover based on the concentration distribution information received by the receiving means.

[0011] In this way, the spraying device of the present invention includes a storage section that stores solid spray objects having a plurality of different shapes, a cylindrical cylinder having an inlet for the spray objects to be discharged from the storage section on the side, a pressing section that compresses the spray objects fed into the cylinder while pushing them in, a prime mover that drives the pressing section from at least the base end side to the tip end side of the cylinder, a pushing section that is located at the tip end of the cylinder and pushes out the spray objects compressed by the pressing section in a predetermined shape, a receiving means that receives concentration distribution information including information on the concentration distribution of the spray objects in the field, and a drive control means that controls the drive state of the prime mover based on the concentration distribution information received by the receiving means.Therefore, even when spraying objects of various sizes and shapes, etc., the effect is achieved that the desired amount of spray objects can be sprayed in the desired area by compressing them to a uniform size and shape by the pressing section. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram showing a configuration of a sprinkling device according to a first embodiment. [Diagram 2] FIG. 2 is a functional block diagram showing the configuration of a control unit in the sprinkling device according to the first embodiment. [Diagram 3] FIG. 6 is a schematic diagram showing the configuration of a sprinkling device according to a second embodiment. [Figure 4] FIG. 11 is a functional block diagram showing the configuration of a control unit in a sprinkling device according to a second embodiment. [Diagram 5] FIG. 13 is a schematic diagram showing the configuration of a spraying device according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] (First embodiment of the present invention) The spraying device according to this embodiment will be described with reference to Figures 1 and 2. The spraying device according to this embodiment is used by being attached to, for example, an agricultural tractor, and sprays the spray target in the optimal amount in the optimal area according to the condition of the field.

[0014] In the following embodiment, a case where fertilizer is used as the spray target is described, but the spraying device according to this embodiment can be applied to other solid spray targets such as pesticides. In the following embodiment, a configuration in which the spraying device is attached to a tractor traveling in a farm field and sprayed from the ground is described, but the spraying device according to this embodiment can also be applied to cases where the spraying device is attached to a drone and sprayed from the sky, or where the spraying device is used underground in a farm field with a construction machine or tractor when forming a waterway for culvert drainage.

[0015] Fig. 1 is a schematic diagram showing the configuration of the spraying device according to the present embodiment. In Fig. 1, the spraying device 1 includes a hopper 2 (an example of a storage unit) that stores fertilizer H (an example of a spray target), a cylindrical cylinder 3 having an inlet for feeding the fertilizer H stored in the hopper 2, a screw 4 (an example of a pressing unit) that is stored in the cylinder 3 and rotates in the circumferential direction of the cylinder 3 to compress the fertilizer H in the cylinder 3, a first motor 5 (an example of a prime mover) for rotating the screw 4 in the circumferential direction of the cylinder 3, an extrusion unit 6 that is provided at the tip of the cylinder 3 and extrudes the fertilizer H compressed by the screw 4 in a predetermined shape, a connection mechanism 7 for mechanically and electrically connecting with the tractor T, a stand 8 for fixing the spraying device 1 to the tractor T, a receiving unit 9 that receives concentration distribution information including information on the concentration distribution of the fertilizer H in the field, and a control unit 10 that controls the rotation speed (rotation speed per unit time) of the first motor 5 based on the received concentration distribution information.

[0016] As described above, the object to be sprayed may include agricultural chemicals in addition to the fertilizer H. Also, the storage part may be any container other than the hopper 2, such as a tank, that can store the object to be sprayed and deliver it to the cylinder 3. Furthermore, a piston may be used as the pressing part in addition to the screw 4. Furthermore, an electric motor, a hydraulic motor, an engine, or the like may be used as the prime mover.

[0017] The spraying device 1 is connected to the front, rear or side of an agricultural vehicle such as a tractor T via a connection mechanism 7 and is used in a fixed state by a stand 8. In addition, by electrically connecting with a power cable 7a included in the connection mechanism 7, it is possible to supply power from the tractor T to the spraying device 1. Note that the driving energy of the spraying device 1 does not necessarily need to be obtained from the tractor T, and may be configured to be connected to a power source mounted on the tractor T as a separate unit.

[0018] Solid fertilizer H of various shapes and sizes is fed into the hopper 2. Because the shapes and sizes of solid fertilizer H vary depending on the manufacturer, it is difficult to spread the correct amount of fertilizer H in the correct area of ​​the field in this state. Therefore, the fertilizer H is first fed into the hopper 2, and the shape and size of the fertilizer H is standardized using the cylinder 3 and screw 4, which will be described later.

[0019] The solid fertilizer H stored in the hopper 2 is fed into the cylinder 3 through an inlet formed on the side of the cylinder 3. The cylinder 3 contains a screw 4, and the fed solid fertilizer H is compressed by being pressed against the extrusion section 6 by the rotating blades 4a formed in a spiral shape along the side of the rotation shaft of the screw 4 as the screw 4 rotates. The extrusion section 6 having a through hole 6a formed, for example, with a predetermined shape such as a notch, cutout, or mesh is disposed at the tip of the cylinder 3 into which the fed solid fertilizer H is pushed. The compressed fertilizer H is extruded from the through hole 6a of the extrusion section 6 according to the rotation speed of the screw 4 while being molded according to the shape of the through hole 6a. The size of the through hole 6a can be changed by replacing the extrusion section 6 itself or by configuring it to have a slide mechanism, and the compression rate of the fertilizer H can be adjusted according to the size of the through hole 6a.

[0020] A first motor 5 is installed at the base end of the screw 4, which is driven by power supplied from the tractor T and rotates the screw 4. The first motor 5 can rotate in both positive and negative directions, but in this case, the positive rotation causes the rotating blades 4a of the screw 4 to push the solid fertilizer H toward the extrusion section 6. As described above, the amount of fertilizer H (compressed and molded fertilizer H) extruded from the extrusion section 6 per unit time varies depending on the rotation speed of the screw 4. In other words, if the rotation speed of the screw 4 is increased, the amount of fertilizer H extruded per unit time increases, and if the rotation speed of the screw 4 is decreased, the amount of fertilizer H extruded per unit time decreases. In other words, by adjusting the rotation speed of the screw 4, it is possible to adjust the amount of fertilizer H to be spread.

[0021] The rotation speed of the first motor 5 is controlled by the control unit 10. The control unit 10 calculates how much fertilizer H to spread and in which area of ​​the field based on concentration distribution information including information on the concentration distribution of fertilizer H in the field received by the receiving unit 9, and drives and controls the first motor 5 according to the calculation result. Here, the configuration of the control unit 10 will be described.

[0022] Fig. 2 is a functional block diagram showing the configuration of the control unit in the spraying device according to this embodiment. In Fig. 2, the control unit 10 includes a receiving unit 9 that receives the concentration distribution information 21 and position information 22 indicating the current location of the spraying device 1, a calculation unit 24 that calculates how much amount of fertilizer H to spray in which area of ​​the farm field based on the received concentration distribution information 21, and a drive control unit 25 that drives the rotation speed of the first motor 5 based on the calculation result of the calculation unit 24 and the position information 22 of the spraying device 1.

[0023] The concentration distribution information 21 is, for example, map information showing the distribution of fertilizer H in a farm field, and can be acquired by a known technology developed by the inventor (Reference 1: JP 2022-054131 A, “Soil Diagnosis System”). The technology related to Reference 1 is a technology that measures gas emitted from the soil using a gas sensor such as an odor sensor, and calculates the distribution of the soil condition and the concentration of fertilizer H. The receiving unit 9 receives information showing the concentration distribution of fertilizer H calculated by this soil diagnosis system as concentration distribution information 21.

[0024] The position information 22 may be obtained, for example, from a GPS installed in the tractor T, or may be obtained by applying known technology (Reference 2: JP 2022-064131 A, “Geomagnetic Detection Device and Geomagnetic Detection Program”). The technology related to Reference 2 supports the straight-line movement of a vehicle such as a tractor by accurately detecting geomagnetism, but it may also be possible to calculate the position in the field to which the tractor T is moving based on information from the acceleration sensor and geomagnetic sensor used here.

[0025] The calculation unit 24 calculates the area where fertilizer H is required and the amount of fertilizer H based on the information of the concentration distribution information 21. For example, when it is desired to make the concentration of fertilizer H uniform over the entire field, a calculation is performed based on the information of the concentration distribution information 21 to spread a larger amount of fertilizer H in the area where the concentration of fertilizer H is low, and to spread a smaller amount of fertilizer H or not spread at all in the area where the concentration of fertilizer H is high. Also, for example, when a plurality of crops are grown in the field, the amount of fertilizer H to be spread is calculated so that the concentration of fertilizer H is appropriate according to the type of crop. Information on the appropriate amount of fertilizer H may be registered in advance in a memory in the control unit 10, or may be received from the outside together with the concentration distribution information 21. In any case, the calculation unit 24 calculates the amount of fertilizer H to be spread in which area of ​​the field, and obtains a distribution of the amount of fertilizer H to be spread.

[0026] The drive control unit 25 generates a signal for controlling the number of revolutions of the first motor 5 based on the distribution of the amount of fertilizer H calculated by the calculation unit 24, and drives the first motor 5. As described above, the faster the number of revolutions of the first motor 5, the faster the screw 4 is rotated to push out more fertilizer H per unit time, and the slower the number of revolutions of the first motor 5, the slower the screw 4 is rotated to push out less amount of fertilizer H per unit time. That is, the drive control unit 25 specifies the current location of the spraying device 1 from the position information 22 received by the receiving unit 9, specifies the amount of fertilizer H to be spread at the current location from the amount of fertilizer H to be spread for each area of ​​the field calculated by the calculation unit 24, and drives the first motor 5 to the number of revolutions corresponding to the amount of fertilizer H to be spread. At this time, when the tractor T is moving, the number of revolutions of the first motor 5 is controlled taking into consideration the moving speed. That is, when the tractor T is moving at high speed, the time to spread the fertilizer H in that area cannot be secured very much, so the amount of fertilizer H to be spread is secured by increasing the number of revolutions of the first motor 5. Conversely, when the tractor T is moving at a low speed, there is a relatively large amount of time to spread the fertilizer H in that area, so the rotation speed of the first motor 5 is reduced to ensure an appropriate amount of fertilizer H is spread.

[0027] By controlling the rotation speed of the first motor 5 by the control unit 10 as described above, it is possible to spread an appropriate amount of fertilizer H in an appropriate area based on the concentration distribution information 21.

[0028] Thus, the spraying device 1 according to this embodiment includes a hopper 2 that stores solid fertilizer H having a plurality of different shapes, a cylindrical cylinder 3 having an inlet for the fertilizer H discharged from the hopper 2 on the side, a screw 4 that is stored inside the cylinder 3 and rotates in the circumferential direction of the cylinder 3 to compress the fertilizer H, a first motor 5 that rotates the screw 4 in the circumferential direction of the cylinder 3, an extrusion unit 6 that is located at the tip of the cylinder 3 and extrudes the fertilizer H compressed by the screw 4 in a predetermined shape, a receiving unit 9 that receives concentration distribution information 21 including information on the concentration distribution of the fertilizer H in the field, and a drive control unit 25 that controls the rotation speed of the first motor 5 based on the concentration distribution information 21 received by the receiving unit 9. Therefore, even when fertilizers H of various sizes and shapes are used, the fertilizers H can be compressed by the screw 4 to a uniform size and shape, and a desired amount of fertilizer H can be sprayed in a desired area.

[0029] Furthermore, since it is possible to extrude fertilizer H of a uniform shape and size from the extrusion section 6, it is possible to spray an appropriate amount of fertilizer H by controlling the rotation speed of the first motor 5 that drives the screw 4 based on concentration distribution information 21 that indicates the fertilizer distribution in the field.

[0030] In particular, it is possible to carry out environmentally friendly work by spreading fertilizer in an amount that takes into consideration the impact on the environment of the chemical substances (such as nitrogen and phosphates) contained in Fertilizer H (for example, the impact of seeping into groundwater and causing water pollution). At the same time, it is also possible to comply with legal regulations regarding accurate labeling of Fertilizer H and the amount used.

[0031] (Second embodiment of the present invention) The spraying device according to this embodiment will be described with reference to Figures 3 and 4. The spraying device according to this embodiment is an extension of the function of the spraying device according to the first embodiment, and can change the particle size of the fertilizer H to be sprayed according to the harvest season, etc. In this embodiment, the description that overlaps with the first embodiment will be omitted.

[0032] FIG. 3 is a schematic diagram showing the configuration of the spraying device according to this embodiment. FIG. 3(A) is a diagram showing the overall configuration of the spraying device 1, and FIG. 3(B) is a diagram showing the configuration of the crushing unit 11. The spraying device 1 in FIG. 3 is configured to include a crushing unit 11 having a rotary crushing wing 13 at the tip of the extrusion unit 6 and a second motor 12 for rotating the crushing wing 13 at the center of the crushing wing 13 in the spraying device 1 shown in FIG. The second motor 12 is electrically connected so that its driving power can be obtained from the tractor T, similar to the first motor 5, but may be configured to be connected to a power source mounted on the tractor T as a separate unit. In addition to controlling the rotation speed of the first motor 5, the control unit 10 also controls the rotation speed of the second motor 12.

[0033] In FIG. 3, the fertilizer H molded and extruded from the extrusion unit 6 is crushed by the rotation of the crushing blade 13, and the degree of crushing can be adjusted according to the rotation speed of the crushing blade 13, i.e., the rotation speed of the second motor 12 (the number of rotations per unit time). Specifically, when the rotation speed of the second motor 12 increases, the rotation speed of the crushing blade 13 increases, and the fertilizer H extruded from the extrusion unit 6 is finely crushed so that the particle size of each particle becomes small. When the rotation speed of the second motor 12 decreases, the rotation speed of the crushing blade 13 decreases, and the fertilizer H extruded from the extrusion unit 6 is coarsely crushed so that the particle size of each particle becomes large. In other words, it is possible to adjust the particle size of the fertilizer H to be spread by the rotation speed of the second motor 12.

[0034] Here, the particle size of fertilizer H will be explained. The duration of the effect of fertilizer H varies depending on its particle size. Specifically, if the particle size is large, the effect lasts longer, and if the particle size is small, the effect lasts shorter. Therefore, considering the impact on the environment as described above, it is desirable to adjust the appropriate amount of fertilizer to be applied so that the effect continues during the crop growth period and is adjusted so that the effect wears off at the time of harvest.

[0035] As described in the first embodiment, the spraying device 1 of this embodiment controls the amount of fertilizer H to be sprayed by controlling the rotation speed of the first motor 5, and further controls the particle size of the fertilizer H to be sprayed by controlling the rotation speed of the second motor 12, making it possible to spray an appropriate amount of fertilizer H with an appropriate particle size in an appropriate area in the field.

[0036] Regarding the appropriate particle size of the fertilizer H, information regarding the appropriate value may be included in the concentration distribution information 21, or the calculation unit 24 may calculate it based on the agricultural crop distribution information 26 described later.

[0037] The control of the rotation speed of the second motor 12 by the control unit 10 will be described. Fig. 4 is a functional block diagram showing the configuration of the control unit in the spraying device according to this embodiment. In Fig. 4, the configuration of the control unit 10 is the same as that in Fig. 2, but the receiving unit 9 receives agricultural crop distribution information 26 including information on the harvest time of the agricultural crop to be grown in addition to the concentration distribution information 21 and the position information 22, the calculation unit 24 calculates the particle size of the fertilizer H to be sprayed based on the agricultural crop distribution information 26, and the drive control unit 25 controls the first motor 5 and the second motor 12 based on the result of calculation by the calculation unit 24.

[0038] That is, the crop distribution information 26 includes distribution information of the crops in the field and information on the harvest time of each crop, and the calculation unit 24 performs a calculation to make the particle size of the fertilizer H smaller in areas where crops with earlier harvest times (shorter growth periods) are grown, and to make the particle size of the fertilizer H larger in areas where crops with later harvest times (longer growth periods) are grown. From the results of this calculation, it is possible to determine the distribution of particle size of the fertilizer H according to the distribution of the crops (distribution showing what types of crops are grown in which areas of the field).

[0039] The drive control unit 25 controls the rotation speed of the first motor 5 based on the distribution of the amount of fertilizer H as described in the first embodiment, and also controls the rotation speed of the second motor 12 based on the distribution of the particle size of the fertilizer H described above. That is, when the current location of the spraying device 1 obtained from the position information 22 is an area where crops with an early harvest season are grown, the rotation speed of the second motor 12 is increased to reduce the particle size of the fertilizer H to be sprayed, and the duration of the effect is adjusted to be shorter in accordance with the harvest season. On the other hand, when the current location of the spraying device 1 obtained from the position information 22 is an area where crops with a late harvest season are grown, the rotation speed of the second motor 12 is decreased to increase the particle size of the fertilizer H to be sprayed, and the duration of the effect is adjusted to be longer.

[0040] The combination of the amount of fertilizer H to be sprayed and its particle size is as shown in the table below. The calculation unit 24 determines the optimal combination from the combinations in the table below depending on the condition of the field before spraying the fertilizer H and the crops to be grown, etc., and the drive control unit 25 accordingly controls the drive of the first motor 5 and the second motor 12 at the optimal rotation speed.

[0041] [Table 1]

[0042] The immediate / delayed action of fertilizers and pesticides can also be adjusted by the concentration of their components. That is, when the cross-sectional area of ​​the through-hole 6a of the extrusion section 6 is reduced, the compression rate of the fertilizer H by the screw 4 increases, so that the components are concentrated and extruded from the extrusion section 6. In this case, since the components are concentrated, the active components of the fertilizer H gradually penetrate into the soil, resulting in delayed action. Conversely, when the cross-sectional area of ​​the through-hole 6a is increased, the compression rate of the fertilizer H by the screw 4 decreases, so that the components of the fertilizer H are not concentrated and have a normal component density, resulting in a relatively high immediate action. The cross-sectional area of ​​the through-hole 6a can be adjusted by changing the size of the hole by replacing the extrusion section 6 or using a slide mechanism, as described above in the first embodiment. Regarding the sliding mechanism, for example, two flat plates with multiple holes of the same size in the same positions are stacked, and when the positions of the holes are perfectly aligned, the cross-sectional area of ​​the through hole 6a is maximized, and when only one of the flat plates is rotated and slid by a third motor or the like to shift the positions of the respective holes, the cross-sectional area of ​​the through hole 6a can be reduced. In other words, it is possible to control the size of the cross-sectional area of ​​the through hole 6a by changing the rotation angle at which one of the flat plates is rotated.

[0043] For this reason, by adding the rotation angle of the third motor, which adjusts the cross-sectional area of ​​the through hole 6a, as a parameter to Table 1 above, it is possible to more precisely adjust the spraying of fertilizer H, taking into account its immediate / delayed effect.

[0044] In this manner, the spraying device of this embodiment is provided with a crushing blade 13 that is disposed outside the extrusion section 6, rotates coaxially with the rotation axis of the screw 4, and crushes the fertilizer H extruded from the extrusion section 6, and a second motor 12 that rotates the crushing blade 13. The control section 10 controls the rotation speed of the second motor based on the concentration distribution information 21, so that the degree of crushing can be adjusted for the fertilizer H extruded from the extrusion section 6 in a uniform size and shape so that the fertilizer H has the desired particle size.

[0045] In addition, the receiving unit 9 receives crop distribution information 26 including distribution information indicating the distribution of crops grown in the field and the harvest time of the crops, and the control unit 10 calculates the particle size of fertilizer H based on the crop distribution information 26 and controls the rotation speed of the second motor 12 so that the particle size of the fertilizer H to be sprayed becomes the calculated particle size. Therefore, the size of the fertilizer H to be sprayed can be adjusted according to the harvest time of the crop, i.e., according to the period for which the effect of the fertilizer H is desired to be maintained, and an appropriate amount of fertilizer H in an appropriate size can be sprayed according to the crop.

[0046] Other embodiments of the present invention The spraying device according to this embodiment will be described with reference to FIG. 5. The spraying device 1 shown in FIG. 5 is an expanded version of the spraying device 1 according to the first or second embodiment. In FIG. 5(A), the spraying device 1 includes a heating section 14 near the tip of the outer periphery of the cylinder 3. That is, by compressing the solid fertilizer H fed from the hopper 2 while heating it with the heating section 14, the shape of the fertilizer H after compression can be maintained and the compression rate can be increased. By increasing the compression rate of the fertilizer H, the components can be concentrated further, enabling the effectiveness to be maintained for a long time.

[0047] 5(B), the spraying device 1 includes a hydration section 15 at a portion preceding the heating section 14. That is, the hydration section 15 adds moisture to the solid fertilizer H to facilitate solidification, and the fertilizer H is then compressed while being heated by the heating section 14, thereby solidifying the fertilizer H more reliably.

[0048] In addition, in Figure 5, the configuration of the spraying device 1 according to the first embodiment (Figure 1) is shown as being equipped with a heating unit 14 and a hydration unit 15, but the configuration of the spraying device 1 according to the second embodiment (Figure 3) may also be shown as being equipped with a heating unit 14 and a hydration unit 15.

[0049] In this way, by providing a heating section 14 and / or a hydration section 15 for heating the fertilizer H in the cylinder 3, the fertilizer H can be heated and / or hydrated when compressed by the screw 4, and thus the desired size and shape can be maintained and made uniform when extruded from the extrusion section 6.

[0050] Furthermore, in another embodiment, in the spraying device 1, the concentration distribution information 21 may include information on the use restrictions of fertilizer H and / or information on the appropriate spray amount of fertilizer H based on information on the area of ​​use. In this case, the calculation unit 24 calculates the amount of fertilizer H to be sprayed using the information on the use restrictions of fertilizer H as an upper limit, thereby making it possible to comply with, for example, legal regulations regarding the amount of use. Furthermore, since it becomes possible to spray fertilizer based on the appropriate spray amount of fertilizer H based on information on the area of ​​use, it becomes possible to spray an appropriate amount of fertilizer for each area (for example, for each regional characteristic such as hours of sunshine, amount of rainfall, temperature, humidity, etc.). [Explanation of symbols]

[0051] H fertilizer, solid fertilizer T Tractor 1 Spraying device 2. Hopper 3 Cylinder 4 Screw 4a Rotating blade 5 First Motor 6 Extrusion section 6a Through hole 7 Attachment 7a power cable 8 Mounting stand 9 Receiving section 10 Control section 11 Crushing section 12 Second motor 13 Crushing Feather 14 Heating section 15 Water Addition Section 21 Concentration distribution information 22 Location information 24 Arithmetic section 25 Drive control unit 26 Crop distribution information

Claims

1. A storage section for storing solid objects to be dispersed having a plurality of different shapes; A cylindrical cylinder having an inlet for the object to be sprayed that is delivered from the storage section on a side surface thereof; A pressing part that is stored inside the cylinder and compresses the object to be sprayed that is placed in the cylinder while pressing it; A prime mover that drives the pressing portion from at least a base end side to a tip end side of the cylinder; An extrusion section located at the tip of the cylinder for extruding the object to be dispersed compressed by the pressing section in a predetermined shape; A receiving means for receiving concentration distribution information including information on the concentration distribution of the target substance in a field; a drive control means for controlling a drive state of the prime mover based on the concentration distribution information received by the receiving means.

2. The spraying device according to claim 1, A crushing section that is disposed outside the extrusion section, rotates coaxially with the cylinder, and crushes the object to be dispersed that is extruded from the extrusion section; A motor for rotating the crushing unit, A spraying device, characterized in that the drive control means controls the number of rotations of the motor based on the concentration distribution information.

3. The spraying device according to claim 1 or 2, A spraying device characterized by comprising a heating means for heating the object to be sprayed within the cylinder.

4. The spraying device according to claim 2, The receiving means receives agricultural crop distribution information including distribution information indicating a distribution of agricultural crops grown in the farm field and a harvest time of the agricultural crops, A spraying device characterized in that the drive control means calculates the particle size of the object to be sprayed based on the crop distribution information, and controls the rotation speed of the motor so that the particle size of the object to be sprayed becomes the calculated particle size.

5. The spraying device according to claim 1 or 2, A spraying device characterized in that the concentration distribution information includes information on appropriate spray amounts of the spray object based on information on restrictions on use of the spray object and / or information on the area of ​​use.

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