Background processing method for CTCS-2-level train control vehicle-mounted system

Abstract

The invention provides a background processing method for a CTCS-2-level train control vehicle-mounted system, which is used for processing train control data of the CTCS-2-level train control vehicle-mounted system in a CTCS-2-level background non-train control state. The data security of the CTCS-2-level train control vehicle-mounted system switching from the CTCS-2-level background non-train control state to the CTCS-2-level foreground train control state is guaranteed, the method can be suitable for being switched to train control vehicle-mounted systems of other systems or levels to control train operation, and the method has great practical value.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit train control on-board systems, and in particular to a background processing method for a CTCS-2 level train control on-board system. Background Art

[0002] In the field of rail transit train control on-board system technology, the level switching between CTCS-3 and CTCS-2 train control on-board systems has been maturely used in trunk railways. Usually, the CTCS-3 on-board system and the CTCS-2 on-board system are independently set up, or when the same cabinet is used, the CTCS-3 on-board core module and the CTCS-2 on-board core module are independently set up. When the CTCS-2 on-board system is in the background operation, it still operates normally, but its output is cut off by hardware. In the existing implementation scheme, the CTCS-2 background operation condition will be unclear, some unnecessary calculations will be performed, and faults will easily occur, resulting in level switching failure. Therefore, it is an urgent problem to design an independent CTCS-2 train control on-board system background processing method to adapt to the function of switching with a variety of other standards or levels of train control on-board systems.

[0003] In addition, in the field of urban rail transit, the CBTC onboard system used is different from the train control onboard system of the railway CTCS system. In order to realize the standard switching between the CTCS-2 level train control onboard system of trunk railways, intercity railways, and urban (suburban) railways and the CBTC train control onboard system of urban rail transit, the research on the operation data processing and control technology of the CTCS-2 level train control onboard system in the background non-control state is of great significance.

[0004] It should be understood that the above statements merely provide background technology related to the present invention and do not necessarily constitute prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a CTCS-2 level train control on-board system background processing method to ensure the data security of the CTCS-2 level train control on-board system when switching from the CTCS-2 level background non-car control state to the CTCS-2 level front-end car control state.

[0006] In order to achieve the above-mentioned object, the present invention provides a background processing method for a CTCS-2 level train control on-board system, comprising the following steps: S1, the CTCS-2 level train control on-board system is in the CTCS-2 level front-end train control state, and receives train control data to control the normal operation of the train. When it is necessary to switch to another standard or level of train control on-board system to control the operation of the train, the CTCS-2 level train control on-board system receives an input signal from the train that the CTCS-2 level train control state is invalid, and the CTCS-2 level train control on-board system is switched from the CTCS-2 level front-end train control state to the CTCS-2 level back-end non-train control state; S2, the CTCS-2 level train control on-board system continuously receives train control data; S3, in the CTCS-2 level back-end non-train control state, the CTCS- The Level 2 train control on-board system processes the train control data received in S2; S4, when in the CTCS-2 level background non-train control state, and when it is necessary to switch from a train control on-board system of another standard or level to the CTCS-2 level foreground train control state, the CTCS-2 level train control on-board system continues to receive input signals from the train until the input signal is that the CTCS-2 level train control state is valid, and then goes to S5; S5, the CTCS-2 level train control on-board system determines whether the current state meets the CTCS-2 level foreground train control conditions; if so, the CTCS-2 level train control on-board system switches from the CTCS-2 level background non-train control state to the CTCS-2 level foreground train control state; if not, the CTCS-2 level foreground train control conditions are not met, and emergency braking is output.

[0007] Preferably, in said S2, the vehicle control data of the CTCS-2 level train control on-board system includes a low-frequency code from the track circuit and a response data from the ground transponder.

[0008] The low-frequency code from the track circuit is received by the track circuit reader and the antenna, and the response data from the ground transponder is received by the transponder receiving unit and the antenna.

[0009] Preferably, the response data of the ground transponder includes: line speed limit, line slope, temporary speed limit, special section, track circuit information, transponder link information and large-number switch speed limit information.

[0010] Preferably, in S3, when the train enters or leaves the station on the siding, the CTCS-2 level train control on-board system deletes the train control data when any of the following conditions are met: the siding entry transponder is lost; or, the siding exit transponder is lost; or, the siding entry receives a default message; or, the exit signal with a transponder receives a default message on the track circuit; or, the low-frequency code of the track circuit received after the siding receives the train is a UU / UUS code allowing the signal to depart.

[0011] Preferably, in S3, when the train passes through the siding, the CTCS-2 level train control on-board system deletes the train control data when the following conditions are met: the low-frequency code of the track circuit received at the siding departure is a UU / UUS code; and the type of the exit signal is not an "exit signal with transponder"; and the train position exceeds the specified distance of the entry signal position; and is on the exit signal track circuit; and, when the UU / UUS code is used, the normal braking intervention speed is <50km / h, otherwise, when the large-number turnout is valid, the normal braking intervention speed is <(turnout speed limit + 5).

[0012] Preferably, in S3, when the train departs from the siding, the CTCS-2 train control on-board system deletes the train control data when the following conditions are met: the train is located in the station; and the low-frequency code of the track circuit is changed from HU / HB code to UU / UUS code.

[0013] Preferably, in S3, when the transponder link information cannot cover the entry / exit transponder, the CTCS-2 train control on-board system deletes the train control data when the following conditions are met: the train is in the entry / approach / exit signal track section; and the low-frequency code of the current track circuit is the UU / UUS code; and the CTCS-2 train control on-board system has not received the transponder link information or a transponder has been lost and the transponder link information has not been received again.

[0014] Preferably, in S3, if the transponder link information is valid, the low-frequency code of the track circuit received on the entry / exit and approach signal track section is a UU / UUS code, and when the transponder is lost or the transponder message is wrong, the CTCS-2 level train control on-board system deletes the train control data; if the transponder link information is invalid, when entering the entry / exit and approach signal track section, the low-frequency code of the track circuit received is a UU / UUS code, and the CTCS-2 level train control on-board system deletes the train control data.

[0015] Preferably, in S3, if the vehicle control data is incomplete, that is, any one of the line speed limit, line slope, temporary speed limit, track circuit information, and transponder link information is invalid, and the received low-frequency code of the track circuit is a UU / UUS code, the CTCS-2 level train control on-board system deletes the vehicle control data.

[0016] Preferably, in said S3, when the CTCS-2 level train control on-board system has the vehicle control data, if it fails to perform position correction through the transponder when exceeding the limit distance or the distance for position correction according to the linked transponder is greater than the maximum error, then the CTCS-2 level train control on-board system controls the vehicle data.

[0017] Preferably, in the S3, when the train enters the track section of the entry signal and the low-frequency code of the received track circuit is a UU / UUS code, the CTCS-2 level train control on-board system deletes the special section information whose starting point position is greater than the entry signal position; when the train enters the approach / exit signal track section and the low-frequency code of the received track circuit is a UU / UUS code, the special section information is valid and is not received in the station, then the CTCS-2 level train control on-board system deletes the special section information whose starting point position is greater than the exit signal position.

[0018] Preferably, in said S3, when the track circuit code received by the CTCS-2 level train control onboard system is an HB code, the CTCS-2 level train control onboard system deletes the train control data.

[0019] Preferably, in said S3, after receiving the default message, the CTCS-2 level train control on-board system deletes the train control data.

[0020] Preferably, in the above S4, the front-end vehicle control conditions at CTCS-2 level include two types: mode curve monitoring and fixed speed monitoring.

[0021] Among them, the mode curve monitoring is manifested as follows: in the CTCS-2 level background non-control state, the mode curve can be calculated and the conditions for controlling the train are met; the fixed speed monitoring is manifested as follows: in the CTCS-2 level background non-control state, the conditions for calculating the mode curve are not met, but the train operation is monitored at a fixed speed greater than 0.

[0022] Preferably, the train control condition before CTCS-2 level control is pattern curve monitoring, which switches to full monitoring mode and monitors the train operation according to the dynamic pattern curve; the train control condition before CTCS-2 level control is fixed speed monitoring, which switches to partial monitoring mode and monitors the train operation at a fixed speed of 45km / h.

[0023] Preferably, in S4, when all of the following conditions are met, the on-board system outputs the CTCS-2 level vehicle control condition as mode curve monitoring: the line speed limit, line slope, temporary speed limit, track circuit information, and transponder link information of the current train position are all valid; and the received track circuit low-frequency code is L5 / L4 / L3 / L2 / L / LU / U2 / U2S / UU / UUS / HU code; and the carrier frequency described in the track circuit information is consistent with the track circuit carrier frequency from TCR

[0024] Preferably, in S4, when all of the following conditions are met, the on-board system outputs the CTCS-2 level vehicle control condition as fixed speed monitoring: the mode curve monitoring is not met; and the received low-frequency code of the track circuit is not a prohibition code.

[0025] Preferably, when any of the CTCS-2 level front-end train control conditions is met, the CTCS-2 level train control on-board system can proceed to step S5 to continue operation.

[0026] Preferably, in the above S4, if the current state of the CTCS-2 level train control on-board system does not meet the CTCS-2 level front-end train control conditions, emergency braking is output.

[0027] Preferably, when any of the following conditions is met, the on-board system outputs the CTCS-2 level train control condition as not meeting the train control condition: the CTCS-2 level train control on-board system fails and shuts down; the mode curve monitoring condition is not met, and the low-frequency code received from the track circuit is a prohibition code.

[0028] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned CTCS-2 level train control on-board system background processing method is implemented.

[0029] The present invention also provides an electronic device, including a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the above-mentioned CTCS-2 level train control on-board system background processing method is implemented.

[0030] In summary, compared with the prior art, the background processing method of the CTCS-2 level train control vehicle system provided by the present invention has at least the following beneficial effects:

[0031] (1) An innovative background mode for the CTCS-2 train control onboard system is proposed. When the CTCS-2 train control onboard system is in the CTCS-2 background non-control state, it always maintains a background mode, which simplifies the operating conditions of the CTCS-2 train control onboard system.

[0032] (2) A data processing method in the CTCS-2 background mode is proposed to ensure the data security of the CTCS-2 train control onboard system when it switches from the CTCS-2 background non-train control state to the CTCS-2 foreground train control state;

[0033] (3) The output signal of the CTCS-2 level train control on-board system in the CTCS-2 level background non-control state is proposed, which can be applied to the switching of different levels or standards such as the CTCS-3 level train control on-board system and the CBTC on-board system, and has great practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a specific flow chart of the background processing method of the CTCS-2 level train control on-board system in the present invention. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1 , the present invention is further explained by describing a preferred specific embodiment in detail.

[0036] It should be noted that the drawings are in a very simplified form and use non-precise proportions. They are only used to conveniently and clearly assist in explaining the embodiments of the present invention, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0037] It should be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only the elements explicitly listed, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] like Figure 1 As shown, the present invention provides a CTCS-2 level train control vehicle system background processing method, comprising the following steps:

[0039] S1, CTCS-2 train control onboard system is in the CTCS-2 front-end train control state, and it receives train control data to control the normal operation of the train. When it is necessary to switch to other types or levels of train control onboard systems to control the train operation, the CTCS-2 train control onboard system receives input signals from the train that the CTCS-2 train control state is invalid, and the CTCS-2 train control onboard system changes from the CTCS-2 front-end train control state to the CTCS-2 back-end non-train control state;

[0040] S2, CTCS-2 level train control onboard system continuously receives train control data;

[0041] S3, in the CTCS-2 level background non-vehicle control state, the CTCS-2 level train control vehicle-mounted system processes the vehicle control data received in S2;

[0042] S4: In the CTCS-2 level backstage non-control state, when it is necessary to switch from other types or levels of train control onboard systems to the CTCS-2 level frontstage control state, the CTCS-2 level train control onboard system continues to receive input signals from the train until the input signal indicates that the CTCS-2 level control state is valid, and then go to S5;

[0043] S5. The CTCS-2 train control on-board system determines whether the current state meets the CTCS-2 front-end vehicle control conditions. If so, the CTCS-2 train control on-board system changes from the CTCS-2 back-end non-vehicle control state to the CTCS-2 front-end vehicle control state. If not, the CTCS-2 front-end vehicle control conditions are not met, and emergency braking is output.

[0044] Furthermore, it should be noted that in the above S1, the CTCS-2 level vehicle control status includes valid and invalid. When the CTCS-2 level vehicle control status is valid, the vehicle-mounted system is in the CTCS-2 level foreground vehicle control status; when the CTCS-2 level vehicle control status is invalid, the vehicle-mounted system is in the CTCS-2 level background non-vehicle control status.

[0045] Furthermore, the vehicle control data of the CTCS-2 level train control on-board system includes the low-frequency code from the track circuit and the response data from the ground transponder; it can be understood that, in the present invention, when the CTCS-2 level train control on-board system is in the CTCS-2 level background non-vehicle control state, the CTCS-2 level train control on-board system normally receives the aforementioned low-frequency code from the track circuit and the response data from the ground transponder.

[0046] Specifically, the CTCS-2 level train control on-board system receives the low-frequency code of the track circuit through the track circuit reader (TCR) and the antenna, and receives the response data through the transponder receiving unit (Balise Trackside Module, BTM) and the antenna.

[0047] Among them, the response data of the ground transponder includes: line speed limit, line slope, temporary speed limit, special sections (bridges, tunnels, phase separation areas), track circuit information, transponder link information and large-number switch speed limit information, etc.

[0048] It can be understood that in the present invention, since the CTCS-2 level train control on-board system must ensure the validity of the data when switching from the CTCS-2 level background non-car control state to the CTCS-2 level front-end car control state, it is necessary to avoid the occurrence of a situation where the car control data used by the CTCS-2 level train control on-board system (i.e., the low-frequency code of the track circuit and the response data of the ground transponder) does not match the actual route due to route changes or ground signal abnormalities. Therefore, the CTCS-2 level train control on-board system needs to process the low-frequency code from the track circuit and the response data from the ground transponder in real time when it is in the background non-car control state.

[0049] Furthermore, in S3, the vehicle control data (i.e., the low-frequency code of the track circuit and the response data of the ground transponder) is processed in real time, which specifically includes the following contents:

[0050] A1:

[0051] When a train enters or leaves a station on a siding, the CTCS-2 train control system deletes the train control data if any of the following conditions are met:

[0052] The siding entry transponder is missing;

[0053] or, the lateral outbound transponder is lost;

[0054] or, the siding entry receives a default message;

[0055] or, a default message is received on the track circuit of an outbound signal with a balise;

[0056] Or, after the siding receives the train, the low-frequency code received from the track circuit is the UU / UUS code, allowing the signal to depart.

[0057] A2:

[0058] When a train passes through a siding, the CTCS-2 train control system deletes the train control data when all of the following conditions are met:

[0059] The low-frequency code of the track circuit received when the siding departs is the UU / UUS code;

[0060] And, the type of the outbound signal is not "outbound signal with balise";

[0061] Furthermore, the train position exceeds the position of the station entry signal by a limited distance; wherein, in a preferred embodiment of the present invention, the limited distance is 100 meters;

[0062] and, is on the outbound signal track circuit;

[0063] Moreover, when the UU / UUS code is used, the common braking intervention speed is <50km / h (referring to the time taken by the vehicle to increase its speed from a stationary state to 50km / h). Otherwise, when the large-number turnout is valid, the common braking intervention speed is < (turnout speed limit + 5).

[0064] A3:

[0065] When a train is departing from a siding, the CTCS-2 train control system deletes the train control data when all of the following conditions are met:

[0066] The train is located inside the station;

[0067] In addition, the low-frequency code of the track circuit is changed from HU / HB code to UU / UUS code.

[0068] A4:

[0069] When the balise link information cannot cover the entry / exit balise, the CTCS-2 train control system deletes the train control data when the following conditions are met:

[0070] The train is in the track section with entry / approach / exit signal;

[0071] Moreover, the low frequency code of the current track circuit is UU / UUS code;

[0072] Furthermore, the CTCS-2 level train control onboard system has not received any balise link information or a balise has been lost and the balise link information has not been received again.

[0073] A5:

[0074] If the balise link information is valid, the low-frequency code of the track circuit received on the entry / exit and approach signal track sections is UU / UUS code. When there is a balise loss or balise message error, the CTCS-2 train control onboard system deletes the existing train control data.

[0075] If the balise link information is invalid, when entering the entry / exit and approach signal track sections, the low-frequency code received from the track circuit is the UU / UUS code, and the CTCS-2 train control onboard system deletes the existing line data.

[0076] A6:

[0077] If the train control data is incomplete, that is, any of the line speed limit, line slope, temporary speed limit, track circuit information, and transponder link information is invalid, and the received track circuit low-frequency code is a UU / UUS code, the CTCS-2 train control onboard system deletes the train control data;

[0078] When the train control data is complete and has transponder link information, the CTCS-2 level train control on-board system does not delete the train control data.

[0079] A7:

[0080] When the CTCS-2 train control on-board system has train control data, if the position correction is not performed through the balise when the limit distance is exceeded or the distance for position correction based on the linked balise is greater than the maximum error distance, the CTCS-2 train control on-board system deletes the train control data; wherein, considering the safety of train operation, in a preferred embodiment of the present invention, the limit distance is 7 km and the maximum error distance is 140 m.

[0081] A8:

[0082] When the train enters the track section of the station entry signal and the low-frequency code of the track circuit received is the UU / UUS code, the CTCS-2 level train control onboard system deletes the special section information whose starting position of the special section is greater than the position of the station entry signal;

[0083] When the train enters the track section of the approach / exit signal and the low-frequency code of the received track circuit is the UU / UUS code, the special section information is valid and is not newly received in the station, then the CTCS-2 level train control onboard system deletes the special section information whose starting point position is greater than the exit signal position.

[0084] A9:

[0085] When the track circuit code received by the CTCS-2 train control onboard system is the HB code, the CTCS-2 train control onboard system deletes the train control data.

[0086] A10:

[0087] After receiving the default message, the CTCS-2 level train control on-board system deletes the train control data.

[0088] It should be noted that, in the S4, the CTCS-2 level foreground train control conditions include two types: mode curve monitoring and fixed speed monitoring; wherein, the mode curve monitoring is manifested as: in the CTCS-2 level background non-train control state, the mode curve can be calculated and the train control conditions are met; the fixed speed monitoring is manifested as: in the CTCS-2 level background non-train control state, the conditions for calculating the mode curve are not met, but the train operation is monitored at a fixed speed greater than 0; it can be understood that when any of the aforementioned CTCS-2 level foreground train control conditions is met, the CTCS-2 level train control on-board system can go to S5 and proceed to the next step.

[0089] Specifically, if the foreground vehicle control condition of CTCS-2 level is pattern curve monitoring, it will switch to full monitoring mode and monitor the train operation according to the dynamic pattern curve; if the foreground vehicle control condition of CTCS-2 level is fixed speed monitoring, it will switch to partial monitoring mode and monitor the train operation at a fixed speed of 45km / h; if the CTCS-2 level on-board system does not have the vehicle control conditions, it should not switch to the foreground vehicle control state of CTCS-2 level, and emergency braking should be output.

[0090] Furthermore, in the above S4, the CTCS-2 level train control onboard system determines whether the current state meets the CTCS-2 level front-end train control conditions, which specifically includes the following contents:

[0091] B1.

[0092] When all of the following conditions are met, the CTCS-2 train control system outputs the CTCS-2 train control condition as mode curve monitoring:

[0093] The line speed limit, line slope, temporary speed limit, track circuit information, and balise link information at the train's current position are all valid;

[0094] Moreover, the low frequency code received from the track circuit is L5 / L4 / L3 / L2 / L / LU / U2 / U2S / UU / UUS / HU code;

[0095] Furthermore, the carrier frequency of the low frequency code of the track circuit is consistent with the carrier frequency of the track circuit from the TCR.

[0096] B2,

[0097] When all of the following conditions are met, the CTCS-2 train control system outputs the CTCS-2 train control condition as fixed speed monitoring:

[0098] The mode curve monitoring is not satisfied;

[0099] Furthermore, the received low-frequency code of the track circuit is not a prohibited code (no code, HU code, H code).

[0100] B3,

[0101] When any of the following conditions are met, the CTCS-2 train control onboard system outputs the CTCS-2 train control condition as no train control condition:

[0102] CTCS-2 level train control onboard system failure downtime;

[0103] The mode curve monitoring conditions are not met, and the low-frequency code received from the track circuit is a prohibition code.

[0104] In summary, in the present invention, when the CTCS-2 level train control onboard system receives that the CTCS-2 level control vehicle state is invalid, it enters the CTCS-2 level train control onboard system background mode, and the CTCS-2 level train control onboard system always maintains only this mode in the CTCS-2 level background non-control vehicle state; when the CTCS-2 level train control onboard system receives that the CTCS-2 level control vehicle state is valid and can meet the CTCS-2 level foreground control vehicle state, the CTCS-2 level train control onboard system switches to CTCS -2 level foreground train control state, transferred from CTCS-2 level backstage non-train control state. At this time, if the foreground train control condition of CTCS-2 level is pattern curve monitoring, it will switch to full monitoring mode and monitor the train operation according to the dynamic pattern curve; if the foreground train control condition of CTCS-2 level is fixed speed monitoring, it will switch to partial monitoring mode and monitor the train operation at a fixed speed of 45km / h; if the CTCS-2 level on-board system does not have the conditions for train control, it should not switch to the foreground train control state of CTCS-2 level, and should output emergency braking.

[0105] In summary, the present invention provides a background processing method for a CTCS-2 level train control on-board system, which innovatively proposes a background mode for the CTCS-2 level train control on-board system. When the CTCS-2 level train control on-board system is in the CTCS-2 level background non-controlled vehicle state, it always maintains a background mode, which simplifies the operating conditions of the CTCS-2 level train control on-board system; proposes a data processing method under the CTCS-2 level background mode, which ensures the data security of the CTCS-2 level train control on-board system when switching from the CTCS-2 level background non-controlled vehicle state to the CTCS-2 level front-end controlled vehicle state; proposes an output signal of the CTCS-2 level train control on-board system in the CTCS-2 level background non-controlled vehicle state, which can be applied to switching with different levels or standards such as the CTCS-3 level train control on-board system and the CBTC on-board system, and has great practical value.

[0106] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A CTCS-2 level train control vehicle system background processing method, characterized in that: The following steps are involved: S1, CTCS-2 train control onboard system is in the CTCS-2 front-end train control state, and it receives train control data to control the normal operation of the train. When it is necessary to switch to other types or levels of train control onboard systems to control the train operation, the CTCS-2 train control onboard system receives input signals from the train that the CTCS-2 train control state is invalid, and the CTCS-2 train control onboard system changes from the CTCS-2 front-end train control state to the CTCS-2 back-end non-train control state; S2, CTCS-2 level train control onboard system continuously receives train control data; S3, in the CTCS-2 level background non-vehicle control state, the CTCS-2 level train control vehicle-mounted system processes the vehicle control data received in S2; S4: In the CTCS-2 level backstage non-control state, when it is necessary to switch from other types or levels of train control onboard systems to the CTCS-2 level frontstage control state, the CTCS-2 level train control onboard system continues to receive input signals from the train until the input signal indicates that the CTCS-2 level control state is valid, and then go to S5; S5. The CTCS-2 train control on-board system determines whether the current state meets the CTCS-2 front-end vehicle control conditions. If so, the CTCS-2 train control on-board system changes from the CTCS-2 back-end non-vehicle control state to the CTCS-2 front-end vehicle control state. If not, the CTCS-2 front-end vehicle control conditions are not met, and emergency braking is output.

2. The CTCS-2 level train control vehicle system background processing method according to claim 1, characterized in that: In the above S2, the train control data of the CTCS-2 level train control onboard system includes the low frequency code from the track circuit and the response data from the ground transponder; The low-frequency code from the track circuit is received by the track circuit reader and the antenna, and the response data from the ground transponder is received by the transponder receiving unit and the antenna.

3. The CTCS-2 level train control vehicle system background processing method according to claim 2, characterized in that: The response data of the ground transponder includes: line speed limit, line slope, temporary speed limit, special section, track circuit information, transponder link information and large-number turnout speed limit information.

4. The CTCS-2 level train control vehicle system background processing method according to claim 3, characterized in that: In S3, when the train enters or leaves the station on the siding, the CTCS-2 train control onboard system deletes the train control data when any of the following conditions are met: The siding entry transponder is missing; or, the lateral outbound transponder is lost; or, the siding entry receives a default message; or, a default message is received on the track circuit of an outbound signal with a balise; Or, after the siding receives the train, the low-frequency code of the track circuit received is the UU / UUS code, allowing the signal to depart.

5. The CTCS-2 level train control vehicle system background processing method according to claim 3, characterized in that: In S3, when the train passes the siding, the CTCS-2 train control onboard system deletes the train control data when the following conditions are met: The low-frequency code of the track circuit received when the siding departs is the UU / UUS code; And, the type of the outbound signal is not "outbound signal with balise"; Furthermore, the train position exceeds the specified distance of the station entry signal position; and, is on the outbound signal track circuit; Moreover, when the UU / UUS code is used, the normal braking intervention speed is <50km / h. Otherwise, when the large-number turnout is valid, the normal braking intervention speed is <(turnout speed limit + 5).

6. The CTCS-2 level train control vehicle system background processing method according to claim 3, characterized in that: In S3, when the train is departing from the siding, the CTCS-2 train control onboard system deletes the train control data when the following conditions are met: The train is located inside the station; In addition, the low-frequency code of the track circuit is changed from HU / HB code to UU / UUS code.

7. The CTCS-2 level train control vehicle system background processing method according to claim 3, characterized in that: In S3, when the transponder link information cannot cover the entry / exit transponder, the CTCS-2 train control onboard system deletes the train control data when the following conditions are met: The train is in the track section with entry / approach / exit signal; Moreover, the low frequency code of the current track circuit is UU / UUS code; Furthermore, the CTCS-2 level train control onboard system has not received any balise link information or a balise has been lost and the balise link information has not been received again.

8. The CTCS-2 level train control vehicle system background processing method according to claim 3, characterized in that: In the above S3, if the balise link information is valid, the low frequency code of the track circuit received on the entry / exit and approach signal track section is a UU / UUS code, and when there is a balise loss or balise message error, the CTCS-2 train control onboard system deletes the train control data; If the balise link information is invalid, when entering the entry / exit or approach signal track section, the low-frequency code received from the track circuit is the UU / UUS code, and the CTCS-2 train control onboard system deletes the train control data.

9. The CTCS-2 level train control vehicle system background processing method according to claim 3, characterized in that: In the above S3, if the vehicle control data is incomplete, that is, any one of the line speed limit, line slope, temporary speed limit, track circuit information, and transponder link information is invalid, and the received low-frequency code of the track circuit is a UU / UUS code, the CTCS-2 level train control on-board system deletes the vehicle control data.

10. The CTCS-2 level train control vehicle system background processing method according to claim 3, characterized in that: In the above S3, when the CTCS-2 level train control on-board system has the vehicle control data, if it fails to perform position correction through the transponder when exceeding the limit distance or the distance for position correction based on the linked transponder is greater than the maximum error, then the CTCS-2 level train control on-board system controls the vehicle data.

11. The CTCS-2 level train control vehicle system background processing method according to claim 3, characterized in that: In the above S3, when the train enters the track section of the station entry signal and the low-frequency code of the track circuit received is the UU / UUS code, the CTCS-2 level train control onboard system deletes the special section information whose starting position of the special section is greater than the position of the station entry signal; When the train enters the track section of the approach / exit signal and the low-frequency code of the received track circuit is UU / UUS code, the special section information is valid and is not received in the station, then the CTCS-2 level train control onboard system deletes the special section information whose starting position is greater than the exit signal position.

12. The CTCS-2 level train control vehicle system background processing method according to claim 3, characterized in that: In the above S3, when the track circuit code received by the CTCS-2 level train control onboard system is the HB code, the CTCS-2 level train control onboard system deletes the train control data.

13. The CTCS-2 level train control vehicle system background processing method according to claim 3, characterized in that: In the above-mentioned S3, after receiving the default message, the CTCS-2 level train control on-board system deletes the train control data.

14. The CTCS-2 level train control vehicle system background processing method according to claim 1, characterized in that: In the above-mentioned S4, the foreground vehicle control conditions at CTCS-2 level include two types: mode curve monitoring and fixed speed monitoring; The mode curve monitoring is as follows: in the CTCS-2 level background non-vehicle control state, the mode curve can be calculated and the vehicle control conditions are met; The fixed speed monitoring is manifested as: in the CTCS-2 level background non-control state, there is no condition for calculating the mode curve, but the train operation is monitored at a fixed speed greater than 0.

15. The CTCS-2 level train control vehicle system background processing method according to claim 14, characterized in that: The train condition before CTCS-2 level control is mode curve monitoring, which switches to full monitoring mode and monitors train operation according to dynamic mode curve; The front-end train control condition of CTCS-2 level is fixed speed monitoring, which switches to partial monitoring mode and monitors train operation at a fixed speed of 45km / h.

16. The CTCS-2 level train control vehicle system background processing method according to claim 14, characterized in that: In S4, when all of the following conditions are met, the vehicle-mounted system outputs the CTCS-2 level vehicle control condition as mode curve monitoring: The line speed limit, line slope, temporary speed limit, track circuit information, and balise link information at the train's current position are all valid; In addition, the received track circuit low-frequency code is L5 / L4 / L3 / L2 / L / LU / U2 / U2S / UU / UUS / HU code; Furthermore, the carrier frequency described in the track circuit information is consistent with the track circuit carrier frequency from the TCR.

17. The CTCS-2 level train control vehicle system background processing method according to claim 14, characterized in that: In S4, when all of the following conditions are met, the vehicle-mounted system outputs the CTCS-2 level vehicle control condition as fixed speed monitoring: The mode curve monitoring is not satisfied; Furthermore, the received low-frequency code of the track circuit is not a prohibition code.

18. The CTCS-2 level train control vehicle system background processing method according to claim 14, characterized in that: When any of the CTCS-2 level front-end train control conditions is met, the CTCS-2 level train control on-board system can proceed to step S5 to continue operation.

19. The CTCS-2 level train control vehicle system background processing method according to claim 1, characterized in that: In the above S4, if the current state of the CTCS-2 level train control on-board system does not meet the CTCS-2 level front-end train control conditions, emergency braking is output.

20. The CTCS-2 level train control vehicle system background processing method according to claim 18, characterized in that: When any of the following conditions are met, the vehicle system outputs the CTCS-2 level vehicle control condition as no vehicle control condition: CTCS-2 level train control onboard system failure downtime; The mode curve monitoring conditions are not met, and the low-frequency code received from the track circuit is a prohibition code.

21. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the CTCS-2 level train control vehicle-mounted system background processing method described in any one of claims 1 to 20 is implemented.

22. An electronic device, characterized in that: The invention comprises a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the background processing method of the CTCS-2 level train control vehicle-mounted system described in any one of claims 1 to 20 is implemented.

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