JP7321129B2 - Train information display system - Google Patents

Description

The present invention relates to a train guidance display system.

On platforms of railway stations, etc., display devices (such as "departure signs") are installed to guide passengers by displaying the types, destinations, departure times, etc. of trains departing from or passing through the relevant platform. Also called; hereinafter referred to as "guidance indicator") is provided. The guide display receives notification of information (guide display information) for train guide display from a device (management device) that manages the display (train guide display), and updates the train guide display at any time.

As a technique for displaying train guidance on such a guide display, there is known a technique in which communication with a passenger guidance device corresponding to a management device is performed by wireless communication (see, for example, Patent Document 1). ).

Japanese Unexamined Patent Application Publication No. 2001-71909

In the conventional train guidance display using a guidance display, the management device transmits guidance display information to the guidance display at the time of predetermined guidance display updating, and the guidance display is performed based on the guidance display information received by the guidance display. is updated. When the guidance display is updated is when the train departs from the home for which guidance is to be provided, or when the train passes the home. Therefore, for example, even if the guidance display information was normally transmitted and received when the guidance display was updated last time, the new guidance display information could not be transmitted and received due to an abnormality in communication when the guidance display was updated next time. If it could not be performed normally, it could have happened that the guidance display was in a state where it should be updated, but the display remained based on the previous guidance display information, or the guidance display suddenly disappeared. . In that case, it would not be possible to display guidance information with appropriate information to passengers at an appropriate timing, which could have been a problem.

An object of the present invention is to develop a technique that enables train guidance displays with appropriate contents to be updated at appropriate timings within the possible range even when an abnormality occurs in the communication of guidance display information for train guidance displays. to provide.

A first invention for solving the above problems is
Based on given guidance display information, a guidance display device that displays information about the train at a display position determined in the order of departure or passing of the train, and manages the train guidance display on the guidance display device. A train guidance display system communicably connected to a management device for
The management device
a display information communication processing unit that performs display information communication processing for transmitting the guidance display information to the guidance display device each time a predetermined guidance display is updated;
a monitoring information transmission control unit that controls transmission of monitoring information to the guidance display device in a first period;
an error detection unit that detects a communication error related to the display information communication process;
a cycle changing unit configured to change a transmission cycle of the monitoring information transmission control unit to a second cycle shorter than the first cycle when a communication error is detected by the error detection unit;
with
The guidance display device
a guide display control unit that updates and controls train guide displays based on the guide display information when the guide display information is received from the management device;
When the cycle of the monitoring information received from the management device changes from the first cycle to the second cycle, the display position of the train information being displayed is advanced and displayed, and the last display position is displayed. A shift display control unit that performs display control for erasing the information of
It is a train guidance display system equipped with

According to the first invention, the management device performs display information communication processing for transmitting guidance display information for the guidance display device to display train guidance every time the guidance display is updated. On the other hand, apart from the transmission of the guidance display information, the monitoring information is repeatedly transmitted toward the guidance display device at the first cycle. Then, when a communication error is detected in the display information communication process that is performed each time the guidance display is updated, the transmission cycle of the monitoring information is changed to a shorter second cycle. According to this, in the guidance display device, when the cycle of the received monitoring information changes from the first cycle to the second cycle, the display information communication processing in the management device (guidance display to the guidance display device when updating the guidance display) is performed. It can be detected that a communication error has occurred during the process of transmitting display information. In addition, since the timing at which the period of the monitoring information changes is the timing at which it is time to update the guidance display, the timing at which the occurrence of the communication error is detected is also the timing for updating the train guidance display. Therefore, the train guide display can be updated by moving up the display position of the train information being displayed and controlling the shift display for erasing the information at the last display position. Therefore, even if a communication error occurs and the guide display device cannot receive the guide display information, it is possible to update the train guide display with appropriate contents at appropriate timing.

Moreover, as a second invention,
The cycle changing unit changes the transmission cycle from the second cycle when the communication error is detected by the error detection unit when the transmission cycle of the monitoring information transmission control unit is the second cycle. change to a shorter third period,
The shift display control unit erases the train information being displayed when the cycle of the monitoring information received from the management device changes to the third cycle.
The train guidance display system of the first invention may be constructed.

According to the second invention, when a communication error is detected during the second period, the management device changes the transmission period of the monitoring information from the second period to a third period, which is a shorter period. can be done. Since the timing of detecting a communication error is when the guide display is updated, changing to the third cycle means that the guide display update time has arrived two times in succession. In the guidance display device, when the period of the received monitoring information changes from the second period to the third period, the information of the train being displayed is erased because it is time to update the guidance display twice consecutively. By doing so, it is possible to prevent the guidance from being displayed with incorrect contents.

Moreover, as a third invention,
The display information communication processing unit controls transmission of predetermined essential guide display information among the guide display information in advance,
The guidance display control unit, when receiving only the mandatory guidance display information, performs control to update the train guidance display based on the mandatory guidance display information.
The train guidance display system of the first or second invention may be constructed.

According to the third invention, the management device can first transmit the predetermined essential guidance display information among the items of the train guidance display. Then, in the guide display device, when only the essential guide display information is received, the train guide display can be continued by updating to the train guide display based on the essential guide display information.

Moreover, as a fourth invention,
The guide display device includes a completion notification control unit that performs control to transmit a reception completion notification to the management device when the guide display information is received,
The error detection unit determines the communication error based on whether or not the reception completion notification is received.
The train guidance display system of any one of the first to third inventions may be constructed.

According to the fourth invention, the communication error can be detected by the guidance display device notifying the reception completion in response to the reception of the guidance display information from the management device.

Moreover, as a fifth invention,
The first cycle includes a first short cycle and a first long cycle that are longer than the second cycle and have different lengths of the cycle,
The management device
When the transmission cycle of the monitoring information transmission control unit is other than the first cycle and when the communication related to the display information communication process is successful, the transmission cycle of the monitoring information transmission control unit is changed to the first cycle. a cycle recovery changing unit that changes to a short cycle of 1;
While the transmission cycle of the monitoring information transmission control unit is the first cycle, the transmission cycle of the monitoring information transmission control unit is set to the first cycle according to the communication status between the management device and the guidance display device. A first cycle switching control unit that switches between the short cycle and the first long cycle of
comprising
The train guidance display system of any one of the first to fourth inventions may be constructed.

According to the fifth aspect, when a communication error is detected and the cycle of the monitoring information is the second cycle or the third cycle, and the communication error is resolved, the transmission cycle of the monitoring information is changed to the first cycle. While changing the short period of the periods to the first short period, while the transmission period is the first period, the first short period is changed according to the communication status between the management device and the guide display device. and the first long period can be switched at any time.

Also, as a sixth invention,
The management device comprises an approach notification transmission control unit that performs control to transmit a predetermined train approach notification to the guide display device when a predetermined train approach signal is externally input,
When receiving the train approaching notification, the guidance display device controls display based on the train approaching notification in place of the train guidance display for the later train being displayed, and displays the preceding train without receiving the train approaching notification. An approach notification display control unit that controls a predetermined display to the effect that a train is approaching instead of the train guide display of the late train being displayed when a predetermined approach estimation timing based on the departure time or passage time has come. comprising
The train guidance display system of any one of the first to fifth inventions may be constructed.

According to the sixth aspect of the present invention, when the guidance display device receives a train approaching notice from the management device, it can display that the train is approaching instead of the train guidance display of the late train being displayed. can. Even if the train approaching notification is not received, when it is time to estimate the approach based on the departure time or passage time of the preceding train, a display indicating that the train is approaching is displayed instead of the train guidance display for the later train being displayed. be able to. Therefore, it is possible to display that the train is approaching even under communication conditions in which the guide display device cannot receive the train approach notification.

The figure which shows the whole structural example of a train guidance display system. The figure which shows the example of a train guide display on a guide indicator. FIG. 2 is a block diagram showing a functional configuration example of a management device; FIG. 4 is a diagram showing a data configuration example of monitoring status data; The figure which shows the data structural example of the status data at the time of an update. The block diagram which shows the functional structural example of a guide display apparatus. The figure which shows the data structural example of train guidance display data. 4 is a flow chart showing the flow of processing for transmitting guide display information and train approaching notification; 4 is a flowchart showing the flow of processing for sending monitoring information; 4 is a flowchart showing the flow of processing for setting the transmission cycle of monitoring information; 4 is a flow chart showing the flow of processing for updating the train guide display. The figure which shows the other example of a display in a guidance indicator. The figure which shows the other example of a display in a guidance indicator. The figure which shows the other example of a display in a guidance indicator. The figure which shows the other example of a display in a guidance indicator. FIG. 11 is a diagram showing an example of transition of train guidance display in modification 3; FIG. 11 is a diagram for explaining train guidance display in Modification 5; FIG. 11 is a diagram for explaining train guidance display in Modification 6;

Preferred embodiments of the present invention will be described below with reference to the drawings. In addition, the present invention is not limited by the embodiments described below, and the forms to which the present invention can be applied are not limited to the following embodiments.

[overall structure]
FIG. 1 is a diagram showing an example of the overall configuration of a train guidance display system 1 according to this embodiment. This train guidance display system 1 is for providing train guidance using a guidance display 40 (see FIG. 6, etc.) arranged in the space above each numbered track of the platform at the station where the train guidance display system 1 is installed. A device 10 and a plurality of guide display devices 30 having guide displays 40 are communicably connected. The guide display 40 is implemented using an electronic bulletin board, a liquid crystal monitor, or the like.

The guidance display device 30 displays train guidance regarding departure or passage of a train on a platform to be guided. Specifically, the guidance display device 30 displays the train guidance display information received from the management device 10 on the guidance display device 40 to display the train guidance.

In the present embodiment, one or more guidance display devices 30 are provided for each numbered track of the platform of the installed station (each numbered track for each numbered track from 1st to Nth in FIG. 1) for displaying train guidance with each corresponding numbered track as a guide target numbered track. be done. For example, the guide display devices 30 belonging to the same group surrounded by a dashed line for each numbered line are arranged at appropriate positions in the upper space of the numbered line. In addition, although not shown, a guide display device is also provided separately, which is arranged in the upper space of the ticket gate, the upper space of the passage leading from the ticket gate to the corresponding number line, or the like. The guidance display device 30 displays information on the corresponding train as a train guidance display at display positions determined in the order of trains departing from or passing through the guidance target track number.

FIG. 2 is a diagram showing an example of train guidance display on the guidance display 40. As shown in FIG. In this embodiment, the case where the train guide display for two trains, the preceding train and the later train, is displayed will be exemplified. In FIG. 2, the upper part is the display position for displaying the information of the preceding train, and the lower part is the display position for displaying the information of the later train. That is, the train guide display of the present embodiment is configured such that the train guide display for the preceding train and the train guide display for the later train are displayed in two stages, upper and lower. The train guide display for each train is composed of, for example, displays of four items: "type", "destination", "departure time", and "number of cars". Therefore, in the present embodiment, the guide display information transmitted by the management device 10 to each guide display device 30 is the guide display information for two trains, the first train and the latter train, related to the guide target number track of the guide display device 30. , each guidance display information stores the type data of the corresponding train, the destination data, the departure/passage time data, and the number of cars data. In the departure/passage time data, the departure time is set if the train stops at the installation station, and the passage time is set if the train passes through the installation station. In addition, the destination data of trains passing through the installation station is set to "pass", and from the contents of this destination data, it is possible to determine whether the train stops at the installation station or the train is passing through. can be done. It should be noted that the items of the train guide display are not limited to the four items shown in the example, and the data configuration of the guide display information may be changed as appropriate according to the display items. For example, the data may be included to display guidance information such as train names, stations, connecting trains, boarding areas, and the like. Alternatively, for example, train names can be added to the display items to include that data. In this embodiment, the type and destination will be described as essential display items.

The management device 10 transmits to each guidance display device 30, as needed, train guidance information relating to a platform to be guided by the guidance display device 30, and manages the train guidance display on each guidance display device 30. FIG. In this embodiment, the train guide display is managed by transmitting the guide display information of the leading train and the late train related to the guide target track number to each guide display device 30 . More specifically, as shown in FIG. 1, the management device 10 of the present embodiment is communicably connected to an external operation management system 3, receives necessary external inputs from the operation management system 3, and controls the train. Manage guidance displays.

The operation management system 3 manages various information related to train operations, such as train operation schedule information, operation schedule change information, train location information, delay information, and suspension information. In this embodiment, the operation management system 3 monitors whether a train (leading train related to the numbered track) has departed or passed the numbered track for each numbered track of a station to be managed. Specifically, based on managed train location information, it may be possible to determine whether a train departs from or passes through the relevant track number. It is also possible to input a detection signal and, based on the input of the detection signal, determine departure or passage from the track number. In either case, it is determined that the timing for updating the guidance display has come. Then, when it is determined that it is time to update the guide display, the guide display information of the preceding train and the late train related to the corresponding track number is generated based on the operation schedule information and the like. After that, an update instruction signal for instructing updating of the train guide display for the track number is sent to the management device 10 together with the generated guide display information.

Further, in this embodiment, the operation management system 3 monitors the approach of trains to each numbered track of a station to be managed. Specifically, based on the managed train location information, it is possible to determine which train is approaching the station and which track the train is entering. It is also possible to determine the approach of a train based on the input of the detection signal. In either case, when a train is approaching, a train approach signal for the corresponding track number is notified to the corresponding management device 10 .

At the station where the train guidance display system 1 is installed, the guidance display devices 30 for the same guidance target track display the same train guidance display. Therefore, when guidance display information is notified together with an update instruction signal from the operation management system 3, the management device 10 receives each guidance display device belonging to the group of the numbered track related to the update instruction signal (the numbered track is designated as the guidance target numbered track). The guidance display information is transmitted to each guidance display device 30. In addition, when a train approach signal is notified from the operation management system 3, the management device 10 transmits a train approach notification to each guide display device 30 of the group of track numbers related to the train approach signal.

In this embodiment, communication between the management device 10 and each guide display device 30 is realized by multi-hop wireless communication between the guide display devices 30 in the same group. For this purpose, the management device 10 is equipped with a radio master device, and each guidance display device 30 is equipped with a radio slave device.

Then, in communication, a wireless communication network including the parent device of the management device 10 and the slave devices of the guidance display devices 30 of the group of the number for which the update has been instructed is constructed. 30, guidance display information, train approach notification, monitoring information described later, and the like are transmitted in a relay format. Also, at that time, the management device 10 sets the optimum communication route and communication channel based on the communication status with each guidance display device 30 . The communication status is the presence or absence of a communication error, the reception level of each guidance display device 30 (slave device), the reception level of the management device 10 (master device), and the like. In this embodiment, using the communication status related to the transmission of monitoring information, the optimum communication route and communication channel are set as needed at the start of work or during operation. Thereby, stable communication between the management device 10 and each guidance display device 30 is achieved. It should be noted that a repeater may be installed at an appropriate place in the station premises separately from the child device of each guide display device 30, and a wireless communication network may be constructed including the repeater. In addition, communication routes and the like may be set using not only the communication status related to transmission of monitoring information, but also the communication status related to transmission of guide display information and train approach notification.

As for the communication procedure, for example, in the case of transmitting guidance display information to the first group in FIG. 1, the management device 10 first transmits the information to be transmitted to the guidance display device 30-1. In response to this, the guidance display device 30-1 transfers the information to be transmitted to the guidance display device 30-2 one communication route later. This is repeated, and the information to be transmitted is transmitted to the final guidance display device 30-4 on the right end in FIG. On the other hand, when the guidance display device 30-4 receives the information to be transmitted, it generates a reception completion notification including its own device ID, reception time, reception level, etc. It is transmitted to the guidance display device 30-3. In response to this, the guidance display device 30-3 similarly generates a reception completion notification further including its own device ID, reception level, etc., and transmits it to the guidance display device 30-2. This is repeated, and a reception completion notification including the reception level of each of the guidance display devices 30-1 to 30-4 is transmitted to the management device 10. FIG.

[Function configuration]
1. Management Device FIG. 3 is a block diagram showing an example of the functional configuration of the management device 10. As shown in FIG. As shown in FIG. 3, the management device 10 is a type of computer device that includes a management-side wireless device 11, an operation unit 13, a display unit 14, a communication unit 15, a control unit 17, and a storage unit 19. is.

The management-side wireless device 11 is a master device of wireless devices for executing multi-hop wireless communication with each guidance display device 30 and the like.

The operation unit 13 is an input device having, for example, a touch panel, various switches, a keyboard, a mouse, etc., and outputs an operation signal according to an operation input to the control unit 17 . The display unit 14 is realized by, for example, a liquid crystal display device or the like, and performs display according to a display signal from the control unit 17 .

The communication unit 15 is a wired or wireless communication device realized by, for example, a wireless communication module, a router, a modem, a TA, a jack of a wired communication cable, a control circuit, or the like, and communicates with an external device such as the operation management system 3. perform communication between

The control unit 17 includes an arithmetic device or circuit such as a CPU (Central Processing Unit) or an FPGA (Field Programmable Gate Array). Based on the received data and the like, instructions and data are transferred to each unit constituting the management device 10, and the operation of the management device 10 is controlled in a comprehensive manner. The control unit 17 includes a communication execution control unit 171, a display information communication processing unit 172, an error detection unit 173, an approach notification transmission control unit 174, a monitoring information transmission control unit 175, a cycle change unit 176, a cycle It includes a recovery change unit 177 and a first cycle switching control unit 178 . The functional units of the control unit 17 may be processing blocks realized as software by executing a program, or circuit blocks realized by hardware circuits such as ASIC and FPGA. good. In this embodiment, processing blocks implemented as software by the control unit 17 executing the management program 191 will be described.

The communication execution control unit 171 controls execution of multi-hop wireless communication with each guidance display device 30 via the management-side wireless device 11 . In this embodiment, together with the display information communication processing unit 172, the approach notification transmission control unit 174, and the monitoring information transmission control unit 175, guidance display information, train approach notification, and monitoring information are transmitted for each track group. A reception completion notification from the display device 30 is received.

The communication execution control unit 171 also determines whether or not there is a communication error, which can be said to be a communication result related to the guidance display information (whether or not a reception completion notification has been received, which is detected by the error detection unit 173), and whether or not the reception completion notification has been received. An optimum communication route and communication channel are set according to the reception level from each guidance display device 30 included in the notification. Not only the communication result related to the current guide display information and the reception level of each guide display device 30, but also the communication result and reception level history when the guide display information was sent in the past. may be analyzed to predict the occurrence of a communication error, and a communication route or communication channel may be set. For example, if there is a child device or repeater that shows a downward trend in the reception level at a specific time on a specific day of the week, change the communication channel of the child device, etc., or communicate with the child device, etc. at the relevant date and time. Temporarily change the settings so that they are not included in the route. A change setting of a communication channel or a communication route can be realized using a known technology related to multi-hop wireless communication.

The display information communication processing unit 172 performs display information communication processing for transmitting the guidance display information of each of the leading train and the trailing train on the platform to be guided to the guidance display device 30 every time a predetermined guidance display is updated. In the present embodiment, when an update instruction signal is notified from the operation management system 3, the display information communication processing unit 172 transmits the guidance display information notified together with the update instruction signal to the group of the track number related to the update instruction signal. Control for transmission to each guidance display device 30 is performed as display information communication processing.

More specifically, the display information communication processing unit 172 first sets the type data and the destination data of the guidance display information of the first train and the second train to be transmitted as mandatory guidance display information, and sets the mandatory guidance display information, The remaining guidance display information (departure/passage time data and car number data in this embodiment) is divided. Then, the transmission of the essential guidance display information is controlled first, and the transmission of the remaining guidance display information is controlled after the transmission control.

The error detection unit 173 detects a communication error related to the display information communication process. Specifically, the error detection unit 173 determines a communication error based on whether or not a reception completion notification has been received from the guidance display device 30 . Therefore, the timing at which the error detection unit 173 detects a communication error related to the display information communication process is each time a predetermined guidance display is updated. Further, in the present embodiment, a communication error related to transmission of monitoring information and a communication error related to transmission of train approach notification are also determined based on whether or not the reception completion notification has been received.

The approach notification transmission control unit 174 controls transmission of a predetermined train approach notification to the guidance display device 30 when a predetermined train approach signal is externally input. In this embodiment, when a train approaching signal is notified from the operation management system 3, the approaching notification transmission control unit 174 sends a train approaching notification to each of the guide display devices 30 of the group of tracks related to the train approaching signal. Control to send. Specifically, when the preceding train stops at the installed station, message data to the effect that the train is arriving is included in the train approach notification and transmission is controlled. If the preceding train is a train passing through the installed station, transmission control is performed including message data indicating that the train is passing.

The monitoring information transmission control unit 175 controls transmission of monitoring information to each guide display device 30 at a predetermined transmission cycle determined for each group. Therefore, in this embodiment, the current transmission cycle is managed as the current transmission cycle 195 for each group of each number line, and the initial value thereof is, for example, the first long cycle "cycle A". The first short period may be “period B”. Further, the current transmission cycle 195 is appropriately rewritten for each group of each number line by the cycle changing unit 176, the cycle recovery changing unit 177, and the first cycle switching control unit 178. FIG.

That is, as will be described later in detail, the current transmission cycle 195 of the monitoring information is changed by the cycle changing unit 176 to the second cycle “cycle C” or the third cycle “cycle D”, and the cycle is recovered. The change unit 177 changes the cycle to the first short cycle, “cycle B”. Furthermore, the period A and the period B are switched by the first period switching control section 178 . Both the cycle A (first long cycle) and the cycle B (first short cycle) are longer than the cycle C (second cycle), and the cycle B (first short cycle) is a cycle The period is shorter than A (first long period). Then, the monitoring information transmission control unit 175 uses the transmission cycle for each group of each number line according to the current transmission cycle 195 . That is, in the present embodiment, the monitoring information transmission control unit 175 repeatedly transmits the monitoring information to each guide display device 30 at any one of the transmission periods A, B, C, and D. FIG.

The cycle changing unit 176 changes the transmission cycle of the monitoring information by the monitoring information transmission control unit 175 to the cycle C when the error detection unit 173 detects a communication error related to the display information communication process. Further, when the error detection unit 173 detects a communication error related to the display information communication process when the transmission cycle of the monitoring information transmission control unit 175 is the cycle C, the cycle changing unit 176 changes the monitoring information transmission control unit 175 is changed to the period D. In this embodiment, if the transmission cycle is cycle A or cycle B at the timing of detection of a communication error, the transmission cycle is changed to cycle C. FIG. On the other hand, if the transmission cycle is already the cycle C at the timing of the detection, the update instruction signal is newly sent from the operation management system 3 at the next guide display update after the guide display update that changed to the cycle C. Then, the transmission cycle is changed from cycle C to cycle D.

When the transmission cycle of the monitoring information transmission control unit 175 is the cycle C or the cycle D, and the communication related to the display information communication process is successful (the communication error is not detected by the error detection unit 173), the cycle recovery change unit 177 case), the transmission cycle is changed to cycle B.

While the transmission cycle of the monitoring information transmission control unit 175 is cycle A or cycle B, the first cycle switching control unit 178 changes the transmission cycle according to the communication status between the management device 10 and the guide display device 30. Switch between A and cycle B. In this embodiment, the cycle is switched based on the reception level of the guidance display device 30 when the monitoring information is received. This is because a communication error is likely to occur after a decrease in the communication level, and by shortening the transmission cycle, it is possible to quickly detect the occurrence of the communication error.

Although the specific lengths of the periods A to D are not particularly limited, each of the periods A to D is set to a prime number of seconds so that the guidance display device 30 can identify the periods A to D from the reception intervals of the monitoring information. For example, the periods A, B, C, and D can be set to "7 seconds", "5 seconds", "3 seconds", "2 seconds", etc. in that order. According to this, by transmitting the monitoring information for three cycles, even if the guidance display device 30 fails to receive one of them, the guidance display device 30 will be able to detect any of the cycles A to D of the monitoring information. can be identified.

The storage unit 19 is implemented by a storage medium such as an IC memory, hard disk, or optical disk. The storage unit 19 stores a program for operating the management device 10 and realizing various functions of the management device 10, data used during execution of the program, and the like. In this embodiment, a management program 191, communication setting data 193, current transmission cycle 195, current judgment reception level 197, and communication status data 200 are stored.

The management program 191 controls the control unit 17 as a communication execution control unit 171, a display information communication processing unit 172, an error detection unit 173, an approach notification transmission control unit 174, a monitoring information transmission control unit 175, a cycle change unit 176, and a cycle recovery change unit. 177 , a program for functioning as the first cycle switching control unit 178 .

The communication setting data 193 is prepared for each group of each numbered track of the installed station. Store.

The current transmission cycle 195 is prepared for each group of each track, and stores the current transmission cycle of monitoring information for each guide display device 30 of the group in association with the track number.

The reception level for current determination 197 is prepared for each group of each number line, and stores the reception level used for switching the transmission period by the first period switching control section 178 . In this embodiment, for example, the reception level of the latest monitoring information at each guide display device 30 of the group (set as the notification content data 213 in the monitoring status data 210 related to the transmission of the monitoring information shown in FIG. 4) The lowest reception level among the reception levels for each device ID) is set and updated as needed as the current reception level 197 for determination. Then, the first period switching control section 178 switches the transmission period to the period A when the low level condition described later based on the current judgment reception level 197 is satisfied, and to the period B when the low level condition is not satisfied.

The communication status data 200 is prepared for each group of each track, and stores the communication status related to transmission of guide display information, train approach notification, and monitoring information. Specifically, one piece of communication status data 200 includes a line number 201 , monitoring status data 210 , and updating status data 220 .

The monitoring status data 210 is generated each time monitoring information is transmitted, and stores the communication status related to the transmission of the monitoring information. Specifically, one piece of monitoring status data 210 includes a communication result 211 and notification content data (reception completion notification) 213, as shown in FIG.

The communication result 211 stores the communication result related to the transmission of the monitoring information. In this embodiment, when a reception completion notification is received from each guide display device 30 of the group as a response to the transmission of the monitoring information, "success" is received. When it is determined as an error, it is regarded as a "communication error".

One line of the notification content data 213 corresponds to the reception completion notification from one of the guidance display devices 30 of the group, and when the reception completion notification is received, the notification content is Stored.

The update status data 220 is generated each time the guide display is updated (notification of an update instruction signal). Specifically, one update situation data 220 includes departure/passage data 230 and approach data 240, as shown in FIG.

The departure/passage time data 230 stores the communication status related to the display information communication process performed in response to notification of the update instruction signal. Specifically, the departure/passage time data 230 includes a communication result (“success” or “communication error”) 231 related to the display information communication process, and each guidance display of the group as a response to the transmission of the guidance display information. and notification content data 233 of the reception completion notification received from the device 30 .

The approaching data 240 stores the communication status related to the transmission of the train approaching notification which is performed in response to the notification of the train approaching signal after the notification of the update instruction signal. Specifically, the approaching data 240 includes a communication result (“success” or “communication error”) 241 related to the transmission of the train approaching notification, and each guidance display device of the group as a response to the transmission of the train approaching notification. and notification content data 243 of the reception completion notification received from 30 .

2. Guide Display Device FIG. 6 is a block diagram showing an example of the functional configuration of the guide display device 30. As shown in FIG. As shown in FIG. 6 , the guidance display device 30 includes a display-side wireless device 31 , an operation section 33 , a control section 37 , a storage section 39 and a guidance display 40 .

The display-side wireless device 31 is a slave device of a wireless device for performing multi-hop wireless communication with the management device 10, other guidance display devices 30, and the like.

The operation unit 33 is an input device having, for example, a touch panel, various switches, a keyboard, a mouse, etc., and is used by workers during maintenance.

The control unit 37 includes, for example, an arithmetic device such as a CPU and an arithmetic circuit, and configures the guide display device 30 based on programs and data stored in the storage unit 39, data received from the management device 10, and the like. It transfers instructions and data to each unit to control the operation of the guidance display device 30 in an integrated manner. The control unit 37 includes a monitoring information reception processing unit 371 , a display information reception processing unit 372 , a guidance display control unit 373 , a shift display control unit 374 and an approach notification display control unit 375 . The functional units of the control unit 37 may be processing blocks realized as software by executing a program, or circuit blocks realized by hardware circuits such as ASIC and FPGA. In this embodiment, processing blocks implemented as software by the control unit 37 executing the guide display program 391 will be described.

The monitoring information reception processing unit 371 is a functional unit that performs monitoring information reception processing, and performs reception and transfer of monitoring information via the display-side wireless device 31 and transmission of a reception completion notification in response to reception of the monitoring information. conduct. Specifically, if the guide display device 30 is in the middle of the communication route, control is performed to transfer the received monitoring information to the guide display device 30 one after. On the other hand, when the guidance display device 30 is at the end of the communication route, it generates a reception completion notification including its own device ID, the reception time of the monitoring information, and the reception level at the time of reception, and communicates. Control is performed to transmit to the guide display device 30 or the management device 10 one route ahead. Further, when a reception completion notification is received from another guidance display device 30, control is performed to add the reception completion notification related to the own device to the received reception completion notification and transmit the same to the guidance display device 30 or the like whose communication route is one before. I do.

In addition, the monitoring information reception time processing unit 371 repeats the process of identifying the period of the monitoring information based on the reception interval of the monitoring information, and updates the current monitoring information period 393 as needed. Specifically, the time limit is set to three periods of the longest period A among the four periods A to D which are a combination of prime numbers as described above. Then, the period is identified based on the reception interval of the monitoring information until the time limit elapses.

The display information reception processing unit 372 is a functional unit that performs display information reception processing. Sends a reception completion notification for the reception of As for the reception procedure, first, the preceding reception flag Fr1 and the continuation reception flag Fr2, which are referred to in the train guide display process (see FIG. 11), which will be described later, are initialized to "OFF". Then, when the essential guidance display information previously transmitted from the management device 10 is received, the type data 411 and destination data 412 of the preceding train are set in the preceding train data 410, and the type data 421 and destination of the late train are set. data 422 are set in the late train data 420 to generate the train guide display data 400 (see FIG. 7). At that time, the preceding reception flag Fr1 is set to "ON". Next, when the remaining guidance display information is received from the management device 10, the departure/passage time data 413 and the number of cars data 415 of the preceding train are set in the advance train data 410, and the departure/passage time data 423 of the following train are set. The number of cars data 425 is set in the late train data 420, and the train guidance display data 400 is updated. At that time, the continued reception flag Fr2 is set to "ON". The transfer of the received guidance display information and the transmission of the reception completion notification are performed in the same manner as the transfer of the monitoring information and the transmission of the reception completion notification in the monitoring information reception process.

In addition, the display information reception time processing unit 372 receives and transfers a train approaching notification, and transmits a reception completion notification in response to the reception of the train approaching notification. The transfer of the received train approach notification and the transmission of the reception completion notification are performed in the same way as the transmission of the monitoring information and the transmission of the reception completion notification in the monitoring information reception process.

When guidance display information is received from the management device 10, the guidance display control unit 373 updates and controls the train guidance display of the preceding train and the train guidance display of the following train based on the guidance display information. In the present embodiment, when the essential guide display information previously transmitted from the management device 10 is received, and the remaining guide display information transmitted after that is received, and the guide display information is complete, the update control is performed. conduct.

In addition, in this embodiment, when the guide display control unit 373 receives the essential guide display information but does not receive the rest of the guide display information, it performs update control based on the essential guide display information. Conversely, when the guidance display control unit 373 receives the remaining guidance display information but does not receive the essential guidance display information, it displays the train in the same way as the shift display, which is the train guidance display at the time of a communication error, which will be described later. Update control of guidance display.

When the cycle of the monitoring information received from the management device 10 changes from the first cycle A or B to the second cycle C, the shift display control unit 374 displays the train guidance in the event of a communication error. As a display, it controls the shift display based on the train guidance display being displayed. Further, when the cycle of the monitoring information received from the management device 10 changes from the cycle C to the third cycle D, the shift display control unit 374 controls to erase the train guide display of the preceding train. Since the shift display is already performed at the time when the cycle C is reached and the train guide display for the later train is not performed, when the cycle changes to D, the train guide display for the preceding train is erased. In this embodiment, control is performed to display a message such as "under adjustment" after erasing the train guide display of the preceding train.

The approach notification display control unit 375 controls the train approach display that notifies the approach of the preceding train to the guide target track number. In this embodiment, when a train approaching notification is received by the display information reception processing, the display based on the train approaching notification is controlled instead of the train guidance display of the late train being displayed.

On the other hand, the approach notification display control unit 375 monitors the arrival of the estimated approach timing based on the departure time or passage time of the preceding train in preparation for the case where the train approach notification is not received. For the departure time or passage time, the departure/passage time data that has already been received as the guide display information for the preceding train is used. Then, the approach estimation timing can be, for example, N seconds before the departure time or the passage time. The value of N may be set in advance as a fixed value, or may be set by performing statistical processing based on the reception time of past train approach notifications. For example, each time a train approaching notification is received, the time difference between the reception time and the departure time or passage time is obtained and recorded, and the average value of the recorded time differences is used as the value of N.

Then, when the approaching notification display control unit 375 does not receive the train approaching notification and the approaching estimation timing is N seconds before the departure time or passage time of the preceding train, the train guidance display of the following train being displayed is displayed. Instead, it controls a predetermined indication that a train is approaching. In this embodiment, arrival-time message data indicating that a train is arriving and passing-time message data indicating that a train is passing are prepared in advance. Based on the destination data already received as guidance display information for the preceding train, it is determined whether or not the preceding train will pass through the installed station. , displays a message to the effect that a train is arriving or passing.

The storage unit 39 is implemented by a storage medium such as an IC memory, hard disk, or optical disk. In this storage unit 39, a program for operating the guidance display device 30 and realizing various functions of the guidance display device 30, data used during execution of the program, etc. are stored in advance or processed. is temporarily stored each time. In this embodiment, a guidance display program 391, current monitoring information period 393, and train guidance display data 400 are stored. In addition, it is also possible to appropriately store monitoring information, guide display information, reception history of train approach notifications, reception levels at the time of these receptions, and the like.

The guidance display program 391 is a program for causing the control section 37 to function as the monitoring information reception processing section 371, the display information reception processing section 372, the guidance display control section 373, the shift display control section 374, and the approach notification display control section 375. is.

The current monitoring information cycle 393 stores the current monitoring information cycle identified by the monitoring information reception processing unit 371 as needed.

The train guidance display data 400 stores the data of the train guidance display being displayed on the guidance display device 40 . Specifically, as shown in FIG. 7 , the train guide display data 400 includes leading train data 410 and trailing train data 420 . The preceding train data 410 stores type data 411, destination data 412, departure/passing time data 413, and number of cars data 415 received as guidance display information of the preceding train at the time of updating the guidance display immediately before. The late train data 420 stores type data 421, destination data 422, departure/passing time data 423, and number of cars data 425 received as guidance display information of the late train at the time of guidance display update immediately before. do.

[Process flow]
1. Flow of Processing in Management Apparatus First, the flow of processing in the management apparatus 10 will be described with reference to FIGS. 8 to 10. FIG. In the management device 10, processing for transmitting guide display information and train approach notification (see FIG. 8), processing for transmitting monitoring information (see FIG. 9), and setting of transmission cycle of monitoring information, which will be described below, (see FIG. 10) are performed in parallel. 8 to 10 show the procedure focused on one numbered track at the station where the management device 10 is installed, and actually each process is performed for each numbered track.

1-1. Transmission of Guidance Display Information and Train Approaching Notification FIG. 8 is a flow chart showing the flow of processing for transmitting guidance display information and train approaching notification. In this process, the management device 10 first monitors notification of an update instruction signal related to the track from the operation management system 3 and notification of a train approach signal related to the track.

Then, when it is time to update the guidance display of the relevant track and the operation management system 3 notifies the update instruction signal (step S101: YES), the preceding transmission failure flag Fs1 and the continuation transmission failure flag Fs2 are initialized to "OFF". After that, first, the display information communication processing unit 172 performs control to transmit the essential guidance display information among the guidance display information notified together with the update instruction signal to each guidance display device 30 of the group of the number line. (Step S103).

Subsequently, the error detection unit 173 waits for reception of the reception completion notification from the guide display device 30 . Then, if the reception completion notification is received (step S105: YES), the process proceeds to step S109. On the other hand, if the error detection unit 173 does not receive the reception completion notification after the predetermined time has passed (step S105: NO), it determines that there is a communication error and sets the preceding transmission failure flag Fs1 to "ON" (step S105: NO). S107). After that, the process proceeds to step S109.

In step S109, the display information communication processing unit 172 performs control to transmit the remaining guidance display information to each guidance display device 30 of the group of the number line. Subsequently, the error detection unit 173 waits for reception of the reception completion notification from the guide display device 30 . Then, if the reception completion notification is received (step S111: YES), the process proceeds to step S115. On the other hand, if the error detection unit 173 does not receive the reception completion notification after the predetermined time has passed (step S111: NO), the error detection unit 173 determines that there is a communication error and sets the continued transmission failure flag Fs2 to "ON" (step S111: NO). S113). After that, the process proceeds to step SS115.

In step S115, the display information communication processing unit 172 determines the preceding transmission failure flag Fs1, and if it is "ON" (step S115: YES), performs control to retransmit the essential guidance display information (step S117). For example, the transmission control of the essential guidance display information is repeated a predetermined number of times (one time or two or more times). As a result, if the reception completion notification is received from the guidance display device 30 (step S119: YES), the error detection unit 173 turns the preceding transmission failure flag Fs1 to "OFF" (step S121), and the process proceeds to step S125. . On the other hand, when the error detection unit 173 does not receive the reception completion notification and the communication error is not resolved (step S119: NO), the error detection unit 173 notifies the external device (for example, the operation management system 3, the station device, etc.) of the communication error. and externally output (step S123), and the process proceeds to step S143.

In step S125, the display information communication processing unit 172 determines the continuation transmission failure flag Fs2, and if it is "ON" (step S125: YES), performs control to retransmit the remaining guidance display information (step S127). For example, the transmission control of the remaining guidance display information is repeated a predetermined number of times (one time or two or more times). As a result, if the reception completion notification is received from the guidance display device 30 (step S129: YES), the error detection unit 173 turns the continuation transmission failure flag Fs2 to "OFF" (step S131), and proceeds to step S143. . On the other hand, if the error detection unit 173 does not receive the reception completion notification and the communication error is not resolved (step S129: NO), the process proceeds to step S123, and the communication error is detected by an external device (for example, the operation management system 3 or station device). etc.) and output to the outside, and the process proceeds to step S143.

Next, when a train approaches the numbered track and a train approaching signal is notified from the operation management system 3 (step S133: YES), first, the approach notification transmission control unit 174 controls each guidance display device of the group of the numbered track. 30 is controlled to transmit a train approach notification (step S135). Subsequently, the error detection unit 173 waits for reception of the reception completion notification from the guide display device 30 . Then, if the reception completion notification is received (step S137: YES), the process proceeds to step S143. On the other hand, when the error detection unit 173 does not receive the reception completion notification even after the predetermined time has passed (step S137: NO), the error detection unit 173 performs control to transmit the train approach notification again (step S139). For example, the train approach notification transmission control is repeated a predetermined number of times (one time or two or more times). In this case, the number of retransmissions and the retransmission interval should be larger than the number of retransmissions of the guidance display information performed in steps S117 and S127, and should be shorter than the retransmission interval. As a result, if a reception completion notification is received from the guidance display device 30 (step S141: YES), the process proceeds to step S143. On the other hand, if the error detection unit 173 does not receive the reception completion notification and the communication error is not resolved (step S141: NO), the error detection unit 173 proceeds to step S123 and outputs the communication error to an external device, for example. Then, the process proceeds to step S143.

Then, in step S143, an end determination is made, and until this process ends (step S143: NO), the process returns to step S101 and the above-described processes are repeated.

1-2. Regarding Transmission of Monitoring Information FIG. 9 is a flowchart showing the flow of processing for transmission of monitoring information. In this process, the monitoring information transmission control unit 175, at the transmission timing for each current transmission cycle set as the current transmission cycle 195 for the number line (step S21: YES), each guide display device of the group of the number line 30 is controlled to transmit monitoring information (step S23).

Subsequently, the error detection unit 173 waits for reception of the reception completion notification from the guide display device 30 . If the reception completion notification is not received (step S25: NO), the process proceeds to step S29. On the other hand, if the error detection unit 173 receives the reception completion notification (step S25: YES), it selects the lowest reception level from among the reception levels at the time of reception included in the reception completion notification of each guide display device 30, The current judgment reception level 197 is updated (step S27). After that, the process proceeds to step S29.

Then, in step S29, an end determination is made, and until this process ends (step S29: NO), the process returns to step S21 and the above-described process is repeated.

1-3. Setting of Monitoring Information Transmission Cycle FIG. 10 is a flow chart showing the flow of processing for setting the monitoring information transmission cycle. In this process, first, the period changing unit 176 determines whether or not there is a communication error related to the display information communication process. Specifically, the preceding transmission failure flag Fs1 and the continuation transmission failure flag Fs2 set and updated in the course of the process described with reference to FIG. 8 are both "OFF", and no communication error has been detected. If so (step S301: NO), the process proceeds to step S303.

Then, in step S303, the cycle recovery changing unit 177 determines whether the current transmission cycle 195, which is the current transmission cycle of the monitoring information, is the cycle C or the cycle D. FIG. Then, if the current transmission cycle 195 is the cycle C or the cycle D (step S303: YES), the cycle recovery changing unit 177 changes the current transmission cycle 195 to the cycle B and updates the current transmission cycle 195 (step S305). After that, the process proceeds to step S319.

On the other hand, if the current transmission cycle 195 is the cycle A or the cycle B (step S303: NO), the first cycle switching control unit 178 determines whether or not the reception level of each guidance display device 30 of the group of the number has decreased. judge. For example, the first cycle switching control unit 178 determines the level lowering condition as "that the current reception level for judgment 197 for the numbered track is below a predetermined low reception level", and if the condition is satisfied, the reception level is lowered (step S307: YES). In that case, the first cycle switching control unit 178 switches to cycle B and updates the current transmission cycle 195 (step S309). After that, the process proceeds to step S319. The predetermined low reception level value may be set in advance.

On the other hand, the first cycle switching control unit 178 determines that the reception level is not lowered unless the level lowering condition is satisfied (step S307: NO), switches to the cycle A, and updates the current transmission cycle 195 ( step S311). After that, the process proceeds to step S319. Switching between the period A and the period B is realized by the processing of steps S307 to S311.

Returning to step S301, when at least one of the preceding transmission failure flag Fs1 and the continuation transmission failure flag Fs2 is "ON" and a communication error is detected (step S301: YES), the period changing unit 176 The process proceeds to step S313. Then, in step S313, if the current transmission cycle 195 is cycle A or cycle B (step S313: YES), the cycle changing unit 176 changes it to cycle C and updates the current transmission cycle 195 (step S315). After that, the process proceeds to step S319. Further, if the period has already been changed to period C and the state of period C continues without recovery from the communication error (step S313: NO), the period changing unit 176 changes the period to a new period when the guidance display is updated. When an update instruction signal is sent from the operation management system 3, the cycle is changed to D, and the current transmission cycle 195 is updated (step S317). After that, the process proceeds to step S319.

Then, in step S319, end determination is made, and until this process ends (step S319: YES), the process returns to step S301 and repeats the above-described processes.

2. Flow of Processing in Guidance Display Device Next, a flow of processing for updating the train guidance display in the guidance display device 30 will be described with reference to FIG. 11 . Prior to the processing described here, the monitoring information reception processing unit 371 starts the monitoring information reception processing, and the display information reception processing unit 372 starts the display information reception processing.

In this process, first, the process is branched according to the current monitoring information cycle 393, which is the cycle of monitoring information that is identified at any time during the process of receiving monitoring information. That is, when the current monitoring information cycle 393 is the cycle A or the cycle B (step S401: YES), the guidance display control unit 373 sets and updates the preceding reception flag Fr1 and the continuation reception flag Fr1 which are set and updated at any time during the display information reception process. Determine flag Fr2. Then, if both of them are "ON" and the essential guidance display information and the remaining guidance display information have been received (step S403: YES), the train of the preceding train is selected based on the received guidance display information. The guidance display and the train guidance display of the late train are updated and controlled (step S405). After that, the process proceeds to step S441.

Specifically, the train guidance display of the preceding train on the guidance display device 40 is updated based on the guidance display information of the preceding train among the received guidance display information, and the guidance display is performed based on the guidance display information of the later train. Control is performed to update the train guidance display of the late train in the device 40 (see FIG. 2).

Next, when the preceding reception flag Fr1 is "ON" and the continuation reception flag Fr2 is "OFF", that is, when only the essential guidance display information has been received (step S407: YES), the guidance display control unit 373 Update control based on the essential guidance display information is performed (step S409). After that, the process proceeds to step S441.

Specifically, as the train guidance display, the display related to the type and the display related to the destination on the guidance display 40 are updated and controlled based on the essential guidance display information about the preceding train. The display related to the departure time and the display related to the number of cars are left blank and not displayed. FIG. 12 shows an example of the display on the guidance indicator 40 in this case. FIG. 12 shows a display example when only the essential guide display information is received at the time of updating the guide display next to the update of the guide display related to the train guide display of FIG. According to this, even under a situation where the communication state has deteriorated, if the essential guidance display information of the preceding train and the following train can be received, the train guidance can be performed by displaying the type and destination, which are the mandatory display items. It is possible to continue the display. In this case, when the rest of the guide display information is received after that, the process of step S405 in FIG. 11 updates the train guide display to include the remaining departure time and the number of cars.

Also, in the case of the timing at which the train approaching notification is received by the display information reception processing (step S415: YES), the approaching notification display control unit 375 follows the message data of the train approaching notification and displays the train information for the later train being displayed. In place of the display, it controls the display of a message to the effect that the train will arrive or pass (step S417). After that, the process proceeds to step S441. If it is not the timing of receiving the train approach notification (step S415: NO), the process proceeds to step S425.

Specifically, when a train approaching notification is received by the display information reception processing, the approaching notification display control unit 375 controls the display based on the train approaching notification instead of the train guidance display of the late train being displayed. do. In this embodiment, a message indicating that a train is arriving or passing is displayed according to the message data of the train approach notification. FIG. 13 shows an example of the display on the guidance indicator 40 in this case. FIG. 13 shows a display example when a train approach notification of the preceding train in the upper row is received after updating the guidance display related to the train guidance display of FIG. 2 . When controlling the display of the message, the announcement of the arrival or passing of the train is also made.

Return to FIG. Next, when the current monitoring information cycle 393 is the cycle C (step S419: YES), it is the timing when the current monitoring information cycle 393 changes from the cycle A or the cycle B to the cycle C (step S421: YES), and step S409 (step S422: YES), the shift display control unit 374 selects the shift display based on the currently displayed train guide display as the train guide display at the time of the communication error. The display is controlled (step S423). After that, the process proceeds to step S441.

Specifically, the control of the shift display is the control of advancing the display position of the train information (train guide display) being displayed and erasing the train information (train guide display) at the last display position. as In this embodiment, since the train information display for two trains is performed, the train information display for the late train is displayed as the train information display for the preceding train at the display position of the preceding train, and the train information display for the late train being displayed is deleted. to control the shift display. FIG. 14 shows an example of the display on the guidance indicator 40 in this case. In FIG. 14, when a communication error occurs at the next update of the guidance display related to the train guidance display of FIG. 4 shows an example of display when display information is not received). By controlling the shift display here, as shown in FIG. 14, the train information display for the later train in the display shown in FIG. blank. According to this, even under communication conditions in which a communication error occurs and the guide display device 30 cannot receive the guide display information, train guide display can be continued.

Returning to step 421 in FIG. 11 , if the state of cycle C continues instead of the timing of changing from cycle A or cycle B to cycle C (step S421: NO), the approach notification display control unit 375 It is determined whether or not the estimated timing has come. If the approach estimation timing has not come (step S425: NO), the process proceeds to step S441.

Then, when it is time to estimate the approach (step S425: YES), and when the preceding train passes the installed station (step S427: YES), according to the passage message data prepared in advance, the late train being displayed is displayed. In place of the train guide display, the display of the message when passing is controlled (step S429). On the other hand, if the train does not pass and stops (step S427: YES), the display of the arrival message is controlled instead of the train information display of the late train being displayed according to the arrival message data prepared in advance (step S431). ). After that, the process proceeds to step S441. For example, when the preceding train passes, the same display as in FIG. 13 can be realized by preparing arrival message data having the same content as the example in FIG. In this case as well, an announcement to the effect that the train concerned will arrive or pass will be made at the same time.

Next, when the current monitoring information cycle 393 is cycle D (step S433: YES), the shift display control unit 374 performs control to erase the train guidance display of the preceding train (step S435). After that, the process proceeds to step S441. FIG. 15 shows an example of the display on the guidance indicator 40 in this case. FIG. 15 shows a display example in the case where the communication error does not recover even when the guidance display is updated next time the guidance display related to the train guidance display in FIG. 14 is updated, and the cycle of the monitoring information becomes cycle D. there is In that case, as shown in FIG. 15, the train guide display of the preceding train being displayed disappears, and, for example, a message such as "under adjustment" is displayed.

Return to FIG. If the current monitoring information period 393 is not the period D and the period of the monitoring information cannot be identified as one of the periods A to D and the timeout occurs after the above-mentioned time limit has passed (step S437: YES), the shift The display control unit 374 erases the train guide display that is being displayed, and performs control such as changing the background color to red for example (step S439). For example, as in FIG. 15, "under adjustment" is displayed and the background color is changed to red. According to this, it is possible to realize a display that can be distinguished from the case of step S435 in which the monitoring information can be received. After that, the process proceeds to step S441. If the timeout has not occurred (step S437: NO), the process proceeds to step S441.

Then, in step S441, end determination is made, and until this process ends (step S441: YES), the process returns to step S401 and the above-described processes are repeated.

As described above, according to the present embodiment, the management device 10 transmits monitoring information to the guidance display device 30 at predetermined transmission intervals, separately from guidance display information for the guidance display device 30 to display train guidance. Send repeatedly.

The transmission cycle is updated at any time by the management device 10 as one of the cycles A to D, and the guidance display device 30 identifies at any time which of the cycles A to D is the cycle from the reception interval of the monitoring information. Then, the transmission cycle is changed from cycle A or cycle B to cycle C when a communication error related to the display information communication process is detected at the time of updating the guide display. Therefore, even if the guidance display information cannot be received due to deterioration of the communication situation, the guidance display device 30 can change the monitoring information from the cycle A or B to the cycle C when the monitor information is received and the cycle can be identified. The changed timing can be detected as the update of the guidance display.

If the communication error continues unresolved, the transmission cycle will change from cycle C to cycle D after waiting for the next update of the guide display corresponding to the cycle C. Be changed. Therefore, the guide display device 30 can detect the timing when the transmission cycle changes from C to D as the timing of the next update of the guide display.

Then, in the guidance display device 30, when the period A or B is changed to the period C, the train guidance display of the late train being displayed is changed to the train guidance display of the new leading train, and the train guidance display of the late train being displayed is changed. By erasing the train guide display, the shift display can be controlled and the train guide display can be updated. Also, when the period changes to D, control is performed to erase the train guide display of the preceding train. In this embodiment, after erasing the train guide display of the preceding train, a message such as "under adjustment" can be displayed.

Therefore, according to the present embodiment, even if a communication error occurs and the guidance display device cannot receive the guidance display information, the train guidance display with appropriate contents is updated at an appropriate timing to the extent possible. It becomes possible to

It should be noted that the form to which the present invention can be applied is not limited to the above-described embodiment, and the addition, omission, or change of constituent elements can be applied as appropriate.

[Modification 1]
For example, in the above-described embodiment, a configuration is exemplified in which guidance display information is notified from the operation management system 3 to the management device 10 together with an update instruction signal when the guidance display is updated. On the other hand, the management device 10 may manage information on the departure or passage of trains for each track number at the station where the management device 10 is installed. Then, in response to notification of the update instruction signal from the operation management system 3, the management device 10 may generate guidance display information for the corresponding numbered track and transmit it to each guidance display device 30 of the group of the numbered track. In addition, the management device also manages various information related to train operation such as train operation schedule information and track location information, monitors trains approaching each numbered track of the installed station, and monitors departure or passage of trains from each numbered track. 10 may be performed. Then, the management device 10 may determine the update timing of the train guide display for each track, determine the timing of the train approach notification, and notify the guide display device 30 of the timing.

[Modification 2]
Also, in communication between the management device 10 and the guide display device 30, the amount of data that can be transmitted at one time may be limited. In this case, when the volume of information to be transmitted exceeds the limited capacity, the information to be transmitted may be divided for each limited capacity and transmitted. In that case, when transmitting guidance display information, it is possible to reduce the amount of communication data by converting predetermined items (platform, type, destination, number of cars, etc.) into codes. For example, the destination data is converted into a destination code indicating the corresponding destination.

[Modification 3]
Further, in the above embodiment, the train guide display for two trains, the preceding train and the late train, is illustrated, but the present invention can also be applied to the case of displaying the train guide display for three or more trains. In that case, the number of types of transmission cycles may be increased according to the number of trains for which train guidance display is to be performed, and transmission control of monitoring information may be performed. Specifically, in the above-described embodiment in which the train guidance display for two trains is performed, the transmission cycle of the monitoring information is changed to the cycle C or the cycle D when a communication error is detected. If so, the type of transmission cycle is increased by one. More specifically, the transmission cycle is configured to be changeable to a cycle E, which is a shorter cycle than the cycle D. Also in this case, it is preferable to use different prime seconds so that each of the periods A to E can be identified.

Then, the period changing unit 176 in the management device 10 changes the transmission period of the monitoring information to the period C when a communication error is detected. Further, the cycle changing unit 176 changes the transmission cycle to cycle D if a communication error is detected when the transmission cycle is cycle C, and changes the transmission cycle to cycle E if a communication error is detected during cycle D. change to

On the other hand, the shift display control unit 374 in the guidance display device 30 receives a change in the cycle of the monitoring information received from the management device 10 and controls the shift display of the train guidance display in the guidance display device 40 . FIG. 16 is a diagram showing a transition example of train guide display in this modified example. FIG. 16 shows an example of train guidance display for three trains. That is, in the guide display 40 of this modification, the display positions of the preceding train, the next train, and the next train are determined in order from the top, and these train guide displays are displayed in three stages. . In addition, in FIG. 16, illustration of the contents of the train guide display is omitted, and the contents are simplified.

For example, the shift display control unit 374 changes the cycle of the monitoring information from the cycle A or the cycle B to the cycle C during the display of the train guidance display 41 of the leading train Ta, the next train Tb, and the next train Tc shown in FIG. When it changes to , the shift display is controlled as a train guide display at the time of communication error, the display position of the train guide display of the train being displayed is advanced and displayed, and the train guide display of the train at the last display position is erased. . As a result, the train guide display 41 being displayed is changed to the train guide display 42, the train guide display of the next train Tb in the train guide display 41 is shifted to the upper stage, and the train guide display of the next train Tc is displayed. The train information display shifts to the upper stage and becomes the train information display for the next train, and the train information display for the next train is blank. When the period changes from the period C to the period D, the shift display is similarly controlled. As a result, the train guide display 42 being displayed is changed to the train guide display 43, the train guide display of the next train Tc in the train guide display 42 is shifted to the upper stage, and the train guide display of the next train is displayed. The guidance display and the train guidance display for trains departing one after another are blank. Also, when the period changes from period D to period E, the train guidance display of the preceding train is erased, and the display 44 of a message such as "under adjustment" is controlled.

Although an example of increasing the number of types of transmission cycles has been shown here, the number of types may be left unchanged. Then, as in the above embodiment, the train guidance display being displayed may be deleted when the cycle of the monitoring information changes from the cycle C to the cycle D. FIG. That is, the shift display control unit 374 controls the display 44 of "under adjustment" when the cycle C changes to the cycle D during the display of the train guide display 42 of the preceding train Tb and the next train Tc. good too.

[Modification 4]
Further, in the above embodiment, an example is shown in which the first period is composed of two types of period A (first long period) and period B (first short period). may be configured. Both may be set to a period longer than the period C which is the second period.

[Modification 5]
Further, in the above-described embodiment, the case where the guide display information for two trains, the preceding train and the later train, is divided into two pieces of the essential guide display information and the remaining guide display information, and the transmission is controlled is exemplified. On the other hand, a configuration may be adopted in which the guide display information of the preceding train (hereinafter referred to as "leading train information") and the guide display information of the following train (hereinafter referred to as "late train information") are individually and sequentially transmitted. . At that time, the preceding train information is divided into data related to the essential display items (essential guidance display information related to the preceding train) and data related to the remaining display items (remaining guidance display information related to the preceding train), and sequentially Likewise, the late train information is divided into data related to mandatory display items (essential guidance display information related to late trains) and data related to remaining display items (remaining guidance display information related to late trains). It is also possible to perform control for sequential transmission. In other words, in the case of displaying a train guide for two trains, the data may be divided into four and the transmission control may be performed. The same is true when displaying three or more train guides as in the third modification.

In this modification, the guidance display control unit 373 in the guidance display device 30 controls the train guidance display for each train (for example, when displaying the train guidance for two trains, for each of the preceding train and the following train). do. FIG. 17 is a diagram for explaining the train guidance display in this modified example. The left side of FIG. A display example is shown. As in FIG. 16, the contents of the train guidance display on the guidance indicator 40 are omitted and shown in a simplified manner.

In this modified example, (1) for trains that have received both the essential guide display information and the remaining guide display information, train guide display (normal display illustrated in FIG. 2) based on the guide display information is performed. (2) For trains for which only the mandatory guidance display information has been received, the train guidance display is performed based on the received mandatory guidance display information. For example, as in the train information display for the late train shown in FIG. 17, the type and destination, which are essential display items, are displayed, but the departure time and number of cars are left blank without being displayed. (3) Train guidance is not displayed for trains for which the remaining guidance display information has been received but the essential guidance display information has not been received. That is, like the train guide display for the preceding train shown in FIG. 17, all the display items are left blank without being displayed.

[Modification 6]
Further, in the above-described embodiment and the like, the type and destination of the items of the train guide display are described as essential display items, but which items are essential display items are not particularly limited. Further, the configuration is not limited to dividing the items of the train guide display into two groups and setting one of them as an essential display item.

For example, as shown in FIG. 18, if the display items are composed of seven items 1 to 7, and these are divided into three groups, and the priorities of "high", "medium" and "low" are set for each group, do. In that case, the display information communication processing unit 172 in the management device 10 first controls the transmission of each data item 1 and the item 2 having a priority of "high" as essential guide display information, and controls the transmission. After that, control the transmission of each data of item 3 to item 5 with "medium" priority, and after the transmission control, control the transmission of each data of item 6 and item 7 with "low" priority. .

On the other hand, in the guidance display device 30, the guidance display control unit 373 receives the mandatory guidance display information with the priority of "high" when it does not receive any of the three groups and the data is not complete. The train guidance display is controlled depending on whether or not That is, if only the essential guidance display information with a priority of "high" is received, items 1 and 2 are displayed, and if each data with a priority of "medium" is also received, Items 1 to 5 are displayed. If the data with the priority of "high" and "low" are received, items 1 and 2 and items 6 and 7 are displayed. On the other hand, if each data with "medium" or "low" priority is received but each data with "high" priority is not received, all the display items are left blank without being displayed. .

1 train guidance display system, 10 management device, 11 management side wireless device, 13 operation unit, 14 display unit, 15 communication unit, 17 control unit, 171 communication execution control unit, 172 display information communication processing unit, 173 error detection unit, 174 approach notification transmission control unit 175 monitoring information transmission control unit 176 cycle change unit 177 cycle recovery change unit 178 first cycle switching control unit 19 storage unit 191 management program 193 communication setting data 195 current transmission cycle , 197 reception level for determination, 200 communication status data, 210 monitoring status data, 211 communication result, 213 notification content data, 220 update status data, 230 departure/passage data, 231 communication result, 233 notification content data, 240 Approach data 241 Communication result 243 Notification content data 30 Guidance display device 31 Display-side wireless device 33 Operation unit 37 Control unit 371 Monitoring information reception processing unit 372 Display information reception processing unit 373 Guidance Display control unit 374 Shift display control unit 375 Approach notification display control unit 39 Storage unit 391 Guidance display program 393 Current monitoring information period 400 Train guidance display data 410 Leading train data 420 Late train data 40 Guidance indicator, 3 traffic control system

Claims (6)

Based on given guidance display information, a guidance display device that displays information about the train at a display position determined in the order of departure or passing of the train, and manages the train guidance display on the guidance display device. A train guidance display system communicably connected to a management device for
The management device
a display information communication processing unit that performs display information communication processing for transmitting the guidance display information to the guidance display device each time a predetermined guidance display is updated;
a monitoring information transmission control unit that controls transmission of monitoring information to the guidance display device in a first period;
an error detection unit that detects a communication error related to the display information communication process;
a cycle changing unit configured to change a transmission cycle of the monitoring information transmission control unit to a second cycle shorter than the first cycle when a communication error is detected by the error detection unit;
with
The guidance display device
a guide display control unit that updates and controls train guide displays based on the guide display information when the guide display information is received from the management device;
When the cycle of the monitoring information received from the management device changes from the first cycle to the second cycle, the display position of the train information being displayed is advanced and displayed, and the last display position is displayed. A shift display control unit that performs display control for erasing the information of
Train guidance display system with The cycle changing unit changes the transmission cycle from the second cycle when the communication error is detected by the error detection unit when the transmission cycle of the monitoring information transmission control unit is the second cycle. change to a shorter third period,
The shift display control unit erases the train information being displayed when the cycle of the monitoring information received from the management device changes to the third cycle.
The train guidance display system according to claim 1. The display information communication processing unit controls transmission of predetermined essential guide display information among the guide display information in advance,
The guidance display control unit, when receiving only the mandatory guidance display information, performs control to update the train guidance display based on the mandatory guidance display information.
The train guidance display system according to claim 1 or 2. The guide display device includes a completion notification control unit that performs control to transmit a reception completion notification to the management device when the guide display information is received,
The error detection unit determines the communication error based on whether or not the reception completion notification is received.
The train guidance display system according to any one of claims 1 to 3. The first cycle includes a first short cycle and a first long cycle that are longer than the second cycle and have different lengths of the cycle,
The management device
When the transmission cycle of the monitoring information transmission control unit is other than the first cycle and when the communication related to the display information communication process is successful, the transmission cycle of the monitoring information transmission control unit is changed to the first cycle. a cycle recovery changing unit that changes to a short cycle of 1;
While the transmission cycle of the monitoring information transmission control unit is the first cycle, the transmission cycle of the monitoring information transmission control unit is set to the first cycle according to the communication status between the management device and the guidance display device. A first cycle switching control unit that switches between the short cycle and the first long cycle of
comprising
A train guidance display system according to any one of claims 1 to 4. The management device comprises an approach notification transmission control unit that performs control to transmit a predetermined train approach notification to the guide display device when a predetermined train approach signal is externally input,
When receiving the train approaching notification, the guidance display device controls display based on the train approaching notification in place of the train guidance display for the later train being displayed, and displays the preceding train without receiving the train approaching notification. An approach notification display control unit that controls a predetermined display to the effect that a train is approaching instead of the train guide display of the late train being displayed when a predetermined approach estimation timing based on the departure time or passage time has come. comprising
The train guidance display system according to any one of claims 1 to 5.

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