Train length and tail identification method based on existing vehicle information and station yard code bit information

Abstract

This invention belongs to the field of rail transit technology, specifically relating to a method for identifying train length and tail of a train based on current vehicle information and station code information. The method includes an onboard host obtaining the train length L based on train formation information from the current vehicle information. T The onboard host then adjusts the settings according to the train length L. T The train's head position and electronic map information are used to calculate the train's tail position. The onboard unit sends the head and tail positions to the RBC (Rail Bus Control Center) and awaits train permission. After the train permission is issued, the train departs the station. The onboard unit updates the tail position in real time based on the changes in the head position. Simultaneously, based on the code information from the interlocking equipment, the onboard unit records the train's travel distance L′ after it has completely passed the first pair of insulated joints inside the entrance signal in the direction of travel. T ; Calculate L T With L′ T Length difference L diff Determine L diff Does it exceed the preset error range? If so, then adjust the train length L. T The maximum train length is set to a preset value. This invention ensures safe train operation and improves railway transportation efficiency.

Description

Technical Field

[0001] This invention belongs to the field of rail transit technology, specifically relating to a method for identifying train length and tail of a train based on current vehicle information and station code information. Background Technology

[0002] In existing moving block train control systems, the train length and tail position are mainly used by the RBC (Radio Block Center) to calculate the train's movement permission for the following train.

[0003] Currently, there are two main methods for obtaining train length and tail position:

[0004] 1. The locomotive driver manually inputs the number of locomotives and cars, and the train length is obtained by summing the numbers. The onboard equipment then calculates the position of the rear of the train based on the train length. The biggest drawback of this method is that it cannot guarantee that the driver will input the number of locomotives and cars accurately every time. Incorrect input will lead to errors in the calculation of the train length and the position of the rear of the train, which will in turn pose a safety hazard to the trains behind.

[0005] 2. Installing a GPS positioning device at the rear of the train allows for direct determination of the rear position via GPS. The train length is then calculated using the coordinates of the front and rear positions in conjunction with an electronic map. However, this method requires attaching the GPS device after each train formation and removing it when the train is de-formed. For local freight railways, especially those operating in mining areas and relying on short-haul routes, this significantly impacts transportation efficiency. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems and shortcomings by proposing a method for identifying train length and tail of the train based on current vehicle information and station code information. This method not only ensures the safe and reliable operation of trains and avoids loss of life and property caused by train collisions and rear-end accidents, but also improves the efficiency of railway transportation.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This invention provides a method for identifying train length and tail position based on current vehicle information and station code information, comprising the following steps:

[0009] The onboard unit calculates the train length L by adding the locomotive and rolling stock lengths based on the train formation information from the current vehicle data. T ;

[0010] The onboard host then determines the train length L based on the train's dimensions. T The column tail position is calculated from the column head position and electronic map information;

[0011] The onboard unit sends the head and tail positions of the train to the RBC and waits for driving permission.

[0012] After the train travel permit is issued, the train departs the station. The onboard host updates the position of the rear train in real time based on the change in the position of the head of the train. At the same time, based on the code information feedback from the interlocking equipment, the onboard host records the train travel distance L′ after the train has completely passed the first pair of insulating joints inside the entrance signal in the direction of travel. T As the train conductor L T Validate the data;

[0013] Calculate L T With L′ T Length difference L diff Determine L diff Does it exceed the preset error range? If so, then adjust the train length L. T Set to the preset maximum train length; otherwise, assume the verified train length L is correct. T It is accurate.

[0014] According to the train length and tail identification method based on current vehicle information and station code information of the present invention, preferably, after the on-board host is powered on, it first obtains the head position information of the train, and then obtains the current vehicle information in the CTC system through RBC.

[0015] According to the train length and tail identification method based on current vehicle information and station code information of the present invention, preferably, the head position information includes the station where the head of the train is located, the track number, and the position of the head of the train on the track.

[0016] According to the train length and tail identification method based on current vehicle information and station code information of the present invention, preferably, the train formation information in the current vehicle information includes the train formation sequence, vehicle type, empty and loaded cars, and length change information, and the vehicle length is calculated by changing the length of the vehicle type.

[0017] According to the train length and tail identification method based on current vehicle information and station code information of the present invention, preferably, the train travel distance L′ is obtained. T The process is as follows: The onboard host obtains the code position information of the interlocking equipment in real time through the RBC, analyzes the occupancy status of the physical section, and starts recording the travel distance through the onboard host speed measurement unit when the first section inside the entrance signal in the travel direction is occupied. Recording stops when the section before the first section inside the entrance signal in the travel direction is cleared. The travel distance recorded during this period is recorded as the train travel distance L′. T As the train conductor L T Verify the data.

[0018] According to the train length and tail identification method based on current vehicle information and station code position information of the present invention, preferably, when the train enters the section, the train head position and the verified train length L are used to identify the train length and tail position. T The column tail position is calculated and updated in real time based on electronic map information.

[0019] According to the train length and tail identification method based on current vehicle information and station code information of the present invention, preferably, after the train enters the station and stops, it is determined whether the tail position is outside the physical section actually occupied by the train according to the station code information. If so, the tail mark is moved to the section occupied by the train.

[0020] According to the train length and tail identification method based on current vehicle information and station code position information of the present invention, preferably, the length difference L diff The calculation formula is as follows: L diff =|L T -L′ T |

[0021] According to the train length and tail identification method based on current vehicle information and station code information of the present invention, preferably, the preset error range is determined comprehensively based on the distance from wheelset to coupler of different locomotives and vehicles, train speed, track relay response time and network delay factors.

[0022] According to the train length and tail identification method based on current vehicle information and station code information of the present invention, preferably, the preset maximum train length is determined comprehensively based on the maximum traction capacity of the operating section and the transportation operation situation.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. Compared to manual data entry, data obtained through current train information and station code position information is more accurate and reliable. Even if there are errors in the current train information in the CTC system or / and interlocking equipment malfunctions, resulting in one or both types of data being incorrect, cross-checking can reveal the error. Although it's impossible to determine which data is incorrect, setting the train length to the preset maximum length and then calculating the rear position ensures that following trains on the same track travel according to a safe rear position, preventing rear-end collisions and effectively guaranteeing train operation safety.

[0025] 2. For local freight railways, where the distance between two stations is relatively short, if a GPS positioning device is installed at the rear of the train, it must be disassembled and reassembled every time the train needs to be reassembled upon arrival at a station, requiring frequent disassembly and reassembly operations during railway transportation. This invention eliminates the need to install and remove the GPS tail device. The tail position is calculated based on the head position, train length, and electronic map information, which can effectively improve the transportation efficiency of local freight railways that mainly operate in a "short-haul" mode.

[0026] 3. When the tail position received by RBC is inconsistent with the actual tail position, if the tail position is outside the actual physical section occupied by the train after the train stops on the track, and the tail position is not adjusted, the incorrect tail position will be used as the tracking point for subsequent ATP trains, and the subsequent ATP trains may not be able to enter the station or pass through. In this case, the present invention moves the tail mark to the section occupied by the train to ensure that the tail position does not expand the impact. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. The drawings are merely illustrative of some embodiments of the present invention and are not intended to limit the scope of the present invention to all embodiments.

[0028] Figure 1 This is a flowchart illustrating the train length and tail identification method based on current vehicle information and station code position information according to an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the section occupancy when a train is waiting for traffic permission according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the occupancy of the first section inside the train direction entry signal in this embodiment of the invention, showing the occupancy of the section at the previous moment.

[0031] Figure 4 This is a schematic diagram of section occupancy when the first section inside the train's direction of travel signal is occupied, according to an embodiment of the present invention.

[0032] Figure 5 This is a schematic diagram of the section occupancy of the previous section before the clearing of the first section inside the train direction entry signal in this embodiment of the invention.

[0033] Figure 6 This is a schematic diagram of the section occupancy when the section before the first section inside the train direction entry signal is cleared according to an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the section occupancy after a train enters and comes to a complete stop at the next station, according to an embodiment of the present invention.

[0035] Figures 2-7 The bold black lines in the text indicate the occupancy status of the section. Detailed Implementation

[0036] The exemplary solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art.

[0037] like Figure 1 As shown, the train length and tail identification method based on current vehicle information and station code position information in this embodiment includes the following steps:

[0038] Step S1: After the onboard host is powered on, it obtains the precise position information of the train head through the GPS positioning device installed at the head of the train. The position information of the train head includes the station where the train head is located, the track number, and the position of the train head on the track.

[0039] Step S2: The onboard host obtains the current vehicle information from the CTC system through the RBC. Based on the train formation information in the current vehicle information, it sequentially adds the lengths of the locomotive and all the vehicles included in the train to obtain the train length L. T And according to the train length L T The column tail position is calculated from the column head position and electronic map information.

[0040] Specifically, the train information in the current vehicle information includes the train formation sequence, vehicle type, empty and loaded cars, and length conversion information, and the vehicle length is calculated by converting the vehicle type to the length conversion information.

[0041] In step S3, the onboard unit sends the column head position from step S1 and the column tail position information calculated in step S2 to the RBC, and waits for train operation permission. At this time, the station section occupancy is as follows: Figure 2 As shown.

[0042] When the CTC system provides incorrect vehicle information to the onboard unit, the train length and rear position calculated using this incorrect information will be inaccurate. If a following train travels according to the incorrect rear position of the preceding train, a collision or rear-end accident is likely to occur. This embodiment introduces the train travel distance L′. T For the train length L calculated in step S2 T Perform verification.

[0043] Step S4: After the train travel permit is issued, the train departs the station. The onboard host updates the position of the rear train in real time based on the change in the position of the head of the train. At the same time, the onboard host records the train travel distance L′ after the train has completely passed the first pair of insulating joints inside the entrance signal in the direction of travel, based on the code position information feedback from the interlocking equipment. T As the train conductor L T Verify the data.

[0044] The following explanation uses the first pair of insulating joints inside the station signal in the direction of travel as the distance measuring node to illustrate how to obtain the train travel distance L′. T The process:

[0045] The onboard unit obtains the code position information of the interlocking equipment in real time through the RBC and analyzes the occupancy status of the physical section. At this time, the occupancy status of the station section changes from Figure 2 Towards Figure 3 The change occurs when the first section inside the station entrance signal in the direction of travel is occupied, i.e., the station section occupancy status changes from... Figure 3 Change to Figure 4 At that time, the travel distance was recorded via the onboard host speed measurement unit, and the station section occupancy status changed from [previous time]. Figure 4 Towards Figure 5 The change occurs when the section preceding the first section inside the station entrance signal in the direction of travel is cleared, meaning the station section occupancy status changes from [previous section]. Figure 5 Change to Figure 6 At the specified time point, recording stops, and the distance traveled during that time period is recorded as the train travel distance L′. T As the train conductor L T Verify the data.

[0046] When the current train information in the CTC system is incorrect, the calculated train length and tail position will be inaccurate. When there is a faulty track siding or track section malfunction, the section occupancy status obtained through the fault interlocking equipment may deviate from the actual situation, resulting in inaccurate train travel distances. In real-world scenarios, one or both sets of data may be incorrect. Cross-checking only reveals the data error, not which one. In this case, we consider an extreme scenario where both sets of data are incorrect and neither is accepted. We then set the train length to the preset maximum length and calculate the tail position, ensuring that following trains on the same track travel according to a safe tail position, preventing collisions with the tail of preceding trains and guaranteeing safe operation. The process is as follows: steps S5-S7.

[0047] Step S5, calculate L T With L′ T Length difference L diff =|L T -L′ T |, determine L diff If the error exceeds the preset error range, proceed to step S6; otherwise, proceed to step S7.

[0048] The preset error range is determined comprehensively based on factors such as the distance from the wheelset to the coupler of different locomotives and vehicles, train speed, track relay response time, and network latency.

[0049] Step S6, the train length L TThe preset maximum vehicle length is determined based on the maximum traction capacity of the operating section and the transportation operation conditions, such as the loading capacity of the loading station, the unloading capacity of the unloading station, and the capacity of the destination station.

[0050] Step S7: The train enters the section and travels according to the position of the train head and the verified train length L. T The column tail position is calculated and updated in real time based on electronic map information.

[0051] If the position of the rear of the train does not match the actual position after the train has come to a stop on the track (mainly because the train length is set to the preset maximum length when the train length verification error is too large), and the position of the rear of the train is outside the actual physical section occupied by the train, and the incorrect position of the rear of the train is used as the tracking point for subsequent ATP trains, the subsequent ATP trains may not be able to enter the station or pass through.

[0052] Step S8: After the train has come to a complete stop at the station, determine whether the position of the train's tail is outside the actual physical section occupied by the train based on the station yard code information. Figure 7 If the area outside the bold black line segment is such, proceed to step S9; otherwise, proceed to step S10.

[0053] Step S9, move the tail marker to the section occupied by the train, i.e. Figure 7 The area within the bold black line section is designed to avoid impacting the entry and passage of other ATP trains, ensuring that the rear of the train does not amplify the impact.

[0054] Step S10, End.

[0055] This invention cross-checks the train length calculated from current vehicle information with the train travel distance obtained from station code information to address abnormal situations caused by data errors, thus preventing train rear-end collisions and ensuring train operation safety. Furthermore, if the rear of the train is outside the section it actually occupies after coming to a complete stop on the track, potentially affecting the passage of other trains, adjusting the rear position to within the occupied section will not expand the impact area. This invention eliminates the need for installing GPS positioning devices at the rear of the train, obtaining the rear position through calculation, reducing the workload of railway staff and improving transportation efficiency.

[0056] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media that can store program code, such as ROM, RAM, magnetic disk, or optical disk.

[0058] The preferred embodiments for implementing the present invention have been described in detail above. However, it should be understood that these embodiments are merely illustrative and not intended to limit the scope, application, or construction of the invention in any way. The scope of protection of the present invention is defined by the appended claims and their equivalents. Those skilled in the art can make numerous modifications to the foregoing embodiments under the teachings of this invention, and all such modifications fall within the scope of protection of this invention.

Claims

1. A method for identifying train length and tail of a train based on current vehicle information and station code position information, characterized in that, Includes the following steps: The onboard unit calculates the train length L by adding the locomotive and rolling stock lengths based on the train formation information from the current vehicle data. T ; The onboard host then determines the train length L based on the train's length L. T The column tail position is calculated from the column head position and electronic map information; The onboard unit sends the head and tail positions of the train to the RBC and waits for driving permission. After the train travel permit is issued, the train departs the station. The onboard host updates the position of the rear train in real time based on the change in the position of the head of the train. At the same time, based on the code information feedback from the interlocking equipment, the onboard host records the train travel distance after the train has completely passed the first pair of insulated joints inside the entrance signal in the direction of travel. As the train conductor L T Verify data; obtain train travel distance The process is as follows: The onboard host obtains the code position information of the interlocking equipment in real time through the RBC, analyzes the occupancy status of the physical section, and starts recording the travel distance through the onboard host speed measurement unit when the first section inside the entrance signal in the travel direction is occupied. Recording stops when the section before the first section inside the entrance signal in the travel direction is cleared. The travel distance recorded during this period is recorded as the train travel distance. As the train conductor L T Validate the data; Calculate L T and Length difference L diff Determine L diff Does it exceed the preset error range? If so, then adjust the train length L. T Set to the preset maximum train length; otherwise, assume the verified train length L is correct. T It is accurate; Once the train has come to a complete stop at the station, the system determines whether the tail position of the train is outside the actual physical section occupied by the train based on the station yard code information. If so, the tail mark is moved to the section occupied by the train.

2. The train length and tail identification method based on current vehicle information and station code position information according to claim 1, characterized in that, After the vehicle host is powered on, it first obtains the column head position information, and then obtains the current vehicle information in the CTC system through RBC.

3. The train length and tail identification method based on current vehicle information and station code position information according to claim 2, characterized in that, The column head location information includes the station where the column head is located, the track number, and the position of the column head on the track.

4. The train length and tail identification method based on current vehicle information and station code position information according to claim 1, characterized in that, The train formation information in the current vehicle information includes the train formation sequence, vehicle type, empty and loaded cars, and length change information, and the vehicle length is calculated by changing the length of the vehicle type.

5. The train length and tail identification method based on current vehicle information and station code position information according to claim 1, characterized in that, When the train enters the section, based on the position of the train head and the verified train length L... T The column tail position is calculated and updated in real time based on electronic map information.

6. The train length and tail identification method based on current vehicle information and station code position information according to claim 1, characterized in that, Length difference L diff The calculation formula is as follows: L diff =|L T - | 7. The train length and tail identification method based on current vehicle information and station code position information according to claim 1, characterized in that, The preset error range is determined comprehensively based on factors such as the distance from the wheelset to the coupler of different locomotives and vehicles, train speed, track relay response time, and network delay.

8. The train length and tail identification method based on current vehicle information and station code position information according to claim 1, characterized in that, The preset maximum vehicle length is determined comprehensively based on the maximum traction capacity of the driving section and the transportation operation conditions.

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