CN206327390U - Train follows the trail of early warning system - Google Patents
Train follows the trail of early warning system Download PDFInfo
- Publication number
- CN206327390U CN206327390U CN201621048616.7U CN201621048616U CN206327390U CN 206327390 U CN206327390 U CN 206327390U CN 201621048616 U CN201621048616 U CN 201621048616U CN 206327390 U CN206327390 U CN 206327390U
- Authority
- CN
- China
- Prior art keywords
- train
- wireless distance
- distance finding
- trail
- early warning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
Early warning system, including range cells, control unit and alarm unit are followed the trail of the utility model discloses a kind of train, the range cells and the alarm unit are electrically connected with described control unit respectively；Described control unit is used to send control instruction to the range cells, the range cells are used to measure the spacing between the preceding train on same traffic direction and rear train by wireless distance finding mode after receiving control instruction, and described control unit is additionally operable to control the alarm unit to be alarmed according to the spacing.Train of the present utility model follows the trail of early warning system can realize that train is prevented knocking into the back based on wireless distance finding technology, the utility model adapts to the rail line environment under a variety of environment such as tunnel, ramp and topography and geomorphology, without relying on the existing equipment of train, it can be limited and be influenceed independently of existing train control system and not by existing train control system.
Description
Technical field
The utility model is related to a kind of rail transit train automation field, and more particularly to a kind of train follows the trail of early warning
System.
Background technology
In recent years, the development of China's rail vehicle transportation is swift and violent, in status advanced in the world.But, as track is handed over
The extension of path net and crisscross, less and less running interval and the train speed of continuous improvement, make track traffic
The huge challenge of security facing, the train that " 7.23 " and " 9.27 " accident indicates current China has lacked in the process of running
Monitoring means kind, with continuity and real-time, lacks more reliable measure for the monitoring for following the trail of running train.Cause
This, in the process of running, front and rear train must keep enough spacing distances to rail transit train, and normal conditions requirement is more than row
The braking distance of car, to ensure the safe operation of train.
At present both at home and abroad independently of wide variety of conventional track traffic circulation control system outside be used for train safety
The associated authorization patent of train collision avoidance has 2：One be Application No. CN200920034397.0 utility model patent description
A kind of rear-end collision prevention monitor for train, the device installs wireless encoding emitting/receiving in train head's tailstock, and rear car is continuous
Transmitting sequence encoded signal forwards, current rank rear car distance, which is close to wireless encoding emitting/receiving, can carry out channel radio
During letter, it becomes possible to carry out radio communication to realize anti-knock into the back.Because radio signal transmission is by channel fading and multi-path influence, connect
There is randomness in the signal intensity received, therefore the maximum distance fluctuation of radio communication is larger, cause the anti-spacing fluctuation knocked into the back
It is larger, there is uncertainty.In field of urban rail, train braking distance is no more than 200 meters, therefore train is prevented knocking into the back
Spacing it is shorter, only 100 meters, at this in rank, the communication distance of wireless encoding emitting/receiving is more difficult to
Accurately define.
Another describes a kind of " bullet train anticollision for Application No. CN201120280339.3 utility model patent
Hit anti-safety device in hot pursuit ", the device carries out front truck, foreign matter and rail break detection and then anticollision using image recognition technology.The former
Need GPS (i.e. Global Navigation Satellite System, English abbreviation GNSS) satellite
The measured values such as signal, odometer and eddy current sensor carry out fusion and obtain train position velocity information, while also needing to be based on rail
The electronic map of road network, which to be positioned just analyse whether, there is a possibility that collision.The latter needs to install figure ON TRAINS
As collecting device is detected, it is limited in scope, may well below bullet train safe stopping distance, cause it to be applicable
Scope is relatively limited and then influences it to promote the use of.
In summary analysis understands that track train running environment is complex, and train follows the trail of early warning system and equipment is resisted
Jamming performance and range accuracy require higher.
Utility model content
The technical problems to be solved in the utility model is to overcome train ranging tailgating-proof system ranging in the prior art
Fluctuation is larger and needs to follow the trail of early warning system there is provided a kind of train by the defect of train existing equipment.
The utility model is to solve above-mentioned technical problem by following technical proposals：
The utility model provides a kind of train and follows the trail of early warning system, and its feature is, including range cells, control unit
And alarm unit, the range cells and the alarm unit are electrically connected with described control unit respectively；
Described control unit is used to send control instruction to the range cells, and the range cells are used to receive control
The spacing between the preceding train on same traffic direction and rear train is measured by wireless distance finding mode after system instruction, it is described
Control unit is additionally operable to control the alarm unit to be alarmed according to the spacing.
It is preferred that the range cells include being arranged at the first wireless distance finding terminal of the headstock of the rear train and set
The second wireless distance finding terminal of the tailstock of the preceding train is placed in, the first wireless distance finding terminal includes the first timer, institute
Stating the second wireless distance finding terminal includes the second timer；
The first wireless distance finding terminal is used to send the first modulated signal to the second wireless distance finding terminal and controlled
First timer starts timing；
The second wireless distance finding terminal is used for after first modulated signal is received to first modulated signal
Handled and control second timer to start timing, and sent after completion processing to the first wireless distance finding terminal
First response signal simultaneously controls second timer to stop timing, obtains timing time T2；
The first wireless distance finding terminal is used to control first timer after first response signal is received
Stop timing, obtain timing time T1；
The range cells be used for according to equation below measure be located at same traffic direction on preceding train and rear train it
Between spacing：
D=c* (T1-T2)/2；Wherein d represents the spacing, and c represents the light velocity.
It is preferred that the second wireless distance finding terminal is additionally operable to send the second modulation letter to the first wireless distance finding terminal
Number and control second timer to start timing；
The first wireless distance finding terminal is additionally operable to after second modulated signal is received to the described second modulation letter
Number handled and control first timer to start timing, and sent out after completion processing to the second wireless distance finding terminal
Send the second response signal and control first timer to stop timing, obtain timing time T4；
The second wireless distance finding terminal is used to control second timer after second response signal is received
Stop timing, obtain timing time T3；
The range cells be used for according to equation below measure be located at same traffic direction on preceding train and rear train it
Between spacing：
D=c* (T1-T2+T3-T4)/4；Wherein d represents the spacing, and c represents the light velocity.
It is preferred that first modulated signal, first response signal, second modulated signal, second sound
Induction signal is chirp (coded pulse technology) signal.
It is preferred that the train, which follows the trail of early warning system, also includes label reader, the label reader, which is used to obtain, to be marked
The label information of label is simultaneously transmitted to described control unit, and the label is arranged at outbound mouthful and storage mouth, and described control unit is used
In the traffic direction that train is obtained according to the label information.
It is preferred that the label is arranged at the bearing of trend of the facing point of outbound mouthful and storage mouth.
It is preferred that the label is passive RFID (REID) label.
It is preferred that the label information of the label storage includes current of traffic information and forward box situation is believed
Breath.
It is preferred that described control unit is additionally operable to control the alarm unit to show the spacing.
It is preferred that the range cells also include antenna and/or single-bit matched filter.
Positive effect of the present utility model is：Train of the present utility model follows the trail of early warning system can be based on wireless
Ranging technology realizes that train is anti-and knocked into the back that the utility model adapts to the track under a variety of environment such as tunnel, ramp and topography and geomorphology
Traffic route environment, can be independently of existing train control system and not by existing row without relying on the existing equipment of train
The limitation and influence of vehicle control.The utility model uses RFID REIDs in train outbound, with pattern certainly
Main identification function, efficiently avoid the Adjacent track interference of distance measuring signal.The utility model can effectively improve and supervise existing system
The safe train operation situation that system is provided, occurring accident in external environment causes this abnormal pole of train operation control system
When end situation occurs, the auxiliary that can turn into train driver and dispatcher as the extra supplement of existing operation control system is controlled
System, it is to avoid the accident of train from overtaking collision occur to effectively improve the system safety of track traffic.
Brief description of the drawings
Fig. 1 follows the trail of the structural representation of early warning system for the train of preferred embodiment of the present utility model.
Fig. 2 follows the trail of the installation configuration signal of the range cells of early warning system for the train of preferred embodiment of the present utility model
Figure.
Embodiment
The utility model is further illustrated below by the mode of embodiment, but is not therefore limited in the utility model
Among described scope of embodiments.
As shown in figure 1, train of the present utility model, which follows the trail of early warning system, includes range cells 1, control unit 2, alarm list
Member 3 and label reader 4, wherein, the range cells 1, the alarm unit 3 and the label reader 4 are and institute
Control unit 2 is stated to electrically connect；
Described control unit 2 is used to send control instruction to the range cells 1, and the range cells 1 are used to receive
The spacing between the preceding train on same traffic direction and rear train is measured by wireless distance finding mode after to control instruction,
Described control unit 2 then sets the mode of operation of the range cells 1 automatically, and the spacing and secure threshold are compared,
If judging, the spacing is more than the secure threshold, and train continues normal operation, if judging the spacing no more than institute
Secure threshold is stated, then controls the alarm unit 3 to be alarmed, it is possible to controls the alarm unit 3 to show the spacing.
In the utility model, the range cells 1 use wireless distance finding technology, as shown in Fig. 2 the range cells 1
The first wireless distance finding terminal 11 including the headstock that is arranged at rear train and it is arranged at the tailstock of preceding train and second wireless surveys
Away from terminal 12, the first wireless distance finding terminal 11 includes the first timer, and the second wireless distance finding terminal 12 includes second
Timer；The main process of the range cells measurement spacing is as follows：
The first wireless distance finding terminal 11 sends the first modulated signal to the second wireless distance finding terminal 12 and controlled
First timer starts timing；
The second wireless distance finding terminal 12 is entered after first modulated signal is received to first modulated signal
Row handles and controls second timer to start timing, and sends first to first wireless distance finding 11 after completion processing
Response signal simultaneously controls second timer to stop timing, obtains the timing time T of second timer2；
The first wireless distance finding terminal 11 controls first timer to stop after first response signal is received
Only timing, obtains the timing time T of first timer1；
The second wireless distance finding terminal 12 also sends the second modulated signal to the first wireless distance finding terminal 11 and controlled
Make second timer and start timing；
The first wireless distance finding terminal 11 is also after second modulated signal is received to second modulated signal
Handled and control first timer to start timing, and sent out after completion processing to the second wireless distance finding terminal 12
Send the second response signal and control first timer to stop timing, obtain the timing time T of the first timer4；
The second wireless distance finding terminal 12 controls second timer to stop after second response signal is received
Only timing, obtains the timing time T of the second timer3；
The range cells 1 are then measured between the preceding train being located on same traffic direction and rear train according to equation below
Spacing：
D=c* (T1-T2+T3-T4)/4；Wherein d represents the spacing, and c represents the light velocity, and its concrete principle is：
T1=2T+T2, and T3=2T+T4, wherein T represents the propagation of the signal between the preceding train and the rear train
Time, therefore, T=(T1-T2+T3-T4)/4, so
D=c*T=c* (T1-T2+T3-T4)/4；
And there is frequency drift in view of the crystal oscillator in first timer and second timer, it is assumed that
The T measured1、T2、T3、T4Measured deviation be respectively λ1、λ2、λ3、λ4, due to T1And T4Obtained when being by first timer
, therefore, λ1=λ4, T2And T3Obtained when being by second timer, therefore, λ2=λ3, so
T=(T1+λ1)-(T2+λ2)+(T3+λ3)-(T4+λ4)/4=(T1-T2+T3-T4)/4；
Successively sent i.e. in the present embodiment from the first wireless distance finding terminal 11 to the second wireless distance finding terminal 12
Modulated signal and modulated signal is sent from the second wireless distance finding terminal 12 to the first wireless distance finding terminal 11, twice
The mode of measurement eliminates the asynchronous ranging influence caused of elapsed time clock of timer, and eliminates two nodal clock drifts
The ranging influence that error is caused.
In the utility model, it is preferable that first modulated signal, first response signal, second modulation
Signal, second response signal are chirp signals；The first wireless distance finding terminal 11 is whole with second wireless distance finding
Communication connection is set up between end 12, physical layer transmission signal is used as using chirp signals；The first wireless distance finding terminal 11 and
The second wireless distance finding terminal 12 may each comprise radio-frequency module and the core processing module being connected with radio-frequency module, described
Core processing module includes digital signal processing module, launch channel (being used for launching modulated signal), receives channel (for receiving
Response signal), because chirp signals are wider, the digital signal processing module is preferred to use the progress of single-bit matched filter
Matched filtering receives the signal to noise ratio of signal to improve, and replaces multiplier using adder, subtracter so that design structure is simpler
It is single, reduce the resource expended.
In the utility model, can also the tailstock of train in the rear the second wireless distance finding terminal 12 and in institute is set
The headstock for stating preceding train sets the first wireless distance finding terminal 11, so that in the case where there is many trains, each train
Relative to train above as rear train, relative to train below as preceding train, so that any phase in many trains
Ranging is can be carried out between adjacent two.
The label reader 4 is then used to obtain the label information of label and transmitted to described control unit 2, the label
It is arranged at outbound mouthful and storage mouth, it is preferable that be arranged at two bearing of trends of the facing point of outbound mouthful and storage mouth, it is described
Label is passive RFID tags, and the label information of the label storage then includes current of traffic information and forward box shape
Condition information (grade information, special health information etc.).Homonymy label redundancy is set, it is ensured that vahicles label reader 4 is reliable
Read tag information.Described control unit 2 obtains the traffic direction of train according to the label information, and the ranging is set automatically
The mode of operation of unit 1, train uses different RF spots in different traffic directions, to prevent the ranging modulated signal of adjacent line
Disturb.
Spacing between the front and rear train that described control unit 2 obtains measurement is compared with secure threshold, if necessary
(when i.e. spacing is not more than secure threshold) sends brake logic order to the braking output unit of train, is transformed into Vehicular system pair
Electrical command or the data encoding instruction answered, acoustic and light information is sent to the alarm unit 3.
In the utility model, the requirement due to wireless distance finding technology to power consumption is relatively low, and strong antijamming capability, ranging essence
Degree is high, it is adaptable to the complex route of geographical environment.Train of the present utility model follows the trail of early warning system, and there is pattern independently to know
Other function, in view of the complexity of train operation environment, the requirement of interference free performance and range accuracy to equipment is higher, and this reality
Above-mentioned requirements can then be met well by following the trail of early warning system with new train, so as to have in train collision avoidance system preferably
Development prospect.
Although the foregoing describing embodiment of the present utility model, it will be appreciated by those of skill in the art that
These are merely illustrative of, and protection domain of the present utility model is defined by the appended claims.Those skilled in the art
Member can make numerous variations or repair to these embodiments on the premise of without departing substantially from principle of the present utility model and essence
Change, but these changes and modification each fall within protection domain of the present utility model.
Claims (9)
1. a kind of train follows the trail of early warning system, it is characterised in that described including range cells, control unit and alarm unit
Range cells and the alarm unit are electrically connected with described control unit respectively；
Described control unit is used to send control instruction to the range cells, and the range cells are used to refer to receiving control
The spacing between the preceding train on same traffic direction and rear train, the control are measured by wireless distance finding mode after order
Unit is additionally operable to control the alarm unit to be alarmed according to the spacing；
The range cells include be arranged at the first wireless distance finding terminal of the headstock of the rear train and be arranged at it is described before
Second wireless distance finding terminal of the tailstock of train, the first wireless distance finding terminal includes the first timer, and described second is wireless
Distance ranging terminal includes the second timer；
The first wireless distance finding terminal is used to send the first modulated signal to the second wireless distance finding terminal and controlled described
First timer starts timing；
The second wireless distance finding terminal is used to carry out first modulated signal after first modulated signal is received
Handle and control second timer to start timing, and send first to the first wireless distance finding terminal after completion processing
Response signal simultaneously controls second timer to stop timing, obtains timing time T2；
The first wireless distance finding terminal is used to control first timer to stop after first response signal is received
Timing, obtains timing time T1；
The range cells are used to be measured between the preceding train being located on same traffic direction and rear train according to equation below
Spacing：
D=c* (T1-T2)/2；Wherein d represents the spacing, and c represents the light velocity.
2. train as claimed in claim 1 follows the trail of early warning system, it is characterised in that the second wireless distance finding terminal is additionally operable to
The second modulated signal is sent to the first wireless distance finding terminal and controls second timer to start timing；
The first wireless distance finding terminal is additionally operable to enter second modulated signal after second modulated signal is received
Row handles and controls first timer to start timing, and sends the to the second wireless distance finding terminal after completion processing
Two response signals simultaneously control first timer to stop timing, obtain timing time T4；
The second wireless distance finding terminal is used to control second timer to stop after second response signal is received
Timing, obtains timing time T3；
The range cells are used to be measured between the preceding train being located on same traffic direction and rear train according to equation below
Spacing：
D=c* (T1-T2+T3-T4)/4；Wherein d represents the spacing, and c represents the light velocity.
3. train as claimed in claim 2 follows the trail of early warning system, it is characterised in that first modulated signal, described first
Response signal, second modulated signal, second response signal are chirp signals.
4. train as claimed in claim 1 follows the trail of early warning system, it is characterised in that the train, which follows the trail of early warning system, also to be included
Label reader, the label reader is used to obtain the label information of label and transmitted to described control unit, the label
Outbound mouthful and storage mouth are arranged at, described control unit is used for the traffic direction that train is obtained according to the label information.
5. train as claimed in claim 4 follows the trail of early warning system, it is characterised in that the label is arranged at outbound mouthful and storage
The bearing of trend of the facing point of mouth.
6. train as claimed in claim 4 follows the trail of early warning system, it is characterised in that the label is passive RFID tags.
7. train as claimed in claim 4 follows the trail of early warning system, it is characterised in that the label information of the label storage includes
Current of traffic information and forward box condition information.
8. train as claimed in claim 1 follows the trail of early warning system, it is characterised in that it is described that described control unit is additionally operable to control
Alarm unit shows the spacing.
9. train as claimed in claim 1 follows the trail of early warning system, it is characterised in that the range cells also include antenna and/
Or single-bit matched filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621048616.7U CN206327390U (en) | 2016-09-08 | 2016-09-08 | Train follows the trail of early warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621048616.7U CN206327390U (en) | 2016-09-08 | 2016-09-08 | Train follows the trail of early warning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206327390U true CN206327390U (en) | 2017-07-14 |
Family
ID=59286547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621048616.7U Active CN206327390U (en) | 2016-09-08 | 2016-09-08 | Train follows the trail of early warning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206327390U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107804343A (en) * | 2016-09-08 | 2018-03-16 | 上海申通地铁集团有限公司 | Train follows the trail of early warning system |
-
2016
- 2016-09-08 CN CN201621048616.7U patent/CN206327390U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107804343A (en) * | 2016-09-08 | 2018-03-16 | 上海申通地铁集团有限公司 | Train follows the trail of early warning system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107976697B (en) | Train safety positioning method and system based on Beidou/GPS combination | |
| CN103199944B (en) | automatic dependent surveillance broadcast signal detecting method and device | |
| CN107804343A (en) | Train follows the trail of early warning system | |
| CN103293513B (en) | System and method for positioning underground coal mine staff based on RSS (received signal strength) and TOA (time of arrival) complementation | |
| WO2018152899A1 (en) | Safe and reliable method, device, and system for real-time speed measurement and continuous positioning | |
| CN102760310B (en) | DSRC (dedicated short range communication)-based vehicle positioning device, method and DSRC application system | |
| CN108146467B (en) | Precise positioning auxiliary device and method for magnetic-levitation train | |
| CN103171596B (en) | A kind of anti-collision early warning method of rail transit train | |
| CN106515790B (en) | A kind of auxiliary anti-collision early warning method based on bilateral round trip ranging | |
| CN105405307A (en) | Internet of vehicles service management system | |
| CN101797927A (en) | Non-contact rail traffic speed-measurement and positioning method based on sleeper detection and device thereof | |
| CN102358333A (en) | Wireless signal system for preventing rapid trains from tailgating | |
| CN201716869U (en) | Vehicle monitoring system, path identification card and monitoring apparatus | |
| CN103390145B (en) | A kind of target area vehicle checking method and system | |
| CN103264714A (en) | Overlap triggering method used in urban rail traffic system based on destination | |
| CN104608803A (en) | Method for measuring speed of train | |
| CN203217630U (en) | Safe driving management device of big dipper/GPS (global position system) dual-mode vehicle | |
| CN104237872B (en) | A kind of mine locomotive anti-collision method and device based on segmentation mixed ranging | |
| CN105321355A (en) | Intelligent expressway overspeed monitoring system of Internet of things | |
| CN102941865A (en) | System and method for rail train collision prevention based on wireless sensor network | |
| CN110606107A (en) | Rail vehicle anti-collision method and device based on time interval keeping | |
| CN105741365A (en) | Anti-car following disturbing transaction method, road side unit, and transaction system | |
| CN206327390U (en) | Train follows the trail of early warning system | |
| CN110674904B (en) | Train positioning system and method based on train number system | |
| CN203520451U (en) | Wharf container vehicle transport management platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |