CN107748652A - A kind of date storage method and device - Google Patents
A kind of date storage method and device Download PDFInfo
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- CN107748652A CN107748652A CN201711085632.2A CN201711085632A CN107748652A CN 107748652 A CN107748652 A CN 107748652A CN 201711085632 A CN201711085632 A CN 201711085632A CN 107748652 A CN107748652 A CN 107748652A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0608—Saving storage space on storage systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/061—Improving I/O performance
- G06F3/0611—Improving I/O performance in relation to response time
Abstract
The invention discloses a kind of date storage method and device, this method includes：The data at current time are obtained, and with different time unit, the index of default parameter in data and corresponding basic data are saved as into permanent data record, and preserve the flex point in data and recorded for permanent data.So, it is compressed equivalent to by data, no longer it is all to be stored all data received, without disposably asking all data from Cloud Server, but the index of correlation and jitter points for passing through data in the unit interval, to represent the situation of change of data in the unit interval, so reduce the amount of storage of data while ensure the higher reduction degree of data.Also, when carrying out data call, the response time of server is also reduced, improves inquiry and the efficiency rendered.
Description
Technical field
The present invention relates to field of data storage, more particularly to a kind of date storage method and device.
Background technology
As the continuous development of requirement more and more higher of the people for quality of life and science and technology, the application of Internet of Things are more next
It is more universal, such as intelligent domestic system, environmental monitoring, intelligent medical etc., Internet of Things is during use, it is necessary to continual
Gathered data, and by the data Cun Chudao servers collected.
This storage mode greatly consumes the memory space of server, moreover, working as needs to call some period
During data, because data volume is excessive, the corresponding overlong time of server can be caused.
The content of the invention
In view of this, the embodiment of the invention discloses a kind of date storage method and device, reduction data storage is realized
The purpose in space, also, due to reducing the memory space of data, when carrying out data call, shorten the response of server
Time.
A kind of date storage method disclosed in the embodiment of the present invention, including：
Obtain the data at current time；
The history desired value of parameter is corresponded to according to the data and the data, updates the current desired value of the parameter,
And according to the history flex point of parameter, bearing data described in the data and caching, judge whether the data are flex point data；
Judge whether current time has reached the current preservation moment；The current preservation moment is based on default input time
Determined with preset time unit；
If having reached the current preservation moment, the current desired value of the parameter and default first foundation data are entered
Row preserves；
If the data are flex point data, current flex point, the bearing data of the parameter are updated, and by the current flex point
Value, the current data change direction and default second basic data are preserved.
Optionally, the history desired value that parameter is corresponded to according to the data and the data, update the parameter and work as
Preceding desired value, including：
Judge whether the data are more than the history maximum of the parameter, if more than the history maximum of the parameter,
The current maximum of the parameter is updated to the data；
Judge whether the data are less than the history minimum value of the parameter, if less than the history minimum value of the parameter,
The current minimum value of the parameter is updated to the data；
According to the history average of the data and the parameter, the current average of the parameter is updated.
Optionally, it is described according to the history flex point of parameter, bearing data described in the data and caching, judge the number
According to whether being flex point data, including：
According to the data and the history flex point data of the parameter, the change direction of current data is determined；
Judge current data change direction and historical data change direction it is whether identical；
If the change direction of current data and the change direction of historical data differ, judge the absolute value of the data and be
It is no to have exceeded default dithering threshold；
If having exceeded default dithering threshold, it is flex point data to determine the data.
Optionally, in addition to：
Initialize the related data of the parameter；The related data of the parameter includes：At least one finger of the parameter
Mark, input time and current time；
Initialize the flex point record of the parameter；The flex point record includes：The change direction of knee value and data.
Optionally, the default chronomere is at least one chronomere.
Optionally, in addition to：
Receive data call request；
Determine the very first time unit in the data call request；
The data preserved with the very first time unit are sent to calling terminal, so that the calling terminal displays reception
The data arrived；
The data preserved with second chronomere are sent to calling terminal；Second chronomere is less than described
Very first time unit.
The embodiment of the invention also discloses a kind of data storage device, including：
Acquiring unit, for obtaining the data at current time；
Updating block, for corresponding to the history desired value of parameter according to the data and the data, update the parameter
Current desired value；
First judging unit, for according to the history flex point of parameter, bearing data described in the data and caching, judging
Whether the data are flex point data；
Second judging unit, for judging whether current time has reached the current preservation moment；The current preservation moment
It is to be determined based on default input time and preset time unit；
Data saving unit, if for having reached the current preservation moment, by the current desired value of the parameter and in advance
If first foundation data preserved；
Flex point storage unit, if being flex point data for the data, update current flex point, the direction number of the parameter
According to, and current knee value, the current data change direction and default second basic data are preserved.
Optionally, the updating block, including：
First renewal subelement, for judging whether the data are more than the history maximum of the parameter, if being more than institute
The history maximum of parameter is stated, the current maximum of the parameter is updated to the data；
Second renewal subelement, for judging whether the data are less than the history minimum value of the parameter, if being less than institute
The history minimum value of parameter is stated, the current minimum value of the parameter is updated to the data；
3rd renewal subelement, for the history average according to the data and the parameter, updates the parameter
Current average.
Optionally, first judging unit, including：
First determination subelement, for the history flex point data according to the data and the parameter, determine current data
Change direction；
First judgment sub-unit, for judge current data change direction and historical data change direction whether phase
Together；
Second judgment sub-unit, if being differed for the change direction of current data and the change direction of historical data, sentence
Whether the absolute value for the data of breaking has exceeded default dithering threshold；
Second determination subelement, if for having exceeded default dithering threshold, it is flex point data to determine the data.
Optionally, the default chronomere is at least one chronomere, in addition to：
Receiving unit, for receiving data call request；
Determining unit, for determining the very first time unit in the data call request；
First transmitting element, for the data preserved with the very first time unit to be sent into calling terminal, so that institute
State the data for calling terminal displays reception to arrive；
Second transmitting element, for the data preserved with second chronomere to be sent into calling terminal；Described
Two chronomeres are less than the very first time unit.
The embodiment of the invention discloses a kind of date storage method and device, this method includes：Receive the number at current time
According to；The history desired value of parameter is corresponded to according to the data and the data, updates the current desired value of the parameter, and foundation
The history flex point data of the data and the parameter, judge whether the data are flex point data；Whether judge current time
The current preservation moment is reached；The current preservation moment is determined based on default input time and preset time unit；If
The current preservation moment is reached, the current desired value of the parameter and default first foundation data has been preserved；If
The data are flex point data, update the current flex point record of the parameter, and will currently flex point data, the current number
Preserved according to change direction and default second basic data.It follows that the embodiment of the present invention can according to it is default when
Between unit the current desired value of the parameter and default first foundation data are saved in database, and determining flex point
After data, by flex point data Cun Chudao databases, equivalent to only preserved in database be each chronomere renewal
Data and flex point data, be no longer all data that real-time reception arrives, so reduce the memory data output of server, and
And when carrying out data call, also shorten the response time of server.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 shows a kind of schematic flow sheet of date storage method provided in an embodiment of the present invention；
Fig. 2 shows that data transfer the schematic flow sheet of method；
Fig. 3 shows a kind of structural representation of data storage device provided in an embodiment of the present 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.
With reference to figure 1, a kind of schematic flow sheet of date storage method provided in an embodiment of the present invention is shown, in this implementation
In example, this method includes：
S101：Obtain the data at current time；
In the present embodiment, in order to ensure the timing of data, the number at current time can be obtained from fifo queue
According to.
S102：The history desired value of parameter is corresponded to according to the data and the data, updates the current finger of the parameter
Scale value；
In the present embodiment, Internet of Things can apply to many fields, such as smart home, environmental monitoring etc., therefore, service
The data that device receives can include it is a variety of, in this embodiment, represent that every kind of data, such as parameter can include by parameter：
Temperature, pressure, air quality data etc..
Before S102 is performed, it can be included with the related data of initiation parameter, related data：At least the one of the parameter
Individual index, input time and current time etc., wherein, the index of parameter includes：Maximum, minimum value and average value etc., for example,
Maximum and minimum value can be initialized as zero.
Wherein, the related data of the parameter initialization can preserve in the buffer, current when being taken out from fifo queue
The data at moment, the related data in caching is updated, it is necessary to update the data including：Maximum, minimum value and current
Time etc.；Wherein, the desired value being directed in renewal related data, specifically, can include：
Judge whether the data are more than the history maximum of the parameter, if more than the history maximum of the parameter,
The current maximum of the parameter is updated to the data；
Judge whether the data are less than the history minimum value of the parameter, if less than the history minimum value of the parameter,
The current minimum value of the parameter is updated to the data；
According to the history average of the data and the parameter, the current average of the parameter is updated.
The caching can be realized by using the fifo queue of first in first out, preferred Redis teams in the embodiment of the present invention
Row.In order to more clearly show technical scheme, following examples it is more with Redis queues as an example, but
Technical scheme is in the specific implementation, however it is not limited to the various instruments or form for realizing caching.
In the present embodiment, data and the maximum of parameter preset, minimum value that current time is received are compared, if
The data that current time receives are bigger than the maximum of the parameter, then maximum are updated into latest data, if current data ratio
The minimum value of the parameter is small, then minimum value is updated into current data；, should if current data is less than or equal to the maximum of the parameter
The maximum of parameter is constant, if current data is more than or equal to the minimum value of the parameter, the minimum value of the parameter is also constant.
S103：Judge whether current time has reached the current preservation moment；The current preservation moment is based on default defeated
Enter what moment and preset time unit determined；
By foregoing description, before S102 is performed, input time is initialized, but pass through a time list
Behind position, input time can be updated to the time at current time.
In the present embodiment, chronomere can be understood as a default time interval, if for example, chronomere is 1 small
When, then it is a chronomere that chronomere, which can be understood as every 1 hour,.
Wherein, currently preserve the moment it is to be understood that default input time after default chronomere when
Carve, such as：If default input time is 13 points, default chronomere is 1 hour, then it is 14 points currently to preserve the moment.
S104：If the current preservation moment is reached, by the current desired value of the parameter and default first foundation
Data are preserved.
In the present embodiment, S104 is equivalent to each chronomere will insert a record, the record in database
Including：The current desired value of the parameter and default first foundation data.Wherein, first foundation data can include：Adaptation
Device ID, parameter, the chronomere used, renewal time etc..
For example, if chronomere is 1 hour, input time is start time, then the time of one after start time hour
In unit, the data in Redis lists will be updated in real time, but after reaching one hour, that is, be reached after preserving the moment, be needed
Maximum in Redis lists, minimum value, average value and default basic data are stored in database, specifically, protecting
The data deposited can be shown in following table one：
Table 1
| Adapter id | Parameter | Chronomere | Maximum | Minimum value | Average value | Time |
| aprusid | Temperature | time_unit | Max | min | avg | datetime |
| * | * | * (chronomere) | * | * | * | * |
It is understood that Redis lists do not store data into data equivalent to data are carried out with interim caching
In storehouse, S101~S104 equivalent to data processing procedure, often by a chronomere, by the dependency number in Redis lists
According to preservation once.
In the present embodiment, in order to which user is when carrying out data call, the number of multiple chronomeres can be observed in real time
According to situation of change, multiple chronomeres can be used simultaneously, data are stored.
In the present embodiment, when receiving the data at current time, according to the data received, it is corresponding to update the data
Parameter current criteria value, and after the preservation moment has been reached, by the current criteria value of renewal and default first foundation number
According to being preserved.So, a current criteria value and first foundation data are preserved equivalent to each chronomere, it is therefore not necessary to
All data are stored again, save the memory space of server；And when reported data amount is very huge beyond the clouds,
Use and important critical data is saved with upper type, can also ensure the higher reduction degree of data simultaneously, be easy to follow-up big data should
With extension.
In the present embodiment, after S101 is performed, except needing the data according to the current time received to correspond to
The desired value of parameter is updated, while also needs to judge whether the data that current time receives are flex point, specifically, such as with
Under step S105：
S105：According to the history flex point of parameter, bearing data described in the data and caching, whether the data are judged
For flex point data；
Due to the data that finally store, it is necessary to reflect the situation of change of data, the only maximum including data, minimum value
And average value, it is impossible to the situation of change of comprehensive reflection data, therefore, it is also desirable to know the variation tendency of data, therefore, also need
Whether the data for determining to receive are flex point data, specifically, including：
According to the data and the history flex point data of the parameter, the change direction of current data is determined；
Judge current data change direction and historical data change direction it is whether identical；
If the change direction of current data and the change direction of historical data differ, judge the absolute value of the data and be
It is no to have exceeded default dithering threshold；
If having exceeded default dithering threshold, it is flex point data to determine the data.
In the present embodiment, before S105 is performed, in addition to：Initialize the flex point data of the parameter；The flex point number
According to including：The change direction of knee value and data.
Wherein, flex point data can be stored in Redis lists, in Redis lists, often receive a data, all
First to judge whether it is flex point data, if flex point data, then the flex point data preserved in Redis lists be carried out more
Newly.
For example, the knee value and data change direction of initialization can be 0；If data variation trend is rises, then
Change direction can be+1, if data variation trend is declines, change direction can be -1., it is necessary to illustrate in the present embodiment
, history flex point data can be understood as last moment renewal flex point data.
In the present embodiment, the determination of flex point data includes two qualifications, and condition one is：The data that are currently received and
History flex point data are compared, and change direction is in opposite direction with historical variations；Condition two：The data that current time receives are more than pre-
If tolerance threshold value.
Because the change of data has a scope that can be fluctuated, in controllable scope, then the data cannot function as
Flex point, if data are defined as flex point data beyond controllable scope, the data.The controlled range of the data is set as tolerance
Threshold value is spent, the tolerance threshold value can be that technical staff is rule of thumb set, or be calculated by analysis, if doubtful
For flex point data beyond tolerance threshold value, then the data being currently received are flex point data, even more than tolerance threshold value, are then existed
The data being currently received are updated as new flex point data in caching.
Illustrate：Assuming that the shake tolerance pre-set is 0.5, the flex point preserved in caching is 1.9, the side of preservation
To for rise.If the data being currently received are 1.1, the direction of current data is first determined whether, by calculating 1.1-1.9=-
0.8, therefore outgoing direction is judged to decline, it is seen that when front direction, front direction is opposite therewith；Then judge that current data turns with history
Whether the absolute value of point is more than shake tolerance, due to absolute value | and -0.8 |>0.5, therefore will should currently receive in the buffer
The data 1.1 arrived are updated as new flex point data, and direction is updated to decline.
Another illustration：When knee value is 32 DEG C in history flex point data, change direction is+1, if current time receives
The data arrived are 22 DEG C, then compared with 32 DEG C, current change direction is declines, due to the change preserved in history flex point data
Direction is rises, it is determined that the current data received is doubtful flex point.Assuming that tolerance threshold value is 30 DEG C, then doubtful flex point data
For knee value, i.e., in the buffer, the data being currently received are preserved as flex point and preserve direction to decline.
S106：If the data are flex point data, current flex point, the bearing data of the parameter are updated, and described will work as
Preceding knee value, the current data change direction and default second basic data are preserved.
In the present embodiment, S105~S106 be can be understood as often detecting flex point data, and a note is inserted in database
Record, the record include：Current flex point data, the current data change direction and default second basic data are preserved.
Illustrate：Second basic data can include：Adapter ID, parameter, change direction and renewal time, specifically
, flex point data can be with as shown in table 2 below：
Table 2
| Adapter id | key | Chronomere | Currently | Direction | Time |
| aprusid | Temperature | time_unit | current | arrow | datetime |
| * | * | inflexion | * | * | * |
In the present embodiment, each flex point occurred in the data of reception is recorded so that user can more comprehensively understand
The situation of change of data.
When user needs to be shown the data received, can be asked to system server with any time
Unit is shown to data, and with reference to figure 2, the implementation procedure of system server includes：
S201：Receive data call request；
S202：Determine the very first time unit in the data call request；
S203：The data preserved with the very first time unit are sent to calling terminal, connect so as to call terminal to show
The data received；
S204：The data preserved with second chronomere are sent to calling terminal；Second chronomere is small
In the very first time unit.
Illustrate：When user needs display 12 small during the data of unit, call request is sent to system server, is
The data of 12 hours units are sent to display terminal by system server.It is assumed that the chronomere preserved in system server includes：
12 hours, 8 hours, 1 hour and 0.5 hour, then the future time unit of 12 hours is 8 hours, and display terminal was by this 12 hours
After the data of unit are shown, system server, which can preserve 8 hours in case calling as front end data, to be showed.It is assuming that aobvious
Show terminal with 8 hours for the data of chronomere after, 1 hour data for chronomere is sent to data end by system server
End.
Wherein, when carrying out data display, data can be shown using multiple types of tools, such as Echart can be used
The mode of K line charts is shown.
In the present embodiment, user can be by dragging mouse, and by view zoom, the time equivalent to switching display is single
Position.Such as：If starting the chronomere of 12 hours of selection, mouse is dragged, view is amplified, it is chronomere to show 8 hours
Data.
In the present embodiment, because system server stores according to multiple chronomeres to data, moreover, to every
The data of individual chronomere's storage are data after treatment, reduce the memory space of data, are so carrying out data tune
Used time, improve the reaction speed of data call.
With reference to figure 3, a kind of structural representation of data storage device provided in an embodiment of the present invention is shown, in this implementation
In example, the device includes：
Acquiring unit 301, for obtaining the data at current time；
Updating block 302, for corresponding to the history desired value of parameter according to the data and the data, update the ginseng
The current desired value of number；
First judging unit 303, for according to the history flex point of parameter, bearing data described in the data and caching,
Judge whether the data are flex point data；
Second judging unit 304, for judging whether current time has reached the current preservation moment；During the current preservation
Quarter is determined based on default input time and preset time unit；
Data saving unit 305, if for reached it is described it is current preserve the moment, by the current desired value of the parameter and
Default first foundation data are preserved；
Flex point storage unit 306, if being flex point data for the data, update current flex point, the direction of the parameter
Data, and current knee value, the current data change direction and default second basic data are preserved.
Optionally, the updating block, including：
First renewal subelement, for judging whether the data are more than the history maximum of the parameter, if being more than institute
The history maximum of parameter is stated, the current maximum of the parameter is updated to the data；
Second renewal subelement, for judging whether the data are less than the history minimum value of the parameter, if being less than institute
The history minimum value of parameter is stated, the current minimum value of the parameter is updated to the data；
3rd renewal subelement, for the history average according to the data and the parameter, updates the parameter
Current average.
Optionally, first judging unit, including：
First determination subelement, for the history flex point data according to the data and the parameter, determine current data
Change direction；
First judgment sub-unit, for judge current data change direction and historical data change direction whether phase
Together；
Second judgment sub-unit, if being differed for the change direction of current data and the change direction of historical data, sentence
Whether the absolute value for the data of breaking has exceeded default dithering threshold；
Second determination subelement, if for having exceeded default dithering threshold, it is flex point data to determine the data.
Optionally, default chronomere is at least one chronomere, in addition to：
Receiving unit, for receiving data call request；
Determining unit, for determining the very first time unit in the data call request；
First transmitting element, for the data preserved with the very first time unit to be sent into calling terminal, so that institute
State the data for calling terminal displays reception to arrive；
Second transmitting element, for the data preserved with second chronomere to be sent into calling terminal；Described
Two chronomeres are less than the very first time unit.
By the device of the present embodiment, by the current desired value of the parameter and can be preset according to default chronomere
First foundation data be saved in database, and after flex point data are determined, by flex point data Cun Chudao databases, phase
When only preserved in database be each chronomere renewal data and flex point data, be no longer that real-time reception arrives
All data, the memory data output of server is so reduced, also, when carrying out data call, also shorten server
Response time, improve inquiry and rendering efficiency.And when reported data amount is very huge beyond the clouds, uses and protected with upper type
Deposit important critical data, can also ensure the higher reduction degree of data simultaneously, be easy to follow-up big data application.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation is all difference with other embodiment, between each embodiment identical similar part mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (10)
- A kind of 1. date storage method, it is characterised in that including：Obtain the data at current time；The history desired value of parameter is corresponded to according to the data and the data, updates the current desired value of the parameter, and according to According to the history flex point of parameter, bearing data described in the data and caching, judge whether the data are flex point data；Judge whether current time has reached the current preservation moment；It is described that current to preserve the moment be based on default input time and pre- What if chronomere determined；If having reached the current preservation moment, the current desired value of the parameter and default first foundation data are protected Deposit；If the data are flex point data, update current flex point, the bearing data of the parameter, and by the current knee value, The current data change direction and default second basic data are preserved.
- 2. according to the method for claim 1, it is characterised in that described to correspond to parameter according to the data and the data History desired value, the current desired value of the parameter is updated, including：Judge whether the data are more than the history maximum of the parameter, if more than the history maximum of the parameter, by institute The current maximum for stating parameter is updated to the data；Judge whether the data are less than the history minimum value of the parameter, if less than the history minimum value of the parameter, by institute The current minimum value for stating parameter is updated to the data；According to the history average of the data and the parameter, the current average of the parameter is updated.
- 3. according to the method for claim 1, it is characterised in that the going through according to parameter described in the data and caching History flex point, bearing data, judge whether the data are flex point data, including：According to the data and the history flex point data of the parameter, the change direction of current data is determined；Judge current data change direction and historical data change direction it is whether identical；If the change direction of current data and the change direction of historical data differ, judge whether the absolute value of the data surpasses Default dithering threshold is crossed；If having exceeded default dithering threshold, it is flex point data to determine the data.
- 4. according to the method for claim 1, it is characterised in that also include：Initialize the related data of the parameter；The related data of the parameter includes：It is at least one index of the parameter, defeated The angle of incidence and current time；Initialize the flex point record of the parameter；The flex point record includes：The change direction of knee value and data.
- 5. according to the method for claim 1, it is characterised in that the default chronomere is that at least one time is single Position.
- 6. according to the method for claim 5, it is characterised in that also include：Receive data call request；Determine the very first time unit in the data call request；The data preserved with the very first time unit are sent to calling terminal, so that described call what terminal displays reception arrived Data；The data preserved with second chronomere are sent to calling terminal；Second chronomere is less than described first Chronomere.
- A kind of 7. data storage device, it is characterised in that including：Acquiring unit, for obtaining the data at current time；Updating block, for corresponding to the history desired value of parameter according to the data and the data, it is current to update the parameter Desired value；First judging unit, for according to the history flex point of parameter, bearing data described in the data and caching, described in judgement Whether data are flex point data；Second judging unit, for judging whether current time has reached the current preservation moment；The current preservation moment is base Determined in default input time and preset time unit；Data saving unit, if for reached it is described it is current preserve the moment, by the current desired value of the parameter and default First foundation data are preserved；Flex point storage unit, if being flex point data for the data, current flex point, the bearing data of the parameter are updated, and Current knee value, the current data change direction and default second basic data are preserved.
- 8. device according to claim 7, it is characterised in that the updating block, including：First renewal subelement, for judging whether the data are more than the history maximum of the parameter, if being more than the ginseng Several history maximums, the current maximum of the parameter is updated to the data；Second renewal subelement, for judging whether the data are less than the history minimum value of the parameter, if being less than the ginseng Several history minimum values, the current minimum value of the parameter is updated to the data；3rd renewal subelement, for the history average according to the data and the parameter, updates the current of the parameter Average value.
- 9. device according to claim 7, it is characterised in that first judging unit, including：First determination subelement, for the history flex point data according to the data and the parameter, determine the change of current data Change direction；First judgment sub-unit, for judge current data change direction and historical data change direction it is whether identical；Second judgment sub-unit, if being differed for the change direction of current data and the change direction of historical data, judge institute Whether the absolute value for stating data has exceeded default dithering threshold；Second determination subelement, if for having exceeded default dithering threshold, it is flex point data to determine the data.
- 10. device according to claim 7, it is characterised in that the default chronomere is that at least one time is single Position, in addition to：Receiving unit, for receiving data call request；Determining unit, for determining the very first time unit in the data call request；First transmitting element, for the data preserved with the very first time unit to be sent into calling terminal, so that the tune The data arrived with terminal displays reception；Second transmitting element, for the data preserved with second chronomere to be sent into calling terminal；When described second Between unit be less than the very first time unit.
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