Virtual marshalling overspeed protection test method, device, equipment and medium

Abstract

This invention provides a method, apparatus, equipment, and medium for overspeed protection testing under virtual train formation, relating to the field of rail transit technology. The method includes: acquiring the running data of the preceding and following trains in each operational phase of the virtual train formation; constructing a preceding train running curve based on the preceding train running data and a following train running curve based on the following train running data; inputting the preceding train running curve, the preceding train overspeed protection curve, the following train running curve, and the following train overspeed protection curve into an overspeed protection comparison model to obtain the test results of the overspeed protection test under virtual train formation; the operational phases include the formation establishment phase, the formation operation phase, the formation entering the station phase, the formation entering the station and stopping phase, the formation leaving the station phase, and the formation turnaround operation phase. This invention comprehensively verifies the overspeed protection function of the virtual train formation under each operational phase, improving the accuracy and reliability of the test, thereby effectively enhancing the safety of the virtual train formation operation process.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular to a method, apparatus, equipment and medium for overspeed protection testing under virtual train formation. Background Technology

[0002] The invention patent with authorization announcement number CN103552555B discloses a method for train safety overspeed protection and braking distance. It calculates a precise and complete runaway acceleration and braking curve, fully considering the most unfavorable situation for runaway acceleration, and provides a precise guarantee for train speed safety and safety interval. The invention patent with authorization announcement number CN112265569B discloses a method for safe operation of variable combination engineering vehicles based on signal system protection. The engineering vehicle's onboard control (CC) uses the maximum engineering vehicle formation combination length value to assist in ensuring train overspeed protection safety, and the engineering vehicle's onboard CC uses the minimum engineering vehicle formation combination length value to assist in monitoring the safety positioning status of the protection engineering vehicle, realizing safety protection for the operation of engineering vehicle formations of different lengths. It effectively solves the safety protection problem of variable combination engineering vehicle operation under signal system protection, but cannot effectively verify and test the overspeed protection function under virtual formation.

[0003] Existing testing technologies rely too heavily on laboratory simulations and modeling, which are affected by simulation models and parameter settings, resulting in certain deviations in test results. Furthermore, during the operation of virtual train formations, the speeding of the train formations may pose a potential threat to safety. Summary of the Invention

[0004] This invention provides a method, apparatus, equipment, and medium for testing overspeed protection under virtual train formation, in order to solve the current technical deficiency that it is impossible to fully test and verify the overspeed protection function under virtual train formation, thus failing to guarantee the driving safety of trains under virtual train formation.

[0005] In a first aspect, the present invention provides an overspeed protection testing method under virtual grouping, comprising:

[0006] Acquire the running data of the leading and trailing trains in each operational phase of the virtual train formation;

[0007] A preceding vehicle operation curve is constructed based on the preceding vehicle operation data, and a following vehicle operation curve is constructed based on the following vehicle operation data.

[0008] Input the preceding vehicle's running curve, the preceding vehicle's overspeed protection curve, the following vehicle's running curve, and the following vehicle's overspeed protection curve into the overspeed protection comparison model, and obtain the test results of the overspeed protection test under virtual grouping output by the overspeed protection comparison model.

[0009] The operational phases include the formation phase, the formation operation phase, the formation entering the station phase, the formation entering the station and parking phase, the formation leaving the station phase, and the formation turnaround operation phase.

[0010] The operating curve is determined based on the speed measured at preset intervals between trains.

[0011] According to the overspeed protection test method under virtual train formation provided by the present invention, the step of constructing the running curve of the preceding vehicle based on the running data of the preceding vehicle and constructing the running curve of the following vehicle based on the running data of the following vehicle includes:

[0012] The speed of each preceding vehicle measured at each preset distance interval is determined based on the preceding vehicle's running data, and the preceding vehicle's running curve is constructed based on each preceding vehicle's speed measured at each preset distance interval.

[0013] The following vehicle speed is determined based on the following vehicle's running data at each preset distance interval, and the following vehicle running curve is constructed based on the following vehicle speed at each preset distance interval.

[0014] According to the overspeed protection test method under virtual train formation provided by the present invention, the step of inputting the running curve of the preceding vehicle, the overspeed protection curve of the preceding vehicle, the running curve of the following vehicle, and the overspeed protection curve of the following vehicle into the overspeed protection comparison model, and obtaining the test results of the overspeed protection test under virtual train formation output by the overspeed protection comparison model, includes:

[0015] Input the preceding vehicle's running curve and the preceding vehicle's overspeed protection curve into the first comparison module of the overspeed protection comparison model, and obtain the preceding vehicle's overspeed protection test result output by the first comparison module;

[0016] Input the following vehicle running curve and the following vehicle overspeed protection curve into the second comparison module of the overspeed protection comparison model, and obtain the following vehicle overspeed protection test results output by the second comparison module;

[0017] Input the overspeed protection test results of the preceding vehicle and the overspeed protection test results of the following vehicle into the comparison output module of the overspeed protection comparison model, and obtain the test results of the overspeed protection test under virtual grouping output by the comparison output module.

[0018] According to the overspeed protection test method under virtual train formation provided by the present invention, the step of obtaining the overspeed protection test result of the preceding vehicle output by the first comparison module includes:

[0019] Determine the speed difference between each speed of the preceding vehicle measured at each preset distance interval and the speed preset at each preset distance interval in the preceding vehicle overspeed protection curve;

[0020] If the speed difference of all preceding vehicles is greater than the first safety margin, the preceding vehicle overspeed protection test result is passed according to the output of the first comparison module.

[0021] If the speed difference between any preceding vehicle and the preceding vehicle is less than or equal to the first safety margin, the first comparison module outputs that the preceding vehicle overspeed protection test result is failed.

[0022] According to the overspeed protection test method under virtual train formation provided by the present invention, the step of obtaining the overspeed protection test result of the rear vehicle output by the second comparison module includes:

[0023] Determine the speed difference between each following vehicle and the speed measured at each preset distance interval in the following vehicle overspeed protection curve;

[0024] If the speed difference of all following vehicles is greater than the second safety margin, the following vehicle overspeed protection test result is passed according to the output of the second comparison module.

[0025] If the speed difference between any following vehicle and the following vehicle is less than or equal to the second safety margin, the following vehicle overspeed protection test result is output as "failed" according to the second comparison module.

[0026] According to the overspeed protection test method under virtual grouping provided by the present invention, the step of obtaining the test result of the overspeed protection test under virtual grouping output by the comparison output module includes:

[0027] If the overspeed protection test result of the preceding vehicle is passed and the overspeed protection test result of the following vehicle is passed, the overspeed protection test result under virtual grouping is output as passed according to the comparison output module.

[0028] Otherwise, the test result of the overspeed protection test under virtual grouping will be "fail" according to the comparison output module.

[0029] According to the overspeed protection test method under virtual grouping provided by the present invention, after the comparison output module outputs that the test result of the overspeed protection test under virtual grouping is unsuccessful, the method further includes:

[0030] Adjust the control parameters of the overspeed protection system under the virtual grouping;

[0031] Acquire the running data of the leading and trailing cars of the virtual train in each operating phase, and output the test results of the overspeed protection test under the virtual train formation again;

[0032] The test results for overspeed protection under virtual grouping are passed until the output is displayed.

[0033] The control parameters of the overspeed protection system under virtual formation include at least the braking force of the preceding vehicle and the braking force of the following vehicle under virtual formation.

[0034] Secondly, the present invention provides an overspeed protection testing device under virtual grouping, comprising:

[0035] The acquisition unit is used to acquire the running data of the leading and trailing trains of the virtual train formation in each operating phase.

[0036] A construction unit is used to construct a preceding vehicle operation curve based on the preceding vehicle operation data and a following vehicle operation curve based on the following vehicle operation data.

[0037] The input unit is used to input the running curve of the preceding vehicle, the overspeed protection curve of the preceding vehicle, the running curve of the following vehicle, and the overspeed protection curve of the following vehicle into the overspeed protection comparison model, and to obtain the test results of the overspeed protection test under virtual grouping output by the overspeed protection comparison model.

[0038] The operational phases include the formation phase, the formation operation phase, the formation entering the station phase, the formation entering the station and parking phase, the formation leaving the station phase, and the formation turnaround operation phase.

[0039] The operating curve is determined based on the speed measured at preset intervals between trains.

[0040] Thirdly, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the aforementioned overspeed protection test method under virtual grouping.

[0041] Fourthly, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the overspeed protection test method under virtual grouping as described above.

[0042] This invention provides a method, apparatus, equipment, and medium for overspeed protection testing under virtual train formation. By acquiring the running data of the preceding and following trains in each operational phase of the virtual train formation, and constructing the running curves of the preceding and following trains, the invention inputs these curves, along with their overspeed protection curves, into an overspeed protection comparison model to obtain the test results for overspeed protection under virtual train formation. This invention enables comprehensive verification of the overspeed protection function of the virtual train formation in each operational phase on a real train line, improving the accuracy and reliability of the test, and thus effectively enhancing the safety of the virtual train formation during operation. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is one of the flowcharts of the overspeed protection test method under virtual grouping provided by the present invention;

[0045] Figure 2 This is a schematic diagram of the process for constructing and running curves provided by the present invention;

[0046] Figure 3 This is a schematic diagram of the process for obtaining test results provided by the present invention;

[0047] Figure 4 This is a schematic diagram of the grouping establishment stage provided by the present invention;

[0048] Figure 5 This is a schematic diagram of the grouping and operation phase provided by the present invention;

[0049] Figure 6 This is a schematic diagram of the train entering the station stage provided by the present invention;

[0050] Figure 7 This is a schematic diagram of a scenario where trains are entering the station and are in the parking phase, as provided by the present invention.

[0051] Figure 8 This is a schematic diagram of the marshalling and departure stage provided by the present invention;

[0052] Figure 9 This is a schematic diagram of the grouping and turnaround operation stage provided by the present invention;

[0053] Figure 10 This is the second flowchart of the overspeed protection test method under virtual grouping provided by the present invention;

[0054] Figure 11 This is a schematic diagram of the overspeed protection test device under virtual grouping provided by the present invention;

[0055] Figure 12 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0057] The main principle of urban rail train virtual formation technology is to set two trains together as a single operating unit, achieving coordinated control and protection between the trains in the formation. This flexible train formation method saves on the costs associated with adjusting subway operating capacity. However, during the operation of virtual train formations, speeding issues may pose a potential threat to safety. Currently, research on testing methods and devices for overspeed protection functions of virtual train formations operating on real lines is relatively limited.

[0058] However, existing technologies rely too heavily on laboratory simulations, which are affected by simulation models and parameter settings, leading to certain deviations in test results. Furthermore, they cannot provide real-world data testing of the overspeed protection function of virtual train formations during actual line operation, making it impossible to assess the effectiveness and stability of the overspeed protection function. There is also a lack of testing methods and devices for the overspeed protection function throughout the entire process of virtual train formations, making it impossible to comprehensively verify the overspeed protection function at each stage, including formation setup, formation section operation, formation entry, formation stopping, formation exit, and formation turnaround. Based on these technical problems, this invention provides an overspeed protection testing method, device, equipment, and medium for virtual train formations. Figure 1 This is one of the flowcharts illustrating the overspeed protection testing method under virtual grouping provided by the present invention. The overspeed protection testing method under virtual grouping includes:

[0059] Step 101: Obtain the running data of the leading and trailing cars of the virtual train in each operating phase;

[0060] Step 102: Construct the running curve of the preceding vehicle based on the preceding vehicle's running data, and construct the running curve of the following vehicle based on the following vehicle's running data;

[0061] Step 103: Input the running curve of the preceding vehicle, the overspeed protection curve of the preceding vehicle, the running curve of the following vehicle, and the overspeed protection curve of the following vehicle into the overspeed protection comparison model, and obtain the test results of the overspeed protection test under virtual grouping output by the overspeed protection comparison model.

[0062] The operational phases include the formation phase, the formation operation phase, the formation entering the station phase, the formation entering the station and parking phase, the formation leaving the station phase, and the formation turnaround operation phase.

[0063] The operating curve is determined based on the speed measured at preset intervals between trains.

[0064] In step 101, the operation phase includes a train formation establishment phase, a train formation operation phase, a train formation entering the station phase, a train formation entering the station and in a parking phase, a train formation leaving the station phase, and a train formation turnaround operation phase. Specifically, for the train formation establishment phase, the operation data of the preceding and following trains are acquired; for the train formation operation phase, the operation data of the preceding and following trains are acquired; for the train formation entering the station phase, the operation data of the preceding and following trains are acquired; for the train formation entering the station and in a parking phase, the operation data of the preceding and following trains are acquired; for the train formation leaving the station phase, the operation data of the preceding and following trains are acquired; and for the train formation turnaround operation phase, the operation data of the preceding and following trains are acquired.

[0065] Optionally, the virtual train formation shown in this invention includes a virtual train front and a virtual train rear, which can comprehensively verify the overspeed protection test of the virtual train front and virtual train rear in different scenarios. Through real operating scenarios and accurately collected train operation data, the effectiveness and stability of the overspeed protection test can be evaluated, thereby improving the accuracy and reliability of the test.

[0066] Figure 4 This is a schematic diagram of the grouping establishment stage provided by the present invention, such as... Figure 4 As shown, the train unit operates in the southbound section between station 3 and station 2, completing the formation and operation of the train. Figure 5 This is a schematic diagram of the grouping and operation phase provided by the present invention, such as... Figure 5 As shown, the assembled train runs in the southbound section between station 3 and station 2. Figure 6 This is a schematic diagram of the scene during the train entering the station provided by the present invention, such as... Figure 6 As shown, the assembled train runs in the down-line section between station 3 and station 2. When the front locomotive of the assembled train enters the platform track, the assembled train enters the station entry stage. Figure 7 This is a schematic diagram of a scenario provided by the present invention where trains are entering the station and are in the parking phase, as shown in the figure. Figure 7 As shown, the train is entering the station and has entered the parking phase. When the train is entering the station and the speed of the preceding train is less than 10 km / h, the train is in the parking phase. Figure 8 This is a schematic diagram of the scene during the departure phase of the marshalling yard provided by the present invention, such as... Figure 8As shown, after the train enters the station and completes platform operations, the train departs from the platform. The train is in the departure phase when the preceding car leaves the station and crosses the platform rails. Figure 9 This is a schematic diagram of a scenario during the grouping and turnaround operation phase provided by the present invention, such as... Figure 9 As shown, the train runs from the section to the turnaround track and completes automatic end changing. The train is in the formation turnaround operation phase. This invention comprehensively verifies the overspeed protection by designing virtual train actual operation scenarios, including: formation establishment phase, formation operation phase, formation entering the station phase, formation stopping phase, formation leaving the station phase, and formation turnaround operation phase.

[0067] This invention covers all stages, including the formation stage, the operation stage between formation sections, the entry stage of formation into the station, the entry and parking stage of formation into the station, the exit stage of formation into the station, and the turnaround stage of formation. It can detect potential speeding hazards at different stages and provide comprehensive protection for improving the operational safety of virtual formation of urban rail trains.

[0068] In step 102, a forward vehicle running curve is constructed based on the forward vehicle running data, and a backward vehicle running curve is constructed based on the backward vehicle running data. The forward vehicle running data includes parameters such as speed, position, and acceleration of the forward vehicle during operation, and the backward vehicle running data includes parameters such as speed, position, and acceleration of the backward vehicle during operation. This invention performs real-time analysis and processing of the collected running data, extracts key information, determines the forward vehicle running curve based on the speed measured at preset intervals of the forward vehicle, and determines the backward vehicle running curve based on the speed measured at preset intervals of the backward vehicle.

[0069] In step 103, the preceding train's running curve, the preceding train's overspeed protection curve, the following train's running curve, and the following train's overspeed protection curve are input into the overspeed protection comparison model. The test results of the overspeed protection test under virtual train formation, output by the overspeed protection comparison model, are obtained. The preceding train's overspeed protection curve and the following train's overspeed protection curve are preset to ensure that the train does not exceed the speed limit. They are also determined based on the speed measured at each preset distance. By inputting the preceding train's running curve, the preceding train's overspeed protection curve, the following train's running curve, and the following train's overspeed protection curve into the overspeed protection comparison model, the preceding train's running curve is compared with the preceding train's overspeed protection curve, and the following train's running curve is compared with the following train's overspeed protection curve. The differences between the two sets of curves are analyzed, thereby obtaining the test results of the overspeed protection test under virtual train formation, output by the overspeed protection comparison model.

[0070] Optionally, for any operating phase, output the test results under the current operating phase, traverse all operating phases, output all test results, and determine the final test results of the overspeed protection test under the virtual grouping based on all the measured test results.

[0071] Optionally, before acquiring the running data of the preceding and following trains of the virtual train formation in each operating stage, the method further includes acquiring initial data of the preceding and following trains; for the initial data of the preceding and following trains in each operating stage, cleaning the initial data of the preceding and following trains, filtering out the first running data of the preceding train and the first running data of the following train, performing time-series adjustment on the first running data of the preceding train and the first running data of the following train, and acquiring the second running data of the preceding and the second running data of the following train; performing a timestamp alignment operation on the second running data of the preceding and the second running data of the following train to acquire the running data of the preceding and following trains of the virtual train formation.

[0072] Optionally, this invention collects initial data from the leading and trailing trains of a virtual train formation in real time, and preprocesses this data. The preprocessing includes data cleaning, timing adjustment, and timestamp alignment. This preprocessing ensures the accuracy and usability of the data. Finally, based on the preprocessed data, feature extraction and analysis are performed to output test results. This invention can effectively evaluate the overspeed protection function of virtual train formations and provide accurate test results.

[0073] This invention addresses the current lack of testing methods and devices for overspeed protection in virtual train formations by providing a method capable of testing and verifying the overspeed protection function throughout the entire operation of virtual train formations in urban rail transit. By collecting and analyzing train operation data, the method generates speed and emergency braking curves for the train formations, with the emergency braking curve serving as the overspeed protection curve. The method then outputs the test results, thereby improving the operational safety of virtual train formations and providing a reliable testing and verification method for the development and application of virtual train formation technology in urban rail transit.

[0074] This invention provides a method, apparatus, equipment, and medium for overspeed protection testing under virtual train formation. By acquiring the running data of the preceding and following trains in each operational phase of the virtual train formation, and constructing the running curves of the preceding and following trains, the invention inputs these curves, along with their overspeed protection curves, into an overspeed protection comparison model to obtain the test results for overspeed protection under virtual train formation. This invention enables comprehensive verification of the overspeed protection function of the virtual train formation in each operational phase on a real train line, improving the accuracy and reliability of the test, and thus effectively enhancing the safety of the virtual train formation during operation.

[0075] Figure 2 This is a flowchart illustrating the construction of operating curves provided by the present invention. The step of constructing the operating curve of the preceding vehicle based on the preceding vehicle's operating data, and constructing the operating curve of the following vehicle based on the following vehicle's operating data, includes:

[0076] Step 201: Determine the speed of each preceding vehicle measured at each preset distance interval based on the preceding vehicle's running data, and construct the preceding vehicle's running curve based on each preceding vehicle speed measured at each preset distance interval;

[0077] Step 202: Determine the speed of each rear vehicle measured at each preset distance interval based on the rear vehicle's running data, and construct the rear vehicle's running curve based on each rear vehicle speed measured at each preset distance interval.

[0078] In step 201, the present invention obtains the speed and position of the preceding vehicle by means of a test device set on the preceding vehicle. The preset distance can be 1 centimeter, 1 meter or 10 meters, that is, the speed of the current preceding vehicle is measured once at a certain distance, and the running curve of the preceding vehicle is established with the traveling distance of the preceding vehicle as the horizontal axis and the speed measured by the traveling distance as the vertical axis.

[0079] In step 202, the present invention obtains the speed and position of the following vehicle through a testing device installed on the following vehicle. The preset distance can be 1 centimeter, 1 meter or 10 meters, that is, the speed of the following vehicle is measured at regular intervals. The following vehicle's running curve is established with the distance traveled by the following vehicle as the horizontal axis and the speed measured over the distance traveled as the vertical axis. The smaller the preset distance is set, the more refined the running curve reflected by the curve. The present invention does not impose any limitations on the construction of the running curve and can be processed according to actual needs.

[0080] This invention uses the collected data to generate speed curves and emergency braking curves for train formations. These curves can intuitively show the operation of the train formations at various stages, especially overspeeding and emergency braking situations.

[0081] This invention, by constructing the running curves of the preceding and following trains, intuitively reflects the overspeed protection function at a macroscopic level under virtual train formation. Based on the train operation data acquired during the operation phase, this invention can provide accurate test results, accurately collect and analyze train operation data, and generate speed curves for testing. This provides an objective assessment of the performance and optimization direction of the overspeed protection function for subsequent test result analysis, and provides guidance for the improvement of urban rail train virtual train formation technology.

[0082] Figure 3 This is a flowchart illustrating the process of obtaining test results provided by the present invention. The process involves inputting the preceding vehicle's operating curve, the preceding vehicle's overspeed protection curve, the following vehicle's operating curve, and the following vehicle's overspeed protection curve into an overspeed protection comparison model, and obtaining the test results of the overspeed protection test under virtual formation, output by the overspeed protection comparison model. This includes:

[0083] Step 301: Input the preceding vehicle's running curve and the preceding vehicle's overspeed protection curve into the first comparison module of the overspeed protection comparison model, and obtain the preceding vehicle's overspeed protection test result output by the first comparison module;

[0084] Step 302: Input the following vehicle running curve and the following vehicle overspeed protection curve into the second comparison module of the overspeed protection comparison model, and obtain the following vehicle overspeed protection test results output by the second comparison module;

[0085] Step 303: Input the overspeed protection test results of the preceding vehicle and the overspeed protection test results of the following vehicle into the comparison output module of the overspeed protection comparison model, and obtain the test results of the overspeed protection test under virtual grouping output by the comparison output module.

[0086] In step 301, the overspeed protection of the vehicle in front is tested and verified. Optionally, obtaining the overspeed protection test result of the vehicle in front output by the first comparison module includes:

[0087] Determine the speed difference between each speed of the preceding vehicle measured at each preset distance interval and the speed preset at each preset distance interval in the preceding vehicle overspeed protection curve;

[0088] If the speed difference of all preceding vehicles is greater than the first safety margin, the preceding vehicle overspeed protection test result is passed according to the output of the first comparison module.

[0089] If the speed difference between any preceding vehicle and the preceding vehicle is less than or equal to the first safety margin, the first comparison module outputs that the preceding vehicle overspeed protection test result is failed.

[0090] Optionally, the preceding vehicle running curve and the preceding vehicle overspeed protection curve can be adjusted to the same curve scale, including but not limited to adjusting the measurement units in the horizontal axis direction and the vertical axis direction of the preceding vehicle overspeed protection curve to be consistent with the measurement units of the preceding vehicle running curve.

[0091] Furthermore, the preset distance can be 250 meters, that is, every 250 meters on the horizontal axis of the running curve, the speed in the vertical direction of the preceding vehicle's running curve is taken, and the speed in the vertical direction of the preceding vehicle's overspeed protection curve is taken. For example, every 250 meters, the speed of the preceding vehicle's running curve is taken as 40km / h, 60km / h, 50km / h and 30km / h, and the speed of the preceding vehicle's overspeed protection curve is taken as 40.5km / h, 66km / h, 55km / h and 36km / h.

[0092] Optionally, the speed difference between each speed of the preceding vehicle measured at each preset distance interval and the speed preset at each preset distance interval in the preceding vehicle overspeed protection curve is determined to be 0.5 km / h, 6 km / h, 5 km / h and 6 km / h respectively.

[0093] Optionally, if the first safety margin is 1 km / h, then when the speed difference between the preceding vehicle and the preceding vehicle is 0.5 km / h, the first comparison module outputs that the preceding vehicle overspeed protection test result is failed.

[0094] Optionally, if the first safety margin is 0.3 km / h, then all speed differences of the preceding vehicles are greater than the first safety margin of 0.3 km / h, and the preceding vehicle overspeed protection test result is passed according to the output of the first comparison module. The first safety margin can be set according to actual needs, which will not be elaborated here.

[0095] Optionally, to improve the reliability of the overspeed protection test under the virtual grouping, the preset distance can be set as small as possible. Only when the speed difference of any preceding vehicle is greater than the first safety margin will the overspeed protection test result of the preceding vehicle be output as passed. In an optional embodiment, it is necessary to ensure that the running curve of the preceding vehicle is below the overspeed protection curve of the preceding vehicle, and the speed difference of the preceding vehicle corresponding to the point where the running curve of the preceding vehicle is closest to the overspeed protection curve of the preceding vehicle must also be greater than the first safety margin.

[0096] This invention can quickly test and verify the overspeed protection of virtual train formations in urban rail transit. Compared with traditional laboratory simulations, the overspeed protection test results of the preceding train can be tested on-site in actual operating scenarios, saving time and costs and improving testing efficiency.

[0097] In step 302, the overspeed protection of the rear vehicle is tested and verified. Optionally, obtaining the overspeed protection test result of the rear vehicle output by the second comparison module includes:

[0098] Determine the speed difference between each following vehicle and the speed measured at each preset distance interval in the following vehicle overspeed protection curve;

[0099] If the speed difference of all following vehicles is greater than the second safety margin, the following vehicle overspeed protection test result is passed according to the output of the second comparison module.

[0100] If the speed difference between any following vehicle and the following vehicle is less than or equal to the second safety margin, the following vehicle overspeed protection test result is output as "failed" according to the second comparison module.

[0101] Optionally, the following vehicle running curve and the following vehicle overspeed protection curve can be adjusted to the same curve scale, including but not limited to adjusting the measurement units in the horizontal axis direction and the vertical axis direction of the following vehicle overspeed protection curve to be consistent with the measurement units of the following vehicle running curve.

[0102] Furthermore, the preset distance can be 0.1 meters, 1 meter, or 250 meters, etc. That is, every 250 meters on the horizontal axis of the running curve, the speed in the vertical direction of the following vehicle's running curve is taken, and the speed in the vertical direction of the following vehicle's overspeed protection curve is taken. For example, every 250 meters, the speed of the following vehicle's running curve is obtained as 35 km / h, 58 km / h, 43 km / h, and 25 km / h, and the speed of the following vehicle's overspeed protection curve is obtained as 36.2 km / h, 60 km / h, 48 km / h, and 66 km / h.

[0103] Optionally, the speed difference between each preceding vehicle and the speed at each preset interval in the preceding vehicle overspeed protection curve is determined to be 1.2 km / h, 2 km / h, 5 km / h and 41 km / h.

[0104] Optionally, if the second safety margin is 1 km / h, then all speed differences of the preceding vehicles are greater than the first safety margin of 0.3 km / h, and the preceding vehicle overspeed protection test result is passed according to the output of the first comparison module.

[0105] Optionally, if the second safety margin is 1.5 km / h, then when the speed difference of the following vehicle is 1.2 km / h, it is determined that the speed difference of the following vehicle is less than the second safety margin. If the speed difference of the following vehicle is less than 1.2 km / h, it is considered that the current speed of the following vehicle is very close to the reference speed of the overtaking protection curve at the corresponding position, and it is considered that the following vehicle has an overtaking risk. That is, according to the output of the second comparison module, the overspeed protection test result of the following vehicle is failed. The second safety margin can be set according to actual needs, which will not be elaborated here.

[0106] Optionally, to improve the reliability of the overspeed protection test under the virtual grouping, the preset distance can be set as small as possible. Only when the speed difference of any following vehicle is greater than the second safety margin will the overspeed protection test result of the following vehicle be output as passed. In an optional embodiment, it is necessary to ensure that the running curve of the following vehicle is below the overspeed protection curve of the following vehicle, and the speed difference of the following vehicle corresponding to the point where the running curve of the following vehicle is closest to the overspeed protection curve of the following vehicle must also be greater than the second safety margin.

[0107] This invention can quickly test and verify the overspeed protection of virtual train formations in urban rail transit. Compared with traditional laboratory simulations, the overspeed protection test results of the rear train can be tested on-site in actual operating scenarios, saving time and costs and improving testing efficiency.

[0108] In step 303, obtaining the test results of the overspeed protection test under virtual grouping output by the comparison output module includes:

[0109] If the overspeed protection test result of the preceding vehicle is passed and the overspeed protection test result of the following vehicle is passed, the overspeed protection test result under virtual grouping is output as passed according to the comparison output module.

[0110] Otherwise, the test result of the overspeed protection test under virtual grouping will be "fail" according to the comparison output module.

[0111] Optionally, if the overspeed protection test result of the preceding vehicle is passed and the overspeed protection test result of the following vehicle is passed, then the comprehensive testing and verification of the overspeed protection function is considered to ensure the effectiveness and stability of the overspeed protection function in actual operation, and the test result of the overspeed protection test under virtual grouping is passed according to the comparison output module.

[0112] If the speeding protection test result of the preceding vehicle is "failed" and the speeding protection test result of the following vehicle is "passed", then the comparison output module outputs the speeding protection test result under virtual formation as "failed". If the speeding protection test result of the preceding vehicle is "passed" and the speeding protection test result of the following vehicle is "failed", then the comparison output module outputs the speeding protection test result under virtual formation as "failed". If the speeding protection test result of the preceding vehicle is "failed" and the speeding protection test result of the following vehicle is "failed", then the comparison output module outputs the speeding protection test result under virtual formation as "failed".

[0113] This invention outputs the test results of overspeed protection test under virtual train formation according to the comparison output module, providing a reliable means for testing and verifying the overspeed protection function under virtual train formation of urban rail transit. Through testing in actual operation scenarios, the operating status and interaction of train formation can be simulated more realistically and accurately, ensuring the accuracy and reliability of the test results.

[0114] This invention aims to address the current lack of testing methods and tools for overspeed protection functions in the field of virtual train formation technology for urban rail transit. By inputting the preceding train's running curve, the preceding train's overspeed protection curve, the following train's running curve, and the following train's overspeed protection curve into an overspeed protection comparison model, and obtaining the test results of the overspeed protection test under virtual formation output by the overspeed protection comparison model, this invention can improve the application level of virtual train formation technology for urban rail transit. Through comprehensive testing and verification of the overspeed protection function, the effectiveness and stability of the overspeed protection function in actual operation can be ensured, thereby ensuring train operation safety.

[0115] Optionally, after the comparison output module outputs a test result of "fail" for the overspeed protection test under virtual grouping, the method further includes:

[0116] Adjust the control parameters of the overspeed protection system under the virtual grouping;

[0117] Acquire the running data of the leading and trailing cars of the virtual train in each operating phase, and output the test results of the overspeed protection test under the virtual train formation again;

[0118] The test results for overspeed protection under virtual grouping are passed until the output is displayed.

[0119] The control parameters of the overspeed protection system under virtual formation include at least the braking force of the preceding vehicle and the braking force of the following vehicle under virtual formation.

[0120] After the comparison output module outputs a test result of "fail" for the overspeed protection test under virtual train formation, this invention identifies problems and shortcomings in the overspeed protection system. By adjusting the control parameters of the overspeed protection system under virtual train formation, which include at least the braking force of the preceding and following trains in the virtual train formation, and after adjusting these parameters, the operating data of the preceding and following trains in the virtual train formation are used again at different operating stages to output the test result for the overspeed protection test under virtual train formation again. If the output test result is "fail," the control parameters of the overspeed protection system under virtual train formation are adjusted again; if the output test result is "pass," the adjustment is stopped.

[0121] This invention addresses the limitations and shortcomings of existing technologies in testing the overspeed protection function of virtual train formations. By collecting and analyzing real train operation data, it generates speed curves and overtaking protection curves for the train formations, which can intuitively display overspeed issues and emergency braking situations. This facilitates analysis and evaluation by test personnel, and outputs test results after comparison. By verifying the overspeed protection function of the preceding and following trains during the entire operation of the virtual train formation, the safety of the virtual train formation operation is effectively improved, and the accuracy and reliability of the test are enhanced. This invention can quickly and accurately verify the overspeed protection function of urban rail trains during virtual operation, and improve the application level of virtual train formation technology.

[0122] Figure 10 This is the second flowchart of the overspeed protection test method under virtual grouping provided by the present invention, as shown below. Figure 10 As shown, the present invention first designs and describes the formation operation scenario, designs the actual operation scenario of the virtual formation train, and sets the test scenario and stages, including: formation establishment stage, formation operation stage, formation entering the station stage, formation stopping stage, formation leaving the station stage, and formation turnaround operation stage. Then, a test device is set up, which includes the following modules and functions: data acquisition module, data analysis module, curve generation module, and test result output module.

[0123] Optionally, the data acquisition module is used to collect and preprocess train operation data, and the data analysis module is used to receive the train operation data from the data acquisition module, and after data filtering, determine the data of the train before and after the train in the formation. After data judgment, determine the speed curve data and overspeed protection curve data corresponding to the train before and after the train. In the curve generation module, based on the speed curve data and overspeed protection curve data corresponding to the train before and after the train, curves are generated. The test result output module outputs the test results, which include the test results of the train before and after the train in the formation.

[0124] Optionally, the present invention connects the testing device to the recording board of the virtual train's onboard equipment, ensuring that the testing device can normally receive the actual operating data sent by the onboard equipment. Further, the train is started, and tests are conducted sequentially according to each operating stage in the test scenario, causing the train to enter virtual train formation mode and sequentially run through the formation establishment stage, formation operation stage, formation entering the station stage, formation entering the station and stopping stage, formation leaving the station stage, and formation turnaround operation stage. The testing device collects test data, performs real-time analysis and processing of the collected data, and uses a curve generation module to generate the actual operating speed curve and overspeed protection curve of the train. The testing device analyzes the validity of the curve data and automatically outputs the test results.

[0125] This invention provides a testing method and device for overspeed protection function of virtual train formations in urban rail transit based on real data acquisition and curve generation. Unlike existing methods that rely on laboratory simulation, this invention collects real operating data of virtual train formations and conducts tests and verifications in conjunction with actual lines and operating scenarios, generating result curves. This makes the test results more realistic and reliable, effectively overcoming the influence of simulation models and parameter settings, and improving test accuracy. Furthermore, this invention uses a test result output module to output test results for analysis and evaluation, facilitating testers to judge the effectiveness and stability of the overspeed protection function. This makes the testing process more visual and intuitive, improving testing efficiency and operability.

[0126] In summary, the present invention, based on real data testing methods, curve generation and test result output, and full-process overspeed protection function verification, makes the testing more accurate and reliable, provides visualized and intuitive test results, and ensures comprehensive testing and evaluation, thereby effectively improving the operational safety of virtual train formations.

[0127] Figure 11This is a schematic diagram of the overspeed protection test device under virtual train formation provided by the present invention. The device includes an acquisition unit 1, which is used to acquire the running data of the front train and the running data of the rear train in each running stage of the virtual train formation. The working principle of the acquisition unit 1 can be referred to the aforementioned step 101, and will not be repeated here.

[0128] The virtual train formation overspeed protection test device also includes a construction unit 2, which is used to construct the running curve of the preceding vehicle based on the running data of the preceding vehicle and the running curve of the following vehicle based on the running data of the following vehicle. The working principle of the construction unit 2 can be referred to the aforementioned step 102, and will not be repeated here.

[0129] The virtual train formation overspeed protection test device also includes an input unit 3, which is used to input the running curve of the preceding vehicle, the overspeed protection curve of the preceding vehicle, the running curve of the following vehicle, and the overspeed protection curve of the following vehicle into the overspeed protection comparison model, and obtain the test results of the virtual train formation overspeed protection test output by the overspeed protection comparison model. The working principle of the input unit 3 can be referred to the aforementioned step 103, and will not be repeated here.

[0130] The operational phases include the formation phase, the formation operation phase, the formation entering the station phase, the formation entering the station and parking phase, the formation leaving the station phase, and the formation turnaround operation phase.

[0131] The operating curve is determined based on the speed measured at preset intervals between trains.

[0132] This invention provides a method, apparatus, equipment, and medium for overspeed protection testing under virtual train formation. By acquiring the running data of the preceding and following trains in each operational phase of the virtual train formation, and constructing the running curves of the preceding and following trains, the invention inputs these curves, along with their overspeed protection curves, into an overspeed protection comparison model to obtain the test results for overspeed protection under virtual train formation. This invention enables comprehensive verification of the overspeed protection function of the virtual train formation in each operational phase on a real train line, improving the accuracy and reliability of the test, and thus effectively enhancing the safety of the virtual train formation during operation.

[0133] Figure 12 This is a schematic diagram of the structure of the electronic device provided by the present invention. For example... Figure 12As shown, the electronic device may include: a processor 110, a communication interface 120, a memory 130, and a communication bus 140, wherein the processor 110, the communication interface 120, and the memory 130 communicate with each other through the communication bus 140. The processor 110 can call logic instructions in the memory 130 to execute a virtual train formation overspeed protection test method. This method includes: acquiring the running data of the preceding and following trains in each operating stage; constructing a preceding train running curve based on the preceding train running data and a following train running curve based on the following train running data; inputting the preceding train running curve, the preceding train overspeed protection curve, the following train running curve, and the following train overspeed protection curve into an overspeed protection comparison model; and acquiring the test results of the virtual train formation overspeed protection test output by the overspeed protection comparison model. The operating stages include a train formation establishment stage, a train formation operation stage, a train formation entering the station stage, a train formation entering the station and stopping stage, a train formation leaving the station stage, and a train formation turnaround operation stage. The running curves are determined based on the speed measured at preset intervals between trains.

[0134] Furthermore, the logical instructions in the aforementioned memory 130 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0135] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute a virtual train formation overspeed protection test method provided by the above methods. The method includes: acquiring the running data of the preceding train and the following train in each running stage; constructing the preceding train running curve based on the preceding train running data and the following train running curve based on the following train running data; inputting the preceding train running curve, the preceding train overspeed protection curve, the following train running curve, and the following train overspeed protection curve into an overspeed protection comparison model, and acquiring the test results of the virtual train formation overspeed protection test output by the overspeed protection comparison model; the running stages include the formation establishment stage, the formation running stage, the formation entering the station stage, the formation entering the station and stopping stage, the formation leaving the station stage, and the formation turnaround operation stage; the running curve is determined based on the speed measured at each preset distance of the train interval.

[0136] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the overspeed protection test method under virtual train formation provided by the above methods. This method includes: acquiring the running data of the preceding and following trains in each operating phase; constructing a preceding train running curve based on the preceding train running data, and constructing a following train running curve based on the following train running data; inputting the preceding train running curve, the preceding train overspeed protection curve, the following train running curve, and the following train overspeed protection curve into an overspeed protection comparison model, and acquiring the test results of the overspeed protection test under virtual train formation output by the overspeed protection comparison model; the operating phases include a train formation establishment phase, a train formation operation phase, a train formation entering a station phase, a train formation entering a station and stopping phase, a train formation leaving a station phase, and a train formation turnaround operation phase; the running curves are determined based on the speed measured at preset intervals between trains.

[0137] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0138] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for overspeed protection testing under virtual grouping, characterized in that, include: Acquire the running data of the leading and trailing trains in each operational phase of the virtual train formation; A preceding vehicle operation curve is constructed based on the preceding vehicle operation data, and a following vehicle operation curve is constructed based on the following vehicle operation data. Input the preceding vehicle's running curve, the preceding vehicle's overspeed protection curve, the following vehicle's running curve, and the following vehicle's overspeed protection curve into the overspeed protection comparison model, and obtain the test results of the overspeed protection test under virtual grouping output by the overspeed protection comparison model. The operational phases include the formation phase, the formation operation phase, the formation entering the station phase, the formation entering the station and parking phase, the formation leaving the station phase, and the formation turnaround operation phase. The operating curve is determined based on the speed measured at preset intervals of the train; The process involves inputting the preceding vehicle's operating curve, the preceding vehicle's overspeed protection curve, the following vehicle's operating curve, and the following vehicle's overspeed protection curve into the overspeed protection comparison model, and obtaining the test results of the overspeed protection test under virtual grouping, as output by the overspeed protection comparison model. These results include: Input the preceding vehicle's running curve and the preceding vehicle's overspeed protection curve into the first comparison module of the overspeed protection comparison model, and obtain the preceding vehicle's overspeed protection test result output by the first comparison module; Input the following vehicle running curve and the following vehicle overspeed protection curve into the second comparison module of the overspeed protection comparison model, and obtain the following vehicle overspeed protection test results output by the second comparison module; Input the overspeed protection test results of the preceding vehicle and the overspeed protection test results of the following vehicle into the comparison output module of the overspeed protection comparison model, and obtain the test results of the overspeed protection test under virtual grouping output by the comparison output module.

2. The overspeed protection test method under virtual grouping according to claim 1, characterized in that, The step of constructing the preceding vehicle's operating curve based on the preceding vehicle's operating data and constructing the following vehicle's operating curve based on the following vehicle's operating data includes: The speed of each preceding vehicle measured at each preset distance interval is determined based on the preceding vehicle's running data, and the preceding vehicle's running curve is constructed based on each preceding vehicle's speed measured at each preset distance interval. The following vehicle speed is determined based on the following vehicle's running data at each preset distance interval, and the following vehicle running curve is constructed based on the following vehicle speed at each preset distance interval.

3. The overspeed protection test method under virtual grouping according to claim 1, characterized in that, The step of obtaining the overspeed protection test result of the vehicle ahead output by the first comparison module includes: Determine the speed difference between each speed of the preceding vehicle measured at each preset distance interval and the speed preset at each preset distance interval in the preceding vehicle overspeed protection curve; If the speed difference of all preceding vehicles is greater than the first safety margin, the preceding vehicle overspeed protection test result is passed according to the output of the first comparison module. If the speed difference between any preceding vehicle and the preceding vehicle is less than or equal to the first safety margin, the first comparison module outputs that the preceding vehicle overspeed protection test result is failed.

4. The overspeed protection test method under virtual grouping according to claim 1, characterized in that, The step of obtaining the overspeed protection test result of the rear vehicle output by the second comparison module includes: Determine the speed difference between each following vehicle and the speed measured at each preset distance interval in the following vehicle overspeed protection curve; If the speed difference of all following vehicles is greater than the second safety margin, the following vehicle overspeed protection test result is passed according to the output of the second comparison module. If the speed difference between any following vehicle and the following vehicle is less than or equal to the second safety margin, the following vehicle overspeed protection test result is output as "failed" according to the second comparison module.

5. The overspeed protection test method under virtual grouping according to claim 1, characterized in that, The process of obtaining the test results of the overspeed protection test under virtual grouping output by the comparison output module includes: If the overspeed protection test result of the preceding vehicle is passed and the overspeed protection test result of the following vehicle is passed, the overspeed protection test result under virtual grouping is output as passed according to the comparison output module. Otherwise, the test result of the overspeed protection test under virtual grouping will be "fail" according to the comparison output module.

6. The overspeed protection test method under virtual grouping according to claim 5, characterized in that, After the comparison output module outputs a test result of "fail" for the overspeed protection test under virtual grouping, the method further includes: Adjust the control parameters of the overspeed protection system under the virtual grouping; Acquire the running data of the leading and trailing cars of the virtual train in each operating phase, and output the test results of the overspeed protection test under the virtual train formation again; The test results for overspeed protection under virtual grouping are passed until the output is displayed. The control parameters of the overspeed protection system under virtual formation include at least the braking force of the preceding vehicle and the braking force of the following vehicle under virtual formation.

7. A virtual train formation overspeed protection testing device, characterized in that, include: The acquisition unit is used to acquire the running data of the leading and trailing trains of the virtual train formation in each operating phase. A construction unit is used to construct a preceding vehicle operation curve based on the preceding vehicle operation data and a following vehicle operation curve based on the following vehicle operation data. The input unit is used to input the running curve of the preceding vehicle, the overspeed protection curve of the preceding vehicle, the running curve of the following vehicle, and the overspeed protection curve of the following vehicle into the overspeed protection comparison model, and to obtain the test results of the overspeed protection test under virtual grouping output by the overspeed protection comparison model. The operational phases include the formation phase, the formation operation phase, the formation entering the station phase, the formation entering the station and parking phase, the formation leaving the station phase, and the formation turnaround operation phase. The operating curve is determined based on the speed measured at preset intervals of the train; The input unit is specifically used for: Input the preceding vehicle's running curve and the preceding vehicle's overspeed protection curve into the first comparison module of the overspeed protection comparison model, and obtain the preceding vehicle's overspeed protection test result output by the first comparison module; Input the following vehicle running curve and the following vehicle overspeed protection curve into the second comparison module of the overspeed protection comparison model, and obtain the following vehicle overspeed protection test results output by the second comparison module; Input the overspeed protection test results of the preceding vehicle and the overspeed protection test results of the following vehicle into the comparison output module of the overspeed protection comparison model, and obtain the test results of the overspeed protection test under virtual grouping output by the comparison output module.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the overspeed protection test method under virtual grouping as described in any one of claims 1-6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the overspeed protection test method under virtual grouping as described in any one of claims 1-6.

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