KR20020078442A - Apparatus and method for tracking position of rail car using dgps and railway data - Google Patents

Abstract

PURPOSE: An apparatus for a tracking train position by using DGPS information and railway information and method for the same are provided to more accurately track a train serviced on a railway by using a DGPS information and a railway information, to allow the train to be monitored and indicate more accurate work in response to this, thereby more efficiently managing the train. CONSTITUTION: An apparatus for tracking a train position by using a DGPS information and a railway information includes a mobile mounting system(300) mounted on each train for receiving GPS data from at least three satellites, an orbit circuit state detection part for detecting a train occupation position, a train status and a flag status of the orbit circuit, a base station system(400) for receiving a radio signal from the mobile mounting system(300), a mobile control system(100) for determining a current position on the railway for the corresponding train by selecting the position on the railway corresponding to a compensated absolute position from a preset database and a base station system(500) for transferring the compensated absolute position to the mobile control system(100) after the absolute position from the mobile control system(100) is corrected by the compensated data in response to the control of the mobile control system(100). The mobile mounting system(300) transfers identification numbers of the mounted trains together with the absolute positions of the trains in radio signal by calculating the absolute position of the corresponding train by using the position contained in the received GPS data, a time information and a geometrical trigonometry.

Description

Railway vehicle location tracking device and method using Digi PS information and railway track information {APPARATUS AND METHOD FOR TRACKING POSITION OF RAIL CAR USING DGPS AND RAILWAY DATA}

The present invention relates to a railway vehicle location tracking device and method, and more particularly, to track the position of the railway vehicle running on the railroad tracks more precisely by using digital GPS (DGPS) information and railway track information, The present invention relates to a railway vehicle location tracking device and method using digital GPS information and railroad track information that enable accurate monitoring of a condition and thus instruct accurate work. .

In general, steelworks-related railway vehicles are operated by 27 locomotives and 107 TLCs, and the main task is to transport the chartered ships from the blast furnace to steelmaking. The rail transport system aims to shorten the transportation time and improve the efficiency of the vehicle operation by efficient locomotive dispatch planning and career setting.

In addition to the purpose of providing accurate vehicle information to the workers to help transport management, the vehicle position tracking function of the railway transportation system supports the main functions of the railway transportation system and plays an important role in transmitting operation performance information to the production control computer. The vehicle location information in the railway transportation system is complemented with the vehicle location tracking using the vehicle number detecting device (AVI) and the railway track information.

Existing methods for tracking the location of railroad cars are complemented with the AVI and track circuit information. However, due to the railway operating conditions and the characteristics of the vehicle number detector, accurate location information cannot be received, resulting in the failure of vehicle location tracking. In addition, the vehicle location tracking method using the GPS receiver has been developed and used a variety of methods and devices, but due to the propagation characteristics of the GPS there is a disadvantage that can not be used in the place where the exact position is required because the error is large.

1 is a configuration and information flow chart of a conventional railway vehicle number detecting apparatus. Referring to FIG. 1, a conventional vehicle number detecting apparatus includes an outdoor facility and an indoor facility, and an external facility is an antenna installed between a track and a track. (2), an Excel counter (3) for calculating the number of wheels, a transponder (1) attached to the locomotive, and a reader (4) for collecting information, and the indoor equipment is collected by the reader (4). Data collection device 6 for collecting information by channel (six channels) by periodic polling, modem device 5 for communication with data collection device, and changing the collected data in the form of vehicle number It consists of a process computer 7 and a railroad operation MMI 8 which displays the vehicle number.

In the conventional vehicle number detecting apparatus, the method of detecting the used railway vehicle number, direction of travel, axle quantity, etc. will be described. The vehicle number is provided with the transponder 1 installed on all vehicles (locomotives, TLCs) of the railway. When the vehicle on which (1) is installed passes through the designated track and the antenna (2) installed between the tracks, magnetic flux is formed in the antenna (2) using the power supplied from the reader (4), and the When the fender 1 passes, the reader 4 detects the unique number of the transponder 1. Such detected data is provided to the railway process computer 7 via the modem 5 and the Excel counter 3, and the data thus provided is collected at the process computer 7 and operated by the network device 9 through the railway device 9. It is displayed on the screen 8 in the form of a vehicle number.

However, such a conventional railway vehicle position tracking and device does not detect the vehicle number when the vehicle is located near the sensor according to the installation conditions, operation patterns, failures, etc., and errors in the direction of travel when the vehicle moves forward and backward. In addition, there was a problem that a detection error of a type such as a data error occurrence and a vehicle sequence detection error occurred according to a communication cable noise occurrence.

In addition, since the installation position of the vehicle number detecting device is installed around the track, there is a difficulty in maintenance, and it is composed of a fixing device and a moving device, and thus there is a disadvantage in that there is no facility expandability.

FIG. 2 is a diagram illustrating a configuration and a problem when GPS is applied to a conventional railroad car number detecting apparatus. Referring to FIG. 2, a GPS is composed of a P code and a C / A code. The P code is encrypted for security reasons and can only be used by authorized users from the US Department of Defense. Although the C / A code is an open standard positioning, it contains an S / A (Selective / Availability) error that deliberately degrades the position accuracy.However, since 1 May 2000, the GPS receiver that can be used by the general user has an S / A error. Is not included. However, even if the C / A code receiver without S / A error is transmitted to the process computer 1 after analyzing the data received by the GPS receiver 2 through the GPS antenna 3, the error of the moving object is about 10 to 20m. Has a position error. This is because the orbital error is the difference between the actual satellite position and the calculated satellite position, which is caused by the propagation delay (4) Ionospheric Delay (Tropospheric Delay), which occurs when radio waves from the satellite (5) pass through the earth's ionosphere and troposphere. (Ephemeris Error), Satellite Clock Error, which is the difference between the actual satellite clock and the expected location and time.

However, railroad cars that operate in a wide range of areas may not receive satellite information due to jamming by factory buildings near the tracks and entry into the building.In particular, GPS characteristics may prevent satellite vehicles from entering the building or checking satellites. If the GPS receiver is located in an impossible position, there is a problem in that it is impossible to track the exact position of the vehicle due to communication loss.

In addition, due to the iron working conditions and the characteristics of the vehicle number detecting device, accurate location information cannot be received and vehicle location tracking has failed. Therefore, it is required to develop a railway vehicle location tracking system for the efficient operation of maintenance personnel as well as to reduce the accuracy of vehicle location tracking data, the vehicle number detection system, and the maintenance cost.

The present invention has been made to solve the above problems, and therefore, an object of the present invention can more accurately track the position of the railroad car running on the railroad tracks using digital GPS (DGPS) information and railroad track information. In this way, it is possible to monitor the exact condition of the railroad car, and thus, it is possible to instruct the correct operation, thereby tracking the position of the railroad car using the DGPS information and railroad track information that can efficiently manage the railroad car. An apparatus and method are provided.

It is another object of the present invention to provide a railway vehicle position tracking apparatus and method using digital GPS (DGPS) information and railway track information that can efficiently minimize maintenance costs by operating maintenance personnel.

1 is a configuration and information flow chart of a conventional railway vehicle number detection device.

2 is a diagram illustrating a configuration and a problem when GPS is applied to a conventional railway vehicle number detecting apparatus.

3 is a block diagram of a railway vehicle position tracking system according to the present invention.

4 is a configuration diagram and a data flow diagram of the railway work instruction apparatus of FIG. 3.

Figure 5 is a flow chart showing a railway vehicle position tracking method according to the present invention.

Explanation of symbols on the main parts of the drawings

100: vehicle control system 110: interface (MMI)

120: process computer 125: database

130: data input and output device GANT1: GPS antenna

200: track circuit 250: relay splitter

300: vehicle onboard system 310: GPS receiver

320: controller 330: indicator

340: Modem 350: Radio

ANT2: Antenna GANT2: GPS Antenna

400: base station system 410: base station

420: base station controller ANT1: antenna

500: reference station system 510: GPS receiver

520: reference station server GANT1: GPS antenna

600: satellite

As a technical means for achieving the object of the present invention described above, the apparatus of the present invention is mounted on each of a railroad vehicle to receive GPS data from three or more satellites, and the position and time contained in the received GPS data. A vehicle-mounted system that calculates the absolute position of the vehicle by using geometric triangulation with information and wirelessly transmits the unique identification number of the mounted vehicle together with the absolute position information of the vehicle; A track circuit state detection unit detecting a vehicle occupied position, a train state and a signal state in the track circuit; A base station system for receiving radio signals from the on-vehicle system 300; The base station system receives the signal received from the base station system, identifies the vehicle identification number included in the received signal, controls the correction of the absolute position of the identified vehicle, and advances the position on the line corresponding to the corrected absolute position. A vehicle control system for determining a current position on a track of the vehicle by searching from a database provided in the database; Receive GPS data from a preset reference satellite to set the absolute position correction data, and in response to the control of the vehicle control system, correct the absolute position from the vehicle control system using the correction data and then correct the absolute position. And a reference station system for transmitting an absolute position to the vehicle control system.

In addition, as another technical means for achieving the object of the present invention, the method of the present invention, the vehicle control system wirelessly communicates the work-related information including the work order and position data with the on-vehicle system via the base station system, In this vehicle control system, the absolute position of the railway vehicle from the on-vehicle system is tracked using the railway vehicle occupied position from the track circuit state detection unit and the correction data from the reference station system to track the current position on the track of the railway vehicle. In the step (a) by detecting the occupied position on the railroad track, the state of the season and the signal state for the railway vehicle to determine whether the railway vehicle is running; (b) calculating the absolute position of the corresponding railway vehicle using geometric trigonometry with position and time information from three or more satellites in the on-vehicle system; (c) receiving position and time information from a preset reference satellite and setting correction data of an absolute position using the received position and time information; (d) if it is determined that the vehicle is in the operating state in step (a), starting the position tracking of the corresponding railway vehicle and correcting the absolute position of the step (b) using the correction data in the step (c); (e) finding a position on the track corresponding to the absolute position corrected in step (d) from a database prepared in advance and determining the current position of the corresponding railway vehicle; Characterized in having a.

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, a railroad vehicle position tracking apparatus using digital GPS information and railroad track information will be described in detail with reference to the accompanying drawings. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

The present invention maximizes the transport efficiency by monitoring the location in real time when the operation of the railway car in the yard responsible for the transport of the blast furnace between the steelworks blast furnace plant and steel mills, and solves the problems caused by the existing device, in particular the vehicle number detection device Invented a method of tracking the location of a vehicle by using a method other than the existing devices and methods for the location of railroad vehicles for the purpose of introducing and reducing maintenance costs and efficient operation of maintenance personnel.

3 is a configuration diagram of a railway vehicle position tracking system according to the present invention, and FIG. 4 is a configuration diagram and a data flow diagram of the railway work instruction apparatus of FIG. 3.

3 and 4, the railroad vehicle location tracking system according to the present invention is mounted on each railroad car, and receives GPS data from three or more satellites, and the location and time information included in the received GPS data. And an on-vehicle system 300 for calculating the absolute position of the vehicle by using a geometric trigonometric method and wirelessly transmitting the unique identification number of the mounted vehicle together with the absolute position information of the vehicle, and the vehicle occupied position in the track circuit. A track circuit state detection unit detecting a train state and a signal state, a base station system 400 receiving a radio signal from the on-vehicle system 300, and a signal received from the base station system 400; Check the vehicle identification number included in the received signal, control the correction of the absolute position of the identified vehicle, and The vehicle control system 100 determines the current position on the track for the corresponding vehicle by finding the position on the track in advance in the database, and sets the correction data of the absolute position by receiving GPS data from a preset reference satellite. In response to the control of the vehicle control system 100, correcting the absolute position from the vehicle control system 100 using the correction data, and transmitting the corrected absolute position to the vehicle control system 100. A reference station system 500 is provided.

The vehicle-mounted system 300 is a system for detecting the position of the mobile vehicle mounted on the mobile vehicle, respectively, which is a GPS receiver GANT2 and a GPS receiver for receiving GPS data from the satellite through the GPS antenna GANT2. And an absolute position of the mounted vehicle is calculated by applying geometric trigonometry with the position and time included in the GPS data from the GPS receiver 310, that is, the position and time information received from three or more satellites. The controller 320 controls the screen display of the calculated absolute position and controls the wireless transmission of the vehicle's unique identification number and the absolute position, and the absolute position information according to the control of the controller 320. And an indicator 330 (MDT-420) for displaying vehicle work related data on a screen, and a modem 340 (VRM 500) for modulating and demodulating data according to the control of the controller 320. And the data through the radio modem 350 for conversion to a radio signal (SPECTRA), the output signal of the transceiver 350 includes an antenna (ANT2) for transmission over the air.

The track circuit state detection unit includes a relay distribution panel that detects the occupation state of the railroad car through the track circuit connected to the track of the railroad car.

The base station system 400 is a system for transmitting and receiving a radio signal with the on-vehicle system 300, which is an antenna ANT1, through the antenna ANT1 through the antenna ANT2 of the on-board system 300 A base station 410 (Quanta DBS, QUANTAR DBS) that receives the transmitted radio signal, and a base station controller 420 (RNC-3000) receiving the received signal from the base station 410 and providing the received signal to the vehicle control system (). ).

The base station system 400 also performs a radio transmission and reception operation between the radio 350 and the antenna ANT2 of the on-vehicle system 300. Through the radio transmission and reception operation described above, Railroad car dispatch plans generated based on information gathered at the site, such as location, are used to wirelessly instruct work on railroad cars.

The vehicle control system 100 is a system that accurately tracks the position of each mobile vehicle in order to secure an accurate work instruction for a plurality of mobile vehicles for molten iron and raw material transportation in a steel mill, and an interface for interfacing the internal system with the driver. (MMI) (110), and separate the track position of the railroad and classify by region, specify the upper and lower limits of the X-axis and Y-axis for each region to match the corresponding absolute position for each track position and store, A database 125 that registers track names, tracks, and train names in the track, a data input / output device 130 for receiving a railroad vehicle occupying position, train state and signal state information from the track circuit state detection unit, and the base station system 400. Receives the absolute position of the vehicle from the control, controls the correction for this absolute position, The location on the track is retrieved from the database 125 to determine the current location on the track of the vehicle, and the determined location information is matched to the corresponding railway vehicle and stored according to time, and the corresponding railway based on the hourly location information of the vehicle. It includes a process computer 120 for recognizing the moving direction of the vehicle.

The database 125 matches and stores a plurality of absolute positions of railroad cars with positions on tracks corresponding to each of the absolute positions, and also stores map data of actual track data on railroad tracks. Classification, name of railway line, starting position value, end position value, index of vehicle number window on railway operation screen, adjacent railway line name, etc., and the position (coordinate) on the line is the map data of the railway line Matched and stored.

The reference station system 500 is a system for receiving the GPS data from a preset reference satellite and setting the absolute position correction data using the position and time included in the GPS data, which is a GPS antenna GANT1, Correction of the absolute position using the GPS receiver 510 for receiving GPS data from a reference satellite set in advance through the GPS antenna GANT1 and the position and time included in the GPS data received by the GPS receiver 510. The reference station server 520 may be configured to set data, correct the absolute position using the correction data according to the control of the vehicle control system 200, and transmit the data to the vehicle control system 200.

The satellite 600 uses three or more satellites to apply a geometric trigonometry.

Operation according to the device of the present invention configured as described above will be described in detail below based on the accompanying drawings.

Referring to the operation of the railway vehicle position tracking device according to the present invention with reference to Figures 3 to 5, first, in step (a) (a) the occupied position on the railway line for the railway vehicle, the state of the season and the signal Detecting the state to determine whether the railway vehicle is running (S510-S530), which will be described in more detail, the track circuit state detection unit detects a vehicle occupied position, a train state and a signal state in the track circuit, and detects the state. The signal is transmitted to the process computer 120 of the vehicle control system 100 through the data input / output device 130, and the process computer 120 transmits the data to the map data of the actual measurement of the track of the railway vehicle stored in the database 125. On the basis of this, the received detection signal is analyzed to determine the railway line occupation position, the state of the train, the signal state, and the like, and then the designated railway in the state where the departure line is occupied. When the amount of the track start location is occupied discloses a rail car location.

Next, in step (b), the vehicle-mounted system 300 calculates the absolute position of the corresponding railway vehicle using geometric triangulation with position and time information from three or more satellites (S561). In detail, the GPS receiver 310 of the on-vehicle system 300 mounted on each railway vehicle receives the GPS data through the GPS antenna GANT2, and the received GPS data is provided to the controller 320. In this case, the controller 320 measures the arrival time of radio waves received from three or more GPS satellites through the GPS receiver 310, calculates the distance between the GPS receiver 310 and the satellites, and then uses the geometric triangulation method to receive the receiver. Calculate the position of, ie the absolute position of the railway car.

The chemical trigonometry is a spatial coordinate system in which one unknown position, that is, the position (x, y, z) of a moving vehicle, has three different known positions, that is, three satellites (x1, y1, z1) (x2). Knowing the distance from (y2, z2) (x3, y3, z3), this arbitrary formula (x, y, z) can be calculated, and in the present invention, the position and time information from three satellites Therefore, considering the arrival time of the satellite signal, the distance from the satellite can be known. This is known geometric trigonometry, the detailed description thereof will be omitted.

The absolute position calculated as described above is modulated by the mobile station modem 340 of the RS-232C protocol together with the unique identification number of the mounted vehicle, and is converted into a radio signal by the radio 350 and the base station system 400 through the antenna ANT2. ), And the base station system 400 receives a radio signal from the on-vehicle system 300 and transmits the radio signal to the vehicle control system 100.

On the other hand, in step (c), the reference station system 400 receives the position and time information from a preset reference satellite, and sets the correction data of the absolute position using the received position and time information. Briefly described in the correction data for the absolute position, as described above, the GPS is composed of a P code and a C / A code, which is a published standard positioning, there is no S / A error Even when receiving the C / A code and analyzing the absolute position using this code, the absolute position with respect to the moving object has a position error of about 10-20 m. In order to correct the error of the measured absolute position, correction data as described above are set in advance.

Next, in step (d), if it is determined that the vehicle is operating in step (a), the position tracking of the corresponding railway vehicle is started, and the absolute position of step (b) is used by using the correction data in step (c). To correct (S562), in more detail about this, the vehicle control system 100 checks the railway unique identification number included in the signal received through the base station system 400, and to the confirmed railway vehicle When the correction is controlled in the reference station system 500 with respect to the absolute position, the reference station system 500 corrects the absolute position using a preset correction data, and the corrected absolute position is again used in the vehicle. Provided to the control system 100.

Next, in step (e), the position on the track corresponding to the absolute position corrected in step (d) is searched in a database prepared in advance to determine the current position of the corresponding railway vehicle (S563). In this case, the absolute position of the vehicle must be converted to the position on the track for the vehicle position and the work instruction using the absolute position of the railway vehicle currently in progress. To this end, the process of the vehicle control system 100 The computer 120 retrieves a location on the railroad track corresponding to the absolute location from the database 125 and recognizes the current location of the corresponding railroad vehicle.

Accordingly, referring to the map data of the railway tracks, which are matched with the position (coordinates) for the railway vehicle and stored in the database 125, the current position on the railway tracks can be tracked, as well as the position. It is possible to make the railway track condition more accurate.

In addition, the process computer 120 of the vehicle control system 100 stores the position on the railroad track corresponding to the absolute position by time for the railway vehicle, which can recognize the direction of movement of the vehicle due to the position by time. Will be.

In addition, when the GPS receiver is in a position where the satellite cannot be identified, the railroad car tracks the location of the railroad car by using the front and rear state information and the train state information registered in the database.

As described above, according to the present invention, it is possible to track the exact position of the mobile railway vehicle, and based on the position of the accurate railway vehicle, more accurate monitoring is possible, and accurate work orders are possible. In step S560 of FIG. 5, the track circuit name, railway line coordinate value, operation screen vehicle number display window, and mobile station number of the database constructed in the reference station are read based on the data received from the GPS receiver. If the vehicle registered in the base is occupied by the destination railway line to go to (S570), the state of the track where the vehicle was first located is analyzed. If the analyzed information is in the occupied state of the track, it is regarded as a vehicle separation (S581). If the occupied state is not occupied, all the vehicles (S590) are regarded as being moved, and all vehicles are displayed in the designated vehicle number window of the railway work screen. When the separation of the vehicle occurs, the railway work instruction S582 is checked and only the vehicle on which the work is carried out (S583) is displayed on the vehicle number window S584 of the railway work screen.

According to the present invention described above, since the error range of the position tracking is estimated to be 1 to 1.5M, it is possible to accurately track the railroad vehicle moving on the track, and such a position is accurate detection of the railroad car and more accurate and smooth. Work order is applied.

According to the present invention as described above, since the existing vehicle number detection device is installed between the field track and the track, the scope of the maintenance and maintenance of the maintenance equipment of the operator is so wide that there is a considerable difficulty in the management of the facility and civil engineering during relocation and replacement As the construction and cable laying work were needed, the maintenance cost was too high. Therefore, the present invention and system development utilizing the basic science principles of GPS, geographic information system, database design, wireless data communication, and railway process computer system facilities are reflected in the replacement of obsolete vehicle number detection devices. In order to solve the maintenance, economic feasibility and reliability of the railroad car number detection system,

First of all, the quantitative effects include efficient maintenance personnel operation, equipment replacement cost reduction and maintenance cost reduction.The qualitative effect is to reduce the load on the operator of railway control room by accurate vehicle location tracking, and to reduce the amount of railway vehicles Improved TLC turnover, and easy installation and relocation, can effectively cope with future facility expansion.

The above description is only a description of one embodiment of the present invention, the present invention is capable of various changes and modifications within the scope of the configuration.

Claims (5)

It is mounted on each railroad vehicle, receives GPS data from three or more satellites, calculates the absolute position of the vehicle by using geometric trigonometry with the position and time information included in the received GPS data, A vehicle-mounted system 300 for wirelessly transmitting a unique identification number together with the absolute position information of the vehicle; A track circuit state detection unit detecting a vehicle occupied position, a train state and a signal state in the track circuit; A base station system (400) for receiving radio signals from the on-vehicle system (300); Receiving a signal received from the base station system 400 to check the vehicle identification number included in the received signal and to control the correction of the absolute position of the identified vehicle, and on the line corresponding to the corrected absolute position A vehicle control system 100 for retrieving a location from a previously prepared database and determining a current location on a track for the vehicle; Receive GPS data from a preset reference satellite to set the absolute position correction data, and in response to the control of the vehicle control system 100, the absolute position from the vehicle control system 100 is determined using the correction data. A reference station system 500 for transmitting the corrected absolute position to the vehicle control system 100 after the correction; and a railway vehicle position tracking device using digital GPS information and railway track information. . The method of claim 1, wherein the vehicle control system 100 An interface (MMI) 110 for interfacing the internal system with the driver; The railway tracks are classified by region, and the upper and lower limits of the X-axis and Y-axis are designated for each region, and the corresponding absolute positions are stored for each track position. Registered database 125; A data input / output device (130) for receiving a railway vehicle occupied position, a train state and a signal state information from the track circuit state detector; Receives the absolute position of the vehicle from the base station system 400, controls the correction for the absolute position, and finds the position on the track corresponding to the corrected absolute position in the database 125 to find the position on the track of the vehicle. A process computer 120 for determining a current position, matching the determined position information with a corresponding railway vehicle, storing the resultant position by time, and recognizing a moving direction of the corresponding railway vehicle based on time-specific positional information of the vehicle; Positioning device for railroad vehicles using Digi-PS (DGPS) information and railroad track information, including that. The vehicle control system 100 of claim 2, wherein Digit PS (DGPS) information, characterized in that for recognizing a unique identification number for the vehicle of the occupied position in the same case by comparing the determined position of the railway vehicle and the railway vehicle occupied position from the track circuit state detection unit; Railroad vehicle location tracking device using railroad track information. The vehicle control system 100 wirelessly communicates work-related information including work orders and position data with the vehicle-mounted system 300 through the base station system 400, and the vehicle control system 100 transmits the vehicle-mounted system ( In the method of tracking the current position on the track of the railway vehicle by using the railway vehicle occupied position from the track circuit state detection unit and the correction data from the reference station system 500, the absolute position of the railway vehicle from 300), (a) determining whether the railroad vehicle is in operation by detecting a position occupied on the railroad track, a season-of-season state and a signal state for the railroad car; (b) calculating the absolute position of the corresponding railway vehicle using geometric triangulation with position and time information from three or more satellites in the on-vehicle system 300; (c) receiving position and time information from a preset reference satellite and setting correction data of an absolute position using the received position and time information; (d) if it is determined that the vehicle is in the operating state in step (a), starting the position tracking of the corresponding railway vehicle and correcting the absolute position of the step (b) using the correction data in the step (c); (e) finding a position on the track corresponding to the absolute position corrected in step (d) from a database prepared in advance and determining the current position of the corresponding railway vehicle; Positioning method of a railroad vehicle using the Digi-PS (DGPS) information and railroad track information characterized in that it comprises a. The method of claim 4, wherein step (e) A railroad vehicle location tracking method using DGPS information and railroad track information, which stores a position on a track of a corresponding railroad vehicle by time and recognizes a moving direction of the railroad vehicle based on the hourly position.