Work vehicle management system

Abstract

We provide a work vehicle management system that allows for centralized management of multiple work vehicles, enabling work to be carried out on multiple fields. [Solution] The system includes a control unit that acquires field-related information including information on multiple fields, work-related information including information on work content linked to each of the multiple fields, work vehicle information including information on each of the multiple work vehicles, and map information outside the fields including information on farm roads between fields. Based on the work vehicle information and work-related information, the control unit links multiple fields corresponding to each of the multiple work vehicles, selects two or more fields from the multiple fields linked to each of the multiple work vehicles and assigns them to each work vehicle, and creates an inter-field route based on the map information for moving the work vehicle from one of the two or more assigned fields to the other.

Description

Technical Field

[0001] The present invention relates to a work vehicle management system for managing a plurality of work vehicles.

Background Art

[0002] A work vehicle management system has been proposed that creates a work route for a work vehicle to travel and perform work based on field-related information about a field and work-related information for each field. However, since this work vehicle management system is for a single work vehicle, it cannot centrally manage two or more (a plurality of) work vehicles, and there is room for improvement.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, an object of the present invention is to solve such problems and provide a work vehicle management system that can centrally manage a plurality of fields so that a plurality of work vehicles can perform work on them.

Means for Solving the Problems

[0005] To achieve the above object, a first invention includes a plurality of work vehicles that travel on a plurality of fields, a control unit that acquires field-related information including information on the position, shape, and entrances and exits of each of the plurality of fields, a plurality of work-related information including information on work contents associated with each of the plurality of fields, a plurality of work vehicle information including information possessed by each of the plurality of work vehicles for executing the work contents of the plurality of work-related information, and off-field map information including information on farm roads between fields. The control unit provides a work vehicle management system characterized by: linking the plurality of fields corresponding to each of the plurality of work vehicles based on the plurality of work vehicle information and the plurality of work-related information; selecting two or more fields from the plurality of fields linked to each of the plurality of work vehicles and assigning them to each work vehicle; and creating an inter-field route for moving the work vehicle from one of the two or more assigned fields to the other field based on the map information.

[0006] According to the first invention described above, the control unit links multiple fields corresponding to each of the multiple work vehicles based on multiple work vehicle information and multiple work-related information. It selects two or more fields from the multiple fields linked to each of the multiple work vehicles and assigns them to each work vehicle. It creates an inter-field route based on map information for moving the work vehicle from one of the two or more assigned fields to the other field. By having each of the multiple work vehicles move from one of the two or more fields to the other and perform work based on the created inter-field route, it becomes easier to centrally manage multiple fields so that work can be performed by multiple work vehicles.

[0007] The second invention is, In the work vehicle management system, the control unit, when having each of the plurality of work vehicles work in the two or more fields assigned to it, calculates the travel time from the distance of the route between the fields and the travel speed of the work vehicle between the fields, creates a work route for each of the two or more fields assigned to it based on the field-related information and the work vehicle information, calculates the work time in the field from the distance of the two or more created work routes and the travel speed of the work vehicle traveling along each work route, and calculates the operating time for each of the plurality of work vehicles by adding the travel time and the work time in the two or more fields.

[0008] According to the second invention described above, once work is completed in one of several fields, the work vehicle can be automatically moved to the other field based on the inter-field route. Furthermore, by calculating the operating time of the work vehicles and comparing the operating times of multiple work vehicles, it is possible to efficiently manage multiple work vehicles while checking for any imbalances in their operating times.

[0009] The third invention is, In the work vehicle management system, the control unit adds time information to the inter-field route, and when the time information indicates that the multiple work vehicles are about to meet while traveling along the inter-field route, it notifies the worker.

[0010] According to the third invention described above, if the control unit determines from time information that multiple work vehicles are about to meet while traveling along a field route, it notifies the workers, allowing them to take measures to avoid the collision.

[0011] The fourth invention is, In a work vehicle management system, the control unit is characterized in that, when the difference between the operating time of one of the plurality of work vehicles and the operating time of the other work vehicle is greater than or equal to a predetermined time, or when it is found that the plurality of work vehicles will meet in a collision while traveling along the inter-field route, the control unit changes the association between the plurality of work vehicle information and the plurality of work-related information.

[0012] According to the fourth invention described above, when the difference between the operating time of one of the multiple work vehicles and the operating time of the other work vehicle is greater than or equal to a predetermined time, the control unit can reduce the operating time of work vehicles with long operating times by changing the association between the multiple work vehicle information and the multiple work-related information, thereby suppressing the imbalance in operating times among the work vehicles. Furthermore, if the control unit finds that multiple work vehicles are about to meet while traveling along a field route, it can prevent the work vehicles from meeting each other by changing the association between the multiple work vehicle information and the multiple work-related information. [Effects of the Invention]

[0013] According to the present invention, by creating inter-field routes for moving each of the multiple work vehicles from one field to another, it is possible to provide a work vehicle management system that enables centralized management so that work can be carried out in multiple fields using multiple work vehicles. [Brief explanation of the drawing]

[0014] [Figure 1] Figure 1 shows a display unit used in a work vehicle management system according to an embodiment of the present invention, displaying six fields, a list of tasks for each field, and side views of three tractors. [Figure 2] Figure 2 is a control block diagram relating to the control system of the work vehicle management system shown in Figure 1. [Figure 3] Figure 3 is an explanatory diagram showing the work route of the first tractor T1 in fields A and B, the travel route from field A to field B, and the operating time of the first tractor. [Figure 4] Figure 4 is an explanatory diagram showing side views of the three tractors, their operating times, and the field routes between the second and third tractors. [Figure 5] Figure 5 is an explanatory diagram showing the operating time of each tractor after the tilling work of the first tractor in field B and the tilling work of the second tractor in field E have been swapped. [Figure 6] Figure 6 is a flowchart for creating work routes and inter-field routes. [Modes for carrying out the invention]

[0015] Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings. In the following description, unless otherwise specified, the forward direction of the work vehicle will be referred to as "forward," the opposite direction as "rear," and when facing forward, the right side will be referred to as "right" and the left side as "left."

[0016] Figure 1 shows three tractors as a plurality of work vehicles. The first tractor T1 in Figure 1 is connected with a first rotary tiller R1 which is a working machine for tilling work at the rear of the tractor body. The second tractor T2 in Figure 1, similar to the first tractor T1, is connected with a second rotary tiller R2 which is a working machine for tilling work at the rear of the tractor body. Since the second tractor T2 is a large vehicle with a larger working width and a higher traveling speed (including the working speed during operation) than the first tractor T1, the operating time described later can be shortened compared to the first tractor T1. The third tractor T3 in Figure 1 is connected with a harrow H which is a working machine for weeding work at the rear of the tractor body. Figure 1 shows a work list for work to be carried out on June 1st, and four fields, Field A, Field B, Field E, and Field F, are scheduled to carry out tilling work. Also, two fields, Field C and Field D, are scheduled to carry out weeding work. In this embodiment, work on a plurality (six) of fields is carried out using two tractors T1 and T2 for tilling work and one tractor T3 for weeding work, but the number of work vehicles may be any number as long as it is a plurality (two or more). Also, the work in the fields is not limited to tilling work and weeding work, and may be crop harvesting work, rice transplanting work, fertilizing work, etc.

[0017] The work vehicle management system includes three tractors T1, T2, T3 and, as shown in Figure 2, a control unit S that acquires field-related information, work-related information, work vehicle information, and map information. The control unit S is provided in each of the tractors T1, T2, T3.

[0018] The field-related information includes information indicating the position, shape (outer shape), and entrances and exits A1, B1, C1, D1, E1, F1 (see Figure 1) of each of a plurality (six fields A to F in this embodiment) of fields that are work targets, and this information is linked to the map information and stored in a storage unit 1 provided in the control unit S. In this embodiment, one entrance and exit is provided for each field, but two or more may be provided.

[0019] The work-related information is information on the work content (tilling work, weeding work, etc.) associated with each of a plurality of fields, and the like, which is acquired (or input) and stored in the storage unit 1 provided in the control unit S.

[0020] The work vehicle information includes identification information for uniquely identifying each work vehicle, information on the work implements provided on each work vehicle for executing the work content (tilling work, weeding work, etc.) of the work-related information, that is, work implement type information (work implement information for tilling or weeding), work width information (information on the work width of tilling or weeding), work speed information when the work implement is lowered in the field to perform work, turning speed information when the work implement is raised in the field and each work vehicle is turned, in-field movement speed information when moving from the entrance / exit of the field to the work start position where work is to be started, out-of-field movement speed information when moving between fields, etc., which is stored in the storage unit 1 provided in the control unit S.

[0021] The map information includes geographical information such as green spaces, rivers, roads, etc., and is image-displayed on the display device 2 provided at a position operable from the driver's seat of the work vehicle. As shown in FIG. 1, a plurality of (six in FIG. 1) fields to be worked on within a certain area are displayed together with farm roads according to a predetermined scale. In this embodiment, the six fields are designated as the first field A, the second field B, the third field C, the fourth field D, the fifth field E, and the sixth field F, and one entrance / exit A1 or B1 or C1 or D1 or E1 or F1 for the work vehicle to enter and exit is provided in each of the fields A or B or C or D or E or F. The display device 2 superimposes and displays the position information of the work vehicle acquired from the positioning device 3 (see FIG. 2) described later on the map information of a predetermined area including the fields, and also functions as an input device capable of inputting the field on which work is to be performed.

[0022] As an example shown in Figure 1, a straight farm road 4 is formed between fields A, B, and C located in the upper part of the figure and fields D, E, and F located in the lower part of the figure, extending from left to right in the figure. Work vehicles move between fields via this farm road 4. In Figure 3, a work vehicle (first tractor T1) completes work in field A (e.g., tilling) and then drives out of the entrance A1 of field A to the entrance B1 of field B. Upon arriving at the entrance B1 of field B, the work vehicle (first tractor T1) moves into field B and performs work in field B (e.g., tilling). The width of the farm road is usually such that two work vehicles cannot pass each other.

[0023] Furthermore, as shown in Figure 2, the work vehicle management system includes a positioning device 3, a communication device 5, an automatic driving control unit 6 provided in the control unit S, and a remote control operation device 7 for automatically controlling the tractors T1, T2, and T3 by transmitting various signals to the control unit S from a remote location. The remote control operation device 7 can be switched by outputting a signal that switches the driving mode switching switch 8, which will be described later, between manual driving mode and automatic driving mode.

[0024] The positioning device 3 consists of a GNSS (Global Navigation Satellite System) control device that acquires position information, including positioning points indicating the location of the work vehicle. The GNSS control device can receive radio waves from navigation satellites orbiting the Earth to determine the position of the work vehicle and also time it. Therefore, the position information of the work vehicle can be obtained along with the time information in which its position was measured. Based on the position information from the positioning device 3, the work vehicle is then automatically driven along a pre-registered route.

[0025] The automatic driving control unit 6 functions as part of the control function of the control unit S, controlling each operation of the tractor and implements, namely the first rotor R1, the second rotor R2, and the harrow H, during automatic travel between fields or automatic work within a field, based on programs, various data, etc. The automatic driving control unit 6 is configured to control the travel of the work vehicle and the operation of the implements, namely the first rotary R1, the second rotary R2, and the harrow H. Furthermore, the automatic driving control unit 6 operates based on detection information that the driving mode switch 8 on each tractor T1, T2, and T3 has been switched from manual driving mode to automatic driving mode by a signal from the remote control operation device 7.

[0026] As each of the multiple tractors has an automatic driving control unit 6, they are equipped with a positioning device 3, a communication device 5, an obstacle sensor 9, a camera 10, a display device 2, a buzzer 11, a voice playback device 12, etc., as shown in Figures 1 and 2.

[0027] The communication device 5 is a device capable of data communication with equipment such as the remote management and operation device 7. As for the communication method, for example, general-purpose communication network technologies such as the Internet, mobile communication systems such as 4G, and short-range wireless communication technologies such as Wi-Fi and Bluetooth (registered trademark) may be applied. Furthermore, the communication device 5 may be configured to relay communications by installing base stations at required locations such as near the field.

[0028] The obstacle sensor 9 is a sensor that detects obstacles in the surroundings when the tractor is in motion, and can be composed of, for example, a photoelectric sensor, an ultrasonic sensor, an infrared sensor, etc.

[0029] Camera 10 is an imaging device capable of recording video, allowing the surroundings and the condition of the tractor to be viewed visually while the work vehicle is in motion. The obstacle sensor 9 and camera 10 are not limited to just one location on the work vehicle, but may be placed at multiple locations where obstacle detection and imaging are required.

[0030] The display device 2 displays necessary information to be conveyed to the driver or other person sitting in the driver's seat, and is composed of, for example, a liquid crystal display panel.

[0031] Buzzer 11 emits an alarm sound primarily to alert people near the work vehicle.

[0032] The audio playback device 12 primarily plays audio to inform people around the work vehicle that automatic driving or work is being performed, and is composed of, for example, an audio generator, a speaker, etc.

[0033] Then, as shown in Figure 2, the automatic driving control unit 6 links multiple (6) fields (A to F) that have corresponding work content to multiple (3) work vehicles (tractors T1, T2, T3) based on multiple work-related information, which includes information on the work content associated with each of the multiple fields, and multiple work vehicle information, which includes information on each of the multiple work vehicles that perform the work content of the multiple work-related information. Next, the automatic driving control unit 6 includes an assignment means 13 that selects two or more fields from the multiple fields associated with each of the multiple (3) work vehicles (tractors T1, T2, T3) and assigns them to each work vehicle, and an inter-field route creation means 14 that creates an inter-field route based on map information for moving the work vehicle from one of the two or more assigned fields to the other field.

[0034] The allocation means 13 is a means of selecting two or more fields from a plurality of fields (six fields) linked to each of a plurality of work vehicles (three tractors T1, T2, T3) and assigning them to each work vehicle. The first tractor T1 is a tractor capable of tilling work, and is linked to four fields (field A, field B, field E, field F) where tilling work is planned to be performed. Two of these four linked fields (field A, field B, field E, field F) are selected by the allocation means 13 and assigned to the first tractor T1. Furthermore, the second tractor T2, like the first tractor T1, is a tractor capable of tilling, and is linked to four fields (Field A, Field B, Field E, Field F) where tilling is planned. Of the four linked fields (Field A, Field B, Field E, Field F), the remaining two fields (Field E, Field F) are selected by the allocation means 13 and assigned to the second tractor T2. In addition, the third tractor T3 is a tractor capable of puddling, and since there are only two fields (Field C, Field D) where puddling is planned, these two fields (Field C, Field D) are selected by the allocation means 13 and assigned to tractor T3.

[0035] The field-to-field route creation means 14 creates field-to-field routes for each of the three work vehicles (tractors). Here, the field-to-field route is the target travel path when a work vehicle moves automatically from the entrance / exit A1 of one field to the entrance / exit B2 of another field, and the information regarding the field-to-field route includes position information that shows the trajectory of the target travel path. For example, as shown in Figure 3, the field-to-field route for the first tractor T1 is created as a dotted line, showing a field-to-field route 15 that moves between fields A and B. The control unit S also includes a work route creation means 16 that creates work routes for working in each of the two fields A and B based on field-related information and work vehicle information. The work route consists of a first work route 17 shown as a solid line for tilling work in field A, and a second work route 18 for tilling work in field B. The second work path 18 includes a movement path 18A, shown by a dashed line, which moves from the entrance / exit B1 of field B to the starting position 19 where tilling work in field B begins, and a work path 18B, shown by a solid line, which performs tilling work from the starting position 19 to the entrance / exit B1. The tractor T1 is then moved by automatic operation control by the automatic operation control unit 6 based on the created first work path 17, inter-field path 15, and second work path 18. The remaining two tractors T2 and T3 are similarly moved by automatic operation control by the automatic operation control unit 6 along the work paths of the two fields and the inter-field path between the two fields, which are created by the work path creation means 16 and the inter-field path creation means 14.

[0036] Furthermore, the control unit S is equipped with an operating time calculation means 20 that calculates the operating time of the work vehicles (tractors T1, T2, T3) based on the created work routes, inter-field routes, and work vehicle information. When each work vehicle is made to work in multiple fields (two in this embodiment), the operating time calculation means 20 calculates the operating time of each work vehicle by adding the working time in the two fields and the inter-field travel time when moving from one field to the other after the work is completed. The inter-field travel time is calculated from the distance of the created inter-field route and the travel speed of the work vehicle between fields. The working time in each field is calculated from the distance of the two created work routes and the travel speed of the work vehicle on each work route.

[0037] Figure 4 shows the operating time for each of the three tractors T1, T2, and T3. The operating time for tractor T1 is calculated by adding the working time t11 for tilling in field A, the travel time t12 for moving between fields A and B, and the working time t13 for working in field B. The operating time for tractor T2 is calculated by adding the working time t21 for tilling in field E, the travel time t22 for moving between fields E and F, and the working time t23 for tilling in field F. The operating time for tractor T3 is calculated by adding the working time t31 for puddling in field C, the travel time t32 for moving between fields C and D, and the working time t33 for puddling in field F.

[0038] Looking at the operating times of the three work vehicles (tractors T1, T2, and T3) in Figure 4, we see that the completion time of one of the two tractors T1 and T2 performing the same tilling work differs from the completion time of the other tractor T2 by a predetermined amount of time (e.g., 1 hour). In such cases, the control unit S changes the association between the information of multiple work vehicles and the information of multiple work-related items. Specifically, it swaps at least a portion of the fields in which the two work vehicles (tractors T1 and T2) performing tilling work (the same work) work. For example, it swaps field B, in which the first tractor T1 works, and field E, in which the second tractor T2 works. As a result, the completion time for the first tractor T1 before the change, as shown in Figure 4, was close to 16:00, but after the change, as shown in Figure 5, both the first and second tractors T1 and T2 were able to complete their work at a time significantly shorter than 16:00, ensuring that there is no difference of more than a predetermined time (e.g., 1 hour) between the completion times of the two tractors T1 and T2. Furthermore, as mentioned above, since tractor T2 has a larger working width for its implement and a faster travel speed than tractor T1, swapping field B, which takes a long time, with field E, which takes a short time, can shorten the tilling time.

[0039] Furthermore, the control unit S adds time information to the inter-field routes 15,15. By adding time information, it is possible to determine whether multiple (two in Figure 4) work vehicles (tractors T2, T3) will encounter each other while traveling along the inter-field routes 15,15. If it is determined that the two work vehicles (tractors T2, T3) will encounter each other, the link between the information of the two work vehicles that will encounter each other and the various work-related information is changed. In Figure 4, it is determined that the work vehicles (tractors T2, T3) will encounter each other at 10:30, and the puddling work of tractor T3 in field C and the puddling work in field D are swapped. In other words, the puddling work in field D is performed first and the puddling work in field C is performed later. This makes it possible to avoid the work vehicles (tractors T2, T3) encountering each other. At this time, the operator may be notified whether the collision of the work vehicles (tractors T2, T3) has been avoided. This notification, for example, displays on display device 2 that a collision has been avoided. If a collision between the work vehicles (tractors T2, T3) has not been avoided, an error message may be displayed on display device 2 to notify the worker. If a collision between the work vehicles (tractors T2, T3) has been avoided, the field-to-field route 15 for tractor T3 is recreated after swapping the puddling work in field C and field D for tractor T3.

[0040] Next, we will explain the procedure for creating the travel paths for each of the three tractors T1, T2, and T3, based on the flowchart shown in Figure 6.

[0041] First, field-related information for multiple fields (six in this embodiment) to be worked on is acquired (Step S1). Next, work vehicle information for multiple work vehicles (three vehicles) working in multiple fields is acquired (Step S2), and the control unit S links the multiple work vehicle information with the multiple work-related information (Step S3). In other words, the two tractors T1 and T2 that will perform tilling work are linked to the four fields A, B, E, and F that are scheduled to be tilled. As a result of this linking, the control unit S selects and assigns two of the four fields A, B, E, and F to one tractor T1 using the assignment means 13, and also selects and assigns two of the four fields E, F to the other tractor T2 using the assignment means 13. Furthermore, since there are only two fields scheduled for puddling for one tractor T3, the two fields C and D are selected and assigned using the assignment means 13 (step S4). Based on the information of the two fields for each of the three assigned pairs, a field-to-field route from one field to the other is created based on map information (step S5). Subsequently, a work route for each of the six assigned fields is created based on field-related information (step S6). This completes the creation of the travel routes for each of the three tractors T1, T2, and T3.

[0042] After creating the travel paths for each of the three tractors T1, T2, and T3, the system switches from manual operation mode to automatic operation mode based on a command signal from the remote control device 7, and automatic operation of the three tractors T1, T2, and T3 begins.

[0043] The aforementioned automated driving is controlled by the automated driving control unit 6. In this control, the information necessary for automated driving is used, including detection information from various sensors on the work vehicle side (not shown), various sensors on the work machines R1, R2, and H side (not shown), position information from the positioning device 3, and communication information obtained from the communication device 5. In addition, detection information from the obstacle sensor 9 and image processing information from the camera 10 are also used. When the automated driving control unit 6 detects the presence or absence of an obstacle that would hinder automated driving and work based on the detection information from the obstacle sensor 9 and the image information from the camera 10, it will emergency stop the automated driving of the work vehicle (tractor) and notify the operator that an emergency stop has been performed.

[0044] The embodiments of the present invention have been described above. The present invention is not limited to the embodiments described above. It goes without saying that modifications can be made as appropriate within the scope of the technical idea.

[0045] In the above embodiment, when it was discovered that multiple (two in Figure 4) work vehicles (tractors T2, T3) were going to meet while traveling along the inter-field paths 15, 15, the puddling work of tractor T3 in field C and the puddling work in field D were swapped. However, instead of swapping the puddling work of tractor T3 in field C and the puddling work in field D, the workers may be notified using a notification means. Examples of notification means include buzzers, warning lights, and display units that show messages.

[0046] Furthermore, although three work vehicles were used in the above embodiment, any number of work vehicles, such as two or four or more, may be used. Also, three work vehicles (two tractors for tilling and one tractor for puddling in the embodiment) were provided for two different work tasks (plowing and puddling in the embodiment). In other words, the number of work vehicles was greater than the number of work tasks, but the number of work tasks and the number of work vehicles may be the same, or the number of work vehicles may be even greater than the number of work tasks. Also, although different work tasks (plowing and puddling in the embodiment) were used, multiple work vehicles may be provided and carried out for multiple fields having the same work task (plowing or puddling). In this case, it is necessary to consider the number of fields so that each work vehicle can be assigned to two or more fields.

[0047] Furthermore, if the control unit S determines that multiple (two in Figure 4) work vehicles (tractors T2, T3) will meet while traveling along the inter-field routes 15, 15, it may calculate the width of the farm road at the point of collision from the map information. If the calculated road width is less than or equal to a predetermined width, it may swap the puddling work of tractor T3 in field C with the puddling work in field D. On the other hand, if the calculated road width is greater than the predetermined width, it may determine that the work vehicles can pass each other and modify the inter-field routes of the work vehicles to routes that avoid contact at the point of collision (generate detour routes).

[0048] Furthermore, although a tractor was shown as the work vehicle in the above embodiment, a rice transplanter or a mobile, dedicated fertilizer spreader that only performs fertilization may also be used. [Explanation of symbols]

[0049] 1...Memory unit, 2...Display device, 3...Positioning device, 4...Farm road, 5...Communication device, 6...Automatic driving control unit, 7...Remote control device, 8...Driving mode switching switch, 9...Obstacle sensor, 10...Camera, 11...Buzzer, 12...Audio playback device, 13...Assignment means, 14...Inter-field route creation means, 15...Inter-field route, 16...Work route creation means, 17...First work route, 18...Second work route, 18A...Movement route, 18B...Work Route, 19...Starting position, 20...Means for calculating working time, A~F...Field, A1~F1...Entrance / exit, H...Harrow (implementation device), R1, R2...First and second rotary (implementation devices), S...Control unit, T1, T2, T3...Tractor (working vehicle), t11...Working time, t12...Travel time, t13...Working time, t21...Working time, t22...Travel time, t23...Working time, t31...Working time, t32...Travel time, t33...Working time

Claims

1. Equipped with multiple work vehicles that travel across multiple fields, The control unit acquires field-related information including the location, shape, and entrance / exit information of each of the aforementioned multiple fields; work-related information including information on the work content associated with each of the aforementioned multiple fields; work vehicle information including information on each of the aforementioned multiple work vehicles used to carry out the work content of the aforementioned multiple work-related information; and map information of the area outside the fields including information on farm roads between fields. A work vehicle management system characterized in that the control unit links the plurality of fields corresponding to each of the plurality of work vehicles based on the plurality of work vehicle information and the plurality of work-related information, selects two or more fields from the plurality of fields linked to each of the plurality of work vehicles and assigns them to each work vehicle, and creates an inter-field route for moving the work vehicle from one of the two or more assigned fields to the other field based on the map information.

2. The work vehicle management system according to claim 1, characterized in that when the control unit has each of the plurality of work vehicles work in the two or more fields assigned to it, it calculates the travel time from the distance of the route between the fields and the travel speed of the work vehicle between the fields, creates a work route for each of the two or more fields assigned to it based on the field-related information and the work vehicle information, calculates the work time in the field from the distance of the two or more created work routes and the travel speed of the work vehicle traveling along each work route, and calculates the operating time for each of the plurality of work vehicles by adding the travel time and the work time in the two or more fields.

3. The work vehicle management system according to claim 2, characterized in that the control unit adds time information to the inter-field route and notifies the worker when it is determined from the time information that the multiple work vehicles will come into contact with each other while traveling along the inter-field route.

4. The work vehicle management system according to claim 2 or 3, characterized in that the control unit changes the association between the information of the multiple work vehicles and the information of the multiple work-related information when the difference between the operating time of one of the multiple work vehicles and the operating time of the other work vehicle is greater than or equal to a predetermined time, or when it is found that the multiple work vehicles will come into contact with each other while traveling along the inter-field route.

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