Agricultural working machine

Abstract

To provide an agricultural implement equipped with an efficient mechanism capable of changing from wireless communication to wired connection in communication between a communication terminal and a control device of the implement attached to a tractor and performing agricultural work.SOLUTION: The communication terminal 40 and the control device 20 can communicate with each other by wireless communication, and the communication terminal 40 and the control device 20 can also communicate with each other by wired connection, the communication terminal 40 includes the rechargeable battery unit 252, the connector 230, and the driver 240, and the connector 230 can be connected to the cable 101 used when charging the battery unit 252 and can also be connected to the cable 102 used for wired connection. The driver 240 is a driver for receiving a communication protocol used in the control device 20, and the cable 101 connected to the communication terminal 40 at the time of charging and the cable connected to the communication terminal 40 at the time of wired connection use a cable of the same standard of the data transmission line.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to agricultural implements, and more particularly to agricultural implements including implements that are attached to tractors to perform agricultural work. [Background technology]

[0002] There are some systems that allow communication between a control device equipped on a farm implement attached to a tractor and a communication terminal that can be placed on the tractor, for example, via wireless communication. This allows the worker on the tractor to know the status of the implement and to remotely operate the actuators equipped on the implement. Wireless communication also eliminates the need for wiring for communication between the tractor and the implement.

[0003] Patent document 1 also discloses a display system for agricultural machinery that includes a communication conversion device installed in the tractor and capable of communicating with a display device that can be placed on the tractor, a sensor installed in the agricultural machinery, and a control unit installed in the agricultural machinery that can acquire information from the sensor and communicate with the communication conversion device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-074750 Summary of the Invention [Problem to be solved by the invention]

[0005] If a problem occurs with the wireless communication described above, it is possible to communicate via a wired connection. However, in this case, if a dedicated mechanism used only for the wired connection is provided in advance, separate from the mechanism assumed for wireless communication, it becomes necessary to secure space and connection parts for this in the communication terminal. As a result, the communication terminal becomes larger and costs increase. Furthermore, from a cost perspective, it is preferable to use cables and connection parts that are as versatile as possible. However, it is necessary to support the communication method of the control device on the work machine side, and using dedicated cables and connection parts in this case increases manufacturing and management costs.

[0006] Furthermore, Patent Document 1 does not disclose a specific mechanism for changing from wireless communication to wired connection.

[0007] In view of the above problems, the present invention aims to provide an agricultural work machine equipped with an efficient mechanism that can change communication between a control device of the work machine that is attached to a tractor to perform agricultural work and a communication terminal from wireless communication to a wired connection. [Means for solving the problem]

[0008] In order to achieve the above object, one representative agricultural work machine of the present invention comprises a work machine having a working unit that is attached to a tractor to perform agricultural work, a control device provided on the work machine, and a communication terminal that can be placed on the tractor, wherein communication between the communication terminal and the control device is possible via wireless communication and also between the communication terminal and the control device via a wired connection, the communication terminal comprises a rechargeable battery unit, a connector, and a driver, the connector is connectable to a cable used to charge the battery unit and also to a cable used for the wired connection, the communication protocol used during the wired connection is the communication protocol used by the control device, the driver is a driver for receiving the communication protocol used by the control device, and the cable connected to the communication terminal during charging and the cable connected to the communication terminal during the wired connection use cables of the same standard for data transmission paths. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide an efficient mechanism that can change from wireless communication to wired communication in communication between a control device for a work machine that is attached to a tractor to perform agricultural work and a communication terminal. Problems, configurations, and effects other than those described above will become apparent from the following embodiments. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a block diagram of a first embodiment of an agricultural implement of the present invention during wireless communication. [Figure 2] FIG. 2 is a block diagram of the agricultural work machine according to the first embodiment of the present invention when the communication terminal is being charged. [Figure 3] FIG. 1 is a block diagram of a first embodiment of an agricultural work machine of the present invention when connected by wire. [Figure 4] 1 is a plan view showing an example of a working machine in an agricultural working machine of the present invention. [Figure 5] FIG. 2 is a front view showing an example of a communication terminal in the agricultural work machine of the present invention. [Figure 6]FIG. 2 is a bottom view showing an example of a communication terminal in the agricultural work machine of the present invention. [Figure 7] FIG. 2 is a block diagram showing an example of a communication terminal in the agricultural work machine of the present invention. [Figure 8] FIG. 10 is a block diagram of a second embodiment of an agricultural work machine of the present invention when connected by wire. [Figure 9] FIG. 10 is a block diagram of a third embodiment of an agricultural work machine of the present invention when connected by wire. DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of the present invention will be described.

[0012] First Embodiment (Block diagram of wireless communication in the first embodiment) 1 is a block diagram of a first embodiment of the agricultural work machine of the present invention during wireless communication. In a configuration including a work implement 2 attached to a tractor 1, a communication terminal 40 can be disposed on the tractor 1 side. The work implement 2 also includes a control device 20, a sensor 31, and an actuator 32. Although not shown, the work implement 2 includes a working unit that performs agricultural work.

[0013] The control device 20 includes a control unit 21, an input / output unit 22, a wireless communication unit 23, and a notification unit 24. It is assumed that a power supply for the control device 20 is provided separately, and is therefore not shown in Fig. 1.

[0014] The control unit 21 performs processing to control the actuator 32 using operation signals from the communication terminal 40 and information detected by the sensor 31. It is also possible to transmit control information for the actuator 32 and information from the sensor 31 to the communication terminal 40. It may also detect the state of the work machine 2 based on the control information for the actuator 32 and information from the sensor 31 and transmit that information to the communication terminal 40. The control unit 21 is composed of electronic devices necessary for arithmetic processing, such as a CPU (Central Processing Unit) and memory. The control unit 21 also has a storage unit for recording necessary information.

[0015] The input / output unit 22 performs functions such as supplying power to the actuator 32 under the control of the control unit 21. The input / output unit 22 also receives information from the sensor 31 and sends it to the control unit 21.

[0016] The wireless communication unit 23 has a function (for example, a wireless module) for performing wireless communication R with the wireless communication unit 43 of the communication terminal 40. Alternatively, only the wireless communication unit 23 may be installed in a position where communication is easy.

[0017] The notification unit 24 has a notification function using sound from a speaker or the like. The notification unit 24 can notify using a buzzer sound, voice, or the like. Furthermore, the notification unit 24 may have a notification function using a display. For example, an error message or the contents of control can be displayed on a liquid crystal screen, an organic EL screen, an LED, or the like.

[0018] The sensor 31 is a sensor installed on the side of the work machine 2, and various types of sensors are provided according to the needs of the work machine 2. The sensor 31 is, for example, a potentiometer, a stroke sensor, an acceleration sensor, an angular velocity sensor, an inclination sensor, a geomagnetic sensor, a rotation sensor, a limit switch, etc. This allows the actuator 32 to detect the state of the work machine 2, etc.

[0019] The actuator 32 is installed on the side of the work machine 2. The actuator 32 is, for example, an actuator that makes it possible to move a movable part that is part of the work machine 2 as needed. As the actuator 32, for example, a cylinder such as a hydraulic cylinder or an electric hydraulic cylinder, a motor, etc. can be used.

[0020] The communication terminal 40 includes a display unit 41, an operation unit 42, a wireless communication unit 43, a processing unit 44, an audio output unit 45, and a remote control battery 46. The communication terminal 40 may also include a storage unit as necessary.

[0021] The display unit 41 may include a means for displaying necessary information using a display screen such as a liquid crystal display, an organic electroluminescence display, an LED (light-emitting diode), a lamp, etc. The display unit 41 can acquire information from the control unit 21 of the control device 20 and display information based on the sensor 31 and information based on the control of the actuator 32. It may also display information on operations performed by the operation unit 42.

[0022] The operation unit 42 is provided with operation switches and the like for operation, and allows the operator to perform necessary operations. For example, these are operations for various settings and displaying information on the display unit 41. The operation unit 42 also has switches for operating the actuator 32. Various switches such as push button switches can be used as the switches of the operation unit 42. The operation unit 42 may also be configured by adopting a touch panel system for the display screen of the display unit 41.

[0023] The wireless communication unit 43 has a function for performing wireless communication R with the wireless communication unit 23 of the control device 20 (for example, a wireless module, etc.).

[0024] The processing unit 44 performs display processing on the display unit 41, input processing of signals from the operation unit 42, communication processing for the wireless communication unit 43, audio output processing from the audio output unit 45, power management processing by the remote control battery 46, and other necessary calculation processing, etc. The processing unit 44 is composed of electronic devices, etc. necessary for control, processing, etc.

[0025] The audio output unit 45 has a function of notifying by sound from a speaker, etc. The audio output unit 45 can output by buzzer sound, voice, etc. In this case, the output may be linked to the display on the display unit 41.

[0026] Remote control battery 46 is a battery that serves as the power source for communication terminal 40, and can supply power to display unit 41, operation unit 42, wireless communication unit 43, processing unit 44, and audio output unit 45. Remote control battery 46 can be configured, for example, to use a secondary battery and perform power management for the secondary battery. Remote control battery 46 can be charged using the method shown in Fig. 2, which will be described later.

[0027] 1, this configuration enables wireless communication R between the communication terminal 40 arranged on the tractor 1 and the control device 20 of the work implement 2. Under normal circumstances, this allows the operation unit 42 of the communication terminal 40 to be operated to remotely operate the actuator 32 of the work implement 2. In addition, information obtained by controlling the sensor 31 and the actuator 32 can be displayed on the display unit 41 of the communication terminal 40.

[0028] (Block diagram of the communication terminal during charging according to the first embodiment) FIG. 2 is a block diagram of the agricultural work machine according to the first embodiment of the present invention when the communication terminal is being charged.

[0029] The communication terminal 40 is powered by a remote control battery 46, but when the battery capacity decreases, it becomes necessary to charge it. Figure 2 is a block diagram showing the state during charging.

[0030] The power supply unit 10 may be, for example, a power supply unit provided in the tractor 1. The power supply unit 10 may also use an external power source other than this.

[0031] The cable 101 is a cable that includes wiring that connects the communication terminal 40 and the power supply unit 10. A first connection unit 101a at one end of the cable 101 is connected to the communication terminal 40. A second connection unit 101b at the other end of the cable 101 is connected to the power supply unit 10. Within the cable 101, the first connection unit 101a and the second connection unit 101b are connected by a power line (wiring for supplying power).

[0032] Here, cable 101 can be a cable conforming to the USB (Universal Serial Bus) standard, which is a standard for data transmission paths. Therefore, first connection unit 101a and second connection unit 101b can also use USB standard connectors, and for example, first connection unit 101a can use a Micro USB or Type-C connector, and second connection unit 101b can use a Type-A or Type-C connector. In this case, power supply unit 10 uses a charger conforming to the USB standard.

[0033] With this configuration, in FIG. 2, power is supplied from the power supply unit 10 and charged in the remote control battery 46 of the communication terminal 40.

[0034] (Block diagram of the first embodiment when connected via wire) FIG. 3 is a block diagram of the agricultural work machine according to the first embodiment of the present invention when connected by wire.

[0035] When wireless communication R between the communication terminal 40 and the control device 20 becomes unavailable or is not used intentionally, the communication terminal 40 and the control device 20 are connected by wire and communication is performed by wire. This state is shown in FIG.

[0036] 3 shows an example of a wired connection using cables 102 and 103. When connectors are used at the connection points of these cables, detachable connectors can be used. Note that the second connection point 102b of cable 102 and the first connection point 103a of cable 103 are connected on the work machine 2 side.

[0037] Cable 102 is a cable equipped with wiring for connecting communication terminal 40 and cable 103. First connection portion 102a at one end of cable 102 is connected to communication terminal 40, and second connection portion 102b at the other end of cable 102 is connected to first connection portion 103a of cable 103. Within cable 102, first connection portion 102a and second connection portion 102b are connected by a signal line (wiring for signal communication).

[0038] The cable 103 is a cable equipped with wiring for connecting the cable 102 and the control device 20. A first connection portion 103a at one end of the cable 103 is connected to a second connection portion 102b of the cable 102, and a second connection portion 103b at the other end of the cable 103 is connected to the control device 20. Within the cable 103, the first connection portion 103a and the second connection portion 103b are connected by a signal line.

[0039] The cables 102 and 103 communicate using a communication protocol used in the control device 20. In tractors, a CAN (Controller Area Network) communication protocol (serial communication protocol) is often used, and for example, the control device 20 also uses the CAN standard. In this case, the cables 102 and 103 communicate using CAN.

[0040] On the other hand, a USB-standard cable can be used for the cable 102. Therefore, the first connection unit 102a and the second connection unit 102b can also use USB-standard connectors, and for example, the first connection unit 102a can use a Micro USB or Type-C connector, and the second connection unit 102b can use a Type-A or Type-C connector.

[0041] Furthermore, a USB-standard cable or a CAN communication cable can be used for cable 103. First connection unit 103a is a connector that is connected to second connection unit 102b of cable 102. Therefore, first connection unit 103a uses a connector of the same standard and type (e.g., Type-A or Type-C of the USB standard) as second connection unit 102b of cable 102. Second connection unit 103b is a connection unit that is connected to control device 20, and may use a connector or may be directly connected to control device 20.

[0042] Here, the second connection unit 103b may be a USB standard connector (for example, USB standard Type-A or Type-C) or a connector for CAN communication (for example, a connector specified by the Japan Agricultural and Industrial Technology Agency AG-PORT). When the cable 103, the first connection unit 103a, and the second connection unit 103b are USB standard cables and connectors, an existing USB cable can be used.

[0043] Communication between the communication terminal 40 and the control device 20 via a wired connection can be initiated when a specific operation is performed on the operation unit 42 of the communication terminal 40 after the wired connection is established. At this time, stopping the wireless communication can prevent mixing of control with wireless communication. Also, if an identification signal (e.g., an identifier) ​​can be transmitted via each cable 102, 103, this may be used. In this case, when the communication terminal 40 receives an identification signal for the wired connection from the control device 20, the wireless communication is canceled and communication via the wired connection is initiated.

[0044] With this configuration, in FIG. 3, the communication terminal 40 arranged on the tractor 1 and the control device 20 of the work implement 2 are connected by wire, and communication similar to that in wireless communication R is possible.

[0045] (Example of a work machine) Figure 4 is a plan view showing an example of a work machine in the agricultural work machine of the present invention. Here, a foldable tillage work machine 50 is shown as the work machine 2. The upward direction in Figure 3 is the front direction of the tillage work machine 50, and the left and right direction in Figure 3 is the left and right direction of the tillage work machine 50.

[0046] The tillage implement 50 comprises a central working unit 60 that is attached to the tractor 1 to perform tilling work, and extension working units 61 that can be positioned to extend the working unit on both sides of the central working unit 60. The extension working units 61 are rotatably attached to the ends of the central working unit 60 and can be folded relative to the central working unit 60. The central working unit 60 is provided with a mast 51a and left and right lower pins 51b that form the attachment unit 51, and the tillage implement 50 is attached to the rear of the tractor 1 via these.

[0047] PTO (Power Take Off) power from the tractor 1 is input via an input shaft located at the front, and the tilling unit equipped with puddling tines rotates inside the cover 55 and the first soil leveling unit 56 located behind it, breaking up the soil. The soil surface is then flattened by the first soil leveling unit 56 and the second soil leveling unit 57 located behind it. Puddling is performed in this manner. The cover 55, first soil leveling unit 56, second soil leveling unit 57, and tilling unit are configured to include both a central working unit 60 and an extension working unit 61.

[0048] By contracting the left and right opening / closing cylinders 62, the left and right pivot mechanisms 70 are activated, respectively, and the extension working units 61 on both sides can be folded inward relative to the central working unit 60, thereby shortening the overall width of the tillage implement 50. Furthermore, by extending the left and right opening / closing cylinders 62, the tillage implement 50 can be placed in an unfolded state. The opening / closing cylinders 62 correspond to the actuator 32 described in FIG. 1 and are actuators for operating the extension working units 61 so that they can be switched between a working state and a stored state. Furthermore, the tillage implement 50 is equipped with locking mechanisms 80 on each side that lock (fix) the left and right extension working units 61 relative to the central working unit 60 when in the unfolded state shown in FIG. 4.

[0049] The tillage implement 50 is also equipped with an extended soil leveling body drive device 65 that opens and closes the extended soil leveling bodies 59 at both ends, a second soil leveling body drive device 66 that switches the first soil leveling body 56 and the second soil leveling body 57 between a soil pulling state and a soil leveling state, and a pressure device 67 that energizes the first soil leveling body 56 and the second soil leveling body 57. Here, the extended soil leveling body drive device 65 (motor), the second soil leveling body drive device 66 (motor), and the pressure device 67 (motor) can be applied as actuators 32.

[0050] The control box 63 is provided above the cover 55 located above the tilling section of the central working unit 60. In FIG. 4, the control box 63 is fixed to the front of the frame 58 provided above the cover 55. The control device 20 shown in FIG. 1 is stored inside the control box 63, and is equipped with the control unit 21, wireless communication unit 23, notification unit 24, etc. The control box 63 can have dustproof and waterproof functions. The sensor cover 64 covers the sensor 31 shown in FIG. 1, and in this case the sensor 31 can be configured with a sensor (e.g., a potentiometer) that can detect the rotation of the extension working unit 61 and the locking of the locking mechanism 80.

[0051] (An example of a communication terminal) 5 is a front view showing an example of a communication terminal in an agricultural work machine of the present invention, showing a remote control device 200 as an example of communication terminal 40 of FIGS.

[0052] Remote control device 200 is provided with switch 201, which corresponds to operation unit 42 in Figures 1 to 3, and includes push button switches 201a to 201q. Also, at the center of the top of switch 201, is provided display unit 202, which corresponds to display unit 41 in Figures 1 to 3.

[0053] Switch 201a is a power switch for remote control device 200. Switch 201b is a switch for switching the display content of display unit 202. Switch 201c is a mode changeover switch. Switch 201d is a switch for setting. Switch 201k is a switch for confirming selected content, etc. When setting, switches 201e, 201f, 201i, and 201j can be used as switches for selecting options displayed on display unit 202.

[0054] Switch 201e is a switch that opens the extension work unit 61. When this switch is pressed, the opening / closing cylinders 62 on both sides are actuated, and the extension work units 61 on both sides are opened and deployed as shown in FIG. 4. If switch 201e is pressed within a predetermined time after pressing switch 201g, or before pressing switch 201g and performing a release operation to release the operation, only the left opening / closing cylinder 62 is actuated, and the left extension work unit 61 is opened. If switch 201e is pressed within a predetermined time after pressing switch 201h, or before pressing switch 201h and performing a release operation to release the operation, only the right opening / closing cylinder 62 is actuated, and the right extension work unit 61 is opened.

[0055] Switch 201f is a switch that closes the extension work unit 61. When this switch is pressed, the opening / closing cylinders 62 on both sides are actuated, and both extension work units 61 are closed and folded. If switch 201f is pressed within a predetermined time after pressing switch 201g, or before pressing switch 201g and performing a release operation to release the operation, only the left opening / closing cylinder 62 is actuated, and the left extension work unit 61 is closed. If switch 201f is pressed within a predetermined time after pressing switch 201h, or before pressing switch 201h and performing a release operation to release the operation, only the right opening / closing cylinder 62 is actuated, and the right extension work unit 61 is closed.

[0056] Switch 201i is a switch for turning on the pressure of the pressure device 67. Switch 201j is a switch for turning off the pressure of the pressure device 67. Switch 201l is a switch for opening the left extension ground leveling body 59 using the left extension ground leveling body drive device 65. Switch 201m is a switch for closing the left extension ground leveling body 59 using the left extension ground leveling body drive device 65. Switch 201n is a switch for opening the right extension ground leveling body 59 using the right extension ground leveling body drive device 65. Switch 201o is a switch for closing the right extension ground leveling body 59 using the right extension ground leveling body drive device 65. Switch 201p is a switch for leveling the first ground leveling body 56 and the second ground leveling body 57 using the second ground leveling body drive device 66. The switch 201q is a switch that causes the second ground leveling body driving device 66 to put the first ground leveling body 56 and the second ground leveling body 57 into a soil pulling state.

[0057] The display unit 202 can be an LCD screen or an organic EL screen. The display unit 202 can display the status of each of the left and right extension working units 61, as well as operation completion indications, error indications, caution and warning indications, and operation guide indications. The status of the extension working units 61 can be a stored state, a working (deployed) state, or an intermediate state between these. Furthermore, it can also display whether the locking mechanism 80 is in a locked state. In addition, the display unit 202 can display various information related to operations, settings, and the tillage working implement 50 (work implement 2).

[0058] 6 is a bottom view showing an example of a communication terminal in an agricultural machine according to the present invention, which corresponds to a view of FIG. 5 viewed from below.

[0059] Waterproof cover 220 is attached to the bottom of remote control device 200, and has USB connector 230 behind it. Waterproof cover 220 has main body 221, connecting part 222, and fixing part 223. Main body 221 of waterproof cover 220 covers USB connector 230, ensuring waterproofness and dustproofness when not connected, such as during wireless communication.

[0060] Waterproof cover 220 can be removed by placing a finger in recess 225 provided on the side of waterproof cover 220, thereby removing main body 221 of waterproof cover 220 and revealing USB connector 230. Waterproof cover 220 is elastically deformable and is fixed to fixing part 223 via thin arm-like connecting part 222 connected to the end of main body 221. This makes it possible to remove main body 221 and prevents it from being lost due to dropping, etc.

[0061] FIG. 7 is a block diagram showing an example of a communication terminal in an agricultural work machine of the present invention.

[0062] As shown in FIG. 7, the remote control device 200 includes a display unit 41, an operation unit 42, a wireless communication unit 43, a processing unit 44, an audio output unit 45, a remote control battery 46, a waterproof cover 220, a USB connector 230, and a CAN driver 240.

[0063] Display unit 41 is the same as display unit 41 described with reference to FIGS. 1 to 3, and corresponds to display unit 202 of remote control device 200.

[0064] The operation unit 42 is similar to the operation unit 42 described with reference to FIGS. 1 to 3, and corresponds to the switch 201 of the remote control device 200.

[0065] Wireless communication unit 43 is similar to wireless communication unit 43 described with reference to FIGS. 1 to 3, and is placed in an appropriate location on remote control device 200, such as on top of remote control device 200.

[0066] The processing unit 44 is similar to the processing unit 44 described in Figures 1 to 3, but is shown more specifically in Figure 7. In addition to the functions described in Figures 1 to 3, the processing unit 44 performs the exchange of information with the CAN driver 240, the control processing of the charge management unit 251, the processing of acquiring information from the charge management unit 251, etc.

[0067] Audio output unit 45 is similar to audio output unit 45 described with reference to FIGS. 1 to 3, and is placed in an appropriate location on remote control device 200, such as on the back of remote control device 200.

[0068] The remote control battery 46 is similar to the remote control battery 46 described in Figures 1 to 3, but is shown more specifically in Figure 7. The remote control battery 46 includes a charge management unit 251 and a battery unit 252. The charge management unit 251 controls charging of the battery unit 252 through control processing by the processing unit 44. The battery unit 252 is a rechargeable battery such as a secondary battery.

[0069] USB connector 230 is a USB connector provided at the back of waterproof cover 220. A USB standard connector can be used for USB connector 230, such as a Micro USB or Type-C female connector. When a USB standard connector is connected to USB connector 230, the power line of the connected cable is connected to power line 301, and the signal line is connected to signal line 302.

[0070] The CAN driver 240 reads CAN data (data in CAN communication), converts it into data that can be processed by the processing unit 44, and transmits the converted data to the processing unit 44. The CAN driver 240 also receives data from the processing unit 44, converts the received data into CAN data, and transmits it.

[0071] The USB connector 230, the CAN driver 240, the charging management unit 251, and the battery unit 252 are connected via a power line 301 that branches off midway. The USB connector 230 and the CAN driver 240 are connected via a signal line 302. The CAN driver 240 and the processing unit 44 are connected via a power line 311 and a signal line 312. The processing unit 44 and the charging management unit 251 are connected via a signal line 322.

[0072] (Connection to the remote control device in the first embodiment) The state of remote control device 200 in Fig. 7 during wireless communication as described in Fig. 1 will be described. In the state of Fig. 1, nothing is connected to USB connector 230 of remote control device 200. Therefore, power for remote control device 200 is supplied from battery unit 252 via power lines 301, 311, etc. to processing unit 44, display unit 41, operation unit 42, wireless communication unit 43, and audio output unit 45. Furthermore, signals (information) are exchanged with control device 20 via wireless communication unit 43, and signal processing is performed by processing unit 44.

[0073] 7 will be described in the state during charging described with reference to FIG. 2. In the state of FIG. 2, first connection portion 101a of cable 101 is connected to USB connector 230 of remote control device 200. Power from power supply unit 10 is supplied to USB connector 230 of remote control device 200 via cable 101. The power supplied to USB connector 230 is sent to battery unit 252 via power line 301 and charging management unit 251, and is charged in battery unit 252. Furthermore, power from power supply unit 10 may be supplied to processing unit 44, display unit 41, operation unit 42, wireless communication unit 43, and audio output unit 45 via cable 101, USB connector 230, power lines 301, 311, etc.

[0074] A description will be given of the state of remote control device 200 in Fig. 7 when connected by wire as described in Fig. 3. In the state of Fig. 3, first connection portion 102a of cable 102 is connected to USB connector 230 of remote control device 200.

[0075] Wired communication between the communication terminal 40 and the control device 20 can be initiated by performing a specific operation on the operation unit 42 (switch 201) of the communication terminal 40 after connecting the cables 102 and 103. For example, this can be done by pressing multiple specific switches 201, pressing multiple specific switches 201 for a predetermined period of time or longer, or selecting wired connection mode using switch 201c or the like. At this time, stopping wireless communication can prevent the mixing of wireless communication and control. Furthermore, if an identification signal (e.g., an identifier) ​​can be transmitted via each cable 102 or 103, this signal can be used. In this case, when the processing unit 44 of the communication terminal 40 receives an identification signal for wired connection from the control device 20, the wireless communication is canceled and communication via the wired connection is initiated. In other words, priority is given to communication via the wired connection. The identification signal may be received by the processing unit 44 of the communication terminal 40 via signal lines 302 and 312, or may be received by the processing unit 44 of the communication terminal 40 via a separate identification signal line (not shown) that is not used for CAN communication.

[0076] In wired communication, CAN data from the control device 20 is transmitted to the USB connector 230 of the remote control device 200 via the cables 103 and 102. The CAN data transmitted to the USB connector 230 is then sent to the CAN driver 240 via a signal line 302. The CAN driver 240 reads the transmitted CAN data, converts the read data into data that can be processed by the processing unit 44, and transmits the data to the processing unit 44. At this time, the transmission to the processing unit 44 is performed via a signal line 312.

[0077] On the other hand, data from the processing unit 44 is sent to the CAN driver 240 via signal line 312. The CAN driver 240 converts the sent data into CAN data and sends it to the USB connector 230 via signal line 302. The data sent to the USB connector 230 is sent to the control device 20 via cables 102 and 103.

[0078] Power for the remote control device 200 is supplied from the battery unit 252 to the processing unit 44, the display unit 41, the operation unit 42, the wireless communication unit 43, and the audio output unit 45 via power lines 301, 311, and the like.

[0079] (Effects of the first embodiment) According to the first embodiment described above, the USB connector 230 for charging can be used as a connector for communication during a wired connection, reducing space and costs and providing an efficient mechanism. In this case, a CAN driver can be used to enable CAN communication data to be sent and received using a USB-standard cable and connector, making it possible to comply with the CAN standard, which is widely used in agricultural machinery. This reduces the cost of cables and connectors and enables data communication that is resistant to noise.

[0080] <Second embodiment> (Block diagram of the second embodiment when connected via wire) 8 is a block diagram of a second embodiment of the agricultural work machine of the present invention when connected by wire. In the second embodiment, differences from the first embodiment will be mainly described, and the same parts will be assigned the same reference numerals, and explanations of parts that are not particularly described will be omitted.

[0081] When wireless communication R between the communication terminal 40 and the control device 20 becomes unavailable or is not intended to be used, the communication terminal 40 and the control device 20 are connected by wire to perform wired communication. This state is shown in FIG. 8. The wired connection in FIG. 8 shows an example in which the communication terminal 40 and the control device 20 are connected by wire, and at the same time, the power supply unit 10 and the tractor control device 11 are also connected. Note that the states of the communication terminal 40 and the control device 20 during wireless communication and when the communication terminal is being charged are the same as the states of the communication terminal 40 and the control device 20 in the first embodiment (FIGS. 1 and 2).

[0082] The power supply unit 10 is the same as the power supply unit 10 described with reference to FIG.

[0083] The tractor control device 11 is a device that performs processing for controlling the tractor 1, and a device that is already installed in the tractor 1 can be used. The tractor control device 11 is capable of outputting information related to the tractor 1. Examples of the information related to the tractor 1 include the speed of the tractor 1, the rotation speed of the PTO of the tractor 1, and the height of the lifting device that raises and lowers the work implement 2 on the tractor 1. The tractor control device 11 may also have a function to input a signal from an external source and change the control of the tractor based on that signal. The tractor control device 11 is composed of electronic devices and the like required for control, processing, etc.

[0084] 8 shows an example of connection using cables 104, 105, 106, and 107. When connectors are used at the connection points of these cables, detachable connectors can be used. Note that the third connection point 104c of cable 104 and the first connection point 105a of cable 105, and the second connection point 105b of cable 105 and the connection point 106a of cable 106 are connected on the tractor 1 side, and the third connection point 105c of cable 105 and the first connection point 107a of cable 107 are connected on the work implement 2 side.

[0085] Cable 104 is a cable that includes wiring for connecting communication terminal 40, power supply unit 10, and cable 105. For this reason, cable 104 branches midway and has three ends. A first connection portion 104a at the first end of cable 104 is connected to communication terminal 40. A second connection portion 104b at the second end of cable 104 is connected to power supply unit 10. A third connection portion 104c at the third end of cable 104 is connected to first connection portion 105a of cable 105. Within cable 104, first connection portion 104a and second connection portion 104b are connected by a power line, and first connection portion 104a and third connection portion 104c are connected by a signal line.

[0086] Cable 105 is a cable that includes wiring for connecting cables 104, 106, and 107. Therefore, cable 105 branches midway and has three ends. A first connection portion 105a at the first end of cable 105 is connected to a third connection portion 104c of cable 104. A second connection portion 105b at the second end of cable 105 is connected to a connection portion 106a of cable 106. A third connection portion 105c at the third end of cable 105 is connected to a first connection portion 107a of cable 107. Within cable 105, first connection portion 105a, second connection portion 105b, and third connection portion 105c are each connected to each other by a signal line.

[0087] The cable 106 is a cable that is connected to the tractor control device 11, and has a connection part 106a at the end opposite to the tractor control device 11. Within the cable 106, the tractor control device 11 side and the connection part 106a are connected by a signal line.

[0088] Cable 107 is a cable that includes wiring that connects cable 105 and control device 20. A first connection portion 107a at one end of cable 107 is connected to a third connection portion 105c of cable 105. A second connection portion 107b at the other end of cable 107 is connected to control device 20. Within cable 107, first connection portion 107a and second connection portion 107b are connected by a signal line.

[0089] The cables 104, 105, 106, and 107 perform communication using a communication protocol used by the tractor control device 11 and the control device 20. The CAN communication protocol is often used in tractors, and for example, the tractor control device 11 and the control device 20 also use the CAN standard. In this case, communication according to CAN is performed through the signal lines of the cables 104, 105, 106, and 107.

[0090] On the other hand, a USB-standard cable can be used for cable 104. Therefore, USB-standard connectors can be used for first connection unit 104a, second connection unit 104b, and third connection unit 104c. For example, a Micro USB or Type-C connector can be used for first connection unit 104a, and a Type-A or Type-C connector can be used for second connection unit 104b and third connection unit 104c.

[0091] Furthermore, a cable conforming to the USB standard can be used for cable 105, or a cable for CAN communication can also be used. First connection portion 105a is a connector that is connected to second connection portion 104b of cable 104. Therefore, first connection portion 105a uses the same type of connector (for example, Type-A or Type-C of the USB standard) as third connection portion 104c of cable 104. Second connection portion 105b is a connector that is connected to connection portion 106a of cable 106. Therefore, second connection portion 105b uses the same type of connector as connection portion 106a of cable 106. Third connection portion 105c is a connector that is connected to first connection portion 107a of cable 107. Therefore, third connection portion 105c uses the same type of connector as first connection portion 107a of cable 107.

[0092] The connectors of the second connection part 105b and the third connection part 105c may be a USB standard connector (for example, USB standard Type-A or Type-C) or a connector for CAN communication (for example, a connector specified by the Japan Agriculture and Forestry Agency AG-PORT). If the specifications of the tractor 1 dictate that the connection part 106a of the cable 106 use a connector for CAN communication, then the second connection part 105b of the cable 105 will use a connector for CAN communication.

[0093] Furthermore, a USB-standard cable or a cable for CAN communication can be used for cable 107. First connection portion 107a is a connector that is connected to third connection portion 105c of cable 105. Therefore, first connection portion 107a uses the same type of connector as third connection portion 105c of cable 105. Second connection portion 107b is a connection portion that is connected to control device 20, and a connector can be used, or second connection portion 107b can be directly connected to control device 20.

[0094] Here, the connectors of first connection portion 107a and second connection portion 107b may be USB standard connectors (e.g., USB Type-A or Type-C) or connectors for CAN communication (e.g., connectors specified by the Japan Agricultural and Industrial Technology Agency AG-PORT). If third connection portion 105c of cable 105 uses a USB standard connector, then first connection portion 107a of cable 107 will use a USB standard connector. Here, if cable 107, first connection portion 107a, and second connection portion 107b use USB standard cables and connectors, existing USB cables and connectors can be used.

[0095] (Connection to a remote control device in the second embodiment) The state of remote control device 200 in Fig. 7 when connected by wire as described in Fig. 8 will now be described. In the state of Fig. 8, first connection portion 104a of cable 104 is connected to USB connector 230 of remote control device 200.

[0096] Wired communication between the communication terminal 40 and the control device 20 may be initiated when a specific operation is performed on the operation unit 42 (switch 201) of the communication terminal 40 after the cables 104, 105, and 107 are connected. For example, multiple specific switches 201 may be pressed, multiple specific switches 201 may be pressed for a predetermined period of time or longer, or wired connection mode may be selected using switch 201c or the like. At this time, wireless communication may be stopped to prevent mixing of wireless communication and control. Furthermore, if an identification signal (e.g., an identifier) ​​can be transmitted via each cable 104, 105, and 107, this may be used. In this case, when the processing unit 44 of the communication terminal 40 receives an identification signal for wired connection from the control device 20, wireless communication is canceled and wired communication is initiated. In other words, wired communication is given priority. The above-mentioned identification signal may be received by the processing unit 44 of the communication terminal 40 via signal lines 302, 312, or may be received by the processing unit 44 of the communication terminal 40 via a separate identification signal line (not shown) that is not used for CAN communication.

[0097] The CAN data from the control device 20 is transmitted to the USB connector 230 of the remote control device 200 via cables 107, 105, and 104. Also, the CAN data from the tractor control device 11 is transmitted to the USB connector 230 of the remote control device 200 via cables 106, 105, and 104. The CAN data transmitted to the USB connector 230 is sent to the CAN driver 240 via signal line 302. The CAN driver 240 reads the transmitted CAN data, converts the read data into data that can be processed by the processing unit 44, and transmits the data to the processing unit 44. At this time, the transmission to the processing unit 44 is performed via signal line 312.

[0098] On the other hand, data from the processing unit 44 is sent to the CAN driver 240 via signal line 312. The CAN driver 240 converts the sent data into CAN data and sends it to the USB connector 230 via signal line 302. The data sent to the USB connector 230 is sent to the control device 20 via cables 104, 105, and 107. Furthermore, as necessary, the data sent to the USB connector 230 is sent to the tractor control device 11 via cables 104, 105, and 106.

[0099] Power for remote control device 200 is supplied from power supply unit 10 to USB connector 230 of remote control device 200 via cable 104. The power supplied to USB connector 230 is sent to battery unit 252 via power line 301 and charge management unit 251, and is charged in battery unit 252. Furthermore, the power supplied to USB connector 230 may be supplied to processing unit 44, display unit 41, operation unit 42, wireless communication unit 43, and audio output unit 45 via power lines 301, 311, etc.

[0100] (Effects of the second embodiment) The second embodiment described above has the following advantages in addition to the advantages of the first embodiment. Since the power supply unit 10 is connected at the same time as the communication terminal 40 and the control device 20 are wired together, the communication terminal 40 (remote control device 200) can be charged and power for the communication terminal 40 (remote control device 200) can be secured. Furthermore, since the tractor control device 11 is also connected at the same time as the communication terminal 40 and the control device 20 are wired together, data can be exchanged between the communication terminal 40, the tractor control device 11, and the control device 20. Therefore, for example, the control device 20 can perform control taking into account information from the tractor control device 11.

[0101] <Third embodiment> (Block diagram of the third embodiment when connected via wire) 9 is a block diagram of a third embodiment of the agricultural work machine of the present invention when connected by wire. In the third embodiment, differences from the first and second embodiments will be mainly described, and the same parts will be assigned the same reference numerals, and explanations of parts that are not particularly described will be omitted.

[0102] When wireless communication R between the communication terminal 40 and the control device 20' becomes unavailable or is not intended to be used, the communication terminal 40 and the control device 20' are connected via a wired connection to perform wired communication. This state is shown in FIG. 9. The wired connection in FIG. 9 shows an example in which the communication terminal 40 and the control device 20' are connected via a wired connection and also to the tractor control device 11. Note that the states of the communication terminal 40 and the control device 20' during wireless communication and when the communication terminal is being charged are the same as the states of the communication terminal 40 and the control device 20 of the first embodiment (FIGS. 1 and 2).

[0103] The tractor control device 11 is the same as the tractor control device 11 described with reference to FIG.

[0104] The control device 20' includes a power supply unit 25 in addition to the control device 20 described in Fig. 1. The power supply unit 25 is supplied with power from an external power source of the tractor 1 or a separate battery, and can also supply the supplied power to the outside.

[0105] 9 shows an example in which cables 108, 105', 106, and 107' are used for connection. When connectors are used at the connection points of these cables, detachable connectors can be used. Note that the second connection point 108b of cable 108 and the first connection point 105a of cable 105', and the second connection point 105b of cable 105' and the connection point 106a of cable 106 are connected on the tractor 1 side, and the third connection point 105c of cable 105' and the first connection point 107a of cable 107' are connected on the work implement 2 side.

[0106] Cable 108 is a cable equipped with wiring for connecting communication terminal 40 and cable 105'. A first connection portion 108a at one end of cable 108 is connected to communication terminal 40. A second connection portion 108b at the other end of cable 108 is connected to first connection portion 105a of cable 105'. Within cable 108, first connection portion 108a and second connection portion 108b are connected by a power line and a signal line.

[0107] Cable 105' is a cable equipped with wiring for connecting cable 108, cable 106, and cable 107'. Therefore, cable 105' branches midway and has three ends. A first connection portion 105a at the first end of cable 105' is connected to a second connection portion 108b of cable 108. A second connection portion 105b at the second end of cable 105' is connected to a connection portion 106a of cable 106. A third connection portion 105c at the third end of cable 105' is connected to a first connection portion 107a of cable 107'. Within cable 105', first connection portion 105a, second connection portion 105b, and third connection portion 105c are each connected to one another by a signal line. Furthermore, within cable 105', first connection portion 105a and third connection portion 105c are connected to one another by a power line.

[0108] The cable 107' is a cable having wiring that connects the cable 105' and the control device 20'. A first connection portion 107a at one end of the cable 107' is connected to a third connection portion 105c of the cable 105'. A second connection portion 107b at the other end of the cable 107' is connected to the control device 20'. Within the cable 107', the first connection portion 107a and the second connection portion 107b are connected by a power line and a signal line.

[0109] The cables 108, 105', 106, and 107' perform communication using a communication protocol used by the tractor control device 11 and the control device 20'. The CAN communication protocol is often used in tractors, and for example, the tractor control device 11 and the control device 20' also use the CAN standard. In this case, communication according to CAN is performed through the signal lines in the cables 108, 105', 106, and 107'.

[0110] On the other hand, a USB-standard cable can be used for the cable 108. Therefore, both the first connection unit 108a and the second connection unit 108b can use USB-standard connectors. For example, the first connection unit 108a can use a Micro USB or Type-C connector, and the second connection unit 108b can use a Type-A or Type-C connector.

[0111] Furthermore, cable 105' can be a USB-standard cable, or a CAN communication cable. First connection portion 105a is a connector that is connected to second connection portion 108b of cable 108. Therefore, first connection portion 105a uses the same type of connector (for example, Type-A or Type-C of the USB standard) as third connection portion 108c of cable 108. Second connection portion 105b is a connector that is connected to connection portion 106a of cable 106. Therefore, second connection portion 105b uses the same type of connector as connection portion 106a of cable 106. Third connection portion 105c is a connector that is connected to first connection portion 107a of cable 107'. Therefore, third connection portion 105c uses the same type of connector as first connection portion 107a of cable 107'.

[0112] Here, the connectors of the second connection part 105b and the third connection part 105c may be a USB standard connector (for example, USB standard Type-A or Type-C) or a connector for CAN communication (for example, a connector specified by the Japan Agriculture and Forestry Agency AG-PORT). If the specifications of the tractor 1 dictate that the connection part 106a of the cable 106 use a connector for CAN communication, then the second connection part 105b of the cable 105' will use a connector for CAN communication.

[0113] Furthermore, the cable 107' may be a USB-standard cable or a cable for CAN communication. The first connection portion 107a is a connector that is connected to the third connection portion 105c of the cable 105'. Therefore, the first connection portion 107a uses the same type of connector as the third connection portion 105c of the cable 105'. The second connection portion 107b is a connection portion that is connected to the control device 20', and may use a connector or may be directly connected to the control device 20'.

[0114] Here, the connectors of first connection portion 107a and second connection portion 107b may be USB standard connectors (e.g., USB Type-A or Type-C) or connectors for CAN communication (e.g., connectors specified by the Japan Agricultural and Industrial Technology Agency AG-PORT). If third connection portion 105c of cable 105' uses a USB standard connector, then first connection portion 107a of cable 107' will use a USB standard connector. Here, if cable 107', first connection portion 107a, and second connection portion 107b use USB standard cables and connectors, existing USB cables and connectors can be used.

[0115] (Connection to a remote control device in the third embodiment) The state of remote control device 200 in Fig. 7 when connected by wire as described in Fig. 9 will now be described. In the state of Fig. 9, first connection portion 108a of cable 108 is connected to USB connector 230 of remote control device 200.

[0116] Wired communication between the communication terminal 40 and the control device 20′ can be initiated by performing a specific operation on the operation unit 42 (switch 201) of the communication terminal 40 after connecting the cables 108, 105′, and 107′. For example, the operation can be performed by pressing multiple specific switches 201, pressing multiple specific switches 201 for a predetermined period of time or longer, or selecting wired connection mode using switch 201c or the like. At this time, stopping wireless communication can prevent mixing of wireless communication and control. Furthermore, if an identification signal (e.g., an identifier) ​​can be transmitted via each cable 108, 105′, and 107′, this signal can be used. In this case, when the processing unit 44 of the communication terminal 40 receives an identification signal for wired connection from the control device 20′, the wireless communication is canceled and communication via wired connection is initiated. In other words, priority is given to communication via wired connection. The above-mentioned identification signal may be received by the processing unit 44 of the communication terminal 40 via signal lines 302, 312, or may be received by the processing unit 44 of the communication terminal 40 via a separate identification signal line (not shown) that is not used for CAN communication.

[0117] The CAN data from the control device 20' is transmitted to the USB connector 230 of the remote control device 200 via cables 107', 105', and 108. Also, the CAN data from the tractor control device 11 is transmitted to the USB connector 230 of the remote control device 200 via cables 106, 105', and 108. The CAN data transmitted to the USB connector 230 is sent to the CAN driver 240 via signal line 302. The CAN driver 240 reads the transmitted CAN data, converts the read data into data that can be processed by the processing unit 44, and transmits the data to the processing unit 44. At this time, the transmission to the processing unit 44 is performed via signal line 312.

[0118] Meanwhile, data from the processing unit 44 is sent to the CAN driver 240 via signal line 312. The CAN driver 240 converts the sent data into CAN data and sends it to the USB connector 230 via signal line 302. The data sent to the USB connector 230 is sent to the control device 20' via cables 108, 105', and 107'. Furthermore, if necessary, the data sent to the USB connector 230 is sent to the tractor control device 11 via cables 108, 105', and 106.

[0119] Power for remote control device 200 is supplied from power supply unit 25 of control device 20' to USB connector 230 of remote control device 200 via cables 107', 105', and 108. The power supplied to USB connector 230 is sent to battery unit 252 via power line 301 and charge management unit 251, and is charged in battery unit 252. Furthermore, the power supplied to USB connector 230 may be supplied to processing unit 44, display unit 41, operation unit 42, wireless communication unit 43, and audio output unit 45 via power lines 301, 311, etc.

[0120] (Effects of the third embodiment) The third embodiment described above has the following advantages in addition to the advantages of the first embodiment. Since the communication terminal 40 and the control device 20' are connected by wire and also to the tractor control device 11 at the same time, data can be exchanged between the communication terminal 40, the tractor control device 11, and the control device 20'. This makes it possible for the control device 20' to perform control that takes into account information from the tractor control device 11, for example. Furthermore, since the control device 20' is provided with a power supply unit 25, it is possible to charge the communication terminal 40 (remote control device 200) and ensure power for the communication terminal 40 (remote control device 200).

[0121] As described above, the embodiments of the present invention have been described, but the present invention is not limited to the above-described embodiments and includes various modifications other than those described above. For example, the present invention is not limited to those having all of the configurations provided in the above-described embodiments. Furthermore, it is also possible to delete part of the configuration of a certain embodiment or replace it with another configuration.

[0122] For example, although the above describes an embodiment using a cable conforming to the USB standard, which is a standard for data transmission paths (interface standards), and a communication protocol conforming to the CAN standard, other standards can also be applied. That is, the communication protocol used by the control devices 20 and 20' is applied to the cable connected to the communication terminal 40, and the cable connected to the communication terminal 40 is a cable conforming to the same standard for data transmission paths both during charging and communication.

[0123] 1 and 3 may include the power supply unit 25 described in Fig. 9. In this case, when a wired connection is made as shown in Fig. 3, power is supplied from the control device 20 to the communication terminal 40.

[0124] Furthermore, although the battery section 252 described in FIG. 7 uses a secondary battery, it is also possible to use a capacitor instead of the secondary battery.

[0125] 8, power from the power supply unit 10 is explained as being supplied to the communication terminal 40, but it may also be supplied to the control device 20 in addition to the communication terminal 40. In this case, power lines for this purpose are provided in the cables 104, 105, and 107.

[0126] Furthermore, for each cable described above, the necessary communication lines and power lines have been described, but each cable may be configured to include either a communication line or a power line to make it easier to apply a general-purpose cable (for example, a USB standard cable).

[0127] This specification also includes the disclosure of the following aspects. (Aspect 1) A farming system comprising: a work machine having a working unit attached to a tractor to perform agricultural work; a control device provided in the work machine; and a communication terminal that can be arranged on the tractor; The communication between the communication terminal and the control device can be wireless, and the communication between the communication terminal and the control device can also be wired, the communication terminal includes a rechargeable battery unit, a connector, and a driver; the connector is connectable to a cable used for charging the battery unit and also to a cable used for the wired connection, The communication protocol used in the wired connection is the communication protocol used in the control device, the driver is a driver for receiving a communication protocol used by the control device, An agricultural work machine characterized in that the cable connected to the communication terminal during charging and the cable connected to the communication terminal during wired connection use cables of the same standard for data transmission paths.

[0128] (Aspect 2) In the agricultural implement according to aspect 1, The agricultural machine is characterized in that the data transmission path standard is the USB (Universal Serial Bus) standard, and the communication protocol used in the control device is CAN (Controller Area Network).

[0129] (Aspect 3) In the agricultural work machine according to aspect 1 or aspect 2, When the agricultural work machine is connected via a wired connection, the cable connected to the communication terminal branches off and can be connected to a first power supply unit provided in the tractor, thereby enabling the battery unit to be charged using the first power supply unit as a power source.

[0130] (Aspect 4) In the agricultural work machine according to any one of aspects 1 to 3, When the agricultural machine is connected via a wired connection, another cable is connected between the cable connected to the communication terminal and the control device, and the other cable branches off to be connected to a tractor control device that can output information about the tractor.

[0131] (Aspect 5) In the agricultural work machine according to any one of aspects 1 to 4, the control device includes a second power supply unit; The agricultural machine is characterized in that, during the wired connection, the battery unit can be charged using the second power supply unit as a power source.

[0132] (Aspect 6) In the agricultural work machine according to any one of aspects 1 to 5, the communication terminal includes an operation unit, The agricultural work machine is characterized in that, when a specific operation is performed on the operation unit during the wired connection, the wireless communication is canceled and communication via the wired connection is started. [Explanation of symbols]

[0133] 1 Tractor 2 Work equipment 10 Power supply section 11 Tractor control device 20, 20' control device 21 Control section 23 Radio Communication Department 25 Power supply section 40 Communication terminal 41 Display section 42 Operation section 43 Radio Communication Department 44 Processing section 46 Remote control battery 50 Plowing machine 60 Central Work Section 61 Extension work section 62 Opening and closing cylinder 63 Control Box 101, 102, 103, 104, 105, 105', 106, 107, 107', 108 Cables 101a, 102a, 103a, 104a, 105a, 106a, 107a, 108a First connection portion 101b, 102b, 103b, 104b, 105b, 107b, 108b Second connection part 104c, 105c, 108c Third connection part 200 Remote Control Device 201 Switch 202 Display section 220 Waterproof Cover 230 USB connector 240 CAN driver 251 Charging Management Department 252 Battery section 301, 311 power line 302, 312, 322 signal lines

Claims

1. A farming system comprising: a work machine having a working unit attached to a tractor to perform agricultural work; a control device provided in the work machine; and a communication terminal that can be arranged on the tractor; The communication between the communication terminal and the control device can be wireless, and the communication between the communication terminal and the control device can also be wired, the communication terminal includes a rechargeable battery unit, a connector, and a driver; the connector is connectable to a cable used for charging the battery unit and also to a cable used for the wired connection, The communication protocol used in the wired connection is the communication protocol used in the control device, the driver is a driver for receiving a communication protocol used by the control device, An agricultural work machine characterized in that the cable connected to the communication terminal during charging and the cable connected to the communication terminal during wired connection use cables of the same standard for data transmission paths.

2. The agricultural work machine according to claim 1, The agricultural machine is characterized in that the standard of the data transmission path is the USB (Universal Serial Bus) standard, and the communication protocol used in the control device is CAN (Controller Area Network).

3. The agricultural work machine according to claim 1 or 2, When the agricultural work machine is connected via a wired connection, the cable connected to the communication terminal can be branched and connected to a first power supply unit provided in the tractor, thereby enabling the battery unit to be charged using the first power supply unit as a power source.

4. The agricultural work machine according to claim 1 or 2, When the agricultural machine is connected via a wired connection, another cable is connected between the cable connected to the communication terminal and the control device, and the other cable branches off to be connected to a tractor control device that can output information about the tractor.

5. The agricultural work machine according to claim 1 or 2, the control device includes a second power supply unit; When the wired connection is established, the second power supply unit can be used as a power source to charge the battery unit.

6. The agricultural work machine according to claim 1 or 2, the communication terminal includes an operation unit, The agricultural work machine is characterized in that, when a specific operation is performed on the operation unit during the wired connection, the wireless communication is canceled and communication via the wired connection is started.

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