A track minimum segment length calculation method, system, device and medium

Abstract

The present application relates to a kind of track minimum section length calculation method, system, equipment and medium, the method first clearly the fault scene that track section length is too small appears, secondly, the actual parameter of line is input, finally, the minimum length of section under different fault scene is automatically calculated, and the maximum minimum length of section in different fault scene is selected as the final track minimum section length.Compared with prior art, the present application has the advantages of reducing the workload of designers, reducing the error probability and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to a rail transit signal control system, in particular to a rail minimum section length calculation method, system, device and medium. BACKGROUND

[0002] The urban rail transit signal system divides the line into several small sections, and the section is divided through the axle counting device. The axle counting system can detect whether the section is occupied by a train, and sends the section occupation or clearance information to the interlocking system, which is used for the calculation of train position and train operation protection by the signal system. The specific principle is as shown in the following figure. Figure 1

[0003] The axle counting system is divided into an indoor operation unit and an outdoor magnetic head device. The outdoor magnetic head device calculates the running direction of the train and the number of train wheel pairs passing through by emitting electromagnetic waves, and sends the information to the indoor operation unit. The indoor operation unit calculates the number of axles entering the section and the number of axles leaving the section to determine whether they are the same. If they are different, it is determined that the section is occupied. If they are the same, it is determined that the section is clear. The operation unit drives the relay with high / low level to clear / occupy the section information. The interlocking system acquires the clearance / occupation information of the section by collecting the state of the relay. The interlocking system then performs other logical operations according to the section information to protect the safe operation of the train.

[0004] Due to the delay characteristics of device detection, operation, and data transmission, if the section length is set too small, the device response delay will cause the signal system to make an error calculation, which will affect the safe operation of the train. Therefore, at the beginning of the design, the minimum length of the system that can be tolerated needs to be calculated according to the actual situation of the line, the performance of the device, the parameters of the vehicle, etc. to avoid abnormal results output by the signal system. However, due to the different parameters of each line and the performance of the device, the minimum section length of the line is also different, which requires designers to manually calculate, thereby increasing the workload of the designers, and the correctness of the calculation result cannot be guaranteed. If the minimum section length is calculated incorrectly at the beginning of the design or the minimum section situation is not evaluated, the problem will be exposed during the project implementation or operation stage, and it is difficult to rectify the line.

[0005] Therefore, how to calculate the minimum length of the section under different scenarios to reduce the workload of the designers and avoid the situation of manual calculation error by the designers has become a technical problem to be solved. SUMMARY

[0006] The purpose of the present application is to overcome the defects of the prior art and provide a rail minimum section length calculation method, system, device and medium, which automatically calculates the minimum length of the section under different scenarios, reduces the workload of the designers, and avoids the situation of manual calculation error by the designers.

[0007] ​The object of the present application can be achieved by the following technical solutions.

[0008] According to the first aspect of the present application, a track minimum section length calculation method is provided, which firstly identifies the fault scenarios that occur when the track section length is too small, secondly inputs the actual parameters of the line, and finally automatically calculates the minimum length of the section under different fault scenarios, and selects the maximum minimum length of the section in different fault scenarios as the final track minimum section length.

[0009] As a preferred technical solution, the fault scenarios include:

[0010] Scenario 1: There is interference between adjacent axle counting heads, resulting in incorrect section occupancy and clearance information;

[0011] Scenario 2: When the train does not leave a certain track section, the track section incorrectly changes from the occupied state to the clearance state;

[0012] Scenario 3: When the train passes through a certain track section, the system does not detect the occupancy of the track section;

[0013] Scenario 4: When the train sequentially passes through the track section, the system has inconsistent occupancy sequence.

[0014] As a preferred technical solution, the track minimum section length of scenario 1 is calculated as follows:

[0015] D_min_sdd_1 >= D_min_adj_axle

[0016] Wherein, D_min_sdd_1 is the track minimum section length of scenario 1, and D_min_adj_axle is the minimum axle counting head distance.

[0017] As a preferred technical solution, the track minimum section length of scenario 2 is calculated as follows:

[0018] D_min_sdd_2 >= D_max_adj_wheel + 2 x D_joint

[0019] Wherein D_min_sdd_2 is the track minimum section length of scenario 2, D_max_adj_wheel is the maximum distance between adjacent wheel pairs of the train, and D_joint is the detection uncertainty distance of the axle counting head.

[0020] As a preferred technical solution, the track minimum section length of scenario 3 is calculated as follows:

[0021] D_min_sdd_3≥(t_max_occp_dely(N)-t_min_libr_dely(N))×v_max+2×D_joint-D_max_wheel

[0022] Wherein, D_min_sdd_3 is the track minimum section length of scenario 3, t_max_occp_dely(N) is the maximum occupation delay of section N, t_min_libr_dely(N) is the minimum clearance delay of section N, v_max is the maximum running speed of the line, D_joint is the detection uncertainty distance of the axle counter, and D_max_wheel is the maximum distance of the outermost wheel pair of the train.

[0023] As a preferred technical solution, t_max_occp_dely(N)-t_min_libr_dely(N) needs to consider the delay performance of the axle counter system, the relay, and the interlocking system, and the specific calculation is as follows:

[0024] t_max_occp_dely(N)-t_min_libr_dely(N)=(t_sds_drop_max+t_relay_drop_max+t_cbi_input_max+t_cbi_cycle)-(t_sds_rise_min+t_relay_rise_min+t_cbi_input_min)

[0025] Wherein, t_sds_drop_max is the maximum delay of the axle counter system for calculating occupation, t_relay_drop_max is the maximum delay of the relay falling, t_cbi_input_max is the maximum delay of the interlocking system for obtaining the relay state, t_cbi_cycle is the internal calculation period of the interlocking, t_sds_rise_min is the minimum delay of the axle counter system for calculating clearance, t_relay_rise_min is the minimum delay of the relay rising, and t_cbi_input_min is the minimum delay of the interlocking system for obtaining the relay state.

[0026] As a preferred technical solution, the track minimum section length of scenario 4 is specifically calculated as follows:

[0027] D_min_sdd_4≥(t_max_occp_dely(N)-t_min_occp_dely(N+1))×v_max+2×D_joint

[0028] Wherein, D_min_sdd_4 is the minimum section length of scene 4, t_max_occp_dely(N) is the maximum occupation delay of section N, t_min_occp_dely(N+1) is the minimum occupation delay of section N+1, v_max is the maximum running speed of the line, and D_joint is the detection uncertainty distance of the axle counter head.

[0029] As a preferred technical solution, the t_max_occp_dely(N)-t_min_occp_dely(N+1) needs to consider the delay performance of the axle counter system, the relay, and the interlocking system, and the specific calculation process is as follows:

[0030] t_max_occp_dely(N)-t_min_occp_dely(N+1)=(t_sds_drop_max+t_relay_drop_max+t_cbi_input_max+t_cbi_cycle)-(t_sds_drop_min+t_relay_drop_min+t_cbi_input_min)

[0031] Wherein, t_sds_drop_max is the maximum delay of the axle counter system, t_relay_drop_max is the maximum delay of the relay, t_cbi_input_max is the maximum delay of the interlocking system, t_cbi_cycle is the internal calculation period of the interlocking system, t_sds_drop_min is the minimum delay of the axle counter system, t_relay_drop_min is the minimum delay of the relay, and t_cbi_input_min is the minimum delay of the interlocking system.

[0032] According to the second aspect of the present application, a system for the track minimum section length calculation method is provided, which comprises:

[0033] An input unit for inputting the parameters of the line;

[0034] A comparison and selection unit for local optimization input of the line parameters and comparison and selection of the vehicle parameters;

[0035] A calculation unit for calculating the minimum section length of multiple scenes according to the calculation formula given by the multiple scenes and the input parameters of the input unit and the comparison and selection unit;

[0036] An output unit for displaying the calculation results of multiple scenes calculated by the calculation unit and giving the minimum section length required to be met by the system.

[0037] As a preferred technical scheme, the input unit comprises a line parameter input module, a vehicle parameter input module and a device performance parameter input module, which are used for inputting different actual trackside parameters, train parameters and performance parameters of the axle counting system, relay and interlocking system used.

[0038] As a preferred technical scheme, the comparison unit comprises:

[0039] a line parameter local optimization input module, which is used for performing local optimization modification of the parameters;

[0040] a vehicle parameter comparison module, which is used for performing parameter comparison and selecting parameter values meeting the requirements from different vehicle parameters.

[0041] According to a third aspect of the present application, an electronic device is provided, comprising a memory and a processor, wherein the memory stores a computer program, and the processor executes the program to realize the method.

[0042] According to a fourth aspect of the present application, a computer readable storage medium is provided, which stores a computer program, and the program is executed by a processor to realize the method.

[0043] Compared with the prior art, the present application analyzes in detail the fault scenarios that occur when the length of the track section is insufficient, and provides specific calculation formulas for the minimum section length under different scenarios, and develops an automatic calculation system, thereby reducing the workload of the designers and the error probability. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is a schematic diagram of the track traffic signal system;

[0045] Figure 2 It is a calculation schematic diagram of scenario 1 of the present application;

[0046] Figure 3 It is a calculation schematic diagram of scenario 2 of the present application;

[0047] Figure 4 It is a calculation schematic diagram of scenario 3 of the present application;

[0048] Figure 5 It is a calculation schematic diagram of scenario 4 of the present application;

[0049] Figure 6 It is a structural schematic diagram of the system of the present application. DETAILED DESCRIPTION

[0050] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described in order to make the technical solutions in the embodiments of the present application apparent to those skilled in the art. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts should fall into the scope of the present application.

[0051] The present application proposes a track minimum section length calculation method, clearly defines the failure scenarios that occur when the track section length is too small, and gives the calculation method of the track section minimum length under different scenarios. The factors affecting the minimum length of the section are summarized, and on this basis, an automatic calculation system is developed. After the actual parameters of the line are input into the automatic system, the minimum length of the section under different scenarios is automatically calculated, which reduces the workload of the designers and avoids the situation of manual calculation errors.

[0052] When the track section length is designed and calculated, the minimum length of the section needs to be defined. If the minimum length of the section is defined too short, the following four abnormal scenarios will occur:

[0053] Scenario 1: There is interference between adjacent axle counters, resulting in incorrect section occupation and clearance information;

[0054] Scenario 2: When the train does not leave a certain track section, the track section incorrectly changes from the occupied state to the clearance state;

[0055] Scenario 3: When the train passes through a certain track section, the system does not detect the occupation of the track section;

[0056] Scenario 4: When the train sequentially passes through the track section, the system appears inconsistent in the occupation sequence, such as when the train sequentially passes through N and N+1 track sections, the system appears that the N+1 section is occupied earlier than the N section.

[0057] The minimum track section length calculation allowed by the system for different scenarios is described in detail as follows:

[0058] Scenario 1: As shown in Figure 2 , in order to avoid interference between adjacent axle counters, two adjacent axle counters need to meet the minimum distance requirement, that is, the minimum axle section length is:

[0059] D_min_sdd_1≥D_min_adj_axle

[0060] Wherein, D_min_sdd_1 is the minimum track section length, and D_min_adj_axle is the minimum axle head distance.

[0061] Scenario 2: As shown in Figure 3As shown, when the train runs to the SDD(N) section parking, the axle counter head S1 is the head of the train entering the N section, and S2 is the terminal head of the train leaving the N section. When the train head wheel passes through the S1 head, the section N becomes the occupied state, and two wheel pairs enter, and when the train head two wheel pairs pass through the S2 head and stop, but the subsequent wheel pairs of the train have not yet pressed into the S1 head, because the N section calculates the same number of wheel pairs entering and leaving the train, the system will change the N section to the clear state, but in fact the N section is still in the occupied state (the train actually occupies the N section). To avoid this situation, the minimum length of the track section is:

[0062] D_min_sdd_2≥D_max_adj_wheel+2×D_joint

[0063] Where D_max_adj_wheel is the maximum distance between adjacent wheel pairs of the train, and D_joint is the detection uncertainty distance of the axle counter head.

[0064] Scenario 3: As shown in Figure 4 , when the train runs on the line, the length of the track section divided by the axle counter system device should ensure that the system can detect the occupation of the track section, that is, the occupied state calculated by the N section system should be earlier than the clear state of the section. In this scenario, the minimum length of the track section is related to the maximum running speed of the line, the train parameters, the axle counter system delay, the relay delay, the interlocking system delay and other factors. As shown in the following figure, when the train passes through SDD(N) from left to right, considering the extreme case, when the train enters the N section of the initial axle counter head S1, the time used by the system to calculate the occupied state is the maximum occupation delay of the system, and when the train clears the terminal axle counter head S2 of the N section, the time used is the minimum clear delay of the system. To ensure that the occupied state is earlier than the clear state, then:

[0065] D_min_sdd_3≥(t_max_occp_dely(N)-t_min_libr_dely(N))×v_max+2×D_joint-D_max_wheel

[0066] Where D_min_sdd_3 is the minimum length of the track section, t_max_occp_dely(N) is the maximum occupation delay of section N, t_min_libr_dely(N) is the minimum clear delay of section N, v_max is the maximum running speed of the line, D_joint is the detection uncertainty distance of the axle counter head, and D_max_wheel is the maximum distance between the outermost wheel pairs of the train.

[0067] t_max_occp_dely(N)-t_min_libr_dely(N) needs to consider the delay performance of the axle counter system, the relay, and the interlocking system:

[0068] t_max_occp_dely(N)-t_min_libr_dely(N)=(t_sds_drop_max+t_relay_drop_max+t_cbi_input_max+t_cbi_cycle)-(t_sds_rise_min+t_relay_rise_min+t_cbi_input_min)

[0069] Among them, t_sds_drop_max is the maximum delay for the axle counting system to calculate the usage, t_relay_drop_max is the maximum delay for the relay to drop, t_cbi_input_max is the maximum delay for the interlocking system to obtain the relay status, t_cbi_cycle is the internal calculation cycle of the interlocking system, t_sds_rise_min is the minimum delay for the axle counting system to calculate the clearing, t_relay_rise_min is the minimum delay for the relay to pick up, and t_cbi_input_min is the minimum delay for the interlocking system to obtain the relay status.

[0070] Scenario 4: such as Figure 5 As shown, during train operation, to ensure the system can sequentially calculate the occupancy status of sections, the occupancy status of section N must precede that of section N+1. In this scenario, the minimum length of the track section is related to factors such as the maximum operating speed of the line, train parameters, axle counting system delay, relay delay, and interlocking system delay. As shown in the diagram, when the train passes SDD(N) and SDD(N+1) from left to right, considering the extreme case, when the train enters the initial axle counting head S1 of section N, the time taken for the system to calculate the occupancy status is the maximum system occupancy delay, and the time taken for the train to enter the initial axle counting head S2 of section N+1 is the minimum system occupancy delay. To ensure that the occupancy status of SDD(N) precedes that of SDD(N+1), then:

[0071] D_min_sdd_4≥(t_max_occp_dely(N)-t_min_occp_dely(N+1))×v_max+2×D_joint

[0072] Where D_min_sdd_4 is the minimum segment length, t_max_occp_dely(N) is the maximum occupancy delay of segment N, t_min_occp_dely(N+1) is the minimum occupancy delay of segment N+1, v_max is the maximum operating speed of the line, and D_joint is the detection uncertainty distance of the axle head.

[0073] The values ​​t_max_occp_dely(N)-t_min_occp_dely(N+1) need to consider the delay performance of the axle counting system, relays, and interlocking systems.

[0074] t_max_occp_dely(N)-t_min_occp_dely(N+1)=(t_sds_drop_max+t_relay_drop_max+t_cbi_input_max+t_cbi_cycle)-(t_sds_drop_min+t_relay_drop_min+t_cbi_input_min)

[0075] Wherein, t_sds_drop_max is the maximum delay occupied by the axle counting system calculation, t_relay_drop_max is the maximum delay of the relay dropping, t_cbi_input_max is the maximum delay of the interlocking system acquiring the relay status, t_cbi_cycle is the interlocking internal calculation cycle, t_sds_drop_min is the minimum delay occupied by the axle counting system calculation, t_relay_drop_min is the minimum delay of the relay dropping, and t_cbi_input_min is the minimum delay of the interlocking system acquiring the relay status.

[0076] In summary, the minimum length of the track section on the line should be greater than the maximum value of the calculation results in the four scenarios, so as to avoid the occurrence of abnormal situations.

[0077] D_min_sdd=max(D_min_sdd_1,D_min_sdd_2,D_min_sdd_3,D_min_sdd_4)

[0078] The above is an introduction to the method embodiments. The following system embodiments will further illustrate the solution of the present invention.

[0079] like Figure 6 As shown, according to the actual situation of the line, after inputting the line parameters, vehicle parameters and equipment performance parameters, the tool automatically calculates the minimum track segment length under different scenarios based on the input parameters, and gives the minimum segment length that must be met when designing the line. The specific implementation steps are shown in the flowchart below, which is divided into an input unit 101, a comparison unit 102, a calculation unit 103 and an output unit 104.

[0080] (1) The input unit is divided into a line parameter input module, a vehicle parameter input module, and an equipment performance parameter input module, which are used to input the actual trackside parameters, train parameters, and performance parameters of the axle counting system, relays and interlocking systems used in different projects.

[0081] (2) The comparison and selection unit is divided into a line parameter local optimization input module and a vehicle parameter comparison and selection module. Since the line parameters input in the input unit are all global parameters, such as maximum speed limit, if the calculation result at a certain position of the line does not meet the requirement, the parameters need to be optimized and modified locally through the module. The vehicle parameter comparison and selection module functions to select the parameter value that meets the requirement in different vehicle parameters when different vehicle types are used in the line, such as the adjacent wheel pair distance parameter.

[0082] (3) The calculation unit is to calculate the minimum section length of the four scenes according to the calculation formula given in the above four scenes, according to the input parameters of the input unit and the comparison and selection unit.

[0083] (4) The output unit is to display the calculation results of the four scenes calculated by the calculation unit, and give the minimum section length that needs to be met by the system.

[0084] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the described modules can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0085] The electronic device includes a central processing unit (CPU) that can perform various appropriate actions and processes according to computer program instructions stored in a read-only memory (ROM) or loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for device operation can also be stored. The CPU, ROM, and RAM are connected to each other through a bus. An input / output (I / O) interface is also connected to the bus.

[0086] A plurality of components in the device are connected to the I / O interface, including: an input unit such as a keyboard, a mouse, etc.; an output unit such as various types of displays, a speaker, etc.; a storage unit such as a magnetic disk, an optical disk, etc.; and a communication unit such as a network card, a modem, a wireless communication transceiver, etc. The communication unit allows the device to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunications networks.

[0087] The processing units perform the various methods and processes described above, such as the inventive methods. For example, in some embodiments, the inventive methods can be implemented as a computer software program tangibly embodied in a machine readable medium, such as a storage unit. In some embodiments, portions of or all of the computer program can be loaded and / or installed onto the device via, e.g., the ROM and / or the communications unit. When the computer program is loaded onto the RAM and executed by the CPU, one or more of the steps of the inventive methods described above can be performed. Alternatively, in other embodiments, the CPU can be configured to perform the inventive methods by way of other means, such as by way of firmware.

[0088] The functionality described above in this document can be performed, at least in part, by one or more hardware logic components. For example, and without limitation, illustrative types of hardware logic components that can be used include Field-programmable Gate Arrays (FPGAs), Application-specific Integrated Circuits (ASICs), Application-specific Standard Products (ASSPs), System-on-a-chip systems (SOCs), Complex Programmable Logic Devices (CPLDs), etc.

[0089] Program code for carrying out the methods of the present application can be written in any combination of one or more programming languages. This program code can be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the program code, when executed by the processor or controller, produces a means for implementing the functions / acts specified in the flowcharts and / or block diagrams. The program code can be retrieved from a machine-readable medium or device, a storage medium, a memory medium, a tangible medium, or a non-transitory medium. The program code can be executed by a machine, such as a computer, which can be a special purpose computer or a general purpose computer. The program code can be executed by a controller or a processor, which can be a special purpose controller or a general purpose controller.

[0090] In the context of the present application, a machine-readable medium can be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can include but is not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine-readable storage medium will include one or more lines of a computer program code, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0091] The above describes the specific calculation method and the automatic system of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0092] The system structure, internal composition and performance parameters of the axle counting system and interlocking equipment in the rail transit field, and its own working process are not within the protection scope required by the present application, and the present application only considers the calculation method and the automatic calculation system of the minimum track section length in the signal system.

Claims

1. A method of calculating the minimum length of a section of track, characterized in that, The method firstly identifies a fault scenario caused by too small track section length, secondly inputs actual parameters of the line, and finally automatically calculates the minimum length of the section under different fault scenarios, and selects the maximum minimum length of the section in different fault scenarios as the final minimum track section length; The fault scenarios include: Scenario 1: interference exists between adjacent axle counters, resulting in incorrect section occupancy and clearance information; Scenario 2: when a train does not leave a certain track section, the track section is incorrectly changed from the occupied state to the clearance state; Scenario 3: when a train passes through a certain track section, the system does not detect the occupancy of the track section; Scenario 4: when a train sequentially passes through track sections, the system has inconsistent occupancy sequence; The minimum track section length of scenario 3 is calculated as follows: D_min_sdd_3≥(t_max_occp_dely(N)-t_min_libr_dely(N))×v_max +2×D_joint-D_max_wheel Wherein, D_min_sdd_3 is the minimum track section length of scenario 3, t_max_occp_dely(N) is the maximum occupancy delay of section N, t_min_libr_dely(N) is the minimum clearance delay of section N, v_max is the maximum running speed of the line, D_joint is the detection uncertainty distance of the axle counter, and D_max_wheel is the maximum distance between the outermost wheelsets of the train.

2. The method of claim 1, wherein, The minimum track section length of scenario 1 is calculated as follows: D_min_sdd_1≥D_min_adj_axle Wherein, D_min_sdd_1 is the minimum track section length of scenario 1, and D_min_adj_axle is the minimum axle counter distance.

3. The method of claim 1, wherein, The minimum track section length of scenario 2 is calculated as follows: D_min_sdd_2≥D_max_adj_wheel+2×D_joint Wherein, D_min_sdd_2 is the minimum track section length of scenario 2, D_max_adj_wheel is the maximum distance between adjacent wheelsets of the train, and D_joint is the detection uncertainty distance of the axle counter.

4. The method of claim 1, wherein, The t_max_occp_dely(N)-t_min_libr_dely(N) needs to consider the delay performance of the axle counting system, the relay, and the interlocking system, and is calculated as follows: t_max_occp_dely(N)-t_min_libr_dely(N)= (t_sds_drop_max+t_relay_drop_max+t_cbi_input_max+t_cbi_cycle) -(t_sds_rise_min+t_relay_rise_min+t_cbi_input_min) Wherein, t_sds_drop_max is the maximum delay of axle counting system calculation occupation, t_relay_drop_max is the maximum delay of relay drop, t_cbi_input_max is the maximum delay of interlocking system getting relay state, t_cbi_cycle is the internal calculation cycle of interlocking, t_sds_rise_min is the minimum delay of axle counting system calculation, t_relay_rise_min is the minimum delay of relay rise, t_cbi_input_min is the minimum delay of interlocking system getting relay state.

5. The method of claim 1, wherein, The minimum section length of the track in the scene 4 is calculated as follows: D_min_sdd_4≥(t_max_occp_dely(N)-t_min_occp_dely(N+1))×v_max +2×D_joint Wherein, D_min_sdd_4 is the minimum section length of the scene 4, t_max_occp_dely(N) is the maximum occupation delay of section N, t_min_occp_dely(N+1) is the minimum occupation delay of section N+1, v_max is the maximum running speed of the line, and D_joint is the detection uncertainty distance of axle head.

6. The method of claim 5, wherein, The t_max_occp_dely(N)-t_min_occp_dely(N+1) needs to consider the delay performance of axle counting system, relay and interlocking system, and the specific calculation process is as follows: t_max_occp_dely(N)-t_min_occp_dely(N+1)= (t_sds_drop_max+t_relay_drop_max+t_cbi_input_max+t_cbi_cycle) -(t_sds_drop_min+t_relay_drop_min+t_cbi_input_min) Wherein, t_sds_drop_max is the maximum delay of axle counting system calculation occupation, t_relay_drop_max is the maximum delay of relay drop, t_cbi_input_max is the maximum delay of interlocking system getting relay state, t_cbi_cycle is the internal calculation cycle of interlocking, t_sds_drop_min is the minimum delay of axle counting system calculation occupation, t_relay_drop_min is the minimum delay of relay drop, and t_cbi_input_min is the minimum delay of interlocking system getting relay state.

7. A system for use in the method of claim 1, wherein, The system comprises: An input unit for inputting parameters of a line; A comparison and selection unit for inputting parameters of a line and comparing and selecting parameters of a vehicle; A calculation unit for calculating minimum section lengths of multiple scenes according to input parameters of the input unit and the comparison and selection unit according to calculation formulas of the multiple scenes; An output unit for displaying calculation results of the multiple scenes calculated by the calculation unit and giving minimum section lengths required by the system.

8. The system of claim 7, wherein, The input unit comprises a line parameter input module, a vehicle parameter input module and a device performance parameter input module, which are used for inputting different actual trackside parameters, train parameters and performance parameters of the axle counting system, relay and interlocking system used.

9. The system of claim 7, wherein, The comparison and selection unit comprises: a line parameter local optimization input module, which is used for performing local optimization modification of the parameters; a vehicle parameter comparison and selection module, which is used for performing parameter comparison and selection to select parameter values meeting the requirements from different vehicle type parameters.

10. An electronic device comprising a memory and a processor, said memory having stored thereon a computer program, characterized in that, The processor executes the program to implement the method in any one of claims 1-6.

11. A computer readable storage medium having stored thereon a computer program, characterized in that The program is executed by the processor to implement the method in any one of claims 1-6.

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