Display device, display specification change request collection system, and change request acceptance method

Abstract

To obtain a display device capable of accepting a change request with respect to a display specification.SOLUTION: A display device 12 mounted on a train includes a display unit 121 capable of displaying a normal mode screen for displaying information about operation of the train and a maintenance mode screen which includes display contents of the normal mode screen and is in a state capable of accepting a change request with respect to a display specification of the normal mode screen, a change request accepting unit 122 for accepting the change request from a person requesting the change who is desiring the change request, and a control unit 123 which performs the control for displaying the normal mode screen or the maintenance mode screen on the display unit 121 and performs the control for transmitting the change request accepted by the changer request accepting unit 122 to a change request management server for collecting change requests as a destination.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a display device used in a train, a display specification change request collection system, and a change request reception method.

Background Art

[0002] Conventionally, display devices mounted on trains display various information such as the operating status of the train, the stations where it stops, and the stations it passes through. Patent Document 1 discloses a technique for an operation support device that provides support for an operator's operation work on a portable terminal, a train cab, etc.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Generally, in display devices used in trains and the like, various change requests for display specifications, such as visibility and the arrangement of display items, are raised by operators and the like as they are actually put into operation. Conventionally, such change requests are often made by operators and the like to the person in charge of the display device manufacturer after the duty, but there is a problem that it takes time to collect change requests, such as transmission omissions for some change requests and similar change requests being communicated later. In addition, busy operators and the like wish to make changes to the display specifications of the display device every time they are on duty, but sometimes forget to make change requests to the person in charge of the display device manufacturer after the duty.

[0005] The present disclosure has been made in view of the above, and an object thereof is to obtain a display device capable of receiving change requests for display specifications.

Means for Solving the Problems

[0006] To solve the aforementioned problems and achieve the objectives, this disclosure provides a display device to be installed on a train. The display device includes a normal mode screen that displays information about the operation of the train, and the content of the normal mode screen. The contents of the normal mode screen are displayed simultaneously. The system is characterized by comprising: a display unit capable of displaying a maintenance mode screen that is in a state where it can accept change requests for the display specifications of the normal mode screen; a change request reception unit that receives change requests from change requesters, who are persons who wish to make change requests; and a control unit that controls the display unit to display the normal mode screen or the maintenance mode screen, and controls the transmission of change requests received by the change request reception unit to a change request management server that collects change requests. [Effects of the Invention]

[0007] According to this disclosure, the display device has the effect of being able to accept requests for changes to the display specifications. [Brief explanation of the drawing]

[0008] [Figure 1] This figure shows an example of the configuration of the display specification change request collection system according to Embodiment 1. [Figure 2] Block diagram showing an example configuration of the display device according to Embodiment 1 [Figure 3] This figure shows examples of the normal mode screen and maintenance mode screen displayed on the display unit of the display device according to Embodiment 1. [Figure 4] Flowchart showing the operation of the display device according to Embodiment 1 [Figure 5] This figure shows an example of the configuration of the processing circuit when the processing circuit of the display device according to Embodiment 1 is implemented using a processor and memory. [Figure 6] This figure shows an example of the configuration of the processing circuit when the processing circuit of the display device according to Embodiment 1 is configured with dedicated hardware. [Figure 7] Block diagram showing an example configuration of the change request management server according to Embodiment 2. [Figure 8]Flowchart showing the operation of the change request management server according to Embodiment 2 [Figure 9] Flowchart showing the operation of the ground system according to Embodiment 3 [Figure 10] Flowchart showing the operation of the display device according to Embodiment 3 [Modes for carrying out the invention]

[0009] The display device, display specification change request collection system, and change request acceptance method according to embodiments of this disclosure will be described in detail below with reference to the drawings.

[0010] Embodiment 1. Figure 1 shows an example of the configuration of the display specification change request collection system 1 according to Embodiment 1. The display specification change request collection system 1 comprises a display device 12 provided by a train integrated management device 11 mounted on a train 10, a ground system 20, and a change request management server 30. The train integrated management device 11 comprises a display device 12, a CCU (Central Control Unit) 13, and CNs (Communication Nodes) 14a and 14b. The ground system 20 comprises a ground management server 21 and a communication device 22.

[0011] The train integrated management device 11 is installed on the train 10 and acquires information such as operating status from onboard equipment (not shown) installed on the train 10, transmits operational information such as the location information of the train 10 to the ground system 20, and controls the operation of the train 10 based on control information from the ground system 20. The train integrated management device 11 is, for example, a TCMS (Train Control and Monitoring System).

[0012] In the train integrated management device 11, the display device 12 is a device installed on the driver's cab of the train 10 or the like. The display device 12 is, for example, a VDU (Video Display Unit). In the present embodiment, the display device 12 receives a change request for the content displayed on the display screen of the display device 12, that is, the display specification, from an operator of the train 10 or the like, and transmits the received change request to the change request management server 30 via CN14a or CN14b, and the ground system 20. In the example of FIG. 1, the number of display devices 12, that is, the display devices 12 mounted on the train 10 is two, but it is not limited thereto, and it may be one or three or more. The detailed configuration and operation of the display device 12 will be described later.

[0013] The CCU 13 collects information such as the operating state of on-vehicle equipment (not shown) mounted on the train 10 and controls the operation of the train 10. Further, the CCU 13 controls the operation of the train 10 based on control information from the ground system 20. The CCU 13 is, for example, a central device.

[0014] CN14a and 14b are communication relay devices mounted on each vehicle of the train 10 and perform transmission of information such as the operating state of the above-described on-vehicle equipment between the vehicles. Further, CN14a and 14b can perform two-way communication with the ground system 20. At least one of CN14a and 14b transmits a change request for the display specification collected by the display device 12 to the ground system 20 on the ground side as will be described later. In the following description, when CN14a and 14b are not distinguished, they may be simply referred to as CN14. In the present embodiment, it is assumed that the CN14s of the train integrated management device 11 are connected by a network using Ethernet (registered trademark), but the network connecting the CN14s is not limited to Ethernet.

[0015] The ground system 20 receives a change request transmitted from the train 10 on which the display device 12 is mounted, and transmits the change request to the change request management server 30.

[0016] In the ground system 20, the ground management server 21 controls the operation of the train 10 based on the operation information of the train 10 acquired from the train integrated management device 11 mounted on the train 10 via the communication device 22. The ground management server 21 generates control information for the train integrated management device 11 of the train 10 and performs control to transmit the generated control information to the train integrated management device 11 of the train 10 via the communication device 22. Further, the ground management server 21 performs control to transmit a change request for the display specification of the display device 12 acquired from the display device 12 of the train integrated management device 11 via the communication device 22 to the change request management server 30.

[0017] The communication device 22 receives operation information of the train 10 and the like from the train integrated management device 11 and outputs it to the ground management server 21. The communication device 22 transmits the control information for the train integrated management device 11 of the train 10 generated by the ground management server 21 to the train 10. Further, the communication device 22 transmits a change request for the display specification of the display device 12 received from the train integrated management device 11 of the train 10 to the change request management server 30 under the control of the ground management server 21. Note that, regarding the change request for the display specification of the display device 12 received from the train integrated management device 11 of the train 10, since the destination is the change request management server 30, it may be transmitted to the change request management server 30 without being controlled by the ground management server 21. Note that, regarding the communication between the communication device 22 of the ground system 20 and the change request management server 30, although wireless communication is assumed in the example of FIG. 1, wired communication may also be used.

[0018] The change request management server 30 collects change requests for the display specifications of the normal mode screen that displays information about the operation of train 10, which is transmitted from the display device 12 of the train integrated management device 11 installed on train 10. Specifically, the change request management server 30 receives change requests for the display specifications of the display device 12 via the ground system 20. The change request management server 30 stores the change requests for the display specifications of the display device 12. The change request management server 30 is a server installed by the manufacturer of the display device 12. Alternatively, the change request management server 30 may be installed on the cloud and accessible from the manufacturer of the display device 12.

[0019] Thus, the display specification change request collection system 1 is a system in which the display device 12 receives change requests from the driver of the train 10 or the like regarding the content displayed on the display screen of the display device 12, i.e., the display specifications, and sends them to the change request management server 30, and the change request management server 30 collects the change requests.

[0020] Next, the detailed configuration and operation of the display device 12 will be described. Figure 2 is a block diagram showing an example configuration of the display device 12 according to Embodiment 1. The display device 12 comprises a display unit 121, a change request receiving unit 122, a control unit 123, a storage unit 124, and a communication unit 125.

[0021] The display unit 121 can display a normal mode screen that displays information about the operation of train 10, and a maintenance mode screen that includes the display content of the normal mode screen and is in a state where it can accept requests to change the display specifications of the normal mode screen. The normal mode screen is the screen that is displayed on the display unit 121 of the display device 12 when train 10 is in operation. The maintenance mode screen is the screen that is displayed on the display unit 121 of the display device 12 when it is possible to accept change requests from a person who wishes to change the display specifications of the normal mode screen.

[0022] The change request receiving unit 122 receives change requests from change requesters, who are people who wish to request changes to the display specifications of the normal mode screen. Change requesters are envisioned to be, for example, the driver of train 10, or maintenance personnel who perform inspections and maintenance on train 10. Change requesters may also include designers and testers from the manufacturer of the display device 12.

[0023] The control unit 123 controls the display unit 121 to display either the normal mode screen or the maintenance mode screen. The control unit 123 also controls the transmission of change requests received by the change request reception unit 122 to the change request management server 30, which collects change requests.

[0024] The memory unit 124 stores change requests and other information received from the change request recipient in the change request reception unit 122. The memory unit 124 also stores unchangeable information, which is information about items that cannot be changed in the display specifications of the normal mode screen, for each change request recipient's identification information, which will be described later.

[0025] The communication unit 125, under the control of the control unit 123, transmits the change request received by the change request receiving unit 122 from the change request requester to the change request management server 30.

[0026] The normal mode screen and the maintenance mode screen displayed on the display unit 121 of the display device 12 will be described below. Figure 3 is a diagram showing examples of the normal mode screen and the maintenance mode screen displayed on the display unit 121 of the display device 12 according to Embodiment 1. In Figure 3, Figure 3(a) shows the normal mode screen, and Figure 3(b) shows the maintenance mode screen. The normal mode screen in Figure 3(a) and the maintenance mode screen in Figure 3(b) are assumed to be screens that show the operating status of the onboard equipment, Brake, APS (Auxiliary Power Supply System), and Door, which are installed in each car of the train 10, where the train 10 is a 6-car train. In the normal mode screen in Figure 3(a), the "buttons" at the bottom accept operations from the driver of the train 10, and the corresponding operations may differ for each "button".

[0027] Here, while the display unit 121 is displaying the normal mode screen, the display device 12 can switch the display content of the display unit 121 to the maintenance mode screen by having the driver of the train 10 or the like perform a first screen switching operation, such as long-pressing a specific part of the normal mode screen shown in Figure 3(a), or simultaneously pressing multiple specific parts of the normal mode screen shown in Figure 3(a). As a first screen switching operation, the display device 12 may also switch the display content of the display unit 121 from the normal mode screen to the maintenance mode screen when the driver of the train 10 or the like presses a display screen switching button installed in the driver's cab (not shown). The second screen switching operation that the display device 12 receives from the driver of the train 10 or the like to return the display content of the display unit 121 from the maintenance mode screen to the normal mode screen may be the same as the first screen switching operation, or it may be a simpler operation than the first screen switching operation. The reason for making the first screen switching operation equivalent to or more complex than the second screen switching operation is to prevent the display content of the display unit 121 from easily switching from the normal mode screen to the maintenance mode screen, which reduces the original normal mode screen content, due to unintended operation. The control unit 123 may return the display content of the display unit 121 to the normal mode screen if the change request reception unit 122 does not receive a change request for a specified period while the display unit 121 is displaying the maintenance mode screen.

[0028] The maintenance mode screen shown in Figure 3(b) displays the same information as the normal mode screen, along with a keypad for receiving changes from the train driver of train 10 and other personnel, and a comment field for displaying the change requests received from the train driver of train 10 and other personnel. In the example of the maintenance mode screen in Figure 3(b), it is assumed that the display unit 121 and the change request reception unit 122 are implemented via a touch panel. This allows the train driver of train 10 to immediately input change requests from the maintenance mode screen to the display specifications of the normal mode screen before or after operating train 10. The change request reception unit 122 may accept change requests by voice input from the train driver or maintenance personnel of train 10, or by voice input in addition to touch operation on the touch panel. When the change request reception unit 122 accepts a change request by touch operation on the touch panel, the change request is accepted when the item displayed on the display unit 121 is selected by the person making the change request. The change request reception unit 122 can also accept change requests by voice from the person making the change request. However, the method for receiving change requests from change requesters in the change request receiving unit 122 is not limited to these.

[0029] The comment section at the bottom of the maintenance mode screen in Figure 3(b) may display not only the change request just received from the change requester, but also change requests received in the past from the same change requester or other change requesters. That is, when the control unit 123 displays the maintenance mode screen on the display unit 121, it may also display change requests received in the past in the comment section. This allows a change requester to cancel their change request if the content they intended to request has already been requested by another change requester, or if they have forgotten that they have already requested the same change and are about to make the same request. As a result, the display device 12 can reduce the number of duplicate change requests it receives. In addition to change requests stored in the storage unit 124 of the display device 12, the display device 12 may also include change requests obtained from the change request management server 30 by acquiring change history information stored in the change request management server 30. Furthermore, the control unit 123 may acquire progress information for change requests from the change request management server 30 and display the progress information for change requests in the comment section. This allows the change requester to check the status of the display device 12 manufacturer's efforts regarding the change request made by themselves or other change requesters. As a result, the display device 12 can reduce inquiries from the change requester about the progress.

[0030] Here, the control unit 123 of the display device 12 requests identification information of the person making the change request, such as the driver of train 10, before the person making the change request performs a screen switching operation to request a change to the display specifications of the normal mode screen. The identification information of the person making the change request is, for example, a staff ID (IDentifier) ​​assigned to the driver or maintenance worker of train 10, and is information that can identify the attributes of the person making the change request, such as information that can identify whether the person making the change request is a driver or maintenance worker. That is, after obtaining the identification information of the person making the change request, the control unit 123 controls the display unit 121 to display the maintenance mode screen. As a result, the control unit 123 can set items that cannot be accepted from the person making the change request in the change request reception unit 122 based on the identification information of the person making the change request received from the person making the change request and the information that cannot be changed stored in the storage unit 124. The control unit 123 may receive the identification information of the person making the change request via the change request reception unit 122, that is, by touch operation or voice input. Furthermore, the control unit 123 may receive the identification information of the person requesting the change by inputting the identification information from an input means installed in the driver's cab (not shown) of the train 10, or by having the person requesting the change read code information such as a barcode attached to their employee ID card, etc., using a reading means installed in the driver's cab (not shown) of the train 10.

[0031] For example, suppose a change requester wants to reduce the display size of each displayed item so that they can see more information on one screen. If the change requester is the driver of train 10, the display size of the items needs to be of a certain size so that the driver of train 10 can reliably check the contents of the normal mode screen while driving. Also, if there is too much information displayed on the normal mode screen, the driver may overlook some of the displayed items. Therefore, in the case where the change requester is the driver of train 10, a minimum value should be set for the reduction in the display size of the items that can be reduced. On the other hand, if the change requester is a maintenance worker, it is likely that the maintenance worker will only check the contents of the normal mode screen when train 10 is stopped. In this case, the maintenance worker does not need to check the contents of the normal mode screen as quickly as the driver, so it is considered acceptable to reduce the display size of the items to some extent, taking into account the effort of switching between displayed items. Therefore, in the case where the change requester is a maintenance worker, it is not necessary to set a minimum value for the reduction in the display size of the items that can be reduced.

[0032] Furthermore, the display content of the normal mode screen, which is used by maintenance personnel but not by the driver, may be set as non-changeable information for the driver and stored in the memory unit 124. In addition, to prevent frequent changes to the same display specifications, display specifications that have been changed a specified number of times within a specified period may be temporarily designated as non-changeable information.

[0033] The control unit 123 receives a change request from the person making the change request in the change request reception unit 122. When the registration button displayed in the upper right of Figure 3(b) is pressed, the control unit 123 stores the change request in the storage unit 124 and controls the transmission of the change request from the communication unit 125 to the change request management server 30. The change request reaches the change request management server 30 via the communication unit 125, CN14 of the display device 12, and the ground system 20.

[0034] Figure 4 is a flowchart illustrating the operation of the display device 12 according to Embodiment 1. In the display device 12, the control unit 123 receives identification information from the person requesting the change (step S101) and accepts a screen switching operation from the normal mode screen to the maintenance mode screen (step S102). The control unit 123 refers to the non-changeable information corresponding to the attributes of the person requesting the change stored in the storage unit 124 and displays the maintenance mode screen on the display unit 121, that is, switches the display content of the display unit 121 from the normal mode screen to the maintenance mode screen (step S103). The change request receiving unit 122 receives a change request from the person requesting the change (step S104). The control unit 123 displays the change request received by the change request receiving unit 122 on the maintenance mode screen of the display unit 121 (step S105). When the registration button is pressed, the control unit 123 stores the change request in the storage unit 124 (step S106) and sends the change request from the communication unit 125 to the change request management server 30 (step S107). The control unit 123 accepts a screen switching operation from the maintenance mode screen to the normal mode screen from the change requester (step S108). The control unit 123 displays the normal mode screen on the display unit 121, that is, switches the display content of the display unit 121 from the maintenance mode screen to the normal mode screen (step S109).

[0035] Next, the hardware configuration of the display device 12 according to Embodiment 1 will be described. In the display device 12, the display unit 121 is a display such as an LCD (Liquid Crystal Display). The change request receiving unit 122 is an input device such as a touchpad. The display unit 121 and the change request receiving unit 122 may be implemented by a touch panel. The storage unit 124 is a memory. The communication unit 125 is a communication device that can communicate with CN14. The control unit 123 is implemented by a processing circuit. The processing circuit may be a memory for storing programs and a processor for executing programs stored in memory, or it may be dedicated hardware. The processing circuit is also called a control circuit.

[0036] Figure 5 shows an example of the configuration of a processing circuit 90 when the processing circuit of the display device 12 according to Embodiment 1 is implemented with a processor 91 and a memory 92. The processing circuit 90 shown in Figure 5 is a control circuit and comprises a processor 91 and a memory 92. When the processing circuit 90 is composed of a processor 91 and a memory 92, each function of the processing circuit 90 is implemented by software, firmware, or a combination of software and firmware. The software or firmware is written as a program and stored in the memory 92. In the processing circuit 90, each function is implemented by the processor 91 reading and executing the program stored in the memory 92. In other words, the processing circuit 90 includes a memory 92 for storing a program that will ultimately be executed as a result of the processing of the display device 12. This program can also be said to be a program that causes the display device 12 to execute each function implemented by the processing circuit 90. This program may be provided by a storage medium on which the program is stored, or by other means such as a communication medium.

[0037] The above program can also be described as a program that causes a display device 12, which has a display unit 121 capable of displaying a normal mode screen that displays information about the operation of train 10, and a maintenance mode screen that includes the display content of the normal mode screen and is in a state where it can accept change requests for the display specifications of the normal mode screen, to execute the following steps: first step: control the display unit 123 to switch the display content of the display unit 121 from the normal mode screen to the maintenance mode screen; second step: control the change request receiving unit 122 to receive a change request from a person requesting a change; and third step: control the control unit 123 to send the change request received by the change request receiving unit 122 to a change request management server 30 that collects change requests.

[0038] Here, the processor 91 is, for example, a CPU (Central Processing Unit), processing unit, arithmetic unit, microprocessor, microcomputer, or DSP (Digital Signal Processor). The memory 92 is, for example, a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (Registered Trademark) (Electrically EPROM), magnetic disks, flexible disks, optical disks, compact disks, minidiscs, or DVDs (Digital Versatile Discs).

[0039] Figure 6 shows an example of the configuration of the processing circuit 93 when the processing circuit of the display device 12 according to Embodiment 1 is configured with dedicated hardware. The processing circuit 93 shown in Figure 6 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. The processing circuit 93 may be partially implemented with dedicated hardware and partially implemented with software or firmware. In this way, the processing circuit 93 can realize each of the above functions with dedicated hardware, software, firmware, or a combination thereof.

[0040] As described above, according to this embodiment, the display device 12 can receive change requests for the display specifications of the normal mode screen displayed on the display unit 121 from the train driver or maintenance personnel of the train 10 while it is installed on the train 10. The display device 12 also sends the received change requests to a change request management server 30 installed by or accessible from the manufacturer of the display device 12. This allows the display device 12 to easily receive change requests from the train driver or maintenance personnel of the train 10. Furthermore, by using the display device 12 and the change request management server 30, the manufacturer of the display device 12 can extract change requests from the railway company operating the train 10 in real time and efficiently collect change requests for the display specifications. Designers of the manufacturer of the display device 12 can respond quickly to change requests stored in the change request management server 30. In addition, designers of the manufacturer of the display device 12 can use the change request management server 30 to easily view similar change requests collected in the past and the responses to those change requests.

[0041] Embodiment 2. Embodiment 2 describes the operation of the change request management server 30 that receives a change request from the display device 12 via the ground system 20.

[0042] In Embodiment 2, the configurations of the display specification change request collection system 1 and the display device 12 are the same as those in Figures 1 and 2 of Embodiment 1, respectively. In Embodiment 2, the change request management server 30 creates an estimate based on the collected change requests and estimate creation information that specifies the man-hours required for the changes for each change item. The detailed configuration and operation of the change request management server 30 will now be described. Figure 7 is a block diagram showing an example configuration of the change request management server 30 according to Embodiment 2. The change request management server 30 comprises a communication unit 31, a storage unit 32, and a control unit 33. Figure 8 is a flowchart showing the operation of the change request management server 30 according to Embodiment 2.

[0043] The communication unit 31 receives the change request transmitted from the display device 12 of the train integrated management device 11 mounted on the train 10 via the ground system 20 (step S201). The communication unit 31 stores the received change request in the storage unit 32 (step S202).

[0044] The storage unit 32 stores the change requests received by the communication unit 31. The storage unit 32 also stores estimate creation information that specifies the man-hours required for each change item. The estimate creation information is information created in advance by the designer of the display device 12 or the like. The estimate creation information is created by the designer of the display device 12 or the like, anticipating the changes that may be requested, but if a change request is received that is not specified in the estimate creation information, i.e., not anticipated, the designer of the display device 12 or the like can later add or modify the information.

[0045] The control unit 33 creates an estimate for the change requests stored in the storage unit 32 based on the estimate creation information stored in the storage unit 32 (step S203). The control unit 33 creates the estimate by specifying, for example, the man-hours required for the change items requested in the change request, the number of changes requested in the change request, etc. The control unit 33 may present the created estimate to the designer of the display device 12, or it may store it in the storage unit 32. Alternatively, the control unit 33 may send the created estimate via the communication unit 31 to the ground management server 21 of the ground system 20 installed at the railway company operating the train 10.

[0046] Next, the hardware configuration of the change request management server 30 according to Embodiment 2 will be described. In the change request management server 30, the communication unit 31 is a communication device capable of communicating with the ground system 20. The storage unit 32 is memory. The control unit 33 is implemented by a processing circuit. The processing circuit may be a memory for storing programs and a processor for executing programs stored in memory, as in the display device 12 of Embodiment 1, or it may be dedicated hardware. The processing circuit is also called a control circuit.

[0047] As described above, according to this embodiment, the change request management server 30, which receives a change request from the display device 12 via the ground system 20, creates an estimate based on estimate creation information that specifies the man-hours required for the changes for each item to be changed. As a result, the designer of the display device 12 and others do not have to spend time creating an estimate, and can therefore respond to change requests efficiently, such as by making design changes.

[0048] Embodiment 3. Embodiment 3 describes a case in which the ground management server 21 of the ground system 20 transmits a change request sent from a display device 12 mounted on a certain train 10 to the change request management server 30, and also transmits it to a display device 12 mounted on another train 10.

[0049] In Embodiment 3, the configurations of the display specification change request collection system 1 and the display device 12 are the same as those shown in Figures 1 and 2 of Embodiment 1, respectively. Also, in Embodiment 3, the ground system 20 is the same as the configuration shown in Figure 1 of Embodiment 1. In the example in Figure 1, one train 10 whose operation is controlled by the ground system 20 is shown, but generally, a ground system 20 that controls the operation of a train 10 can communicate wirelessly with multiple trains 10 and control the operation of multiple trains 10 communicating wirelessly. The ground system 20 acquires operation information of each train 10 and acquires change requests received by each train 10. The ground system 20 transmits the change requests transmitted from the trains 10 to other display devices 12 installed on other trains 10. In the ground system 20, the ground management server 21 may send a change request acquired from a certain train 10 to another train 10 other than the train 10 in question, or it may broadcast the change request to all trains 10 along with information that the source of the change request is a certain train 10.

[0050] In the former example, the control unit 123 of the display device 12 of train 10 only needs to store the acquired change request information in the storage unit 124. In the latter example, if the source information of the acquired change request is another train 10 other than the train 10 on which it is installed, the control unit 123 only needs to store the acquired change request information in the storage unit 124. In the latter example, if the source information of the acquired change request is the train 10 on which it is installed, the control unit 123 does not store the acquired change request information in the storage unit 124 because the same change request has already been stored in the storage unit 124. As a result, the control unit 123 can acquire change requests received by other display devices 12 installed on other trains 10, and when displaying the maintenance mode screen on the display unit 121, it can also display change requests received by other display devices 12. Other operations of the display device 12 are the same as in the first embodiment.

[0051] Figure 9 is a flowchart showing the operation of the ground system 20 according to Embodiment 3. In the ground system 20, the communication device 22 receives a change request from a certain train 10 (step S301). The ground management server 21 has the communication device 22 transmit the change request obtained from the certain train 10 to another train 10 other than the certain train 10 (step S302).

[0052] Figure 10 is a flowchart showing the operation of the display device 12 according to Embodiment 3. In the flowchart shown in Figure 10, the operations from step S101 to step S104 are the same as the operations from step S101 to step S104 in the flowchart of Embodiment 1 shown in Figure 4. If the control unit 123 has received a change request from another train 10 (step S111: Yes), it displays the change requests received by the change request reception unit 122, including the change requests received from other trains 10, on the maintenance mode screen of the display unit 121 (step S112). If the control unit 123 has not received a change request from another train 10 (step S111: No), it displays the change requests received by the change request reception unit 122 on the maintenance mode screen of the display unit 121 (step S105). In the flowchart shown in Figure 10, the operations from step S106 to step S109 are the same as the operations from step S106 to step S109 in the flowchart of Embodiment 1 shown in Figure 4.

[0053] Next, the hardware configuration of the ground system 20 according to Embodiment 3 will be described. In the ground system 20, the communication device 22 is a communication device that can communicate with the train 10 and the change request management server 30. The ground management server 21 is implemented by a processing circuit. The processing circuit may be a memory for storing programs and a processor for executing the programs stored in the memory, or it may be dedicated hardware. The processing circuit is also called a control circuit.

[0054] As described above, according to this embodiment, the display device 12 also displays change requests received by the display devices 12 of other trains 10. This allows the driver or maintenance personnel of train 10 to see change requests already made by other drivers or maintenance personnel by checking the display device 12, thereby avoiding making similar change requests. The manufacturer of the display device 12 can reduce duplicate change requests.

[0055] The configurations shown in the above embodiments are merely examples, and it is possible to combine them with other known technologies, combine different embodiments, and omit or modify parts of the configuration without departing from the gist of the invention. [Explanation of Symbols]

[0056] 1 Display specification change request collection system, 10 Train, 11 Train integrated management device, 12 Display device, 13 CCU, 14a, 14b CN, 20 Ground system, 21 Ground management server, 22 Communication device, 30 Change request management server, 31, 125 Communication unit, 32, 124 Storage unit, 33, 123 Control unit, 121 Display unit, 122 Change request reception unit.

Claims

1. A display device installed on a train, A display unit capable of displaying a normal mode screen that displays information about the operation of the aforementioned train, and a maintenance mode screen that includes the display contents of the normal mode screen, and in a state where the display contents of the normal mode screen are displayed simultaneously and a request to change the display specifications of the normal mode screen can be received. A change request receiving unit that receives the change request from a person who desires the change request, The control unit controls the display unit to display the normal mode screen or the maintenance mode screen, and controls the change request received by the change request reception unit to send the change request to the change request management server that collects the change requests. A display device characterized by having the following features.

2. The control unit, after obtaining the identification information of the person requesting the change, performs control to display the maintenance mode screen on the display unit. The display device according to feature 1.

3. A storage unit that stores information on items that cannot be changed in the display specifications, for each identification information of the person requesting the change, Equipped with, The control unit sets items that cannot be accepted by the change requester for each change requester in the change request acceptance unit, based on the identification information and non-changeable information of the change requester. The display device according to feature 2.

4. When the control unit displays the maintenance mode screen on the display unit, it also displays the change requests that have been received in the past. The display device according to any one of features 1 to 3.

5. The control unit obtains the change request received by another display device installed on another train, and when displaying the maintenance mode screen on the display unit, it further displays the change request received by the other display device. The display device according to any one of features 1 to 4.

6. The control unit obtains progress information for the change request from the change request management server and further displays the progress information for the change request. The display device according to feature 4 or 5.

7. The change request receiving unit accepts the change request when the item displayed on the display unit is selected by the person making the change request. The display device according to any one of features 1 to 6.

8. The change request receiving unit receives the change request by voice of the person making the change. The display device according to any one of features 1 to 7.

9. A display device according to any one of claims 1 to 8, A change request management server collects change requests for the display specifications of the normal mode screen that displays information about train operations received by the display device, which are transmitted from the display device. A display specification change request collection system characterized by comprising the following features.

10. The aforementioned change request management server creates an estimate based on the estimate creation information that specifies the man-hours required for the changes for each change item, in response to the collected change requests. The display specification change request collection system according to feature 9.

11. A ground system that receives the change request transmitted from a train equipped with the display device and transmits the change request to the change request management server. Equipped with, The ground system transmits the change request transmitted from the train to another display device installed on another train. The display specification change request collection system according to claim 9 or 10.

12. A method for receiving requests to change display devices installed on trains, The aforementioned display device A display unit capable of displaying a normal mode screen that displays information about the operation of the aforementioned train, and a maintenance mode screen that includes the display contents of the normal mode screen, and in a state where the display contents of the normal mode screen are displayed simultaneously and a request to change the display specifications of the normal mode screen can be received. Equipped with, The first step is for the control unit to perform control to switch the display content of the display unit from the normal mode screen to the maintenance mode screen, The second step is for the change request receiving unit to receive the change request from the person requesting the change, who is the person who desires the change request. A third step in which the control unit controls the transmission of the change request received by the change request receiving unit to a change request management server that collects the change requests, A method for receiving change requests, characterized by including the following:

13. In the first step described above, the control unit, after obtaining the identification information of the person requesting the change, performs control to display the maintenance mode screen on the display unit. The method for receiving change requests according to feature 12.

14. The aforementioned display device A storage unit that stores information on items that cannot be changed in the display specifications, for each identification information of the person requesting the change, Equipped with, In the first step, the control unit sets items that cannot be accepted by the change requester in the change request acceptance unit, based on the identification information and non-changeable information of the change requester. The method for receiving change requests according to feature 13.

15. In the first step, when the control unit displays the maintenance mode screen on the display unit, it further displays the change requests that have been received in the past. A method for receiving change requests according to any one of claims 12 to 14.

16. In the first step described above, the control unit obtains the change request received by another display device installed on another train, and when displaying the maintenance mode screen on the display unit, further displays the change request received by the other display device. A method for receiving change requests according to any one of claims 12 to 15.

17. In the first step described above, the control unit obtains progress information for the change request from the change request management server and further displays the progress information for the change request. The method for receiving change requests according to claim 15 or 16.

18. In the second step described above, the change request receiving unit accepts the change request when the item displayed on the display unit is selected by the person making the change request. The method for receiving a change request according to any one of claims 12 to 17.

19. In the second step described above, the change request receiving unit receives the change request by voice of the person making the change request. A method for receiving change requests according to any one of claims 12 to 18.

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