CN107703921A - Train automatic monitoring system yard method for handover control - Google Patents
Train automatic monitoring system yard method for handover control Download PDFInfo
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- CN107703921A CN107703921A CN201711023331.7A CN201711023331A CN107703921A CN 107703921 A CN107703921 A CN 107703921A CN 201711023331 A CN201711023331 A CN 201711023331A CN 107703921 A CN107703921 A CN 107703921A
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- internal memory
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The embodiments of the invention provide a kind of train automatic monitoring system yard method for handover control,Station yard data in this method for being had shown that in internal memory,If its data hit rate and data duration meet to impose a condition,Then it is moved in caching,When needing to switch over,If judge data storage in the buffer,Then directly the station yard data is loaded into internal memory from caching and shown,So as to when repeating to switch circuit picture,If know the data in the buffer,The process that simultaneously format transformation is read from hard disk need not then be repeated,Directly it is loaded into from caching in internal memory,And the time that the process that data are loaded from caching is spent will be lacked more than the time loaded from local hard drive,Therefore the speed of switching can be effectively improved,Especially in frequent switching,It can effectively prevent the stuck situation of picture from occurring,Realize the yard traffic-operating period for monitoring each circuit in real time,Ensure safe train operation.
Description
Technical field
The present embodiments relate to software technology field, and in particular to a kind of train automatic monitoring system yard switching control
Method.
Background technology
NATS (Network Automatic Train Supervision System) networking train monitors and is automatically
System, as networking monitoring operation platform in urban track traffic, system obtains the train and signalling arrangement of each circuit in real time
Status data, and pass through networking scheduling interface instant playback.
Yard interface provides signalling arrangement monitoring and train status function for monitoring, and yard interface obtains on-site signal and train
The real time status information of operation, and these information are faithfully showed dispatcher, facilitate dispatcher according to field condition
Carry out Train Detection and Identification.
On NATS dispatching workstations, multi-line yard interface can manually be switched over.The yard of each circuit is monitored in real time
Traffic-operating period, to mitigate running scheduling personnel's homework burden, the efficiency and service level of metro operation are lifted, ensure train safety
Operation.
Networking train automatic monitored control system can monitor the train of each circuit and the status data of signalling arrangement at present,
Networking dispatching workstations uniformly show dispatcher.However, inventor has found during innovation and creation are realized, each line
The status data on road is stored in local hard drive, and the picture of monitoring system if desired is switched into a certain circuit, then needed
The status data of the circuit stored in local hard drive is first read in internal memory, then by the data of reading according to specified number
It is stored in internal memory after being changed according to structure and is finally shown, the status data can be discharged after display at once.If necessary to again
It is secondary to switch to the circuit, then to need to repeat said process.This reading and carry out data conversion process take it is more,
And then yard switch speed can be caused slower.Especially when needing to carry out frequent switching, it is easy to because switch speed is slower
The seemingly-dead situation in yard interface is caused to occur.
The content of the invention
The embodiment of the present invention provide one kind is used for train automatic monitoring system yard method for handover control and device, for gram
Take existing switching method needs to repeat to read data from hard disk when repeating to switch, and causes yard switching efficiency is low to lack
Fall into.
In a first aspect, the embodiment of the present invention provides a kind of train automatic monitoring system yard method for handover control, including：
For the station yard data having shown that being stored in internal memory, if judging the data hit rate of the station yard data
And data duration meets to impose a condition, then the station yard data is moved in caching and stored；
When needing to carry out yard changing interface, if to be switched station yard data storage is judged in the buffer, by described in
Station yard data is loaded into internal memory from caching and shown；
Wherein, the data hit rate is used to describe the frequency that the station yard data is shown, the data duration is used to retouch
State the last residence time being shown in internal memory of station yard data distance；It is described impose a condition including：Data hit rate reaches
Reach the first duration to hit rate threshold value and data duration, or data hit rate is not up to hit rate threshold value and data duration reaches
Second duration.
Alternatively, methods described also includes：
If judge the data hit rate of the station yard data and data duration be unsatisfactory for it is described impose a condition, will described in
Station yard data is resided in internal memory.
Alternatively, methods described also includes：
When needing to carry out yard changing interface, if judging, to be switched station yard data is stored in internal memory, directly aobvious
Show the station yard data；
If judging, to be switched station yard data is stored in local hard drive, the station yard data is loaded, by specified
It is stored in internal memory and is shown after data structure conversion.
Alternatively, system data maintenance table is stored with internal memory, each station is stored with the system data maintenance table
The data hit rate of field data, the display number of station yard data, data access times and display moment；The data time use
Number is that station yard data shows that number is loaded on the number sum of internal memory with station yard data；
Call number or station yard data title and data of the system data maintenance table also including each station yard data are deposited
Storage state, the state data memory are used to describe the currently stored position of the station yard data.
Alternatively, the storage location of to be switched station yard data is judged, including：
According to the call number of to be switched station yard data or station yard data title, carried out in the system data maintenance table
Search；
If record has the station yard data in the system data maintenance table, according to data corresponding to the station yard data
Storage state determines its storage location.
Alternatively, methods described also includes：
For each station yard data, after storage location change, the station yard data in the system data maintenance table is updated
Corresponding state data memory.
Alternatively, methods described also includes：
After each station yard data is shown, when updating data hit rate corresponding to the station yard data and the display
Carve.
Alternatively, methods described also includes：
According to the state data memory of each station yard data in the system data maintenance table, if judging to be stored in internal memory
Station yard data reach default storage cap, then each station yard data being stored in internal memory is arranged by data hit rate
Sequence, hit rate is moved in caching less than the station yard data of specified threshold and stored.
Alternatively, the data hit rate is calculated by equation below：
The display number of data hit rate=station yard data/(data access times+1).
Alternatively, difference during data at the time of a length of current system with the display moment.
The embodiments of the invention provide a kind of train automatic monitoring system yard method for handover control, for interior in this method
The station yard data being had shown that in depositing, if its data hit rate and data duration meet to impose a condition, it is moved to
In caching, when needing to switch over, if judging data storage in the buffer, directly the station yard data is loaded into from caching
Shown in internal memory, so as to when repeating to switch circuit picture, if knowing the data in the buffer, repeat from hard disk
The process of simultaneously format transformation is read, is directly loaded into from caching in internal memory, and the process flower of data is loaded from caching
The time of expense will be lacked more than the time loaded from local hard drive, therefore can effectively improve the speed of switching, especially frequent
During switching, it can effectively prevent the stuck situation of picture from occurring, realize the yard traffic-operating period for monitoring each circuit in real time, ensure train
Safe operation.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is a kind of train automatic monitoring system yard method for handover control flow chart provided in an embodiment of the present invention；
Fig. 2 is a kind of data store organisation schematic diagram provided in an embodiment of the present invention；
Fig. 3 is a kind of flow chart that processing is stored to internal storage data provided in an embodiment of the present invention；
Fig. 4 is a kind of flow chart performed to switching provided in an embodiment of the present invention；
Fig. 5 is a kind of train automatic monitoring system yard switching control structural representation provided in an embodiment of the present invention
Figure；
Fig. 6 is a kind of computer equipment example structure block diagram provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In a first aspect, the embodiments of the invention provide a kind of train automatic monitoring system yard method for handover control, such as Fig. 1
It is shown, including：
S101, the station yard data having shown that for being stored in internal memory, if judging the data of the station yard data
Hit rate and data duration meet to impose a condition, then the station yard data are moved in caching and stored；
Wherein, the data hit rate is used to describe the frequency that the station yard data is shown, the data duration is used to retouch
State the last residence time being shown in internal memory of station yard data distance；It is described impose a condition including：Data hit rate reaches
Reach the first duration to hit rate threshold value and data duration, or data hit rate is not up to hit rate threshold value and data duration reaches
Second duration.
S102, when needing to carry out yard changing interface, if judging to be switched station yard data storage in the buffer, general
The station yard data is loaded into internal memory from caching to be shown.
In method provided in an embodiment of the present invention, for the station yard data being had shown that in internal memory, if its data hit
Rate and data duration meet to impose a condition, then are moved in caching, when needing to switch over, if judging data storage
In the buffer, then directly the station yard data is loaded into internal memory from caching and shown, so that when repeating to switch circuit picture, if
Know the data in the buffer, then need not repeat the process that simultaneously format transformation is read from hard disk, directly be loaded from caching
To in internal memory, and the time that the process that data are loaded from caching is spent will more than the time loaded from local hard drive
It is few, therefore the speed of switching can be effectively improved, especially in frequent switching, it can effectively prevent the stuck situation of picture from occurring,
The yard traffic-operating period for monitoring each circuit in real time is realized, ensures safe train operation.
Understandable to be, the embodiment of the present invention can be switched fast to realize, be carried out mainly at two aspects
Improve, first is the storage processing for data, and second is when switching over for data loading processing, and can be realized
A more important factor in terms of the two is to be stored with the system data maintenance table of each station yard data state, below
It is described in detail with reference to accompanying drawing for this 3 points.
(1) system data maintenance table
Referring to Fig. 2, Fig. 2 shows storage organization figure provided in an embodiment of the present invention.Wherein yard initial data is yard
The basic configuration data at interface, comprising master datas such as semaphore, platform, sections, it is stored in local hard disk HDD (Hard
Disk Drive) in；Internal storage data is that yard initial data is read in Installed System Memory from local hard drive by computer, then
According to what is obtained after specified data structure conversion；Data cached is at this by internal storage data according to specified data structure storage
HDD data on ground hard disk, that is to say, that caching here be in fact specially hewed out on local hard drive come be used for storage part
Divide the disk space for the internal storage data being moved, the data structure stored in the buffer and the data structure stored in internal memory
Can be identical, so as in the time of loading time about data conversion.
System data maintenance table is mainly used in safeguarding the state of each station yard data.It can be specifically included in the table：Yard
Call number or station yard data title, state data memory, data hit rate, the display number of station yard data, the data of data make
With number, (station yard data before being specially this operation to data shows that number is loaded on the secondary of internal memory with station yard data
Number sum) and the display moment.
Wherein, state data memory here can be represented by some marks, for example, 0 can represent data for original
Beginning, data storage was in local hard drive；1 can represent that data are internal storage data in internal memory；2 can represent data for caching
Data storage is in the buffer.
Based on system data maintenance table, the optional side of calculating of the one of which of the data hit rate in above method embodiment
Formula is：
The display number of data hit rate=station yard data/(data access times+1).
In addition, a kind of optional calculation of data duration is in above method embodiment：
At the time of data duration=current system-the display moment.
(2) the storage processing for internal storage data
Referring to Fig. 3, Fig. 3 shows a kind of detailed handling process for internal storage data.
Number of the method provided in an embodiment of the present invention using system timer period according to each station yard data in internal memory
Also it is moved to according to hit rate and data duration to determine that the data are resided in internal memory in buffering.
When reaching the triggering cycle of system timer, scanning system data maintenance table one by one first, to what is wherein identified
Internal storage data is handled.If state data memory is in 0 representative is stored in local hard drive, 1 representative is stored in Maintenance Table
In depositing, 2 represent storage in the buffer, then handling process is as follows：
1) data hit rate of current station yard data reach hit rate threshold value (data can configure, for example, 85%) when,
If the data duration (namely present system time and the difference at display moment) of the station yard data reaches the first duration (such as 2
Hour, the data can configure), then need to store data into buffer area, state data memory is set to 2, updates system data
Maintenance Table；Otherwise this data continues to reside in internal memory；
2) data hit rate of current station yard data be less than hit rate threshold value (configurable data, for example, 85%) when,
If the difference of present system time and data duration reaches the second duration (such as 0.5 hour, the data can configure), then need by
Data Cun Chudao buffer areas, state data memory is set to 2, updates system data maintenance table, otherwise this data continues to reside in
Internal memory.
Namely above-mentioned steps are by hit rate is higher but the terminate-and-stay-resident time is longer or hit rate is not high but the terminate-and-stay-resident time
Longer data are moved into caching, once these station yard datas need to show again, then as long as adding again from caching
Load.
It is understood that the memory capacity of internal memory is limited, once the data of storage exceed the maximum size of internal memory,
Also the normal operation of internal memory can certainly will be influenceed.Therefore method provided in an embodiment of the present invention can also include：
According to the state data memory of each station yard data in system data maintenance table, if judging the station being stored in internal memory
Field data reaches default storage cap, then is ranked up each station yard data being stored in internal memory by data hit rate,
Hit rate is moved in caching less than the station yard data of specified threshold and stored, and state data memory is set to 2, more new system
Data maintenance table.So as to ensure be not in due to internal storage data it is excessive caused by internal memory spill-over phenomenon.
(3) when switching over for data loading processing
Referring to Fig. 4, Fig. 4 shows a kind of detailed process for data loading processing when switching over.
System mode Maintenance Table is initialized first, when needing to carry out the switching at yard interface, obtains the yard number first
According to call number or station yard data title.The note of matching is searched whether in system mode Maintenance Table according to call number or title
Record.If judgement there are, following steps are performed：
State data memory corresponding to the station yard data is obtained, can be had according to different state data memories following several
Different processing modes.
1) if state data memory is 0, then it represents that data are initial data state, are stored in local hard drive.It is then
System can be loaded from yard initial data described in local hard drive, and is stored in internal memory after changing by designated data structure
Row display.State data memory is set to 1 afterwards, the display number 0 of data is not (because the data are entered also before this display
Went display, display number here does not include this display number), data access times are 0 (display number 0+ loadings time
Number 0=0, because data access times here are this data access times before operating, the number before this operation
Operated according to not carrying out also showing or loading, so its data access times is 0), data hit rate is set to 0% (0/ (0+1)
=0), station yard data shows that the moment is set to current time.Here by current time record touched to be reached in system timer
When sending out the cycle, can according to the difference of system time and this current time during triggering come determine after this time showing to
The duration that this one piece of data of triggering cycle is resided in internal memory.
2) if state data memory is 1, then it represents that data in internal memory, then directly display yard interface content.
It is assumed that data access times be 1 (because the data at least carried out once showing before in internal memory, illustrate, vacation here
If show once before, data access times here are the numbers for not including this display), after data access times add 1
For 2, data hit rate is set to 1/2=50%, and station yard data shows that the moment is set to current time；
3) if state data memory is 2, then it represents that in the buffer, the data of caching are loaded into internal memory for data
Shown again.State data memory is set to 1 afterwards, it is assumed that showed in internal memory before the data and once moved later
Into caching, then data access times are set to 2 (display number 1+ is this time loaded 1=2), display number is also set to 1.Number
According to hit rate=display number/(data access times+1)=1/3=33.3%.The display moment is then set to current time.
So as to complete loading and the system data maintenance table for the data of different storage states by above-mentioned steps
Renewal processing.
Second aspect, the embodiments of the invention provide a kind of train automatic monitoring system yard switching control, such as Fig. 5
It is shown, including, processing unit 201, it is used for：
For the station yard data having shown that being stored in internal memory, if judging the data hit rate of the station yard data
And data duration meets to impose a condition, then the station yard data is moved in caching and stored；
When needing to carry out yard changing interface, if to be switched station yard data storage is judged in the buffer, by described in
Station yard data is loaded into internal memory from caching and shown；
Wherein, the data hit rate is used to describe the frequency that the station yard data is shown, the data duration is used to retouch
State the last residence time being shown in internal memory of station yard data distance；It is described impose a condition including：Data hit rate reaches
Reach the first duration to hit rate threshold value and data duration, or data hit rate is not up to hit rate threshold value and data duration reaches
Second duration.
Alternatively, the processing unit 201 is additionally operable to：
If judge the data hit rate of the station yard data and data duration be unsatisfactory for it is described impose a condition, will described in
Station yard data is resided in internal memory.
Alternatively, the processing unit 201 is additionally operable to：
When needing to carry out yard changing interface, if judging, to be switched station yard data is stored in internal memory, directly aobvious
Show the station yard data；
If judging, to be switched station yard data is stored in local hard drive, the station yard data is loaded, by specified
It is stored in internal memory and is shown after data structure conversion.
Alternatively, system data maintenance table is stored with internal memory, each station is stored with the system data maintenance table
The data hit rate of field data, the display number of station yard data, data access times and display moment；The data time use
Number is that station yard data shows that number is loaded on the number sum of internal memory with station yard data；
Call number or station yard data title and data of the system data maintenance table also including each station yard data are deposited
Storage state, the state data memory are used to describe the currently stored position of the station yard data.
Alternatively, depositing for be switched station yard data is judged based on said system data maintenance table, the processing unit 201
Storage space is put, including：
According to the call number of to be switched station yard data or station yard data title, carried out in the system data maintenance table
Search；
If record has the station yard data in the system data maintenance table, according to data corresponding to the station yard data
Storage state determines its storage location.
Alternatively, it is additionally operable to based on said system data maintenance table, the processing unit 201：
For each station yard data, after storage location change, the station yard data in the system data maintenance table is updated
Corresponding state data memory.
Alternatively, it is additionally operable to based on said system data maintenance table, the processing unit 201：
After each station yard data is shown, when updating data hit rate corresponding to the station yard data and the display
Carve.
Alternatively, it is additionally operable to based on said system data maintenance table, the processing unit 201：
According to the state data memory of each station yard data in the system data maintenance table, if judging to be stored in internal memory
Station yard data reach default storage cap, then each station yard data being stored in internal memory is arranged by data hit rate
Sequence, hit rate is moved in caching less than the station yard data of specified threshold and stored.
Alternatively, calculated based on said system data maintenance table, the data hit rate by equation below：
The display number of data hit rate=station yard data/(data access times+1).
Alternatively, based on said system data maintenance table, during the data at the time of a length of current system with the display
The difference at moment.
By the train automatic monitoring system yard switching control that the present embodiment is introduced is that can perform the present invention
The device of train automatic monitoring system yard method for handover control in embodiment, so based on described in the embodiment of the present invention
Train automatic monitoring system yard switching control method, those skilled in the art can understand the train of the present embodiment
The embodiment of automatic monitored control system yard switching control and its various change form, so herein for the row
How car automatic monitored control system yard switching control realizes that the train automatic monitoring system yard in the embodiment of the present invention is cut
Control method is changed no longer to be discussed in detail.As long as those skilled in the art implement train automatic monitoring system in the embodiment of the present invention
Device used by system yard method for handover control, belongs to the scope to be protected of the application.
Fig. 6 shows the structured flowchart of computer equipment provided in an embodiment of the present invention.
Reference picture 6, the computer equipment, including：Processor (processor) 301, memory (memory) 302 and
Bus 303；
Wherein, the processor 301 and memory 302 complete mutual communication by the bus 303.
The processor 301 is used to call the programmed instruction in the memory 302, to perform above-mentioned each method embodiment
The method provided.
A kind of computer program product is also disclosed in the embodiment of the present invention, and the computer program product is non-temporary including being stored in
Computer program on state computer-readable recording medium, the computer program include programmed instruction, when described program instructs
When being computer-executed, computer is able to carry out the method that above-mentioned each method embodiment is provided.
The embodiment of the present invention also provides a kind of non-transient computer readable storage medium storing program for executing, and the non-transient computer is readable to deposit
Storage media stores computer instruction, and the computer instruction makes the computer perform the side that above-mentioned each method embodiment is provided
Method.
In the specification that this place provides, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the present invention
Example can be put into practice in the case of these no details.In some instances, known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand one or more of each inventive aspect,
Above in the description to the exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following intention：I.e. required guarantor
The application claims of shield features more more than the feature being expressly recited in each claim.It is more precisely, such as following
Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following embodiment are expressly incorporated in the embodiment, wherein each claim is in itself
Separate embodiments all as the present invention.
Those skilled in the art, which are appreciated that, to be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more equipment different from the embodiment.Can be the module or list in embodiment
Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or
Sub-component.In addition at least some in such feature and/or process or unit exclude each other, it can use any
Combination is disclosed to all features disclosed in this specification (including adjoint claim, summary and accompanying drawing) and so to appoint
Where all processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification (including adjoint power
Profit requires, summary and accompanying drawing) disclosed in each feature can be by providing the alternative features of identical, equivalent or similar purpose come generation
Replace.
In addition, it will be appreciated by those of skill in the art that although some embodiments in this include institute in other embodiments
Including some features rather than further feature, but the combination of the feature of different embodiments means to be in the scope of the present invention
Within and form different embodiments.For example, in the following claims, embodiment claimed it is any it
One mode can use in any combination.
Some unit embodiments of the present invention can be realized with hardware, or to be run on one or more processor
Software module realize, or realized with combinations thereof.It will be understood by those of skill in the art that it can use in practice
Microprocessor or digital signal processor (DSP) are realized in gateway according to embodiments of the present invention, proxy server, system
Some or all parts some or all functions.The present invention is also implemented as being used to perform side as described herein
The some or all equipment or program of device (for example, computer program and computer program product) of method.It is such
Realizing the program of the present invention can store on a computer-readable medium, or can have the shape of one or more signal
Formula.Such signal can be downloaded from internet website and obtained, and either be provided or with any other shape on carrier signal
Formula provides.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and ability
Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" before element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of some different elements and being come by means of properly programmed computer real
It is existing.In if the unit claim of equipment for drying is listed, several in these devices can be by same hardware branch
To embody.The use of word first, second, and third does not indicate that any order.These words can be explained and run after fame
Claim.
Claims (10)
- A kind of 1. train automatic monitoring system yard method for handover control, it is characterised in that including：For the station yard data having shown that being stored in internal memory, if judge the station yard data data hit rate and Data duration meets to impose a condition, then the station yard data is moved in caching and stored；When needing to carry out yard changing interface, if to be switched station yard data storage is judged in the buffer, by the yard Data are loaded into internal memory from caching and shown；Wherein, the data hit rate is used to describe the frequency that the station yard data is shown, the data duration is used to describe institute State the last residence time being shown in internal memory of station yard data distance；It is described impose a condition including：Data hit rate reaches life Middle rate threshold value and data duration reach the first duration, or data hit rate is not up to hit rate threshold value and data duration reaches second Duration.
- 2. according to the method for claim 1, it is characterised in that methods described also includes：If judge the data hit rate of the station yard data and data duration be unsatisfactory for it is described impose a condition, by the yard Data are resided in internal memory.
- 3. according to the method for claim 1, it is characterised in that methods described also includes：When needing to carry out yard changing interface, if judging, to be switched station yard data is stored in internal memory, directly displays institute State station yard data；If judging, to be switched station yard data is stored in local hard drive, loads the station yard data, passes through specified data It is stored in internal memory and is shown after structure conversion.
- 4. according to the method for claim 1, it is characterised in that system data maintenance table is stored with internal memory, in the system The data hit rate of each station yard data, the display number of station yard data, data access times are stored with system data maintenance table And the display moment；The data time access times are that station yard data shows that number is loaded on the number of internal memory with station yard data Sum；The system data maintenance table also includes the call number or station yard data title and data storage shape of each station yard data State, the state data memory are used to describe the currently stored position of the station yard data.
- 5. according to the method for claim 4, it is characterised in that judge the storage location of to be switched station yard data, including：According to the call number of to be switched station yard data or station yard data title, looked into the system data maintenance table Look for；If record has the station yard data in the system data maintenance table, according to data storage corresponding to the station yard data State determines its storage location.
- 6. according to the method for claim 4, it is characterised in that methods described also includes：For each station yard data, after storage location change, it is corresponding to update the station yard data in the system data maintenance table State data memory.
- 7. according to the method for claim 4, it is characterised in that methods described also includes：After each station yard data is shown, data hit rate corresponding to the station yard data and the display moment are updated.
- 8. according to the method for claim 4, it is characterised in that methods described also includes：According to the state data memory of each station yard data in the system data maintenance table, if judging the station being stored in internal memory Field data reaches default storage cap, then is ranked up each station yard data being stored in internal memory by data hit rate, Hit rate is moved in caching less than the station yard data of specified threshold and stored.
- 9. according to the method for claim 4, it is characterised in that the data hit rate is calculated by equation below：The display number of data hit rate=station yard data/(data access times+1).
- 10. according to the method for claim 4, it is characterised in that during the data at the time of a length of current system with it is described Show the difference at moment.
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