TRAIN POSITION DETERMINATION METHOD AND SYSTEM

Abstract

 The present disclosure belongs to the field of train control, and provides a method and system for determining a train position. The method includes: obtaining train information, a number of a virtual district where a train estimation front end is located, and a distance from the train estimation front end to the virtual district; calculating a list of train-associated block section positions, and a start position and an end position of each block section based on the train information, the number of the virtual district, and the distance from the train estimation front end to the virtual district; and determining a coordinate point of a train start position and a coordinate point of a train end position based on the list of train-associated block section positions and coordinates displayed by centralized traffic control (CTC) station yard equipment. A number of trains in the block section and a positional relationship among the trains can be displayed, thereby improving high-precision display of the train position; and normalized display in a station yard map interface is implemented, making it convenient and intuitive.

Description

FIELD OF TECHNOLOGY

[0001] The present disclosure belongs to the field of train control, and particularly relates to a method and system for determining a train position.

BACKGROUND

[0002] A railway signal system is based on a track circuit for the occupation of a section track. In an automatic block district, a section is divided into several block sections, which are smallest units for checking the occupation of the section track. A centralized traffic control (CTC) system receives an occupancy status of the block section. When the block section is idle, namely, there is no train in the block section, a light blue line segment is displayed on a station yard map. When the block section is occupied, namely, there is a train in the block section, a red line segment is displayed on the station yard map. When the train operates in the section, the CTC station yard map shows that the red line segment moves, based on which train number tracking of the train and automatic control of station routes are implemented.

[0003] Under a fixed block condition, the occupancy of the block sections based on the track circuit and the positions of trains T1, T2, and T3 on the CTC station yard map are as shown in FIG. 1. In the schematic diagram, a rectangular grid represents a block section, a white rectangular grid indicates that the block section is idle and there is no train, and a black rectangular grid indicates that the block section is occupied and there is a train, in this case, the occupied train number is marked near the block section (the same below). Therefore, the occupancy status of the block section may roughly reflect the train position, but cannot accurately indicate the position and length of the train inside the block section.

[0004] Under a moving block condition, there may be a train or two trains in a block section. As shown in FIG. 2, a train T4 occupies a block section, and trains T5 and T6 jointly occupy another block section. Therefore, the occupancy status of the block section cannot indicate a number of trains inside the block section and a positional relationship among the trains. However, there are still the following technical problems at present: the number of trains in the block section and the positional relationship among the trains cannot be displayed, and the display is not precise and intuitive enough.

SUMMARY

[0005] In view of the above problems, the present disclosure proposes a method and system for determining a train position. A number of trains in a block section and a positional relationship among the trains can be displayed, thereby improving high-precision display of the train position; and normalized display in a station yard map interface is implemented, making it convenient and intuitive.

[0006] The present disclosure provides a method for determining a train position, including:

obtaining train information, a number of a virtual district where a train estimation front end is located, and a distance from the train estimation front end to the virtual district;

calculating a list of train-associated block section positions, and a start position and an end position of each block section based on the train information, the number of the virtual district, and the distance from the train estimation front end to the virtual district; and

determining a coordinate point of a train start position and a coordinate point of a train end position based on the list of train-associated block section positions and coordinates displayed by centralized traffic control (CTC) station yard equipment.

[0007] Preferably, the train information includes a train length and a train operation direction.

[0008] Preferably, the calculating a list of train-associated block section positions includes: determining a block section corresponding to the number of the virtual district where the train estimation front end is located as a current block section; and
obtaining a length of the current block section, calculating a first sum of the distance from the train estimation front end to the front virtual district and the train length, and when the first sum is greater than the length of the current block section, adding the current block section to a list of train-associated block sections.

[0009] Preferably, the method further includes: dividing the distance from the train estimation front end to the front virtual district by the length of the current block section to obtain a ratio, where the ratio is a position of a train in the current block section, and when the ratio is 1, position calculation ends.

[0010] Preferably, a first difference value between the first sum and the length of the current block section is calculated, where the first difference value is a remaining train length of the train outside the current block section.

[0011] Preferably, when the remaining train length is greater than the length of the current block section, the current block section is added to the list of train-associated block sections, the start position is 0, and the end position is 1.

[0012] Preferably, when the remaining train length is less than or equal to the length of the current block section, the current block section is added to the list of train-associated block sections, the start position is 0, and the end position is a ratio of the remaining train length to the length of the current block section.

[0013] Preferably, when the train operation direction is a forward operation direction, a rear block section of the current block section is searched for;

when the train operation direction is not the forward operation direction, a front block section of the current block section is searched for and recorded as a next block section; and

when the next block section does not exist, the current block section is reset to the next block section.

[0014] Preferably, when the train operation direction is a backward operation direction, the start position is reset by subtracting the original end position from 1, and the end position is reset by subtracting the original start position from 1.

[0015] Preferably, the current block section is added to the list of train-associated block sections, the start position is the ratio of the distance from the train estimation front end to the front virtual district to the length of the current block section, and the end position is a ratio of the first sum to the length of the current block section.

[0016] Preferably, the determining a coordinate point of a train start position and a coordinate point of a train end position based on the list of train-associated block section positions and coordinates displayed by CTC station yard equipment includes: determining whether the start position and the end position in the list of train-associated block sections are changed, and when the start position and the end position in the list of train-associated block sections are changed, calculating a length of the block section, a start offset of the train, an end offset of the train, the coordinate point of the train start position, and the coordinate point of the train end position.

[0017] Preferably, the length of the block section is a distance from a coordinate point of an initial end to a coordinate point of a final end; the length of the block section is multiplied by the train start position to obtain a train start position offset; the length of the block section is multiplied by the train end position to obtain a train end position offset;
a sum of an initial end of the block section and the train start position offset is calculated to obtain the coordinate point of the train start position; and a sum of the initial end of the block section and the train end position offset is calculated to obtain the coordinate point of the train end position.

[0018] Based on the same inventive concept, the present disclosure provides a system for determining a train position, including:

an obtaining module configured to obtain train information, a number of a virtual district where a train estimation front end is located, and a distance from the train estimation front end to the virtual district;

a calculation module configured to calculate a list of train-associated block section positions, and a start position and an end position of each block section based on the train information, the number of the virtual district, and the distance from the train estimation front end to the virtual district; and

a determination module configured to determine a coordinate point of a train start position and a coordinate point of a train end position based on the list of train-associated block section positions and coordinates displayed by CTC station yard equipment.

[0019] Based on the same inventive concept, the present disclosure further provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory communicate with one another via the communication bus;

the memory is configured to store a computer program; and

the processor is configured to, when executing the program stored on the memory, implement steps of any one of the methods for determining a train position.

[0020] Based on the same inventive concept, the present disclosure further provides a computer-readable storage medium having a computer program stored thereon, where the computer program, when executed by a processor, implements steps of any one of the methods for determining a train position.

[0021] The above one or at least one technical solution in the embodiments of the present application has at least the following technical effects:
Based on the above technical solution, the train information, the number of the virtual district where the train estimation front end is located, and the distance from the train estimation front end to the virtual district are obtained; the list of train-associated block section positions, and the start position and the end position of each block section are calculated based on the train information, the number of the virtual district, and the distance from the train estimation front end to the virtual district; and the coordinate point of the train start position and the coordinate point of the train end position are determined based on the list of train-associated block section positions and the coordinates displayed by the CTC station yard equipment. A number of trains in the block section and a positional relationship among the trains can be displayed, thereby improving high-precision display of the train position; and normalized display in a station yard map interface is implemented, making it convenient and intuitive.

[0022] Other features and advantages of the present disclosure will be described in the following specification, and will become apparent in part from the specification, or will be understood by implementing the present disclosure. The objective and other advantages of the present disclosure may be achieved and obtained through the structures indicated in the specification and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or in the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly described below. Apparently, the accompanying drawings in the description below merely illustrate some embodiments of the present disclosure. Those of ordinary skill in the art may also derive other accompanying drawings from these accompanying drawings without creative efforts.

FIG. 1 shows a schematic diagram of display of a train station yard under a fixed block condition;

FIG. 2 shows a schematic diagram of display of a train station yard under a moving block condition;

FIG. 3 shows a flowchart of a display method according to the present disclosure;

FIG. 4 shows a flowchart of a display system according to the present disclosure;

FIG. 5 shows a schematic operating diagram of part of a centralized traffic control (CTC) system in the present disclosure;

FIG. 6 shows a schematic diagram that a train is located in a block section in the present disclosure;

FIG. 7 shows a schematic diagram that a train is located in two block sections in the present disclosure; and

FIG. 8 shows a schematic diagram that two trains are located in a block section in the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0025] It should be noted that the terms "first", "second", etc. in the present application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that the data used in this way may be interchanged under appropriate circumstances, so as to facilitate the embodiments of the present application described herein. In the present application, the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "transverse", "longitudinal", etc. are based on the orientations or positional relationships shown in the accompanying drawings.

[0026] An application scenario of the present disclosure may be that in a case where a Chinese train control system level 3 (CTCS-3) or another non novel train control system is provided, train information received by a centralized traffic control (CTC) system from a radio block center (RBC) may replace the train information in the present solution and be used to calculate a train position. In a case where a radio train number check information transmission system for a train is provided, a CTC system may obtain information on a kilometer post and a calculated length from a radio train number, which, in combination with determination of a train operation direction by the CTC system, may replace the train information in the present solution and be used to calculate a train position. In a case where an automatic train operation (ATO) function of a temporary speed restriction server (TSRS) for high-speed railway is provided, a CTC system may obtain information on a train position (mileage information) from onboard status information received by the TSRS, and may obtain a type of a train formation to calculate a train length, which, in combination with determination of a train operation direction by the CTC system, may replace the train information in the present solution and be used to calculate the train position. In data of CTC station yard equipment, signals at two ends of a block section, signal boards, or kilometer posts of other equipment are used to calculate a length of the block section, which may replace the length of the block section in the present solution.

[0027] Referring to FIG. 3, a method for determining a train position includes: obtaining train information, a number of a virtual district where a train estimation front end is located, and a distance from the train estimation front end to the virtual district;

calculating a list of train-associated block section positions, and a start position and an end position of each block section based on the train information, the number of the virtual district, and the distance from the train estimation front end to the virtual district; and

determining a coordinate point of a train start position and a coordinate point of a train end position based on the list of train-associated block section positions and coordinates displayed by CTC station yard equipment.

[0028] The train information includes, but is not limited to, a train length and a train operation direction.

[0029] Specifically, according to the present disclosure, the train position, the train direction, and the train length in novel train control are displayed in a tabular form, without combination with a display status of the block section. A way is provided to determine the train position more accurately through the train information and a calculation method. The present disclosure is applied to a CTC system platform. Hardware devices involved in a system may be a desktop computer, a laptop, a tablet, and a central control display. According to the present disclosure, the train information, the number of the virtual district where the train estimation front end is located, and the distance from the train estimation front end to the virtual district are obtained mainly based on the CTC system, where the train estimation front end can be understood as a train head in a physical train, and the virtual district refers to that a train operation line is divided into a plurality of districts, and the plurality of districts are numbered separately, making it convenient for obtaining the train position.

[0030] Specifically, the calculating a list of train-associated block section positions includes: searching data of the CTC station yard equipment for a block section corresponding to the number of the virtual district where the train estimation front end is located, and determining the block section corresponding to the number of the virtual district where the train estimation front end is located as a current block section; and obtaining a length of the current block section, calculating a first sum of the distance from the train estimation front end to the front virtual district and the train length, and when the first sum is greater than the length of the current block section, adding the current block section to a list of train-associated block sections. It should be noted that the list of train-associated block section positions is used to compare the start position and the end position of each block section. The start position and the end position are converted into coordinates, to determine the train position. When there are situations where the current block section does not exist, a train does not operate in a forward or backward direction, the length of the current block section is zero, and the length of the current block section is less than the distance from the train estimation front end to the front virtual district, the calculation of the train position fails.

[0031] In some optional embodiments, the method further includes: obtaining the distance from the train estimation front end to the front virtual district and the length of the current block section; and
dividing the distance from the train estimation front end to the front virtual district by the length of the current block section to obtain a ratio, where the ratio is a position of a train in the current block section, and when the ratio is 1, position calculation ends.

[0032] In some optional embodiments, a first difference value between the first sum and the length of the current block section is calculated, where the first difference value is a remaining train length of the train outside the current block section. When the remaining train length is less than or equal to the length of the current block section, the current block section is added to the list of train-associated block sections, the start position is 0, and the end position is a ratio of the remaining train length to the length of the current block section.

[0033] When the remaining train length is greater than the length of the current block section, the current block section is added to the list of train-associated block sections, the start position is 0, and the end position is 1.

[0034] In some optional embodiments, when the train operation direction is a forward operation direction, a rear block section of the current block section is searched for;

when the train operation direction is not the forward operation direction, a front block section of the current block section is searched for and recorded as a next block section; and

when the next block section does not exist, the current block section is reset to the next block section; and if the length of the current block section is 0, it is determined that the calculation of the train position fails.

[0035] In some optional embodiments, when the train operation direction is a backward operation direction, the start position is reset by subtracting the end position from 1, and the end position is reset by subtracting the start position from 1. The remaining train length is reset to a value obtained by subtracting the length of the current block section from the original remaining train length.

[0036] In some optional embodiments, the current block section is added to the list of train-associated block sections, the start position is the ratio of the distance from the train estimation front end to the front virtual district to the length of the current block section, and the end position is a ratio of the first sum to the length of the current block section.

[0037] In some optional embodiments, the determining a coordinate point of a train start position and a coordinate point of a train end position based on the list of train-associated block section positions and coordinates displayed by CTC station yard equipment includes: determining whether the start position and the end position in the list of train-associated block sections are changed, and when the start position and the end position in the list of train-associated block sections are changed, calculating a length of the block section, a start offset of the train, an end offset of the train, the coordinate point of the train start position, and the coordinate point of the train end position.

[0038] In some optional embodiments, the length of the block section is a distance from a coordinate point of an initial end to a coordinate point of a final end; the length of the block section is multiplied by the train start position to obtain a train start position offset; the length of the block section is multiplied by the train end position to obtain a train end position offset;
a sum of an initial end of the block section and the train start position offset is calculated to obtain the coordinate point of the train start position; and a sum of the initial end of the block section and the train end position offset is calculated to obtain the coordinate point of the train end position.

[0039] The present disclosure breaks through the limitation of smallest units of block sections for checking the occupation based on a track circuit in terms of the accuracy of the train position based on the CTC system, thereby achieving the meter level train position. Train status information transmitted by an RBC system, such as the train position, the train direction, and the train length, is used to calculate and display the train position in the CTC station yard map for the first time. During the calculation and display of the train position, existing basic data of CTC, such as a connection relationship between front and rear sides of the block section, the length of the block section, and coordinates of the block section, is fully utilized. During the display of the train position, a color different from an original status is used locally in the block section to represent the train position. In the present solution, green is used to represent the position of the train in the block section.

[0040] Based on the same inventive concept, the present disclosure further provides a system for determining a train position. Referring to FIG. 4, the system includes:

an obtaining module configured to obtain train information, a number of a virtual district where a train estimation front end is located, and a distance from the train estimation front end to the virtual district;

a calculation module configured to calculate a list of train-associated block section positions, and a start position and an end position of each block section based on the train information, the number of the virtual district, and the distance from the train estimation front end to the virtual district; and

a determination module configured to determine a coordinate point of a train start position and a coordinate point of a train end position based on the list of train-associated block section positions and coordinates displayed by CTC station yard equipment.

[0041] Specifically, the coordinates displayed by the CTC station yard equipment are loaded from data, and include coordinates of an initial end and a final end of the block section; and a list of train-associated block sections is received from a management module of an RBC, and includes the start position and the end position of each block section. Reference is made to FIG. 6, in which a rectangular grid represents a block section, a white rectangular grid indicates that the block section is idle and there is no train, a black rectangular grid indicates that the block section is occupied and there is a train, and a shaded area represents the train position in novel train control. A train T7 operates forwards in a block section. A length of an operational section is greater than a train length. FIG. 7 shows that a train T8 operates forwards across two block sections. FIG. 8 shows that trains T9 and T10 operate in the same block section.

[0042] Referring to FIG. 5, the working process of the CTC system in the present disclosure is as follows: an RBC interface is a module responsible for communication with the RBC in the CTC system, and the train information of an RBC system is obtained through the RBC interface, where the train information includes the train length, a train operation direction, the number of the virtual district where the train estimation front end is located, and the distance from the train estimation front end to the front virtual district; and the obtained train information is sent to the management module of the RBC, which is a module responsible for calculating the train position in the CTC system, the train information is received from the RBC interface, and the list of train-associated block section positions, including the start position and the end position of each block section, is calculated in combination with the CTC station yard equipment and a connection relationship and is sent to a display control module. The display control module is a module responsible for displaying a station yard map in the CTC system, the list of train-associated block section positions is received from the management module of the RBC, the coordinate point of the train start position and the coordinate point of the train end position are calculated in combination with the coordinates displayed by the CTC station yard equipment, and a line segment for the train position in novel train control from the coordinate point of the train start position to the coordinate point of the train end position is displayed. The train position in novel train control, that is, the line segment from the coordinate point of the train start position to the coordinate point of the train end position is displayed; and a green line is used on the station yard map to connect the coordinate point of the train start position to the coordinate point of the train end position.

[0043] Based on the same inventive concept, the present disclosure further provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory communicate with one another via the communication bus;

the memory is configured to store a computer program; and

the processor is configured to, when executing the program stored on the memory, implement any step in a method for determining a train position.

[0044] Based on the same inventive concept, the present disclosure further provides a computer-readable storage medium having a computer program stored thereon, where the computer program, when executed by a processor, implements any step in a method for determining a train position.

[0045] The above one or at least one technical solution in the embodiments of the present application has at least the following technical effects:
Based on the above technical solution, the train information, the number of the virtual district where the train estimation front end is located, and the distance from the train estimation front end to the virtual district are obtained; the list of train-associated block section positions, and the start position and the end position of each block section are calculated based on the train information, the number of the virtual district, and the distance from the train estimation front end to the virtual district; and the coordinate point of the train start position and the coordinate point of the train end position are determined based on the list of train-associated block section positions and the coordinates displayed by the CTC station yard equipment. A number of trains in the block section and a positional relationship among the trains can be displayed, thereby improving high-precision display of the train position; and normalized display in a station yard map interface is implemented, making it convenient and intuitive.

[0046] When the train operates in the section, the position of the train inside the block section is represented more precisely compared with the occupancy status using the block sections as the smallest units; in a moving block mode, when multiple trains enter a block section, the system clearly displays the number of trains in the block section and the positional relationship; compared with a temporarily called train status table, the normalized display of the information on the train position, the train direction, and the train length on the station yard map interface is implemented, making it convenient and intuitive; and the display of the train position on the station yard map interface of the CTC system focuses on displayed coordinate points of a train head position and a train tail position of each train, and the conversion from kilometer posts of the line to screen coordinate points is implemented by virtue of the original kilometer posts of block sections and coordinates displayed on a screen in the system.

[0047] While the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that they may still perform modifications on the technical solutions described in the foregoing embodiments or perform equivalent substitutions on part of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions in the embodiments of the present disclosure.

Claims

1. A method for determining a train position, characterized by comprising:

obtaining train information, a number of a virtual district where a train estimation front end is located, and a distance from the train estimation front end to the virtual district;

calculating a list of train-associated block section positions, and a start position and an end position of each block section based on the train information, the number of the virtual district, and the distance from the train estimation front end to the virtual district; and

determining a coordinate point of a train start position and a coordinate point of a train end position based on the list of train-associated block section positions and coordinates displayed by centralized traffic control (CTC) station yard equipment.

2. The method according to claim 1, characterized in that the train information comprises a train length and a train operation direction.

3. The method according to claim 1, characterized in that the calculating a list of train-associated block section positions comprises: determining a block section corresponding to the number of the virtual district where the train estimation front end is located as a current block section; and
obtaining a length of the current block section, calculating a first sum of the distance from the train estimation front end to the front virtual district and the train length, and when the first sum is greater than the length of the current block section, adding the current block section to a list of train-associated block sections.

4. The method according to claim 1 or 3, characterized by further comprising:
dividing the distance from the train estimation front end to the front virtual district by the length of the current block section to obtain a ratio, wherein the ratio is a position of a train in the current block section, and when the ratio is 1, position calculation ends.

5. The method according to claim 4, characterized in that a first difference value between the first sum and the length of the current block section is calculated, wherein the first difference value is a remaining train length of the train outside the current block section.

6. The method according to claim 5, characterized in that when the remaining train length is greater than the length of the current block section, the current block section is added to the list of train-associated block sections, the start position is 0, and the end position is 1.

7. The method according to claim 5, characterized in that when the remaining train length is less than or equal to the length of the current block section, the current block section is added to the list of train-associated block sections, the start position is 0, and the end position is a ratio of the remaining train length to the length of the current block section.

8. The method according to claim 2, characterized in that when the train operation direction is a forward operation direction, a rear block section of the current block section is searched for;

when the train operation direction is not the forward operation direction, a front block section of the current block section is searched for and recorded as a next block section; and

when the next block section does not exist, the current block section is reset to the next block section.

9. The method according to claim 2, characterized in that when the train operation direction is a backward operation direction, the start position is reset by subtracting the original end position from 1, and the end position is reset by subtracting the original start position from 1.

10. The method according to claim 1, characterized in that the current block section is added to the list of train-associated block sections, the start position is the ratio of the distance from the train estimation front end to the front virtual district to the length of the current block section, and the end position is a ratio of the first sum to the length of the current block section.

11. The method according to claim 1, characterized in that the determining a coordinate point of a train start position and a coordinate point of a train end position based on the list of train-associated block section positions and coordinates displayed by CTC station yard equipment comprises: determining whether the start position and the end position in the list of train-associated block sections are changed, and when the start position and the end position in the list of train-associated block sections are changed, calculating a length of the block section, a start offset of the train, an end offset of the train, the coordinate point of the train start position, and the coordinate point of the train end position.

12. The method according to claim 11, characterized in that the length of the block section is a distance from a start coordinate point to an end coordinate point; the length of the block section is multiplied by the train start position to obtain a train start position offset; the length of the block section is multiplied by the train end position to obtain a train end position offset;
a sum of an initial end of the block section and the train start position offset is calculated to obtain the coordinate point of the train start position; and a sum of the initial end of the block section and the train end position offset is calculated to obtain the coordinate point of the train end position.

13. A system for determining a train position, characterized by comprising:

an obtaining module configured to obtain train information, a number of a virtual district where a train estimation front end is located, and a distance from the train estimation front end to the virtual district;

a calculation module configured to calculate a list of train-associated block section positions, and a start position and an end position of each block section based on the train information, the number of the virtual district, and the distance from the train estimation front end to the virtual district; and

a determination module configured to determine a coordinate point of a train start position and a coordinate point of a train end position based on the list of train-associated block section positions and coordinates displayed by CTC station yard equipment.

14. An electronic device, characterized by comprising a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with one another via the communication bus;

the memory is configured to store a computer program; and

the processor is configured to, when executing the program stored on the memory, implement steps of the method according to any one of claims 1 to 12.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements steps of the method according to any one of claims 1 to 12.

Drawing