Virtual marshalling train impact rate test method, device, equipment and medium

Abstract

This invention provides a method, apparatus, equipment, and medium for testing the impact rate of virtual train formations, relating to the field of rail transit technology. The method includes: acquiring the running data of the preceding and following trains during the operation of the virtual train formation; determining a target preceding train impact rate based on the speed information of the preceding train in the preceding train's running data; determining a target following train impact rate based on the speed information of the following train in the following train's running data; and outputting the impact rate test result of the virtual train formation based on the target preceding and following train impact rates. This invention, by testing the impact rate of virtual train formations, ensures the operational safety of the virtual train formations during operation, improves user comfort, and reduces the risk of accidents.

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 testing the impact rate of virtual train formations. Background Technology

[0002] Patent application CN 113525461 A describes a technical solution for dynamic train formation and deformation, which establishes a functional relationship between train spacing and train speed based on the operating status of trains in front and behind within the formation, and uses the calculated dynamic safe operating distance under the worst-case scenario as the control target. Another example is patent application CN107933618 A, which describes a method where, when the speed measuring unit at the front of the train malfunctions while the speed measuring unit at the rear is normal, the rear of the train performs acceleration smoothing processing based on the historical periodic data of the speed measuring unit at the rear within a preset time period, obtains the historical average acceleration and historical average impact rate of the rear of the train, and sends them to the front of the train.

[0003] In traditional urban rail trains, impact rate tests are usually conducted on individual trains. However, in virtual train formations, the impact rate cannot be tested, which means that the safety of the train during operation cannot be effectively guaranteed. Summary of the Invention

[0004] This invention provides a method, apparatus, equipment, and medium for testing the impact rate of virtual train formations, thereby addressing the technical deficiency of being unable to test the impact rate in virtual train formations, which leads to lower train safety.

[0005] In a first aspect, the present invention provides a method for testing the impact rate of a virtual train formation, comprising:

[0006] Acquire the running data of the train before and after the virtual train formation during operation;

[0007] The target front vehicle impact rate is determined based on the front vehicle speed information in the train's running data, and the target rear vehicle impact rate is determined based on the rear vehicle speed information in the train's running data.

[0008] The impact rate test results of the virtual train formation are output based on the target front vehicle impact rate and the target rear vehicle impact rate.

[0009] According to the impact rate testing method for virtual train formations provided by the present invention, the step of determining the target preceding train impact rate based on the preceding train speed information in the preceding train's running data includes:

[0010] Process the speed information of the vehicle in front and obtain the average speed of the vehicle in front at each first measurement point within the first preset period;

[0011] Differentiate the average speed of the vehicle ahead at all first measurement points to obtain the acceleration of the vehicle ahead at each first measurement point;

[0012] The front vehicle impact rate at each first measurement point is obtained by differentiating the front vehicle acceleration at all first measurement points.

[0013] The target forward impact rate is determined by the forward impact rate with the largest absolute value among all forward impact rates.

[0014] According to the impact rate testing method for virtual train formation provided by the present invention, the step of determining the target rear train impact rate based on the rear train speed information in the rear train operation data of the formation includes:

[0015] Process the following vehicle speed information to obtain the average speed of the following vehicle at each second measurement point within the second preset period;

[0016] Differentiate the average velocity of the rear vehicle at all second measurement points to obtain the acceleration of the rear vehicle at each second measurement point.

[0017] The rear vehicle impact rate at each second measurement point is obtained by differentiating the rear vehicle acceleration at all second measurement points.

[0018] The rear vehicle impact rate with the largest absolute value among all rear vehicle impact rates is determined as the target rear vehicle impact rate.

[0019] According to the impact rate testing method for virtual train formation provided by the present invention, the step of outputting the impact rate test result of the virtual train formation based on the target preceding train impact rate and the target following train impact rate includes:

[0020] If the absolute value of the target front vehicle impact rate is less than or equal to a first preset value, and the absolute value of the target rear vehicle impact rate is less than or equal to a second preset value, the impact rate test result of the virtual train formation is output as passed, and the front vehicle test result curve and the rear vehicle test result curve are generated.

[0021] Otherwise, the impact rate test result for the virtual train formation will be "fail".

[0022] According to the impact rate testing method for virtual train formation provided by the present invention, after outputting the impact rate test result of the virtual train formation as failing, the method further includes:

[0023] Adjust the operating parameters of the virtual train formation;

[0024] The system then acquires the running data of the train before and after the virtual train formation during operation to output the impact rate test results of the virtual train formation until the impact rate test results of the virtual train formation are passed.

[0025] The operating parameters of the virtual train formation include at least the acceleration parameters of the leading train and the trailing train under virtual formation.

[0026] The impact rate testing method for virtual train formation provided by the present invention further includes, before acquiring the running data of the preceding and following trains during the operation of the virtual train formation:

[0027] Establish a virtual train that associates the leading car with the trailing car;

[0028] After confirming that the virtual train formation has completed the preset route operation, a data acquisition command is generated;

[0029] The data acquisition command is used to acquire the running data of the train before and after the virtual train formation during operation.

[0030] According to the impact rate testing method for virtual train formation provided by the present invention, after generating the data acquisition instruction and before acquiring the running data of the preceding and following trains during the operation of the virtual train formation, the method further includes:

[0031] Obtain the initial data of the leading and trailing trains in the train formation;

[0032] Clean the initial data of the train leading the formation and the initial data of the train following the formation, and filter out the running data of the train leading the formation and the running data of the train following the formation.

[0033] Secondly, a device for testing the impact rate of a virtual train formation is provided, comprising:

[0034] The acquisition unit is used to acquire the running data of the train before and after the virtual train formation during the operation of the train formation.

[0035] The determining unit is used to determine the target front vehicle impact rate based on the front vehicle speed information in the front vehicle operation data of the train formation, and to determine the target rear vehicle impact rate based on the rear vehicle speed information in the rear vehicle operation data of the train formation.

[0036] The output unit is used to output the impact rate test results of the virtual train formation based on the target front vehicle impact rate and the target rear vehicle impact rate.

[0037] 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 impact rate testing method for the virtual train formation.

[0038] 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 impact rate testing method for virtual train formations as described above.

[0039] This invention provides a method, apparatus, equipment, and medium for testing the impact rate of a virtual train formation. It acquires the running data of the preceding and following trains during the virtual train formation process, determines the target impact rate of the preceding train based on the speed information of the preceding train, determines the target impact rate of the following train based on the speed information of the following train, and finally outputs the impact rate test results of the virtual train formation based on the target impact rates of the preceding and following trains. By testing the impact rate of the virtual train formation, the operational safety of the virtual train formation is ensured, user comfort is improved, and the risk of accidents is reduced. Attached Figure Description

[0040] 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.

[0041] Figure 1 This is one of the flowcharts illustrating the impact rate testing method for virtual train formations provided by this invention;

[0042] Figure 2 This is a flowchart illustrating the process of determining the target forward impact rate provided by the present invention;

[0043] Figure 3 This is a flowchart illustrating the process of determining the target rear vehicle impact rate provided by the present invention;

[0044] Figure 4 This is a schematic diagram of the test result curve of the front vehicle provided by the present invention;

[0045] Figure 5 This is a schematic diagram of the test result curve of the rear vehicle provided by the present invention;

[0046] Figure 6 This is the second flowchart of the impact rate testing method for virtual train formation provided by the present invention;

[0047] Figure 7 This is a schematic diagram of a virtual train formation provided by the present invention during operation;

[0048] Figure 8 This is the third flowchart of the impact rate testing method for virtual train formation provided by the present invention;

[0049] Figure 9 This is a schematic diagram of the impact rate testing device for virtual train formation provided by the present invention;

[0050] Figure 10 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0051] 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.

[0052] Virtual train formation technology for urban rail transit is a technology based on communication and control systems that enables collaborative operation and formation of multiple trains. Through virtual formation technology, multiple trains can be formed within a certain distance and operate collaboratively through joint control, improving the line's transport capacity and efficiency. In the field of urban rail transit, virtual formation technology can reduce system construction and operation costs, and improve train operation safety and punctuality.

[0053] During urban rail train operation, testing and verifying the maximum impact rate is crucial to ensure train safety and passenger comfort. However, in traditional urban rail trains, impact rate testing is typically performed only on individual trains, which cannot be directly applied to virtual train formations. Furthermore, due to the relative scarcity of methods and tools for testing the maximum impact rate of virtual train formations, especially for urban rail virtual formation technology, the operational safety and punctuality of virtual train formations cannot be guaranteed. To address these technical problems, this invention provides a method, apparatus, equipment, and medium for testing the impact rate of virtual train formations. Figure 1 This is one of the flowcharts illustrating the impact rate testing method for virtual train formations provided by the present invention. The impact rate testing method for virtual train formations includes:

[0054] Step 101: Obtain the running data of the train before and after the virtual train formation during operation.

[0055] In step 101, the fore-train and the rear-train form a virtual train formation. After the virtual train formation is formed, it runs on a preset route. This invention can acquire the running data of the fore-train and the rear-train during the real-time operation of the virtual train formation, and it can also acquire the running data of the fore-train and the rear-train during the operation of the virtual train formation after the preset route is completed.

[0056] Optionally, the present invention will install test equipment on the leading and trailing cars of the virtual train formation, and acquire the running data of the leading and trailing cars based on the test equipment. The running data of the leading car includes the speed and position information of the leading car during all stages of the running process, and the running data of the trailing car includes the speed and position information of the trailing car during all stages of the running process.

[0057] Step 102: Determine the target front vehicle impact rate based on the front vehicle speed information in the train's running data, and determine the target rear vehicle impact rate based on the rear vehicle speed information in the train's running data.

[0058] In step 102, the train impact rate is the rate of change of the train when it experiences acceleration, deceleration, or slowdown. The smaller the impact rate, the more comfortable the user experience; the larger the impact rate, the lower the user experience. Since this invention tests the impact rate of the front train and the impact rate of the rear train in a virtual train formation, it is necessary to determine the impact rate of the front train based on the running data of the front train in the formation and the impact rate of the rear train based on the running data of the rear train in the formation.

[0059] Optionally, the present invention first extracts the speed information of the preceding train from the running data of the preceding train in the train formation, and extracts the speed information of the following train from the running data of the following train in the train formation. Then, by performing second-order derivatives on the speed information of the preceding train and the speed information of the following train during the entire operation process of the virtual train formation, the target preceding train impact rate is determined based on the preceding train speed information, and the target following train impact rate is determined based on the following train speed information. Optionally, the first derivative is the rate of change of speed, and the second derivative is the rate of change of the first derivative, that is, the rate of change of the rate of change of the first derivative.

[0060] Optionally, the target forward vehicle impact rate is a test indicator used to determine whether the impact rate test meets the preset requirements. It can be the largest forward vehicle impact rate among all forward vehicle impact rate values, the average of all forward vehicle impact rate values, or the smallest forward vehicle impact rate among all forward vehicle impact rate values. Correspondingly, the target rear vehicle impact rate is a test indicator used to determine whether the impact rate test meets the preset requirements. It can be the largest rear vehicle impact rate among all rear vehicle impact rate values, the average of all rear vehicle impact rate values, or the smallest rear vehicle impact rate among all rear vehicle impact rate values.

[0061] Step 103: Output the impact rate test results of the virtual train formation based on the target front vehicle impact rate and the target rear vehicle impact rate.

[0062] In step 103, whether the impact rate test of the virtual train formation in this invention passes depends simultaneously on the impact rate of the target preceding train and the impact rate of the target following train. That is, the impact rate of the target preceding train and the impact rate of the target following train must simultaneously meet their corresponding preset test conditions for the impact rate test result of the virtual train formation to be considered passed. In all three cases where the impact rate of the target preceding train meets its preset test conditions but the impact rate of the target following train does not meet its preset test conditions, or where the impact rate of the target preceding train does not meet its preset test conditions but the impact rate of the target following train meets its preset test conditions, or where neither the impact rate of the target preceding train nor the impact rate of the target following train meets its preset test conditions, the impact rate test result of the virtual train formation is output as failed.

[0063] This invention provides a method for testing the maximum impact rate during the formation and operation of virtual trains in urban rail transit. By designing test steps and collecting actual operating data of the virtual trains, it analyzes key values ​​and calculates the maximum impact rate index of the trains throughout the entire formation and operation process. This effectively verifies the maximum impact rate during the formation and operation of virtual trains, filling the gap in testing methods and tools for the maximum impact rate of train formations in urban rail transit technology. It also addresses a technological deficiency in this field by calculating and verifying the maximum impact rate of virtual train formations in real time, achieving automated testing and result output. Testing and verifying the maximum impact rate of train formations ensures the safety of the trains during operation and reduces the risk of accidents. By collecting actual operating data and applying analytical techniques, the maximum impact rate index of the train formations can be accurately calculated, improving the accuracy of the test results. This invention provides reliable technical support and assurance for the application of virtual train formation technology in urban rail transit systems, promoting its further development and application.

[0064] This invention provides a method, apparatus, equipment, and medium for testing the impact rate of a virtual train formation. It acquires the running data of the preceding and following trains during the virtual train formation process, determines the target impact rate of the preceding train based on the speed information of the preceding train, determines the target impact rate of the following train based on the speed information of the following train, and finally outputs the impact rate test results of the virtual train formation based on the target impact rates of the preceding and following trains. By testing the impact rate of the virtual train formation, the operational safety of the virtual train formation is ensured, user comfort is improved, and the risk of accidents is reduced.

[0065] Figure 2 This is a flowchart illustrating the process of determining the target preceding vehicle impact rate provided by the present invention. The step of determining the target preceding vehicle impact rate based on the preceding vehicle speed information in the train's preceding vehicle running data includes:

[0066] Step 201: Process the speed information of the vehicle in front and obtain the average speed of the vehicle in front at each first measurement point within the first preset period.

[0067] In step 201, the speed information of the preceding vehicle obtained from the running data of the preceding vehicle in the group is determined based on the speed information measured by the testing equipment in different cycles. The first preset cycle can be 5 cycles, 6 cycles, or 10 cycles. Specifically, if the first preset cycle is 6 cycles, after determining any first measurement point, the speed information of the three cycles before the first measurement point and the speed information of the three cycles after the first measurement point are obtained. Then, the noise and outliers in the data are smoothed by a smoothing curve algorithm to make the data more stable and reliable. Then, the average speed of all speeds in the first preset cycle is taken as the average speed of the preceding vehicle at the first measurement point. Based on the above processing method, all first measurement points are traversed until the average speed of the preceding vehicle at each first measurement point is obtained.

[0068] Step 202: Differentiate the average speed of the vehicle in front at all first measurement points to obtain the acceleration of the vehicle in front at each first measurement point.

[0069] In step 202, the acceleration of the vehicle in front is the derivative of the average speed of the vehicle in front with respect to time, which reflects the rate of change of the average speed of the vehicle in front at all first measurement points. The present invention can determine the acceleration of the vehicle in front at each first measurement point according to the velocity differential equation or the acceleration calculation formula.

[0070] Step 203: Differentiate the acceleration of the vehicle ahead at all first measurement points to obtain the impact rate of the vehicle ahead at each first measurement point.

[0071] In step 203, the front vehicle impact rate is the derivative of the front vehicle acceleration with respect to time, which reflects the rate of change of the front vehicle acceleration at all first measurement points. The present invention can determine the front vehicle impact rate of any first measurement point based on the difference between the front vehicle acceleration measured at adjacent first measurement points and the quotient of the time measured at adjacent first measurement points. The present invention can also determine the front vehicle impact rate of each first measurement point through differential equations.

[0072] Step 204: Determine the target forward impact rate as the forward impact rate with the largest absolute value among all forward impact rates.

[0073] In step 204, the preceding vehicle impact rate can be positive or negative. When the preceding vehicle impact rate is positive, it means that the acceleration of the train is getting faster and faster. When the preceding vehicle impact rate is negative, it means that the acceleration of the train is getting slower and slower. This ensures that the testing of the preceding vehicle impact rate can meet both the testing requirements of increasing acceleration and decreasing acceleration. This invention determines the absolute value of all preceding vehicle impact rates based on all preceding vehicle impact rates, and extracts the preceding vehicle impact rate with the largest absolute value from all preceding vehicle impact rates to determine the target preceding vehicle impact rate.

[0074] This invention defines the target impact rate as the impact rate of the vehicle with the largest absolute value among all impact rates of the preceding vehicle. In subsequent impact rate tests, as long as the target impact rate meets the preset test requirements, it can be considered that the absolute values ​​of all impact rates of the preceding vehicle meet the preset test requirements. This simplifies the testing process, facilitates test calculations, and improves testing efficiency.

[0075] Figure 3 This is a flowchart illustrating the process of determining the target rear vehicle impact rate provided by the present invention. The step of determining the target rear vehicle impact rate based on the rear vehicle speed information in the train's running data includes:

[0076] Step 301: Process the following vehicle speed information to obtain the average speed of the following vehicle at each second measurement point within the second preset period.

[0077] In step 301, the method of processing the speed information of the following vehicle can be the same as or different from the method of processing the speed information of the preceding vehicle. The second preset period can be the same as or different from the first preset period. The speed information of the following vehicle obtained from the running data of the grouped vehicles in this invention is determined based on the speed information measured by the test equipment in different periods. The second preset period can be 3 periods, 8 periods or 10 periods. Specifically, if the second preset period is 8 periods, after determining any second measurement point, the speed information of the four periods before the second measurement point and the speed information of the four periods after the second measurement point are obtained. Then, the noise and outliers in the data are smoothed by the smoothing curve algorithm to make the data more stable and reliable. Then, the average speed of all speeds in the second preset period is taken as the average speed of the following vehicle at the second measurement point. Based on the above processing method, all second measurement points are traversed until the average speed of the following vehicle at each second measurement point is obtained.

[0078] Step 302: Differentiate the average velocity of the rear vehicle at all second measurement points to obtain the acceleration of the rear vehicle at each second measurement point.

[0079] In step 302, the rear vehicle acceleration is the derivative of the rear vehicle's average speed with respect to time, which reflects the rate of change of the rear vehicle's average speed at all second measurement points. The present invention can determine the rear vehicle acceleration at each second measurement point based on the velocity differential equation or the acceleration calculation formula.

[0080] Step 303: Differentiate the rear vehicle acceleration at all second measurement points again to obtain the rear vehicle impact rate at each second measurement point.

[0081] In step 303, the rear vehicle impact rate is the derivative of the rear vehicle acceleration with respect to time, which reflects the rate of change of the rear vehicle acceleration at all second measurement points. The present invention can determine the rear vehicle impact rate of any second measurement point based on the quotient of the difference in rear vehicle acceleration measured at adjacent second measurement points and the time measured at adjacent second measurement points. The present invention can also determine the rear vehicle impact rate of each second measurement point through differential equations.

[0082] Step 304: Determine the rear vehicle impact rate with the largest absolute value among all rear vehicle impact rates as the target rear vehicle impact rate.

[0083] In step 304, corresponding to the preceding vehicle impact rate, the following vehicle impact rate can be positive or negative. When the following vehicle impact rate is positive, it means that the train's acceleration is getting faster and faster. When the following vehicle impact rate is negative, it means that the train's acceleration is getting slower and slower. This ensures that the test of the following vehicle impact rate can meet both the test requirements of increasing acceleration and decreasing acceleration. This invention determines the absolute value of all following vehicle impact rates based on all following vehicle impact rates, and extracts the following vehicle impact rate with the largest absolute value from all the following vehicle impact rates to determine the target following vehicle impact rate.

[0084] This invention defines the target rear vehicle impact rate as the rear vehicle impact rate with the largest absolute value among all rear vehicle impact rates. In subsequent rear vehicle impact rate tests, as long as the target rear vehicle impact rate meets the preset test requirements, it can be considered that the absolute values ​​of all rear vehicle impact rates meet the preset test requirements. This simplifies the testing process, facilitates test calculations, and improves testing efficiency.

[0085] Optionally, the step of outputting the impact rate test results of the virtual train formation based on the target preceding vehicle impact rate and the target following vehicle impact rate includes:

[0086] If the absolute value of the target front vehicle impact rate is less than or equal to a first preset value, and the absolute value of the target rear vehicle impact rate is less than or equal to a second preset value, the impact rate test result of the virtual train formation is output as passed, and the front vehicle test result curve and the rear vehicle test result curve are generated.

[0087] Optionally, the first preset value may be the same as or different from the second preset value. For example, if the first preset value is the same as the second preset value, the first preset value is 89 cm / s / s and the second preset value is 89 cm / s / s. If the first preset value is different from the second preset value, the first preset value is 89 cm / s / s and the second preset value is 85 cm / s / s.

[0088] Optionally, since the absolute value of the target preceding vehicle impact rate is the largest among all preceding vehicle impact rates, the impact rate test of the preceding vehicle is considered to have passed as long as the absolute value of the target preceding vehicle impact rate is less than or equal to 89 cm / s / s. Similarly, since the absolute value of the target following vehicle impact rate is the largest among all following vehicle impact rates, the impact rate test of the following vehicle is considered to have passed as long as the absolute value of the target following vehicle impact rate is less than or equal to 89 cm / s / s. However, the impact rate test result of the virtual train formation needs to consider not only the impact rate test of the preceding vehicle but also the impact rate test of the following vehicle. Therefore, the impact rate test result of the virtual train formation will only be output as passed if the absolute value of the target preceding vehicle impact rate is less than or equal to a first preset value and the absolute value of the target following vehicle impact rate is less than or equal to a second preset value; otherwise, the impact rate test result of the virtual train formation will be output as failed.

[0089] Optionally, the present invention generates the test result curves of the preceding train and the following train before, during, or after determining that the impact rate test result of the virtual train formation is passed. Figure 4 This is a schematic diagram of the test result curve of the preceding vehicle provided by the present invention. Figure 5 This is a schematic diagram of the rear vehicle test result curve provided by the present invention. Figure 4 as well as Figure 5 This invention provides a more intuitive visualization of the impact rate test of virtual train formations, allowing testers to monitor the impact rate of the train formations in real time, promptly identify and analyze any safety risks, and take appropriate measures for adjustment and optimization. This provides reliable technical support and assurance for the application of virtual train formation technology in urban rail transit systems. By accurately testing and verifying the maximum impact rate of the train formations, this invention ensures the safe operation of the system, improves the efficiency and reliability of the entire urban rail transit system, and promotes its widespread application in urban rail transit systems.

[0090] Figure 6This is the second flowchart illustrating the impact rate testing method for virtual train formations provided by this invention. The method includes a data acquisition module, a data analysis module, a data calculation module, and a test result output module. After starting the test scenario, the invention determines whether the train formation has been successfully established. If virtual formation establishment fails, the test scenario is reset and restarted. If virtual formation establishment is successful, data acquisition is performed. After data preprocessing, the speed information of the train formation is extracted through data classification by the data analysis module. After data filtering, the real-time speed information of the train before and after the formation is obtained. According to the data calculation module, the speed differential algorithm is used to calculate the speed of the train before and after the formation. The real-time acceleration value of the train is used to calculate the real-time impact rate of the train ahead in the formation using a differential acceleration algorithm. The real-time acceleration value of the train behind in the formation is calculated using a differential velocity algorithm, and the real-time impact rate of the train behind in the formation is calculated again using a differential acceleration algorithm. In the test result output module, the above indicators are compared. If the impact rate of both the train ahead and the train behind in the formation is less than or equal to 89 cm / s / s, the test result is considered passed, and a result curve is generated. Otherwise, the test result is considered failed, and a corresponding result curve is generated. Then, manual evaluation is performed, and the virtual train formation operation parameters are modified. The test scenario is reset, restarted, and the impact rate test of the virtual train formation is repeated until the test result output is passed.

[0091] Optionally, after the impact rate test result of the output virtual train formation is "fail", the method further includes:

[0092] Adjust the operating parameters of the virtual train formation;

[0093] The system then acquires the running data of the train before and after the virtual train formation during operation to output the impact rate test results of the virtual train formation until the impact rate test results of the virtual train formation are passed.

[0094] The operating parameters of the virtual train formation include at least the acceleration parameters of the leading train and the trailing train under virtual formation.

[0095] After the impact rate test result of the virtual train formation is found to be unsuccessful, it is discovered that the impact rate measured during the entire operation of the virtual train formation has certain problems and shortcomings. This invention can facilitate further review by testers by generating curves. Optionally, this invention can also adjust the train operation parameters of the virtual train formation. The operation parameters of the virtual train formation include at least the acceleration parameters of the leading and trailing trains under virtual formation. After adjusting the train operation parameters of the virtual train formation, the operation data of the leading and trailing trains during the operation of the virtual train formation are acquired again to output the impact rate test result of the virtual train formation. If the output impact rate test result of the virtual train formation is unsuccessful, the train operation parameters of the virtual train formation are adjusted again. If the output impact rate test result of the virtual train formation is successful, the adjustment is stopped.

[0096] This invention addresses the limitation of existing technologies that can only test the impact rate of a single train. It proposes a comprehensive testing method for virtual train formations, accurately measuring and verifying the maximum impact rate of the formation. Furthermore, the invention outputs the test results in a visual format, facilitating further analysis and evaluation by testers. Testers can compare the output results with the expected performance for evaluation and improvement. If a test fails, testers can analyze the specific values ​​output, suggest modifications to the formation operation parameters, and re-test and verify the maximum impact rate of the virtual train formation. Ultimately, this helps optimize the operating parameters and algorithms of the urban rail virtual train formation system, improving system efficiency and performance. This invention is of great significance for the maximum impact rate testing and verification, algorithm optimization, and parameter adjustment during the actual formation operation of urban rail virtual trains, providing reliable technical support and assurance for the application of virtual train formation technology in urban rail transit systems.

[0097] Figure 7 This is a schematic diagram of a virtual train formation during operation provided by the present invention. Before acquiring the running data of the train before and after the formation, the method further includes:

[0098] Establish a virtual train that associates the leading car with the trailing car;

[0099] After confirming that the virtual train formation has completed the preset route operation, a data acquisition command is generated;

[0100] The data acquisition command is used to acquire the running data of the train before and after the virtual train formation during operation.

[0101] Optionally, such as Figure 7As shown, during the operation of the train unit of the present invention from station 3 to station 2, a virtual train formation is established, associating the preceding and following cars. This transitions the train unit from single-car operation to virtual train formation operation, and during the operation from station 2 to station 1 and from station 1 to station 2, a preset route is achieved. After confirming that the virtual train formation has completed the preset route operation, a data acquisition command is generated; this command is used to acquire the operating data of the preceding and following cars during the operation of the virtual train formation.

[0102] This invention aims to address the lack of testing methods and tools for the maximum impact rate of train operation in current urban rail virtual train formation technology. By designing a test scenario and initiating train operation within that scenario to put the train into virtual train formation mode, the test device collects test data during the virtual train formation operation. This fills the technical gap in impact rate testing for urban rail virtual train formation technology and provides a testing foundation for subsequent effective verification of impact rate testing during virtual train formation operation.

[0103] This invention, by designing test procedures and collecting actual operating data of virtual train formations, analyzes key values ​​and calculates the maximum impact rate of the train formation throughout the entire operation process. This effectively verifies the maximum impact rate during the virtual train formation operation, solving the problem of traditional subway trains only conducting impact rate tests on individual vehicles and relying on manual data analysis, which cannot automatically obtain test results. Furthermore, by setting test scenarios, this invention also enables real-time calculation, verification, and output of the maximum impact rate of the virtual train formation during its operation, allowing for rapid and accurate verification of the maximum impact rate during virtual train formation operation.

[0104] Figure 8 This is the third flowchart of the impact rate test method for virtual train formation provided by the present invention. The test device includes a data acquisition module, a data analysis module, a data calculation module, and a test result output module.

[0105] like Figure 8 As shown, this invention first designs and describes a scenario, designing two unit trains to complete the formation and operate in a virtual train formation mode according to a fixed route. During the operation, the operating data of the train before and after the virtual train formation is collected and analyzed in real time. Then, a testing device is set up and connected to the recording board of the virtual train's onboard equipment. It is ensured that the testing device can normally receive the actual operating data sent by the onboard equipment. The train is then started to enter the virtual formation mode, and the virtual train runs according to the fixed route throughout the entire process.

[0106] Optionally, a scenario is designed in the data acquisition module, and the virtual train is started to run normally to realize the acquisition of virtual train operation data. This invention collects and preprocesses test data through a testing device, extracts features, classifies and filters the collected data. During the data analysis process, the collected data needs to be extracted, preprocessed, classified and filtered. The current speed information of the train before and after the train in the formation is output to the data calculation module. The data calculation module extracts and calculates the impact rate value of the train before and after the train in the formation. Specifically, the algorithm used for the first calculation is the velocity differential algorithm. After the first calculation, the real-time acceleration value of the train before and after the train in the virtual formation can be obtained. After the first calculation, the algorithm used for the second calculation is the acceleration differential algorithm. After the second calculation, the real-time impact rate of the train before and after the train in the virtual formation can be obtained. After the second calculation, the calculation result is output to the test result output module. In the test result output module, the test result curve is generated and the test result is output.

[0107] Optionally, after generating the data acquisition instruction, and before acquiring the running data of the preceding and following cars during the virtual train formation process, the method further includes:

[0108] Obtain the initial data of the leading and trailing trains in the train formation;

[0109] Clean the initial data of the train leading the formation and the initial data of the train following the formation, and filter out the running data of the train leading the formation and the running data of the train following the formation.

[0110] This invention acquires initial data from both the lead train and the trailing train in a train formation. Then, it preprocesses this data, including 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 generate test results. This invention effectively assesses the impact rate of virtual train formations. After preprocessing, the data from both the lead and trailing trains becomes more accurate, providing more precise test results.

[0111] Figure 9 This is a schematic diagram of the impact rate testing device for 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 train before and after the formation during the operation 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.

[0112] The impact rate testing device for the virtual train formation also includes a determination unit 2. The determination unit is used to determine the target impact rate of the preceding train based on the speed information of the preceding train in the train formation's running data, and to determine the target impact rate of the following train based on the speed information of the following train in the train formation's running data. The working principle of the determination unit 2 can be referred to the aforementioned step 102, and will not be repeated here.

[0113] The impact rate testing device for the virtual train formation also includes an output unit 3. The output unit is used to output the impact rate test results of the virtual train formation based on the target front train impact rate and the target rear train impact rate. The working principle of the output unit 3 can be referred to the aforementioned step 103, and will not be repeated here.

[0114] This invention provides a method, apparatus, equipment, and medium for testing the impact rate of a virtual train formation. It acquires the running data of the preceding and following trains during the virtual train formation process, determines the target impact rate of the preceding train based on the speed information of the preceding train, determines the target impact rate of the following train based on the speed information of the following train, and finally outputs the impact rate test results of the virtual train formation based on the target impact rates of the preceding and following trains. By testing the impact rate of the virtual train formation, the operational safety of the virtual train formation is ensured, user comfort is improved, and the risk of accidents is reduced.

[0115] Figure 10 This is a schematic diagram of the structure of the electronic device provided by the present invention. For example... Figure 10 As 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 logical instructions in the memory 130 to execute a method for testing the impact rate of a virtual train formation. This method includes: acquiring the running data of the preceding and following trains during the operation of the virtual train formation; determining the target impact rate of the preceding train based on the speed information of the preceding train in the running data of the preceding train; determining the target impact rate of the following train based on the speed information of the following train in the running data of the following train; and outputting the impact rate test result of the virtual train formation based on the target impact rate of the preceding train and the target impact rate of the following train.

[0116] 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.

[0117] 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 method for testing the impact rate of a virtual train formation provided by the above methods. The method includes: acquiring the running data of the preceding train and the following train during the operation of the virtual train formation; determining the target impact rate of the preceding train based on the speed information of the preceding train in the running data of the preceding train; determining the target impact rate of the following train based on the speed information of the following train in the running data of the following train; and outputting the impact rate test result of the virtual train formation based on the target impact rate of the preceding train and the target impact rate of the following train.

[0118] 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 a method for testing the impact rate of a virtual train formation provided by the methods described above. This method includes: acquiring running data of the preceding train and the following train during the operation of the virtual train formation; determining a target preceding train impact rate based on the preceding train speed information in the preceding train running data; determining a target following train impact rate based on the following train speed information in the following train running data; and outputting the impact rate test result of the virtual train formation based on the target preceding train impact rate and the target following train impact rate.

[0119] 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.

[0120] 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.

[0121] 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 testing the impact rate of a virtual train formation, characterized in that, include: Acquire the running data of the train before and after the virtual train formation during operation; The target front vehicle impact rate is determined based on the front vehicle speed information in the train's running data, and the target rear vehicle impact rate is determined based on the rear vehicle speed information in the train's running data. The impact rate test results of the virtual train formation are output based on the target front vehicle impact rate and the target rear vehicle impact rate. The step of outputting the impact rate test results of the virtual train formation based on the target preceding vehicle impact rate and the target following vehicle impact rate includes: If the absolute value of the target front vehicle impact rate is less than or equal to a first preset value, and the absolute value of the target rear vehicle impact rate is less than or equal to a second preset value, the impact rate test result of the virtual train formation is output as passed, and the front vehicle test result curve and the rear vehicle test result curve are generated. Otherwise, the impact rate test result for the virtual train formation will be "fail". After the impact rate test result of the virtual train formation is output as "fail", the method further includes: Adjust the operating parameters of the virtual train formation; The system then acquires the running data of the train before and after the virtual train formation during operation to output the impact rate test results of the virtual train formation until the impact rate test results of the virtual train formation are passed. The operating parameters of the virtual train formation include at least the acceleration parameters of the leading train and the trailing train under virtual formation.

2. The impact rate testing method for virtual train formations according to claim 1, characterized in that, The step of determining the target preceding vehicle impact rate based on the preceding vehicle speed information in the train's preceding vehicle's running data includes: Process the speed information of the vehicle in front and obtain the average speed of the vehicle in front at each first measurement point within the first preset period; Differentiate the average speed of the vehicle ahead at all first measurement points to obtain the acceleration of the vehicle ahead at each first measurement point; The front vehicle impact rate at each first measurement point is obtained by differentiating the front vehicle acceleration at all first measurement points. The target forward impact rate is determined by the forward impact rate with the largest absolute value among all forward impact rates.

3. The impact rate testing method for virtual train formations according to claim 1, characterized in that, Determining the target rear vehicle impact rate based on the rear vehicle speed information in the train's running data includes: Process the following vehicle speed information to obtain the average speed of the following vehicle at each second measurement point within the second preset period; Differentiate the average velocity of the rear vehicle at all second measurement points to obtain the acceleration of the rear vehicle at each second measurement point. The rear vehicle impact rate at each second measurement point is obtained by differentiating the rear vehicle acceleration at all second measurement points. The rear vehicle impact rate with the largest absolute value among all rear vehicle impact rates is determined as the target rear vehicle impact rate.

4. The impact rate testing method for virtual train formations according to claim 1, characterized in that, Before acquiring the running data of the preceding and following cars in the virtual train formation process, the following steps are also included: Establish a virtual train that associates the leading car with the trailing car; After confirming that the virtual train formation has completed the preset route operation, a data acquisition command is generated; The data acquisition command is used to acquire the running data of the train before and after the virtual train formation during operation.

5. The impact rate testing method for virtual train formations according to claim 4, characterized in that, After generating the data acquisition instruction, and before acquiring the running data of the preceding and following cars during the virtual train formation process, the method further includes: Obtain the initial data of the leading and trailing trains in the train formation; Clean the initial data of the train leading the formation and the initial data of the train following the formation, and filter out the running data of the train leading the formation and the running data of the train following the formation.

6. An impact rate testing device for virtual train formations, characterized in that, include: The acquisition unit is used to acquire the running data of the train before and after the virtual train formation during the operation of the train formation. The determining unit is used to determine the target front vehicle impact rate based on the front vehicle speed information in the train's front vehicle operation data, and to determine the target rear vehicle impact rate based on the rear vehicle speed information in the train's rear vehicle operation data. An output unit is used to output the impact rate test results of the virtual train formation based on the target front vehicle impact rate and the target rear vehicle impact rate. The output unit is specifically used for: If the absolute value of the target front vehicle impact rate is less than or equal to a first preset value, and the absolute value of the target rear vehicle impact rate is less than or equal to a second preset value, the impact rate test result of the virtual train formation is output as passed, and the front vehicle test result curve and the rear vehicle test result curve are generated. Otherwise, the impact rate test result for the virtual train formation will be "fail". After the impact rate test result of the virtual train formation is output as "fail", the device is also used to: Adjust the operating parameters of the virtual train formation; The system then acquires the running data of the train before and after the virtual train formation during operation to output the impact rate test results of the virtual train formation until the impact rate test results of the virtual train formation are passed. The operating parameters of the virtual train formation include at least the acceleration parameters of the leading train and the trailing train under virtual formation.

7. 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 impact rate testing method for virtual train formations as described in any one of claims 1-5.

8. 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 impact rate testing method for virtual train formations as described in any one of claims 1-5.

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