CN107222329A - The vehicle-mounted broadcast system master control hot spare method of subway - Google Patents
The vehicle-mounted broadcast system master control hot spare method of subway Download PDFInfo
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- CN107222329A CN107222329A CN201710280988.5A CN201710280988A CN107222329A CN 107222329 A CN107222329 A CN 107222329A CN 201710280988 A CN201710280988 A CN 201710280988A CN 107222329 A CN107222329 A CN 107222329A
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000004044 response Effects 0.000 claims abstract description 30
- 230000008859 change Effects 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims description 59
- 230000002159 abnormal effect Effects 0.000 claims description 18
- 230000004913 activation Effects 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
- H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
- H04H20/62—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast for transportation systems, e.g. in vehicles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40293—Bus for use in transportation systems the transportation system being a train
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Small-Scale Networks (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The present invention relates to a kind of vehicle-mounted broadcast system master control hot spare method of subway, including master-slave switching method and principal and subordinate's method of work；Master-slave switching method is：Default priority rule；According to the threshold time of setting, controller is judged state change condition, and combines priority rule, to decide whether to change its mode of operation；Principal and subordinate's method of work is：Controller scheduling train controlling bus and/or internal bus sending point name data frame, control data frame, oneself state data frame under main mode of operation, in data syn-chronization is realized from the controller under mode of operation by control data frame, called the roll from controller/compartment controller under mode of operation by send oneself state data frame as acknowledgement frame response be in main mode of operation under controller.The method of the present invention can realize automatic switchover mode of operation, system automation level be improved, while two controllers can realize data syn-chronization, it is to avoid cause control after switching the problem of broadcast message is misrepresented deliberately occur.
Description
Technical field
It is applied in the vehicle-mounted broadcast system of subway carry out two controller hot standby method the present invention relates to a kind of.
Background technology
The topological structure of the vehicle-mounted broadcast system of subway on subway train as shown in Figure 1, headstock, the tailstock of subway train
Respectively there is the control respectively in a drivers' cab, each drivers' cab with a set of Broadcasting Control main frame, the i.e. vehicle-mounted broadcast system of subway
Device, the controller is responsible for the site contents of voice of calling out the stops, urgent broadcast, special Broadcasting Control and the dynamic map screen of broadcast system
Update, the notice of LCD screen display content updates.The main external interface of each controller is total with the Train Control of subway train
A interfaces, internal bus (CAN, the RS485 with broadcast system of line (frequently with RS485 buses, electric current loop or MVB) connection
Bus or network) C interface being connected and the B interface being connected with storage device.A interfaces are responsible for receiving from signal system
Information, the information of train network, the operational order for receiving driver, come perform call out the stops, promptly prompting, special broadcast, malfunction coefficient
Etc. function, while the status information inside broadcast system, fault information reporting to train network system.B interface is responsible for storage
The system configuration information of broadcast system, voice document of calling out the stops, emergency speech file, site information, specific human voices file and daily record
File.C interface is responsible for each compartment controller into broadcast system, dynamic map, LCD screen and sends broadcasting handover information, stands
Point shows fresh information.The communications status of A interface faults, i.e. controller and Train Control bus is abnormal, the failure that can cause to call out the stops,
Website shows that failure uploads failure, state and uploads failure.The communications status of B interface failure, i.e. controller and storage device
Abnormal, the voiceless sound that can cause to call out the stops, urgent broadcast voiceless sound, noiseless special broadcast, website error, broadcast system are configured
It is wrong.The running log of broadcast system can not be recorded.The communications status of C interface failure, i.e. controller and internal bus is abnormal, can lead
Cause that the machine operation in each compartment can not be monitored, the content of dynamic map can not be updated.
In the work of above-mentioned subway vehicle-mounted broadcast system, it is necessary to which a controller is placed in into main mode of operation, and another
Controller is placed in from mode of operation.Controller under main mode of operation undertakes the function of controlling bus scheduling and can send correlation
Information is controlled to broadcast system.In the prior art frequently with the mode of operation of manual type switch controller, add
The workload of related personnel and can not in time it be switched over according to system mode.Meanwhile, the information of two controllers is often not
It is synchronous so that easily to occur broadcast message after switching working mode and misrepresent deliberately to wait extremely.
The content of the invention
It is an object of the invention to provide it is a kind of being capable of the control of automatically switching according to the working condition of subway vehicle-mounted broadcasting system
The mode of operation of device processed, so as to improve system automation level, reduces the degree of dependence to personnel, reduces local fault or single-ended
Influence of the failure to broadcast system, improves the vehicle-mounted broadcast system master control hot spare method of subway of the natural rate of interest of broadcast system work.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：
A kind of vehicle-mounted broadcast system master control hot spare method of subway, applied in the vehicle-mounted broadcast system of subway on subway train, with
Realize that two controllers for being divided into the vehicle-mounted broadcast system of the subway of its headstock and the tailstock are hot standby each other, each controller leads to
A interfaces are crossed to communicate, communicate by the corresponding storage device of B interface with the Train Control bus on the subway train
Believe, communicated by the internal bus of C interface and the vehicle-mounted broadcast system of the subway；Positioned at two controls of headstock and the tailstock
Device processed has different address codes in the vehicle-mounted broadcast system of subway；
The vehicle-mounted broadcast system master control hot spare method of subway includes master-slave switching method and principal and subordinate's method of work；
The master-slave switching method is used to determining the mode of operation of the controller, the mode of operation include main mode of operation and
From mode of operation；
The master-slave switching method is：The default priority rule based on controller address code, subway train key state of activation change
Become switching principle, the principle of A interface faults detection switching, the principle of B interface fault detect switching, C interface fault detect switching
Principle；
It is described based on controller address code priority rule be：The controller with small address code enters the main Working mould
Formula, the controller with big address code enter described from mode of operation or the controller with big address code enters institute
State main mode of operation, the controller with small address code and enter described from mode of operation；The subway train key activation
State change switching principle is：The controller at end enters the main mode of operation, institute where the key of the subway train
State the controller of the key of subway train not at end and enter described from mode of operation；The A interface faults detection switching
Principle is：When the A interfaces of controller described in one end are normal and the other end described in controller A interface communication failures when, then normally
The controller of one end enters the main mode of operation, and the controller of failure one end enters described from mode of operation；Institute
State B interface fault detect switching principle be：When controller described in one end B interface failure and the other end described in controller B
When interface is normal, then the controller of failure one end enters described from mode of operation, and the controller of normal one end enters
The main mode of operation；
The time gate limit value for judging C interface physical layer failure is set to the controller with big address code for LIMIT11, it is right
The controller with small address code sets the time gate limit value for judging C interface physical layer failure for LIMIT12, LIMIT11
≠LIMIT12；The time gate limit value of C interface protocol layer failure, which is, to be judged to the controller setting with big address code
LIMIT21, judges that the time gate limit value of C interface protocol layer failure is to the controller setting with small address code
LIMIT22, LIMIT21 ≠ LIMIT22；
During the vehicle-mounted broadcast system initial power-on of the subway, the controller is according to the preferential rule based on controller address code
Then enter the main mode of operation or described from mode of operation；The controller is judged state change condition, with certainly
Fixed whether to change its mode of operation, the state change condition includes the controller and the controlling bus Train Control bus
Between the communications status of the B interface between the communications status of the A interfaces, the controller and the storage device, described
The communications status of the C interface, subway train key activated end state four between controller and the internal bus：Work as items
The communications status is normal and the subway train on when not accessing key, the controller keeps its mode of operation constant；
When every communications status is normal and the subway train on access key when, the controller is according to the subway train
Key state of activation changes switching principle and enters the main mode of operation or described from mode of operation；When the state changes bar
When the communications status of the A interfaces is abnormal between controller described in part and the controlling bus Train Control bus, the control
Device processed detects the principle of switching according to the A interface faults and enters the main mode of operation or described from mode of operation；Work as institute
When stating the communications status exception of the B interface between controller and the storage device described in state change condition, the control
Device processed enters the main mode of operation or described from mode of operation according to the principle that the B interface fault detect switches；Work as institute
When stating the communications status exception of the C interface between controller and the internal bus described in state change condition, the control
The principle that device processed switches according to the C interface fault detect is operated pattern switching, if in the control from mode of operation
Device processed judges the time gate limit value of C interface physical layer failure based on it and judges its physical layer with the internal bus communications
When occurring abnormal, it is main mode of operation that should be in from the controller replacing of mode of operation；If the institute in main mode of operation
Controller is stated to judge the time gate limit value of C interface protocol layer failure based on it and judge itself and the controlling bus Train Control
The physical layer of bus communication is normal and during protocol layer failure, should be replaced by described controller of main mode of operation from Working mould
Formula；
Priority of the priority of switching working mode higher than the switching working mode because of key state of activation because of interface fault；
Principal and subordinate's method of work, which is used to realize, enters the main mode of operation or the controller from mode of operation
Work；
Principal and subordinate's method of work is：The controller under the main mode of operation dispatch the Train Control bus/
Or the internal bus sending point name data frame, control data frame and/or oneself state data frame, so as to realize the subway
Carry the broadcasted content control of broadcast system and start the control stopped, the content-control that dynamic map is shown, in the display of LCD screen
Hold control, the roll-call data frame packet specifies being in for loopback message described from the controller under mode of operation containing calling the roll
Address and/or the address of compartment controller, the control data frame show comprising broadcast message, dynamic map display information, LCD screen
Show content, the working condition and fault message of equipment contained by inside of the oneself state data frame packet containing the controller and
The real-time communication conditions being related in the master-slave swap principle, institute is passed through in the controller under mode of operation
State control data frame and the oneself state data frame realizes data syn-chronization, from the control under mode of operation described in calling the roll
The controller under the main mode of operation is in described in device processed/compartment controller response, by sending oneself state
Data frame is as acknowledgement frame to the controller report working condition and fault message under the main mode of operation.
It is preferred that, reach that it judges C interface physics when the time that the controller detects no data in the physical layer
During the time gate limit value of layer failure, the controller judges that exception occurs in the physical layer of itself and the internal bus communications；When
The time that the controller detects no data in the physical layer is not up to its time threshold for judging C interface physical layer failure
Value and time for not receiving complete data frame on the protocol layer reach that it judges the time gate limit value of C interface protocol layer failure
When, the controller judges that its physical layer with the internal bus communications is normal and protocol layer failure.
It is preferred that, LIMIT11=LIMIT12+mT2, LIMIT21=LIMIT22+nT2, T2 is the bus cycles.
It is preferred that, m, n are relatively prime positive integers.
It is preferred that, LIMIT11 ≠ LIMIT21, LIMIT12 ≠ LIMIT22.
It is preferred that, LIMIT11 ＜ LIMIT21, LIMIT12 ＜ LIMIT22.
It is preferred that, when the communications status exception of the A interfaces or institute between the controller and the Train Control bus
When stating the communications status exception of the C interface between controller and the internal bus, in the institute in the main mode of operation
Controller is stated to send the roll-call data frame and send after the acknowledgement frame in the controller from mode of operation, institute
State controller and change its mode of operation.
It is preferred that, the controller under the main mode of operation sends the cycle of the roll-call data frame with being in
The controller under mode of operation or the cycle phase of the compartment controller response are same.
It is preferred that, the cycle that the controller under the main mode of operation sends the roll-call data frame includes hair
Send effectual time and send inactive time period, the controller under the main mode of operation is in the transmission effectual time hair
Send the roll-call data frame；Cycle bag in the controller under mode of operation or the compartment controller response
Response effectual time and response inactive time period are included, the response effectual time is corresponding with the transmission inactive time period, the place
It is in the controller or the compartment controller under mode of operation in the response effectual time response described
The controller under main mode of operation simultaneously reports working condition and fault message.
It is preferred that, the response effectual time is shorter than the transmission inactive time period.
It is preferred that, the internal bus uses the full duplex bus of half-duplex bus or network mode.
Because above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：The method of the present invention should
For can be realized in the vehicle-mounted broadcast system of subway two controllers according to its working condition automatic switchover mode of operation, without
Human users, can preferably realize the Automated condtrol to subway vehicle-mounted broadcasting system, and local event is reduced to greatest extent
Hinder the influence to broadcast system, so that the rate working properly of broadcast system is improved, so that system automation level is improved, reduction pair
The degree of dependence of personnel.Two controllers can realize real-time data syn-chronization simultaneously, it is ensured that letter is broadcasted when principal and subordinate switches
Breath, cartographic information occur without mistake, it is to avoid cause in switching working mode what subsequent control occurred that broadcast message misrepresents deliberately to ask
Topic.
Brief description of the drawings
Accompanying drawing 1 is the topology diagram of the vehicle-mounted broadcast system of subway.
Accompanying drawing 2 is that the switching principle that master-slave swap is carried out after controller judges the method for bus failure and broken down shows
It is intended to.
Accompanying drawing 3 is the sequential distribution schematic diagram of vehicle-mounted broadcasting internal system bus when internal bus uses half-duplex bus.
Embodiment
The invention will be further described for shown embodiment below in conjunction with the accompanying drawings.
Embodiment one：The vehicle-mounted broadcast system of subway on subway train includes two controllers, respectively positioned at headstock and
In two drivers' cabs of the tailstock, each controller is communicated, by B by the Train Control bus on A interfaces and subway train
The corresponding storage device of interface is communicated, communicated by the internal bus of C interface and the vehicle-mounted broadcast system of subway.It is located at
The two controllers of headstock and the tailstock have different address codes, respectively big address code in the vehicle-mounted broadcast system of subway
With small address code.When subway vehicle-mounted broadcasting system worked well, a controller need to undertake bus in main mode of operation
Control and Broadcasting Control function, another controller need to be in from mode of operation.Internal bus both can be full duplex bus,
It can be half-duplex bus.Below exemplified by using RS485 buses or similar half-duplex bus.
Two drivers' cabs are respectively each interface point of the controller in the first drivers' cab and the second drivers' cab, the first drivers' cab
Not Wei A1, B1, C1, each interface of the controller in the second drivers' cab is respectively A2, B2, C2.The state of each interface is with being realized
The relation of function is as shown in the table：
Having influence on the principal element that broadcast system normally shows and broadcasted on car has：Transfer bus error, Broadcasting Control master
There is event in equipment error, broadcast host and the Train Control bus transfer of machine faults itself, voice document and parameter storage file
Barrier.
It is a kind of to be applied in the vehicle-mounted broadcast system of above-mentioned subway realize that two controller subway hot standby each other is vehicle-mounted
Broadcast system master control hot spare method, including master-slave switching method and the aspect of principal and subordinate's method of work two.
First, master-slave switching method
Master-slave switching method is used to determining the mode of operation of controller, and mode of operation includes main mode of operation and from Working mould
Formula, therefore master-slave switching method is for determining that each controller need to enter main mode of operation still from mode of operation.
Master-slave switching method is：
The default priority rule based on controller address code, subway train key state of activation change switching principle, A interfaces
The principle of fault detect switching and the principle of B interface fault detect switching, the principle of C interface fault detect switching.
Based on controller address code priority rule be：Controller with small address code enters main mode of operation, had
The controller of big address code enters from mode of operation, or the controller with big address code enters main mode of operation, with small
The controller of address code enters from mode of operation.Using the first rule, the i.e. controller with small address code in the present embodiment
Controller into main mode of operation, with big address code enters from mode of operation.
Subway train key state of activation changes switching principle：The controller at end enters master where the key of subway train
Mode of operation, the key of subway train does not enter from mode of operation in the controller at end.
A interface faults detect that the principle of switching is：When the A of the normal and another side controller of A interfaces of a side controller connects
During port communications failure, then the controller of normal one end enters main mode of operation, and the controller of failure one end enters from mode of operation.
B interface fault detect switching principle be：When the B interface failure of a side controller, the B of another side controller connects
When mouth is normal, then the controller of failure one end enters from mode of operation, and the controller of normal one end enters main mode of operation.
In addition, judging that the time gate limit value of C interface physical layer failure is to the controller setting with big address code
LIMIT11, the time gate limit value for judging C interface physical layer failure is set to the controller with small address code for LIMIT12, and
LIMIT11≠LIMIT12.The time gate limit value of C interface protocol layer failure, which is, to be judged to the controller setting with big address code
LIMIT21, the time gate limit value for judging C interface protocol layer failure is set to the controller with small address code for LIMIT22, and
LIMIT21≠LIMIT22.Above-mentioned each time gate limit value and each judgement C interface protocol layer failure for judging C interface physical layer failure
Time gate limit value generally meet LIMIT11=LIMIT12+mT2, LIMIT21=LIMIT22+nT2, T2 is the bus cycles, its
Middle m, n are relatively prime positive integers.And for same controller, it judges the time gate limit value of C interface physical layer failure with sentencing
The time gate limit value of disconnected C interface physical layer failure is also different, i.e. LIMIT11 ≠ LIMIT21, LIMIT12 ≠ LIMIT22, generally
Take LIMIT11 ＜ LIMIT21, LIMIT12 ＜ LIMIT22.
During the vehicle-mounted broadcast system initial power-on of subway, controller enters according to the priority rule based on controller address code
Main mode of operation or from mode of operation.Under normal circumstances, subway train two ends are simultaneously upper electric, therefore, according to based on controller ground
The priority rule of location code, the controller of small address code enters main mode of operation, and the controller of big address code enters from mode of operation.
After upper electricity, each controller is judged state change condition in real time according to the frequency of setting, it has been decided to which it is
It is no to need to change mode of operation.State change condition includes the communications status of A interfaces between controller and Train Control bus, control
The communications status of C interface, subway are arranged between the communications status of B interface, controller and internal bus between device processed and storage device
Car key activated end state four.Wherein subway train key activated end state includes whether accessing key and which on subway train
Key is accessed in one end.
When every communications status (communications status for including the communications status of A interfaces, the communications status of B interface, C interface)
When not accessing key on normal and subway train, each controller keeps its current mode of operation constant.
When accessing key on every communications status normal and subway train, controller is activated according to subway train key
State change switching principle and enter main mode of operation or from mode of operation, i.e., the controller at end where key enters main Working mould
Formula, and controller of the key not at end enters from mode of operation.Subway train may not necessarily access key during system initial power-on, only
There is driver to get on the bus to prepare to drive or can just access key when needing to be tested, two are now determined by priority condition of key
The respective mode of operation of controller.
When the communications status of A interfaces is abnormal between controller and Train Control bus in state change condition, controller
The principle of switching is detected according to A interface faults and enters main mode of operation or the control from mode of operation, the i.e. normal one end of A interfaces
Device enters main mode of operation, and the controller of A interface faults one end enters from mode of operation.
When the communications status of B interface is abnormal between controller and storage device in state change condition, controller is according to B
Interface fault detects the principle of switching and entered into main mode of operation or the controller from the normal one end of mode of operation, i.e. B interface
Mode of operation is become owner of, the controller of B interface failure one end enters from mode of operation.
When the communications status of C interface is abnormal between controller and internal bus in state change condition, controller is according to C
The principle of interface fault detection switching is operated pattern switching, is specially：To the physical layer and protocol layer of internal bus communications
It is monitored.If judging the time gate limit value of C interface physical layer failure based on it in the controller from mode of operation and judging
Go out itself and internal bus communications physical layer occur it is abnormal, i.e., internal bus no data when, illustrate to be now likely to occur it is internal always
Line hard ware disconnection/other side controller failure/two controller enter from mode of operation the problem of, usual two controllers enter
Enter from mode of operation and be not in, therefore consider bus hardware disconnection/other side's controller failure emphatically.Now, in from work
The controller of pattern detects internal bus no data, then in order to avoid there is the situation of the controller of dereliction mode of operation, should
It is main mode of operation in being changed from the controller of mode of operation, it is ensured that at least one controller is right in main mode of operation
The vehicle-mounted broadcast system of subway is controlled.If the controller in main mode of operation judges C interface protocol layer failure based on it
Time gate limit value and judge its physical layer with internal bus communications normal and during protocol layer failure, show when the first two control
Device is in main mode of operation, such as it is possible that this state after foregoing train controlling bus hardware fault is excluded, then at this
It is replaced by the controller of main mode of operation from mode of operation, surrenders bus scheduling power.Because two side controllers judge that C interface is assisted
The time gate limit value for discussing layer failure differs n bus cycles, so as to avoid the controller at two ends while carrying out master-slave swap.
During controller noted above is to physical layer and protocol layer monitoring, two controllers are provided with judgement C interface
The time gate limit value of physical layer failure and the time gate limit value for judging C interface protocol layer failure.Pass through the judgement C interface physical layer
The setting of the time gate limit value of failure and the time gate limit value for judging C interface protocol layer failure, can avoid controller Working mould
Formula occurs ping-pong due to signal jitter when switching, and frequently changes mode of operation.
When the time that controller detects no data in physical layer, (time of no data is united by physical layer timer
Meter) when reaching that it judges the time gate limit value of C interface physical layer failure, controller judges its physics with internal bus communications
Layer occurs abnormal；When the time that controller detects no data in physical layer be not up to its judge C interface physical layer failure when
Between (time for not receiving complete data frame passes through protocol layer threshold value and time for not receiving complete data frame on protocol layer
Timer is counted) when reaching that it judges the time gate limit value of C interface protocol layer failure, controller judges that it is total with inside
The physical layer of line communication is normal and protocol layer failure.
Controller also needs to judge the communication with storage device in addition to judging whether the communication with internal bus is normal,
That is whether read-write storage device is effective, needs to enter from mode of operation if invalid.
Controller noted above carry out master-slave swap during, because of interface fault the priority of switching working mode be higher than because
The priority of key state of activation and switching working mode.
Accompanying drawing 2, which is shown after controller noted above judges the method for bus failure and broken down, carries out cutting for master-slave swap
Change principle.
2nd, principal and subordinate's method of work
Principal and subordinate's method of work is used to realize the work for entering main mode of operation or the controller from mode of operation.
Principal and subordinate's method of work is：
Controller scheduling train controlling bus and/or internal bus sending point name data frame under main mode of operation
(roll-call frame), control data frame (control frame) and/or oneself state data frame (status frames), so as to realize subway vehicle-mounted broadcasting system
The broadcasted content control of system and control, the content-control that dynamic map is shown, the display content control of LCD screen for starting stopping.
The frame head of roll-call data frame is in from the address and/or compartment of the controller under mode of operation comprising specified loopback message of calling the roll
The address of controller, control data frame is comprising broadcast message (including in the control display such as site information, broadcasting handover information
Hold), dynamic map display information, LCD screen display content, work of the oneself state data frame packet containing contained equipment inside the controller
Make the real-time communication conditions being related in state, fault message, its place end key state of activation and master-slave swap principle (such as
Controller internal state, key state of activation, fault message etc.).
In realizing data syn-chronization from the controller under mode of operation by control data frame and oneself state data frame, with
The state of a control synchronized tracking of two controllers is realized, internal control mode is consistent, is finally reached to subway vehicle-mounted broadcasting system
Control effect uncontrolled device mode of operation switching to greatest extent influence, in being compared from the controller under mode of operation
In the controller under main mode of operation, broadcasting speech information and display content information are not only exported externally, i.e., does not export control
Frame processed and roll-call frame.When the address of response is consistent with this controller address the need for frame head part, i.e., in from mode of operation
Under controller/compartment controller called the roll, then from controller/compartment controller under mode of operation obtain bus transmission route and
Response is in the controller under main mode of operation, and by sending oneself state data frame as acknowledgement frame in main work
Controller report working condition, fault message under pattern and end key state of activation where it.By data syn-chronization, make to be in
The controller worked under mode of operation, its site information, call out the stops control, parameter configuration, warning message etc. are followed be in completely
The controller worked under main mode of operation, so as to ensure the energy not damaged switching when occurring master-slave swap, it is ensured that in master-slave swap
Voice mistake and dynamic map that Shi Buhui calls out the stops, the website of LCD screen update mistake.
As shown in Figure 3, the controller under main mode of operation is by the sending point of cycle T 1 name data frame, and is in from Working mould
Controller or compartment controller under formula carry out response by cycle T 2.Controller sending point name data under main mode of operation
The cycle T 1 of frame is identical from the controller under mode of operation or the cycle T of compartment controller response 2 with being in.
The cycle T 1 of controller sending point name data frame under main mode of operation includes sending effectual time T11 and hair
Inactive time period T12 is sent, the controller under main mode of operation is sending effectual time T11 sending points name data frame.In from
The cycle of controller or compartment controller response under mode of operation includes response effectual time T21 and response inactive time period T22,
It is corresponding that response effectual time T21 and at least part send inactive time period T12, response effectual time T21 be shorter than transmission it is invalid when
Section T12.In from the controller or compartment controller under mode of operation response effectual time T21 responses be in main mode of operation
Under controller and report working condition and fault message.
In master-slave switching method, when the communications status of A interfaces between controller and Train Control bus is abnormal or control
The communications status of B interface is abnormal (including the communication with internal bus C interface during full duplex internal bus between device and internal bus
During abnormal state) when, in the controller sending point name data frame in main mode of operation and in the controller from mode of operation
Send after acknowledgement frame, controller just changes its mode of operation.When internal bus is half-duplex, when C interface communication occurs abnormal then
Judgment principle according to physical layer, protocol layer is switched over.
Above is internal bus is using working method when RS485 buses or similar half-duplex bus.If internal bus
Using the full duplex bus of network mode, then the transmission cycle of controller, can be roll-call answer party without above-mentioned strict control
The formula state of being replaced by, which changes, sends the mode of acknowledgement frame.
By above hot spare method, it can reduce what interface fault updated to broadcast system broadcast and website to greatest extent
Harmful effect.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention
The equivalent change or modification that Spirit Essence is made, should all be included within the scope of the present invention.
Claims (10)
1. a kind of vehicle-mounted broadcast system master control hot spare method of subway, applied in the vehicle-mounted broadcast system of subway on subway train,
To realize that two controllers for being divided into the vehicle-mounted broadcast system of the subway of its headstock and the tailstock are hot standby each other, each controller
Communicated, communicated by the corresponding storage device of B interface with the Train Control bus on the subway train by A interfaces
Believe, communicated by the internal bus of C interface and the vehicle-mounted broadcast system of the subway；Positioned at two controls of headstock and the tailstock
Device processed has different address codes in the vehicle-mounted broadcast system of subway；
It is characterized in that：The vehicle-mounted broadcast system master control hot spare method of subway includes master-slave switching method and principal and subordinate work side
Method；
The master-slave switching method is used to determining the mode of operation of the controller, the mode of operation include main mode of operation and
From mode of operation；
The master-slave switching method is：The default priority rule based on controller address code, subway train key state of activation change
Become switching principle, the principle of A interface faults detection switching, the principle of B interface fault detect switching, C interface fault detect switching
Principle；
It is described based on controller address code priority rule be：The controller with small address code enters the main Working mould
Formula, the controller with big address code enter described from mode of operation or the controller with big address code enters institute
State main mode of operation, the controller with small address code and enter described from mode of operation；The subway train key activation
State change switching principle is：The controller at end enters the main mode of operation, institute where the key of the subway train
State the controller of the key of subway train not at end and enter described from mode of operation；The A interface faults detection switching
Principle is：When the A interfaces of controller described in one end are normal and the other end described in controller A interface communication failures when, then normally
The controller of one end enters the main mode of operation, and the controller of failure one end enters described from mode of operation；Institute
State B interface fault detect switching principle be：When controller described in one end B interface failure and the other end described in controller B
When interface is normal, then the controller of failure one end enters described from mode of operation, and the controller of normal one end enters
The main mode of operation；
The time gate limit value for judging C interface physical layer failure is set to the controller with big address code for LIMIT11, it is right
The controller with small address code sets the time gate limit value for judging C interface physical layer failure for LIMIT12, LIMIT11
≠LIMIT12；The time gate limit value of C interface protocol layer failure, which is, to be judged to the controller setting with big address code
LIMIT21, judges that the time gate limit value of C interface protocol layer failure is to the controller setting with small address code
LIMIT22, LIMIT21 ≠ LIMIT22；
During the vehicle-mounted broadcast system initial power-on of the subway, the controller is according to the preferential rule based on controller address code
Then enter the main mode of operation or described from mode of operation；The controller is judged state change condition, with certainly
Fixed whether to change its mode of operation, the state change condition includes the controller and the controlling bus Train Control bus
Between the communications status of the B interface between the communications status of the A interfaces, the controller and the storage device, described
The communications status of the C interface, subway train key activated end state four between controller and the internal bus：Work as items
The communications status is normal and the subway train on when not accessing key, the controller keeps its mode of operation constant；
When every communications status is normal and the subway train on access key when, the controller is according to the subway train
Key state of activation changes switching principle and enters the main mode of operation or described from mode of operation；When the state changes bar
When the communications status of the A interfaces is abnormal between controller described in part and the controlling bus Train Control bus, the control
Device processed detects the principle of switching according to the A interface faults and enters the main mode of operation or described from mode of operation；Work as institute
When stating the communications status exception of the B interface between controller and the storage device described in state change condition, the control
Device processed enters the main mode of operation or described from mode of operation according to the principle that the B interface fault detect switches；Work as institute
When stating the communications status exception of the C interface between controller and the internal bus described in state change condition, the control
The principle that device processed switches according to the C interface fault detect is operated pattern switching, if in the control from mode of operation
Device processed judges the time gate limit value of C interface physical layer failure based on it and judges its physical layer with the internal bus communications
When occurring abnormal, it is main mode of operation that should be in from the controller replacing of mode of operation；If the institute in main mode of operation
Controller is stated to judge the time gate limit value of C interface protocol layer failure based on it and judge itself and the controlling bus Train Control
The physical layer of bus communication is normal and during protocol layer failure, should be replaced by described controller of main mode of operation from Working mould
Formula；
Priority of the priority of switching working mode higher than the switching working mode because of key state of activation because of interface fault；
Principal and subordinate's method of work, which is used to realize, enters the main mode of operation or the controller from mode of operation
Work；
Principal and subordinate's method of work is：The controller under the main mode of operation dispatch the Train Control bus/
Or the internal bus sending point name data frame, control data frame and/or oneself state data frame, so as to realize the subway
Carry the broadcasted content control of broadcast system and start the control stopped, the content-control that dynamic map is shown, in the display of LCD screen
Hold control, the roll-call data frame packet specifies being in for loopback message described from the controller under mode of operation containing calling the roll
Address and/or the address of compartment controller, the control data frame show comprising broadcast message, dynamic map display information, LCD screen
Show content, the working condition of equipment, fault message, its institute contained by inside of the oneself state data frame packet containing the controller
The real-time communication conditions being related in end key state of activation and the master-slave swap principle, in described from mode of operation
Under the controller data syn-chronization is realized by the control data frame and the oneself state data frame, described in calling the roll
The control under the main mode of operation is in described in the controller/compartment controller response under from mode of operation
Device, by sending oneself state data frame as acknowledgement frame to the controller report work under the main mode of operation
Make state, fault message and end key state of activation where it.
2. the vehicle-mounted broadcast system master control hot spare method of subway according to claim 1, it is characterised in that：When the controller
When the time for detecting no data in the physical layer reaches that it judges the time gate limit value of C interface physical layer failure, the control
Device processed judges that exception occurs in the physical layer of itself and the internal bus communications；When the controller is detected in the physical layer
The time of no data is not up to the time gate limit value that it judges C interface physical layer failure and not received on the protocol layer complete
When the time of data frame reaches that it judges the time gate limit value of C interface protocol layer failure, the controller judge its with it is described
The physical layers of internal bus communications is normal and protocol layer failure.
3. the vehicle-mounted broadcast system master control hot spare method of subway according to claim 1 or 2, it is characterised in that：LIMIT11=
LIMIT12+mT2, LIMIT21=LIMIT22+nT2, T2 are the bus cycles, and m, n are relatively prime positive integers.
4. the vehicle-mounted broadcast system master control hot spare method of subway according to Claims 2 or 3, it is characterised in that：LIMIT11≠
LIMIT21, LIMIT12 ≠ LIMIT22.
5. the vehicle-mounted broadcast system master control hot spare method of subway according to claim 4, it is characterised in that：LIMIT11 ＜
LIMIT21, LIMIT12 ＜ LIMIT22.
6. the vehicle-mounted broadcast system master control hot spare method of subway according to claim 1, it is characterised in that：When the controller
The communications status of the A interfaces is abnormal between the Train Control bus or the controller and the internal bus between institute
State C interface communications status it is abnormal when, the controller in the main mode of operation send the roll-call data frame and
Sent in the controller from mode of operation after the acknowledgement frame, the controller changes its mode of operation.
7. the vehicle-mounted broadcast system master control hot spare method of subway according to claim 1, it is characterised in that：In the main work
It is described from the control under mode of operation with being in that the controller under operation mode sends the cycle of the roll-call data frame
Device or the cycle phase of the compartment controller response are same.
8. the vehicle-mounted broadcast system master control hot spare method of subway according to claim 7, it is characterised in that：In the main work
The cycle that the controller under operation mode sends the roll-call data frame includes sending effectual time and sends inactive time period, place
In the controller under the main mode of operation roll-call data frame is sent in the transmission effectual time；In it is described from
When the cycle of the controller or the compartment controller response under mode of operation includes response effectual time and invalid response
Section, the response effectual time is corresponding with the transmission inactive time period, it is described described in from the control under mode of operation
Device processed or the compartment controller are in the controller under the main mode of operation simultaneously in the response effectual time response
Report working condition and fault message.
9. the vehicle-mounted broadcast system master control hot spare method of subway according to claim 8, it is characterised in that：The response is effective
Period is shorter than the transmission inactive time period.
10. the vehicle-mounted broadcast system master control hot spare method of subway according to claim 1, it is characterised in that：The inside is total
Line uses the full duplex bus of half-duplex bus or network mode.
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| CN201710280988.5A CN107222329B (en) | 2017-04-26 | 2017-04-26 | Master control hot standby method of subway vehicle-mounted broadcasting system |
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| CN111193601A (en) * | 2018-11-15 | 2020-05-22 | 宝沃汽车（中国）有限公司 | Configuration method and device of vehicle-mounted audio network and vehicle |
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