Tunnel positioning system

Abstract

The utility model provides a tunnel positioning system, which comprises tunnel side equipment and vehicle-mounted side equipment, and is characterized in that the tunnel side equipment comprises one or more positioning base stations located in a tunnel and satellite signal communication equipment; the positioning base stations are in communication connection through a leaky coaxial cable, and the satellite signal communication equipment is in communication connection with any positioning base station through the leaky coaxial cable; the leaky coaxial cable is at least fixed on one side of the tunnel and transmits a positioning signal through the hole groove; the vehicle-mounted side equipment comprises a first vehicle console, a first vehicle-mounted terminal, a first vehicle roof antenna, a first in-vehicle antenna, a switch and at least one in-vehicle mobile terminal, wherein the first in-vehicle antenna is used for transmitting positioning signals with the in-vehicle mobile terminal. According to the invention, the leaky coaxial cable is arranged in the tunnel to transmit the positioning signal, and the train is provided with the roof antenna, the in-train antenna and other devices which communicate with the in-train mobile terminal, so that the positioning signal in the leaky coaxial cable can be forwarded to the in-train mobile terminal, and the accurate positioning of the in-train mobile terminal in the tunnel is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of indoor positioning, and particularly relates to a tunnel positioning system. BACKGROUND

[0002] In an outdoor open environment, a mobile terminal on a high-speed train can be positioned in real time through a global positioning system (GPS) or a Beidou satellite, but when the train enters a tunnel or other indoor environment, the mobile terminal on the train cannot search for a satellite signal or the searched satellite signal is very weak, so that the mobile terminal cannot be accurately positioned in the tunnel.

[0003] In the prior art, in order to provide stable positioning requirements for the mobile terminal on the train entering the tunnel, a conventional method is to install multiple single-point radiation antennas in the tunnel to position the mobile terminal on the train through the single-point radiation antennas.

[0004] However, when the mobile terminal on the train needs to be accurately positioned in a long tunnel, a large number of single-point radiation antennas need to be arranged in the tunnel, which leads to very complex installation and deployment, and each single-point radiation antenna is difficult to uniformly cover every corner of the tunnel, which also increases the debugging difficulty. CONTENT OF THE UTILITY MODEL

[0005] In view of the above problems, the application aims to provide a tunnel positioning system, which utilizes the application advantages of a leaky cable in long strip and branch tunnel scenes, so that the positioning signals emitted by the leaky cable can uniformly and fully cover the entire tunnel, and the problems of complex deployment of conventional positioning systems and weak positioning signals received by the mobile terminal on the train in the tunnel are solved.

[0006] In order to achieve the above purpose, the application provides a tunnel positioning system, comprising:

[0007] A tunnel side device, comprising one or more positioning base stations located in the tunnel and a satellite signal communication device; the one or more positioning base stations are connected through a leaky cable, and the satellite signal communication device is connected with any positioning base station through the leaky cable; the leaky cable is fixed to one side of the tunnel and extends in the same direction as the tunnel, and a plurality of holes are arranged on the leaky cable; the leaky cable transmits positioning signals through the holes.

[0008] The vehicle-mounted side device comprises a first vehicle console, a first vehicle terminal, a first roof antenna, a first in-vehicle antenna, a switch and at least one in-vehicle mobile terminal. One end of the first in-vehicle antenna is in communication connection with the first vehicle console, and the other end is in wireless communication connection with the in-vehicle mobile terminal. One end of the first vehicle terminal is in communication connection with the switch, and the other end is in communication connection with the first vehicle console. The first roof antenna is in communication connection with the first vehicle console. The first roof antenna is used for transmitting a positioning signal with the leaky cable. The first in-vehicle antenna is used for transmitting a positioning signal with the in-vehicle mobile terminal.

[0009] In a possible embodiment, the vehicle-mounted side device further comprises a second vehicle console, a second vehicle terminal and a second roof antenna.

[0010] One end of the second vehicle terminal is in communication connection with the switch, and the other end is in communication connection with the second vehicle console. The second roof antenna is in communication connection with the second vehicle console, and the second roof antenna is used for receiving and sending a positioning signal.

[0011] The first vehicle console, the first vehicle terminal and the first roof antenna are arranged at one end of the train, and the second vehicle console, the second vehicle terminal and the second roof antenna are arranged at the other end of the train.

[0012] In a possible embodiment, the vehicle-mounted side device further comprises a second in-vehicle antenna, one end of which is in communication connection with the second vehicle console, and the other end is in wireless communication connection with the in-vehicle mobile terminal.

[0013] The first in-vehicle antenna is arranged at one end of the train, and the second in-vehicle antenna is arranged at the other end of the train.

[0014] In a possible embodiment, it further comprises:

[0015] The station side device comprises a station mobile terminal, which is in wireless communication connection with the first in-vehicle antenna.

[0016] In a possible embodiment, the satellite signal communication device is one, which is arranged at one end of the tunnel.

[0017] In a possible embodiment, the satellite signal communication device is two, which are arranged at two ends of the tunnel respectively.

[0018] In a possible embodiment, the leaky cables are symmetrically arranged on both sides of the tunnel.

[0019] In a possible embodiment, the arrangement height of the leaky cables is consistent with the window height of the train.

[0020] In a possible embodiment, the holes on the leaky cable on both sides of the tunnel are staggered and equidistantly distributed.

[0021] In a possible embodiment, the positioning base station is a micro base station.

[0022] The tunnel positioning system provided in the present application comprises a tunnel side device located in a tunnel and a vehicle side device located on a train, wherein the tunnel side device comprises one or more positioning base stations and a satellite signal communication device, the positioning base stations are connected through a leaky cable, and the satellite signal communication device is connected with any positioning base station through the leaky cable, the leaky cable is fixed to at least one side of the tunnel, and can transmit a positioning signal through holes on the leaky cable; the vehicle side device comprises a first vehicle console, a first vehicle terminal, a first roof antenna, a first indoor antenna, a switch and at least one indoor mobile terminal, one end of the first indoor antenna is connected with the first vehicle console in communication, and the other end is connected with the indoor mobile terminal in wireless communication, one end of the first vehicle terminal is connected with the switch in communication, and the other end is connected with the first vehicle console in communication; the first roof antenna is connected with the first vehicle console in communication; the first roof antenna is used for transmitting the positioning signal with the leaky cable; and the first indoor antenna is used for transmitting the positioning signal with the indoor mobile terminal. Since the leaky cable is arranged in the tunnel to transmit the positioning signal, the roof antenna and the indoor antenna which are connected with the indoor mobile terminal are installed on the train, the positioning signal in the leaky cable can be forwarded to the indoor mobile terminal, and thus the accurate positioning of the indoor mobile terminal in the tunnel is realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the present application.

[0024] Figure 1 A structural schematic diagram of a tunnel positioning system provided for an embodiment of the present application;

[0025] Figure 2 A structural schematic diagram of a tunnel positioning system provided for an embodiment of the present application; Figure 1 A module structural diagram of a tunnel positioning system in a scene;

[0026] Figure 3 A module structural diagram of a tunnel positioning system provided for another embodiment of the present application;

[0027] Figure 4 A module structural diagram of a tunnel positioning system provided for another embodiment of the present application;

[0028] Figure 5 A schematic diagram of a leaky cable arrangement in a tunnel provided for another embodiment of the present application.

[0029] The specific embodiments of the application will be described with reference to the accompanying drawings. These drawings and the associated description herein are not meant to impose limitations on the scope of the application, but are intended to be reference specific embodiments of the application.

[0030] Reference Signs List:

[0031] 100 - tunnel; 200 - positioning base station; 300 - leaky cable; 301 - hole slot;

[0032] 400 - train; 401 - first vehicle console; 402 - first vehicle roof antenna; 403 - first vehicle terminal; 404 - first in-vehicle antenna; 405 - switch; 406 - in-vehicle mobile terminal; 407 - second vehicle console; 408 - second vehicle terminal; 409 - second vehicle roof antenna; 410 - second in-vehicle antenna; 411 - station mobile terminal;

[0033] 500 - satellite signal communication device; 600 - positioning satellite. DETAILED DESCRIPTION

[0034] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, unless otherwise indicated, like numbers in the drawings indicate like components. The following detailed description of the exemplary embodiments is not intended to limit the scope of the application, as claimed. Rather, the following detailed description of several exemplary embodiments is intended to describe some ways in which the application can be practiced. The objectives, features and advantages of the application will be better understood from the following detailed description taken in conjunction with the accompanying drawings.

[0035] In the embodiments of the present application, the terms "first", "second", and the like are used to distinguish between similar or identical items or components having substantially the same function and purpose. Those skilled in the art will understand that the terms "first", "second", and the like do not limit the number and execution order, and the terms "first", "second", and the like do not necessarily mean different.

[0036] It should be noted that the terms "exemplary" and "for example" are used herein to mean "an example of" or "an example, only. Any implementation described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other implementations. Rather, the term "exemplary" or "for example" is intended to convey that the described implementation is an example of one way to implement the application. In the application, "at least one" means one or more, and "multiple" means two or more.

[0037] It should be noted that the term "at" in the embodiments of the present application can be at the moment when a certain condition occurs, or can be within a certain period of time after the occurrence of a certain condition, and the embodiments of the present application do not make specific limitations.

[0038] In order to clearly describe the technical solutions of the embodiments of the present application, the following briefly introduces some terms and technologies involved in the embodiments of the present application:

[0039] Leaky cable: the abbreviation of leaky cable, leaky cable is a special coaxial cable, the outer conductor is not continuous, but has slots or gaps at certain intervals, so that electromagnetic waves can leak out of the cable and realize wireless transmission. The transmission mode of leaky cable is different from that of traditional coaxial cable. It not only propagates longitudinal electromagnetic waves, but also propagates transverse electromagnetic waves. This special transmission mode enables leaky cable to realize wireless communication in complex environments such as tunnels.

[0040] In an outdoor open environment, a mobile terminal can be positioned in real time with the help of a satellite and a base station, but when the mobile terminal is in an indoor environment, such as a tunnel, the mobile terminal cannot search for satellite or base station signals, or the searched positioning signals are very weak, making it difficult for the mobile terminal to accurately position in the tunnel. At present, the conventional method installs multiple single-point radiating antennas in the tunnel. The antennas receive the positioning request of the mobile terminal and then calculate the position of the mobile terminal through the base station or satellite, and send the positioning information back to the mobile terminal, so that the mobile terminal obtains the positioning information. However, when the mobile terminal needs to accurately position in a long tunnel, the number of antennas to be arranged in the tunnel will increase significantly, which will lead to very complex installation and deployment, and the radiation of each antenna is difficult to uniformly cover every corner of the tunnel, which also increases the debugging difficulty.

[0041] In order to solve the above problems, the embodiments of the present application provide a tunnel positioning system. The tunnel positioning system transmits positioning signals by arranging leaky cables in the tunnel. The train is installed with roof antennas, in-vehicle antennas and other devices that communicate with in-vehicle mobile terminals, which can realize the forwarding of positioning signals in the leaky cables to in-vehicle mobile terminals, thereby realizing accurate positioning of in-vehicle mobile terminals in the tunnel.

[0042] Figure 1 The structural diagram of the tunnel positioning system provided by an embodiment of the present application is shown. The diagram shows the scene after the train enters the tunnel. Figure 2 For Figure 1 The module structure diagram of the tunnel positioning system in the scene is shown. The diagram shows the communication connection relationship between each device in the tunnel positioning system.

[0043] Referring to Figure 1 and Figure 2 , the tunnel positioning system provided by the embodiment includes a tunnel side device and a vehicle-mounted side device, wherein the tunnel side device is located in the tunnel 100, and the vehicle-mounted side device is located on the train 400.

[0044] The tunnel side device comprises one or more positioning base stations 200 and a satellite signal communication device 500. The one or more positioning base stations 200 are connected to each other through the leaky cable 300, and the satellite signal communication device 500 is connected to any of the positioning base stations 200 through the leaky cable 300. The leaky cable 300 is fixed to one side of the tunnel 100 and extends along the tunnel 100, and a plurality of holes 301 are formed in the leaky cable 300. The leaky cable 300 transmits positioning signals through the holes 301.

[0045] The vehicle side device comprises a first vehicle console 401, a first vehicle terminal 403, a first vehicle roof antenna 402, a first vehicle antenna 404, a switch 405, and at least one vehicle mobile terminal 406. One end of the first vehicle antenna 404 is connected to the first vehicle console 401, and the other end is wirelessly connected to the vehicle mobile terminal 406. One end of the first vehicle terminal 403 is connected to the switch 405, and the other end is connected to the first vehicle console 401. The first vehicle roof antenna 402 is connected to the first vehicle console 401. The first vehicle roof antenna 402 is used to transmit positioning signals with the leaky cable 300. The first vehicle antenna 404 is used to transmit positioning signals with the vehicle mobile terminal 406.

[0046] In this embodiment, the positioning base station 200 is used to transmit synchronization signals and store and process positioning signals. Considering the environment in the tunnel, the positioning base station 200 is preferably a micro base station, which has a small size and low power consumption and can be easily installed on the side wall of the tunnel.

[0047] The number of positioning base stations is determined according to the length of the tunnel. Generally, the interval between base stations is 300-600 meters. The satellite signal communication device 500 is used to transmit positioning requests to the positioning satellite 600 and receive positioning signals returned by the positioning satellite 600.

[0048] In a specific embodiment, as shown in Figure 1 The positioning base station 200 is provided with two positioning base stations 200, which are fixed to one side of the tunnel 100 through the leaky cable 300. In this way, the leaky cable 300 can transmit wireless signals in the tunnel 100 through the plurality of holes 301.

[0049] In another specific embodiment, as shown in Figure 1 The satellite signal communication device 500 is provided with one satellite signal communication device 500, which is arranged at one end of the tunnel 100. In an urban environment, the satellite signal strength at both ends of the tunnel 100 is relatively stable, so that only one satellite signal communication device 500 needs to be arranged at one end of the tunnel 100, thereby reducing the cost.

[0050] The satellite signal communication device 500 is used to forward the positioning request to the positioning satellite 600, and then receive the positioning signal returned by the positioning satellite 600 and send the positioning signal to the leaky cable 300.

[0051] In another specific embodiment, two satellite signal communication devices 500 are arranged at both ends of the tunnel 100. In a suburban environment, the satellite signals at both ends of the tunnel 100 are different. For example, in a mountain tunnel 100, when the positioning satellite 600 moves to one side of the tunnel 100, the satellite signal communication device 500 at this side can transmit better positioning signals. At this time, the in-vehicle mobile terminal 406 in the tunnel 100 can preferentially obtain the positioning signal returned by the satellite signal communication device 500 at this side. In this way, no matter which side of the tunnel 100 the positioning satellite 600 is located, the satellite signal communication device 500 can obtain stable positioning signals, thereby providing a guarantee for accurate positioning.

[0052] In this embodiment, the switch 405 is used to realize the forwarding filtering and data management functions of the positioning signal, which can be installed in the control room of the train 400. The first vehicle console 401 is located at the end of the control room of the train 400, and can display the position of the train 400 in the tunnel 100 after calling the map engine.

[0053] In the above embodiment, if the train 400 needs to be positioned, the positioning request can be sent by the first vehicle terminal 403. The first vehicle console 401 sends the positioning request to the tunnel 100 through the first vehicle roof antenna 402. The hole slot 301 on the leaky cable 300 receives the positioning request and sends it to the positioning satellite 600 through the satellite signal communication device. The positioning satellite 600 returns the positioning signal, which is sent to the tunnel 100 through the satellite signal communication device 500 and the leaky cable 300 in turn. The first vehicle roof antenna 402 receives the positioning signal and forwards it to the first vehicle console 401. The first vehicle console 401 displays the current position of the train 400 in the tunnel 100 according to the positioning signal, thereby realizing the tunnel positioning of the train 400.

[0054] In the above embodiment, if the in-vehicle mobile terminal 406 on the train 400 needs to be positioned, the in-vehicle mobile terminal 406 sends a positioning request to the first in-vehicle antenna 404. Similarly, the positioning request is sent to the positioning satellite 600 through the first vehicle console 401, the first vehicle roof antenna 402, the leaky cable 300, and the satellite signal communication device 500. The positioning satellite 600 returns the positioning signal, which is sent to the in-vehicle mobile terminal 406 through the satellite signal communication device 500, the leaky cable 300, the first vehicle roof antenna 402, the first vehicle console 401, and the first in-vehicle antenna 404 in turn, thereby realizing the accurate positioning of the in-vehicle mobile terminal 406 in the tunnel 100.

[0055] Figure 3A module structure diagram of the tunnel positioning system is provided for another embodiment of the present application, which is compared with Figure 2 The vehicle-side device is further limited in the embodiment shown. As shown in Figure 2 In the tunnel positioning system provided by the embodiment, the vehicle-side device further includes a second vehicle console 407, a second vehicle terminal 408, and a second roof antenna 409.

[0056] One end of the second vehicle terminal 408 is in communication connection with the switch 405, and the other end is in communication connection with the second vehicle console 407. The second roof antenna 409 is in communication connection with the second vehicle console 407, and the second roof antenna 409 is used for receiving and sending positioning signals.

[0057] In the embodiment, for the train 400 with double-head control rooms, such as light rail, subway, etc., Figure 3 The vehicle-side device of the embodiment shown in the above is equivalent to having Figure 2 two sets of station-side devices of the embodiment shown in the above. At this time, the first vehicle console 401, the first vehicle terminal 403, and the first roof antenna 402 are arranged in the control room at one end of the train 400, and the second vehicle console 407, the second vehicle terminal 408, and the second roof antenna 409 are arranged in the control room at the other end of the train 400.

[0058] In a specific embodiment, the vehicle-side device further includes a second in-vehicle antenna 410, one end of which is in communication connection with the second vehicle console 407, and the other end is in wireless communication connection with the in-vehicle mobile terminal 406. In the embodiment, the first in-vehicle antenna 404 is arranged in the control room at one end of the train 400, and the second in-vehicle antenna 410 is arranged in the control room at the other end of the train 400. In this way, the positioning signal receiving effect of the in-vehicle mobile terminal 406 can be ensured.

[0059] In another specific embodiment, for a longer train 400 with multiple carriages, a third in-vehicle antenna, a fourth in-vehicle antenna, etc. can also be arranged in the vehicle according to the length. For example, two in-vehicle antennas are arranged in each vehicle, so that stable wireless positioning signals can be received by each carriage.

[0060] In the above embodiment, the tunnel positioning system respectively arranges devices for transmitting and receiving positioning signals at both ends of the train 400, which can further improve the positioning accuracy of the train 400 and the in-vehicle mobile terminal 406.

[0061] Figure 4 A module structure diagram of the tunnel positioning system is provided for another embodiment of the present application, which is compared with Figure 1 the positioning scenario shown in the above. As shown in Figure 2 The tunnel positioning system provided by the embodiment further includes a station-side device.

[0062] In this embodiment, the station-side equipment includes at least one station mobile terminal 411, which is wirelessly connected to the first in-vehicle antenna 404.

[0063] In the above embodiment, after the train 400 enters the tunnel 100, the station mobile terminal 411 can receive the positioning signal using the first in-vehicle antenna 404. The specific process of acquiring the positioning signal of the in-vehicle mobile terminal 406 can be referred to, and will not be repeated here. Therefore, after the train enters the tunnel, the station mobile terminal 411 on the platform can also obtain an accurate positioning signal. It should be noted that even if the train does not enter the tunnel, the station mobile terminal 411 inside the tunnel 100 can still achieve tunnel positioning using other methods, such as using UWB (Ultra Wide Band) positioning technology.

[0064] In one specific embodiment, if the train 400 is also equipped with a second in-vehicle antenna 410, a third in-vehicle antenna, etc., the station mobile terminal 411 can select a suitable in-vehicle antenna to obtain a positioning signal based on the signal strength.

[0065] Figure 5 This is a schematic diagram of leaky cable installation in a tunnel, provided for another embodiment of this application. Figure 5 As shown, in the tunnel positioning system provided in this embodiment, the leaky cables 300 are symmetrically arranged on both sides of the tunnel 100. This provides a more stable positioning signal for mobile terminals inside the tunnel, especially for Y-shaped or more complex tunnel structures. Accordingly, each leaky cable 300 requires a corresponding tunnel-side device.

[0066] In one specific implementation, the height of the leaky cable 300 is the same as the height of the window of the train 400. In this embodiment, the positioning signal can penetrate the glass more easily and is closer to the roof antenna, so that the positioning signal is forwarded to the in-vehicle mobile terminal 406 through the roof antenna and the in-vehicle antenna.

[0067] In another specific implementation, the slots 301 on the leaky cables 300 on both sides of tunnel 100 are distributed at equal intervals and alternately. For example... Figure 5 As shown, the spacing between the slots 301 on each leaky cable 300 is d. Generally, the slot spacing is between 0.5 and 1.5 m. Any slot 301 on one side of the leaky cable 300 is positioned relative to the midpoint of two adjacent slots 301 on the other side of the leaky cable 300. In this embodiment, the distribution of the slots 301 allows the positioning signal to maintain uniform radiation in the more complex environment of the tunnel 100, thereby providing accurate positioning for the train 400, the in-vehicle mobile terminal 406, and even the station mobile terminal 411.

[0068] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A tunnel positioning system, characterized by, The application relates to a tunnel-side device and a vehicle-side device. The tunnel-side device comprises one or more positioning base stations (200) located in a tunnel (100) and a satellite signal communication device (500); the one or more positioning base stations (200) are communicatively connected through a leaky cable (300), and the satellite signal communication device (500) is communicatively connected with any positioning base station (200) through the leaky cable (300); the leaky cable (300) is fixed to one side of the tunnel (100) and extends in the same direction as the tunnel (100), and a plurality of holes (301) are arranged on the leaky cable (300); and the leaky cable (300) transmits positioning signals through the holes (301). The vehicle-side device comprises a first vehicle console (401), a first vehicle terminal (403), a first roof antenna (402), a first vehicle antenna (404), a switch (405) and at least one vehicle mobile terminal (406); one end of the first vehicle antenna (404) is communicatively connected with the first vehicle console (401), and the other end is wirelessly connected with the vehicle mobile terminal (406); one end of the first vehicle terminal (403) is communicatively connected with the switch (405), and the other end is communicatively connected with the first vehicle console (401); the first roof antenna (402) is communicatively connected with the first vehicle console (401); the first roof antenna (402) is used for transmitting positioning signals with the leaky cable (300); and the first vehicle antenna (404) is used for transmitting positioning signals with the vehicle mobile terminal (406).

2. The tunnel positioning system of claim 1, wherein, The vehicle-side device further comprises a second vehicle console (407), a second vehicle terminal (408) and a second roof antenna (409). One end of the second vehicle terminal (408) is communicatively connected with the switch (405), and the other end is communicatively connected with the second vehicle console (407); the second roof antenna (409) is communicatively connected with the second vehicle console (407), and the second roof antenna (409) is used for receiving and sending positioning signals; The first vehicle console (401), the first vehicle terminal (403) and the first roof antenna (402) are arranged at one end of a train (400), and the second vehicle console (407), the second vehicle terminal (408) and the second roof antenna (409) are arranged at the other end of the train (400).

3. The tunnel positioning system of claim 2, wherein, The vehicle-side device further comprises a second vehicle antenna (410), one end of which is communicatively connected with the second vehicle console (407), and the other end is wirelessly connected with the vehicle mobile terminal (406); The first vehicle antenna (404) is arranged at one end of the train (400), and the second vehicle antenna (410) is arranged at the other end of the train (400).

4. The tunnel positioning system of claim 1, wherein, The application further relates to a station-side device. The station-side device comprises at least one station mobile terminal (411), which is wirelessly connected with the first vehicle antenna (404).

5. The tunnel positioning system according to any one of claims 1 to 4, characterized in that, The satellite signal communication device (500) is one, which is arranged at one end of the tunnel (100).

6. The tunnel positioning system according to any one of claims 1 to 4, characterized in that, The satellite signal communication device (500) is two, which are arranged at two ends of the tunnel (100) respectively.

7. The tunnel positioning system according to any one of claims 1 to 4, wherein The leak cable (300) is symmetrically arranged on both sides of the tunnel (100).

8. The tunnel positioning system of claim 7, wherein, The arrangement height of the leak cable (300) is consistent with the window height of the train (400).

9. The tunnel positioning system of claim 7, wherein, The holes (301) on the leak cable (300) on both sides of the tunnel (100) are staggered and distributed at equal intervals.

10. The tunnel positioning system according to any one of claims 1 to 4, wherein, The positioning base station (200) is a micro base station.

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