CN106809250A - Prior-warning device, train and train groups system are followed the trail of in range finding for train - Google Patents
Prior-warning device, train and train groups system are followed the trail of in range finding for train Download PDFInfo
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- CN106809250A CN106809250A CN201510875770.5A CN201510875770A CN106809250A CN 106809250 A CN106809250 A CN 106809250A CN 201510875770 A CN201510875770 A CN 201510875770A CN 106809250 A CN106809250 A CN 106809250A
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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
- B61L23/34—Control, warnings or like safety means indicating the distance between vehicles or vehicle trains by the transmission of signals therebetween
Abstract
Prior-warning device, train and train groups system are followed the trail of the invention discloses a kind of range finding for train, prior-warning device is followed the trail of in one kind range finding, its feature is that it includes antenna, passive response unit, initiative range measurement unit, correlation calculations unit, measurement distance computing unit and control unit；Control unit is used to set the mode of operation i.e. initiative range measurement pattern and passive answer-mode of range cells；Passive response unit is received using antenna in passive answer-mode and carries the distance measuring signal of specific pseudo noise code and distance measuring signal is carried out into transfer transmission；In initiative range measurement pattern, actively transmission carries the distance measuring signal of specific pseudo noise code and receives the distance measuring signal forwarded by transfer and carry out correlation calculations acquisition phase offset compensation amount by correlation calculations unit initiative range measurement unit；Measurement distance computing unit calculates measurement distance according to phase offset compensation amount.Real time distance is carried out by pseudo noise code, range accuracy is improve, it is ensured that traffic safety.
Description
Technical field
The present invention relates to technical field of rail traffic, early warning is followed the trail of in more particularly to a kind of range finding for train
Device, train and train groups system.
Background technology
In the process of running, front and rear train must keep enough spacing distances to rail transit train, generally
Situation requirement ensures the operation safety of train whereby more than the braking distance of train.Track traffic operation control
System processed is the technical guarantee of train operating safety, the personal distance for ensureing front and rear train, prevents hair
The hazard events such as raw train from overtaking collision, the system belongs to complicated automated system.Controlled when track traffic runs
System jam processed and when stopping using, driver's pilot steering or Ren Gong lookouts is generally required to ensure row
Car safety.Train when by bend or up and down ramp, by orographic condition limited , lookout distance it is shorter,
Possibly front truck cannot be in time found, be easily caused the rear-end collision that front-and-rear vehicle distance closely triggers excessively, there is one
Fixed potential safety hazard.Additionally, dispatcher and driver get used to the automatic running of operation control system, hand
Work task training is less, is disabled when equipment breaks down, it is necessary to when hand-manipulated, often excessively nervous,
It is easily caused the careless omission of observation, it is easier to potential safety hazard occur.Therefore one kind is needed independently of train operation
Train outside control system follows the trail of prior-warning device, can in time be sent when front-and-rear vehicle distance is excessively near and warned, with
Improve travel safety.
A kind of train of the Chinese patent description of Publication No. CN102358333B follows the trail of early warning system, should
Front and rear train is respectively arranged with GPS (Global Positioning System, global positioning system) and determines in system
Position device and obtain the geographic position data of this train, then by the outside broadcast transmission of wireless transmitter,
Rear car receives the GPS geographic position datas of front truck broadcast transmission, then with itself GPS geographical position number
According to being calculated, the spacing of front and rear train is solved.The patent train location information is provided by vehicle GPS,
With certain limitation.First, gps signal cannot be received in common subterranean tunnel section and
Lose positioning function and follow the trail of early warning work function；In addition, civilian GPS location precision is generally at tens meters,
Even if being positioned using differential GPS, also it is only capable of reaching several meters, is not enough to accurately distinguish this station track and adjacent
The signal of station track, rear car is likely to be received the location information of adjacent station track train, and according to track traffic
Operation standard, the train spacing of different station tracks is usually do not have conditional, therefore the patent cannot effectively keep away
Exempt from this false alarm.
Additionally, the Chinese patent of Publication No. CN201432706Y describes a kind of train follows the trail of pre- police commissioner
Survey device, the device installs wireless encoding emitting/receiving in the train head tailstock, rear car is constantly forwards
Transmitting sequence encoded signal, current rank rear car distance is close to wireless encoding emitting/receiving and can carry out nothing
When line communicates, it becomes possible to carry out radio communication to realize following the trail of early warning.Because transmission of wireless signals is believed
Road declines and multi-path influence, and the signal intensity for receiving has randomness, thus radio communication most long distance
It is larger from fluctuating, cause the spacing fluctuation for following the trail of early warning larger, there is uncertainty.Handed in city rail
Logical field, train braking distance is no more than 200 meters, therefore the spacing of train tracking early warning is shorter, only
100 meters, at this in rank, the communication distance of wireless encoding emitting/receiving is more difficult to accurately
Define.
The content of the invention
The technical problem to be solved in the present invention be in order to overcome positioning precision between train in the prior art it is poor,
Exist between the train of adjacent station track signal receive by mistake it is relatively low with security caused by false alarm and by adopting
With the distance between signal intensity calculating train because the difference of environment makes signal intensity produce uncertainty to lead
Cause the defect that cannot determine of safe class, there is provided a kind of range accuracy is high, the row that make between adjacent station track
Prior-warning device, train and train groups system are followed the trail of in the glitch-free range finding for train of car.
The present invention is to solve above-mentioned technical problem by following technical proposals；
Prior-warning device is followed the trail of in a kind of range finding for train, it is characterised in that it includes antenna, passively should
Answer unit, initiative range measurement unit, correlation calculations unit, measurement distance computing unit and control unit；
Described control unit is used to that mode of operation to be provided and selected, and the mode of operation includes initiative range measurement mould
Formula and passive answer-mode；
The passive response unit is used to carry spy using antenna reception in passive answer-mode
Determine the distance measuring signal of pseudo noise code and the distance measuring signal is carried out into transfer transmission；
The initiative range measurement unit is used to actively send carrying using the antenna in initiative range measurement pattern
There is the distance measuring signal of specific pseudo noise code and receive the distance measuring signal forwarded by transfer；
The correlation calculations unit is used for the specific pseudo noise code carried to the distance measuring signal that active sends
Correlation calculations are carried out with the specific pseudo noise code for receiving the distance measuring signal carrying forwarded by transfer
Obtain phase offset compensation amount；
The measurement distance computing unit is used to calculate measurement distance according to the phase offset compensation amount.
In this programme, by measuring what is followed the trail of the prior-warning device local specific pseudo noise code for sending and receive
The phase offset compensation amount that correlation calculations between pseudo noise code are obtained calculates the spacer between train
From, the phase offset compensation amount be distance measuring signal from the transmission time for being sent to reception, by distance measuring signal
In pseudo noise code realize distance measurement function, improve the adaptability of range accuracy and train operation environment, protect
The operation safety of train is demonstrate,proved.
It is preferred that prior-warning device is followed the trail of in the range finding also includes parameter input unit；
The parameter input unit is used to obtain current of traffic, and the current of traffic includes up
Direction and down direction；
Described control unit is additionally operable to set working frequency points according to the current of traffic, and in the row
The working frequency points are set to first group of frequency by car traffic direction when being up direction, and in the row
The working frequency points are set to second group of frequency by car traffic direction when being down direction.
It is preferred that first group of frequency includes the first frequency and the second frequency, second group of frequency bag
Include the 3rd frequency and the 4th frequency；
The passive response unit is used for when the current of traffic is up direction to distance measuring signal
Received using first frequency and be transmitted using second frequency, and in the row
Car traffic direction is received and used to distance measuring signal when being down direction using the 3rd frequency
4th frequency is transmitted；
The initiative range measurement unit is used for when the current of traffic is up direction to distance measuring signal
It is transmitted using second frequency and is received using first frequency, and in the row
Car traffic direction is transmitted and is used to distance measuring signal when being down direction using the 4th frequency
3rd frequency is received.
In this programme, different working frequency points are determined by according to current of traffic, it is ensured that with one
Wireless distance finding can be just carried out between the train of the same traffic direction in road, the interference for closing on station track train is eliminated,
The accuracy of wireless distance finding is ensure that, the security of train operation is further ensured.
It is preferred that the measurement distance computing unit is inclined for the multiple phases according to periodically continued acquisition
Move compensation rate and calculate corresponding multiple measurement distances, and average survey is calculated according to the multiple measurement distance
Span is from and by the average measurement Distance Transmission to described control unit.
In this programme, take multiple measurements and be averaged in specific period by train detection distance
Value, reduces measurement error, further increases range accuracy and further increases train operation
Security.
It is preferred that the antenna is the directional aerial with particular angle of radiation.
In this programme, due to directional aerial main lobe direction point to current of traffic front and after
Side, the interference of the radio communication in non-ranging direction can be effectively suppressed by the directional aerial, and strengthen survey
The signal to noise ratio of the reception signal away from direction, further increases the transmitting-receiving effect of wireless distance finding signal, it is ensured that
Wireless distance finding communication reliability is carried out between train, the security of train operation is further ensured.
It is preferred that prior-warning device is followed the trail of in the range finding also to include warning unit, it is described warn unit with it is described
Control unit is electrically connected；
The unit of warning is for showing the measurement distance and alert messages；
Described control unit is additionally operable to control institute when the measurement distance is less than the first predeterminable range thresholding
State unit output alert messages of warning.
It is preferred that the unit of warning is including display module and alarm module, the display module include with
One of lower or its any combination：Liquid crystal display, charactron, indicator lamp；
The alarm module includes one below or its any combination：Buzzer, speech player.
In this programme, the train driver is reminded to note vehicular gap by unit of warning, prevention is chased after
Tail accident, improves traffic safety.
It is preferred that prior-warning device is followed the trail of in the range finding also includes braking output unit, the braking output is single
Unit electrically connects with described control unit；
Described control unit is additionally operable to send system when the measurement distance is less than the second predeterminable range thresholding
Dynamic logical order to the braking output unit, wherein, the second predeterminable range thresholding is less than described the
One predeterminable range thresholding；
It is described braking output unit be used for by receive the brake logic order be transformed into electrical command or
Data encoding instruction is braked to train.
In this programme, when the distance between measurement train is less than the second predeterminable range thresholding, train is entered
Row Braking mode, multilevel security mechanism is carried out by train, improves the travel safety of train.
Present invention also offers a kind of train, including headstock and the tailstock, its feature is, the headstock and
The tailstock is mounted on the range finding for train and follows the trail of prior-warning device.
Present invention also offers a kind of train groups system, its feature is that the train groups system is at least wrapped
A front car and rear car and two running tracks are included, the front truck or the rear car are the train, described
Two running tracks are respectively uplink path and downing track, and the uplink path is the train in train
Running track when traffic direction is up direction, the downing track is to be in the current of traffic
Running track during down direction；
Prior-warning device is followed the trail of in the range finding of the rear car front is used for train in the uplink path with first
Group frequency follows the trail of prior-warning device and carries out Full-duplex wireless communications, and train with the range finding of the front truck tailstock
Following the trail of prior-warning device with the range finding of the front truck tailstock with second group of frequency in the downing track is carried out
Full-duplex wireless communications；
Wherein, first group of frequency includes the first frequency and the second frequency, and second group of frequency includes
3rd frequency and the 4th frequency.
In this programme, up direction rear car when being found range to front truck using the first frequency receive and
Second frequency sending signal, and received and the 4th frequency transmission letter using the 3rd frequency in down direction
Number, carried out wirelessly using different frequencies when different tracks are different traffic directions operations by train
Range finding, it is to avoid interfering for the wireless distance finding signal of the train between adjacent orbit, improves wireless
The accuracy of range finding, further increases the security of train operation.
Positive effect of the invention is：Rear car is wirelessly surveyed to front truck when improve train operation
Away from range accuracy and accuracy, prevent train between wireless distance finding signal interference, improve train
Operation safe class and reliability.
Brief description of the drawings
Fig. 1 follows the trail of the structural representation of prior-warning device for the range finding for train of the embodiment of the present invention 1.
Fig. 2 follows the trail of the structural representation of prior-warning device for the range finding for train of the embodiment of the present invention 3.
Fig. 3 is wireless distance finding between the train when current of traffic of the embodiment of the present invention 4 is up direction
Principle schematic.
Fig. 4 is wireless distance finding between the train when current of traffic of the embodiment of the present invention 4 is down direction
Principle schematic.
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but is not therefore limited the present invention to
Among described scope of embodiments.
Embodiment 1
As shown in figure 1, prior-warning device is followed the trail of in a kind of range finding for train, it includes antenna 101, quilt
Dynamic response unit 102, initiative range measurement unit 103, control unit 104, correlation calculations unit 105,
Measurement distance computing unit 106, warn unit 107 and braking output unit 108.Passive response unit
102nd, initiative range measurement unit 103 is electrically connected with antenna 101, passive response unit 102, initiative range measurement
Unit 103, correlation calculations unit 105, measurement distance computing unit 106, unit 107 of warning, system
Dynamic output unit 108 is electrically connected with control unit 104, correlation calculations unit 105 and measurement distance
Computing unit 106 is electrically connected.
Antenna 101 is the directional aerial with particular angle of radiation, and the radiation gain maximum of antenna 101 is just
To current of traffic, antenna 101 can significantly increase the wireless survey in range finding direction in emission state
Away from the signal intensity of signal, weaken the radiation interference in other directions, antenna 101 can change in reception state
The snr of received signal in kind range finding direction, suppresses the signal interference in other directions, and row are decreased in addition
Absorption and reflection of the car metal car body to wireless signal, obtain preferably transmitting-receiving effect.
Control unit 104 is used to that the mode of operation that prior-warning device is followed the trail of in the range finding to be provided and selected, described
Mode of operation is active distance measurement mode and passive answer-mode, so as to realize full-duplex communication.
Passive response unit 102 is used to be carried using the reception of the antenna 101 in passive answer-mode
The distance measuring signal is simultaneously carried out transfer transmission by the distance measuring signal of specific pseudo noise code.Passive response unit
102 the distance measuring signal is carried out transfer forward when only be merely docking receive distance measuring signal it is simple
Replicate or strengthen, and do not increase other information, can both use modulated without demodulation in forwarding
The direct forwarding of journey, it would however also be possible to employ despreading, filtering, amplification, the regenerative forwarding of band spectrum modulation.
Initiative range measurement unit 103 is used to be carried using the transmission of the antenna 101 in initiative range measurement pattern
The distance measuring signal that the distance measuring signal of specific pseudo noise code and reception are forwarded by transfer.
Correlation calculations unit 105 be used for active send distance measuring signal carry specific pseudo noise code and
Reception carries out correlation calculations and obtains by the specific pseudo noise code that the distance measuring signal that transfer is forwarded is carried
Take phase offset compensation amount.
In this programme, initiative range measurement unit 103 actively sends the range finding letter for carrying specific pseudo noise code
Number, the specific pseudo noise code is the local pseudo noise code with certain length and code check, the initiative range measurement
Unit 103 receive the distance measuring signal that is forwarded by transfer and carry out down coversion and demodulation is obtained it is pseudo- with
Machine code is reception pseudo noise code.The distance measuring signal that is actively sent due to initiative range measurement unit 103 and receive
The distance measuring signal forwarded by transfer between there is certain transmission delay, and therein described receive pseudo-
Random code also only exists certain phase difference with the local pseudo noise code, the phase difference and distance measuring signal
Transmission delay it is identical, therefore the distance between can be calculated with measurand by calculating phase difference.
And carrying out correlation operation with local pseudo noise code by the reception pseudo noise code can obtain the phase
Difference, the phase difference is the phase offset compensation amount, and the correlation operation is computing cross-correlation.
Measurement distance computing unit 106 is used to calculate measurement distance according to the phase offset compensation amount.Tool
Body calculating process is as follows：
The phase offset compensation amount t is obtained by correlation calculations unit 105, and wireless distance finding is believed
Number aerial transmission speed c is, it is known that measurement distance L can be calculated according to below equation：
L=(t × c) ÷ 2
Measurement distance computing unit 106 calculates the measurement distance L that will be calculated and is sent to control unit
104。
Unit 107 of warning is used for display distance and alert messages.Unit 107 of warning includes display module
1071 and alarm module 1072, display module 1071 can be liquid crystal display, charactron, indicator lamp
In one or more, alarm module 1072 can be buzzer, speech player in one kind or two
Kind.Redundancy is constituted using two kinds of type of alarms of acousto-optic, when one of which equipment failure, as long as another
Equipment of warning does not fail simultaneously, then unit 107 of warning remains to maintain alarm function, improves alarm function
Reliability.
Braking output unit 108 is used to for the logical order of reception to be transformed into electrical command or data encoding
Instruction is braked to train.
In this programme, the specific works engineering that prior-warning device is followed the trail of in range finding is as follows：
When the mode of operation that control unit 104 is provided and selected is passive answer-mode.Passive response list
Unit 102 is received by antenna 101 and carries the sequencing signal of specific pseudo noise code and by the distance measuring signal
Carry out transfer transmission.
When the mode of operation that control unit 104 is provided and selected is active distance measurement mode.
Initiative range measurement unit 103 actively sends the range finding letter for carrying specific pseudo noise code by antenna 101
Number and receive by transfer forward the distance measuring signal.
What the distance measuring signal that correlation calculations unit 105 actively sends according to initiative range measurement unit 103 was carried
Local pseudo noise code and reception carry out phase by the reception pseudo noise code that the distance measuring signal that transfer is forwarded is carried
Closing property is calculated and obtains phase offset compensation amount.
Measurement distance computing unit 106 calculates the range finding and follows the trail of early warning dress by the phase offset compensation amount
Put with the distance between tested train i.e. measurement distance, and the measurement distance is sent to control unit
104。
Whether control unit 104 judges the measurement distance less than the first predeterminable range thresholding, if so, control
Alarm module processed 1072 exports warning message, if it is not, only showing the measurement by display module 1071
Distance；Additionally, control unit 104 is additionally operable to determine whether whether the measurement distance is pre- less than second
If distance threshold, if so, described control unit 104 sends brake logic order to the braking output list
The brake logic order of reception is converted into electrical command or number by unit 108, the braking output unit 108
Train is braked according to coded command, wherein the second predeterminable range thresholding is preset less than described first
Distance threshold, if it is not, then only being shown or being alarmed by unit 107 of warning.Wherein, it is described electric
Refer to electric utility master die analog quantity signal, the data encoding refers to digitally encoded signal.
Contrasted from different predeterminable range thresholdings by the different measurement distance obtained according to measurement
Different control commands are realized in judgement, improve the security of train operation.
The present embodiment is by the directional aerial with particular angle of radiation and the side using pseudo-random code ranging
Method, improves the adaptability of range accuracy and train operation environment, it is ensured that the operation safety of train.
The present embodiment additionally provides a kind of train, and the train includes headstock and the tailstock, the headstock and car
Prior-warning device is followed the trail of in the range finding for train that tail is mounted on as set forth in the present embodiment.
Embodiment 2
The present embodiment has done further improvement on the basis of embodiment 1, thes improvement is that：It is described
Measurement distance computing unit 106 is used to calculate correspondence according to multiple phase pushing figures of periodically continued acquisition
Multiple measurement distances, and according to the multiple measurement distance calculate average measurement distance and will it is described put down
Equal measurement distance is transferred to described control unit 104.
Because wireless distance finding signal is easily subject to the influence such as multi-path jamming, decline in transmitting procedure, cause
The random fluctuation of the amplitude of the distance measuring signal for receiving has influence on the precision of measurement distance, therefore, by adopting
Periodically continued measurement is used, and multiple measurement distances that continuous several times are measured are taken into average, it will be averaged
The measurement distance for obtaining afterwards is preserved as end product, can effectively reduce measurement error, improves the survey
Away from the certainty of measurement for following the trail of prior-warning device.
Additionally, having periodic feature according to pseudo noise code, initiative range measurement unit 103 is received every time
The complete pseudo noise code of one frame, it is described receive pseudo noise code carried out to the local pseudo noise code it is once related
Property computing obtains a data for transmission delay.Because the transmission speed of wireless distance finding signal is far longer than row
The actual travel speed of car, the pseudo noise code cycle used by initiative range measurement unit 103 is very short, completes once
2ms is less than or equal to the time required to range finding；If train speed takes 350km/h=0.097m/ms, once
In ranging process, 0.097 × 2=0.194m of train operation, the range error requirement relative to tens of meters,
Its influence can be ignored, therefore can be approximately considered in ranging process, and train remains static,
Continuous several times wireless distance finding can in a short time be carried out.
The present embodiment additionally provides a kind of train, and the train includes headstock and the tailstock, the headstock and car
Prior-warning device is followed the trail of in the range finding for train that tail is mounted on as set forth in the present embodiment.
Embodiment 3
The present embodiment has made further improvement on the basis of embodiment 2, as shown in Fig. 2 improving it
Place is：Prior-warning device is followed the trail of in the range finding also includes parameter input unit 109, and the parameter input is single
Unit 109 is used to obtain current of traffic, and the current of traffic includes up direction and down direction；
Described control unit 104 is additionally operable to set working frequency points according to the current of traffic, and in the row
Working frequency points are set to first group of frequency when car traffic direction is up direction, and in train fortune
The working frequency points are set to second group of frequency by line direction when being down direction.
First group of frequency includes the first frequency and the second frequency, and second group of frequency includes the 3rd frequency
Point and the 4th frequency；
The passive response unit 102 is used to believe range finding when the current of traffic is up direction
Number use first frequency is received and is transmitted using second frequency, and described
Current of traffic is received and adopted to distance measuring signal when being down direction using the 3rd frequency
It is transmitted with the 4th frequency；
The initiative range measurement unit 103 is used to believe range finding when the current of traffic is up direction
Number use second frequency is transmitted and is received using first frequency, and described
Current of traffic is transmitted and is adopted to distance measuring signal when being down direction using the 4th frequency
Received with the 3rd frequency.
Determine different working frequency points by according to current of traffic, it is ensured that the same same operation side in station track
To train between can just carry out wireless distance finding, eliminate the interference for closing on station track train, it is ensured that wireless
The accuracy of range finding, further ensures the security of train operation.
The present embodiment additionally provides a kind of train, and the train includes headstock and the tailstock, the headstock and car
Prior-warning device is followed the trail of in the range finding for train that tail is mounted on as set forth in the present embodiment.
Embodiment 4
A kind of train groups system, it at least includes a front car and rear car and two running tracks, the front truck
Or the rear car is train as described in example 3 above, two running tracks of the train are respectively
Row track and downing track, the uplink path are that the train is up direction in current of traffic
Running track, the downing track is the running track when current of traffic is down direction；
The range finding of the rear car front follow the trail of prior-warning device be used for train in uplink path with first group frequently
Point follows the trail of prior-warning device and carries out Full-duplex wireless communications with the range finding of the front truck tailstock, and train is under
During row track with the range finding of second group of frequency and the front truck tailstock follow the trail of prior-warning device carry out full duplex without
Line communicates；
Wherein, first group of frequency includes the first frequency and the second frequency, and second group of frequency includes
3rd frequency and the 4th frequency.
Schematic diagram when current vehicle runs on uplink path with rear car is as shown in Figure 3.Rear car is carried out to front truck
The detailed process that early warning is followed the trail of in range finding is as follows：
The front truck is the second train 2, and second train 2 includes that prior-warning device 21 is followed the trail of in the first range finding
Prior-warning device 22 is followed the trail of with the second range finding, the rear car is the first train 1, and first train 1 includes
3rd range finding is followed the trail of the range finding of prior-warning device 11 and the 4th and follows the trail of prior-warning device 12.Wherein, rear car front
It is that prior-warning device 12 is followed the trail of in the 4th range finding that prior-warning device is followed the trail of in range finding, and early warning dress is followed the trail of in the range finding of the front truck tailstock
It is set to the first range finding and follows the trail of prior-warning device 21.
First range finding is followed the trail of prior-warning device 21 and is entered with first group of frequency with the 4th range finding tracking prior-warning device 12
Row Full-duplex wireless communications.Now, the 4th range finding is followed the trail of prior-warning device 12 and works in initiative range measurement pattern,
First range finding is followed the trail of prior-warning device 21 and works in passive answer-mode, and prior-warning device 12 is followed the trail of in the 4th range finding
The wireless distance finding signal for carrying local pseudo noise code is actively sent with the second frequency to the first range finding tracking
Prior-warning device 21, the first range finding is followed the trail of 21 pairs of distance measuring signals of prior-warning device and is carried out using the first frequency
Receive and the distance measuring signal transfer is transmitted to by the 4th range finding with the second frequency and follow the trail of prior-warning device
12, the 4th range finding is followed the trail of prior-warning device 12 and the range finding for carrying reception pseudo noise code is received with the first frequency
Signal.4th range finding follows the trail of prior-warning device 12 according to the local pseudo noise code and the reception pseudorandom
Code is calculated the distance between rear car and front truck, so as to realize warning or the instruction such as control for brake for rear car
Action.
Schematic diagram when current vehicle runs on downing track with rear car is as shown in Figure 4.Rear car is carried out to front truck
The detailed process that early warning is followed the trail of in range finding is as follows：
The front truck is the first train 1, and first train 1 includes that prior-warning device 11 is followed the trail of in the 3rd range finding
Prior-warning device 12 is followed the trail of with the 4th range finding, the rear car is the second train 2, and second train 2 includes
First range finding is followed the trail of prior-warning device 21 and second and follows the trail of prior-warning device 22.Wherein, the range finding of rear car front
It is that prior-warning device 21 is followed the trail of in the first range finding to follow the trail of prior-warning device, and the range finding of the front truck tailstock is followed the trail of prior-warning device and is
Prior-warning device 12 is followed the trail of in 4th range finding.
First range finding is followed the trail of prior-warning device 21 and is entered with second group of frequency with the 4th range finding tracking prior-warning device 12
Row Full-duplex wireless communications.Now, the 4th range finding is followed the trail of prior-warning device 12 and works in passive answer-mode,
First range finding is followed the trail of prior-warning device 21 and works in initiative range measurement pattern, and prior-warning device 21 is followed the trail of in the first range finding
The wireless distance finding signal for carrying local pseudo noise code is actively sent with the 4th frequency to the 4th range finding tracking
Prior-warning device 12, the 4th range finding is followed the trail of 12 pairs of distance measuring signals of prior-warning device and is carried out using the 3rd frequency
Receive and the distance measuring signal transfer is transmitted to by first range finding with the 4th frequency and follow the trail of prior-warning device
21, the first range finding is followed the trail of prior-warning device 21 and the range finding for carrying reception pseudo noise code is received with the 3rd frequency
Signal.First range finding follows the trail of prior-warning device 21 according to the local pseudo noise code and the reception pseudorandom
Code is calculated the distance between rear car and front truck, so as to realize warning or the instruction such as control for brake for rear car
Action.
In this programme, the setting of current of traffic and working frequency points is not limited to the above, can be with
Selected according to actual conditions, no longer repeated one by one here.
In the present embodiment, in up direction, rear car uses the first frequency when being found range to front truck
Receive and the second frequency sending signal, and received and the 4th frequency using the 3rd frequency in down direction
Sending signal, is entered when different tracks are different traffic directions operations by train using different frequencies
Row wireless distance finding, it is to avoid interfering for the wireless distance finding signal of the train between adjacent orbit, improves
The accuracy of wireless distance finding, further increases the security of train operation.
Although the foregoing describing specific embodiment of the invention, those skilled in the art should manage
Solution, these are merely illustrative of, and protection scope of the present invention is defined by the appended claims.This
The technical staff in field, can be to these embodiment party on the premise of without departing substantially from principle of the invention and essence
Formula makes various changes or modifications, but these changes and modification each fall within protection scope of the present invention.
Claims (10)
1. prior-warning device is followed the trail of in a kind of range finding for train, it is characterised in that it includes antenna, quilt
Dynamic response unit, initiative range measurement unit, correlation calculations unit, measurement distance computing unit and control are single
Unit；
Described control unit is used to that mode of operation to be provided and selected, and the mode of operation includes initiative range measurement mould
Formula and passive answer-mode；
The passive response unit is used to carry spy using antenna reception in passive answer-mode
Determine the distance measuring signal of pseudo noise code and the distance measuring signal is carried out into transfer transmission；
The initiative range measurement unit is used to actively send carrying using the antenna in initiative range measurement pattern
There is the distance measuring signal of specific pseudo noise code and receive the distance measuring signal forwarded by transfer；
The correlation calculations unit is used for the specific pseudo noise code carried to the distance measuring signal that active sends
Correlation calculations are carried out with the specific pseudo noise code for receiving the distance measuring signal carrying forwarded by transfer
Obtain phase offset compensation amount；
The measurement distance computing unit is used to calculate measurement distance according to the phase offset compensation amount.
2. prior-warning device is followed the trail of in the range finding for being used for train as claimed in claim 1, it is characterised in that
Prior-warning device is followed the trail of in the range finding also includes parameter input unit；
The parameter input unit is used to obtain current of traffic, and the current of traffic includes up
Direction and down direction；
Described control unit is additionally operable to set working frequency points according to the current of traffic, and in the row
The working frequency points are set to first group of frequency by car traffic direction when being up direction, and in the row
The working frequency points are set to second group of frequency by car traffic direction when being down direction.
3. prior-warning device is followed the trail of in the range finding for being used for train as claimed in claim 2, it is characterised in that
First group of frequency include the first frequency and the second frequency, second group of frequency include the 3rd frequency and
4th frequency；
The passive response unit is used for when the current of traffic is up direction to distance measuring signal
Received using first frequency and be transmitted using second frequency, and in the row
Car traffic direction is received and used to distance measuring signal when being down direction using the 3rd frequency
4th frequency is transmitted；
The initiative range measurement unit is used for when the current of traffic is up direction to distance measuring signal
It is transmitted using second frequency and is received using first frequency, and in the row
Car traffic direction is transmitted and is used to distance measuring signal when being down direction using the 4th frequency
3rd frequency is received.
4. prior-warning device is followed the trail of in the range finding for being used for train as claimed in claim 1, it is characterised in that
The measurement distance computing unit is used for the multiple phase offset compensation gauge according to periodically continued acquisition
Corresponding multiple measurement distances are calculated, and average measurement distance is calculated according to the multiple measurement distance and is incited somebody to action
The average measurement Distance Transmission is to described control unit.
5. prior-warning device is followed the trail of in the range finding for being used for train as claimed in claim 1, it is characterised in that
The antenna is the directional aerial with particular angle of radiation.
6. prior-warning device is followed the trail of in the range finding for being used for train as claimed in claim 1, it is characterised in that
Prior-warning device is followed the trail of in the range finding also includes unit of warning, and the unit of warning is electrically connected with described control unit
Connect；
The unit of warning is for showing the measurement distance and alert messages；
Described control unit is additionally operable to control institute when the measurement distance is less than the first predeterminable range thresholding
State unit output alert messages of warning.
7. prior-warning device is followed the trail of in the range finding for being used for train as claimed in claim 6, it is characterised in that
Prior-warning device is followed the trail of in the range finding also includes braking output unit, the braking output unit and the control
Unit is electrically connected；
Described control unit is additionally operable to send system when the measurement distance is less than the second predeterminable range thresholding
Dynamic logical order to the braking output unit, wherein, the second predeterminable range thresholding is less than described the
One predeterminable range thresholding；
It is described braking output unit be used for by receive the brake logic order be transformed into electrical command or
Data encoding instruction is braked to train.
8. prior-warning device is followed the trail of in the range finding for being used for train as claimed in claim 6, it is characterised in that
The unit of warning including display module and alarm module, the display module include one below or its
Meaning combination：Liquid crystal display, charactron, indicator lamp；
The alarm module includes one below or its any combination：Buzzer, speech player.
9. a kind of train, including headstock and the tailstock, it is characterised in that the headstock and the tailstock are equal
Install and follow the trail of prior-warning device just like the range finding for train described in claim 1 to 8 any one.
10. a kind of train groups system, it is characterised in that the train groups system at least include a front truck with
Rear car and two running tracks, the front truck or the rear car are train as claimed in claim 9,
Described two running tracks are respectively uplink path and downing track, and the uplink path exists for the train
Running track when current of traffic is up direction, the downing track is in the train operation side
Running track during to for down direction；
Prior-warning device is followed the trail of in the range finding of the rear car front is used for train in the uplink path with first
Group frequency follows the trail of prior-warning device and carries out Full-duplex wireless communications, and train with the range finding of the front truck tailstock
Following the trail of prior-warning device with the range finding of the front truck tailstock with second group of frequency in the downing track is carried out
Full-duplex wireless communications；
Wherein, first group of frequency includes the first frequency and the second frequency, and second group of frequency includes
3rd frequency and the 4th frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875770.5A CN106809250A (en) | 2015-12-02 | 2015-12-02 | Prior-warning device, train and train groups system are followed the trail of in range finding for train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875770.5A CN106809250A (en) | 2015-12-02 | 2015-12-02 | Prior-warning device, train and train groups system are followed the trail of in range finding for train |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106809250A true CN106809250A (en) | 2017-06-09 |
Family
ID=59106533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510875770.5A Pending CN106809250A (en) | 2015-12-02 | 2015-12-02 | Prior-warning device, train and train groups system are followed the trail of in range finding for train |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106809250A (en) |
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