CN109204387B - Train positioning system and method - Google Patents
Train positioning system and method Download PDFInfo
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- CN109204387B CN109204387B CN201710526296.4A CN201710526296A CN109204387B CN 109204387 B CN109204387 B CN 109204387B CN 201710526296 A CN201710526296 A CN 201710526296A CN 109204387 B CN109204387 B CN 109204387B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000005855 radiation Effects 0.000 claims description 25
- 230000004913 activation Effects 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
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- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention provides a train positioning system and a train positioning method, wherein the system comprises at least two reader antennas, the at least two reader antennas are used for respectively receiving a carrier signal with a first frequency sent by an electronic tag, an inquiry message is modulated on the carrier signal with the first frequency and used for positioning a train, and each reader antenna respectively sends the received carrier signal with the first frequency to a reader host; the reader host analyzes the received at least two carrier signals with the first frequency respectively to obtain a plurality of inquiry messages, and positions the train based on the plurality of inquiry messages. By the method and the device, the reading success rate of the electronic tag can be effectively improved, and the positioning accuracy of the train is improved.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a train positioning system and method.
Background
In the related technology, each reader host is provided with a reader antenna, when a train runs above an electronic tag and the electronic tag is in the radiation range of the reader antenna, the two can carry out data communication, and the radiation range of the reader to the tag at least needs to meet the requirement that when the train passes above the electronic tag at the highest speed, a query and feedback cycle of one-time communication can be completed between the two, namely one-time data communication is completed. In order to prevent the missed reading, the radiation range of the reader antenna to the electronic tag is often set to be more than 2 times of data communication between the reader antenna and the electronic tag when the reader antenna passes above the electronic tag, that is, the radiation range of the reader antenna needs to be adjusted to be more than 2 times of communication intervals.
In this way, the larger the radiation range of the reader antenna is, the higher the reading success rate of the electronic tag is, but the lower the positioning accuracy of the train is.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, an object of the present invention is to provide a train positioning system, which can effectively improve the success rate of reading electronic tags and improve the positioning accuracy of a train.
The invention also aims to provide a train positioning method.
In order to achieve the above object, a train positioning system according to an embodiment of a first aspect of the present invention includes: the system comprises at least two reader antennas, a main reader unit and a plurality of reader antennas, wherein the at least two reader antennas are used for respectively receiving carrier signals of a first frequency sent by an electronic tag, inquiry messages are modulated on the carrier signals of the first frequency and used for positioning the train, and each reader antenna respectively sends the received carrier signals of the first frequency to a reader main unit; the reader host analyzes the received at least two carrier signals with the first frequency respectively to obtain a plurality of inquiry messages, and positions the train based on the inquiry messages.
In the train positioning system provided by the embodiment of the first aspect of the present invention, at least two reader antennas respectively receive the carrier signals of the first frequency sent by the electronic tag, the reader host respectively analyzes the received at least two carrier signals of the first frequency to obtain a plurality of inquiry messages, and the train is positioned based on the plurality of inquiry messages, so that the success rate of reading the electronic tag is effectively improved, and the positioning accuracy of the train is improved.
In order to achieve the above object, a train positioning method provided in an embodiment of a second aspect of the present invention is applied to a train positioning system, where the train positioning system includes: at least two reader antennas, and a reader host, including: the at least two reader antennas are used for respectively receiving carrier signals of a first frequency sent by the electronic tags, inquiry messages are modulated on the carrier signals of the first frequency and used for positioning the train, and each reader antenna respectively sends the received carrier signals of the first frequency to the reader host; the reader host analyzes the received at least two carrier signals with the first frequency respectively to obtain a plurality of inquiry messages, and positions the train based on the inquiry messages.
According to the train positioning method provided by the embodiment of the second aspect of the invention, at least two reader antennas are used for respectively receiving the carrier signals with the first frequency sent by the electronic tag, the reader host is used for respectively analyzing the received at least two carrier signals with the first frequency to obtain a plurality of inquiry messages, and the train is positioned based on the plurality of inquiry messages, so that the reading success rate of the electronic tag is effectively improved, and the positioning accuracy of the train is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a train positioning system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a train positioning system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an overlapping area of antenna radiation ranges according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a train positioning system according to another embodiment of the present invention;
fig. 5 is a schematic flow chart of a train positioning method according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of a train positioning method according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Fig. 1 is a schematic structural diagram of a train positioning system according to an embodiment of the present invention.
Referring to fig. 1, the train positioning system 100 includes: the system comprises at least two reader antennas 101, wherein the at least two reader antennas 101 are used for respectively receiving carrier signals of a first frequency sent by an electronic tag 103, inquiry messages are modulated on the carrier signals of the first frequency and used for positioning trains, and each reader antenna 101 respectively sends the received carrier signals of the first frequency to a reader host 102. The reader host 102 analyzes the received at least two carrier signals with the first frequency respectively to obtain a plurality of inquiry messages, and positions the train based on the plurality of inquiry messages.
In an embodiment of the present invention, the train positioning system 100 includes: the system comprises at least two reader antennas 101, wherein the at least two reader antennas 101 are used for respectively receiving carrier signals of a first frequency sent by an electronic tag 103, inquiry messages are modulated on the carrier signals of the first frequency and used for positioning trains, and each reader antenna 101 respectively sends the received carrier signals of the first frequency to a reader host 102.
In the related technology, each reader host is provided with a reader antenna, when a train runs above an electronic tag and the electronic tag is in the radiation range of the reader antenna, the two can carry out data communication, and the radiation range of the reader to the tag at least needs to meet the requirement that when the train passes above the electronic tag at the highest speed, a query and feedback cycle of one-time communication can be completed between the two, namely one-time data communication is completed. In order to prevent the missed reading, the radiation range of the reader antenna to the electronic tag is often set to be more than 2 times of data communication between the reader antenna and the electronic tag when the reader antenna passes above the electronic tag, that is, the radiation range of the reader antenna needs to be adjusted to be more than 2 times of communication intervals. In this way, the larger the radiation range of the reader antenna is, the higher the reading success rate of the electronic tag is, but the lower the positioning accuracy of the train is.
In the embodiment of the invention, in order to improve the reading success rate of the electronic tag 103 and improve the positioning accuracy of the train, at least two reader antennas 101 may be configured at the bottom of the train car, that is, two or more reader antennas 101 are configured, and the train is positioned by the at least two reader antennas 101, so that the reading success rate of the electronic tag 103 is improved and the positioning accuracy of the train is improved.
In an embodiment of the present invention, the query message is used for locating the current driving position of the train, and the query message is generated and transmitted by the electronic tag 103 arranged on the track. Specifically, the electronic tag 103 disposed on the track may generate and transmit the query message when in an active state.
Optionally, the signal radiation ranges of the at least two reader antennas 101 have an overlapping intersection region, and when the electronic tag 103 is in the overlapping intersection region of the signal radiation ranges, the at least two reader antennas 101 respectively receive the carrier signal of the first frequency sent by the electronic tag 103.
Optionally, at least two reader antennas 101 are oppositely arranged at the bottom of the train at a preset angle.
The preset angle may be set by a train factory program according to an empirical value, or may be adjusted by a train manager according to an actual number of the configured reader antennas 101, which is not limited herein.
Referring to fig. 2, fig. 2 is a schematic diagram of a train positioning system in the embodiment of the present invention. Wherein, include: the system comprises two reader antennas 201, electronic tags 202 and a reader host 203, wherein the two reader antennas 201 are oppositely arranged at the bottom of a train at a preset angle A, the electronic tags 202 are arranged on a track where the train passes, the reader host 203 is arranged inside the train, when the train passes through the radiation range of carrier signals sent by the two reader antennas 201 on the track, the electronic tags on the track are triggered to enter an activated state, inquiry messages for positioning the train are generated, the messages are modulated onto the carrier signals with a first frequency, then the carrier signals are sent, and at least two reader antennas 201 respectively receive the carrier signals with the first frequency sent by the electronic tags and position the train based on the inquiry messages.
In the embodiment of the present invention, at least two reader antennas 101 are oppositely disposed at the bottom of the train at a preset angle, so that signal radiation ranges of the at least two reader antennas 101 intersect each other to a certain extent, that is, there is an antenna radiation range overlapping area, see fig. 3, where fig. 3 is a schematic diagram of the antenna radiation range overlapping area in the embodiment of the present invention. In the specific implementation process, when the electronic tag is in the antenna radiation range overlapping area, the at least two reader antennas respectively receive the carrier signal of the first frequency sent by the electronic tag, respectively analyze the carrier signal to obtain a plurality of position data, and determine a positioning area based on the plurality of position data, wherein each position data can be, for example, a position range, and then, the overlapping range of the plurality of position ranges is taken as the positioning area, the reader host can position the train based on the positioning area, and the positioning accuracy can be improved by determining the positioning area based on the plurality of position data.
Optionally, in an embodiment of the present invention, before at least two reader antennas 101 are used to respectively receive a carrier signal of a first frequency sent by the electronic tag 103, each reader antenna 101 is further configured to modulate an inquiry signal onto the carrier signal of a second frequency, and perform transmission processing on the carrier signal of the second frequency, where the inquiry signal is used to perform activation processing on the electronic tag 103, where the first frequency and the second frequency are the same or different.
Each reader antenna 101 transmits a carrier signal with a second frequency, and the electronic tag 103 can enter an activated state when receiving the carrier signal with the second frequency transmitted by any reader antenna 101, so that the reading success rate of the electronic tag 103 is improved, and the activation efficiency of the electronic tag 103 is guaranteed.
At least two reader antennas 101 simultaneously receive the carrier signal of the first frequency transmitted by the electronic tag 103. The real-time performance of positioning the train is guaranteed, and the train positioning accuracy is further guaranteed.
In an embodiment of the present invention, the train positioning system 100 includes: the reader host 102 analyzes the received at least two carrier signals with the first frequency respectively to obtain a plurality of inquiry messages, and positions the train based on the plurality of inquiry messages.
Optionally, locating the train based on a plurality of inquiry messages may include: analyzing each inquiry message respectively to obtain position data corresponding to each inquiry message; the train is located based on the plurality of location data.
Because the signal radiation ranges of at least two reader antennas 101 have overlapping cross areas, the position data corresponding to the inquiry messages received by each reader antenna 101 may be different or the same, and therefore, in the embodiment of the present invention, the positioning accuracy can be effectively improved by performing the positioning according to the inquiry messages received by the plurality of reader antennas 101.
After each reader antenna 101 sends the received carrier signal with the first frequency to the reader host 102, the reader host 102 can analyze each carrier signal in the received carrier signals with the first frequencies respectively to obtain an inquiry message modulated on each carrier signal, and because the transmitting directions of each carrier signal are different, a train is positioned through a plurality of inquiry messages, and the positioning accuracy of the train can be improved.
In one embodiment of the present invention, referring to fig. 4, the train positioning system 100 further comprises:
the electronic tag 103 is configured to trigger to enter an activated state when receiving a carrier signal of a second frequency sent by any one of the reader antennas 101, modulate an inquiry packet stored in the electronic tag onto the carrier signal of the first frequency, and transmit the modulated carrier signal of the first frequency at the same time.
The second frequency may be a frequency different from the first frequency, and if the first frequency is different from the second frequency, crosstalk between two paths of signals may be avoided, which is not limited.
In this embodiment, the at least two reader antennas respectively receive the carrier signals of the first frequency sent by the electronic tag, the reader host respectively analyzes the received carrier signals of the at least two first frequencies to obtain a plurality of inquiry messages, and the train is positioned based on the plurality of inquiry messages, so that the reading success rate of the electronic tag is effectively improved, and the positioning accuracy of the train is improved.
Fig. 5 is a schematic flow chart of a train positioning method according to an embodiment of the present invention.
The method is applied to a train positioning system, and the train positioning system comprises the following steps: at least two reader antennas, and a reader host.
Referring to fig. 5, the method includes:
s51: the at least two reader antennas are used for respectively receiving the carrier signals of the first frequency sent by the electronic tags, the carrier signals of the first frequency are modulated with inquiry messages, the inquiry messages are used for positioning the train, and each reader antenna respectively sends the received carrier signals of the first frequency to the reader host.
Optionally, at least two reader antennas respectively receive the carrier signal of the first frequency sent by the electronic tag at the same time.
S52: the reader host analyzes the received at least two carrier signals with the first frequency respectively to obtain a plurality of inquiry messages, and positions the train based on the plurality of inquiry messages.
Optionally, locating the train based on a plurality of inquiry messages includes: analyzing each inquiry message respectively to obtain position data corresponding to each inquiry message; and determining a positioning area according to the plurality of position data so as to position the train based on the positioning area.
Optionally, the signal radiation ranges of the at least two reader antennas have an overlapping intersection region, and when the electronic tag is located in the overlapping intersection region of the signal radiation ranges, the at least two reader antennas respectively receive the carrier signal of the first frequency sent by the electronic tag.
Optionally, at least two reader antennas are oppositely arranged at the bottom of the train at a preset angle.
Optionally, in some embodiments, referring to fig. 6, before S51, the method further comprises:
s61: and modulating the inquiry signal to a carrier signal with a second frequency, transmitting the carrier signal with the second frequency, wherein the inquiry signal is used for activating the electronic tag, and the first frequency is different from the second frequency.
S62: when receiving a carrier signal of a second frequency sent by any reader antenna, triggering to enter an activated state, modulating an inquiry message stored in the activated state onto the carrier signal of the first frequency, and simultaneously transmitting the modulated carrier signal of the first frequency.
It should be noted that the explanation of the embodiment of the train positioning system 100 in the foregoing embodiments of fig. 1 to fig. 4 also applies to the train positioning method in this embodiment, and the implementation principle is similar, and is not repeated here.
In this embodiment, the at least two reader antennas respectively receive the carrier signals of the first frequency sent by the electronic tag, the reader host respectively analyzes the received carrier signals of the at least two first frequencies to obtain a plurality of inquiry messages, and the train is positioned based on the plurality of inquiry messages, so that the reading success rate of the electronic tag is effectively improved, and the positioning accuracy of the train is improved.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A train positioning system, comprising:
the system comprises at least two reader antennas, a main reader unit and a plurality of reader antennas, wherein the at least two reader antennas are used for respectively receiving carrier signals of a first frequency sent by an electronic tag, inquiry messages are modulated on the carrier signals of the first frequency and used for positioning the train, and each reader antenna respectively sends the received carrier signals of the first frequency to a reader main unit;
the reader host analyzes the received at least two carrier signals with the first frequency respectively to obtain a plurality of inquiry messages, and positions the train based on the inquiry messages;
said locating said train based on said plurality of inquiry messages comprises:
analyzing each inquiry message respectively to obtain position data corresponding to each inquiry message;
determining a positioning area according to a plurality of position data to position the train based on the positioning area;
the at least two reader antennas are arranged at the bottom of the train at a preset angle:
the signal radiation ranges of the at least two reader antennas are overlapped and crossed, and the electronic tag is located in the overlapped and crossed area of the signal radiation ranges.
2. The train positioning system of claim 1, wherein,
each reader antenna is further configured to modulate an inquiry signal onto a carrier signal with a second frequency, and perform transmission processing on the carrier signal with the second frequency, where the inquiry signal is used to perform activation processing on the electronic tag.
3. The train positioning system of claim 2, wherein the first frequency and the second frequency are not the same.
4. The train positioning system of claim 2, further comprising:
and the electronic tag is used for triggering to enter an activated state when receiving the carrier signal of the second frequency sent by any reader antenna, modulating the inquiry message stored in the electronic tag to the carrier signal of the first frequency, and simultaneously transmitting the modulated carrier signal of the first frequency.
5. The train positioning system of claim 1, wherein the at least two reader antennas simultaneously receive a carrier signal of a first frequency transmitted by the electronic tag.
6. A train positioning method is characterized by being applied to a train positioning system, wherein the train positioning system comprises: at least two reader antennas and a reader host, wherein the method comprises the following steps:
the at least two reader antennas are used for respectively receiving carrier signals of a first frequency sent by the electronic tags, inquiry messages are modulated on the carrier signals of the first frequency and used for positioning the train, and each reader antenna respectively sends the received carrier signals of the first frequency to the reader host;
the reader host analyzes the received at least two carrier signals with the first frequency respectively to obtain a plurality of inquiry messages, and positions the train based on the inquiry messages;
said locating said train based on said plurality of inquiry messages comprises:
analyzing each inquiry message respectively to obtain position data corresponding to each inquiry message;
determining a positioning area according to a plurality of position data to position the train based on the positioning area;
the at least two reader antennas are oppositely arranged at the bottom of the train at a preset angle;
the signal radiation ranges of the at least two reader antennas are overlapped and crossed, and when the electronic tag is located in the overlapped and crossed region of the signal radiation ranges, the at least two reader antennas respectively receive carrier signals of the first frequency sent by the electronic tag.
7. The train positioning method as claimed in claim 6, further comprising:
modulating an inquiry signal to a carrier signal with a second frequency, and transmitting the carrier signal with the second frequency, wherein the inquiry signal is used for activating the electronic tag, and the first frequency is different from the second frequency.
8. The train positioning method of claim 7, wherein the first frequency and the second frequency are different.
9. The train positioning method of claim 7, further comprising:
and triggering to enter an activated state when receiving the carrier signal of the second frequency sent by any reader antenna, modulating the inquiry message stored in the activated state onto the carrier signal of the first frequency, and simultaneously transmitting the modulated carrier signal of the first frequency.
10. The train positioning method according to claim 6, wherein the at least two reader antennas simultaneously receive the carrier signal of the first frequency transmitted by the electronic tag.
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| CN201710526296.4A CN109204387B (en) | 2017-06-30 | 2017-06-30 | Train positioning system and method |
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| CN201710526296.4A CN109204387B (en) | 2017-06-30 | 2017-06-30 | Train positioning system and method |
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| CN109204387B true CN109204387B (en) | 2020-06-19 |
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| CN110321745B (en) * | 2019-07-08 | 2023-09-29 | 北京信息科技大学 | Method for resolving conflict of multiple readers and distributed positioning system |
| CN112678032B (en) * | 2020-11-25 | 2022-03-11 | 西南交通大学 | Position detection device for magnetic levitation train and use method thereof |
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