JP2022081555A - Map information generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a map information generation system capable of generating map information for improving quality of work support.

SOLUTION: A map information generation system acquires positional information on a work vehicle, identifies plow pan depth information using a posture of a work device provided behind the work vehicle, and generates map information corresponding to the positional information and the plow pan depth information.

SELECTED DRAWING: Figure 6

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a map information generation system.

The following Patent Document 1 describes a technique for generating a field unevenness data map (map information) based on latitude / longitude information and altitude information detected hourly by a GPS device provided in the center of a work vehicle in the vehicle width direction. It has been disclosed.

Japanese Unexamined Patent Publication No. 2004-008187

In Patent Document 1, the height at the center of the work vehicle in the vehicle width direction is acquired by the GPS device, but it is not detected in which direction the work vehicle is tilted when viewed from the traveling direction. Therefore, it is not possible to generate a detailed unevenness data map of the points where the latitude / longitude information is detected in the field.
The field may consist of a surface layer and a tillage board located below the surface layer. The plowing depth, which is the distance between the surface of the surface layer and the surface of the plowing board, is important in field work because it affects the growth of crops and work efficiency. However, in Patent Document 1, although the unevenness data can be acquired, the information about the depth of the tillage board cannot be acquired.

Therefore, a main object of the present invention is to provide a map information generation system capable of generating map information that improves the quality of work support.

In one embodiment of the present invention, the position information of the work vehicle is acquired, the plow depth information is specified by the posture of the work device provided behind the work vehicle, and the position information and the plow depth information are used. It provides a map information generation system that generates map information corresponding to the above.

According to this configuration, it is possible to generate map information having tillage depth information. This makes it possible to improve the quality of work support.

In the above configuration, the work vehicle is a tractor, and the tillage depth information is specified from the attitude control information of the tractor machine and the attitude control information of the rotary that can be raised and lowered behind the tractor machine. good.

In the above configuration, the work vehicle is a rice transplanter, and the cultivated board depth information includes the attitude control information of the rice transplanter machine and the attitude control information of the planting portion that can be raised and lowered behind the rice transplanter machine. May be specified from.

FIG. 1 is a schematic diagram showing a configuration of a work support system and a map information generation system according to an embodiment of the present invention. FIG. 2 is a side view of the combine as a first work vehicle used in the map information generation system. FIG. 3 is a plan view of the combine. FIG. 4 is a block diagram showing the electrical configuration of the combine. FIG. 5 is a schematic view of the combine traveling in the field when viewed from the traveling direction. FIG. 6 shows an example of map information generated by the map information generation system. FIG. 7 is a side view of the tractor as the first work vehicle. FIG. 8 is a plan view of the tractor. FIG. 9 is a block diagram showing the electrical configuration of the tractor. FIG. 10 is a schematic view of the tractor traveling in the field when viewed from the traveling direction. FIG. 11 is a side view of the rice transplanter as the first work vehicle. FIG. 12 is a plan view of the rice transplanter. FIG. 13 is a block diagram showing the electrical configuration of the rice transplanter. FIG. 14 is a schematic diagram showing a notification target position and a notification position specified in the map information. FIG. 15 is a flowchart showing an example of notification processing by the work support system. FIG. 16 is a flowchart showing an example of the ascending / descending range limiting process by the work support system. FIG. 17 is a schematic diagram showing an example of a traveling route generated by the work support system. FIG. 18A is a schematic diagram for explaining the elevating control at the standard control position of the second working unit provided in the second working vehicle. FIG. 18B is a schematic diagram for explaining the elevating control at the insensitivity control position of the second working unit. FIG. 18C is a schematic diagram for explaining the elevating control at the insensitivity control position of the second working unit. FIG. 19 is a flowchart showing an example of elevating control processing by the work support system.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram showing a configuration of a map information generation system 1 and a work support system 2 according to an embodiment of the present invention. The map information generation system 1 is a system that creates map information based on the information acquired by the first work vehicle 3 having an information acquisition function. The work support system 2 is a system that supports various works of the second work vehicle 4 in the field based on the map information generated by the map information generation system 1.

The work vehicles 3 and 4 can communicate with the management server 6 via the information communication network 5. Further, the work vehicles 3 and 4 and the management server 6 can wirelessly communicate with the wireless communication terminal 7 on which various information for work support is displayed.
As the work vehicles 3 and 4, for example, agricultural work vehicles such as combines, tractors, and rice transplanters are used. The work vehicles 3 and 4 may be common work vehicles (for example, both tractors) or different work vehicles (for example, one is a combine and the other is a tractor).

Hereinafter, the map information generation system 1 and the work support system 2 that generate map information based on the information acquired by the first work vehicle 3 and utilize the map information for various work support will be described. Here, a case where the first work vehicle 3 is a combine will be described as an example.
FIG. 2 is a side view of the combine 8 as the first work vehicle 3. FIG. 3 is a plan view of the combine 8.

The combine 8 includes a machine base 11, an engine 12, a threshing device 13, a grain tank 14, a boarding operation unit 15, a discharge auger 16, a cutting unit 17, and a pair of traveling units 18. The engine 12 supplies power to each part of the combine 8. The cutting unit 17 cuts the culm grown in the field F. The threshing device 13 threshes the culm cut by the cutting unit 17. The grain tank 14 stores threshed grains. The discharge auger 16 transports the threshed grains in order to discharge the threshed grains in the grain tank 14 to the outside of the combine 8.

The boarding operation unit 15 includes a driver's seat 15A for the user to board, a steering handle 15B for steering the combine 8, and various operation units 34 (see FIG. 4) for operating the combine 8. It is prepared. The machine base 11 is a frame that supports the engine 12, the cutting unit 17, the discharge auger 16, the threshing device 13, the grain tank 14, and the boarding operation unit 15.

A lifting cylinder 43 (see FIG. 4) for raising and lowering the cutting section 17 is connected to the cutting section 17. The cutting section 17 is located near the front end of the machine base 11. The cutting unit 17 includes a cutting blade 17A for cutting the grain culms grown in the field F, and a transport path (not shown) for transporting the grain culms cut by the cutting blade 17A to the threshing device 13. The cutting section 17 is raised and lowered around a predetermined rotation center by the raising and lowering cylinder 43.

The pair of traveling portions 18 are arranged at predetermined intervals from each other in the vehicle width direction WD of the combine 8. The pair of traveling units 18 support the machine base 11, the engine 12, the cutting unit 17, the discharge auger 16, the threshing device 13, the Glen tank 14, and the boarding operation unit 15. The machine base 11, the engine 12, the discharge auger 16, the threshing device 13, the Glen tank 14, and the boarding operation unit 15 are collectively referred to as the machine unit 19. The cutting section 17 is an example of a first working section supported by the machine section 19 (first machine section). The vehicle width direction WD is also the width direction of the machine body portion 19.

Although only one of the pair of traveling portions 18 is shown in FIG. 2, each traveling portion 18 is crawlered via a crawler frame 20 extending in the front-rear direction of the combine 8 and a crawler arm (not shown). It includes a plurality of wheels 21 supported by the frame 20, a drive sprocket 22 to which the driving force from the engine 12 is transmitted, and a crawler 23 wound around the plurality of wheels 21 and the drive sprocket 22.

Each traveling unit 18 is provided with a vehicle height cylinder 41 (see FIG. 4). Each vehicle height cylinder 41 expands and contracts the corresponding crawler 23 in the height direction HD (direction orthogonal to the vehicle width direction WD) of the machine body portion 19 by raising and lowering the corresponding crawler frame 20 with respect to the machine base 11. Let me.
The pair of vehicle height cylinders 41 adjust the height and inclination of the machine body portion 19 by separately raising and lowering the pair of crawler frames 20. For example, even if the heights of the ground contact surfaces on which the crawler 23 touches each other are different in the field F, by raising and lowering the vehicle height cylinder 41 separately, the machine body portion 19 is horizontal when viewed from the traveling direction of the combine 8. The inclination of the machine body portion 19 can be controlled so as to be.

When the combine 8 travels in the field, the lower end of the crawler 23 sinks to the height of the tillage board located below the upper surface (field surface) of the surface layer of the field. A tillage board is a layer formed by soil that is harder than the surface layer.
FIG. 4 is a block diagram showing the electrical configuration of the combine 8. With reference to FIG. 4, the combine 8 includes a control unit 30 for controlling the operation of each unit provided in the combine 8.

The position information acquisition unit 31 is electrically connected to the control unit 30. The positioning signal received by the satellite signal receiving antenna 32 is input to the position information acquisition unit 31. The satellite signal receiving antenna 32 receives signals from positioning satellites constituting a satellite positioning system (GNSS: Global Navigation Satellite System).
The position information acquisition unit 31 calculates the position information of the combine 8 (strictly speaking, the satellite signal receiving antenna 32) as latitude / longitude / altitude information, for example. The satellite signal receiving antenna 32 is located substantially in the center of the vehicle width direction WD. The position information acquisition unit 31 acquires the position information of the combine 8 every second, for example.

A communication unit 33 is electrically connected to the control unit 30. As an example, the communication unit 33 may be configured by a wireless LAN router (Wi-Fi router). The operation unit 34 is electrically connected to the control unit 30.
Each of a plurality of controllers for controlling each unit of the combine 8 is electrically connected to the control unit 30. The plurality of controllers include an engine controller 35, a crawler drive mechanism controller 36, a vehicle height controller 37, and an elevating controller 38.

The engine controller 35 is electrically connected to a common rail device 39 as a fuel injection device provided in the engine 12. The common rail device 39 injects fuel into each cylinder of the engine 12. The engine controller 35 controls the rotation speed of the engine 12 and the like by controlling the common rail device 39. By controlling the common rail device 39, the engine controller 35 can also stop the supply of fuel to the engine 12 and stop the driving of the engine 12.

The crawler drive mechanism 40 that transmits the drive force from the engine 12 to the pair of drive sprockets 22 is electrically connected to the crawler drive mechanism controller 36. The crawler drive mechanism 40 can drive a pair of crawlers 23 separately. By driving the pair of crawlers 23 separately, the combine 8 can turn.
A pair of vehicle height cylinders 41 are electrically connected to the vehicle height controller 37. In connection with the vehicle height cylinder 41, the control unit 30 is electrically equipped with a vehicle height sensor 42 for detecting the vertical distance between the lower end of the corresponding crawler 23 and the reference position provided on the machine body unit 19. Is connected. The vehicle height sensor 42 is, for example, a potentiometer that detects the position of the cylinder rod of the vehicle height cylinder 41.

An elevating cylinder 43 is electrically connected to the elevating controller 38. In connection with the elevating cylinder 43, a cutting height sensor 44 for detecting the vertical distance between the reference position provided on the machine body 19 and the cutting blade 17A is electrically connected to the control unit 30. There is. The cutting height sensor 44 is, for example, a potentiometer or the like that detects the position of the cylinder rod of the elevating cylinder 43.

The elevating controller 38 controls the elevating cylinder 43 based on the detection result of the cutting height sensor 44. Specifically, the elevating controller 38 controls the elevating cylinder 43 so that the cutting blade 17A of the cutting unit 17 is located above the field surface FS of the field F by a predetermined distance.
An inertial measurement unit 45 is electrically connected to the control unit 30. The inertial measurement unit 45 is a sensor unit capable of specifying the attitude (direction of the machine base 11), acceleration, and the like of the combine 8. Specifically, the inertial measurement unit 45 includes a sensor group in which an angular velocity sensor and an acceleration sensor are attached to each of the first axis, the second axis, and the third axis orthogonal to each other.

More specifically, the inertial measurement device 45 includes a first acceleration sensor that detects acceleration in the first axis direction, a second acceleration sensor that detects acceleration in the second axis direction, and a second acceleration sensor that detects acceleration in the third axis direction. Three acceleration sensors, a first angular velocity sensor that detects the angular velocity around the first axis, a second angular velocity sensor that detects the angular velocity around the second axis, and a third angular velocity that detects the angular velocity around the third axis. Equipped with a sensor.

The movements around the first axis, the second axis, and the third axis are called pitching, yawing, and rolling, respectively.
The control unit 30 includes a microcomputer provided with a CPU and a memory (ROM, RAM, etc.). The microcomputer functions as a plurality of functional processing units by executing a predetermined program stored in the memory (ROM). Examples of the functional processing unit include a tillage distance acquisition unit 50, a surface layer distance acquisition unit 51, a tillage depth specifying unit 52, and a map information generation unit 53.

FIG. 5 is a schematic view of the combine 8 traveling in the field F when viewed from the traveling direction. When the combine 8 travels in the field F, the lower end of the crawler 23 sinks to the height of the tiller TL located below the upper surface (field surface) of the surface layer SL of the field F. The plowing board TL is a layer formed by soil that is harder than the surface layer SL. As shown in FIG. 5, the height of the tillage board TL may differ between one side and the other side in the vehicle width direction WD. Even in such a case, the posture of the machine body portion 19 is maintained in the horizontal posture by expanding and contracting the pair of crawlers 23.

The tillage distance acquisition unit 50 acquires the tillage distances H1 and H2 based on the detection results of each vehicle height sensor 42. The cultivated distance H1 on one side of the vehicle width direction WD is a contact between the horizontal plane HS passing through a predetermined reference position S set in the machine body portion 19 and the crawler 23 on one side of the vehicle width direction WD touching the cultivated plate TL. It is a vertical distance from the point C1 (ground plane). The cultivated distance H2 on the other side of the vehicle width direction WD is the vertical distance between the horizontal plane HS and the grounding point C2 (grounding surface) on which the crawler 23 on the other side of the vehicle width direction WD touches the cultivated plate TL. Is.

The surface layer distance acquisition unit 51 acquires the surface layer distance h based on the detection result of the cutting height sensor 44. Specifically, the surface layer distance h is a predetermined distance A1 from the field surface FS detected by the cutting height sensor 44 to the cutting blade 17A, and a distance A2 between the cutting blade 17A set by the user and the reference position S. It corresponds to the sum (h = A1 + A2).
The tillage depth specifying portion 52 determines the tillage depth D1 (one-side tillage depth) of the field F on one side of the vehicle width direction WD based on the tillage distances H1 and H2 and the surface layer distance h. The depth D2 of the tillage board of the field F (the depth of the tillage board on the other side) on the other side of the vehicle width direction WD is specified. The one-side tillage depth D1 corresponds to the difference between the one-side tillage distance H1 in the vehicle width direction WD and the surface layer distance h (D1 = H1-h). The plowing board depth D2 on the other side corresponds to the difference between the plowing board distance H2 on the other side in the vehicle width direction WD and the surface layer distance h (D2 = H2-h).

When the combine 8 finishes traveling in the entire area of the field F, the position information at each specific point in the field F is acquired by the position information acquisition unit 31, and a plurality of plow depth information (cultivation) at each specific point in the field F is acquired. The board depths D1 and D2) are specified by the cultivated board depth specifying unit 52.
The sampling interval of the tillage depth information acquired by the tillage depth specifying unit 52 may be different from the sampling interval of the position information acquired by the position information acquisition unit 31 (for example, 1 second interval). .. The specific point is the point where both the plowing depth information and the position information are acquired.

In this way, the plow depth specifying unit 52 uses the attitude control information of the machine unit 19 at the specific point (the detection result of the vehicle height sensor 42 and the detection result of the inertial measurement unit 45) and the raising and lowering of the cutting unit 17 at the specific point. The plow depths D1 and D2 are specified based on the control information (detection result of the cutting height sensor 44).
The map information generation unit 53 includes latitude / longitude information at each specific point in the field F acquired by the position information acquisition unit 31, and a tillage board at each specific point in the field F specified by the tillage depth specifying unit 52. Generates map information associated with depth.

FIG. 6 shows an example of map information generated by the map information generation unit 53. In FIG. 6, for convenience of explanation, the traveling direction of the combine 8 traveling in the field F is indicated by an arrow of a two-dot chain line, but the map information does not include this arrow. In the map information, the field F is divided for each predetermined area R including each specific point P for which the position information is acquired in the field F, and each of the map information is according to the cultivated depth information acquired at each specific point P. It is a map in which identification information (color or numerical value) is attached to the area R. The map information shown in FIG. 6 shows an example in which shades of color are used as identification information.

When the center of the body of the combine 8 passes through the specific point P, each area R is divided into two in the vehicle width direction WD corresponding to each installation position of the pair of traveling portions 18 centering on the point P. The portion R1 on one side of the vehicle width direction WD of each region R is provided with identification information according to the one-side tillage depth D1, and the portion R2 on the other side of the vehicle width direction WD of each region R is on the other side. Identification information according to the plowing depth D2 is attached. In this way, in the map information, a plurality of tillage depth information at the specific point P is displayed so as to be distinguishable from each other. In the map information shown in FIG. 6, the colors of the portions R1 and R2 having a large plowing depth are darkened.

With reference to FIG. 4, a storage unit 55 is connected to the control unit 30. The storage unit 55 is composed of a storage device such as a hard disk and a non-volatile memory. The storage unit 55 stores the position information storage unit 56 that stores the position information of the combine 8 and the cultivated board depths D1 and D2 at each specific point P in the field F specified by the cultivated board depth specifying unit 52. It includes a plow depth storage unit 57 and a map information storage unit 58 that stores map information generated by the map information generation unit 53.

When the first work vehicle 3 is a combine 8, a plurality of plow depth information (plow depths D1 and D2) is obtained based on the attitude control information of the machine unit 19 and the elevating control information of the cutting unit 17 at the specific point P. ) Is specified. That is, the detailed tillage depth can be obtained.
Therefore, by associating the latitude / longitude information of the combine 8 at the specific point P with the plurality of tillage depth information, it is possible to generate map information having detailed tillage depths D1 and D2 at the specific point P. .. This makes it possible to improve the quality of work support.

Further, the plurality of tillage depth information includes the tillage depth information at the points (grounding points C1 and C2) where the pair of traveling portions 18 arranged at predetermined intervals in the vehicle width direction WD touches the ground. .. That is, the tillage depth information is acquired at two points in the vehicle width direction WD. Therefore, it is possible to generate map information having detailed tillage depth information at a specific point P.
Further, the pair of traveling portions 18 of the combine 8 can be expanded and contracted in the vertical direction so that the machine body portion 19 maintains a horizontal posture. Therefore, the plowing depths D1 and D2 can be accurately specified regardless of the uneven shape of the surface of the field F on which the combine 8 travels.

In the map information, in addition to the latitude / longitude information and the tillage depths D1 and D2, the altitude information at each specific point P in the field F acquired by the position information acquisition unit 31 may be identifiablely displayed. .. In this case, the map information is provided with identification information (color or numerical value) in each region R according to the altitude information acquired at each specific point P and the tillage depths D1 and D2. For example, the altitude information may be indicated by a numerical value, and the tillage depths D1 and D2 may be indicated by a color. This makes it possible to compare the elevations of the plowing board TL at each specific point P for which the position information has been acquired.

Further, the altitude of the tillage board TL of the field F can be used for adjusting the height of the field surface FS between the fields F when a plurality of fields F having different altitudes are combined.
Next, a case where the first work vehicle 3 is a tractor will be described as an example. FIG. 7 is a side view of the tractor 9 as the first work vehicle 3. FIG. 8 is a plan view of the tractor 9.
The tractor 9 includes a traveling machine 60 traveling in the field F and a tiller 61 as a working machine attached to the traveling machine 60. As the working machine, for example, a plow, a fertilizer applicator, a mower, a sowing machine and the like can be used in addition to the tiller 61.

The traveling machine 60 of the tractor 9 is a pair of traveling parts that support the machine part 62 (first machine part) and are provided at intervals in the vehicle width direction WD (width direction of the machine part 62). It is equipped with 63. Each traveling unit 63 includes a front wheel 63A and a rear wheel 63B. The traveling machine body 60 can travel by the driving force of the engine 64. The working machine such as the tiller 61 is an example of the first working part supported by the first body part.

The machine body portion 62 of the traveling machine body 60 includes a driver's seat 62A for the user to board and a steering handle 62B for steering the traveling machine body 60. An operation unit 78 (see FIG. 9) for the user to perform various operations is provided in the vicinity of the steering handle 62B.
A chassis 65 of the tractor 9 is provided at the lower part of the machine body portion 62. The chassis 65 includes an airframe frame 65A, a transmission 65B, a front axle 65C, a rear axle 65D, and the like.

The airframe frame 65A is a support member at the front portion of the tractor 9, and supports the engine 64 directly or via an anti-vibration member or the like. The transmission 65B changes the power from the engine 64 and transmits it to the front axle 65C and the rear axle 65D. The front axle 65C transmits the power input from the transmission 65B to each front wheel 63A. The rear axle 65D transmits the power input from the transmission 65B to each rear wheel 63B.

The tiller 61 is connected to the rear of the machine body portion 62 via the elevating link mechanism 66. At the rear of the machine body portion 62, a PTO shaft 67 for outputting the driving force of the engine 64 to the tiller 61 and a pair of elevating cylinders 88 (see FIG. 9) for raising and lowering the tiller 61 are arranged. ing. The driving force of the engine 64 is transmitted to the PTO shaft 67 via the transmission 65B.

The tiller 61 includes a rotary 69, a rotary cover 70 that covers the rotary 69 from above, and a rear cover 71 that covers the rotary 69 from the rear. The rotary 69 rotates by transmitting the driving force of the PTO shaft 67. The rear cover 71 is connected to the rotary cover 70 via a hinge. Although the rear cover 71 is located above the surface (field surface) of the field F in FIG. 7, it is in contact with the field surface while the tractor 9 is traveling, and the field surface is leveled behind the rotary 69 in the traveling direction. Flatten.

The elevating link mechanism 66 is composed of a three-point link structure including a pair of left and right top links 66A and a pair of left and right lower links 66B. The pair of top links 66A are provided at intervals in the vehicle width direction WD. Similarly, the pair of lower links 66B are provided at intervals in the vehicle width direction WD.
An elevating cylinder 88 (see FIG. 9) is connected to the three-point link mechanism. By expanding and contracting the elevating cylinder 88, the entire tiller 61 can be elevated and lowered.

Further, each lower link 66B is provided with a horizontal control cylinder 88A (see FIG. 9). The horizontal control cylinder 88A is, for example, a hydraulic cylinder. By separately expanding and contracting each horizontal control cylinder 88A, the tiller 61 can be tilted with respect to the machine body portion 62 when viewed from the traveling direction. While the tractor 9 is traveling, the rear cover 71 rotates around a hinge as the rotary cover 70 and the rotary 69 move up and down to maintain contact with the field surface.

FIG. 9 is a block diagram showing the electrical configuration of the tractor 9. With reference to FIG. 9, the tractor 9 includes a control unit 75 for controlling the operation of each unit provided in the tractor 9.
A position information acquisition unit 76, a communication unit 77, an operation unit 78, and an inertial measurement unit 79 are electrically connected to the control unit 75. The positioning signal received by the satellite signal receiving antenna 80 located substantially in the center in the vehicle width direction is input to the position information acquisition unit 76. The position information acquisition unit 76, the satellite signal reception antenna 80, the communication unit 77, and the inertial measurement unit 79 are the position information acquisition unit 31, the satellite signal reception antenna 32, the communication unit 33, and the inertial measurement unit, respectively, provided in the combine 8. Since the configuration is the same as that of the device 45, the description thereof will be omitted.

Each of a plurality of controllers for controlling each part of the tractor 9 is electrically connected to the control unit 75. The plurality of controllers include an engine controller 81, a vehicle speed controller 82, a steering controller 83, an elevating controller 84, an attitude controller 84A, and a PTO controller 85. Since the engine controller 81 has the same configuration as the engine controller 35 of the combine 8, the description thereof will be omitted. The engine controller 81 is electrically connected to the common rail device 81A having the same configuration as the common rail device 39 of the combine 8.

The vehicle speed controller 82 controls the vehicle speed of the traveling machine body 60 (which is also the vehicle speed of the tractor 9) by controlling the transmission 65B (see FIG. 7). The transmission 65B is provided with, for example, a transmission 86 which is a movable diagonal plate type hydraulic continuously variable transmission.
The steering controller 83 controls the steering angle of the front wheels 63A during automatic driving. Specifically, the steering actuator 87 is provided in the middle of the rotation shaft (steering shaft) of the steering handle 62B. The steering controller 83 controls the steering actuator 87 so that the rotation angle of the steering handle 62B becomes the target steering angle. As a result, the steering angle of the pair of front wheels 63A of the traveling machine body 60 is controlled.

An elevating cylinder 88 is electrically connected to the elevating controller 84. In connection with the elevating controller 84, the elevating sensor 89 and the rear cover sensor 90 are electrically connected to the control unit 75. A horizontal control cylinder 88A is electrically connected to the attitude controller 84A.
The elevating sensor 89 is a sensor for detecting a vertical distance between a reference position provided on the machine body portion 62 and a predetermined portion of the rotary cover 70 (for example, a portion to which the rear cover sensor 90 is attached). .. The elevating sensor 89 is, for example, a potentiometer for detecting the position of the elevating cylinder 88.

The rear cover sensor 90 is a sensor for detecting the vertical distance between the predetermined portion of the rotary cover 70 and the field surface FS. The rear cover sensor 90 is, for example, a potentiometer or the like that detects the rotation angle of the rear cover 71 with respect to the rotary cover 70 that moves up and down integrally with the rotary 69.
While the tractor 9 is traveling, the rear cover 71 rotates around a hinge as the rotary cover 70 and the rotary 69 move up and down while maintaining contact with the field surface FS. As a result, the rotation angle detected by the rear cover sensor 90 changes. Therefore, by raising and lowering the rotary 69 and the rotary cover 70 while detecting the rotation angle of the rear cover 71 with the rear cover sensor 90, between the rice field FS (the portion of the rear cover 71 that contacts the rice field FS) and the lower end portion of the rotary 69. The vertical distance of the can be adjusted to a desired distance (a distance set by the user).

The elevating controller 84 controls the elevating cylinder 88 based on the detection results of the elevating sensor 89 and the rear cover sensor 90. Specifically, the elevating controller 84 controls the elevating cylinder 88 so that the predetermined portion of the rotary cover 70 (for example, the portion to which the rear cover sensor 90 is attached) is located above the field FS by a predetermined distance. ..
The attitude controller 84A separately controls the pair of horizontal control cylinders 88A even when the traveling machine 60 is tilted when viewed from the traveling direction, and the tiller 61 is used on one side and the other side of the vehicle width direction WD. The posture of the tiller 61 is maintained in the horizontal posture by changing the degree of ascending / descending. The attitude controller 84A determines the attitude of the traveling machine body 60 based on the detection result of the inertial measurement unit 79.

The PTO controller 85 controls the rotation of the PTO axis 67. Specifically, the tractor 9 includes a PTO clutch 91 for switching between transmission / disconnection of power to the PTO shaft 67. The PTO controller 85 can switch the PTO clutch 91 based on the control signal input from the control unit 75 to rotationally drive the tiller 61 via the PTO shaft 67 or stop the rotational drive.

The control unit 75 includes a microcomputer provided with a CPU and a memory (ROM, RAM, etc.). The microcomputer functions as a plurality of functional processing units by executing a predetermined program stored in the memory (ROM). Examples of the functional processing unit include a tillage distance acquisition unit 96, a surface layer distance acquisition unit 97, a tillage depth specifying unit 98, and a map information generation unit 99.

FIG. 10 is a schematic view of the tractor 9 traveling in the field F when viewed from the traveling direction. As shown in FIG. 10, when the height of the tillage board TL is different between one side and the other side in the vehicle width direction WD, the entire tractor 9 is tilted when viewed from the traveling direction. Here, it is assumed that the tractor 9 is tilted so that the traveling portion 63 on one side of the vehicle width direction WD is located below the traveling portion 63 on the other side of the vehicle width direction WD.

The tillage distance acquisition unit 96 acquires the tillage distances H3 and H4 based on the detection result of the inertial measurement unit 79. The tillage distance H3 on one side of the vehicle width direction WD includes a horizontal plane HS passing through a predetermined reference position S set in the machine body portion 62 and a traveling portion 63 (for example, rear wheel 63B) on one side of the vehicle width direction WD. It is a vertical distance between the grounding point C3 and the grounding point C3 that touches the tillage board TL. The tillage distance H4 on the other side of the vehicle width direction WD is vertical between the horizontal plane HS and the ground contact point C4 where the traveling portion 63 (for example, the rear wheel 63B) on the other side of the vehicle width direction WD touches the tillage plate TL. The distance in the direction.

Specifically, the tillage distance acquisition unit 96 acquires the inclination angle θ of the machine unit 62 with respect to the horizontal direction when viewed from the traveling direction of the tractor 9 based on the detection result of the inertial measurement unit 79. Then, the tillage distance acquisition unit 96 calculates the tillage distances H3 and H4 based on the inclination angle θ, the preset reference height T, and the reference width W.
The reference height T is the distance between the grounding points C3 and C4 and the inclined surface IS in the height direction HD of the tractor 9. The inclined surface IS is a surface that passes through the reference position S and is inclined by an inclination angle θ with respect to the horizontal plane HS when viewed from the traveling direction of the tractor 9. The reference width W is the distance between each traveling portion 63 and the reference position S in the vehicle width direction WD of the tractor 9.

In this case, the tillage distance H3 on one side of the vehicle width direction WD is a distance obtained by multiplying the sum of the reference height T and the distance obtained by multiplying the reference width W by tanθ by cosθ (H3 = (T + W · tanθ). ) Cosθ). The tillage distance H4 on the other side of the vehicle width direction WD is the distance obtained by multiplying the difference between the reference height T and the reference width W by tanθ by cosθ (H4 = (TW ・ tanθ)). cosθ).

The surface layer distance acquisition unit 97 acquires the surface layer distance j based on the detection results of the elevating sensor 89 and the rear cover sensor 90. Specifically, the surface layer distance j is the vertical distance B1 between the field FS and the predetermined portion of the rotary cover 70 (for example, the portion to which the rear cover sensor 90 is attached), and the predetermined portion and the reference position S. It is the sum of the vertical distance B2 (j = B1 + B2).

As described above, the vertical distance between the rice field FS and the lower end of the rotary 69 is set by the user. Therefore, the surface layer distance acquisition unit 97 determines the surface layer distance from the difference between the vertical distance between the reference position S and the lower end portion of the rotary 69 and the vertical distance between the rice field FS and the lower end portion of the rotary 69. It is also possible to calculate j.
The tillage depth specifying portion 98 is based on the tillage distances H3 and H4 and the surface layer distance j, and is the depth information of the tiller TL of the field F on one side in the vehicle width direction WD (one side tiller depth D3). And the depth information of the tillage board TL of the field F on the other side of the vehicle width direction WD (the other side tillage board depth D4) is specified. The one-side tillage depth D3 is the difference between the one-side tillage distance H3 in the vehicle width direction WD and the surface layer distance j (D3 = H3-j). The other-side tillage depth D4 is the difference between the other-side tillage distance H4 in the vehicle width direction WD and the surface layer distance j (D4 = H4-j).

When the tractor 9 finishes traveling in the entire area of the field F, the position information at each point in the field F is acquired by the position information acquisition unit 76, and the plowing depths D3 and D4 at each specific point P in the field F are cultivated. It is specified by the board depth specifying unit 98.
As described above, the tillage depth specifying unit 98 has the attitude control information of the machine unit 62 at the specific point P (detection result of the inertial measurement unit 79) and the attitude control information of the tiller 61 at the specific point P (elevation sensor 89). And the detection result of the rear cover sensor 90), the tillage depths D3 and D4 are specified.

The map information generation unit 99 cultivates the position information at each specific point P in the field F acquired by the position information acquisition unit 76 and the tillage at each specific point P in the field F specified by the plow depth specifying unit 98. Map information associated with board depths D3 and D4 is generated. Since the generated map information is the same as when the combine 8 is used as the first work vehicle 3, detailed description thereof will be omitted.

With reference to FIG. 9, a storage unit 92 is connected to the control unit 75. The storage unit 92 is composed of a storage device such as a hard disk and a non-volatile memory. The storage unit 92 stores the position information storage unit 93 that stores the position information of the tractor 9 and the cultivated board depths D3 and D4 at each specific point P in the field F specified by the cultivated board depth specifying unit 98. It includes a plow depth storage unit 94 and a map information storage unit 95 that stores map information generated by the map information generation unit 99.

When the first work vehicle 3 is a tractor 9, the same effect as when the first work vehicle 3 is a combine 8 is obtained.
However, the pair of traveling portions 63 of the tractor 9 cannot be expanded and contracted. Instead, in the tractor 9, the tillage distance acquisition unit 96 has an inclination angle θ of the machine body portion 62 when viewed from the traveling direction of the information acquisition vehicle, and a preset reference height T and a reference width W. It is configured to specify the tillage distances H3 and H4 based on the above. Therefore, even when a vehicle such as a tractor 9 configured so that the machine body portion 62 is tilted when traveling at a point where the plowing board depth is different in the vehicle width direction WD is used as the first work vehicle 3, the tilling is performed. The board depths D3 and D4 can be accurately specified.

Next, a case where the first work vehicle 3 shown in FIG. 1 is a rice transplanter 10 will be described as an example. FIG. 11 is a side view of the rice transplanter 10 as the first work vehicle 3. FIG. 12 is a plan view of the rice transplanter 10.
With reference to FIGS. 11 and 12, the rice transplanter 10 performs a planting operation of planting seedlings on the ground of the field F while traveling in the field F. The rice transplanter 10 includes a traveling machine 100 and a planting portion 101 arranged behind the traveling machine 100.

The traveling machine body 100 includes a machine body part 102 (first machine body part) and a pair of traveling parts 103 that support the machine body part 102 and are provided at a distance from each other in the vehicle width direction WD (width direction of the machine body part 102). I have. Each traveling unit 103 includes a front wheel 103A and a rear wheel 103B. The traveling machine body 100 can travel by the driving force of the engine 104. The planting section 101 is an example of a first working section supported by the first machine body section.

The machine body portion 102 of the traveling machine body 100 includes a driver's seat 102A for the user to board and a steering handle 102B for steering the traveling machine body 100. An operation unit 123 (see FIG. 13) for the user to perform various operations is provided in the vicinity of the steering handle 102B.
The airframe 102 includes a transmission 105B, a front axle 105C and a rear axle 105D. The transmission 105B changes the power from the engine 104 and transmits it to the front axle 105C and the rear axle 105D. The front axle 105C transmits the power input from the transmission 27 to each front wheel 103A. The rear axle 105D transmits the power input from the transmission 105B to each rear wheel 103B.

The planting portion 101 is connected to the rear of the machine body portion 102 via an elevating link mechanism 106. At the rear of the machine body 102, a PTO shaft 107 for outputting the driving force of the engine 104 to the planting portion 101 and an elevating cylinder 108 for raising and lowering the planting portion 101 are arranged. The driving force of the engine 104 is transmitted to the PTO shaft 107 via the transmission 105B.

The elevating link mechanism 106 is configured by a parallel link structure including a pair of left and right top links 106A and a pair of left and right lower links 106B. Although only one of the pair of top links 106A is shown in FIG. 11, the pair of top links 106A are provided at intervals in the vehicle width direction WD. Similarly, although only one of the pair of lower links 106B is shown in FIG. 11, the pair of lower links 106B are provided at intervals in the vehicle width direction WD.

An elevating cylinder 108 is connected to the parallel link mechanism. By expanding and contracting the elevating cylinder 108, the entire planting portion 101 can be elevated and lowered.
The planting unit 101 includes a plurality of (four in this embodiment) planting units 110 for planting seedlings on the ground, a planting input case 111 for driving the planting unit 110, and a seedling mat (not shown). It mainly includes a seedling stand 112 to be placed and a plurality of floats 113 that can rotate around a predetermined rotation center (float support shaft).

A pair of elevating link mechanisms 106 are connected to the planting input case 111, and a plurality of planting units 110 are attached to the planting input case 111.
Each planting unit 110 is a rotary planting device having a planting transmission case 115, a rotary case 116, and a planting arm 117. Two rotating cases 116 are attached to the planting transmission case 115 of each planting unit 110, and two planting arms 117 are attached to each rotating case 116.

The planting input case 111 drives the planting unit 110 by inputting a driving force from the PTO shaft 107. Power is transmitted to the planting transmission case 115 from the planting input case 111. The rotary case 116 is rotationally driven by power from the planting transmission case 115. As a result, the tip of the planting arm 117 operates by drawing a loop-shaped rotation locus. A planting claw 117A is provided at the tip of the planting arm 117. When the tip of the planting arm 117 moves from top to bottom, the planting claw 117A scrapes the seedlings from the seedling mat (not shown) placed on the seedling stand 112 and puts the seedlings on the rice field surface. Implant.

The float 113 is provided at the lower part of the planting portion 101. When the float 113 comes into contact with the surface of the rice field, the surface of the rice field before planting the seedlings is leveled. Although the float 113 is located above the surface (field surface) of the field F in FIG. 11, the float 113 maintains contact between the lower surface of the float 113 and the field surface FS while the rice transplanter 10 is running.
Further, a cylinder rod (not shown) of the rolling cylinder 108A (see FIG. 13) is connected to a support frame (not shown) that supports the seedling stand 112. The rolling cylinder 108A rotates the support frame around a predetermined rotation center by expanding and contracting the cylinder rod. As a result, the entire planting portion 101 can be tilted with respect to the machine body portion 102 when viewed from the traveling direction.

FIG. 13 is a block diagram showing an electrical configuration of the rice transplanter 10. With reference to FIG. 13, the rice transplanter 10 includes a control unit 120 for controlling the operation of each unit provided in the rice transplanter 10.
A position information acquisition unit 121, a communication unit 122, an operation unit 123, an inertial measurement unit 124, and a plurality of controllers are electrically connected to the control unit 120. The positioning signal received by the satellite signal receiving antenna 135 located substantially in the center of the vehicle width direction WD is input to the position information acquisition unit 121.

The position information acquisition unit 121, the satellite signal reception antenna 135, the communication unit 122, and the inertial measurement unit 124 are the position information acquisition unit 31, the satellite signal reception antenna 32, the communication unit 33, and the inertial measurement unit, respectively. Since the configuration is the same as that of the device 45, the description thereof will be omitted.
The plurality of controllers are for controlling each part of the rice transplanter 10. The plurality of controllers include an engine controller 125, a vehicle speed controller 126, a steering controller 127, an elevating controller 128, an attitude controller 128A and a PTO controller 129. A common rail device 130, a transmission 131, a steering actuator 132, and a PTO clutch 129A are electrically connected to the engine controller 125, the vehicle speed controller 126, the steering controller 127, and the PTO controller 129, respectively.

The engine controller 125, the vehicle speed controller 126, the steering controller 127, the PTO controller 129, the common rail device 130, the transmission 131, the steering actuator 132 and the PTO clutch 129A are the engine controller 81 and the vehicle speed controller 82 provided on the tractor 9, respectively. , The steering controller 83, the PTO controller 85, the common rail device 81A, the transmission 86, the steering actuator 87, and the PTO clutch 91 have the same configurations, and the description thereof will be omitted.

An elevating cylinder 108 is electrically connected to the elevating controller 128. In connection with the elevating controller 128, the elevating sensor 133 and the float angle detection sensor 134 are electrically connected to the control unit 120. A rolling cylinder 108A is electrically connected to the attitude controller 128A.
The elevating sensor 133 is a sensor for detecting the vertical distance between the reference position provided on the machine body 102 and the rotation center of the float 113. The elevating sensor 133 is, for example, a potentiometer or the like that detects the position of the elevating cylinder 108.

The float angle detection sensor 134 is a sensor for detecting the vertical distance between the center of rotation of the float 113 and the field surface FS. The float angle detection sensor 134 is, for example, a potentiometer or the like that detects the rotation angle of the float 113.
The center of rotation of the float 113 moves up and down according to the raising and lowering of the planting portion 101. While the rice transplanter 10 is running, the vertical distance between the rice transplanter FS and the center of rotation of the float 113 changes. Therefore, while the rice transplanter 10 is running, the float 113 rotates around the center of rotation as the planting portion 101 moves up and down in order to maintain contact between the float 113 and the rice transplanter FS. As a result, the rotation angle detected by the float angle detection sensor 134 changes.

Therefore, by moving the planting portion 101 up and down while detecting the rotation angle of the float 113 with the float angle detection sensor 134, the rotation locus of the field surface FS (the portion of the float 113 that contacts the field surface FS) and the planting claw 117A. The vertical distance from the lower end (planting position) can be adjusted to a desired distance (distance set by the user). The vertical distance between the field FS and the lower end of the rotation locus of the planting claw 117A is called the planting depth.

The elevating controller 128 controls the elevating cylinder 108 based on the detection results of the elevating sensor 133 and the float angle detection sensor 134. Specifically, the elevating controller 128 controls the elevating cylinder 108 so that the height of the planting claw 117A with respect to the float 113 is located at a predetermined position.
The posture controller 128A maintains the posture of the planting portion 101 in a horizontal posture by rotating the rolling cylinder 108A even when the traveling machine body 100 is tilted when viewed from the traveling direction. The attitude controller 128A determines the attitude of the traveling machine body 100 based on the detection result of the inertial measurement unit 124.

The control unit 120 includes a microcomputer provided with a CPU and a memory (ROM, RAM, etc.). The microcomputer functions as a plurality of functional processing units by executing a predetermined program stored in the memory (ROM). Examples of the functional processing unit include a tillage distance acquisition unit 136, a surface layer distance acquisition unit 137, a tillage depth specifying unit 138, and a map information generation unit 139.

The tillage distance acquisition unit 136, the surface layer distance acquisition unit 137, the tillage depth specifying unit 138, and the map information generation unit 139 are the tillage distance acquisition unit 96 and the surface layer distance acquisition unit provided in the control unit 75 of the tractor 9, respectively. It functions in the same manner as the section 97, the tillage depth specifying section 98, and the map information generation section 99.
However, the surface layer distance acquisition unit 137 specifies the surface layer distance j based on the elevating sensor 133 and the float angle detection sensor 134. The surface layer distance j is the sum of the distance between the field surface FS and the rotation center of the float 113 and the distance between the rotation center of the float 113 and the reference position S.

As described above, in the rice transplanter 10, the planting depth (vertical distance between the rice transplanter FS and the lower end of the rotation locus of the planting claw 117A) is set by the user. Therefore, the surface layer distance acquisition unit 137 may acquire the surface layer distance j from the difference between the vertical distance between the reference position S and the planting claw 117A and the planting depth.
When the first work vehicle 3 is a rice transplanter 10, the plow depth specifying unit 138 uses the attitude control information (detection result of the inertial measurement unit 124) of the machine unit 102 at the specific point P and the planting at the specific point P. The plow depths D3 and D4 are specified based on the attitude control information of the unit 101 (the detection result of the elevating sensor 132 and the detection result of the float angle detection sensor 134).

A storage unit 140 is connected to the control unit 120. The storage unit 140 is composed of a storage device such as a hard disk and a non-volatile memory. The storage unit 140 stores the position information storage unit 141 that stores the position information of the rice planting machine 10, and the tillage depth that stores the tillage depth at each point in the field F specified by the tillage depth identification unit 138. It includes a storage unit 142 and a map information storage unit 143 that stores map information generated by the map information generation unit 139.

When the first work vehicle 3 is a rice transplanter 10, the same effect as when the first work vehicle 3 is a tractor 9 is obtained.
In the map information generation system 1, when the first work vehicle 3 is a tractor 9, the elevating controller 84 horizontally controls the posture of the tiller 61 based on the detection result of the inertial measurement unit 79. Instead of using the detection result of 79, the posture of the tiller 61 may be controlled horizontally by the angular velocity sensor (horizontal control device) provided in the tiller 61. Similarly, even when the first work vehicle 3 is a rice transplanter 10, the posture of the planting portion 101 may be horizontally controlled by an angular velocity sensor (horizontal control device) provided in the planting portion 101.

The map information generated by the map information generation system 1 is used, for example, for field improvement work and fertilization management support to be performed until the next farm work is performed in the field from which the map information has been acquired. As an example of the field improvement work, there is a work of putting soil improvement materials such as gravel into a part where the plowing depth is large in the field. Fertilization management support includes the work of reducing fertilizer in a field where the plowing depth is large. The lodging can be suppressed by reducing the fertilizer in the part where the plowing depth is large.

Further, the map information generated by the map information generation system 1 is used for work support by the work support system 2 as described below. As the second work vehicle 4 of the work support system 2, a combine, a tractor, a rice transplanter, or the like can be used.
The configurations of the combine, the tractor, and the rice transplanter used as the second work vehicle 4 are substantially the same as those of the combine 8, the tractor 9, and the rice transplanter 10 used as the first work vehicle 3, respectively. The combine 8, the tractor 9, and the rice transplanter 10 are supported by the second machine part (machine part 19, 62, 102) and the second machine part so as to be able to move up and down, and work in the field F (the second working part). It has a cutting section 17, a tiller 61, and a planting section 101).

For example, the work support system 2 gives a predetermined notification before the second work vehicle 4 reaches the notification target position based on the notification target position specified based on the map information and the position information of the second work vehicle 4. It is possible to execute the notification processing to be performed. FIG. 14 is a schematic diagram showing the notification target position NT and the notification position NP specified in the map information.
When the second work vehicle 4 is the tractor 9, the notification target position NT is, for example, a position where the plowing board depth changes abruptly. Whether or not the second work vehicle 4 has approached the notification target position NT depends on whether or not the second work vehicle 4 has reached the notification position NP a predetermined distance before the notification target position NT in the traveling direction of the second work vehicle 4. Judgment is based on. The predetermined notification is, for example, a warning display displayed on a monitor mounted on the second work vehicle 4 or a wireless communication terminal 7 (see FIG. 1), or a warning issued from the second work vehicle 4 or the wireless communication terminal 7. Voice etc.

FIG. 15 is a flowchart showing an example of such notification processing. First, the second work vehicle 4 acquires the current position of the second work vehicle 4 (step S1). Then, the second work vehicle 4 determines whether or not the current position of the second work vehicle 4 is the notification position NP (step S2). When the current position of the second work vehicle 4 is the notification position NP (step S2: YES), the second work vehicle 4 starts the notification to the user (step S3). When the notification to the user is started, the second work vehicle 4 returns to step S1.

When the current position of the second work vehicle 4 is not the notification position NP (step S2: NO), the second work vehicle 4 determines whether or not the notification is currently being performed (step S4). If the notification is not currently being performed (step S4: NO), the second work vehicle 4 returns to step S1.
If the notification is currently being performed (step S4: YES), the second work vehicle 4 determines whether or not the notification target position NT has passed (step S5). If the second work vehicle 4 has not passed the notification target position NT (step S5: NO), the second work vehicle 4 returns to step S1. When the second work vehicle 4 has passed the notification target position NT (step S5: YES), the second work vehicle 4 ends the notification to the user (step S6), and returns to step S1.

By notifying the user that the user has approached the notification target position NT, the user can prepare for work suitable for the notification target position NT before the second work vehicle 4 reaches the notification target position NT. .. For example, when the second work vehicle 4 is a tractor 9, the height position of the tiller 61 can be changed to avoid contact between the tiller TL and the tiller 61. This makes it possible to improve the quality of work support.

The notification target position NT may be a specific range (area between two coordinates) instead of a specific (single) coordinate. In this case, when the specific range is passed in step S5 (step S5: YES), the second work vehicle 4 shifts to step S6.
When the notification target position NT is within a specific range, the notification content from the time when the second work vehicle 4 passes through the notification position NP to the notification target position NT, and the notification content of the second work vehicle 4 to the notification target position NT. The content of the notification when traveling may be different.

Specifically, a warning voice emitted from the second work vehicle 4 or the wireless communication terminal 7 between the time when the second work vehicle 4 passes through the notification position NP and the time when the notification target position NT is reached, and the second work vehicle. The warning voices emitted from the second work vehicle 4 or the wireless communication terminal 7 when 4 is traveling at the notification target position NT may be different from each other.
As a result, the user can prepare for work suitable for the notification target position NT before the second work vehicle 4 reaches the notification target position NT, and the second work vehicle 4 is at the notification target position NT. It is possible to know that it has been reached by notification.

Further, the notification to the user may be terminated by operating the notification end button displayed on the wireless communication terminal 7. In this case, the notification to the user is completed by operating the notification end button or passing the notification target position NT.
Further, in the work support system 2, the second work unit (cutting unit 17, tiller 61, planting unit 101) is located higher than the depth of the tillage board specified based on the map information. The ascending / descending range of the working part can be limited. Therefore, the contact of the second working portion with the tillage board TL can be suppressed. Further, if the position of the culvert is registered in advance, it is possible to prevent the second working unit (particularly the tiller 61) from coming into contact with the culvert.

FIG. 16 is a flowchart showing an example of such an ascending / descending range limiting process. First, the second work vehicle 4 acquires the current position of the second work vehicle 4 (step S11). Then, the second work vehicle 4 acquires the plowing board depth at the current position from the map information (step S12).
Then, the second work vehicle 4 determines whether or not the current position is a restricted required position (step S13). The restricted required position is, for example, a position that overlaps with the culvert in a plan view. When the current position of the second work vehicle 4 is a position requiring restriction (step S13: YES), the ascending / descending range of the second working unit is restricted (step S14). When the ascending / descending range of the second working unit is limited, the second working vehicle 4 returns to step S11.

When the current position of the second work vehicle 4 is not the position required for control (step S13: NO), the second work vehicle 4 determines whether or not the elevating range of the second work unit is currently restricted (step). S15).
When the elevating range of the working unit is currently limited (step S15: YES), the second working vehicle 4 releases the restriction on the elevating range of the working unit (step S16). When the ascending / descending range of the working unit is limited, the second working vehicle 4 returns to step S11. If the ascending / descending range of the second working unit is not currently limited in step S15 (step S15: NO), the second working vehicle 4 returns to step S11.

Further, the work support system 2 can generate a travel route for traveling the second work vehicle 4. FIG. 17 is a schematic diagram showing an example of the travel path RT generated by the work support system 2. The work support system 2 specifies a travel-prohibited area PA in which the second work vehicle 4 is prohibited from traveling, and generates a travel route RT so as not to pass through the travel-prohibited area PA.
The traveling route RT shown in FIG. 17 has a substantially spiral shape from the peripheral edge of the field F toward the center. In FIG. 17, the traveling prohibited area PA is shown by a two-dot chain line. The traveling prohibited area PA is an area existing in the field F due to an obstacle or an area in which the tillage board is recessed to the extent that the second work vehicle 4 fits into the field F.

The travel route RT is generated by a terminal capable of generating a travel route, such as a wireless communication terminal 7 (see FIG. 1), and is transmitted from the wireless communication terminal 7 to the second work vehicle 4. By forming the traveling route RT so as not to pass through the traveling prohibited area PA, the traveling prohibited area PA can be avoided. As a result, the second work vehicle 4 can be smoothly driven. As a result, the quality of work support can be improved.

Further, the traveling route RT may be provided with a traveling caution area in addition to the traveling prohibited area PA. The traveling caution area is an area in which the second work vehicle 4 fits in, for example, when the vehicle speed is high or when the second work vehicle 4 changes (turns) in the traveling direction. When traveling in such a traveling caution area, the second work vehicle 4 reduces the vehicle speed, turns on the diff lock, and positions the steering handles 15B, 62B, 102B in order to prevent fitting. Fix it.

Further, when the second work vehicle 4 is a combine 8, the work support system 2 can avoid contact between the field surface FS and the cutting blade 17A by using the map information. Specifically, the combine 8 controls the cutting unit 17 to move up and down toward the target position in order to maintain a constant distance between the cutting blade 17A and the field surface FS when traveling in the field F.
For example, as shown in FIG. 18A, when the tillage depth D increases toward the downstream side in the traveling direction of the combine 8, the cutting section 17 (second body section) is compared with the machine section 19 (second machine section). 2 The working part is maintained at the target position by raising the working part).

As shown in FIG. 18B, when the tillage depth D becomes smaller toward the downstream side in the traveling direction of the combine 8, cutting is performed with respect to the machine body 19 immediately after the machine body 19 approaches the slope and tilts. By lowering the portion 17, the cutting blade 17A may come into contact with the surface layer SL.
Therefore, based on the map information, the work support system 2 desensitizes the position 152 at which the cutting section 17 starts descending in the region where the tillage depth D sharply decreases toward the downstream side in the traveling direction of the combine 8. Specify as a control position.

Further, as shown in FIG. 18C, when the tiller depth D increases immediately after the tiller depth D decreases toward the downstream side in the traveling direction of the combine 8, the machine unit 19 is contacted. Immediately after lowering the cutting section 17, it is necessary to raise the cutting section 17 with respect to the machine body section 19. Therefore, when the followability of the cutting section 17 to the target position is high, there is a possibility that the cutting section 17 is lowered too much with respect to the machine section 19 when the tillage depth D starts to increase. Even in such a case, the cutting blade 17A may come into contact with the surface layer SL.

Even in this case, the work support system 2 increases the tillage depth D immediately after the tiller depth D decreases toward the downstream side in the traveling direction of the combine 8 based on the map information. In the region, the position 150 where the cutting unit 17 starts descending and the position 151 where the ascending portion starts are specified as insensitivity control positions.
Based on the map information, the work support system 2 specifies a position (position 153 shown in FIG. 18A) at which the cutting unit 17 starts to move up and down other than the insensitivity control position as a standard control position.

Then, the work support system 2 has the followability of the cutting unit 17 to the target position when the combine 8 reaches the insensitivity control position, and the followability of the cutting unit 17 to the target position when the combine 8 reaches the standard control position. Lower than.
As a result, it is possible to suppress the amount of change in the height position of the cutting portion 17 with respect to the machine body portion 19 at the insensitivity control position. As a result, the contact of the cutting blade 17A with the surface layer SL can be suppressed.

As shown in FIG. 18C, whether the work support system 2 sets the current position of the combine 8 as the insensitivity control position when the tillage depth D becomes smaller or becomes larger immediately after the tillage depth D becomes smaller. Whether or not it is determined is determined by whether or not the amount of change in the inclination angle of the combine 8 becomes larger than the reference amount per unit time. The reference amount is set lower as the vehicle speed of the combine 8 is higher, and is set lower as the distance of the inclined portion of the tiller TL is longer.

FIG. 19 is a flowchart showing an example of such an elevating control process. First, the second work vehicle 4 acquires the current position of the combine 8 (step S21). Then, it is determined whether or not the combine 8 is located at either the standard control position or the insensitivity control position (step S22).
If the current position of the combine 8 is neither the standard control position nor the insensitivity control position (step S22: NO), the combine 8 returns to step S21. When the current position of the combine 8 is either the standard control position or the insensitivity control position (step S22: YES), the combine 8 determines whether the current position of the combine 8 is the standard control position or the insensitivity control position. Is determined (step S23).

When the current position of the combine 8 is the standard control position (step S23: YES), the combine 8 raises or lowers the cutting unit 17 with the elevating sensitivity as the standard (with the followability as the standard) (step S24). Then, after step S24, the second work vehicle 4 returns to step S21. When the current position of the combine 8 is the insensitivity control position (step S23: NO), the combine 8 raises or lowers the cutting section 17 with the elevating sensitivity as insensitivity (with the followability as insensitivity) (step S25). Then, after step S25, the combine 8 returns to step S21.

The present invention is not limited to the embodiments described above, and can be implemented in still other embodiments.
For example, in the above-described embodiment, the tillage distance acquisition unit 50, 96, 136, the surface layer distance acquisition unit 51, 97, 137, the tillage depth identification unit 52, 98, 138, and the map information generation unit 53, 99. , 139 are functional processing units included in the control units 30, 75, 120 of the first work vehicle 3. However, unlike the above-described embodiment, the control device provided in the management server 6 may function as these functional processing units.

Further, in the above-described embodiment, the tillage depth information includes the attitude control information of the first machine unit (machine unit 19, 62, 102) and the first working unit (cutting unit 17, tiller 61, planting unit). It is specified based on the attitude control information of 101). However, the tillage depth information may be specified only based on the attitude control information of the first machine unit, or may be specified based only on the attitude control information of the first working unit.

Further, in the above-described embodiment, among the detection results of the inertial measurement units 45, 79, 124, only the detection result of the third angular velocity sensor is used for the attitude control information of the first machine body. However, unlike the above-described embodiment, the detection result of the first angular velocity sensor and the detection result of the second angular velocity sensor may be used for the attitude control information of the first machine body portion. For example, by using the detection result of the first angular velocity sensor, it is possible to acquire the plowing depth at points separated by a predetermined interval in the traveling direction of the first work vehicle 3. Further, the detection results of each angular velocity sensor may be combined.

In addition, various changes can be made within the scope of the claims.

[Additional Notes]
In one embodiment of the present invention, the position information of a first work vehicle having a first machine body part and a first work part supported by the first machine body part is acquired at a specific point in a field, and the specification is performed. A plurality of tillage depth information is specified based on the attitude control information of the first machine unit and / or the attitude control information of the first work unit at a point, and the position of the first work vehicle at the specific point. Provided is a map information generation system that generates map information in which information and the plurality of plow depth information are associated with each other.

According to this configuration, a plurality of tillage depth information is specified at a specific point. Therefore, by associating the position information of the first work vehicle at the specific point with the plurality of tillage depth information, it is possible to generate map information having detailed tillage depth information at the specific point. This makes it possible to improve the quality of work support.
In one embodiment of the present invention, the plurality of tillage depth information supports the first machine body portion and the first working part, and is arranged at predetermined intervals in the width direction of the first machine body portion. It contains information on the depth of the tillage at the point where the pair of traveling parts touch the ground.

That is, the tillage depth information is acquired at two points in the width direction of the first machine body portion. Therefore, it is possible to generate map information having detailed tillage depth information at a specific point.
In one embodiment of the present invention, the position information of the first work vehicle includes altitude information. Then, in the map information, the plurality of tillage depth information at the specific point is displayed so as to be distinguishable from each other, and the altitude information of the specific point and the altitude information of another point different from the specific point are displayed. Is displayed identifiable. Therefore, by referring to the map information, it is possible to compare the elevation of the plow at a specific point with the elevation of the plow at another point.

In one embodiment of the present invention, a second machine unit traveling in the field and a second working unit attached to the second machine unit so as to be able to move up and down with respect to the second machine unit to perform work in the field. A work support system for supporting a second work vehicle having the above is provided based on the map information generated by the map information generation system. Then, based on the notification target position specified based on the map information and the position information of the second work vehicle, the work support system determines a predetermined position before the second work vehicle reaches the notification target position. Notify.

According to this configuration, the user can prepare for work suitable for the notification target position before the second work vehicle reaches the notification target position. This makes it possible to improve the quality of work support.
In one embodiment of the present invention, the work support system is such that the height position of the second working portion is higher than the plowing board depth specified based on the map information based on the map information. Limit the ascending / descending range of the second working unit. Therefore, the contact of the second working portion with the tillage board can be suppressed.

In one embodiment of the present invention, the work support system identifies a travel prohibited area in which the second work vehicle is prohibited from traveling based on the map information, and determines a travel route for the second work vehicle to travel. , Generated so as not to pass through the traveling prohibited area. As a result, the traveling prohibited area can be avoided, so that the second work vehicle can be smoothly traveled. As a result, the quality of work support can be improved.

In one embodiment of the present invention, the second working unit is provided in the front portion of the second machine body unit, and is controlled to move up and down toward a target position where the height with respect to the surface of the field is constant. It is configured in. Then, the work support system identifies a standard control position and an insensitivity control position based on the map information, and the second work unit with respect to the target position when the second work vehicle reaches the insensitivity control position. The followability of the second work unit is made lower than the followability of the second work unit with respect to the target position when the second work vehicle reaches the standard control position.

When the plowing board depth changes along the traveling direction of the second working vehicle, the second working portion is moved up and down toward a target position where the height with respect to the surface of the field is constant. When the followability of the second working part to the target position is standardized at the insensitivity control position, the amount of change in the height position of the second working part with respect to the second machine part becomes too large, and the second working part becomes the field. There is a risk of contact with the surface of the. Therefore, the followability of the second work unit to the target position when the second work vehicle reaches the insensitivity control position, and the followability of the second work unit to the target position when the second work vehicle reaches the standard control position. By making it lower than the above, it is possible to suppress the amount of change in the height position of the second working portion with respect to the second machine portion in the insensitivity control position. This makes it possible to suppress the contact of the second working portion with the surface of the field.

1: Map information generation system 2: Work support system 3: 1st work vehicle 4: 2nd work vehicle 8: Combine 9: Tractor 10: Rice transplanter 17: Mowing part (1st work part, 2nd work part)
18, 63, 103: Traveling parts 19, 62, 102: Airframe parts (first machine part, second machine part)
61: Tiller (1st working part, 2nd working part)
101: Planting part (1st working part, 2nd working part)
150: Insensitivity control position 151: Insensitivity control position 152: Insensitivity control position 153: Standard control position NT: Notification target position PA: Traveling prohibited area RT: Traveling route WD: Vehicle width direction (width direction of the first machine body)

Claims (3)

Get the location information of the work vehicle,
The tillage depth information is specified by the posture of the work device provided behind the work vehicle, and the tillage depth information is specified.
A map information generation system that generates map information corresponding to the position information and the tillage depth information. The work vehicle is a tractor
The map information generation system according to claim 1, wherein the tillage depth information is specified from the attitude control information of the tractor machine and the posture control information of the rotary that can move up and down behind the tractor machine. The work vehicle is a rice transplanter,
The map information according to claim 1, wherein the cultivated board depth information is specified from the attitude control information of the rice transplanter machine and the attitude control information of the planting portion that can be raised and lowered behind the rice transplanter machine. Generation system.

Images