CN113247052B - Train positioning method and system - Google Patents
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- CN113247052B CN113247052B CN202110456423.4A CN202110456423A CN113247052B CN 113247052 B CN113247052 B CN 113247052B CN 202110456423 A CN202110456423 A CN 202110456423A CN 113247052 B CN113247052 B CN 113247052B
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Abstract
The invention relates to a train positioning method and a train positioning system, wherein the method comprises the following steps: acquiring message information in an action domain; and positioning according to the message information and the train running distance. The train positioning method and the train positioning system can compile message information in real time in the action domain and obtain the position and the direction of the train in real time. The vehicle-mounted equipment calculates the relative position of the train running through the special control message, memorizes and restarts the train, provides position information, and realizes the function of automatically converting into complete monitoring after starting.
Description
Technical Field
The invention belongs to the field of train control in the railway industry, and particularly relates to a train positioning method and a train positioning system.
Background
Train operation signal control systems (CTCS-2 and CTCS-3) applied to high-speed passenger special lines in China all depend on ground transponders. A ground responder (transponder for short) is a point-type device which provides key line data (called as message) related to driving safety to a vehicle-mounted control device at a key position of a line through a vehicle-ground information transmission technology so as to realize automatic high-speed safe operation control. During the operation of a railway train, a transponder is one of important basic devices in a train operation control system. As transponders become more and more widely used in railway operation control, maintenance of the transponders becomes more and more important. In order to facilitate the user to rewrite and maintain the transponder message, a special transponder message writing device is needed to rewrite and maintain the transponder. At present, in order to ensure the reliability and safety of communication, a special transponder writing tool and a matched transponder need to have a specific communication mode, so that the transponder is prevented from being rewritten by a transponder reading and writing device of other manufacturers.
The transponder is a point-type device for ground train information transmission, and the main purpose of the transponder is to provide reliable ground information for train-control vehicle-mounted devices. Each transponder (or group of transponders) has a number, and the number is unique across railroads nationwide. The transponder is arranged at an entrance of a block partition or an entrance and exit end of a station, when a train passes through the transponder, the transponder sends a transponder message stored in the transponder or a transponder message transmitted by a ground electronic unit (LEU), and information such as train positioning, line gradient, speed and the like is provided for train control vehicle-mounted equipment. The working principle of the transponder is as follows: various line data (such as line length, gradient, curve, kilometer post, phase change point and the like) on the ground are stored by the transponder; when a train enters the action area of the transponder, a vehicle-mounted BTM (transponder transmission unit) antenna of the train radiates 27.095MHz radio frequency energy to the ground, and after the transponder obtains the energy, the stored message is immediately transmitted to a BTM antenna of a locomotive in an FSK frequency modulation mode with the carrier frequency of 4.23 MHz. After receiving the message of the transponder, the train is amplified, demodulated and decoded and then used for automatic train control of a train control system.
On the current high-speed rail and passenger dedicated line, a ground transponder is usually laid on a sleeper in the middle of a rail to transmit information such as positioning information, line parameters, track circuit parameters, signal point types, temporary speed limit, access and the like to train control vehicle-mounted equipment so as to meet the requirement of train operation control. In order to ensure the safety and the availability of high-speed and high-density train tracking operation, the train control vehicle-mounted equipment needs to acquire complete and correct ground route information in real time in the high-speed operation process. However, limited by the amount of data transmitted by the transponders, the maximum amount of a message transmitted by each transponder is 1023-bit binary number, and the amount of data transmitted by a single transponder usually cannot meet the requirement of safe driving of a train, so that a transponder group consisting of a plurality of transponders is generally laid on a rail, for example, 8 transponders are used as a group and are sequentially arranged on a railway line at certain intervals (3 to 5 meters) along the rail direction to transmit redundant and safe ground line information to the train. Such a transponder group would increase the data volume of the messages sent by the transponders and the number of transponders in the transponder group, which in turn increases the cost in the railway laying process.
In the prior art, the position of a train is usually obtained in a limited manual driving mode, or a train longitude and latitude information sent by a satellite positioning device of the train is received, and an electronic map for recording the position information of a virtual transponder is obtained, wherein the position information comprises a kilometer post and the longitude and latitude information of the virtual transponder; calculating to obtain the speed measurement error envelope of the train according to the longitude and latitude information of the train; according to the speed measurement error envelope and the position information of the virtual transponder, train positioning data when a train passes through the virtual transponder is obtained; and calculating to obtain the position information of the train according to the train positioning data. However, the above virtual transponder has the following problems that a message storage unit needs to be added on the train, message information is stored in advance and cannot be compiled in real time, and the virtual transponder cannot be dynamically set.
On the other hand, the existing entity transponder is a transponder arranged on the site, if the message is variable, ground control equipment needs to be arranged, cables need to be laid, all trains receive the message, outdoor construction and maintenance are needed, the transponder cannot be dynamically arranged, the message cannot be compiled in real time, and the position of the train cannot be obtained in real time.
Therefore, it is desirable to provide a train positioning method and system, which can solve the technical problems existing in the prior art that the number of transponders in a transponder group is large, message information cannot be compiled in real time, and the train position cannot be obtained in real time during train positioning.
Disclosure of Invention
Aiming at the problems, the invention provides a train positioning method and a train positioning system, which can compile message information in an action domain in real time and obtain the position of a train in real time. And the vehicle-mounted equipment calculates the relative position of the train running through the special control message.
A train positioning method, the method comprising:
acquiring message information in an action domain;
and positioning according to the message information and the train running distance.
Further, the acquiring the message information in the scope of action includes:
when a train passes through the entity transponder, the BTM of the train acquires message information in the action domain through the BTM antenna.
Further, the acquiring the message information in the scope of action further includes:
when the train turns back in the action area, the train is powered off, and after the power off, the train-mounted equipment is powered off to memorize message information in the action area; and when the train turns back, the train calls the message information in the action domain.
Further, the positioning according to the message information and the train running distance comprises:
when the train passes through the entity transponder, the BTM of the train receives the message information in the entity transponder through the BTM antenna, and the train determines the current position of the train according to the length of the scope and the difference of the train running distance.
Further, the positioning according to the message information and the train running distance further comprises:
when the train turns back in the action area, the train is powered off, and after the power off, the vehicle-mounted equipment is used for powering off and memorizing the message information in the action area and powering off and memorizing to generate a virtual responder; and when the train turns back, the train calls the position information of the virtual transponder, and the position information of the virtual transponder is the position information of the train.
A train positioning system, the system comprising:
the acquiring unit is used for acquiring message information in the action domain;
and the positioning unit is used for positioning according to the message information and the train running distance.
Further, the obtaining unit is configured to obtain, by the BTM of the train, message information in the action domain through the BTM antenna when the train passes through the entity transponder.
Furthermore, the obtaining unit is also used for powering off the train when the train turns back in the action area, and after the train is powered off, the train stores the message information in the action area; and when the train turns back, the train calls the message information in the action domain.
Further, the positioning unit, configured to position according to the message information and the train driving distance, includes:
when the train passes through the entity transponder, the BTM of the train receives the message information in the entity transponder through the BTM antenna, and the train determines the current position of the train according to the length of the scope and the difference of the train running distance.
Further, the positioning unit, configured to position according to the message information and the train driving distance, further includes:
when the train turns back in the action area, the train is powered off, and after the power off, the vehicle-mounted equipment is used for powering off and memorizing the message information in the action area and powering off and memorizing to generate a virtual responder; and when the train turns back, the train calls the position information of the virtual transponder, and the position information of the virtual transponder is the position information of the train.
The invention has the following beneficial effects:
(1) the train positioning method and the train positioning system greatly reduce the data volume of the message sent by the transponder, thereby greatly reducing the number of the transponders, reducing the cost in the railway laying process, and reserving the lifting space for train-ground information transmission for future speed acceleration of the railway;
(2) the head end in the action area of the train is provided with an entity responder, when the train passes through the entity responder, the train acquires message information in the action area, and the train determines the current position of the train according to the difference between the length of the action area and the train running distance; when the train turns back in the action area, the train is powered off, and after the power off, the vehicle-mounted equipment is used for powering off and memorizing the message information in the action area and powering off and memorizing to generate a virtual responder; and when the train turns back, the train calls the position information of the virtual transponder, and the position information of the virtual transponder is the position information of the train.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
FIG. 1 shows a flow chart of a train location method according to an embodiment of the invention;
FIG. 2 illustrates a diagram of the location relationship of a train and an entity transponder in accordance with an embodiment of the present invention;
FIG. 3 illustrates a location relationship diagram of a train with a scope in accordance with an embodiment of the present invention;
fig. 4 shows a positional relationship diagram of a train and a virtual transponder according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a train positioning method, which is used for positioning a train in real time by acquiring message information and train running distance through the train. The embodiment of the present invention is exemplified by a train-mounted mode and a train turning-back mode, but the present invention is not limited to the train-mounted mode and the train turning-back mode, and any positioning method including a train operation mode can be applied to the present invention.
In the train operation, the train-mounted mode comprises a visual mode, an automatic driving mode (ATO mode), a manual driving mode (PM mode) under ATP monitoring, a limited manual driving mode (RM mode) and a non-limited manual driving mode (NRM mode); the train turn-back mode comprises an unmanned automatic turn-back mode, an ATO (automatic train operation) manned automatic turn-back mode, an artificial turn-back mode under ATP (automatic train protection) monitoring and a limiting artificial turn-back mode.
The train-mounted mode of the embodiment of the invention is exemplarily illustrated by taking a visual mode, a PM mode and a train turning-back mode as examples and an artificial turning-back mode under ATP monitoring, according to the relevant standards of train operation control, under the PM mode, an ATP subsystem determines the maximum allowable operation speed of train operation, a driver drives a train to operate under an ATP-protected speed curve, and the ATP subsystem realizes all functions of automatic train protection; the platform parking and the opening and closing of the car door and the shield door are manually controlled by a driver. Under the artificial turn-back mode under the monitoring of ATP, a driver adopts a 'control handle' to control the train to run, the driver drives the train to run to a turn-back line and stop the train, a driving disc at a driving end and a driving disc at a reverse end are manually closed, and the train is manually driven to enter a departure station track and is positioned and stopped under the supervision of ATP; the driver presses the door opening button to open the vehicle door and the platform screen door.
Illustratively, after the train is started and the integrity of the train is effective, the train enters a visual mode, at the moment, the train-mounted equipment sends the offset between the train head and the entity transponder and the special control message fixed transponder group to the ground equipment, the ground equipment sends the mobile authorization to the train based on the special control message fixed transponder group number, and the train-mounted equipment automatically turns into complete monitoring operation.
The visual mode is an operation mode in which the train passes a stop signal in response to a scheduling command. The vehicle-mounted equipment monitors the running of the train according to the specified ceiling speed, and a driver is responsible for checking the rail free condition. That is, the on-board unit gives a maximum speed limit, and the condition in front of the train is visually checked by the driver. The offset is the running distance between the train head and the entity responder, and the specific calculation method is that the running speed v of the train is obtained according to a speed sensor on the vehicle-mounted equipment, and then the running length L of the train in the action area is obtained according to the running time t1=vt，L1Namely the offset of the train head and the entity responder.
As shown in fig. 1, fig. 1 shows a flowchart of a train positioning method according to an embodiment of the invention. The method comprises the following steps: the train acquires message information in an action domain; and positioning according to the message information and the train running distance. Specifically, the method for determining the scope of train operation comprises the following steps: the head end in the action area is provided with an entity transponder, when a train passes through the entity transponder, the train receives message information in the entity transponder, the message information comprises the length of the action area, the running direction of the train and the like, and the action area length of train operation is determined through the message information.
The entity transponder is a safety point type information transmission device formed by adopting an electromagnetic induction principle and is used for realizing safety information transmission between ground equipment and vehicle-mounted equipment at a fixed place; the transmission system of the transponder comprises a ground device and a vehicle-mounted device, wherein the vehicle-mounted device comprises a transponder transmission unit (BTM), a BTM antenna, a vehicle-mounted ATP, a speed sensor and a computer; the surface equipment includes a physical transponder. The BTM is used for transmitting information of the transponder, and the BTM antenna is used for receiving and transmitting electromagnetic signals; the vehicle-mounted ATP is used for automatically braking when the train exceeds a specified speed, the vehicle-mounted equipment receives ground speed limit information, the ground speed limit information is compared with an actual speed after information processing, and when the actual speed of the train exceeds the speed limit, the braking device controls a train braking system to brake. The vehicle-mounted ATP equipment calculates a target distance continuous speed control mode curve in real time according to basic data such as train data, driving permission (line data and signal permission) and the like, and automatically protects the overspeed of the train according to the curve. And the vehicle-mounted ATP equipment of the intermediate train or the tail train autonomously calculates the speed according to the line data, the train parameters, the speed, the acceleration, the train parameters and the like of the train immediately before the train, and adjusts the interval between the intermediate train and the front train.
And the speed sensor is used for monitoring the running speed of the train in real time. The BTM is one of key devices of train-mounted equipment, and the BTM, a BTM antenna and a ground transponder form a point-type communication system. The BTM antenna includes a transmit coil and a receive coil. When a train runs, the BTM antenna continuously sends electromagnetic energy downwards, when the train passes through the transponder arranged on the ground, the ground transponder receives the electromagnetic energy and sends electromagnetic signals to the BTM antenna, the electromagnetic signals are received and transmitted to the BTM host computer through the transponder antenna, and the BTM host computer processes information received from the transponder.
It should be noted that the message information in the scope of the present invention is the special control message information, the special control message is a new definition message, no existing message corresponds to the special control message, and the new definition message number of the special control message does not conflict with the existing message number. The special control message information is exemplarily shown in table 1, and table 1 shows the content of the special control message information.
TABLE 1 Special control message information
In the verification directions in table 1, Q _ DIR1 is the direction of the ETCS44 packet, Q _ DIR2 is the direction 00 of the CTCS packet, which represents that the transponder is valid in reverse, 01 represents that the transponder is valid in forward, 10 represents that the transponder is valid in both directions, and 11 represents that the transponder is a spare transponder (forward and reverse are related according to the order of transponders in the transponder group, for example, a train passes through the transponder 1 first and then the transponder 2 is valid in forward, passes through the transponder 2 first and then the transponder 1 is valid in reverse, and bidirectional means that both the transponder 1 and the transponder 2 are valid).
The regional relationship between the transponder group and the previous group is fixed to 1 (1 indicates that the region numbers are the same), and the transponder group number is fixed to 16383 (virtual transponder number); the resolution of scope distance/length is 1 m; the position precision of the responder is 0 to +/-63 m, and the resolution is 1 m.
The method for acquiring the message information in the action domain by the train comprises the following steps: the head end in the action domain is provided with an entity responder, and when a train passes through the entity responder, the BTM of the train receives message information in the entity responder through a BTM antenna; when the train turns back in the action area, the train is powered off, and after the power off, the train-mounted equipment is powered off to memorize message information in the action area; and when the train turns back, the train calls the message information in the action domain. It should be noted that, in the embodiment of the present invention, the entity transponder is arranged on the ground in the scope of action, the entity transponder is located at the head end of the scope of action, and the entity transponder only needs to be arranged on the ground as a group of entity transponders, which greatly reduces the number of the transponders.
Exemplarily, in the PM mode, as shown in fig. 2, fig. 2 shows a position relationship diagram of a train and an entity transponder according to an embodiment of the present invention, when the train passes through the entity transponder B1, the entity transponder B1 sends special control message information including the number of its entity transponder B1 to the train, the BTM of the train receives the special control message information sent by the entity transponder B1 through the BTM antenna and sends the special control message information to the computer, the computer analyzes the special control message information to obtain the number of the entity transponder B1, and selects corresponding special control message information content from the storage unit according to the number of the entity transponder B1, the special control message information content includes the related information in table 1, and the train runs according to the special control message information content. It should be noted that, in the embodiment of the present invention, the special control message information is valid when the direction of the special control message information is consistent with the scope direction in the train traveling direction, and the special control message information is valid only in the scope. When the train passes through the entity responder B1, only the special control message information with the same scope direction is used. This information is defined in the special control message information by the direction variables (Q _ DIR1 and Q _ DIR2 in table 1), e.g., the packet is invalid if the train direction is opposite to the scope direction.
The positioning according to the message information and the train running distance comprises the following steps: the head end in the action domain is provided with an entity responder, when a train passes through the entity responder, a BTM (transmitter-receiver module) of the train receives special control message information sent by the entity responder B1 through a BTM antenna, wherein the message information comprises the length of the action domain, the running direction of the train and the like; determining the current position of the train by the train according to the length of the scope and the difference of the train running distance; when the train turns back in the action area, the train is powered off, the number (16383) of the virtual transponder and the offset of the train from the physical transponder B1 are memorized after the vehicle-mounted device is powered off, and the information is sent to the ground-based ground device to send the movement authorization based on the virtual transponder.
Specifically, when the train turns back in the action area, the train is powered off, and after the power off, the train is the special control message information memorized by the vehicle-mounted equipment in a power-off mode, wherein the special control message information comprises the virtual transponder number and the offset from the physical transponder B1. The method comprises the steps that a virtual responder is generated in real time by a train according to running position information, and the position information of the virtual responder is the position information of the train. The vehicle-mounted equipment is linked to the physical responder B1, the physical responder B1 sends a link packet which is linked with a virtual responder (the virtual responder is information which is memorized after power failure and recalled after restarting), and after the physical responder B1 is linked with the virtual responder, the offset of the train from the physical responder B1 can be obtained, and the position of the train can also be determined according to the offset.
In the PM mode, as shown in fig. 3, fig. 3 is a diagram showing a position relationship between a train and a scope according to an embodiment of the present invention, where a specific length L of the train when a BTM of the train is connected to the scope is obtained, a running speed v of the train is obtained according to a speed sensor on the vehicle-mounted device, and a running length L of the train in the scope is further obtained according to a calculation of a running time t1= vt, train length of travel L in scope1I.e., the real-time location of the train, i.e., the distance length of the train from the physical transponder B1, until the train stops when it returns within the field of action.
In the manual retracing mode under ATP monitoring, as shown in fig. 4, fig. 4 shows a position relationship diagram of a train and a virtual transponder according to an embodiment of the present invention. When the train returns back in the action area of the physical transponder B1, the train changes the end, the train exits the original mode and enters the standby mode, and the driver inputs the train data again at the start after changing the end, for example, the data of the train length, the train weight, the train running direction and the like. The train generates a virtual transponder in real time with the current position information, so the virtual transponder is dynamic, can be generated in real time according to the position where the train runs, and is linked to the physical transponder B1 to determine the position information of the physical transponder B1. At this time, the information of the special control message sent by the entity responder B1 includes the number (16383) of the virtual responder, the offset of the train from the entity responder B1, and the road conditions in the action domain (for example, whether there is an obstacle vehicle in front of the train, the line gradient, the line speed, the track section, the special section, the mileage, the station track data, the station track number, the grade conversion, the station name, the block system, the special line sign, the temporary speed limit, the temporary change prompt of the speed limit, and the like). Obtaining the running length L of the train in the action area according to the advancing speed v and the time t of the train1= vt, thereby calculating the real-time distance between the train head and the scope end as L2=L-L1(L is the length of the scope), L2I.e., the offset of the train from the physical transponder B1, completes the positioning.
According to the train positioning method provided by the invention, when a train runs into an action area, the head end of the action area of the train is provided with an entity responder, when the train passes through the entity responder, the train acquires message information in the action area, and the train determines the current position information of the train according to the length of the action area and the running distance of the train; when the train reaches the scope of action and turns back, the train generates a virtual transponder according to the running position information, the train receives the message information in the entity transponder, and the current position information of the train is positioned according to the position of the virtual transponder. When the train runs out of the action area, the ordinary message information is sent through an entity responder arranged on the ground, the road condition on the ground is detected in real time, and the position information of the train is determined according to the running distance of the train. The train positioning method provided by the invention can still provide accurate positioning in time when the train is in a train-mounted mode or a train turning-back mode, and different required message information can be obtained according to different positions.
The invention also provides a train positioning system, which comprises: the train control system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring message information in an action domain by a train; and the positioning unit is used for positioning according to the message information and the train running distance.
The method comprises the following steps that an entity responder is arranged at the head end in an action domain, and when a train passes through the entity responder, a BTM (base transceiver module) of the train acquires message information in the action domain through a BTM antenna; the train protection system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for powering off a train when the train turns back in an action area, and after the power off, the train stores message information in the action area in a power off memory mode by vehicle-mounted equipment; and when the train turns back, the train calls the message information in the action domain.
The positioning unit is used for specifically positioning according to the special control message and the train running distance and comprises the following steps: when the train passes through the entity transponder, the BTM of the train receives the message information in the entity transponder through the BTM antenna, and the train determines the current position of the train according to the difference between the length of the scope and the train running distance; when the train turns back in the action area, the train is powered off, and after the power off, the vehicle-mounted equipment is used for powering off and memorizing the message information in the action area and powering off and memorizing to generate a virtual responder; and when the train turns back, the train calls the position information of the virtual transponder, and the position information of the virtual transponder is the position information of the train.
In the embodiment of the invention, the scope of action refers to the action length of the train in operation; the special control message is a message in the scope, and includes the length of the scope and the line information in the scope.
In the embodiment of the invention, the train operation refers to the moving operation of a train according to a specified route in the railway transportation production process, except for the arrival, departure, passing and operation of the train in a station, all the purpose movements of rolling stock are generally called as trains, and the rolling stock moves on the station line or other lines for the purposes of disassembling and marshalling the train, picking up, transferring, finishing, transferring, picking and delivering the train, aligning, transferring, entering and exiting the locomotive and the like.
In the embodiment of the present invention, the special control packet refers to packet information of a train in an action domain, and includes ground line information on an action domain line, such as information and parameters of whether there is an obstacle vehicle ahead, a line gradient, a line speed, a track section, a special section, a mileage, a track data, a track number, a grade conversion, a station name, a block system, a line special sign, a temporary speed limit change prompt, and the like.
In the embodiment of the present invention, the common message refers to message information of a train outside an action domain, and includes ground line information in the action domain, such as information and parameters of whether there is an obstacle vehicle ahead, a line gradient, a line speed, a track section, a special section, mileage, track data, a track number, grade conversion, a station name, a block system, a line special sign, a temporary speed limit change prompt, and the like.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A train positioning method, characterized in that the method comprises:
acquiring message information in an action domain;
positioning according to the message information and the train running distance;
the acquiring of the message information in the scope includes:
when the train turns back in the action area, the train is powered off, and after the power off, the train-mounted equipment is powered off to memorize message information in the action area; and when the train turns back, the train calls the message information in the action domain.
2. The train positioning method according to claim 1,
the acquiring the message information in the scope of action further includes:
when a train passes through the entity transponder, the BTM of the train acquires message information in the action domain through the BTM antenna.
3. The train positioning method according to claim 1,
the positioning according to the message information and the train running distance comprises the following steps:
when the train passes through the entity transponder, the BTM of the train receives the message information in the entity transponder through the BTM antenna, and the train determines the current position of the train according to the length of the scope and the difference of the train running distance.
4. The train positioning method according to claim 1,
the positioning according to the message information and the train running distance further comprises:
when the train turns back in the action area, the train is powered off, and after the power off, the vehicle-mounted equipment is used for powering off and memorizing the message information in the action area and powering off and memorizing to generate a virtual responder; and when the train turns back, the train calls the position information of the virtual transponder, and the position information of the virtual transponder is the position information of the train.
5. A train positioning system, the system comprising:
the acquiring unit is used for acquiring message information in the action domain;
the positioning unit is used for positioning according to the message information and the train running distance;
the acquisition unit is used for powering off the train when the train turns back in the action area, and after the power off, the train is powered off and the message information in the action area is memorized by the vehicle-mounted equipment; and when the train turns back, the train calls the message information in the action domain.
6. The train positioning system of claim 5,
the obtaining unit is further configured to obtain, by the BTM of the train, message information in the action domain through the BTM antenna when the train passes through the entity transponder.
7. The train positioning system of claim 5,
the positioning unit is used for positioning according to the message information and the train running distance and comprises:
when the train passes through the entity transponder, the BTM of the train receives the message information in the entity transponder through the BTM antenna, and the train determines the current position of the train according to the length of the scope and the difference of the train running distance.
8. The train positioning system of claim 5,
the positioning unit is used for positioning according to the message information and the train running distance and further comprises:
when the train turns back in the action area, the train is powered off, and after the power off, the vehicle-mounted equipment is used for powering off and memorizing the message information in the action area and powering off and memorizing to generate a virtual responder; and when the train turns back, the train calls the position information of the virtual transponder, and the position information of the virtual transponder is the position information of the train.
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| CN111071302B (en) * | 2018-10-19 | 2021-11-16 | 北京全路通信信号研究设计院集团有限公司 | Train positioning correction method based on virtual transponder |
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