Improvement method of locomotive synchronous control system
By calibrating train time synchronization through the GNSS module and combining train position and operating condition information, the communication delay problem in the locomotive synchronous operation system is solved, higher synchronous operation consistency is achieved, and train impact and braking inconsistency are reduced.
Patent Information
- Application Number
- CN202510973406.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-15
- Publication Date
- 2025-09-26
AI Technical Summary
The uncertainty of wireless communication delay in the locomotive synchronous operation system leads to problems such as large longitudinal impact of the train, excessive coupler force, and unbalanced braking. The existing system cannot achieve effective synchronous operation.
The GNSS module is used for time synchronization, and the local time timing benchmark of each unit train is calibrated through the satellite second pulse signal. The train position and operating condition information are combined to plan future control actions. After the communication is interrupted, the system will resynchronize and periodically correct the time error to achieve time consistency between systems.
It reduces the longitudinal impact of the train and abnormal coupler force, reduces the probability of inconsistent air brakes, and improves the synchronization of the entire train's motion state.
Smart Images
Figure CN120697815A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of heavy-load combination trains, and in particular relates to a method for improving a locomotive synchronous control system. Background Art
[0002] The locomotive synchronization control system is the core system for operating distributed power long and heavy-load trains. It is used to synchronize the operating actions of each locomotive at different positions in a dispersed train to achieve synchronization of traction, braking and relief of the entire train and achieve the goal of safe driving.
[0003] The basic principle of the locomotive synchronous operation system is to transmit the operating actions of the leading locomotive to the rear locomotives in the train. The rear locomotives respond to the operating actions of the leading locomotive in real time. Since the locomotives are dispersed in different positions in the train, communication between the trains is carried out by wireless communication. Due to the influence of the external environment, the communication delay is uncertain. The uncertain communication delay brings considerable problems to the synchronous operation of the trains, resulting in adverse consequences such as large longitudinal impact of the train, excessive coupler force, and unbalanced braking.
[0004] Furthermore, existing locomotive synchronous control systems emphasize only synchronous operation. Due to factors such as transmission system delays and trains on different line slopes, fully synchronized operation can cause problems such as longitudinal impact and abnormally increased coupler forces. In reality, the desired control effect of each locomotive in the formation is synchronization, rather than strict synchronization. Summary of the Invention
[0005] In order to solve the above technical problems, the present invention provides an improved method for a locomotive synchronous control system.
[0006] The specific plan is as follows: A method for improving a locomotive synchronous control system comprises the following steps: S1): When each unit train establishes a communication connection, the time of the synchronous operation system of each unit train is synchronized; S2): Obtain the location of each unit train, the line data ahead and the driving permission information; S3): The leading locomotive obtains the operating condition information of the leading train and plans the future maneuvers of the leading locomotive based on the signal light status in the section where the leading train is located. The time when the maneuver occurs is marked with local time, and the maneuver sequence information is sent to the trailing locomotive at the same time; S4): The rear locomotive obtains the positions of all the locomotives in front of it, the current operating conditions of all the locomotives in front of it, and the future operating actions of all the locomotives in front of it. Based on the time synchronization information, it converts the local time stamp and plans the future operating actions of the rear train in combination with the distance between the rear locomotive and the adjacent front train and the operating condition information of the rear train. The time when the rear train's operating action occurs is marked with local time. It is determined whether there is another locomotive behind the rear locomotive. If there is, the operation sequence information is sent again to the next rear locomotive and step S4 is repeated); S5): Execute the planned operation on time. Each unit train uses the collected changes in the corresponding train running speed as feedback information to periodically adjust the corresponding locomotive operation and operation plan.
[0007] The unit train includes a locomotive and a carriage, and the locomotive drives the carriage to move. The unit train in the first row is the head train, and the head train includes a head locomotive and a head carriage, and the head locomotive drives the head carriage to move. The unit train after the head train is the rear train, and the rear train includes a rear locomotive and a rear carriage, and the rear locomotive drives the rear carriage to move. The number of the rear trains is not less than one.
[0008] The head locomotive is communicatively connected with the rear locomotive.
[0009] The method for performing time synchronization of the synchronous operation systems of each unit train includes the following steps: S11): Each unit train synchronous control system is equipped with a GNSS module, which receives satellite time and obtains the second pulse signal of the satellite time through the GNSS module; S12): Determine the local time reference value of each unit train based on the satellite second pulse; S13): Send the timing reference value of this unit train to other unit trains; S14): Receive the timing reference value sent by other unit trains to this unit train as the time reference source for vehicle-to-vehicle communication data synchronization.
[0010] After each communication interruption, when each unit train re-establishes the communication connection, the time of the synchronous operation system of each unit train is synchronized.
[0011] When the unit train is running, time synchronization is performed once every hour to correct the accumulated time error.
[0012] The operating condition information includes train line data ahead, driving permission, locomotive traction, braking characteristics, traction train weight and braking performance.
[0013] The present invention discloses an improved method for a locomotive synchronous control system, which adopts an inter-system time synchronization method for synchronization. Different operation plans are made in combination with the differences in locomotives, trains and positions to achieve synchronization of the final motion state of the entire train. This can better adapt to the differences in synchronization operations caused by communication delays, different line environments, different train characteristics, and locomotive characteristics, reduce longitudinal impact of the train, reduce the occurrence of abnormal coupler forces, and reduce the probability of inconsistent air braking. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a flow chart of the synchronous operation of train units.
[0015] Figure 2 This is a flowchart of time synchronization.
[0016] Figure 3 It is a structural diagram of a distributed heavy-load train. DETAILED DESCRIPTION
[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the implementation of the present invention, not the entire implementation. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.
[0018] like Figures 1 to 2 As shown, a method for improving a locomotive synchronous control system includes the following steps: S1): When each unit train establishes a communication connection, the time of the synchronous operation system of each unit train is synchronized; S2): Obtain the location of each unit train, the line data ahead and the driving permission information; S3): The leading locomotive obtains the operating condition information of the leading train and plans the future maneuvers of the leading locomotive based on the signal light status in the section where the leading train is located. The time when the maneuver occurs is marked with local time, and the maneuver sequence information is sent to the trailing locomotive at the same time; S4): The rear locomotive obtains the positions of all the locomotives in front of it, the current operating conditions of all the locomotives in front of it, and the future operating actions of all the locomotives in front of it. Based on the time synchronization information, it converts the local time stamp and plans the future operating actions of the rear train in combination with the distance between the rear locomotive and the adjacent front train and the operating condition information of the rear train. The time when the rear train's operating action occurs is marked with local time. It is determined whether there is another locomotive behind the rear locomotive. If there is, the operation sequence information is sent again to the next rear locomotive and step S4 is repeated); S5): Execute the planned operation on time. Each unit train uses the collected changes in the corresponding train running speed as feedback information to periodically adjust the corresponding locomotive operation and operation plan.
[0019] A unit train consists of a locomotive and carriages. The locomotive drives the carriages to move. Figure 3 As shown, the unit train in the first row is the head train 1, which includes a head locomotive 2 and a head car 3. The head locomotive 2 drives the head car 3 to move. The unit train after the head train is the rear train 6, which includes a rear locomotive 4 and a rear car 5. The rear locomotive 4 drives the rear car 5 to move. The number of the rear trains 6 is not less than one.
[0020] The head locomotive is communicatively connected with the rear locomotive.
[0021] like Figure 2 As shown, the method for performing time synchronization on the synchronous operation systems of each unit train includes the following steps: S11): Each unit train synchronous control system is equipped with a GNSS module, which receives satellite time and obtains the second pulse signal of the satellite time through the GNSS module; S12): Determine the local time reference value of each unit train based on the satellite second pulse; S13): Send the timing reference value of the unit train to other unit trains, that is, send the local timestamp of the local GNSS corresponding second time to other train units; S14): Receive the timing reference value sent by other unit trains to this unit train as the time reference source for vehicle-to-vehicle communication data synchronization.
[0022] After each communication interruption, when each unit train re-establishes the communication connection, the time of the synchronous operation system of each unit train is synchronized.
[0023] When the unit train is running, time synchronization is performed once every hour to correct the accumulated time error.
[0024] The operating condition information includes train line data ahead, driving permission, locomotive traction, braking characteristics, traction train weight and braking performance.
[0025] The present invention discloses an improved method for a locomotive synchronous control system, which adopts an inter-system time synchronization method for synchronization. Different operation plans are made in combination with the differences in locomotives, trains and positions to achieve synchronization of the final motion state of the entire train. This can better adapt to the differences in synchronization operations caused by communication delays, different line environments, different train characteristics, and locomotive characteristics, reduce longitudinal impact of the train, reduce the occurrence of abnormal coupler forces, and reduce the probability of inconsistent air braking.
[0026] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.
Claims
1. A method for improving a locomotive synchronous control system, characterized in that: The steps include: S1): When each unit train establishes a communication connection, the time of the synchronous operation system of each unit train is synchronized; S2): Obtain the location of each unit train, the line data ahead and the driving permission information; S3): The leading locomotive obtains the operating condition information of the leading train and plans the future maneuvers of the leading locomotive based on the signal light status in the section where the leading train is located. The time when the maneuver occurs is marked with local time, and the maneuver sequence information is sent to the trailing locomotive at the same time; S4): The rear locomotive obtains the positions of all the locomotives in front of it, the current operating conditions of all the locomotives in front of it, and the future operating actions of all the locomotives in front of it. Based on the time synchronization information, it converts the local time stamp and plans the future operating actions of the rear train in combination with the distance between the rear locomotive and the adjacent front train and the operating condition information of the rear train. The time when the rear train's operating action occurs is marked with local time. It is determined whether there is another locomotive behind the rear locomotive. If there is, the operation sequence information is sent again to the next rear locomotive and step S4 is repeated); S5): Execute the planned operation on time. Each unit train uses the collected changes in the corresponding train running speed as feedback information to periodically adjust the corresponding locomotive operation and operation plan.
2. The method for improving the locomotive synchronous control system according to claim 1, characterized in that: The unit train includes a locomotive and a carriage, and the locomotive drives the carriage to move. The unit train in the first row is the head train, and the head train includes a head locomotive and a head carriage, and the head locomotive drives the head carriage to move. The unit train after the head train is the rear train, and the rear train includes a rear locomotive and a rear carriage, and the rear locomotive drives the rear carriage to move. The number of the rear trains is not less than one.
3. The method for improving the locomotive synchronous control system according to claim 2, characterized in that: The head locomotive is communicatively connected with the rear locomotive.
4. The method for improving a locomotive synchronous control system according to claim 1, characterized in that: The method for performing time synchronization of the synchronous operation systems of each unit train includes the following steps: S11): Each unit train synchronous control system is equipped with a GNSS module, which receives satellite time and obtains the second pulse signal of the satellite time through the GNSS module; S12): Determine the local time reference value of each unit train based on the satellite second pulse; S13): Send the timing reference value of this unit train to other unit trains; S14): Receive the timing reference value sent by other unit trains to this unit train as the time reference source for vehicle-to-vehicle communication data synchronization.
5. The method for improving a locomotive synchronous control system according to claim 1, characterized in that: After each communication interruption, when each unit train re-establishes the communication connection, the time of the synchronous operation system of each unit train is synchronized.
6. The method for improving a locomotive synchronous control system according to claim 1, characterized in that: When the unit train is running, time synchronization is performed once every hour to correct the accumulated time error.
7. The method for improving a locomotive synchronous control system according to claim 1, characterized in that: The operating condition information includes train line data ahead, driving permission, locomotive traction, braking characteristics, traction train weight and braking performance.