A cross-region train position tracking method, device, equipment and storage medium

Abstract

The application provides a cross-region train position tracking method, device and equipment and a storage medium. The method comprises the following steps: obtaining a train vibration signal based on a grating array sensing optical cable, wherein the train vibration signal comprises a plurality of train vibration sub-signals corresponding to a plurality of demodulators; demodulating the plurality of train vibration sub-signals based on the plurality of demodulators to determine a plurality of train vibration characteristics; determining a plurality of real-time local positions of the train based on the plurality of train vibration characteristics; determining an overlapping train vibration characteristic corresponding to an overlapping measurement area in the plurality of train vibration characteristics, and determining whether the plurality of real-time local positions are combined based on the overlapping train vibration characteristic to track the train across regions. The application accurately combines the plurality of real-time local positions based on the overlapping train vibration characteristic of the overlapping measurement area, thereby improving the accuracy and precision of train position tracking.

Description

Technical Field

[0001] This invention relates to the field of rail transit signal processing technology, specifically to a method, device, equipment, and storage medium for cross-regional train location tracking. Background Technology

[0002] Currently, the commonly used train positioning technology in urban rail transit involves measuring the train's speed using speed sensors and using ground transponders for position correction to achieve train position detection. This position detection process is complex. To address this technical challenge, existing technologies propose applying grating array sensing technology to train positioning. Specifically, grating array sensing optical cables are used to acquire vibration information generated by the train traveling on the track. This vibration information is then demodulated using a demodulator to achieve train positioning and tracking on the line.

[0003] Because trains travel long distances and demodulators have limited coverage, multiple demodulators are often needed on a single line. When a train crosses different demodulators, current technology cannot accurately track the train's position.

[0004] There is an urgent need to provide a method, device, equipment, and storage medium for cross-regional train location tracking to solve the above-mentioned technical problems. Summary of the Invention

[0005] In view of this, it is necessary to provide a method, apparatus, device and storage medium for cross-regional train location tracking, so as to solve the technical problem in the prior art that the train location cannot be accurately tracked when the train crosses different demodulators.

[0006] On one hand, the present invention provides a cross-regional train location tracking method applied to an autonomous sensing system, the autonomous sensing system including a grating array sensing optical cable and multiple demodulators, with overlapping measurement areas between adjacent demodulators; the cross-regional train location tracking method includes: Train vibration signals are acquired based on the grating array sensing optical cable, and the train vibration signals include multiple train vibration sub-signals corresponding to the multiple demodulators; Based on the demodulators, the multiple train vibration sub-signals are demodulated to determine multiple train vibration characteristics; Multiple real-time local positions of the train are determined based on the aforementioned multiple train vibration characteristics; Identify the overlapping train vibration features among the multiple train vibration features that correspond to the overlapping measurement area, and determine whether to merge the multiple real-time local positions based on the overlapping train vibration features, so as to perform cross-regional tracking of the train.

[0007] In some possible implementations, each demodulator includes multiple channels, with a multiplexed measurement area between adjacent channels, and each train vibration feature includes multiple train channel vibration features corresponding to the multiple channels; determining multiple real-time local positions of the train based on the multiple train vibration features includes: The real-time positions of multiple train passages are determined based on the vibration characteristics of these multiple train passages. Determine the vibration characteristics of the multiple train passages that correspond to the multiple measurement area among the multiple train passage vibration characteristics; Based on the vibration characteristics of the reused train channel, it is determined whether the multiple real-time channel positions should be merged. When the multiple real-time channel positions are merged, the real-time local position is determined based on the multiple real-time channel positions.

[0008] In some possible implementations, determining the multiple real-time positions of the train based on the vibration characteristics of the multiple train lanes includes: Obtain the measurement area number of the grating array sensing optical cable and the correspondence between the measurement area number and the actual spatial location; Determine the target measurement area numbers corresponding to the vibration characteristics of the multiple train passages; The locations of the multiple real-time channels are determined based on the multiple target survey area numbers and the corresponding relationships.

[0009] In some possible implementations, determining the target measurement area numbers corresponding to the vibration characteristics of the plurality of train passages includes: Determine the numbers of multiple candidate test areas that correspond one-to-one with the vibration characteristics of the multiple train passages; Determine whether the vibration characteristics of each train passage are greater than the first vibration characteristic threshold. When the vibration characteristics of the train passage are greater than the first vibration characteristic threshold, use the candidate test area number as the target test area number.

[0010] In some possible implementations, the plurality of demodulators includes a first demodulator and a second demodulator, and the overlapping train vibration features include a first overlapping train vibration feature obtained by the first demodulator and a second overlapping train vibration feature obtained by the second demodulator; the step of determining whether to merge the plurality of real-time local positions based on the overlapping train vibration features includes: Determine whether both the vibration characteristics of the first overlapping train and the vibration characteristics of the second overlapping train are greater than the second vibration characteristic threshold. When both the first overlapping train vibration feature and the second overlapping train vibration feature are greater than the second vibration feature threshold, the multiple real-time local locations are merged.

[0011] In some possible implementations, the train vibration characteristic is the vibration amplitude.

[0012] In some possible implementations, the plurality of demodulators includes at least one main demodulator and at least one backup demodulator. The demodulation of the plurality of train vibration sub-signals based on the plurality of demodulators includes: Obtain the main demodulator communication status of the at least one main demodulator and the backup demodulator communication status of the at least one backup demodulator; If the communication status of the main demodulator is normal, then the plurality of train vibration sub-signals are demodulated based on the at least one main demodulator; If the communication status of the main demodulator is abnormal and the communication status of the backup demodulator is normal, then the multiple train vibration sub-signals are demodulated based on the at least one backup demodulator.

[0013] On the other hand, the present invention also provides a cross-regional train position tracking device applied to an autonomous sensing system, the autonomous sensing system including a grating array sensing optical cable and multiple demodulators, with an overlapping measurement area between two adjacent demodulators; the cross-regional train position tracking device includes: A vibration signal acquisition unit is used to acquire train vibration signals based on the grating array sensing optical cable, wherein the train vibration signals include multiple train vibration sub-signals corresponding to the multiple demodulators; The signal demodulation unit is used to demodulate the multiple train vibration sub-signals based on the multiple demodulators to determine multiple train vibration characteristics; A real-time local position determination unit is used to determine multiple real-time local positions of the train based on the multiple train vibration characteristics; The cross-regional tracking unit is used to determine the overlapping train vibration features that correspond to the overlapping measurement area among the multiple train vibration features, and to determine whether the multiple real-time local positions should be merged based on the overlapping train vibration features, so as to perform cross-regional tracking of the train.

[0014] On the other hand, the present invention also provides a train positioning device, including a memory and a processor, wherein, The memory is used to store programs; The processor, coupled to the memory, is used to execute the program stored in the memory to implement the steps in the cross-regional train location tracking method described in any of the above possible implementations.

[0015] On the other hand, the present invention also provides a computer-readable storage medium storing a program or instructions that, when executed by a processor, implement the steps in the cross-regional train location tracking method described in any of the above possible implementations.

[0016] The beneficial effects of the above embodiments are as follows: The cross-regional train position tracking method provided by the present invention sets an overlapping measurement area between two adjacent demodulators, and after determining multiple real-time local positions of the train based on multiple train vibration characteristics, it determines the overlapping train vibration characteristics corresponding to the overlapping measurement area among the multiple train vibration characteristics, and determines whether to merge multiple real-time local positions based on the overlapping train vibration characteristics. This realizes that when the train is across different demodulators, multiple real-time local positions can be accurately merged based on the overlapping train vibration characteristics of the overlapping measurement area, thereby improving the accuracy and precision of train position tracking. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic flowchart of an embodiment of the cross-regional train location tracking method provided by the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of an embodiment of S103; Figure 3 For the present invention Figure 2 A schematic diagram of an embodiment of S201; Figure 4 For the present invention Figure 1 A schematic diagram of an embodiment of S102; Figure 5 A schematic diagram of an embodiment of the cross-regional train location tracking device provided by the present invention; Figure 6 This is a schematic diagram of an embodiment of the train positioning device provided by the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] It should be understood that the illustrative drawings are not drawn to scale. The flowcharts used in this invention illustrate operations implemented according to some embodiments of the invention. It should be understood that the operations in the flowcharts may be implemented out of order, and steps without logical contextual relationships may be reversed or performed simultaneously. Furthermore, those skilled in the art, guided by the content of this invention, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor systems and / or microcontroller systems.

[0021] The terms "first," "second," etc., used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a technical feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] This invention provides a method, apparatus, device, and storage medium for cross-regional train location tracking, which will be described below.

[0024] Before demonstrating the embodiments, the following terms will be explained.

[0025] A grating array sensing optical cable refers to a special optical cable containing a grating array fiber, which can collect vibration signals.

[0026] Grating array fiber refers to optical fiber containing a grating array structure.

[0027] A grating is an optical device consisting of a large number of parallel slits of equal width and spacing.

[0028] The measurement area refers to the region between two adjacent gratings, which is the smallest unit for dividing the vibration acquisition area.

[0029] This invention provides a cross-regional train location tracking method applied to an autonomous sensing system. The autonomous sensing system includes a grating array sensing optical cable and multiple demodulators, with overlapping measurement areas between adjacent demodulators; for example... Figure 1 As shown, the cross-regional train location tracking method includes: S101. Train vibration signal is acquired based on grating array sensing optical cable. The train vibration signal includes multiple train vibration sub-signals corresponding to multiple demodulators. S102. Demodulate multiple train vibration sub-signals using multiple demodulators to determine multiple train vibration characteristics; S103. Determine multiple real-time local positions of the train based on multiple train vibration characteristics; S104. Determine the overlapping train vibration characteristics that correspond to the overlapping measurement area among multiple train vibration characteristics, and determine whether to merge multiple real-time local positions based on the overlapping train vibration characteristics, so as to perform cross-regional tracking of the train.

[0030] Compared with the prior art, the cross-regional train position tracking method provided in this embodiment of the invention sets up an overlapping measurement area between two adjacent demodulators. After determining multiple real-time local positions of the train based on multiple train vibration characteristics, it determines the overlapping train vibration characteristics corresponding to the overlapping measurement area among the multiple train vibration characteristics, and determines whether to merge multiple real-time local positions based on the overlapping train vibration characteristics. This enables accurate merging of multiple real-time local positions based on the overlapping train vibration characteristics of the overlapping measurement area when the train is between different demodulators, thereby improving the accuracy and precision of train position tracking.

[0031] In some embodiments of the present invention, each demodulator includes multiple channels, each channel corresponding to several grating measurement areas. The grating measurement area information on the same channel is continuous and complete, which can accurately determine the position change of the train on a channel. To accurately track the train position when the train spans different channels of the same demodulator, in some embodiments of the present invention, a multiplexed measurement area is included between two adjacent channels, and each train vibration feature includes multiple train channel vibration features corresponding to multiple channels; then, as... Figure 2 As shown, step S103 includes: S201. Determine the real-time positions of multiple train passages based on the vibration characteristics of multiple train passages; S202. Determine the vibration characteristics of the reused train passage corresponding to the reused test area among multiple train passage vibration characteristics; S203. Determine whether to merge multiple real-time channel positions based on the vibration characteristics of the shared train channel. When multiple real-time channel positions are merged, determine the real-time local position based on the multiple real-time channel positions.

[0032] This invention, by setting up a multiplexing measurement zone between two adjacent channels, enables the accurate merging of multiple real-time channel positions based on the vibration characteristics of the multiplexing train channel within the multiplexing measurement zone when a train crosses between different channels of the same demodulator, thereby further improving the accuracy and precision of train position tracking.

[0033] In a specific embodiment of the present invention, the process of determining the real-time local position based on multiple real-time channel positions in step S203 is as follows: the position of the reused test area is determined based on the vibration characteristics of the reused train channel, and the position of the real-time channel position after removing the real-time channel position corresponding to the reused test area from the multiple real-time channel positions is combined with the position of the reused test area position as the real-time local position of the train.

[0034] In some embodiments of the present invention, such as Figure 3 As shown, step S201 includes: S301. Obtain the measurement area number of the grating array sensing optical cable and the correspondence between the measurement area number and the actual spatial location; S302. Determine the target measurement area numbers corresponding to the vibration characteristics of multiple train passages; S303. Determine the location of multiple real-time channels based on multiple target survey area numbers and their corresponding relationships.

[0035] Specifically: when the survey area number is 1, the corresponding actual spatial location is 0km-5km of the train route; when the survey area number is 2, the corresponding actual spatial location is 5km-10km of the train route, and so on. The survey area number can be used to represent the entire actual spatial location of the train route.

[0036] In this embodiment of the invention, the actual spatial location can be determined by the survey area number. The method of determining the actual spatial location is simple and can improve the efficiency of train positioning and tracking.

[0037] To avoid pedestrian movement or other disturbances interfering with the vibration characteristics of the train track and affecting train position tracking, in some embodiments of the present invention, step S302 includes: Determine the numbers of multiple candidate test areas that correspond one-to-one with the vibration characteristics of multiple train passages; Determine whether the vibration characteristics of each train passage are greater than the first vibration characteristic threshold. If the vibration characteristics of the train passage are greater than the first vibration characteristic threshold, the candidate test area number will be used as the target test area number.

[0038] In this embodiment of the invention, the candidate test area number when the vibration characteristics of the train passage are greater than the first vibration characteristic threshold is used as the target test area number. This can avoid the interference of pedestrian movement or other disturbances on the vibration characteristics of the train passage, and ensure that the determined target test area number is the test area where the train is traveling, thereby further improving the accuracy and precision of train position tracking.

[0039] It should be understood that the first vibration characteristic threshold can be set or adjusted based on empirical values ​​or actual application scenarios, and no specific limitations are made here.

[0040] In a specific embodiment of the present invention, the multiple demodulators include a first demodulator and a second demodulator, and the overlapping train vibration features include a first overlapping train vibration feature obtained by demodulation by the first demodulator and a second overlapping train vibration feature obtained by demodulation by the second demodulator; then step S104, determining whether to merge multiple real-time local positions based on the overlapping train vibration features, includes: Determine whether the vibration characteristics of the first overlapping train and the vibration characteristics of the second overlapping train are both greater than the second vibration characteristic threshold. When both the vibration characteristics of the first overlapping train and the vibration characteristics of the second overlapping train are greater than the second vibration characteristic threshold, multiple real-time local locations are merged.

[0041] This invention improves the accuracy of train tracking by merging multiple real-time local locations when both the first overlapping train vibration feature and the second overlapping train vibration feature are greater than the second vibration feature threshold. This ensures that the train is traveling across regions, i.e., traveling in the overlapping measurement areas of the first demodulator and the second demodulator.

[0042] It should be understood that the second feature threshold can be set or adjusted based on empirical values ​​or actual application scenarios, and no specific limitations are made here.

[0043] In a specific embodiment of the present invention, the train vibration characteristic is the vibration amplitude.

[0044] To ensure redundancy in vibration signal demodulation, in some embodiments of the present invention, the multiple demodulators include at least one main demodulator and at least one backup demodulator, such as... Figure 4 As shown, step S102 includes: S401. Obtain the communication status of at least one main demodulator and the communication status of at least one backup demodulator. S402. If the communication status of the main demodulator is normal, then multiple train vibration sub-signals are demodulated based on at least one main demodulator. S403. If the communication status of the main demodulator is abnormal and the communication status of the backup demodulator is normal, then multiple train vibration sub-signals are demodulated based on at least one backup demodulator.

[0045] In this embodiment of the invention, the demodulator is first determined before demodulation, which can ensure the accuracy of signal demodulation and thus ensure the accuracy of train position tracking.

[0046] It should be noted that when the communication status of the main demodulator is abnormal and the communication status of the backup demodulator is also abnormal, an alarm signal can be generated to remind the staff to repair the demodulator. After the demodulator restores normal communication, the signal can be demodulated.

[0047] To better implement the cross-regional train location tracking method in this embodiment of the invention, based on the cross-regional train location tracking method, this embodiment of the invention also provides a cross-regional train location tracking device, applied to an autonomous sensing system. The autonomous sensing system includes a grating array sensing optical cable and multiple demodulators, with overlapping measurement areas between adjacent demodulators; such as Figure 5 As shown, the cross-regional train location tracking device 500 includes: The vibration signal acquisition unit 501 is used to acquire train vibration signals based on the cross-regional train position tracking grating array sensing optical cable. The cross-regional train position tracking train vibration signals include multiple train vibration sub-signals corresponding to multiple demodulators for cross-regional train position tracking. The signal demodulation unit 502 is used to demodulate multiple train vibration sub-signals based on multiple demodulators for cross-regional train position tracking, and to determine the vibration characteristics of multiple trains. The real-time local position determination unit 503 is used to determine multiple real-time local positions of a train based on the vibration characteristics of multiple trains tracked across regions. The cross-regional tracking unit 504 is used to determine the overlapping train vibration features corresponding to the overlapping measurement area of ​​the cross-regional train position tracking among multiple train vibration features of cross-regional train position tracking, and to determine whether to merge multiple real-time local positions of cross-regional train position tracking based on the overlapping train vibration features of cross-regional train position tracking, and to perform cross-regional tracking of the cross-regional train position tracking train.

[0048] The cross-regional train location tracking device 500 provided in the above embodiments can realize the technical solutions described in the above cross-regional train location tracking method embodiments. The specific implementation principles of each module or unit can be found in the corresponding content in the above cross-regional train location tracking method embodiments, and will not be repeated here.

[0049] like Figure 6 As shown, the present invention also provides a train positioning device 600. The train positioning device 600 includes a processor 601, a memory 602, and a display 603. Figure 6 Only some components of the train positioning device 600 are shown; however, it should be understood that implementation of all shown components is not required, and more or fewer components may be implemented alternatively.

[0050] In some embodiments, memory 602 may be an internal storage unit of the train positioning device 600, such as a hard disk or memory of the train positioning device 600. In other embodiments, memory 602 may also be an external storage device of the train positioning device 600, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the train positioning device 600.

[0051] Furthermore, the memory 602 may include both internal storage units of the train positioning device 600 and external storage devices. The memory 602 is used to store the application software and various types of data installed on the train positioning device 600.

[0052] In some embodiments, processor 601 may be a central processing unit (CPU), microprocessor, or other data processing chip, used to run program code stored in memory 602 or process data, such as the cross-regional train location tracking method of the present invention.

[0053] In some embodiments, display 603 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 603 is used to display information from the train positioning device 600 and to display a visual user interface. Components 601-603 of the train positioning device 600 communicate with each other via a system bus.

[0054] In some embodiments of the present invention, when the processor 601 executes the cross-regional train location tracking program in the memory 602, the following steps can be implemented: Train vibration signals are acquired based on grating array sensing optical cables. The train vibration signals include multiple train vibration sub-signals corresponding to multiple demodulators. Multiple train vibration sub-signals are demodulated using multiple demodulators to determine the vibration characteristics of multiple trains; Multiple real-time local positions of the train were determined based on multiple train vibration characteristics; Identify overlapping train vibration features among multiple train vibration features that correspond to overlapping measurement areas, and determine whether to merge multiple real-time local locations based on the overlapping train vibration features to perform cross-regional train tracking.

[0055] It should be understood that when the processor 601 executes the cross-regional train location tracking program in the memory 602, in addition to the functions mentioned above, it can also perform other functions, as detailed in the description of the relevant method embodiments above.

[0056] Furthermore, this embodiment of the invention does not specifically limit the type of train positioning device 600 mentioned. The train positioning device 600 can be a portable train positioning device such as a mobile phone, tablet computer, personal digital assistant (PDA), wearable device, or laptop computer. Exemplary embodiments of portable train positioning devices include, but are not limited to, portable train positioning devices running iOS, Android, Microsoft, or other operating systems. The aforementioned portable train positioning device can also be other portable train positioning devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the invention, the train positioning device 600 may not be a portable train positioning device, but rather a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0057] Accordingly, embodiments of the present invention also provide a computer-readable storage medium for storing computer-readable programs or instructions. When the programs or instructions are executed by a processor, they can implement the steps or functions of the cross-regional train location tracking method provided in the above-described method embodiments.

[0058] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware (such as a processor, controller, etc.), and the computer program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0059] The present invention has provided a detailed description of the cross-regional train location tracking method, apparatus, device, and storage medium. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for tracking the location of trains across regions, characterized in that, The method is applied to an autonomous sensing system, which includes a grating array sensing optical cable and multiple demodulators, with overlapping measurement areas between adjacent demodulators; the cross-regional train position tracking method includes: Train vibration signals are acquired based on the grating array sensing optical cable, and the train vibration signals include multiple train vibration sub-signals corresponding to the multiple demodulators; Based on the demodulators, the multiple train vibration sub-signals are demodulated to determine multiple train vibration characteristics; Multiple real-time local positions of the train are determined based on the aforementioned multiple train vibration characteristics; Identify the overlapping train vibration features among the multiple train vibration features that correspond to the overlapping measurement area, and determine whether to merge the multiple real-time local positions based on the overlapping train vibration features, so as to perform cross-regional tracking of the train; Each demodulator includes multiple channels, with a multiplexing measurement area between adjacent channels. Each train vibration feature includes multiple train channel vibration features corresponding to the multiple channels. Determining multiple real-time local positions of the train based on the multiple train vibration features includes: The real-time positions of multiple train passages are determined based on the vibration characteristics of these multiple train passages. Determine the vibration characteristics of the multiple train passages that correspond to the multiple measurement area among the multiple train passage vibration characteristics; Based on the vibration characteristics of the reused train channel, it is determined whether the multiple real-time channel positions should be merged. When the multiple real-time channel positions are merged, the real-time local position is determined based on the multiple real-time channel positions.

2. The cross-regional train location tracking method according to claim 1, characterized in that, The determination of multiple real-time lane positions of the train based on the vibration characteristics of the multiple train lanes includes: Obtain the measurement area number of the grating array sensing optical cable and the correspondence between the measurement area number and the actual spatial location; Determine the target measurement area numbers corresponding to the vibration characteristics of the multiple train passages; The locations of the multiple real-time channels are determined based on the multiple target survey area numbers and the corresponding relationships.

3. The cross-regional train location tracking method according to claim 2, characterized in that, The determination of the multiple target measurement area numbers corresponding to the vibration characteristics of the multiple train passages includes: Determine the numbers of multiple candidate test areas that correspond one-to-one with the vibration characteristics of the multiple train passages; Determine whether the vibration characteristics of each train passage are greater than the first vibration characteristic threshold. When the vibration characteristics of the train passage are greater than the first vibration characteristic threshold, use the candidate test area number as the target test area number.

4. The cross-regional train location tracking method according to claim 1, characterized in that, The plurality of demodulators includes a first demodulator and a second demodulator, and the overlapping train vibration characteristics include a first overlapping train vibration characteristic obtained by demodulation by the first demodulator and a second overlapping train vibration characteristic obtained by demodulation by the second demodulator; The step of determining whether to merge the multiple real-time local locations based on the overlapping train vibration characteristics includes: Determine whether both the vibration characteristics of the first overlapping train and the vibration characteristics of the second overlapping train are greater than the second vibration characteristic threshold. When both the first overlapping train vibration feature and the second overlapping train vibration feature are greater than the second vibration feature threshold, the multiple real-time local locations are merged.

5. The cross-regional train location tracking method according to any one of claims 1-4, characterized in that, The vibration characteristic of the train is the vibration amplitude.

6. The cross-regional train location tracking method according to claim 1, characterized in that, The plurality of demodulators includes at least one main demodulator and at least one backup demodulator. The demodulation of the plurality of train vibration sub-signals based on the plurality of demodulators includes: Obtain the main demodulator communication status of the at least one main demodulator and the backup demodulator communication status of the at least one backup demodulator; If the communication status of the main demodulator is normal, then the plurality of train vibration sub-signals are demodulated based on the at least one main demodulator; If the communication status of the main demodulator is abnormal and the communication status of the backup demodulator is normal, then the multiple train vibration sub-signals are demodulated based on the at least one backup demodulator.

7. A cross-regional train location tracking device, characterized in that, The device is used to perform the method according to any one of claims 1-6, and is applied to an autonomous sensing system, the autonomous sensing system including a grating array sensing optical cable and multiple demodulators, with an overlapping measurement area between two adjacent demodulators; the cross-regional train position tracking device includes: A vibration signal acquisition unit is used to acquire train vibration signals based on the grating array sensing optical cable, wherein the train vibration signals include multiple train vibration sub-signals corresponding to the multiple demodulators; The signal demodulation unit is used to demodulate the multiple train vibration sub-signals based on the multiple demodulators to determine multiple train vibration characteristics; A real-time local position determination unit is used to determine multiple real-time local positions of the train based on the multiple train vibration characteristics; The cross-regional tracking unit is used to determine the overlapping train vibration features that correspond to the overlapping measurement area among the multiple train vibration features, and to determine whether the multiple real-time local positions should be merged based on the overlapping train vibration features, so as to perform cross-regional tracking of the train.

8. A train positioning device, characterized in that, Including memory and processor, among which, The memory is used to store programs; The processor, coupled to the memory, is used to execute the program stored in the memory to implement the steps in the cross-regional train location tracking method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The readable storage medium stores a program or instructions, which, when executed by a processor, implement claim 1. The steps of the cross-regional train location tracking method described in any one of the 6.

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