Method and system for distributing direction for single transponder group based on satellite positioning

Abstract

The invention discloses a method and system for distributing directions for a single transponder group based on satellite positioning, and the method comprises the steps: judging whether the satellite positioning is effective or not when a train arrives at a single transponder group, and calculating the current running direction of the train through the satellite positioning if the satellite positioning is effective; according to the current running direction of the train and a first binding relation, the direction of the single transponder group is distributed, and the first binding relation is stored in an electronic map of train control on-board equipment and used for representing the relation between the direction of the single transponder group and the running direction of the train. The arrangement number of the ground transponders can be reduced, and the system cost is saved; directions can be distributed for the single transponder group when link information is not used; the system adaptability with the existing train control system is high; the situation that satellite positioning is invalid is considered, and the stability and applicability of the system are improved.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation technology, and in particular to a method and system for allocating directions to a transponder group consisting of a single transponder based on satellite positioning. Background Art

[0002] The ground transponder is an important component of the current CTCS (China Train Control System). When a train passes over the transponder, the transponder sends the stored information to the train's onboard equipment through the electromagnetic coupling between the onboard antenna and the transponder. The transponder can provide the train with fixed line parameters such as the slope and curve radius of the line. It can also transmit the temporary speed limit and fixed speed limit information of the line, and inform the train of the opening of the route ahead. Under the CTCS system, the ground transponder can assist the train in positioning, serve as a known precise position reference point for vehicle-ground communication, and play a role in vehicle-ground coordination.

[0003] In the CTCS system, the number of transponders in a transponder group generally does not exceed three. A transponder group used only for positioning can be a single transponder. When the train control onboard equipment antenna passes through the transponder group, the direction of passage through the transponder group can be determined based on the transponder triggering sequence. That is, the direction of passage through the transponder group is determined by the increasing group number, and the direction of passage through the transponder group is determined by the decreasing group number. For example, if three transponders are received, these three transponders form a group, and the three transponders received successively are numbered 1, 2, and 3, then the transponder group is considered to have been received in the forward direction. For transponder groups consisting of a single transponder, the direction cannot be determined by the group number when a train passes through. Therefore, other methods are required to assign a direction to transponder groups consisting of a single transponder (i.e., a single transponder group). The train can verify the direction of passage through the transponder group based on the direction of passage through the transponder group. If the verification direction of a certain information in the transponder message or wireless message is valid in the forward direction, then this information is only used when the train passes through the transponder group in the forward direction. A single balise is expensive to manufacture and is widely laid on track. The required number is large, and the installation and maintenance costs are high. Therefore, it is essential to reduce the number of balises on track. When a balise group consisting of a single balise is triggered, the direction of the train relative to the balise group is unknown. Generally, a coordinate system is assigned to a single balise group using link information or an RBC (Radio Block Center). However, when there is no link information or the RBC does not assign a coordinate system, the direction of the train passing through the single balise group is unknown. Therefore, it is impossible to verify the direction of the information in the balise message or wireless message based on that direction. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and system for assigning a direction to a single transponder group based on satellite positioning. This is to solve the problem in the prior art that when a transponder group consisting of a single transponder is triggered, the direction of the train relative to the transponder group is unknown, there is no link information, or the RBC has not assigned a coordinate system, making it impossible to determine the direction of the train passing through the single transponder group.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In one aspect, the present invention provides a method for assigning directions to a single transponder group based on satellite positioning, which is applied to a train control vehicle-mounted device, and the method includes:

[0007] When the train reaches a single transponder group, it determines whether the satellite positioning is valid. If the satellite positioning is valid, the current running direction of the train is calculated using the satellite positioning;

[0008] The direction of the single transponder group is assigned according to the current running direction of the train and the first binding relationship, wherein the first binding relationship is stored in the electronic map of the train control on-board equipment, which is used to represent the relationship between the direction of the single transponder group and the running direction of the train.

[0009] Preferably, the current running direction of the train includes: the train is currently in an upward direction or the train is currently in a downward direction.

[0010] Preferably, it also includes: if satellite positioning is invalid, determining the current running direction of the train based on the current rotation direction of the train wheels and a second binding relationship, wherein the second binding relationship is the relationship between the rotation direction of the train wheels and the running direction of the train.

[0011] Preferably, the rotation direction of the train wheel is determined by a feedback signal of a wheel speed sensor, and the rotation direction of the train wheel includes: the wheel is rotating forward or the wheel is rotating backward.

[0012] Preferably, the determining of the current running direction of the train according to the current rotation direction of the train wheels and the second binding relationship specifically includes:

[0013] When the current rotation direction of the train wheels is forward, if the second binding relationship is downward binding forward, the current running direction of the train is determined to be downward; if the second binding relationship is downward binding reverse, the current running direction of the train is determined to be upward;

[0014] When the current rotation direction of the train wheels is reverse, if the second binding relationship is downward binding forward rotation, it is determined that the current running direction of the train is upward; if the second binding relationship is downward binding reverse, it is determined that the current running direction of the train is downward.

[0015] Preferably, it also includes:

[0016] Determine whether the link information in the train control onboard equipment meets the preset validity conditions;

[0017] If the link information satisfies the preset validity condition, the direction of the single transponder group is allocated according to the link information.

[0018] Preferably, when the train arrives at a single transponder group, it is determined whether the satellite positioning is valid. If the satellite positioning is valid, the satellite positioning is used to calculate the current direction of the train; according to the current direction of the train and the first binding relationship, the direction of the single transponder group is assigned, which is executed when the link information does not meet the preset validity condition.

[0019] Preferably, the preset validity conditions include: when the transponder receiving antenna of the train control on-board equipment passes through the single transponder group, if the single transponder group is predicted in the link information of the train control on-board equipment, and the receiving position of the single transponder group is within the expected window predicted in the link information, then the link information is valid; in other cases, the link information is invalid.

[0020] Preferably, the allocating the single transponder group direction according to the link information specifically includes:

[0021] If the direction of the single transponder group announced in the link information is forward, assigning the single transponder group to the forward direction;

[0022] If the link information predicts that the direction of the single transponder group is the reverse direction, the single transponder group is assigned to the reverse direction.

[0023] Preferably, the allocating the direction of the single transponder group according to the current running direction of the train and the first binding relationship specifically includes:

[0024] When the current running direction of the train is upward, if the first binding relationship is that the downlink binding single balise group is in the forward direction, the single balise group is assigned to the reverse direction; if the first binding relationship is that the downlink binding single balise group is in the reverse direction, the single balise group is assigned to the forward direction;

[0025] When the current running direction of the train is downward, if the first binding relationship is the forward direction of the downward binding single transponder group, the single transponder group is assigned to the forward direction; if the first binding relationship is the reverse direction of the downward binding single transponder group, the single transponder group is assigned to the reverse direction.

[0026] On the other hand, the present invention also provides a system for assigning directions to a single transponder group based on satellite positioning, which is used to implement the above-mentioned method for assigning directions to a single transponder group based on satellite positioning, and the system includes:

[0027] The train's current running direction acquisition module is used to determine whether the satellite positioning is valid when the train arrives at a single transponder group. If valid, the satellite positioning is used to calculate the train's current running direction;

[0028] A single transponder group direction allocation module is connected to the train's current running direction acquisition module, and allocates the direction of the single transponder group according to the train's current running direction and a first binding relationship, wherein the first binding relationship is stored in the electronic map of the train control on-board equipment, and is used to represent the relationship between the single transponder group direction and the train's running direction.

[0029] An electronic device includes a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the method of allocating directions to a single transponder group based on satellite positioning is implemented.

[0030] A readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned method of assigning directions to a single transponder group based on satellite positioning.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention provides a method and system for assigning directions to a single transponder group based on satellite positioning, which can reduce the number of ground transponders deployed and save system costs;

[0033] 2. The method of the present invention can assign a direction to a single transponder group when link information is not used or when the RBC has not assigned a coordinate system, thereby performing direction verification of transponder messages and wireless message information based on the direction assigned to the single transponder group, thereby improving the applicability of the system;

[0034] 3. The present invention can also use link information to assign directions to single transponder groups, which is highly adaptable to existing CTCS systems;

[0035] 4. The present invention takes into account the situation where satellite positioning is invalid and uses the direction of the speed sensor for binding calculation to improve the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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:

[0037] Figure 1 A schematic flow chart of a method for allocating directions to a single transponder group based on satellite positioning according to an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of determining a second binding relationship provided by an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of determining the current running direction of the train in step S4 according to one embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of a flow chart of allocating directions of the single transponder group in step S5 according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following is combined with Figures 1 to 4 The method and system for assigning directions to a single transponder group based on satellite positioning, as proposed by the present invention, are further described in detail in the following detailed description. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in a very simplified form and are not to exact scale, and are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention. Please refer to the accompanying drawings to make the purposes, features, and advantages of the present invention more readily apparent.

[0042] In view of the problem in the prior art that when a balise group consisting of a single balise is triggered, the direction of the train relative to the balise group is unknown, there is no link information or the RBC has not assigned a coordinate system, and the direction of the train passing through the single balise group cannot be obtained.

[0043] On the one hand, reference Figure 1 As shown, this embodiment provides a method for assigning directions to a single transponder group based on satellite positioning, including the following steps:

[0044] Step S1: Determine whether the link information in the train control onboard equipment meets the preset validity conditions.

[0045] The preset validity condition includes: when the transponder receiving antenna of the train control on-board device passes through the single transponder group, if the single transponder group is announced in the link information of the train control on-board device, and the receiving position of the single transponder group (when receiving the transponder, the on-board device will estimate the position of a transponder based on the current position, speed and other information, which can be simply understood as, when the on-board device receives the transponder, the current position calculated by the on-board device is used as the position of the transponder, that is, the "receiving position of the single transponder group") is within the expected window announced in the link information, then the link information Valid; in other cases, the link information is invalid. The link information represents a kind of forecast, that is, a forecast of the transponder group to be received in front of the train, and the forecast content includes the number, location (how far away the train can receive the transponder group), direction, etc. The expected window of the link information forecast refers to whether the actual transponder group received is consistent with the forecast after considering the train ranging error. For example: if a transponder group is received 100 meters ahead and a 2% ranging error is taken into account, as long as the transponder group is received between 98 and 102 meters in the expected window, the transponder group is acceptable.

[0046] If the link information satisfies the preset validity conditions, the direction of the single transponder group is assigned based on the link information. Specifically, if the link information indicates the direction of the single transponder group as forward, the single transponder group is assigned as forward; if the link information indicates the direction of the single transponder group as reverse, the single transponder group is assigned as reverse. Once the direction assignment of the single transponder group is complete, the steps are terminated. If the link information indicates the direction of the single transponder group, the vehicle cannot determine the direction when passing through the single transponder group. Therefore, the direction indicated in the link information is used. If the vehicle receives the link information and the link information satisfies the preset validity conditions, the link information is used as the priority for determining the direction of the single transponder.

[0047] If the link information does not meet the preset validity condition, step S2 is executed.

[0048] Step S2: When the train arrives at a single transponder group, it is determined whether the satellite positioning is valid. If the satellite positioning is valid, step S3 is executed. If the satellite positioning is invalid, step S4 is executed.

[0049] Step S3: If the satellite positioning is valid, the current running direction of the train is calculated using the satellite positioning, and step S5 is executed. The running direction of the train includes an upward direction or a downward direction, and the running direction of the train is referred to as a first direction.

[0050] Step S4: If satellite positioning is invalid, the current train direction is determined based on the current rotational direction of the train wheels and the second binding relationship, and step S5 is executed. The second binding relationship is the relationship between the rotational direction of the train wheels and the train's direction of travel. The rotational direction of the train wheels is determined by feedback signals from wheel speed sensors, and the rotational direction of the train wheels includes forward rotation and reverse rotation. This rotational direction of the train wheels is referred to as the second direction.

[0051] The second binding relationship is determined in advance according to the train running direction and the rotation direction of the train wheels, and is stored in the train control on-board device (the second binding relationship is stored in the on-board device memory and becomes invalid when the power is off. The second binding relationship will be recalculated and determined the next time the device is turned on). The method for determining the second binding relationship is as follows: Determine the second binding relationship, refer to Figure 2 As shown, it specifically includes: when the running direction of the train is downward and the rotation direction of the train wheels is forward, determining that the second binding relationship is downward binding forward; when the running direction of the train is downward and the rotation direction of the train wheels is reverse, determining that the second binding relationship is downward binding reverse; when the running direction of the train is upward and the rotation direction of the train wheels is forward, determining that the second binding relationship is downward binding reverse; when the running direction of the train is upward and the rotation direction of the train wheels is reverse, determining that the second binding relationship is downward binding forward.

[0052] refer to Figure 3 As shown, the method of determining the current running direction of the train according to the current rotation direction of the train wheels and the second binding relationship specifically includes:

[0053] When the current rotation direction of the train wheels is forward, if the second binding relationship is downward binding forward, the current running direction of the train is determined to be downward; if the second binding relationship is downward binding reverse, the current running direction of the train is determined to be upward.

[0054] When the current rotation direction of the train wheels is reverse, if the second binding relationship is downward binding forward rotation, it is determined that the current running direction of the train is upward; if the second binding relationship is downward binding reverse, it is determined that the current running direction of the train is downward.

[0055] After determining the current running direction of the train, execute step S5.

[0056] Step S5: assigning the direction of the single transponder group according to the current running direction of the train and the first binding relationship, wherein the first binding relationship is stored in the electronic map of the train control onboard equipment and is used to represent the relationship between the direction of the single transponder group and the running direction of the train.

[0057] The first binding relationship is determined in advance based on the train running direction and the direction of the single transponder group and stored in the electronic map. The first binding relationship includes the following two situations: downlink binding single transponder group forward; downlink binding single transponder group reverse.

[0058] The direction of allocating the single transponder group according to the current running direction of the train and the first binding relationship is referenced. Figure 4 As shown, it specifically includes:

[0059] When the current running direction of the train is upward, if the first binding relationship is the forward direction of the downlink binding single transponder group, the single transponder group is assigned to the reverse direction; when the current running direction of the train is upward, if the first binding relationship is the reverse direction of the downlink binding single transponder group, the single transponder group is assigned to the forward direction.

[0060] When the current running direction of the train is down, if the first binding relationship is that the downlink binding single transponder group is forward, the single transponder group is assigned to the forward direction; if the first binding relationship is that the downlink binding single transponder group is reverse, the single transponder group is assigned to the reverse direction.

[0061] On the other hand, this embodiment also provides a system for allocating directions to single transponder groups based on satellite positioning, which is used to implement the above-mentioned method for allocating directions to single transponder groups based on satellite positioning, and the system includes: a train current running direction acquisition module and a single transponder group direction allocation module. The train current running direction acquisition module is used to determine whether satellite positioning is valid when the train arrives at a single transponder group, and if valid, use satellite positioning to calculate the current running direction of the train. The single transponder group direction allocation module is connected to the train current running direction acquisition module, and allocates the direction of the single transponder group according to the current running direction of the train and a first binding relationship, wherein the first binding relationship is stored in the electronic map of the train control on-board equipment, and is used to represent the relationship between the single transponder group direction and the running direction of the train.

[0062] An electronic device includes a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the method of allocating directions to a single transponder group based on satellite positioning is implemented.

[0063] A readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned method of assigning directions to a single transponder group based on satellite positioning.

[0064] In summary, this embodiment proposes a method and system for assigning directions to single transponder groups based on satellite positioning, which can reduce the number of ground transponders deployed and save system costs; it can assign directions to single transponder groups when link information is not used or RBC does not assign a coordinate system, thereby performing direction verification of transponder messages and wireless message information based on the direction assigned to the single transponder group, thereby improving the applicability of the system; in this embodiment, link information can also be used to assign directions to single transponder groups, which has strong adaptability to existing CTCS systems; this embodiment takes into account the situation where satellite positioning is invalid, and uses the direction of the speed sensor for binding calculation to improve the stability of the system.

[0065] 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.

[0066] It should be noted that the devices and methods disclosed in the embodiments of this document may also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of the devices, methods, and computer program products according to the various embodiments of this document. In this regard, each box in the flowchart or block diagram may represent a module, program, or portion of code, wherein the module, program segment, or portion of code contains one or more executable instructions for implementing a specified logical function, and the module, program segment, or portion of code contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the boxes may also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes may actually be executed substantially in parallel, or they may sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system for performing the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

[0067] In addition, the functional modules in the various embodiments of this document may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0068] 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 assigning directions to a single transponder group based on satellite positioning, characterized in that: Applied to train control onboard equipment, the method includes: When the train reaches a single transponder group, it determines whether the satellite positioning is valid. If the satellite positioning is valid, the current running direction of the train is calculated using the satellite positioning; The direction of the single transponder group is assigned according to the current running direction of the train and the first binding relationship, wherein the first binding relationship is stored in the electronic map of the train control on-board equipment, which is used to represent the relationship between the direction of the single transponder group and the running direction of the train.

2. The method for assigning directions to a single transponder group based on satellite positioning according to claim 1, wherein: The running direction of the train includes: an upward direction or a downward direction.

3. The method for assigning directions to a single transponder group based on satellite positioning according to claim 2, characterized in that: Also includes: If the satellite positioning is invalid, the current running direction of the train is determined based on the current rotation direction of the train wheels and the second binding relationship, wherein the second binding relationship is the relationship between the rotation direction of the train wheels and the running direction of the train.

4. The method for assigning directions to a single transponder group based on satellite positioning according to claim 3, wherein: The rotation direction of the train wheel is determined by a feedback signal of a wheel speed sensor, and the rotation direction of the train wheel includes: the wheel is rotating forward or the wheel is rotating backward.

5. The method for assigning directions to a single transponder group based on satellite positioning according to claim 4, characterized in that: The method of determining the current running direction of the train based on the current rotation direction of the train wheels and the second binding relationship specifically includes: When the current rotation direction of the train wheels is forward, if the second binding relationship is downward binding forward, the current running direction of the train is determined to be downward; if the second binding relationship is downward binding reverse, the current running direction of the train is determined to be upward; When the current rotation direction of the train wheels is reverse, if the second binding relationship is downward binding forward rotation, it is determined that the current running direction of the train is upward; if the second binding relationship is downward binding reverse, it is determined that the current running direction of the train is downward.

6. The method for assigning directions to a single transponder group based on satellite positioning according to claim 1, wherein: Also includes: Determine whether the link information in the train control onboard equipment meets the preset validity conditions; If the link information satisfies the preset validity condition, the direction of the single transponder group is allocated according to the link information.

7. The method for assigning directions to a single transponder group based on satellite positioning according to claim 6, characterized in that: When the train arrives at a single transponder group, it is determined whether the satellite positioning is valid. If the satellite positioning is valid, the satellite positioning is used to calculate the current direction of the train; according to the current direction of the train and the first binding relationship, the direction of the single transponder group is assigned, which is executed when the link information does not meet the preset validity condition.

8. The method for assigning directions to a single transponder group based on satellite positioning according to claim 6, wherein: The preset validity conditions include: when the transponder receiving antenna of the train control on-board equipment passes through the single transponder group, if the single transponder group is predicted in the link information of the train control on-board equipment, and the receiving position of the single transponder group is within the expected window predicted in the link information, then the link information is valid; in other cases, the link information is invalid.

9. The method for assigning directions to a single transponder group based on satellite positioning according to claim 6, wherein: The allocating the single transponder group direction according to the link information specifically includes: If the direction of the single transponder group announced in the link information is forward, assigning the single transponder group to the forward direction; If the link information predicts that the direction of the single transponder group is the reverse direction, the single transponder group is assigned to the reverse direction.

10. The method for assigning directions to a single transponder group based on satellite positioning according to claim 2, wherein: The allocation of the direction of the single transponder group according to the current running direction of the train and the first binding relationship specifically includes: When the current running direction of the train is upward, if the first binding relationship is that the downlink binding single balise group is in the forward direction, the single balise group is assigned to the reverse direction; if the first binding relationship is that the downlink binding single balise group is in the reverse direction, the single balise group is assigned to the forward direction; When the current running direction of the train is downward, if the first binding relationship is the forward direction of the downward binding single transponder group, the single transponder group is assigned to the forward direction; if the first binding relationship is the reverse direction of the downward binding single transponder group, the single transponder group is assigned to the reverse direction.

11. A system for assigning directions to groups of single transponders based on satellite positioning, characterized in that: The system is used to implement the method for assigning directions to a single transponder group based on satellite positioning as described in any one of claims 1 to 10, and the system comprises: The train's current running direction acquisition module is used to determine whether the satellite positioning is valid when the train arrives at a single transponder group. If valid, the satellite positioning is used to calculate the train's current running direction; A single transponder group direction allocation module is connected to the train's current running direction acquisition module, and allocates the direction of the single transponder group according to the train's current running direction and a first binding relationship, wherein the first binding relationship is stored in the electronic map of the train control on-board equipment, and is used to represent the relationship between the single transponder group direction and the train's running direction.

12. An electronic device, characterized in that: The method 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 method for allocating directions to a single transponder group based on satellite positioning according to any one of claims 1 to 10 is implemented.

13. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for allocating directions to a single transponder group based on satellite positioning according to any one of claims 1 to 10 is implemented.

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