A method for repositioning trains at station stops

Abstract

This invention discloses a method for repositioning a train after stopping at a station, relating to the field of train skipping technology. This invention pre-acquires information about the train stopping at the station, including the distance to the target and the protection distance. Combined with OC (Operational Control Center) and ATP (Automatic Train Protection) information exchange with the following train, it obtains the locking distance that allows for timely stopping and achieves the shortest locking distance, thus greatly improving the timing of the train skipping backward for repositioning after stopping at the station.

Description

Technical Field

[0001] This invention relates to the technical field of train jumping methods, specifically to a method for repositioning a train after stopping at a station. Background Technology

[0002] In current urban rail transit systems, when a train stops beyond a stop marker while approaching a station, a repositioning maneuver is required. This involves the train moving backward at low speed for a short distance, also known as a hop. During this process, the onboard ATP (Automatic Train Protection) system is responsible for ensuring the train's safety while moving backward. If the minimum safety distance required by the ATP is less than the distance from the rear of the train to the axle counting point at the station, the onboard ATP needs to request the ground control (ZC) to lock the section preceding the platform to meet the required safety distance. If, at this point, there is a train in the section awaiting locking, the section cannot be locked, and the train cannot perform the repositioning maneuver. Summary of the Invention

[0003] In view of the above-mentioned technical deficiencies, the technical problem to be solved by the present invention is to provide a method for repositioning trains at station stops.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a method for repositioning a train at a station, characterized by comprising the following steps:

[0005] Determine the stopping information of the train at the station. The stopping information includes: the location of the stopping point on the platform.

[0006] The distance S1 beyond the target is obtained by combining parking information;

[0007] The train calculates the protective distance S2 for jumping backward based on S1;

[0008] The train stopping at the station calculates the distance D between itself and the boundary of the platform section based on its own position;

[0009] If S2 is not greater than D, the train does not need to request any locking from OC. The train stopping at the station controls the train to move backward and stop according to the target reverse distance S1.

[0010] If S2 is greater than D, there is a risk that the train will move to the next section when it reverses. The train needs to apply to OC for locking at a distance of S3 on the next section, where S3 = S2 - D.

[0011] The ATP of the stopped train sends the first message of the locking request for the next section distance S3 to the target controller OC;

[0012] After receiving the first information, the OC determines the status of the next segment.

[0013] If there is no train in the next section, the OC will lock the section S3 distance before the inbound section;

[0014] If there is a vehicle in the next section or a vehicle is approaching, the OC sends a second message to the following vehicle asking whether it can stop before the locking point.

[0015] After receiving the second information sent by the OC, the ATP of the following train determines the train's running status.

[0016] If the following vehicle is able to stop before the locking point, the following vehicle's ATP will reply with a parking guarantee information to the OC and set its own movement authorization restriction point as the locking point;

[0017] If the following vehicle is unable to stop before the locking point, the following vehicle's ATP will send a parking refusal message to the OC and continue driving normally;

[0018] If the OC receives a stop guarantee information from the following train, it will lock the area at distance S2 on the next section and simultaneously reply with a lock information indicating that the area after the locking point of the stopping train has been locked.

[0019] After receiving the locking information, the train stops and moves backward.

[0020] Preferably, the position A that the following vehicle can stop at its current speed and immediately apply the brakes is calculated, and the stopping position A of the following vehicle is compared with the stopping guarantee point B issued by OC.

[0021] If the following vehicle is parked further back than the parking guarantee point, meaning the following vehicle can park before the locking point, the following vehicle's ATP will send a parking guarantee message back to the OC and set its own movement authorization restriction point as the locking point;

[0022] If the following vehicle is parked further ahead of the parking guarantee point, and cannot stop before the locking point, the following vehicle's ATP will send a parking guarantee rejection message to the OC and continue driving normally in its original state.

[0023] If OC receives a parking guarantee message from the following train, it replies with a locking message indicating that the distance S4 before the stopping train's locking point has been locked, where S4 is the distance from point B to the stopping train.

[0024] Preferably, after receiving the locking information, the stopping train determines again whether the sum of the locking distance S4 issued by OC and the distance D from the train's target position to the platform section boundary is greater than the protection distance S2 required for the train to jump, i.e., S4+D≥S2. If the condition is met, the stopping train moves backward and stops and repositions according to the target backward distance S1.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. During the jumping process of a train stopping at a station, the safety of the jumping of the train is effectively ensured by taking into account the driving status of the following train;

[0027] 2. When a train skips a stop, only a short distance needs to be locked, instead of the entire section, which increases the chances of a train skipping a stop.

[0028] 3. When a train skips a stop, only a short distance needs to be locked, instead of the entire section, reducing the possibility of the skipping train affecting subsequent trains. Attached Figure Description

[0029] Figure 1 This is used to illustrate the actual meaning of each parameter in this embodiment. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] A method for realigning trains at a station platform involves controlling the stopped train to jump backward, thereby ensuring that the entrances / exits on the platform coincide with the entrances / exits on the stopped train to the greatest extent possible. The specific steps include the following:

[0032] First, determine the stopping information of the train, which includes: the length of the train, the length of the platform, and the specific location of the train. The stopping standard is that the middle position X of the train coincides with the middle position Y of the platform.

[0033] The distance S1 for crossing the target is calculated by combining the parking information. The distance S1 is the distance between the middle position of the stopped train and the middle position of the platform. Therefore, it is necessary to control the stopped train to jump backward by S1. However, since the actual stopped train will still be affected by inertia and other factors during the backward jump, a protective distance needs to be reserved. The protective distance calculated from S1 is S2, where S2 = S1 + N, and N is a normal number. In addition, the distance D from one end of the stopped train in the direction to jump to one end of the platform can also be calculated.

[0034] At this point, controlling the skipping of the train at the station requires determining the value between S2 and D.

[0035] If S2 is not greater than D, the train does not need to request any locking from OC. The train stopping at the station controls the train to move backward and stop according to the target reverse distance S1.

[0036] If S2 is greater than D, there is a risk that the train will move to the next section when it reverses. The train needs to apply to OC for locking at a distance of S3 on the next section, where S3 = S2 - D.

[0037] The ATP of the stopped train sends the first message of the locking request for the next section distance S3 to the target controller OC;

[0038] After receiving the first information, the OC determines the status of the next segment.

[0039] If there is no train in the next section, the OC will lock the section S3 distance before the inbound section;

[0040] If there is a vehicle in the next section or a vehicle is approaching, the OC sends a second message to the following vehicle asking whether it can stop before the locking point.

[0041] After receiving the second information sent by the OC, the ATP of the following train determines the train's running status.

[0042] Calculate the position A that the following vehicle can stop at its current speed if it immediately applies the brakes, and compare the stopping position A with the stopping guarantee point B issued by OC.

[0043] If the following vehicle is parked further back than the parking guarantee point, meaning the following vehicle can park before the locking point, the following vehicle's ATP will send a parking guarantee message back to the OC and restrict the parking guarantee point B to its own movement authorization restriction point;

[0044] If the following vehicle is parked further ahead of the parking guarantee point, and cannot stop before the locking point, the following vehicle's ATP will send a parking guarantee rejection message to the OC and continue driving normally in its original state.

[0045] If OC receives a parking guarantee message from the following train, it replies with a locking message indicating that the distance S4 before the stopping train's locking point has been locked, where S4 is the distance from point B to the stopping train.

[0046] After receiving the locking information, the stopped train will again determine whether the sum of the locking distance S4 issued by OC and the distance D from the train's crossing point to the platform section boundary is greater than the protection distance S2 required for the train to jump. That is, it will determine whether S4+D≥S2. If so, the stopped train will move backward and stop and reposition itself according to the target retreat distance S1.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for repositioning a train after stopping at a station platform, characterized in that, Includes the following steps: Determine the stopping information of the train at the station. The stopping information includes: the location of the stopping point on the platform. The distance S1 beyond the target is obtained by combining parking information; The train calculates the protective distance S2 for jumping backward based on S1; The train stopping at the station calculates the distance D between itself and the boundary of the platform section based on its own position; If S2 is not greater than D, the train does not need to request any locking from OC. The train stopping at the station controls the train to move backward and stop according to the target reverse distance S1. If S2 is greater than D, there is a risk that the train will move to the next section when it reverses. The train needs to apply to OC for locking at a distance of S3 on the next section, where S3 = S2 - D. The ATP of the stopped train sends the first message of the locking request for the next section distance S3 to the target controller OC; After receiving the first information, the OC determines the status of the next segment. If there is no train in the next section, the OC will lock the section S3 distance before the inbound section; If there is a vehicle in the next section or a vehicle is approaching, the OC sends a second message to the following vehicle asking whether it can stop before the locking point. After receiving the second information sent by the OC, the ATP of the following train determines the train's running status. If the following vehicle is able to stop before the locking point, the following vehicle's ATP will reply with a parking guarantee information to the OC and set its own movement authorization restriction point as the locking point; If the following vehicle is unable to stop before the locking point, the following vehicle's ATP will send a parking refusal message to the OC and continue driving normally; If the OC receives a stop guarantee information from the following train, it will lock the area at distance S2 on the next section and simultaneously reply with a lock information indicating that the area after the locking point of the stopping train has been locked. After receiving the locking information, the train stops and moves backward to a stop. The methods for repositioning trains at platform stops also include: Calculate the position A that the following vehicle can stop at its current speed if it immediately applies the brakes, and compare the stopping position A with the stopping guarantee point B issued by OC. If the following vehicle is parked further back than the parking guarantee point, meaning the following vehicle can park before the locking point, the following vehicle's ATP will send a parking guarantee message back to the OC and set its own movement authorization restriction point as the locking point; If the following vehicle is parked further ahead of the parking guarantee point, and cannot stop before the locking point, the following vehicle's ATP will send a parking guarantee rejection message to the OC and continue driving normally in its original state. If OC receives a parking guarantee message from the following train, it replies with a locking message indicating that the distance S4 before the stopping train's locking point has been locked, where S4 is the distance from point B to the stopping train.

2. The method for repositioning a train at a station as described in claim 1, characterized in that, After receiving the locking information, the stopped train will again determine whether the sum of the locking distance S4 issued by OC and the distance D from the train's crossing point to the platform section boundary is greater than the protection distance S2 required for the train to jump. That is, it will determine whether S4+D≥S2. If so, the stopped train will move backward and stop and reposition itself according to the target retreat distance S1.

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