CN110239598A - Train collision avoidance system based on multiband communication - Google Patents
Train collision avoidance system based on multiband communication Download PDFInfo
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- CN110239598A CN110239598A CN201910430141.XA CN201910430141A CN110239598A CN 110239598 A CN110239598 A CN 110239598A CN 201910430141 A CN201910430141 A CN 201910430141A CN 110239598 A CN110239598 A CN 110239598A
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- train
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- collision avoidance
- control unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning, or like safety means along the route or between vehicles or vehicle trains
- B61L23/08—Control, warning, or like safety means along the route or between vehicles or vehicle trains for controlling traffic in one direction only
- B61L23/14—Control, warning, or like safety means along the route or between vehicles or vehicle trains for controlling traffic in one direction only automatically operated
- B61L23/18—Control, warning, or like safety means along the route or between vehicles or vehicle trains for controlling traffic in one direction only automatically operated specially adapted for changing lengths of track sections in dependence upon speed and traffic density
Abstract
The present invention provides a kind of train collision avoidance systems based on multiband communication, belong to train operation control system technical field.Multiband communication unit including realizing the data communication between two train of front and back on same route；By the distance information transmission between train speed information, two trains to the selection control unit of the early warning control unit；Calculate the unit that tests the speed of the velocity information of train；Calculate the distance exam unit of the practical spacing between two trains of front and back；The operation control unit of Train Detection and Identification signal is obtained according to the practical spacing between the velocity information and two train.The present invention combines traditional wireless communication technology mature at present and has stronger anti-interference ability spread spectrum technic at present, can effectively ensure that the reliable communication between train in complex situations, using the vehicle vehicle radio communication technology, effectively realizes the function of train collision avoidance.
Description
Technical field
The present invention relates to train operation control system technical fields, and in particular to a kind of train based on multiband communication is anti-
Hit system.
Background technique
Train Detection and Identification and train scheduling are the critical systems for guaranteeing train safety, quickly running at present.Train operation
Control system guarantees the safety of train operation by the speed and displacement of control train.The adjustable deviation plan of train scheduling
The case where timetable, makes road network quickly resume normal operation.Since the interaction approach of the two is man-machine interactively, therefore information transmission is difficult
Exempt to will appear error, is unable to ensure real-time.When train breaks down, train operation control system and column not can guarantee not only
The reliable communication of vehicle scheduling, it is also possible to because the fault of dispatcher causes consequence to be serious traffic accident.It is existing to be based on
The train collision avoidance technology and infrared anti-collision technology of GPS system not can guarantee reliable communication of the train under complex environment.
Summary of the invention
The purpose of the present invention is to provide one kind can guarantee train realized under complex environment reliable communication based on more
The train collision avoidance system of band communication, to solve technical problem present in above-mentioned background technique.
To achieve the goals above, this invention takes following technical solutions:
A kind of train collision avoidance system based on multiband communication provided by the invention, comprising: multiband communication unit, channel
Control unit, the unit that tests the speed, distance exam unit and operation control unit；
The multiband communication unit, for realizing the data communication between two train of front and back on same route；
The channel controller, for completing the selection of communication channel, and the train speed that the unit that tests the speed is measured
Practical spacing between two train of front and back that degree information, the distance exam unit measure is transferred to the operation control unit；
The unit that tests the speed, for calculating the velocity information of train；
The distance exam unit, for calculating the practical spacing between two trains of front and back；
The operation control unit, for obtaining train according to the practical spacing between the velocity information and two train
Operation control signal, controls the operating status of train.
Preferably, the multiband communication unit includes spread spectrum communication module and wireless communication module.
Preferably, the wireless communication module is the wireless communication module based on FLRC, FSK or GFSK modulation technique；
The spread spectrum communication module is the frequency-extended communication equipment based on Lora spread spectrum technic.
Preferably, the channel controller is using the secure microprocessor for meeting ASIL-D grade in ISO26262 standard
The spread spectrum communication module is monitored with the wireless communication module, realizes the selection of communication channel；Wherein,
When the practical spacing of current next two columns vehicle is less than 2000 meters, truck traffic is carried out using high-frequency signal；Channel control
The communication of Unit selection high-frequency signal link setup, while low frequency signal being kept to communicate；
When the practical spacing of current next two columns vehicle is greater than 2000 meters, high-frequency signal attenuation is larger, and chain rupture, channel control occurs
The communication of Unit selection low frequency signal.
When two vehicles distance farther out when, using low frequency signal carry out truck traffic.
Preferably, the high-frequency signal is 2.4GHz-5GHz, and the low frequency signal is less than 433MHz.
Preferably, the distance exam unit includes distance calculation module and electronic map correction module；
The distance calculation module, for calculating the linear distance of two vehicles of front and back；
The electronic map correction module obtains two workshop of front and back for being modified to the linear distance
Practical spacing.
Preferably, the distance calculates the linear distance L that not module calculates two vehicles using arrival Time Method,
L=c (t1-t0)
Wherein, c is the spread speed of signal, t0For the sending time of signal, t1For the receiving time of signal.
Preferably, two trains in operation control unit analysis front and back actual motion spacing in orbit, works as reality
Run spacing be less than security protection apart from when, issue brake signal to rear car.
Preferably, described control unit further includes warning module, and two trains in operation control unit analysis front and back exist
Actual motion spacing on track, when actual motion spacing be less than security protection apart from when, warning module send out pre-warning signal.
Preferably, the warning module is sound broadcasting device or display screen.
The invention has the advantages that: combine the traditional wireless communication technology of maturation at present and have stronger anti-interference energy at present
Power spread spectrum technic, the reliable communication under effective guarantee complex situations, using the vehicle vehicle radio communication technology, effectively realization train
The function of anticollision.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is the train collision avoidance system function functional block diagram based on multiband communication described in the embodiment of the present invention 1.
Fig. 2 is the train collision avoidance system function functional block diagram based on multiband communication described in the embodiment of the present invention 2.
Fig. 3 is the train collision avoidance system use state diagram based on multiband communication described in the embodiment of the present invention 2.
Specific embodiment
Embodiments of the present invention are described in detail below, and the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element and/or their group.
In the description of this patent, it is to be understood that term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship, be merely for convenience of description this patent and simplify description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to this patent.
In the description of this patent, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection ", " setting " shall be understood in a broad sense, for example, it may be being fixedly linked, being arranged, may be a detachable connection, set
It sets, or is integrally connected, is arranged.For the ordinary skill in the art, above-mentioned art can be understood as the case may be
The concrete meaning of language in this patent.
It is of the invention for ease of understanding, explanation is further explained to the present invention with specific embodiment with reference to the accompanying drawing, and
Specific embodiment does not constitute the restriction to the embodiment of the present invention.
It should be appreciated by those skilled in the art that attached drawing is the schematic diagram of embodiment, the component in attached drawing is not necessarily
Implement necessary to the present invention.
Embodiment 1
As shown in Figure 1, the embodiment of the present invention 1 provides a kind of train collision avoidance system based on multiband communication, comprising: multifrequency
Section communication unit, channel controller, the unit that tests the speed, distance exam unit and operation control unit；
The multiband communication unit, for realizing the data communication between two train of front and back on same route；
The channel controller, for completing the selection of communication channel, and the train speed that the unit that tests the speed is measured
Practical spacing between two train of front and back that degree information, the distance exam unit measure is transferred to the operation control unit；
The unit that tests the speed, for calculating the velocity information of train；
The distance exam unit, for calculating the practical spacing between two trains of front and back；
The operation control unit, for obtaining train according to the practical spacing between the velocity information and two train
Operation control signal, controls the operating status of train.
The multiband communication unit includes spread spectrum communication module and wireless communication module.
The wireless communication module is the wireless communication module based on FLRC, FSK or GFSK modulation technique；
The spread spectrum communication module is the frequency-extended communication equipment based on Lora spread spectrum technic.
The channel controller uses the secure microprocessor for meeting ASIL-D grade in ISO26262 standard to described
Spread spectrum communication module is monitored with the wireless communication module, realizes the selection of communication channel；Wherein,
When the practical spacing of current next two columns vehicle is less than 2000 meters, truck traffic is carried out using high-frequency signal；Channel control
The communication of Unit selection high-frequency signal link setup, while low frequency signal being kept to communicate；
When the practical spacing of current next two columns vehicle is greater than 2000 meters, high-frequency signal attenuation is larger, and chain rupture, channel control occurs
The communication of Unit selection low frequency signal.
When two vehicles distance farther out when, using low frequency signal carry out truck traffic.
The high-frequency signal is 2.4GHz-5GHz, and the low frequency signal is less than 433MHz.
The distance exam unit includes distance calculation module and electronic map correction module；
The distance calculation module, for calculating the linear distance of two vehicles of front and back；
The electronic map correction module obtains two workshop of front and back for being modified to the linear distance
Practical spacing.
The distance calculates the linear distance L that not module calculates two vehicles using arrival Time Method,
L=c (t1-t0)
Wherein, c is the spread speed of signal, t0For the sending time of signal, t1For the receiving time of signal.
Two trains in operation control unit analysis front and back actual motion spacing in orbit, when actual motion spacing
Less than security protection apart from when, issue brake signal to rear car.
Described control unit further includes warning module, and the operation control unit analysis front and back two trains are in orbit
Actual motion spacing, when actual motion spacing be less than security protection apart from when, warning module send out pre-warning signal.
The warning module is sound broadcasting device or display screen.
Embodiment 2
As shown in Fig. 2, the embodiment of the present invention 2 provides a kind of train collision avoidance system based on multiband communication, the system packet
It includes:
1, multiband communication unit:
Same line is carried out including spread spectrum communication module and traditional wireless communication module, and using two different frequency ranges of height
Data communication between two trains in road front and back.When two vehicles are closer, carried out using with the high high-frequency signal of transmission speed
Truck traffic, using continually information exchange adapts to train lower safety redundancy at this time at a high speed；Two vehicles distance farther out when adopt
Truck traffic is carried out with the low frequency signal with farther transmission range；The structure of the dual communication unit ensures complex situations
Under reliable communication.
2, channel controller:
It is responsible for monitoring and selects most suitable communication channel, by the speed of two trains in front and back obtained by the unit that tests the speed
Practical pitch information between the train that information and distance exam unit measure is transferred to two vehicle of front and back.
3, the distance exam unit:
Including distance calculation module and electronic map correction module, the distance calculation module can be selected arrival time method and survey
The linear distance for obtaining two vehicle of front and back of two vehicles, recycles the electronic map correction module to be modified the linear distance, obtains
To two vehicle actual motion spacing of front and back.
4, the operation control unit:
Processing information simultaneously issues warning signal, brake signal in due course.
As shown in figure 3, two trains run before and after on the same line road, by the multifrequency for being mounted on train head
The train collision avoidance system of Duan Tongxin carries out data communication.Multiband communication unit determine front and back two vehicles basic circuit information and
Column vehicle number information can carry out data communication after successful match.
The distance exam unit includes distance calculation module and electronic map correction module, before distance calculation module measures
The linear distance of two vehicles afterwards, electronic map amending unit are modified the linear distance, obtain between two vehicle actual motion of front and back
Away from.When train is in the more severe communication environment such as tunnel, spread spectrum communication module can be selected as efficient communication list at this time
Member, and the essential information of current train is sent, velocity information and communications status information.Channel controller passes through satisfaction
The secure microprocessor of ASIL-D grade is to the spread spectrum communication module and the traditional wireless communication mould in ISO26262 standard
Block is monitored, surveys current efficient communication channel according to the speed of train, distance, the selection of communication unit working condition.
The traditional wireless communication module, which can be selected, is based on FLRC, FSK, the wireless communication unit of the modulation techniques such as GFSK.
Wherein, the technical foundation of GFSK is in FSK, and the communication technology based on FSK modulation is not only realized and is relatively easy to, antinoise with it is anti-ageing
The better performances subtracted also have the advantages that transmission rate is higher and cost is relatively low, and in short distance, the safety of train operation is superfluous
Remaining is low, and the traffic rate between train is higher with requirement of real-time, and higher communication speed is needed to carry out the frequent information of high speed
Interaction, and high-frequency communication has the advantages that transmission speed is high, therefore using the height of traditional wireless communication module when two vehicles are closer
Band channels carry out truck traffic.For example, being carried out using high band such as 2440MHz frequency range high when current rank rear vehicle is closer
Fast reliable communication；Current rank rear vehicle distance farther out when, long-haul reliable communication is carried out using low-frequency range such as 433MHz frequency range.
The most basic feature of spread spectrum communication is strong antijamming capability, and the extended channel of spread spectrum system is wider, the processing of acquisition
Gain is higher, and jamming margin is bigger, and anti-interference ability is stronger.Receiving end is de-spread using the spreading code synchronous with transmitting terminal
Afterwards, useful signal is restored, and the frequency spectrum of other interference signals is all broadened, so that falling into the interference in inromation bandwidth
Intensity substantially reduces, to inhibit interference.Therefore when train is in the more severe communication environment such as tunnel, expansion can be selected
Frequency communication unit 11 carries out the communication of vehicle vehicle radio.
The unit that tests the speed is responsible for providing required train actual speed information, and velocity radar can be selected or other are mature
Locomotive velocity measuring equipment.
The train speed and front and back train pitch information, rear car that the operation control unit processing receives issue in advance in due course
Alert signal, brake signal.Wherein pre-warning signal can be used that voice carries out casting and display screen show etc. that forms warn driver, examine
Non-timely, it is straight will to generate brake signal for early warning control unit when necessary for the safety for considering train operation and artificial treatment
It connects control train and carries out brake operating.
In conclusion in embodiments of the present invention, in conjunction with the high speed advantage of high-frequency communication and the transmission range of LF communication
Remote advantage, when the train spacing of front and back two is closer, safety redundancy is low, needs higher communication speed to carry out high speed frequent
Information exchange, therefore carry out truck traffic using with the high high-frequency signal of transmission speed when two vehicles are closer；When front and back two
Train spacing farther out when, safety redundancy is high, and information exchange does not have to very frequently, and low frequency signal is in long distance transmission, around
Penetrate better performances but traffic rate be low, thus two vehicles distance farther out when using have the advantages that farther transmission range low frequency signal carry out
Truck traffic；In conjunction with the traditional wireless communication technology of current maturation and at present with stronger anti-interference ability spread spectrum communication skill
Art, the reliable communication under effective guarantee complex situations effectively realize the function of train collision avoidance using the vehicle vehicle radio communication technology.
Those of ordinary skill in the art will appreciate that: the component in device in the embodiment of the present invention can be according to embodiment
Description be distributed in the device of embodiment, corresponding change can also be carried out and be located at one or more dresses different from the present embodiment
In setting.The component of above-described embodiment can be merged into a component, can also be further split into multiple subassemblies.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (10)
1. a kind of train collision avoidance system based on multiband communication characterized by comprising multiband communication unit, channel control
Unit, the unit that tests the speed, distance exam unit and operation control unit processed；
The multiband communication unit, for realizing the data communication between two train of front and back on same route；
The channel controller, for completing the selection of communication channel, and the train speed that the unit that tests the speed is measured is believed
Practical spacing between two train of front and back that breath, the distance exam unit measure is transferred to the operation control unit；
The unit that tests the speed, for calculating the velocity information of train；
The distance exam unit, for calculating the practical spacing between two trains of front and back；
The operation control unit, for obtaining train operation according to the practical spacing between the velocity information and two train
Signal is controlled, the operating status of train is controlled.
2. the train collision avoidance system according to claim 1 based on multiband communication, it is characterised in that:
The multiband communication unit includes spread spectrum communication module and wireless communication module.
3. the train collision avoidance system according to claim 2 based on multiband communication, it is characterised in that:
The wireless communication module is the wireless communication module based on FLRC, FSK or GFSK modulation technique；
The spread spectrum communication module is the frequency-extended communication equipment based on Lora spread spectrum technic.
4. the train collision avoidance system according to claim 3 based on multiband communication, it is characterised in that: the channel control
Unit uses the secure microprocessor for meeting ASIL-D grade in ISO26262 standard to the spread spectrum communication module and the nothing
Line communication module is monitored, realizes the selection of communication channel；Wherein,
When the practical spacing of current next two columns vehicle is less than 2000 meters, truck traffic is carried out using high-frequency signal；Channel controller
The communication of high-frequency signal link setup is selected, while low frequency signal being kept to communicate；
When the practical spacing of current next two columns vehicle is greater than 2000 meters, high-frequency signal attenuation is larger, and chain rupture, channel controller occurs
Select low frequency signal communication.
When two vehicles distance farther out when, using low frequency signal carry out truck traffic.
5. the train collision avoidance system according to claim 4 based on multiband communication, it is characterised in that:
The high-frequency signal is 2.4GHz-5GHz, and the low frequency signal is less than 433MHz.
6. the train collision avoidance system according to claim 1 based on multiband communication, it is characterised in that:
The distance exam unit includes distance calculation module and electronic map correction module；
The distance calculation module, for calculating the linear distance of two vehicles of front and back；
The electronic map correction module obtains the reality in two workshop of front and back for being modified to the linear distance
Spacing.
7. the train collision avoidance system according to claim 6 based on multiband communication, it is characterised in that:
The distance calculates the linear distance L that not module calculates two vehicles using arrival Time Method,
L=c (t1-t0)
Wherein, c is the spread speed of signal, t0For the sending time of signal, t1For the receiving time of signal.
8. the train collision avoidance system according to claim 1 based on multiband communication, it is characterised in that:
Two trains in operation control unit analysis front and back actual motion spacing in orbit, when actual motion spacing is less than
Security protection apart from when, issue brake signal to rear car.
9. the train collision avoidance system according to claim 8 based on multiband communication, it is characterised in that:
Described control unit further includes warning module, two trains in operation control unit analysis front and back reality in orbit
Run spacing, when actual motion spacing be less than security protection apart from when, warning module send out pre-warning signal.
10. the train collision avoidance system according to claim 9 based on multiband communication, it is characterised in that: the early warning mould
Block is sound broadcasting device or display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910430141.XA CN110239598A (en) | 2019-05-22 | 2019-05-22 | Train collision avoidance system based on multiband communication |
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| CN201910430141.XA CN110239598A (en) | 2019-05-22 | 2019-05-22 | Train collision avoidance system based on multiband communication |
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| CN113401174A (en) * | 2021-06-29 | 2021-09-17 | 通号城市轨道交通技术有限公司 | Train operation control method and device based on low-frequency communication |
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