JP2015174583A - Train approach warning system and portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a train approach warning system capable of more accurately grasping the position of an operator and issuing a warning.SOLUTION: In a train approach warning system including a transmission device 21 installed at an arbitrary interval along a rail track 10 for converting an information signal from a transmission line 20 to a radio signal and transmitting the radio signal and a portable terminal 30 capable of issuing a warning when a train 11 is approaching, a guidepost is provided at any point along the rail track, in which position information on a map depicting the rail track is recorded as unique information. The portable terminal 30 includes warning output means, radio signal receiving means, and reading means capable of reading the unique information recorded in the guidepost. Based on the unique information read by the reading means, an operator's position on the map is recognized, and based on a train operation information signal received by the radio signal receiving means, it is determined that the train 11 is approaching on the rail track in the neighborhood of the position of the portable terminal 30, and a warning is issued.

Description

  The present invention relates to a train approach warning system that gives a train approach warning to a worker who performs maintenance work or the like on a railroad track, and a technology that is effective for use in a portable terminal used therefor.

  When performing work such as railroad track maintenance during train operating hours, work is performed in the railroad track or close to the railroad track when a train approaches to prevent contact accidents. It is necessary to inform the worker of the approach of the train. In the past, a train watcher was set up at the work site to monitor the approach of the train, informing the worker that the train was approaching, and performing an evacuation operation to prevent accidental contact with the train. It was. However, since the method of setting up a train watcher is human visual monitoring, there is a possibility that notification of approaching the train may be delayed due to the watcher's forgetfulness.

  Therefore, for example, the control station provided near the boundary of each preset section of the train line, and the control station connected to the control station via the telephone line along the line, the transmitting station information is transmitted and received between the control station and received. Based on the transmission station that transmits the alarm signal wirelessly when the train approach information is detected in the transmission station information, the track circuit that is connected to the transmission station and detects the approach of the train, and the alarm signal received from the transmission station. A train approach warning system has been developed that includes a wireless receiver that issues a warning (Patent Document 1).

Also, from a train position extraction device that extracts train position information from a CTC (Central Train Control Device) that controls the train operation status, train position information from the train position extraction device, and a portable terminal having a GPS function A train approach warning device that determines whether or not a train is approaching based on the worker location information, and the train approach warning device assigns worker location information to a section that is subdivided into a single closed section. There is one in which a train approach warning is transmitted to the portable terminal of the worker when the position information of the train for the segmented section where the worker is located is within a predetermined range (Patent Document 2).
In addition, work section information such as the route and position of the work section is registered in the portable receiver in advance, and the vehicle state is determined from the position and speed of the vehicle and the route information from the in-vehicle transmission / reception device mounted on the vehicle. Information is created and this vehicle state information is transmitted to a portable receiver held by the worker, and the portable receiver determines whether or not an alarm is necessary based on the received vehicle state information and registered work section information. An invention relating to such a railway alarm generation system has also been proposed (Patent Document 3).

JP 09-104346 A Japanese Patent No. 4232015 JP 2012-210868 A

  However, in the train approach warning system disclosed in Patent Document 1, since the position of the worker is not grasped, in a section where multiple line sections are provided in parallel (multi-line section) When an approach of a train is detected in any of the line sections, an alarm signal is transmitted from the transmitting station to the wireless receiver to generate an alarm. As a result, a radio receiver owned by a worker working on a track in a different line from the line where the train is actually approaching also issues a warning. Therefore, when the above system is applied to a multi-line area with a large number of trains, such as the Tokyo metropolitan area, there is a problem that work is interrupted by frequent alarms and the work efficiency is significantly reduced.

On the other hand, in the invention of Patent Document 2, the position of a worker is grasped by the GPS function provided in the mobile terminal, and the presence or absence of a train approach is determined based on the worker position information and the train position information from the CTC (Central Train Control Device). The train approach warning is sent to the worker's mobile terminal. Therefore, there is a possibility that a train approach warning can be executed in accordance with the actual situation.
However, the invention of Patent Document 2 cannot be applied to maintenance work in a tunnel where radio waves from GPS satellites cannot be received. Moreover, with the current GPS function, the position of the worker can be grasped only within an error range of a few tens of meters. For this reason, even if the invention of Patent Document 2 is applied to a multi-line work where adjacent line sections are only a few meters apart, an alarm is issued in an undesired situation and the work is interrupted. There is a problem that it cannot be avoided.

Furthermore, since the railway alarm generation system disclosed in Patent Document 3 needs to input work section information determined in advance by a worker, a human error due to an operation error or the like may occur, Since it is limited to vehicles (such as trains or maintenance vehicles) equipped with GPS, there is a problem that accurate alarms cannot be generated when the work section is in the vicinity of a place where GPS radio waves are difficult to reach, such as a tunnel.
The present invention has been made to solve the above-described problems, and more accurately grasps the position of the worker and issues an alarm only when the train approaches on the working track or an adjacent track. An object of the present invention is to provide a train approach warning system and a portable terminal that can be used.

In order to solve the above problems, the invention according to the present application is
A plurality of train operation management devices that monitor whether or not a train exists in a predetermined section for each track that is arranged at the base of the railway line and extends in the vicinity of the base, and the plurality of train operation management devices that are extended along the track A transmission path for transmitting train operation information as a signal of the train operation management device, and a plurality of transmissions for converting an information signal installed at an arbitrary interval along the line and transmitted by the transmission path into a radio signal and transmitting it A train approach warning system comprising a device and a portable terminal capable of generating an alarm by judging whether a train is approaching by receiving a radio signal from the transmitter,
A plurality of signposts are provided along the track or work path, where the location information on the map describing the track is recorded as unique information.
The portable terminal is
An alarm output means capable of generating an alarm recognizable by an operator;
Radio signal receiving means capable of receiving a radio signal transmitted by the transmitting device;
Reading means capable of reading the unique information recorded in the signpost;
With
Recognizing the self-location of the mobile terminal on the map based on the unique information read by the reading means;
Based on the train operation information signal received by the wireless signal receiving means, train operation information related to the track near the position of the mobile terminal is extracted, and it is determined whether there is a train approaching within a predetermined distance based on the information Thus, the alarm output means is driven to generate an alarm.

The second invention according to the present application is
A plurality of train operation management devices that monitor whether or not a train exists in a predetermined section for each track that is arranged at the base of the railway line and extends in the vicinity of the base, and the plurality of train operation management devices that are extended along the track A transmission path for transmitting train operation information as a signal of the train operation management device, and a plurality of transmissions for converting an information signal installed at an arbitrary interval along the line and transmitted by the transmission path into a radio signal and transmitting it A portable terminal used in a train approach warning system comprising a device and a plurality of signposts that are installed along a track or work path and that describe position information on a map describing the track. ,
An alarm output means capable of generating an alarm recognizable by an operator;
Radio signal receiving means capable of receiving a radio signal transmitted by the transmitting device;
A reading means for reading the unique information recorded on the signpost,
With
Recognizing the self-location of the mobile terminal on the map based on the unique information read by the reading means;
Based on the train operation information signal received by the wireless signal receiving means, train operation information related to the track near the position of the mobile terminal is extracted, and based on the information, the presence / absence of a train approaching within a predetermined distance is determined. Thus, the alarm output means is driven to generate an alarm.

  According to the invention as described above, the portable terminal recognizes its own position on the map of the portable terminal based on the unique information read from the signpost (RFID tag) by the reading means, and the wireless signal receiving means receives the information. Train operation information related to the track near the position of the mobile terminal is extracted based on the train operation information signal, and an alarm can be generated by determining whether there is a train approaching within a predetermined distance based on the information. Because there is a GPS function, the self-position recognition accuracy is higher than the method of issuing a warning by recognizing the self-position and judging the approach of the train, and the work is interrupted because the warning is frequently issued in the work of the multi-line section Therefore, it is possible to avoid a reduction in work efficiency.

Preferably, the portable terminal includes a movement detection unit for detecting movement of the portable terminal, and a movement distance calculation unit that calculates a movement distance based on a signal from the movement detection unit,
Using the travel distance calculated by the travel distance calculation means, correcting the self-position recognized based on the specific information, extracting train operation information related to the track near the corrected self-position, and based on the information And determining whether there is a train approaching within a predetermined distance and driving the alarm output means to generate an alarm.
According to such a configuration, the mobile terminal corrects the self-position recognized based on the specific information using the travel distance calculated by the travel distance calculation means, determines the presence or absence of an approaching train, and issues an alarm. Therefore, accurate determination can be made even if the signpost installation interval is large, and the number of signposts installed in the line section can be reduced to suppress the total cost increase.

Desirably, a signpost serving as a reference in which position information on the map is recorded as specific information is provided at any point along the track, and the map is arranged at arbitrary intervals along the track or work path. A plurality of signposts in which relative position information from the reference signpost installation point above is recorded are provided, and the mobile terminal can calibrate its own position based on the information recorded in the plurality of signposts Configure.
According to such a configuration, the mobile terminal can correct the recognized self-position by simply installing a signpost that records relative position information from the reference point along the track or work path. The amount of information recorded on the signpost can be reduced and the cost increase can be suppressed.

Further preferably, the movement detection means is an acceleration sensor for detecting acceleration, and is configured to include at least a first acceleration sensor and a second acceleration sensor that respectively detect acceleration in two orthogonal axes in a horizontal plane. By using an acceleration sensor as the movement detection means, the movement amount can be easily calculated by merely integrating the signal from the sensor twice.
Preferably, the signpost is composed of a passive RF tag, and the reading means is an RF tag reader that reads information by applying a radio wave or a magnetic field to the RF tag.
By adopting such a configuration, the battery on the tag side can be dispensed with, thereby making maintenance unnecessary and suppressing an increase in total cost.

  According to the present invention, it is possible to realize a train approach warning system and a portable terminal capable of more accurately grasping the position of a worker and issuing a warning only when a train approaches on a working track or an adjacent track. There is an effect that can be.

It is a schematic structure figure showing one embodiment of a train approach warning system concerning the present invention. It is a block diagram which shows schematic structure of the portable terminal used for the train approach warning system of embodiment. It is a figure which shows the structural example in the case of applying the train approach warning system of embodiment to the maintenance work in a multitrack area. It is a flowchart which shows an example of the procedure of the terminal position recognition process performed by CPU of the portable terminal which comprises the train approach warning system of embodiment. It is a flowchart which shows an example of the procedure of the train approach warning process performed by CPU of a portable terminal. It is a block diagram which shows the other structural example of the portable terminal used for the train approach warning system of embodiment.

Hereinafter, an embodiment of a train approach warning system according to the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic configuration of a train approach warning system of the present embodiment. As shown in FIG. 1, in the train approach warning system of the present embodiment, a transmission path 20 is disposed along the railway line 10 for transmitting information on the position of a train 11 traveling on the line 10. The transmission line 20 is connected to a transmission device 21 that wirelessly transmits information sent via the transmission line 20 at a predetermined distance (for example, 500 m) to the portable terminal 30 held by the worker. ing.

  As a method of wireless communication from the transmission device 21 to the portable terminal 30, for example, a wireless LAN such as WiFi according to the IEEE 802.11 standard, IEEE. For example, mid-range wireless communication according to the 802.15.4 standard (ZigBee communication standard) can be applied. The interval at which the transmission device 21 is arranged is not limited to 500 m, and may be a longer distance depending on the capability of the transmission device. The following distance may be used.

  Moreover, in the train approach warning system of this embodiment, control of points and traffic lights is automatically performed based on the operation schedule, and the position of the train near the station is grasped based on the signal from the track circuit. ATOS station apparatus 40 constituting an autonomous decentralized train operation management system (ATOS) for managing operation information, and on-line position information of a train connected to the ATOS station apparatus 40 and received from the ATOS station apparatus 40, etc. A train approach warning control device (hereinafter referred to as a line guard station device) 41 having a function of transmitting to a station is provided for each station as a base along the route. In addition, since the track circuit can detect whether or not a train exists on a track having a length of several hundred meters, if the boundary of the range of the train approach alarm is 1 km, it is based on a signal from the track circuit. A system that detects the approach of a train and generates an alarm can be constructed.

Furthermore, each police station device 41 is connected to other police station devices and an ATOS central device (not shown) via the optical communication network 42 so as to be able to perform data communication. It is configured to have a function of grasping the train position (including line-by-line) in the vicinity (other line section). In the present embodiment, the range of the line monitored by one track circuit is referred to as a line section. Information may be shared via the Internet instead of the optical communication network 42.
On the other hand, as will be described in detail later, the portable terminal 30 owned by the worker has a function of recognizing its own position, a function of receiving information transmitted wirelessly from the transmission device 21, and a function of receiving the information from the received information. Based on the position information, a function for extracting the current position information of the train on the track near the point where the worker is present, and whether or not the train is approaching within a predetermined distance (for example, 1 km) based on the extracted information Has the function of calibrating self-position information.
Examples of information to be transmitted wirelessly from the transmission device 21 include a code indicating a line section where a train is approaching, a code indicating which station is between which stations, and an identification indicating a track circuit from which position information has been acquired. A code, a serial number (transmission ID), an error correction code, and the like are conceivable. In the case of a single track section, a code indicating whether the traveling direction of the train is an upward direction or a downward direction may be included.

FIG. 2 shows a schematic configuration of the mobile terminal 30 used in the train approach warning system of the present embodiment.
As shown in FIG. 2, the mobile terminal 30 in the present embodiment includes a receiving circuit 31 that has a mid-range wireless communication function such as WiFi and ZigBee communication, and receives information transmitted wirelessly from a transmitting device 21. An external information reading circuit (tag reader) 32 for reading the information recorded in the external RFID tag 50 by driving the antenna 32a, a display unit 33 including an LCD (liquid crystal panel), and an input operation unit including a touch panel 34 and a speaker 35 for generating sound. The RFID tag 50 used in this embodiment is a passive RF tag. By using a passive type RF tag, it is possible to eliminate the need for a battery, thereby making maintenance unnecessary and suppressing an increase in total cost.

In addition, the portable terminal 30 includes a CPU (microprocessor) 36 that controls internal circuits, processes information received by the receiving circuit 31, information read from the RFID tag 50 by the external information reading circuit 32, and data ROM (read only memory) 37 capable of storing data in a nonvolatile manner and RAM (random access memory) 38 capable of temporarily storing data.
Furthermore, the mobile terminal 30 in the present embodiment detects the acceleration in the two orthogonal axes (X, Y axes) in the horizontal plane and the first acceleration sensor 39A and the first acceleration sensor in order to detect the movement of the terminal and its direction. A two-acceleration sensor 39B and a third acceleration sensor 39C that detects acceleration in the vertical direction (Z-axis) are provided.

As a communication method between the portable terminal 30 and the RFID tag 50, for example, a FeliCa (registered trademark) method using a 13.56 MHz band signal can be used. In addition to the operation program executed by the CPU 36, the ROM 37 stores map information describing the track, and the operation program calculates a movement distance based on input signals from the acceleration sensors 39A to 39C. A distance calculation routine is included.
There are many types of acceleration sensors, which are roughly classified according to the detection method of acceleration. In general, an acceleration sensor having a measurement range of about 20 G or less is called a low G acceleration sensor, and a sensor having a measurement range of more than 20 G is called a high G acceleration sensor. The low G acceleration sensor is suitable for detecting gravity / tilt and human movement, and the high G acceleration sensor is mainly used for detecting an impact. Therefore, in this embodiment, a low G acceleration sensor is used.

  The acceleration generated during the movement of the terminal device becomes the speed by integrating once in time, and becomes the moving distance by integrating once more. The movement distance can be calculated by installing this acceleration sensor in three axis directions and integrating the output twice in time. However, there is a possibility that an error of several percent occurs in the calculated value of the movement distance using the acceleration sensor. Therefore, in the train approach warning system of the present embodiment, the portable terminal 30 has a function of calibrating the position information of the terminal itself, and the RFID tag 50 is disposed along the track to support the function. did.

  Further, in the system of the present embodiment, the RFID tag 50 is provided with a reference tag 50A at the entrance of the track (eg, the entrance / exit from the track maintenance worker station to the track site) as shown in FIG. Position calibration tags 50B are installed at predetermined intervals (for example, at intervals of 10 m) along the track from the reference tag. In some cases, a maintenance passage for the worker to move in advance is provided in the line section. In this case, the position calibration tags 50B are installed at predetermined intervals along the maintenance passage. Anyway. In the RFID tag 50A serving as a reference, position information (for example, latitude and longitude) on the map where the tag is installed is recorded. The information recorded in the position calibration tag 50B may be position information on a map of a point where the tag is installed, or may be relative position information from the reference tag 50A.

Next, the utilization method of the train approach warning system of this embodiment is demonstrated.
When the worker goes to the work site, he carries the portable terminal 30 having the above function and touches the reference RFID tag 50A installed at the entrance of the track. Then, the position information recorded on the reference RFID tag 50A by the portable terminal 30 is stored as the starting point position information. Subsequently, the worker moves toward the work site. During the movement, the calculation of the moving distance (including the moving direction) is executed every moment in the portable terminal 30 based on the signal from the acceleration sensor. The current position information is updated.

In addition, since the RFID tag 50B for calibration is provided along the track or along the maintenance passage, the worker calibrates the portable terminal 30 each time the worker comes to the point where the RFID tag 50B for calibration is installed. Over the RFID tag 50B. Then, the information recorded in the RFID tag 50B for calibration is read by the portable terminal 30, and the position information is calibrated based on the read information. Thereby, the error of the calculated value of the movement distance based on the signal from the acceleration sensor is corrected.
And when it comes to the work site (including moving), the portable terminal 30 has workers from the position information of the train transmitted from the guard station device 41 via the transmission device 21 along the track. When it is determined that there is a train approaching within a predetermined distance (for example, 1 km) by extracting position information of a train traveling on the track at the position and on both sides of the track (for example, a line within an adjacent line ± 1 line). An alarm will be generated.

  Next, a procedure of processing executed by the CPU 36 in the mobile terminal 30 that realizes the above functions will be described. Note that the CPU 36 in the portable terminal 30 executes various processes. Here, the terminal position recognition process and the train approach warning process that are important for the present invention will be described. Separately from these processes, the mobile terminal 30 performs a process of constantly receiving train location information transmitted from the transmission device 21 along the track and storing it in the RAM 38 by the receiving circuit 31.

FIG. 4 shows an example of a procedure of terminal position recognition processing executed by the CPU 36 of the mobile terminal 30. FIG. 5 shows an example of the procedure of the train approach warning process.
Among these, the terminal position recognition process can be executed at a predetermined cycle by a timer interrupt, and the train approach warning process can be repeatedly executed by a loop process.

  When the terminal position recognition process in FIG. 4 is started, the CPU 36 first drives the external information reading circuit (tag reader) 32 (step S1). Then, it is determined whether or not there is a response from the RFID tag (step S2). When there is no response from the RFID tag, the process is terminated, and when there is a response from the RFID tag, the RFID tag is determined as a reference. It is determined whether or not the RFID tag 50A becomes (step S3).

  Here, if it is determined that the reference RFID tag 50A is (Yes), the process proceeds to step S4, the position information recorded from the reference RFID tag 50A is read, and the read position information is stored in the RAM 38 as the position information of the portable terminal. (Step S6). On the other hand, if it is determined in step S3 that the response tag is not the reference RFID tag 50A (No: calibration tag), the process proceeds to step S5, where information recorded from the calibration RFID tag 50B is read and based on the information. The position information of the portable terminal is calibrated and the calibrated position information is stored in the RAM 38 (step S6).

  Then, it progresses to step S7, the signal from acceleration sensor 39A-39C is read, and movement distance (a direction is included) is calculated by performing integration twice (step S8). Then, by adding the calculated movement distance to the position information stored in the RAM in step S6, the current position of the mobile terminal is determined (step S9), the new position information is stored in the RAM 38, and the process is terminated. (Step S10).

  When the train approach warning process of FIG. 5 is started, the CPU 36 first determines whether or not to monitor the approach of the train (step S11). This determination can be made, for example, by determining whether or not position information has been read from the reference tag. And if it determines with monitoring the approach of a train (Yes), it will progress to step S12 and will read the track map stored in ROM37. (Step S11). Next, the position information of the portable terminal is read from the RAM 38 (step S13), and the current position of the portable terminal on the track map is recognized (step S14). Thereafter, a track near the current position of the terminal is detected based on the track map information, and the track is stored in the RAM 38 (step S15).

  Thereafter, the train location information on the track detected in step S15 is extracted from the train location information received from the transmission device 21 along the track and stored in the RAM 38 (step S16). Then, it is determined whether or not a train exists within a predetermined distance (for example, 1 km) from the current position on the track (step S17). If it is determined that there is a train (Yes), the process proceeds to step S18, the speaker 35 is driven to generate an alarm, and then the process returns to step S13 to repeat the above process.

On the other hand, if it is determined in step S17 that there is no train within the predetermined distance (No), the process proceeds to step S19, and the alarm is not generated by the speaker 35, and the process returns to step S13.
By executing the process as described above, while avoiding an alarm when there is no safety problem such as a train approaching on a track away from the position where the worker is, the track near the worker is avoided. When the train approaches, an alarm is generated to ensure the safety of workers.
Although not shown in the flowchart of FIG. 5, the alarm generated in step S <b> 18 is determined at the time when it is determined that the train has passed the position where the worker is present based on the train location information acquired thereafter. It can be configured to stop immediately on condition that another train does not come within a predetermined distance.

  Although the invention made by the present inventor has been specifically described based on the embodiment, the present invention is not limited to the embodiment. For example, in the above-described embodiment, the description has been given of the configuration in which the three acceleration sensors 39A to 39C in the three-axis directions of the X axis, the Y axis, and the Z axis are provided in the mobile terminal 30. , Only two acceleration sensors 39A and 39B in the biaxial direction of the Y axis may be provided.

  In addition, in order to increase the accuracy of the movement distance calculation, as shown in FIG. 6, angular velocity sensors 60A, 60B, and 60C that measure the posture of the terminal device during movement are installed in three axial directions. The angular velocity output from these angular velocity sensors is integrated once in time to calculate the posture angle (tilt), and the signal from the acceleration sensor is converted to horizontal and vertical components based on this posture angle. Thus, the movement distance may be calculated with higher accuracy. Further, the moving distance may be calculated by combining an acceleration sensor and a gyro sensor.

  In the above embodiment, the system provided with the RFID tag for providing the position information along the track entrance, along the track or along the maintenance path has been described. However, instead of the RFID tag, a bar code or QR code (registered trademark) is provided. A panel or the like with a two-dimensional code represented by the above may be installed, and the mobile terminal 30 may be configured to be equipped with a barcode reader or a camera function.

  Further, in the above embodiment, an alarm is generated when the train simply approaches within a predetermined distance (1 km), but the control information of the traffic lights is included in the train operation information transmitted from the ATOS station device. Since it is included, it may be determined on the mobile terminal side whether the train approaches within a predetermined distance and the traffic light on the line is a green signal, and an alarm may be generated when the signal is a green signal. If it can be judged from the train operation information transmitted from the ATOS station device that a train approaching within a predetermined distance (1 km) turns back to the work point, no alarm is generated for such a train. It is also possible to do so. Moreover, the sound (frequency) generated according to the approach distance of the train may be changed, or the generated sound detected between the track where the worker is present and the adjacent track may be changed.

Furthermore, in the above-described embodiment, the description has been given of the case where the mobile terminal 30 is provided with an acceleration sensor for calculating the movement distance. However, the acceleration sensor is omitted, and a relatively short distance is set in the multi-line section. A large number of RFID tags are two-dimensionally installed, and the position information of the RFID tag installed closest to the start of work is read by the portable terminal 30 to recognize its own position. It is also possible.
Moreover, in the said embodiment, although the system which grasped | ascertained the position of a train based on the signal from the track circuit arrange | positioned in bases, such as a station, was demonstrated, a GSP apparatus and a radio | wireless communication apparatus were added to the train. The present invention is also applied to a system in which the ATOS station device 40 or the guard station device 41 is provided with a communication function capable of communicating with a radio communication device of a train, and the position of the train is grasped using a GPS function. Can be applied.

DESCRIPTION OF SYMBOLS 10 Track 11 Train 20 Transmission path 21 Transmission apparatus 30 Portable terminal 31 Reception circuit 32 External information reading circuit (tag reader)
33 Display unit 34 Input operation unit 35 Speaker 39A, 39B, 39C Acceleration sensor 40 ATOS station device (train operation management device)
41 Train approach warning control device (line guard station device)
50 RFID tags

Claims (7)

A plurality of train operation management devices that monitor whether or not a train exists in a predetermined section for each track that is arranged at the base of the railway line and extends in the vicinity of the base, and the plurality of train operation management devices that are extended along the track A transmission path for transmitting train operation information as a signal of the train operation management device, and a plurality of transmissions for converting an information signal installed at an arbitrary interval along the line and transmitted by the transmission path into a radio signal and transmitting it A train approach warning system comprising a device and a portable terminal capable of generating an alarm by judging whether a train is approaching by receiving a radio signal from the transmitter,
A plurality of signposts are provided along the track or work path, where the location information on the map describing the track is recorded as unique information.
The portable terminal is
An alarm output means capable of generating an alarm recognizable by an operator;
Radio signal receiving means capable of receiving a radio signal transmitted by the transmitting device;
Reading means capable of reading the unique information recorded in the signpost;
With
Recognizing the self-location of the mobile terminal on the map based on the unique information read by the reading means;
Based on the train operation information signal received by the wireless signal receiving means, train operation information related to the track near the position of the mobile terminal is extracted, and it is determined whether there is a train approaching within a predetermined distance based on the information A train approach warning system characterized in that the warning output means is driven to generate a warning. The portable terminal is
Movement detection means for detecting movement of the mobile terminal;
A movement distance calculation means for calculating a movement distance based on a signal from the movement detection means,
Using the travel distance calculated by the travel distance calculation means, correcting the self-position recognized based on the specific information, extracting train operation information related to the track near the corrected self-position, and based on the information The train approach warning system according to claim 1, wherein the train approach warning system is configured to determine whether there is a train approaching within a predetermined distance and to drive a warning output means to generate a warning. A reference signpost in which position information on the map is recorded as unique information at any point along the track is provided, and at any interval along the track or work path, the reference on the map There are multiple signposts that record relative position information from the signpost installation point.
The train approach warning system according to claim 2, wherein the mobile terminal is configured to be able to calibrate its own position based on information recorded in the plurality of signposts. A plurality of train operation management devices that monitor whether or not a train exists in a predetermined section for each track that is arranged at the base of the railway line and extends in the vicinity of the base, and the plurality of train operation management devices that are extended along the track A transmission path for transmitting train operation information as a signal of the train operation management device, and a plurality of transmissions for converting an information signal installed at an arbitrary interval along the line and transmitted by the transmission path into a radio signal and transmitting it A portable terminal used in a train approach warning system comprising a device and a plurality of signposts that are installed along a track or work path and that describe position information on a map describing the track. ,
An alarm output means capable of generating an alarm recognizable by an operator;
Radio signal receiving means capable of receiving a radio signal transmitted by the transmitting device;
A reading means for reading the unique information recorded on the signpost,
With
Recognizing the self-location of the mobile terminal on the map based on the unique information read by the reading means;
Based on the train operation information signal received by the wireless signal receiving means, train operation information related to the track near the position of the mobile terminal is extracted, and it is determined whether there is a train approaching within a predetermined distance based on the information The portable terminal is configured to be able to generate an alarm by driving the alarm output means. Movement detection means for detecting movement of the mobile terminal;
A movement distance calculation means for calculating a movement distance based on a signal from the movement detection means,
Using the travel distance calculated by the travel distance calculation means, correcting the self-position recognized based on the specific information, extracting train operation information related to the track near the corrected self-position, and based on the information 5. The mobile terminal according to claim 4, wherein the mobile terminal is configured to be capable of generating an alarm by determining the presence or absence of a train approaching within a predetermined distance and driving an alarm output means.   The said movement detection means is an acceleration sensor which detects an acceleration, It is provided with the 1st acceleration sensor and the 2nd acceleration sensor which respectively detect the acceleration of the orthogonal two-axis direction in a horizontal plane at least. Mobile devices.   The mobile terminal according to claim 6, wherein the signpost is a passive RF tag, and the reading unit is an RF tag reader that reads information by applying a radio wave or a magnetic field to the RF tag.

Images