JP4232015B2 - Train approach warning system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention makes it possible to judge from the GPS information whether or not the worker is in a position approaching the railroad track during the train operation time zone, and to be able to perform a train approach warning without waste when in the approached position. It was it relates to the train proximity warning system.
[0002]
[Prior art]
Conventionally, for workers who work on the railway track and workers who work near the railroad track during the train operating hours, the train has been approached with a train guard. It is informed and the evacuation operation is performed to prevent contact accidents with the train. However, in the case of a train watcher, since it is by visual observation, information on the approach of the train may be delayed due to forgetting, etc., and there is a possibility that the worker may be put in a serious danger.
[0003]
Therefore, conventionally, a device for detecting a train is temporarily or fixedly installed on the ground beside the track, and when the approach of the train is detected, the worker is notified of the approach of the train by light emission, an alarm sound, or the like. However, in this case, installation work on the ground, temporary work, restoration work, and the like are necessary, and there is a disadvantage that the range of use is limited.
In addition, in the past, there was also an alarm signal from a signal transmission device provided on the track that was received wirelessly by the worker at the work site to obtain train approach information. In this case, extra information other than necessary information is required. Also received strong radio waves (both radio waves when both the upstream and downstream signal transmitters issued alarm signals), and the train approach alarm ringing time was longer than necessary. .
[0004]
Furthermore, conventionally, as shown in Patent Document 1, necessary train information is transmitted from the host computer of the train operation management room to the portable terminal of the maintenance worker, and the train information is visually displayed on the screen of the portable terminal of the maintenance worker. There is a technique that displays or warns approach information. In this prior application technique, a worker who is performing maintenance work on a track first specifies the position where the maintenance worker is located by transmitting the set number of the closed section to the host computer using a portable terminal. Then, from the train schedule that is sequentially input to the host computer based on the train diagram, search for the presence or absence of a train approaching the position where the maintenance worker is located, and send it to the mobile terminal of the maintenance worker, A warning sound is emitted when the train approaches.
[0005]
[Patent Document 1]
JP-A-8-272855 [0006]
[Problems to be solved by the invention]
However, in the technique disclosed in Patent Document 1, the position of the maintenance worker is specified by the closed section number manually input to the portable terminal by the maintenance worker himself. Since it is manual input by the maintenance worker, it cannot be denied that there is a possibility of an input error or the like, and it has not been a measure that can completely prevent the maintenance worker from contacting the train. In view of this, in the technique of Patent Document 1, in addition to the manual input of the maintenance worker, the positional information using the GPS is used together to compare the two so as to prevent the input error of the blockage section number. However, it is premised on the manual input of the maintenance worker itself, and there are problems such as the need for a program for correcting this when there are two location information processing programs and input errors. there were.
[0007]
The use of GPS in the technique of Patent Document 1 is used as an auxiliary to back up manual input errors of maintenance workers, and this GPS position information is specifically reflected on the track on the electronic map. It was not a thing, and automation of train approach information processing was not realizable.
[0008]
Furthermore, in the technique of Patent Document 1, the position where the maintenance worker is present is specified in units of closed sections set for each track. The length of this blockage section varies depending on the track conditions, and covers a wide range of several hundred meters to several kilometers. Therefore, even when maintenance work is performed on the start side of the closed section and when maintenance work is performed on the end side, the timing at which the evacuation action for the approach of the train should be different is uniform. The evacuation action and its recovery action are performed, and there is a disadvantage that a lot of waiting time is wasted in a series of operations to evacuate the train approach, inefficiency, and time to complete maintenance work becomes long. It was. This causes the maintenance worker to stay for a long time in an environment where a train contact accident may occur, which is not preferable.
[0009]
The present invention is an improvement and removal in view of the above-described problems, and it is possible to optimally issue a train approach warning by reflecting GPS information on a track on an electronic map obtained by further subdividing the blockage section. can is intended to St. provides a train proximity warning system.
[0010]
[Means for Solving the Problems]
Thus, the means of claim 1 adopted by the present invention in order to solve the above-mentioned problems is a train position extracting device that extracts blockage section information where a train is located from a CTC that controls the operation status of the train, and a GPS. Mobile terminal for positioning that detects the current position of the worker by receiving the radio wave, mobile terminal for alarm that transmits a warning of train approach to the worker, information about the position coordinates of the track and multiple blocked sections on the track A central control device that holds information on the worker position area that is subdivided into two , and the central control device has a distance from the worker position to the track detected by GPS information from the positioning portable terminal within a certain range. in some case, selects the closest worker location area to the worker position, range distance is given from the operator location area to occlusion section in which the position of the train obtained from said train position extractor Is a train proximity warning system which is characterized in that the alert of the train approaching to the alarm for a portable terminal of the workers when they become.
[0011]
In the present invention, one closed section on the track is subdivided into a plurality. And in this subdivided section, the position where the worker is present is reflected from the GPS information and specified. As a result, when the worker is at the start end of one blockage section, the maintenance worker can evacuate even if a train approach alarm is issued when the train enters the blockage section immediately before the blockage section. Compared to the technique of Patent Document 1, the waiting time is reduced. Also, when the worker is at the end of the closed section, if the train enters the closed section immediately before the closed section, the maintenance worker can sufficiently evacuate if a train approach warning is issued. It is possible to take action.
[0012]
The present invention, the position of the worker by receiving radio waves from GPS plotted on the electronic map, the distance from the plot points of the operator until the line is membered work if within a certain range close to the line When it is determined that the train is in position, an alarm is issued when the train approaches .
[0013]
That is, the maintenance worker position obtained from the GPS is within the predetermined distance range from the line on the electronic map, it is determined that the train is dangerous to close, and to emit alarm train approaching.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The configuration of the present invention will be described below based on the embodiment of the invention shown in the drawings. 1 to 6 relate to an embodiment of the present invention, FIG. 1 is a block diagram showing a configuration of the entire train approach warning system, and FIG. 2 is a drawing for explaining a worker position specifying method, 3 is a diagram showing a configuration for obtaining train position information, FIG. 4 is a diagram in which a part of information of the train control device is output, FIG. 5 is a diagram for explaining a determination procedure of a train approach alarm, FIG. These are the drawings which output a part of information from a train control device for judgment of a train approach warning.
[0015]
As shown in FIG. 1, in this embodiment, a worker 2 who performs maintenance and inspection on the track 1 holds a portable terminal 3 equipped with a GPS receiver, and calls position information from the GPS 4 by telephone. It is made to transmit to the central control apparatus 7 which manages the operation condition of the train 6 via the base station 5. FIG. In addition, the position information of the train 6 is sent from the field device 8 of the CTC (Central Train Control Device) to the central device 9 and stored as operation management information. Then, the position information of the corresponding train is extracted from the extracted information by the extracting device 10 and transmitted to the central control device 7. The central control device 7 collates the GPS position information from the portable terminal 3 of the worker and the train position information from the extraction device 10 on an electronic map, and there is a train 6 that approaches the position where the worker 2 is located. In addition, an alarm is transmitted to the portable terminal 3 of the worker. Below, the method to specify the position of the worker 2, the method to determine the position of the train 6, and the determination point in the case of issuing an alarm from these position information will be described.
[0016]
As shown in FIG. 2, first, the position of the worker 2 is subdivided into a plurality of sections of a railway track, and the section points (positional coordinates) of each section are about a kilometer on the railway track. Is displayed. And the position information by GPS4 from a worker's portable terminal 3 is plotted on an electronic map, and a circle is drawn from the plotted points to determine whether or not the track 1 is within a predetermined distance range. When the circle intersects the track 1, the worker 2 determines that it is within a predetermined distance range from the track 1, and issues a warning when the train 6 approaches. When the worker 2 is outside the predetermined distance range from the track 1, it is determined that the worker 2 is in a safe position that does not need to issue an alarm even if the train approaches.
[0017]
Next, when it is determined that the worker 2 is within a predetermined distance range from the track 1, the position from the GPS 4 with respect to a straight line connecting segment points obtained by subdividing one block section on the track into a plurality of segments. A perpendicular line is drawn from the point plotted based on the information (the position where the worker is located), the point intersecting the straight line connecting the section points is converted into kilometer on the track, and the position of the worker on the electronic map To do. There is only one point where the perpendicular drawn from the plotted point intersects with the straight line connecting the segment points, and the perpendicular does not intersect with the straight line connecting the other segment points. In addition, the kilometer distance between the respective division points is obtained in advance. Therefore, there is a kilometer where the worker is present in a section of kilometer of a certain neighboring division point, and the position of the worker as electronic data is specified.
[0018]
The method for determining the position of the train 6 is as shown in FIG. That is, when the train 6 enters one block section divided by the traffic lights 11 on the track 1, the track circuit in the block section is short-circuited, and the traffic lights 11 are switched from blue display to red display. When the CTC field device 8 acquires the rise of the short circuit signal of the track circuit due to the entry of the train 6, it can be known that the train 6 has entered the blockage section. This train position information is sent to the control device 7 via the CTC central device 9 and the information extraction device 10. Thereby, the position information of the train 6 is specified as electronic data.
[0019]
FIG. 4 shows a part of track circuit short-circuit signal information obtained when the train 6 enters a certain closed section. In the figure, “Reception date and time” is the time at which the short circuit signal from the track circuit is received (automatically updated every few seconds), and “Train number” is the corresponding train number previously assigned to each train. The train number can be acquired from an operation diagram or the like input to an operation management system (PRC, SRC device) connected to the CTC central device 9 or the like. As for “by line”, 1 is an up line, and 2 is a down line. The “station number” is a number arbitrarily assigned in advance for each station. The “track circuit number” is a number set in advance for each blocked section of the track, and is given to the blocked section when the train with a certain train number enters the blocked section and short-circuits the blocked section. Number. This information is updated at regular intervals of several seconds. For each applicable line (for example, JR Takarazuka Line, Kosai Line, Hadano Line, Nara Line, etc.) All the information on the train that is short-circuited is output from the CTC field device 8 to the CTC central device 9.
[0020]
Next, an information processing method in the case of issuing a train approach warning based on the position information of the worker 2 and the position information of the train 6 obtained in this way will be described with reference to FIG. As shown in the figure, both the up line and the down line are divided into blockage sections for each traffic light 11, and each blockage section is further subdivided into an arbitrary number of continuous areas as "worker position areas". A number is assigned.
[0021]
Now, it is assumed that the position information obtained from the GPS by the portable terminal 3 held by the worker 2 is specified as the position A of the worker position area “16”. In this worker position A, when the traveling train 6 approaches, the “train line-of-sight distance” set in advance as the distance that the worker 2 can take the evacuation operation is two sections of the closed sections CT and DT. . Therefore, when the control device 7 receives a rising signal when the train 6 enters the blockage section DT (a signal when the track circuit at the start position of the blockage section DT is short-circuited), the control device 7 connects the communication line of the telephone station 5. An alarm is transmitted to the portable terminal 3 possessed by the worker 2 at the site, and this is displayed on the terminal screen to generate an alarm sound. On the terminal screen, it is convenient to simultaneously display necessary additional information such as the line of the up line and the down line, the distance to the train, and approaching.
[0022]
On the other hand, it is assumed that the position information obtained from the GPS by the portable terminal 3 owned by the worker 2 is specified as the B position of the worker position area “20”. At the worker position B in this case, when the traveling train 6 approaches, the “train line-of-sight distance” set in advance as the distance that the worker 2 can take the evacuation operation is set in the closed sections CT, DT, and ET. There are three sections. Therefore, when the worker 2 is in the B position, the control device 7 receives a rising signal (a signal when the track circuit at the start position of the closed section ET is short-circuited) when the train 6 enters the closed section ET. When this occurs, an alarm may be sent to the portable terminal 3 of the worker 2 at the site using the communication line of the telephone station 5 and displayed on the terminal screen to generate an alarm sound.
[0023]
As described above, in the train approach warning system according to the present embodiment, the most appropriate “train visibility distance” is applied depending on the position where one worker is subdivided into a plurality of sections and subdivided by the worker. Accordingly, when there are workers at the A position and the B position, the “line-of-sight distance of the train” at the A position is CT and DT, and those at the B position are CT, DT, and ET. On the other hand, in the technique described in Patent Document 1, since the position where the worker is present is determined on the basis of one closed section, both the A position and the B position are at the same position. With regard to the “train visibility distance” that is determined and applied for collision avoidance, three sections of CT, DT, and ET are applied to both the A position and the B position. As a result, when there is an operator at position A, the waiting time becomes longer for the time until the train enters the ET closed section and moves to the DT closed section, and the maintenance work time is increased accordingly. However, there was a drawback that it was delayed unnecessarily.
[0024]
FIG. 6 shows an example of a database for performing specific processing of the central device 7 that issues a train approach warning as described above. In the figure, “Area CD” is a code number assigned to a subdivision, and “Kilometer 1” and “Kilometer 2” are the start and end lines of the subdivision points of the corresponding area. It shows the upper kilometer. “X1 coordinate” and “Y1 coordinate” are latitude / longitude coordinates in GPS of the point corresponding to “kilo distance 1”, and similarly “X2 coordinate” and “Y2 coordinate” correspond to “kilo distance 2”. This is the latitude and longitude coordinates of the GPS point. In addition, the “uphill approach track circuit list” is a list of the timing for issuing an alarm when an upcoming train approaches when the worker is in the corresponding worker position area code. The first two digits of the number indicate the station number, and the last two digits indicate the track circuit number. In this way, it is possible to issue a safer and more appropriate alarm by changing the timing of issuing an alarm depending on where the worker is in an area where a single closed section is subdivided into a plurality of areas. It is possible to significantly improve the efficiency and reduce the burden on workers.
[0025]
By the way, this invention is not limited to embodiment mentioned above, A suitable change is possible. For example, the portable terminal 3 possessed by the worker 2 includes two separate mobile terminals for positioning for outputting GPS information to the central apparatus 7 and an alarm portable terminal for receiving an alarm from the central apparatus 7. It may be a dedicated terminal, or a single dedicated terminal in which these functions are combined.
[0026]
【The invention's effect】
As described above, in the present invention, it has a central control device that determines the presence or absence of a train approach from the train location information from the train location extraction device and the worker location information from the mobile terminal, The central controller allocates worker position information to a section (worker position area) that is subdivided into a single closed section, and the closed section where the train is located is within a predetermined range from the worker position area. When this happens, a train approach warning is sent to the worker's mobile terminal. As a result, even if the worker is in the same closed section, the “train visible distance” that sends an alarm for approaching the train depending on where in the worker position area that subdivides the closed section is appropriate Can be changed. As a result, unnecessary waiting time for collision avoidance is eliminated, and it is possible to improve the efficiency of maintenance work and reduce the burden on workers.
[0027]
In the present invention, the radio wave from the GPS is received and the position of the worker is plotted on the electronic map. If the distance from the plot point of the worker to the track is within a certain range, the worker When the train approaches the train, it is determined that the train is approaching, and a warning is issued, and the plot point is lowered with respect to the straight line connecting the division points of the worker position area on the track on the electronic map. The intersection with the vertical line is converted into kilometer of the track, which is the position of the worker. Thereby, the position information of the maintenance worker can be automatically reflected on the electronic map, and it is possible to automatically determine whether or not an alarm is necessary for the position where the worker is present. Furthermore, in addition to these pieces of position information, by taking into account the position information of the train from the CTC device, it is possible to construct a system that automatically issues a train approach warning.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an entire train approach warning system according to an embodiment of the present invention.
FIG. 2 relates to an embodiment of the present invention, and is a drawing for explaining a worker position specifying method.
FIG. 3 is a diagram illustrating a configuration for obtaining train position information according to an embodiment of the present invention.
FIG. 4 relates to an embodiment of the present invention, and is a diagram in which a part of information of a train control device is output.
FIG. 5 relates to one embodiment of the present invention, and is a drawing for explaining a procedure for determining a train approach warning.
FIG. 6 relates to an embodiment of the present invention, and is a diagram in which a part of information from a train control device for determining a train approach alarm is output.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Track, 2 ... Maintenance worker, 3 ... Mobile terminal, 4 ... GPS satellite, 5 ... Telephone station, 6 ... Train, 7 ... Control device, 8 ... CTC field device, 9 ... CTC central device, 10 ... CTC information Extraction device, 11 ... traffic light

Claims (1)

A train position extraction device that extracts blockage section information where a train is located from a CTC that controls the operation status of the train, a mobile terminal for positioning that receives radio waves from the GPS and detects the current position of the worker , The alarm control mobile terminal for transmitting an alarm to the worker, and a central control device that holds information on the position coordinates of the track and information on the worker position area obtained by subdividing each block section on the track into a plurality of the central control. When the distance from the worker position detected by GPS information from the positioning portable terminal to the track is within a certain range, the device selects the worker position area closest to the worker position, and the worker position area outgoing child alarm of the train approach distance to occlusion section in which the position of the train obtained from the train position extraction device to operator alarming portable terminal when it is within a predetermined range Train proximity warning system according to claim.

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