Method for transmitting low-frequency code sequence by train control center and method for processing low-frequency code sequence by vehicle-mounted equipment, and train control system

Abstract

The invention provides a method for transmitting a low-frequency code sequence by a train control center and processing the low-frequency code sequence by a vehicle-mounted device and a train control system, and the train control center not only can transmit the low-frequency code sequence to the vehicle-mounted device based on a track circuit interface, but also can directly transmit the low-frequency code sequence to the vehicle-mounted device based on wireless communication. Therefore, the problem that in the prior art, a train control center can only send low-frequency code sequence information to vehicle-mounted equipment through a single track circuit interface is solved. Under the scene of track circuit interface single-channel link failure, a train control center uses a redundant channel to continuously provide driving permission information for vehicle-mounted equipment, and the train operation efficiency and the line transport capacity are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of railway transport train control systems, and in particular to a method for a train control center to send a low-frequency code sequence, a vehicle-mounted device to process the low-frequency code sequence, and a train control system. Background Art

[0002] With the continuous development of my country's social economy, the demand for railway transportation is also increasing. The CTCS (China Train Control System)-2 train control system is currently the most widely used train control system in China. Train control center equipment, as a key component of the CTCS-2 train control system and the core of ground safety equipment, plays a vital role in the smoothness and safety of train operations.

[0003] The train control center equipment is one of the core units in the CTCS-2 level wayside equipment that controls the safe operation of trains. The track circuit interface is one of the core means for the train control center to actually control the train. By obtaining track section occupancy information from the track circuit interface and sending information such as the low-frequency driving code sequence to the track circuit interface, the train can be quickly and effectively informed of the safe travel range and speed ahead. Therefore, the availability and timeliness of the track circuit interface are particularly important.

[0004] Currently, the train control center can only send low-frequency code sequence information to the on-board equipment through the track circuit interface to complete the calculation of on-board driving permissions and speed curves. When a fault occurs at the train control center's sending port, or a fault occurs at the track circuit, or a fault occurs at the on-board receiving port, the train will take braking measures to temporarily stop, affecting the travel of the current and subsequent trains and the normal operation of the line.

[0005] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. Summary of the Invention

[0006] The present invention aims to provide a method for transmitting low-frequency code sequences from a train control center and processing them on-board equipment, as well as a train control system. This method addresses the existing problem of a train control center being able to transmit low-frequency code sequence information to on-board equipment only through a single track circuit interface. In the event of a single-channel link failure on the track circuit interface, the train control center can use redundant channels to continuously provide driving permission information to the on-board equipment, thereby improving train operation efficiency and line capacity.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A method for a train control center to send a low-frequency code sequence, applied to the train control center, comprising:

[0009] receiving the section occupancy status information sent by the track circuit and calculating the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence, wherein the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence are consistent;

[0010] Determine whether a fault occurs and the block section is occupied. If so, obtain the axle counter occupancy status information from the axle counter interface and determine whether the axle counter is occupied;

[0011] If the axle counter is idle, a visual driving command is sent to the intermediate on-board equipment closest to the rear of the fault-occupied block section via wireless communication, so that the intermediate on-board equipment drives the fault-occupied block section at a low speed in a visual mode. After the intermediate on-board equipment passes the fault-occupied block section normally, feedback information is sent to the train control center indicating that the fault-occupied block section is unexpectedly occupied.

[0012] Determine whether the feedback information of the intermediate on-board device is received. If so, treat the fault-occupied block partition as idle and recalculate the target wireless low-frequency code sequence, send the track circuit low-frequency code sequence to the on-board device through the track circuit, and send the target wireless low-frequency code sequence to the on-board device through wireless communication, where the target wireless low-frequency code sequence includes the position and length of the fault-occupied block partition.

[0013] Optionally, if no fault occurs to occupy the block section, the track circuit low-frequency code sequence is sent to the on-board equipment through the track circuit and the initial wireless low-frequency code is sent to the on-board equipment through wireless communication.

[0014] Optionally, if the axle counter is occupied, the track circuit low-frequency code sequence is sent to the on-board device via the track circuit and the initial wireless low-frequency code is sent to the on-board device via wireless communication.

[0015] Optionally, if the feedback information from the intermediate on-board device is not received, the track circuit low-frequency code sequence is sent to the on-board device via the track circuit and the initial wireless low-frequency code is sent to the on-board device via wireless communication.

[0016] A method for processing a low-frequency code sequence by an on-board device, applied to the on-board device, comprising:

[0017] Receive the track circuit low-frequency code sequence sent by the track circuit and the wireless low-frequency code sequence sent by the train control center;

[0018] Redundant calculation of driving permission and speed curve is performed based on the track circuit low-frequency code sequence and the wireless low-frequency code sequence.

[0019] Optionally, the redundant calculation of the driving permission and the speed curve according to the track circuit low-frequency code sequence and the wireless low-frequency code sequence includes:

[0020] Determining whether the track circuit low-frequency code sequence and the wireless low-frequency code are both valid;

[0021] If one is invalid, the driving permit and speed curve will be calculated according to the other one;

[0022] If both are valid, the track circuit low-frequency code sequence and the wireless low-frequency code are compared for consistency;

[0023] If the two are consistent, the driving permission and speed curve are calculated according to the track circuit low-frequency code sequence.

[0024] Optionally, the method further includes:

[0025] If the comparison between the two is inconsistent, the wireless low-frequency code sequence is analyzed to see whether it contains the fault-occupied block partition information. If not, the driving permission and speed curve are calculated according to the track circuit low-frequency code sequence. If it is contained, the driving permission and speed curve are calculated according to the wireless low-frequency code sequence.

[0026] A train control system includes a train control center, track circuits and on-board equipment, wherein:

[0027] The track circuit is used to: send section occupancy status information to the train control center;

[0028] The train control center is configured to: receive the section occupancy status information sent by the track circuit and calculate the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence, wherein the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence are consistent; determine whether a fault occupies the block section, and if so, obtain the axle counter occupancy status information from the axle counter interface and determine whether the axle counter is occupied; if the axle counter is idle, send a visual driving command to the intermediate on-board equipment closest to the rear of the fault-occupied block section via wireless communication, so that the intermediate on-board equipment drives the fault-occupied block section at a low speed in a visual mode. After the intermediate on-board equipment passes through the fault-occupied block section normally, it sends feedback information to the train control center indicating that the fault-occupied block section is unexpectedly occupied; determining whether the feedback information from the intermediate on-board equipment is received, and if so, treating the fault-occupied block section as idle and recalculating a target wireless low-frequency code sequence; sending the track circuit low-frequency code sequence to the on-board equipment via the track circuit, and sending the target wireless low-frequency code sequence to the on-board equipment via wireless communication, wherein the target wireless low-frequency code sequence includes the position and length of the fault-occupied block section;

[0029] The on-board device is used to: receive the track circuit low-frequency code sequence sent by the track circuit and the wireless low-frequency code sequence sent by the train control center; and perform redundant calculation of the driving permission and speed curve based on the track circuit low-frequency code sequence and the wireless low-frequency code sequence.

[0030] Optionally, the train control center is further configured to: if no fault occurs to occupy the block section, send the track circuit low-frequency code sequence to the on-board equipment via the track circuit and send the initial wireless low-frequency code to the on-board equipment via wireless communication.

[0031] Optionally, the train control center is further configured to: if the axle counter is occupied, send the track circuit low-frequency code sequence to the on-board device via the track circuit and send the initial wireless low-frequency code to the on-board device via wireless communication.

[0032] Optionally, the train control center is further configured to: if the feedback information from the intermediate on-board device is not received, send the track circuit low-frequency code sequence to the on-board device through the track circuit and send the initial wireless low-frequency code to the on-board device through wireless communication.

[0033] Optionally, the on-board device is specifically used to: determine whether the track circuit low-frequency code sequence and the wireless low-frequency code are both valid; if one is invalid, calculate the driving permission and speed curve according to the other; if both are valid, compare the track circuit low-frequency code sequence and the wireless low-frequency code for consistency; if the two are consistent, calculate the driving permission and speed curve according to the track circuit low-frequency code sequence.

[0034] Optionally, the on-board device is specifically used to: if the comparison between the two is inconsistent, analyze whether the wireless low-frequency code sequence contains fault-occupied block partition information; if not, calculate the driving permission and speed curve according to the track circuit low-frequency code sequence; if contained, calculate the driving permission and speed curve according to the wireless low-frequency code sequence.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] 1. Effectively solve the problem of the train control center sending a single channel of low-frequency code sequence to on-board equipment;

[0037] 2. Increase redundancy in determining track section status by installing a small number of axle counting devices in each section;

[0038] 3. When an unexpected fault occurs in the section and occupies the block section and is manually confirmed, the wireless low-frequency code sequence information can ensure that the on-board equipment passes through the fault block section at normal speed, thereby improving operational efficiency;

[0039] 4. Information can be continuously covered, enabling real-time communication between the train control center and on-board equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for the description. Obviously, the drawings described below are one embodiment of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort:

[0041] Figure 1 A structural diagram of a train control system provided in one embodiment of the present invention;

[0042] Figure 2 A flow chart of a train control center sending a low-frequency code sequence is provided in one embodiment of the present invention.

[0043] Figure 3 A flowchart of a method for processing a low-frequency code sequence by an on-vehicle device provided by one embodiment of the present invention;

[0044] Figure 4 A schematic diagram of a faulty occupancy of a block section within the axle counting unit;

[0045] Figure 5 A schematic diagram of the fault occupancy of two non-contiguous block sections within the axle counting unit;

[0046] Figure 6 Schematic diagram of fault occupancy of two consecutive block sections within the axle counting unit. DETAILED DESCRIPTION

[0047] The scheme proposed in the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation methods of the present invention. In order to make the purposes, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the efficacy and purpose that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention.

[0048] Figure 1The train control system provided by the present invention includes a train control center 101, a track circuit 102, and an onboard device 103. The train control center 101 is connected to the track circuit 102 via a track circuit interface and is also connected to the onboard device 103 via a wireless channel. The track circuit 102 is also connected to the onboard device 103 via a wireless channel. In the prior art, the train control center 101 can only send low-frequency code sequence information to the onboard device 103 via a single track circuit interface. If a fault occurs at the transmitting port of the train control center 101, the track circuit 102, or the receiving port of the onboard device 103, the train will take braking measures to temporarily stop, affecting the travel of the current and subsequent trains and the normal operation of the line. In the present invention, the train control center 101 can not only send low-frequency code sequences to the onboard device 103 via the track circuit interface, but can also send low-frequency code sequences directly to the onboard device 103 via wireless communication, thereby resolving the aforementioned problems of the prior art.

[0049] like Figure 2 As shown, an embodiment of the present invention provides a method for a train control center to send a low-frequency code sequence, which is applied to the train control center and includes the following steps S201 to S207.

[0050] Step S201: receiving the section occupancy status information sent by the track circuit and calculating the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence, wherein the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence are consistent.

[0051] It is understandable that when the train control center is powered on and started, it will establish a normal communication connection with external devices such as the track circuit, and receive the section occupancy status information sent by the track circuit in real time. The section occupancy status usually includes four states: idle, normal occupancy, fault occupancy and occupancy loss. Regardless of the section occupancy status, step S201 will calculate the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence according to the section occupancy status, so the two low-frequency code sequences are exactly the same.

[0052] Step S202, determine whether a fault occurs and occupies a blocked section; if so, execute step S203.

[0053] In this step, the train control center will perform logical operations through the section occupancy status information sent by the track circuit. If it is considered that a section should not be occupied, but the section occupancy status sent by the track circuit is occupied, the block section to which the section belongs is determined to be fault occupied, that is, a fault occupied block section occurs.

[0054] It is understandable that when a track circuit fails, the track circuit sends an abnormal section occupancy status to the train control center (that is, a section is not occupied, but the section occupancy status sent by the track circuit is occupied). In the prior art, for this situation, the train control center will determine that the track circuit block section is occupied due to a fault after performing a logical operation. The block sections behind the running direction of the block section calculate the low-frequency code sequence according to the safety side and send it to the on-board equipment through the track circuit interface. At this time, the on-board equipment can only travel normally to the entrance of the fault-occupied block section according to the track circuit low-frequency code sequence, and cannot travel across the fault-occupied block section. When the fault-occupied block section is unexpectedly occupied due to an abnormality in the track circuit, and in a scenario where no occupation actually occurs, the on-board equipment only stops at the entrance of the fault-occupied block section according to the track circuit low-frequency code sequence, affecting the operating efficiency.

[0055] Based on this, the present invention uses axle counter status information and visual information from the lead vehicle to determine whether a track circuit fault exists or whether a section is occupied. It then wirelessly transmits a low-frequency code sequence to the onboard equipment, ensuring that the onboard equipment can pass through the faulty, occupied block section at normal speed, thereby improving operational efficiency. The following describes this method using steps S203 to S206.

[0056] It should be noted that if it is determined that no fault has occurred and the block section is occupied, indicating that the section occupancy status sent by the track circuit is consistent with the reality, then the following steps S203 to S206 do not need to be executed, and step S207 can be executed to send the track circuit low-frequency code sequence to the on-board device through the track circuit and send the initial wireless low-frequency code to the on-board device through wireless communication. After receiving the redundant low-frequency code sequence information, the on-board device calculates the driving permission and speed curve.

[0057] Step S203: Obtain the axle counter occupancy status information from the axle counter interface and determine whether the axle counter is occupied. If the axle counter is idle, proceed to step S204.

[0058] It can be understood that the axle counter occupancy indicates that there is a train in the axle counter. At this time, the above step S207 is executed, the track circuit low-frequency code sequence is sent to the on-board device through the track circuit, and the initial wireless low-frequency code is sent to the on-board device through wireless communication, so that the on-board device can calculate the driving permission and speed curve.

[0059] However, when the axle counter is occupied, it is impossible to determine whether the faulty occupation is caused by the train in the axle counter or by a track circuit fault, so it is necessary to wait until the axle counter is idle to execute step S204 to further determine the cause of the faulty occupation.

[0060] Step S204: Send a visual driving command to the intermediate on-board equipment closest to the rear of the fault-occupied block section through wireless communication, so that the intermediate on-board equipment drives the fault-occupied block section at a low speed in a visual mode. After the intermediate on-board equipment passes the fault-occupied block section normally, it sends feedback information to the train control center that the fault-occupied block section is unexpectedly occupied.

[0061] Step S205: Determine whether the feedback information from the intermediate vehicle-mounted device is received. If received, proceed to step S206.

[0062] It can be understood that if the intermediate on-board equipment can pass through the fault-occupied block section normally, it can be ruled out that the fault is caused by the train in the axle counter, and it is determined that the fault is caused by a track circuit fault. Therefore, step S206 is executed.

[0063] If the train control center does not receive the feedback information from the intermediate on-board equipment, indicating that the intermediate on-board equipment cannot pass through the fault-occupied block section normally, it is determined that the fault occupancy is caused by the train in the axle counter, and the track circuit has not failed. The track circuit low-frequency code sequence and the initial wireless low-frequency code sequence calculated in step S201 are correct, so the above-mentioned step S207 is executed to send the track circuit low-frequency code sequence to the on-board equipment through the track circuit and the initial wireless low-frequency code is sent to the on-board equipment through wireless communication, so that the on-board equipment can calculate the driving permission and speed curve.

[0064] Step S206: The fault-occupied block partition is processed as idle and recalculated to obtain a target wireless low-frequency code sequence. The track circuit low-frequency code sequence is sent to the on-board equipment through the track circuit, and the target wireless low-frequency code sequence is sent to the on-board equipment through wireless communication. The target wireless low-frequency code sequence includes the position and length of the fault-occupied block partition.

[0065] At this time, the vehicle-mounted device may extend the driving permission and speed curve according to the target wireless low-frequency code sequence.

[0066] The present invention adds an axle counter. The train control center determines whether the faulty block section is unexpectedly occupied by the axle counter based on whether the axle counter is occupied and whether the leading vehicle can pass through the faulty block section normally in visual mode. When the axle counter is idle and the leading vehicle can pass through the faulty block section visually, the train control center performs low-frequency code sequence encoding based on the idle state of the faulty block section and sends the low-frequency code sequence information (including the position and length of the faulty block section) to the vehicle via wireless communication. The vehicle extends the driving permission and speed curve based on this wireless low-frequency code sequence information.

[0067] Accordingly, an embodiment of the present invention further provides a method for processing a low-frequency code sequence in an on-board device, which is applied to an on-board device, such as Figure 3 As shown, the process includes the following steps S301 to S302.

[0068] Step S301: receiving a track circuit low-frequency code sequence sent by a track circuit and a wireless low-frequency code sequence sent by a train control center.

[0069] As can be seen from the above, the train control center calculates two low-frequency code sequences (track circuit low-frequency code sequence and wireless low-frequency code sequence, where the wireless low-frequency code sequence includes the initial wireless low-frequency code sequence and the target wireless low-frequency code sequence) and sends them to the on-board equipment through two redundant channels.

[0070] Step S302: redundantly calculating the driving permission and speed curve according to the track circuit low-frequency code sequence and the wireless low-frequency code sequence.

[0071] Specifically, the on-board device will first determine whether the track circuit low-frequency code sequence and the wireless low-frequency code are both valid. It is understandable that when the track circuit fails, the track circuit will send an invalid low-frequency code sequence to the on-board device. When the on-board device does not receive the low-frequency code sequence or the low-frequency code sequence is an invalid code, the low-frequency code sequence is judged to be invalid. If either the track circuit low-frequency code sequence or the wireless low-frequency code is invalid, the on-board device will calculate the driving permission and speed curve according to the other. If both are valid, the track circuit low-frequency code sequence and the wireless low-frequency code will be further compared for consistency; if the two are consistent (indicating that the wireless low-frequency code sequence is the initial wireless low-frequency code sequence calculated above), the driving permission and speed curve will be calculated according to the track circuit low-frequency code sequence. If the comparison between the two is inconsistent, the wireless low-frequency code sequence is analyzed to see whether it contains the fault-occupied block partition information. If it does not contain it (it may be due to a mutation in the transmission process of the wireless low-frequency code sequence, resulting in inconsistency with the track circuit low-frequency code sequence), the driving permission and speed curve are calculated according to the track circuit low-frequency code sequence. If it contains it (indicating that the wireless low-frequency code sequence is the target wireless low-frequency code sequence recalculated above), the driving permission and speed curve are calculated according to the wireless low-frequency code sequence.

[0072] The following describes the analysis and processing methods of the present invention for specific fault scenarios with reference to specific embodiments.

[0073] 1. In the non-fault occupancy scenario: The wireless LF code sequence is consistent with the track circuit LF code sequence. The onboard equipment receives the track circuit LF code sequence through the track circuit and the wireless LF code sequence through wireless communication. If the two are consistent, it will operate according to the track circuit LF code sequence. If the two are inconsistent, the wireless LF code sequence is analyzed to see if it contains the fault occupancy block section information. If not, it will operate according to the track circuit LF code sequence. If it does, it will operate according to the wireless LF code sequence. If the onboard equipment receives only one of the track circuit LF code sequence and the wireless LF code sequence, it will operate according to the received information.

[0074] 2. If Figure 4 As shown in the figure, a block section (175G) in the axle counting unit is occupied by a fault (the processing logic for the fault occupation of any block section in the axle counting unit is the same, regardless of the fault occupation of the first block section / the last block section / the middle block section): When the axle counting unit B is idle, the fault occupation of the 175G block section is handled as idle, and the track circuit low-frequency code sequence and the wireless low-frequency code sequence are as follows Figure 4 As shown. The 175G fault occupies the block section according to the idle processing logic. This continues until the train crosses the pressure and occupies the 177G block section. At this point, the 175G block section calculates the radio low-frequency code sequence according to the fault occupancy logic. At this point, the radio low-frequency code sequence is consistent with the track circuit low-frequency code sequence. When the train completely leaves axle counting unit B and axle counting unit B is idle, 175G is again processed as idle.

[0075] 3. Figure 5 As shown in the figure, two non-continuous block sections (175G and 179G) in the axle counting unit are occupied by faults: when the axle counting unit B is idle, the fault occupation of the 175G and 179G block sections is handled as idle, and the track circuit low-frequency code sequence and the wireless low-frequency code sequence are the same as Figure 5 When the train crosses and occupies the 177G block section, the block sections behind the trains such as 175G, 173G, and 171G follow the 175G fault occupation tracking and code sending (at this time, the wireless low-frequency code sequence of the block section behind is consistent with the track circuit low-frequency code sequence), and the block section in front of the train follows the 179G idle tracking and code sending, as shown. Figure 5 Medium wireless low frequency code sequence 2. When a train cross-pressure occupies the 181G block section, the block sections behind the trains such as 179G, 177G, 175G, 173G, and 171G will track and send codes according to the fault occupation of 179G and 175G (the wireless low frequency code sequence is consistent with the track circuit low frequency code sequence at this time). Figure 5 Medium wireless low frequency code sequence 3. When the train completely leaves axle counting unit B and axle counting unit B is idle, 175G and 179G are treated as idle again.

[0076] 4. Figure 6As shown in the figure, two consecutive block sections (177G and 179G) in the axle counting unit are occupied by faults: when the axle counting unit B is idle, the fault occupation of the block sections 175G and 177G is handled as idle, and the track circuit low-frequency code sequence and the wireless low-frequency code sequence are the same as Figure 6 When the train crosses and occupies the 177G block section, the block sections behind the trains such as 175G, 173G, and 171G follow the 175G fault occupation tracking and code sending (at this time, the wireless low-frequency code sequence of the block section behind is consistent with the track circuit low-frequency code sequence), and the block section in front of the train follows the 177G idle tracking and code sending, as shown. Figure 6 Medium wireless low frequency code sequence 2. When a train cross-pressure occupies the 179G block section, the block sections behind the trains such as 177G, 175G, 173G, and 171G will track and send codes according to the fault occupation of 177G and 175G (the wireless low frequency code sequence is consistent with the track circuit low frequency code sequence at this time). Figure 6 Medium wireless low frequency code sequence 3. When the train completely leaves axle counting unit B and axle counting unit B is idle, 175G and 177G are treated as idle again.

[0077] Based on the same inventive concept, an embodiment of the present invention further provides a train control system, such as Figure 1 As shown, it includes: a train control center 101, a track circuit 102 and an onboard device 103. It should be noted that the train control system may also include other devices, which is not limited in the present invention.

[0078] The track circuit 102 is used to send section occupancy status information to the train control center 101;

[0079] The train control center 101 is used to: receive the section occupancy status information sent by the track circuit 102 and calculate the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence, wherein the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence are consistent; determine whether a fault occupies the block section, and if so, obtain the axle counter occupancy status information from the axle counter interface and determine whether the axle counter is occupied; if the axle counter is idle, send a visual driving command to the intermediate on-board equipment closest to the rear of the fault-occupied block section via wireless communication, so that the intermediate on-board equipment drives the fault-occupied block section at a low speed in a visual mode. When After the intermediate on-board equipment passes through the fault-occupied block section normally, it sends feedback information to the train control center indicating that the fault-occupied block section is unexpectedly occupied; it is determined whether the feedback information from the intermediate on-board equipment is received. If so, the fault-occupied block section is treated as idle and a target wireless low-frequency code sequence is recalculated to obtain the target wireless low-frequency code sequence; the track circuit low-frequency code sequence is sent to the on-board equipment 103 via the track circuit 102, and the target wireless low-frequency code sequence is sent to the on-board equipment 103 via wireless communication, wherein the target wireless low-frequency code sequence includes the position and length of the fault-occupied block section;

[0080] The onboard device 103 is used to: receive the track circuit low-frequency code sequence sent by the track circuit 102 and the wireless low-frequency code sequence sent by the train control center 101; and perform redundant calculation of the driving permission and speed curve based on the track circuit low-frequency code sequence and the wireless low-frequency code sequence.

[0081] Optionally, the train control center 101 is further configured to: if no fault occurs to occupy the block section, send the track circuit low-frequency code sequence to the on-board device 103 through the track circuit 102 and send the initial wireless low-frequency code to the on-board device 103 through wireless communication.

[0082] Optionally, the train control center 101 is further configured to: if the axle counter is occupied, send the track circuit low-frequency code sequence to the on-board device 103 via the track circuit 102 and send the initial wireless low-frequency code to the on-board device 103 via wireless communication.

[0083] Optionally, the train control center 101 is further configured to: if the feedback information from the intermediate on-board device is not received, send the track circuit low-frequency code sequence to the on-board device 103 through the track circuit 102 and send the initial wireless low-frequency code to the on-board device 103 through wireless communication.

[0084] Optionally, the on-board device 103 is specifically used to: determine whether the track circuit low-frequency code sequence and the wireless low-frequency code are both valid; if one is invalid, calculate the driving permission and speed curve according to the other; if both are valid, compare the track circuit low-frequency code sequence and the wireless low-frequency code for consistency; if the two are consistent, calculate the driving permission and speed curve according to the track circuit low-frequency code sequence.

[0085] Optionally, the on-board device is specifically used to: if the comparison between the two is inconsistent, analyze whether the wireless low-frequency code sequence contains fault-occupied block partition information; if not, calculate the driving permission and speed curve according to the track circuit low-frequency code sequence; if contained, calculate the driving permission and speed curve according to the wireless low-frequency code sequence.

[0086] For the specific content of the train control system, please refer to the above-mentioned method of the train control center sending the low-frequency code sequence and the vehicle-mounted equipment processing the low-frequency code sequence, which will not be described in detail here.

[0087] In summary, the present invention provides a method for a train control center to transmit low-frequency code sequence information to onboard equipment via wireless communication. This method addresses the problem of the train control center being able to transmit low-frequency code sequence information to onboard equipment only through a single track circuit interface. In the event of a single-channel link failure on the track circuit interface, the train control center can use redundant channels to continuously provide driving permission information to the onboard equipment, improving train operation efficiency and line capacity.

[0088] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0089] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A method for a train control center to send a low-frequency code sequence, characterized in that: Applied to train control centers, including: receiving the section occupancy status information sent by the track circuit and calculating the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence, wherein the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence are consistent; Determine whether a fault occurs and the block section is occupied. If so, obtain the axle counter occupancy status information from the axle counter interface and determine whether the axle counter is occupied; If the axle counter is idle, a visual driving command is sent to the intermediate on-board equipment closest to the rear of the fault-occupied block section via wireless communication, so that the intermediate on-board equipment drives the fault-occupied block section at a low speed in a visual mode. After the intermediate on-board equipment passes the fault-occupied block section normally, feedback information is sent to the train control center indicating that the fault-occupied block section is unexpectedly occupied. Determine whether the feedback information of the intermediate on-board device is received. If so, treat the fault-occupied block partition as idle and recalculate the target wireless low-frequency code sequence, send the track circuit low-frequency code sequence to the on-board device through the track circuit, and send the target wireless low-frequency code sequence to the on-board device through wireless communication, where the target wireless low-frequency code sequence includes the position and length of the fault-occupied block partition.

2. The method for transmitting a low-frequency code sequence by a train control center according to claim 1, wherein: If there is no fault occupying the block section, the track circuit low frequency code sequence is sent to the onboard equipment through the track circuit and the initial wireless low frequency code is sent to the onboard equipment through wireless communication.

3. The method for transmitting a low-frequency code sequence by a train control center according to claim 1, wherein: If the axle counter is occupied, the track circuit low-frequency code sequence is sent to the on-board device via the track circuit, and the initial wireless low-frequency code is sent to the on-board device via wireless communication.

4. The method for transmitting a low-frequency code sequence by a train control center according to claim 1, wherein: If the feedback information from the intermediate on-board device is not received, the track circuit low-frequency code sequence is sent to the on-board device via the track circuit and the initial wireless low-frequency code is sent to the on-board device via wireless communication.

5. A method for processing low-frequency code sequences by an on-vehicle device, characterized in that: Applied to vehicle-mounted equipment, including: Receive the track circuit low-frequency code sequence sent by the track circuit and the wireless low-frequency code sequence sent by the train control center; Redundant calculation of driving permission and speed curve is performed based on the track circuit low-frequency code sequence and the wireless low-frequency code sequence.

6. The method for processing a low-frequency code sequence by an on-vehicle device according to claim 5, wherein: The redundant calculation of the driving permission and the speed curve according to the track circuit low-frequency code sequence and the wireless low-frequency code sequence includes: Determining whether the track circuit low-frequency code sequence and the wireless low-frequency code are both valid; If one is invalid, the driving permit and speed curve will be calculated according to the other one; If both are valid, the track circuit low-frequency code sequence and the wireless low-frequency code are compared for consistency; If the two are consistent, the driving permission and speed curve are calculated according to the track circuit low-frequency code sequence.

7. The method for processing a low-frequency code sequence by an on-vehicle device according to claim 6, wherein: Also includes: If the comparison between the two is inconsistent, the wireless low-frequency code sequence is analyzed to see whether it contains the fault-occupied block partition information. If not, the driving permission and speed curve are calculated according to the track circuit low-frequency code sequence. If it is contained, the driving permission and speed curve are calculated according to the wireless low-frequency code sequence.

8. A train control system, characterized in that: It includes train control center, track circuit and onboard equipment, among which: The track circuit is used to: send section occupancy status information to the train control center; The train control center is configured to: receive the section occupancy status information sent by the track circuit and calculate the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence, wherein the track circuit low-frequency code sequence and the initial wireless low-frequency code sequence are consistent; determine whether a fault occupies the block section, and if so, obtain the axle counter occupancy status information from the axle counter interface and determine whether the axle counter is occupied; if the axle counter is idle, send a visual driving command to the intermediate on-board equipment closest to the rear of the fault-occupied block section via wireless communication, so that the intermediate on-board equipment drives the fault-occupied block section at a low speed in a visual mode. After the intermediate on-board equipment passes through the fault-occupied block section normally, it sends feedback information to the train control center indicating that the fault-occupied block section is unexpectedly occupied; determining whether the feedback information from the intermediate on-board equipment is received, and if so, treating the fault-occupied block section as idle and recalculating a target wireless low-frequency code sequence; sending the track circuit low-frequency code sequence to the on-board equipment via the track circuit, and sending the target wireless low-frequency code sequence to the on-board equipment via wireless communication, wherein the target wireless low-frequency code sequence includes the position and length of the fault-occupied block section; The on-board device is used to: receive the track circuit low-frequency code sequence sent by the track circuit and the wireless low-frequency code sequence sent by the train control center; and perform redundant calculation of the driving permission and speed curve based on the track circuit low-frequency code sequence and the wireless low-frequency code sequence.

9. The train control system according to claim 8, characterized in that: The train control center is further configured to: if no fault occurs to occupy the block section, send the track circuit low-frequency code sequence to the on-board equipment via the track circuit and send the initial wireless low-frequency code to the on-board equipment via wireless communication.

10. The train control system according to claim 8, characterized in that: The train control center is further configured to: if the axle counter is occupied, send the track circuit low-frequency code sequence to the on-board device via the track circuit and send the initial wireless low-frequency code to the on-board device via wireless communication.

11. The train control system according to claim 8, characterized in that: The train control center is further configured to: if the feedback information from the intermediate on-board device is not received, send the track circuit low-frequency code sequence to the on-board device via the track circuit and send the initial wireless low-frequency code to the on-board device via wireless communication.

12. The train control system according to claim 8, characterized in that: The on-board device is specifically used to: determine whether the track circuit low-frequency code sequence and the wireless low-frequency code are both valid; if one is invalid, calculate the driving permission and speed curve according to the other; if both are valid, compare the track circuit low-frequency code sequence and the wireless low-frequency code for consistency; if the two are consistent, calculate the driving permission and speed curve according to the track circuit low-frequency code sequence.

13. The train control system according to claim 12, characterized in that: The on-board device is specifically used to: if the comparison between the two is inconsistent, analyze whether the wireless low-frequency code sequence contains the fault-occupied block partition information; if not, calculate the driving permission and speed curve according to the track circuit low-frequency code sequence; if contained, calculate the driving permission and speed curve according to the wireless low-frequency code sequence.

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