CN109017881B - Train identity management method based on train tracker - Google Patents
Train identity management method based on train tracker Download PDFInfo
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- CN109017881B CN109017881B CN201810585777.7A CN201810585777A CN109017881B CN 109017881 B CN109017881 B CN 109017881B CN 201810585777 A CN201810585777 A CN 201810585777A CN 109017881 B CN109017881 B CN 109017881B
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- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
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Abstract
The invention relates to a train identity management method based on a train tracker, which comprises the following steps: step A: a train tracker is arranged on a running line and train tracker sections are divided; and B: initializing the operation of a train tracker; and C: screening an initial train identity by a train tracker; step D: registering the train identity of a train tracker by a train VOBC (volume based on code division multiple Access); step E: the train VOBC acquires the train identity of a train tracker; step F: the train VOBC logs off the train tracker train identity. Compared with the prior art, the method has the advantages of simplifying the system structure, improving the operation efficiency, saving the project construction cost and the like.
Description
Technical Field
The invention relates to the technical field of rail transit signal safety control, in particular to a train identity management method based on a train tracker for a train-to-vehicle communication train control system.
Background
The traditional CBTC system consists of ground equipment and vehicle-mounted equipment, the train tracking operation based on moving block is realized through bidirectional continuous wireless communication between a train and the ground, and the ground equipment control is taken as the main part in the whole control system. Therefore, the traditional CBTC system also has the problems that the system structure is complex, the project is difficult to implement, the influence range of ground equipment faults is wide, the train-ground equipment information is transmitted for multiple times to influence the train tracking efficiency and the like. The train-vehicle communication train control system is a distributed control system taking vehicle-mounted equipment as a core, ground equipment is greatly weakened in the system, operation risks brought by a centralized control system are reduced, and meanwhile, the system structure is simpler, and project implementation and later-stage system maintenance are facilitated. The train-to-vehicle communication train control system realizes train position tracking through direct communication between a train and an adjacent train, how to manage identity information of running trains in the system is the key for realizing the train-to-vehicle communication train control system, the existing method is mainly realized by adopting central registration, polling and other modes, and the following problems are usually encountered in practical application:
1. if a train in the registered trains cannot normally communicate due to faults, other trains cannot obtain the state and position information of the fault train, so that the system is guided to a safe side to process, and the influence of the fault of a single train is large;
2. the registered train needs to communicate with all other registered trains in real time, and the system communication resource overhead is large.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a train identity management method based on a train tracker, which simplifies the system structure, improves the operation efficiency and saves the project construction cost.
The purpose of the invention can be realized by the following technical scheme:
a train identity management method based on a train tracker comprises the following steps:
step A: a train tracker is arranged on a running line and train tracker sections are divided;
and B: initializing the operation of a train tracker;
and C: screening an initial train identity by a train tracker;
step D: registering the train identity of a train tracker by a train VOBC (volume based on code division multiple Access);
step E: the train VOBC acquires the train identity of a train tracker;
step F: the train VOBC logs off the train tracker train identity.
Preferably, the train tracker arranged in the operation line of step a needs to cover all track sections of the line, the track sections covered by the train tracker are called train tracker sections, and the train tracker sections do not contain switch points.
Preferably, said train tracker segment does not enforce a "secondary detection device".
Preferably, the step B: the operation initialization of the train tracker specifically comprises the following steps:
when the train tracker device is started, the train tracker initializes the train identity of the train tracker segment to be 'non-determined train', and the 'non-determined train' identity indicates that the train tracker segment may contain 0, 1 or more trains.
Preferably, the step C: the train tracker filters initial train identity, specifically includes:
if the train tracker zone is configured with secondary detection equipment, the train tracker always detects the clear state of the secondary detection equipment within the non-determined train screening time to complete the identity screening of the non-determined train in the train tracker zone;
or the communication train carries out the operations of registering, running and logging off in the train tracker section, and the train tracker finishes the identity screening of the non-determined train in the train tracker section.
Preferably, the non-deterministic train screening time takes into account the following two factors:
a) triggering train emergency braking stop time at the maximum allowable running speed of the line train;
b) the maximum occupancy state detection of the "secondary detection device" is delayed.
Preferably, said step D: train VOBC registers train tracker train identity, specifically includes:
when the train VOBC calculates the movement authorization to reach the end point of the train tracker section, the train VOBC and the train tracker complete the train identity registration of the train tracker section;
or when the train VOBC can not calculate effective movement authorization, a driver drives the train to run, and when the safe train head reaches the end point of the train tracker section, the train VOBC and the train tracker complete the train identity registration of the train tracker section.
Preferably, said step E: train VOBC obtains train tracker train identity, includes:
the train 1VOBC acquires all train identities of a train tracker section from a train tracker;
the train 1VOBC acquires the identity of the downstream train 2 according to the running direction and the identity information of all trains in the train tracker section;
the train 1VOBC establishes communication with the downstream train 2VOBC to obtain the downstream train 2 position information and the movement authorization information, calculate new movement authorization and realize the train 2 tracking.
Preferably, said step F: the train VOBC logs off the train tracker train identity, comprising:
when the train leaves the train tracker section, when the distance between the train safety tail and the tail end of the train tracker section is greater than the train logout distance, the train VOBC sends a train identity logout application;
after receiving a train identity 'logout' application sent by a train VOBC, the train tracker logs out all train identity information from the applied train to the tail end of a train tracker section.
Preferably, the "train deregistration distance" takes the following factors into consideration:
a) and the maximum return sliding distance of the train is obtained.
Compared with the prior art, the invention has the following advantages:
1. the train tracker is adopted to realize the management of the train identity registered on the line, the abstraction degree of a processing mechanism is high, the train identity related operation is triggered by the train according to the actual operation requirement, the consistency of the train identity in the train tracker section and the actual operation train is ensured, the system structure is simple, the system is easy to realize, and the equipment reliability is high.
2. The train only needs to interact with the train tracker to obtain the identity of the downstream train, and other communication modes such as polling and broadcasting are not needed to obtain other train identity information, so that the network overhead of the system is reduced, and the expandability of the system is high.
3. The influence of the train with the communication loss fault on the system operation is small, the global or regional influence is avoided, and after the system equipment is in fault, the process of the system recovering to the normal operation mode is simple, the operation is easy, and the maintainability of the system is high.
Drawings
FIG. 1 is a schematic diagram of a train tracker segment;
FIG. 2 is a schematic diagram of a train tracker initialization;
FIG. 3 is a schematic diagram of a train tracker segment "no sure train" identity screening operation;
FIG. 4 is a schematic diagram of the train tracker "registration" operation;
FIG. 5 is a schematic diagram of a train VOBC obtaining a train identity of a train tracker;
FIG. 6 is a schematic view of a train tracker "logged off" operation;
fig. 7 is a schematic diagram of a train identity management process of a train tracker-based train-to-vehicle communication train control system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
The invention relates to a train identity management technology of a train-to-train communication train control system based on a train tracker, wherein a protection system comprises a train tracker of the train-to-train communication train control system and a current running train (train 1), the current running direction of the train is towards a downstream train (train 2) and a vehicle-mounted controller VOBC, the train tracker and the vehicle-mounted controller VOBC are subjected to information interaction, the vehicle-mounted controller VOBC and the vehicle-mounted controller VOBC are subjected to interaction, the protection system further comprises a train tracker section, and the train tracker section is arranged on a line track section.
The invention relates to a train identity management method of a train-to-train communication train control system based on a train tracker.
The method specifically comprises the following steps:
as shown in fig. 1, step F1001: a train tracker is arranged on a running line and train tracker sections are divided; the train tracker covers all track sections of the line, the track sections covered by the train tracker are called train tracker sections, the train tracker sections do not contain switch points, the train tracker sections can be divided into one or more sub-train tracker sections, and the train tracker sections do not require setting of secondary detection equipment.
As shown in fig. 2, step F1002: initializing the operation of a train tracker; when the train tracker is started, the train identity guiding safety side processing is carried out on all train tracker sections within the management range of the train tracker, the train identity of all train tracker sections within the management range of the train tracker is initialized to be a non-determined train identity (U), the non-determined train identity (U) indicates that the train tracker sections possibly comprise 0, 1 or a plurality of trains, and a normally running communication train cannot pass through the train tracker sections.
Step F1003: screening an initial train identity by a train tracker; the train-vehicle communication train control system can adopt various modes to realize the initial train identity screening of the train tracker, if the train tracker zone in the management range of the train tracker is provided with the secondary detection equipment, the train tracker can complete the initial train identity screening of the train tracker zone according to the occupation/clearance state of the detection secondary detection equipment. And if the train tracker always detects that the train tracker zone corresponds to the 'secondary detection equipment' in the clear state within the time (T _ Sweep _ Filter) longer than the 'undetermined train screening time', the train tracker finishes the 'undetermined train' identity screening of the train tracker zone. Wherein the non-deterministic train screening time (T _ Sweep _ Filter) satisfies the following relationship:
T_Sweep_FiLTER＝T_EB_Max_Speed+T_Max_STDE_OCC_Delay
wherein T _ EB _ Max _ Speed represents the time for triggering the emergency braking and stopping of the train at the maximum allowable running Speed of the line train; t _ Max _ STDE _ OCC _ Delay represents a "secondary detection device" maximum occupancy state detection Delay.
As shown in fig. 3, the manual communication train passes through the non-determined train identity unscreened train tracker section to complete the screening of the non-determined train identity of the train tracker section, when the safety head of the manual communication train enters the train tracker section, the manual communication train VOBC sends a registration request to the train tracker section and completes the registration operation, the manual communication train passes through the train tracker section, when the safety tail of the train leaves the train tracker section, the manual communication train VOBC sends a logout request to the train tracker section and completes the logout operation, and at this time, the train tracker completes the screening of the non-determined train identity of the train tracker section.
Step F1004: registering the train identity of a train tracker by a train VOBC (volume based on code division multiple Access); as shown in fig. 4, when the train calculates the movement authorization to reach the end point of the train tracker segment, the train VOBC sends a current train tracker segment train identity "register" request to the train tracker, and the train tracker completes the current train tracker segment train identity "register" operation.
As shown in fig. 3, when the train cannot calculate the valid movement authorization, the driver drives the train to run, when the train safe head reaches the end point of the train tracker section, the train VOBC sends a request for "registration" of the train identity of the current train tracker section to the train tracker, and the train tracker completes the operation of "registration" of the train identity of the current train tracker section.
As shown in fig. 5, step F1005: the train VOBC acquires the train identity of a train tracker; the train VOBC 1 obtains all train identities of a train tracker section from the train tracker, the train VOBC 1 obtains the identity of a downstream train 2 according to the running direction of the train 1 and all train identity information of the train tracker section, the train 1VOBC establishes communication with the downstream train 2VOBC to obtain position information and movement authorization information of the downstream train 2, and the train VOBC calculates new movement authorization to realize tracking with the train 2.
Step F1006: the train VOBC logs out the train identity of the train tracker; as shown in fig. 6, when the train leaves the train tracker segment, when the train safety train end is greater than the train cancellation distance (D _ Unregister _ Dist) from the train tracker segment end, the train VOBC sends a train tracker segment train identity "cancellation" request to the train tracker, and the train tracker completes the train identity "cancellation" operation of the current train tracker segment, for example, when other train identity information exists at the designated end after the train is cancelled in the train tracker segment, the train identity information is "cancelled" together. Wherein D _ Unregister _ Dist is more than or equal to the maximum rollback distance of the line train.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A train identity management method based on a train tracker is characterized by comprising the following steps:
step A: a train tracker is arranged on a running line and train tracker sections are divided;
and B: initializing the operation of a train tracker;
and C: screening an initial train identity by a train tracker;
step D: registering the train identity of a train tracker by a train VOBC (volume based on code division multiple Access);
step E: the train VOBC acquires the train identity of a train tracker;
step F: the train VOBC logs out the train identity of the train tracker;
the step B: the operation initialization of the train tracker specifically comprises the following steps:
when the train tracker equipment is started, the train tracker initializes the train identity of a train tracker section to be a non-determined train, wherein the non-determined train identity indicates that the train tracker section can contain 0, 1 or a plurality of trains;
the step C: the train tracker filters initial train identity, specifically includes:
if the train tracker zone is configured with secondary detection equipment, the train tracker always detects the clear state of the secondary detection equipment within the non-determined train screening time to complete the identity screening of the non-determined train in the train tracker zone;
or the communication train carries out the operations of 'registration', 'running' and 'cancellation' in the train tracker zone, and the train tracker finishes the identity screening of 'non-determined trains' in the train tracker zone;
the step D: train VOBC registers train tracker train identity, specifically includes:
when the train VOBC calculates the movement authorization to reach the end point of the train tracker section, the train VOBC and the train tracker complete the train identity registration of the train tracker section;
or when the VOBC of the train can not calculate effective movement authorization, a driver drives the train to run, and when the safe train head reaches the end point of the train tracker section, the VOBC of the train and the train tracker complete the train identity registration of the train tracker section;
the step E: train VOBC obtains train tracker train identity, includes:
the train 1VOBC acquires all train identities of a train tracker section from a train tracker;
the train 1VOBC acquires the identity of the downstream train 2 according to the running direction and the identity information of all trains in the train tracker section;
the train 1VOBC establishes communication with the downstream train 2VOBC to obtain the downstream train 2 position information and the movement authorization information, calculate new movement authorization and realize the train 2 tracking;
the train only needs to interact with the train tracker to obtain the downstream train identity, and other train identity information does not need to be obtained in a polling and broadcasting mode, so that the system network overhead is reduced, and the system expandability is high.
2. The method according to claim 1, wherein the train tracker is set in the operation route of step a to cover all track sections of the route, the track sections covered by the train tracker are called train tracker sections, and the train tracker sections do not contain switch points.
3. The method as claimed in claim 2, wherein the train tracker segment does not enforce a "secondary detection device".
4. The train identity management method based on the train tracker according to claim 1, wherein the non-deterministic train screening time is considered by the following two factors:
a) triggering train emergency braking stop time at the maximum allowable running speed of the line train;
b) the maximum occupancy state detection of the "secondary detection device" is delayed.
5. The train identity management method based on the train tracker according to claim 1, wherein the step F: the train VOBC logs off the train tracker train identity, comprising:
when the train leaves the train tracker section, when the distance between the train safety tail and the tail end of the train tracker section is greater than the train logout distance, the train VOBC sends a train identity logout application;
after receiving a train identity 'logout' application sent by a train VOBC, the train tracker logs out all train identity information from the applied train to the tail end of a train tracker section.
6. The train identity management method based on the train tracker according to claim 5, wherein the train logout distance is considered by the following factors:
a) and the maximum return sliding distance of the train is obtained.
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| CN109017881B true CN109017881B (en) | 2021-04-27 |
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| US9233696B2 (en) * | 2006-03-20 | 2016-01-12 | General Electric Company | Trip optimizer method, system and computer software code for operating a railroad train to minimize wheel and track wear |
| CN106553665B (en) * | 2016-11-29 | 2019-03-22 | 中国中车股份有限公司 | Zone controller is compatible to be handled/method of not handling route |
| CN106515797B (en) * | 2016-12-20 | 2018-04-17 | 交控科技股份有限公司 | The train tracking operation method and CBTC systems of no secondary track detection device |
| CN106985880A (en) * | 2017-02-28 | 2017-07-28 | 北京交通大学 | A kind of truck traffic management method of Train Detection and Identification |
| CN107901952B (en) * | 2017-09-26 | 2023-08-15 | 浙江浙大列车智能化工程技术研究中心有限公司 | Delay tolerant train screening algorithm |
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