Railroad crossing monitoring system

Abstract

To promptly grasp the location of a railroad crossing where power fault is occurring.SOLUTION: Railroad facilities for a railroad are configured to be subjected to backup by lead batteries so as to enable a railroad crossing to operate even when a blackout occurs. However, since the lead batteries have merely a function to backup the power supply, it is uncertain from a remote site whether the blackout is continued or is recovered. Moreover, it is difficult for a maintenance worker to grasp the railroad crossing where the blackout is occurring, and such a worker must confirm the situation at a site. Hence, upon discharging of a BBU 30, a monitoring device 40 is enabled to take out information from the BBU 30 by a communication or signal line. By taking out the information from the BBU 30 in this way, the state of the BBU 30 can be confirmed from a remote site, and when there is a BBU 30 that is in a discharged state, the monitoring device 40 also can identify the installation location of such a BBU, and notify a terminal 50 of the identified installation location. This enables the maintenance worker to grasp the installation location, and to immediately go to such an installation location.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a railroad crossing monitoring system. [Background technology]

[0002] As conventional techniques, techniques such as those disclosed in Patent Documents 1 to 4 have been disclosed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-037701 [Patent Document 2] Japanese Patent Application Publication No. 2018-074703 [Patent Document 3] Special Publication No. 2014-517983 [Patent Document 4] International Publication No. WO2013 / 140605 Summary of the Invention [Problem to be solved by the invention]

[0004] Various conventional technologies have been proposed, but there is a demand for a railroad crossing monitoring system that can quickly determine the location of a railroad crossing where a power failure is occurring.

[0005] Therefore, an object of the present invention is to provide a railroad crossing monitoring system that can quickly determine the location of a railroad crossing where a power failure is occurring. [Means for solving the problem]

[0006] The present invention employs the following solutions. Note that the solutions below are merely examples, and the present invention is not limited to these. The present invention can be an invention that includes at least one of the invention-specifying matters shown in the solutions below. Furthermore, each invention-specifying matter shown in the solutions below can be made into a subordinate concept by adding an element that limits the invention-specifying matter, or can be made into a superordinate concept by removing an element that limits the invention-specifying matter.

[0007] The railroad crossing monitoring system of the solution is, for example, a railroad crossing monitoring system that monitors a plurality of railroad crossings installed on a railway line, and includes: a railroad crossing control device installed at each of the plurality of railroad crossings; a backup device installed at each of the plurality of railroad crossings and connected to the railroad crossing control device, which supplies power to the railroad crossing control device by discharging power in the event of a power failure in the railroad crossing control device; and a monitoring device that can communicate with the backup device, wherein, upon discharging power, the backup device transmits specific information to the monitoring device for identifying the location where the backup device is installed, and the monitoring device identifies the location where the backup device is installed based on the received specific information. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a railroad crossing monitoring system that can quickly determine the location of a railroad crossing where a power failure is occurring. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a block diagram showing a railroad crossing monitoring system 100 according to an embodiment. [Figure 2] 2 is a block diagram showing a railroad crossing control device 20, a BBU 30, a monitoring device 40, and a terminal 50. FIG. [Figure 3] 10 is a flowchart showing an example of the procedure of a monitoring process executed by the monitoring device 40. [Figure 4] 1 is a diagram showing a railroad crossing confirmation operation performed by the railroad crossing monitoring system 100 of an embodiment. [Figure 5] 10A and 10B are diagrams illustrating a checking operation of a railroad crossing by a railroad crossing monitoring system 100A of a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the following embodiment is shown as a preferred example of a railroad crossing monitoring system, and the present invention is not limited to this example.

[0011] FIG. 1 is a block diagram showing a railroad crossing monitoring system 100 according to an embodiment. The railroad crossing monitoring system 100 is a system that monitors a plurality of railroad crossings 10 installed on a railroad line. The railroad crossing monitoring system 100 can monitor one or a plurality of railroad lines. The railroad crossing monitoring system 100 includes a railroad crossing control device 20, a BBU 30 (backup device, battery backup unit, power storage unit), and a monitoring device 40.

[0012] The railroad crossing control device 20 is installed at each of the multiple railroad crossings 10, and is a device (railroad crossing facility) that controls each of the railroad crossings 10.

[0013] The BBU 30 is installed at each of the multiple railroad crossings 10 and is connected to the railroad crossing control device 20. In the event of a power failure (e.g., a power outage, rectifier failure, etc.) at the railroad crossing control device 20, the BBU 30 supplies power to the railroad crossing control device 20 by discharging power.

[0014] The monitoring device 40 is a device that can communicate with the BBU 30. The monitoring device 40 and the BBU 30 are connected by a communication I / F (interface) such as the Internet or a signal line. The monitoring device 40 is, for example, a server located in a center where the monitoring device 40 is installed. Note that the monitoring device 40 may also be located in a location other than the center.

[0015] The number on the left side of the parentheses next to the railroad crossing 10 shown in the figure indicates the route number, and the number on the right side of the parentheses indicates the location number. Specifically, crossing 10 (#1-1) indicates the "first crossing" on "line 1." Crossing 10 (#1-2) indicates the "second crossing" on "line 1." Crossing 10 (#2-1) indicates the "first crossing" on "line 2." Crossing 10 (#2-2) indicates the "second crossing" on "line 2." Crossing 10 (#nm) indicates the "mth crossing" on "line n." Note that n and m are any natural numbers greater than or equal to 2.

[0016] The same applies to the railroad crossing control device 20 and the BBU 30 shown in the figure. For example, the railroad crossing control device 20(#1-2) indicates that the railroad crossing control device is installed at the second railroad crossing on the line 1. Also, the BBU 30(#1-2) indicates that the BBU is connected to the railroad crossing control device installed at the second railroad crossing on the line 1.

[0017] FIG. 2 is a block diagram showing the railroad crossing control device 20, the BBU 30, the monitoring device 40, and the terminal 50. The railroad crossing control device 20 includes a rectifier 21 and a load section 22. The rectifier 21 is a device that generates electric power of a predetermined voltage by using commercial electric power supplied from an external commercial power source. The load unit 22 is a device that operates using the power supplied from the rectifier 21. The load unit 22 includes, for example, a circuit breaker installed at a railroad crossing, and opens and closes a circuit breaker bar attached to the circuit breaker in accordance with the operation of a train.

[0018] The BBU 30 includes a charge control unit 31, a secondary battery 32, a discharge control unit 33, a detection unit , and a communication unit . The charging control unit 31 is a part that charges the secondary battery 32 using the power supplied from the rectifier 21 . The secondary battery 32 is a power source for the BBU 30, and is configured by connecting nickel-metal hydride secondary batteries in series or in parallel. The discharge control unit 33 is a part that discharges the power of the secondary battery 32 to the railroad crossing control device 20 when the power supply from the rectifier 21 is interrupted. The power supply from the rectifier 21 is interrupted when, for example, the commercial power source is turned off (when there is a power outage) or when the rectifier 21 breaks down.

[0019] The detection unit 34 is a part that detects various states (charging state, standby state after charging is completed, discharging state, remaining power state of the secondary battery, etc.) of the BBU 30. The detection unit 34 can detect the state of the secondary battery 32.

[0020] The communication unit 35 is a part that communicates with the communication unit 41 of the monitoring device 40. When the BBU 30 is discharged, the communication unit 35 transmits to the monitoring device 40 identification information for identifying the location where the BBU 30 is installed. The identification information may be the identification number of the BBU 30 (for example, "#1-1", "#1-2", etc.) or location information of the BBU 30 (information on the location of the BBU 30 determined using GPS or the like). The communication unit 35 also transmits to the monitoring device 40 various status information including information on the various statuses detected by the detection unit 34 (information including discharge status information indicating a discharge status and remaining power information (information from 0% to 100%) regarding the remaining power).

[0021] The monitoring device 40 includes a communication unit 41, a determination unit 42, and an information transmission unit 43. The communication unit 41 is a part that communicates with the communication unit 35 of the BBU 30. The communication unit 41 receives the specific information and various state information transmitted by the communication unit 35 of the BBU 30 (takes out information from the BBU 30).

[0022] The BBU 30 may transmit information to the monitoring device 40 on its own initiative, or may transmit information in response to a transmission request periodically (for example, about once every 10 minutes) transmitted by the monitoring device 40. The BBU 30 may also change the transmission method depending on the type of information; for example, it may transmit specific information when discharge begins, and transmit various status information periodically regardless of whether discharge is occurring or not.

[0023] The determination unit 42 is a part that determines the identification information and various state information received by the communication unit 41. Based on the identification information and various state information received by the communication unit 41, the determination unit 42 checks whether there is a BBU 30 in a discharging state, and if there is a BBU 30 in a discharging state, identifies the location where the BBU 30 is installed. Furthermore, when the determination unit 42 receives identification information from multiple BBUs 30, it can identify the range in which a power failure is occurring. Furthermore, the determination unit 42 can also determine the state of the BBU 30 based on various state information.

[0024] The location where the BBU 30 is installed (the installation location of the BBU 30) may be identified from a location linked to the identification number of the BBU 30, or may be identified based on the location information of the BBU 30. When linking is used, the identification number of the BBU 30 and the location where the BBU 30 is installed must be linked and stored in advance in a storage unit or the like of the monitoring device 40.

[0025] The information transmitting unit 43 is a part that transmits information (for example, first information, second information, third information, etc.) to the terminal 50 according to the determination result of the determining unit .

[0026] The terminal 50 includes an information receiving unit 51 and a display unit 52. The terminal 50 may be a portable information processing terminal such as a smartphone, an information processing terminal installed in a vehicle, or an information processing terminal such as a personal computer. The information receiving unit 51 is a part that receives the information transmitted by the information transmitting unit 43 of the monitoring device 40 . The display unit 52 is a part that displays received information (for example, first information, second information, third information, etc.).

[0027] During a power outage, the BBU 30 discharges the secondary battery 32 (battery) and can communicate the discharging state to a monitoring device 40 (external) via communication or signal. By installing such BBUs 30 over a wide area of ​​railway tracks and having the monitoring device 40 at the center monitor the BBUs 30 and determining the location of the discharging BBUs 30, it becomes possible to identify and grasp the location and section of the power outage.

[0028] 3 is a flowchart showing an example of the procedure of the monitoring process executed by the monitoring device 40. The following process can be executed by using at least one of the processing units of the communication unit 41, the determination unit 42, and the information transmission unit 43 of the monitoring device 40.

[0029] Step S10: The monitoring device 40 executes a process to check whether the BBU 30 is in a discharging state. If it is confirmed that the BBU 30 is in a discharging state (Yes), the monitoring device 40 executes step S11. On the other hand, if it is not confirmed that the BBU 30 is in a discharging state (No), the monitoring device 40 does not execute the following process. Whether the BBU 30 is in a discharging state can be confirmed from specific information and various state information.

[0030] In this embodiment, since multiple BBUs 30 are connected to one monitoring device 40, the monitoring device 40 checks the discharge status of all connected BBUs 30. If there are BBUs 30 in a discharged state, the following process is performed for each BBU 30 in a discharged state.

[0031] Step S11: The monitoring device 40 executes a process of transmitting first information to the terminal 50. That is, when the monitoring device 40 confirms that the BBU 30 is discharging based on the specific information and various state information, it transmits first information that conveys the location where the BBU 30 is installed to the terminal 50 that can be confirmed by the maintenance personnel who maintain the railroad crossing. The content of the first information is, for example, "Discharge is occurring at the railroad crossing (BBU) with location information A1" or the like (content that warns the maintenance personnel).

[0032] "A1" is information that includes at least one of the following: latitude and longitude, location, name of the crossing, name of the adjacent road, name of the railway operator, name of the railway line, etc. If there are multiple BBUs 30 in the discharged state, in addition to this information, range information (for example, crossings in the XX district, crossings in the △△ area, crossings on the □□ line, etc.) can also be added. This also applies to "A2" and "A3" below.

[0033] Step S12: The monitoring device 40 executes a process to confirm whether or not the discharge has continued for a predetermined time. If it has been confirmed that the discharge has continued for the predetermined time (Yes), the monitoring device 40 executes step S13. On the other hand, if it has not been confirmed that the discharge has continued for the predetermined time (No), the monitoring device 40 then executes step S14. Whether or not the discharge has continued for the predetermined time can be confirmed by starting a timer from the start of the discharge and monitoring the timer. The predetermined time can be set to a long time, such as several hours to several tens of hours.

[0034] The reason for setting a predetermined time is that the power outage may be restored in a few hours. When the power is restored, the discharge of the BBU30 will automatically finish, so no emergency work by maintenance personnel will be necessary. However, even in such a case, maintenance personnel can still inspect the railroad crossing.

[0035] Step S13: The monitoring device 40 executes a process for transmitting the second information. That is, when the monitoring device 40 confirms based on the specific information and various state information that the discharge of the BBU 30 has continued for a predetermined time, it transmits the second information to the terminal 50 that can be checked by the maintenance personnel who maintain the railroad crossing, urging them to head to the location where the BBU 30 is installed. The content of the second information is, for example, "Discharge is continuing at the railroad crossing (BBU) with location information A2. Please head to the railroad crossing. Please inspect the BBU and rectifier." (content for dispatching a maintenance personnel)

[0036] Step S14: The monitoring device 40 executes a process to check whether the remaining power has reached a predetermined value (for example, a value corresponding to 20% remaining battery power). If it is confirmed that the remaining power has reached the predetermined value (Yes), the monitoring device 40 executes step S15. On the other hand, if it is not confirmed that the remaining power has reached the predetermined value (No), the monitoring device 40 does not execute step S15. Whether the remaining power has reached the predetermined value can be confirmed from various status information (remaining power information).

[0037] Step S15: The monitoring device 40 executes a process for transmitting third information. That is, when the monitoring device 40 confirms based on the various state information that the remaining power of the BBU 30 has reached a predetermined value, it transmits third information to the terminal 50 that can be checked by the maintenance personnel who maintain the railroad crossing, urging them to head to the location where the BBU 30 is installed. The content of the third information is, for example, "The remaining battery power of the railroad crossing (BBU) with location information A3 is low. Please head to the railroad crossing. Please inspect the BBU and rectifier. If possible, please replace the BBU (secondary battery)" or the like (contents for dispatching a maintenance personnel).

[0038] The first information, second information, and third information may be transmitted from the monitoring device 40 to the terminal 50 using an email function, or may be transmitted using a dedicated application, SNS, or the like. The first information, second information, and third information may be text information, image information including a route map as shown in FIG. 4, or a combination thereof.

[0039] After completing this series of processes, the monitoring device 40 returns to step S10 and repeats the processes up to that point. Note that the process of transmitting each piece of information may be configured not to be executed again once it has been executed, or may be executed periodically to call attention to the process.

[0040] FIG. 4 is a diagram showing a checking operation of a railroad crossing by the railroad crossing monitoring system 100 of the embodiment. Here, an example is shown in which the railroad crossing monitoring system 100 monitors two lines (line 1 and line 2). Five railroad crossings 10 are installed on the line 1 (railroad crossings 10(#1-1) to 10(#1-5)). Each of the railroad crossings 10 on the line 1 is equipped with a railroad crossing control device (not shown), and each of the railroad crossing control devices is equipped with a BBU 30 (BBU30(#1-1) to BBU30(#1-5)).

[0041] Five railroad crossings 10 are also installed on line 2 (railroad crossings 10(#2-1) to 10(#2-4), and 10(#1-3)). However, railroad crossing 10(#1-3) is a railroad crossing shared by lines 1 and 2. Furthermore, each railroad crossing 10 on line 2 is equipped with a railroad crossing control device (not shown), and each railroad crossing control device is set with a BBU 30 (BBU30(#2-1) to BBU30(#2-4)). However, BBU30(#1-3) is a BBU shared by lines 1 and 2.

[0042] Here, it is assumed that a power outage occurs at railroad crossing 10(#1-2), railroad crossing 10(#1-3), and railroad crossing 10(#1-4) (power outage section). In this case, BBU30(#1-2), BBU30(#1-3), and BBU30(#1-4) enter a discharging state, and the other BBUs continue to be in a standby state.

[0043] Then, when discharged, BBU30(#1-2), BBU30(#1-3), and BBU30(#1-4) transmit identification information and various state information to the monitoring device 40. The monitoring device 40 can identify the positions of BBU30(#1-2), BBU30(#1-3), and BBU30(#1-4) based on the identification information and various state information.

[0044] In this case, the monitoring device 40 can also identify the scope of the power outage (the area where the power outage is occurring) based on the identification information and various status information. The monitoring device 40 also transmits the first information to the terminal 50. Furthermore, the monitoring device 40 can also transmit the second information and the third information to the terminal 50 depending on the situation.

[0045] This allows the crossing maintenance personnel to focus on only the crossings 10(#1-2), 10(#1-3), and 10(#1-4), and to efficiently inspect only these crossings. In addition, the monitoring device 40 can grasp the power outage section through remote monitoring, and can clearly indicate the maintenance target.

[0046] In this way, the railroad crossing monitoring system 100 has a power outage area detection function. The power outage area detection function is a function that can detect (identify) railroad crossing facilities that are experiencing a power outage by monitoring the BBUs 30 installed at railroad crossing facilities on the railway line.

[0047] FIG. 5 is a diagram showing a railroad crossing checking operation by the railroad crossing monitoring system 100A of the comparative example. The difference between the railroad crossing monitoring system 100 of the embodiment and the railroad crossing monitoring system 100A of the comparative example is that the railroad crossing monitoring system 100A of the comparative example does not have a monitoring device 40, and each BBU does not have the function of communicating with the monitoring device 40.

[0048] For this reason, in the railroad crossing monitoring system 100A of the comparative example, the railroad crossing maintenance personnel are unable to identify the sections that have experienced a power outage. Also, in the railroad crossing monitoring system 100A of the comparative example, it is not possible to perform inspection work remotely, so the railroad crossing maintenance personnel must go directly to the location where the BBU is installed to check. Furthermore, the railroad crossing maintenance personnel must also visit the railroad crossings 10 (#1-1) and 10 (#1-5) that are not experiencing a power outage in order, and after completing the inspection of line 1, they must also visit all the railroad crossings on line 2 in order, which makes it impossible to perform efficient inspections.

[0049] As described above, this embodiment has the following advantages. (1) According to this embodiment, the BBU 30 transmits specific information to the monitoring device 40 when it discharges, and the monitoring device 40 identifies the location where the BBU 30 is installed based on the specific information received from the BBU 30. Therefore, it is possible to start responding at an early stage, at the start of discharge, and to quickly determine the location of the railroad crossing where a power failure is occurring.

[0050] (2) According to this embodiment, the power outage section can be identified through remote monitoring, eliminating the need to search for inspection targets; maintenance personnel only need to go to the target site (target area).

[0051] (3) According to this embodiment, the first information conveying the location where the BBU 30 is installed is transmitted to the terminal 50 that can be confirmed by the maintenance personnel, so the maintenance personnel can prepare in advance.

[0052] (4) According to this embodiment, if the discharge continues for a long time, second information is sent to the terminal 50 that can be confirmed by the maintenance personnel, urging the maintenance personnel to go to the location where the BBU 30 is installed. Therefore, when a situation arises in which it is necessary to dispatch a maintenance personnel, accurate instructions can be given to the maintenance personnel, and the maintenance personnel can actually go to the site and perform the inspection.

[0053] (5) According to this embodiment, when the remaining power becomes low, third information is transmitted to the terminal 50 that can be checked by the maintenance personnel, urging the maintenance personnel to go to the location where the BBU 30 is installed. Therefore, when a situation arises in which a maintenance personnel must be dispatched, the maintenance personnel can be given accurate instructions, and the maintenance personnel can actually go to the site and perform an inspection.

[0054] (6) Railway crossing equipment is designed to operate even during power outages using lead-acid batteries as backup. However, lead-acid batteries only function to back up the power supply, making it impossible to remotely determine whether the power outage continues or whether power has been restored. The same is true when the rectifier, which is part of the power supply equipment, fails. Therefore, periodic inspections by maintenance personnel are essential. Furthermore, maintenance personnel cannot identify the affected crossings, so they have no choice but to check on-site (they do not know which parts of the crossing are affected during a power outage). Therefore, in this embodiment, the lead-acid battery is replaced with the BBU 30 described above, and the monitoring device 40 can retrieve information from the BBU 30 via communication or signal lines when the BBU 30 discharges. In this way, retrieving information from the BBU 30 not only allows the status of the BBU 30 to be checked remotely, but also, if a discharged BBU 30 is found, the monitoring device 40 identifies its location and notifies the terminal 50, allowing maintenance personnel to locate the location or directly proceed to the location.

[0055] (7) According to this embodiment, a railroad crossing operation method is adopted that effectively utilizes the status detection of the BBU30 that uses a nickel-metal hydride secondary battery, so that a system can be provided that operates to identify the location of the power outage while securing power even when there is no commercial power during a power outage.

[0056] (8) Comparison with the above-mentioned patent documents is as follows: The technology of this embodiment is a technology that makes it possible to identify the location of the BBU 30 where a power failure is occurring by grasping the location of the discharging BBU 30. Furthermore, the technology of this embodiment is a technology that identifies and notifies the location of the power outage by the discharging operation of the secondary battery 32 when a power outage occurs.

[0057] On the other hand, the technology of Patent Document 1 is a technology for communicating power outage information by wireless communication, but does not describe the trigger for the power outage. Furthermore, the technology of Patent Document 2 is a power outage monitoring server that uses a storage battery, but this technology does not include a method for detecting a power outage. Furthermore, the technology of Patent Document 3 is a system for monitoring the charging and discharging of a battery pack, but it is not possible to detect a power outage. Furthermore, the technology of Patent Document 4 is a monitoring system for charging and discharging a secondary battery, but this is a simple monitoring system for charging and discharging that does not involve communication or power outage detection.

[0058] [Modifications] The present invention is not limited to the above-described embodiment, and can be practiced in various modified forms. (1) The timing and method of transmitting the specific information and the various status information are arbitrary. For example, the first transmission may be performed when discharge starts, and subsequent transmissions may be performed at any timing. Furthermore, the various status information may be transmitted periodically even if discharge has not started, or may be transmitted when a change in status occurs. (2) The monitoring device 40 does not need to identify the area where the power failure occurs.

[0059] (3) The monitoring device 40 may simply identify the location of the BBU 30. The monitoring device 40 can prevent at least one of the first information, the second information, and the third information from being transmitted. The information that is not to be transmitted can be communicated to the maintenance personnel by a center staff member via a telephone or the like. (4) Although the secondary battery has been described as a nickel-metal hydride secondary battery, other secondary batteries may also be used.

[0060] (5) When multiple power outage locations are identified, the monitoring device 40 may extract the shortest route to visit the multiple power outage locations and notify the terminal 50 of information about the extracted shortest route. In this way, the time required for maintenance personnel to patrol can be reduced. [Explanation of symbols]

[0061] 10 Railroad Crossing 20 Railroad crossing control device 21 Rectifier 22 Load section 30 BBU 31 Charging control unit 32 Secondary battery 33 Discharge control unit 34 Detection unit 35 Communications Department 40 Monitoring equipment 41 Communications Department 42 Judgment section 43 Information Transmission Department 50 devices 51 Information Receiving Unit 52 Display section 100, 100A Railroad Crossing Monitoring System

Claims

1. A railroad crossing monitoring system that monitors a plurality of railroad crossings installed on a railroad line, a railroad crossing control device installed at each of the plurality of railroad crossings; a backup device that is installed at each of the plurality of railroad crossings and is connected to the railroad crossing control device, and that supplies power to the railroad crossing control device by discharging power when a power failure occurs in the railroad crossing control device; a monitoring device capable of communicating with the backup device, the backup device, upon discharge, transmits to the monitoring device specific information for identifying a location where the backup device is installed; A railroad crossing monitoring system characterized in that the monitoring device identifies the location where the backup device is installed based on the received identification information.

2. The railroad crossing monitoring system according to claim 1, A railroad crossing monitoring system characterized in that the monitoring device, when receiving the specific information from multiple backup devices, identifies the area in which a power failure is occurring.

3. The railroad crossing monitoring system according to claim 1, the backup device is capable of transmitting discharge status information indicating that the backup device is in a discharge status to the monitoring device; A railroad crossing monitoring system characterized in that, when the monitoring device confirms that the backup device is discharging based on the discharge status information, it transmits first information communicating the location where the backup device is installed to a terminal that can be confirmed by a maintenance worker maintaining the railroad crossing.

4. The railroad crossing monitoring system according to claim 1, the backup device is capable of transmitting discharge status information indicating that the backup device is in a discharge status to the monitoring device; A railroad crossing monitoring system characterized in that, when the monitoring device confirms based on the discharge status information that the discharge of the backup device has continued for a predetermined period of time, it sends second information to a terminal that can be confirmed by maintenance personnel maintaining the railroad crossing, urging them to head to the location where the backup device is installed.

5. The railroad crossing monitoring system according to claim 1, the backup device is capable of transmitting remaining power information regarding remaining power to the monitoring device; A railroad crossing monitoring system characterized in that, when the monitoring device confirms based on the remaining power information that the remaining power of the backup device has reached a predetermined value, it sends third information to a terminal that can be confirmed by maintenance personnel maintaining the railroad crossing, urging the maintenance personnel to head to the location where the backup device is installed.

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