CN109856651A - A kind of position data compression method and system based on dipper system - Google Patents
A kind of position data compression method and system based on dipper system Download PDFInfo
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- 238000013144 data compression Methods 0.000 title claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 97
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- 238000007906 compression Methods 0.000 claims abstract description 55
- 230000006835 compression Effects 0.000 claims abstract description 55
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- 230000004048 modification Effects 0.000 claims abstract description 36
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Abstract
The invention discloses a kind of position data compression method based on dipper system, it include: S1, successively obtain at least two position datas, wherein, the position data of first acquisition is the first position data, and each position data include longitude information, latitude information, velocity information, elevation information, directional information and temporal information；S2 carries out compression processing to position data respectively；S3 arranges the position data after compression processing；Wherein, the step S2 includes: to carry out digit modification and system conversion process to longitude information and latitude information；System conversion process is carried out to velocity information, elevation information and directional information；Processing is formatted to temporal information.The invention also discloses a kind of position data compressibility based on dipper system, comprising: receiving module, compressing processing module and arrangement module.More information amount can be transmitted in existing Beidou generation communication system under the limitation of transmission frequency and conveying length using the present invention.
Description
Technical field
The present invention relates to a kind of wireless communication technique more particularly to a kind of position data compression methods based on dipper system
And system.
Background technique
Beidou satellite navigation system is the Global Satellite Navigation System that China voluntarily develops, in addition to having positioning, navigating, award
The functions such as Shi Gongneng, the communication of two-way short message, have important application in the activity such as rescue and relief work, geophysical surveying, oceangoing voyage
Value.
Big-dipper satellite precise positioning is most common function in Beidou communication system, and a complete position data includes position
Longitude, latitude, elevation, speed, direction and positioning time are set, his initial data size is 59byte.A Beidou generation at present
Inside the transmission mechanism of communication system, the transmission frequency of 60 seconds and 30 seconds frequency can be divided into, the overwhelming majority can only make on the market
With 60 seconds transmission frequency, i.e., every 60 seconds equipment can only issue a short message data, and a short message data most greatly enhance
Degree is no more than 78Byte, and for common language, 78Byte can only send out 39 Chinese characters.
From the point of view of the transmission length limitation of 78byte, it is meant that each minute equipment can only at most upload no more than 1 position
Information a little is set, for vehicle monitoring, ship monitor, the high-precision application scenarios of outdoor these frequent of race, can not also be expired
Foot.
So a technical solution is provided, in existing Beidou generation communication system to the limit of transmission frequency and conveying length
Under system, more information content can be transmitted, are current problems to be solved.
Summary of the invention
Technical problem to be solved by the present invention lies in, provide a kind of position data compression method based on dipper system and
System can transmit more information content in existing Beidou generation communication system under the limitation of transmission frequency and conveying length.
In order to solve the above technical problem, the present invention provides a kind of position data compression method based on dipper system,
It is characterized in that, comprising: S1 successively obtains at least two position datas, wherein the position data of first acquisition is the first position
Data, each position data include longitude information, latitude information, velocity information, elevation information, directional information and time letter
Breath；S2 carries out compression processing to position data respectively；S3 arranges the position data after compression processing；Wherein, step
S2 includes: to carry out digit modification and system conversion process to longitude information and latitude information；To velocity information, elevation information and side
System conversion process is carried out to information；Processing is formatted to temporal information.
As an improvement of the above scheme, the step of carrying out digit modification processing to longitude information and latitude information includes: to repair
Change longitude information, so that longitude information retains the decimal of presetting digit capacity；Latitude information is modified, so that latitude information retains default position
Several decimals.
As an improvement of the above scheme, the step of carrying out system conversion process to longitude information and latitude information includes: pair
Longitude information and latitude information carry out hexadecimal conversion respectively.
As an improvement of the above scheme, the step of system conversion process is carried out to velocity information, elevation information and directional information
It suddenly include: that hexadecimal conversion is carried out respectively to velocity information, elevation information and directional information.
As an improvement of the above scheme, temporal information includes date information and temporal information；Format is carried out to temporal information
The step of changing processing includes: the front two number for deleting date information in the first position data；Delete the day in other positions data
Phase information.
The invention also discloses a kind of position data compressibility based on dipper system, comprising: receiving module, for according to
At least two position datas of secondary acquisition, wherein the position data of first acquisition is the first position data, and each position data are equal
Including longitude information, latitude information, velocity information, elevation information, directional information and temporal information；Compressing processing module is used for
Compression processing is carried out to position data respectively；Module is arranged, for arranging the position data after compression processing；Wherein,
Compressing processing module includes: longitude and latitude compression unit, for carrying out digit modification and system turn to longitude information and latitude information
Change processing；It is fast high to compression unit, for carrying out system conversion process to velocity information, elevation information and directional information；Time
Compression unit, for being formatted processing to temporal information.
As an improvement of the above scheme, longitude and latitude compression unit includes: longitude digit modification subelement, for modifying longitude
Information, so that longitude information retains the decimal of presetting digit capacity；Latitude digit modifies subelement, for modifying latitude information, so that
The decimal of latitude information reservation presetting digit capacity.
As an improvement of the above scheme, longitude and latitude compression unit further include: longitude and latitude system conversion subunit, for warp
Degree information and latitude information carry out hexadecimal conversion respectively.
As an improvement of the above scheme, speed height includes: fast height to system conversion subunit to compression unit, is used for speed
Information, elevation information and directional information carry out hexadecimal conversion respectively.
As an improvement of the above scheme, temporal information includes date information and temporal information；Time compression unit includes: head
The position time compresses subelement, for deleting the front two number of date information in the first position data；Other times compress subelement,
For deleting the date information in other positions data.
The invention has the following beneficial effects:
The present invention is based on the position data compression method of dipper system in existing Beidou generation communication system to transmission frequency
And under the limitation of conveying length, more information content can be transmitted.
Specifically, the present invention is for carrying out compression processing the characteristics of every terms of information in position data.For in addition to the time
Other information outside information, such as longitude information, latitude information, velocity information, elevation information, by above- mentioned information carry out 16 into
System conversion, to be compressed to above- mentioned information.Simultaneously as the decimal of longitude information and latitude information is more, to longitude information
And before latitude information carries out hexadecimal conversion, the modification of fractional digit is first carried out, retains preset quantity decimal, for example only protect
7 decimals are stayed, then carry out hexadecimal conversion again, further compress longitude information and latitude information.For temporal information, by
In temporal information include date information and temporal information.Leave out the date information front two of the first position data, because this two
It is the front two " 20 " of the time part of date information, for all position datas, which is fixed, therefore can
To delete.In addition, it can be deleted since the date information of all position datas in a short message is all consistent
The date information of his position data, thus further compression time information.It, can be according to the first position after user receives short message
The date information of data determines the date informations of other positions data.After carrying out above-mentioned compression processing, by position data into
Row arrangement, is sent as a short message, and after compression, a short message may include most four position datas, from
And in existing transmission frequency and under sending length limitation, send more information content.
Position data compressibility disclosed by the invention based on dipper system is able to achieve above-mentioned position data compression method,
So that more information content can be transmitted under the limitation of transmission frequency and conveying length in existing Beidou generation communication system.
Detailed description of the invention
The present invention is based on the position data compression method flow chart of first embodiment of dipper system by Fig. 1；
The present invention is based on the position data compression method flow chart of the second embodiment of dipper system by Fig. 2；
The present invention is based on the position data compression method 3rd embodiment flow charts of dipper system by Fig. 3；
The present invention is based on the position data compression method fourth embodiment flow charts of dipper system by Fig. 4；
The present invention is based on the 5th embodiment flow charts of position data compression method of dipper system by Fig. 5；
The present invention is based on the position data compression method sixth embodiment flow charts of dipper system by Fig. 6；
The present invention is based on the position data compressibility schematic structural diagram of the first embodiment of dipper system by Fig. 7；
The present invention is based on the position data compressibility schematic structural diagram of the second embodiment of dipper system by Fig. 8；
The present invention is based on the position data compressibility 3rd embodiment structural schematic diagrams of dipper system by Fig. 9；
The present invention is based on the position data compressibility fourth embodiment structural schematic diagrams of dipper system by Figure 10；
The present invention is based on the 5th example structure schematic diagrams of position data compressibility of dipper system by Figure 11.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.Only this is stated, the present invention occurs in the text or will occur up, down, left, right, before and after, it is inside and outside etc. just
Position word is not to specific restriction of the invention only on the basis of attached drawing of the invention.
Fig. 1 shows the position data compression method flow chart of first embodiment the present invention is based on dipper system, comprising:
S101, at least two position datas are successively obtained；
The position data of first acquisition is the first position data.Due to successively obtaining at least two position datas,
When carrying out compression processing to position data, it can only retain the first position data content identical with other positions data, such as day
Then phase information deletes other positions data related content identical with the first position data.It can be also by the first position data
Original, which goes out, is deleted content in other positions data.
Each position data include longitude information, latitude information, velocity information, elevation information, directional information and time
Information.Position data not only include it is various can determine that positioning target real time position information, as longitude information, latitude information,
Elevation information and temporal information further comprise the information that can determine that positioning target state, such as velocity information, directional information.
Although user not necessarily will use all information sometimes, in order to meet the needs of different users, a complete position data
It all should include above-mentioned all information, with the information of comprehensive reflection positioning target.Position data is simplified, cannot be deleted
Any of the above information, can only be according to different information the characteristics of, carry out under the premise of not influencing information content that information includes
The processing such as system conversion, modification, achieve the effect that compression position data.
S102, compression processing is carried out to position data respectively；
S103, the position data after compression processing is arranged.
After carrying out above-mentioned compression processing, position data is arranged.Multiple position datas after arrangement can be used as
One short message is sent, and a short message at most may include four position datas, in this way, in existing transmission frequency and hair
It send under length limitation, more information content can be sent.
Above-mentioned steps are further qualified below.
Fig. 2 shows the position data compression method flow chart of the second embodiment the present invention is based on dipper system comprising:
S201, at least two position datas are successively obtained；
S202, digit modification and system conversion process are carried out to longitude information and latitude information；
S203, system conversion process is carried out to velocity information, elevation information and directional information；
S204, processing is formatted to temporal information；
S205, the position data after compression processing is arranged.
It should be noted that S202 to S204 in second embodiment in first embodiment " respectively to position data into
The step of row compression processing ", has made specific restriction.The restriction is according to being designed the characteristics of every terms of information in position data.
For the other information in addition to temporal information, the conversion process of higher system can be carried out, for example carries out hexadecimal conversion,
In the longitude information and latitude information more for decimal, decimal digits modification processing can also be carried out.For temporal information, by
Stringent numerical value in the information, should not carry out decimal digits modification and system conversion, but can by format handle into
Row compression.
Fig. 3 shows the position data compression method 3rd embodiment flow chart the present invention is based on dipper system comprising:
S301, at least two position datas are successively obtained；
S302, modification longitude information, so that longitude information retains the decimal of presetting digit capacity；
S303, modification latitude information, so that latitude information retains the decimal of presetting digit capacity；
S304, system conversion process is carried out to longitude information and latitude information；
S305, system conversion process is carried out to velocity information, elevation information and directional information；
S306, processing is formatted to temporal information；
S307, the position data after compression processing is arranged.
It should be noted that S302 and S303 in 3rd embodiment in second embodiment " to longitude information and latitude
The step of information progress digit modification ", has done specific restriction.The restriction is equal according to longitude information in dipper system and latitude information
The characteristics of having 15 decimals, is designed.It is small why dipper system sets so multidigit to longitude information and latitude information
Number is since on earth, once, span just has tens kilometers or even kilometer up to a hundred for longitude or the every variation of latitude.Therefore, must
Palpus longitude information and latitude information need to be accurate to the decimal ability accurate description longitude and latitude of the latter positioning number of decimal point, guarantee
Setting accuracy.But 15 decimals undoubtedly make longitude information and latitude information occupy excessive numerical digit space, have
In the case of it is practical do not need 15 decimals yet and can accurately be positioned yet, for example carried out in positioning target with fast speed
When mobile, decimal can be suitably reduced.How much user can be according to their needs to retaining longitude information and latitude information
Position decimal is preset, to reduce the decimal digits of longitude information and latitude information while not influencing setting accuracy.
For example decimal digits modification is carried out to longitude information 113.219379271322323 and latitude information 32.219379271322323
Processing is preset and retains 7 decimals, then longitude information is 113.2193792 after modifying, latitude information 32.2193792.
Fig. 4 shows the fourth embodiment flow chart of the position data compression method the present invention is based on dipper system, with
Three embodiments have been made defined below compared to fourth embodiment:
S401, at least two position datas are successively obtained；
S402, modification longitude information, so that longitude information retains the decimal of presetting digit capacity；
S403, modification latitude information, so that latitude information retains the decimal of presetting digit capacity；
S404, hexadecimal conversion is carried out respectively to longitude information and latitude information；
S405, system conversion process is carried out to velocity information, elevation information and directional information；
S406, processing is formatted to temporal information；
S407, the position data after compression processing is arranged.
It should be noted that S404 in fourth embodiment in 3rd embodiment " to longitude information and latitude information into
The step of traveling conversion process ", has done specific restriction.Decimal digits modification processing is being carried out to longitude information and latitude information
Afterwards, system conversion can be carried out to two information.Longitude information and latitude information are all decimal values, should be two information
The conversion for carrying out higher system, as the most commonly used is hexadecimals in computer science.When conversion, to be simplified, first remove small
It is several, hexadecimal conversion is carried out using longitude information and latitude information as integer.Other terminals are right after receiving short message
Longitude information and latitude information carry out inverse conversion, i.e., after decimal system conversion, further according to the information after restoring divided by 10n, wherein n
The decimal digits that longitude information and latitude information are retained for user.
For example system conversion processing is carried out to longitude information 113.2193792 and latitude information 32.2193792, it removes small
Hexadecimal conversion is carried out after several points, longitude information is converted into " 437BE800 ", latitude information by " 1132193792 "
" 322193792 " are converted into " 13344980 ".User carries out decimal system conversion after receiving above- mentioned information, also by longitude information
Originally it was " 1132193792 ", latitude information is reduced to " 322193792 ".Retain since longitude information and latitude information are default
Longitude information " 1132193792 " and latitude information can be restored longitude letter respectively divided by 10000000 respectively by 7 decimals
The raw value " 113.2193792 " of breath and the raw value " 32.2193792 " of latitude information.
Fig. 5 shows the 5th embodiment flow chart of the position data compression method the present invention is based on dipper system, with
Four embodiments have been made defined below compared to the 5th embodiment:
S501, at least two position datas are successively obtained；
S502, modification longitude information, so that longitude information retains the decimal of presetting digit capacity；
S503, modification latitude information, so that latitude information retains the decimal of presetting digit capacity；
S504, hexadecimal conversion is carried out respectively to longitude information and latitude information；
S505, hexadecimal conversion is carried out respectively to velocity information, elevation information and directional information；
S506, processing is formatted to temporal information；
S507, the position data after compression processing is arranged.
It should be noted that S505 in the 5th embodiment in fourth embodiment " to velocity information, elevation information and side
To information carry out system conversion process " the step of done specific restriction.The decimal of velocity information, elevation information and directional information is not
It is more, digit modification should not be carried out to the fractional part of information, but system conversion can be carried out to these three information, such as three
Information is converted into hexadecimal.When conversion, to be simplified, decimal point is first removed, velocity information, elevation information and direction are believed
Breath carries out hexadecimal conversion as integer.Other terminals are after receiving short message, to velocity information, elevation information and direction
Information carries out inverse conversion, i.e., after decimal system conversion, then by the information after reduction divided by 10n, wherein n be user to velocity information,
Elevation information and the default decimal digits retained of directional information.
For example be 23.42 (meter per seconds) to velocity information, elevation information is 4221 (rice), and directional information is 132 (degree) progress
Hexadecimal conversion, first remove decimal point, using three information as integer progress hexadecimal conversion, i.e., by velocity information by
" 2342 " are converted into " 0926 ", and elevation information " 4221 " is converted into " 107D ", and directional information is converted into " 0084 " by " 132 ".With
Family carries out decimal system conversion after receiving velocity information, elevation information and directional information, and velocity information is reduced to " 2342 ",
Elevation information is reduced to " 4221 ", directional information is reduced to " 132 ".Due to velocity information retain 2 decimals, other two
Information does not retain decimal, therefore velocity information " 2342 " is obtained velocity information raw value " 23.42 " divided by " 100 ", will be high
Elevation information raw value " 4221 " are obtained divided by " 1 " after degree information " 4221 ", will be obtained after directional information " 132 " divided by " 1 "
Directional information raw value " 132 ".
Fig. 6 shows the sixth embodiment flow chart of the position data compression method the present invention is based on dipper system, with
Five embodiments have been made defined below compared to sixth embodiment:
S601, at least two position datas are successively obtained；
S602, modification longitude information, so that longitude information retains the decimal of presetting digit capacity；
S603, modification latitude information, so that latitude information retains the decimal of presetting digit capacity；
S604, hexadecimal conversion is carried out respectively to longitude information and latitude information；
S605, hexadecimal conversion is carried out respectively to velocity information, elevation information and directional information；
S606, the front two number for deleting date information in the first position data；
Date information in S607, deletion other positions data；
S608, the position data after compression processing is arranged.
It should be noted that the S606 and S607 in sixth embodiment " carry out lattice to temporal information in the 5th embodiment
The step of formulaization processing ", has done specific restriction, and limit simultaneously: temporal information includes date information and temporal information.Above-mentioned restriction
It is that the very short feature of positioning intervals is designed according to receiving at least two position data, and in practicing.Due to one short
The difference of the temporal information of different location data is generally exactly temporal information in message, and date information does not have difference, can only be protected
The date information for staying the first position data leaves out the date information of other positions data.Other terminals after receiving short message,
The date information of other positions data can be restored according to the date information of the first position data.In addition, the first position data
The front two number " 20 " of date information, is fixed and invariable, therefore the two digits can be deleted.
For example 2 position datas are received, and it is first position data and second position data respectively, first position data,
The temporal information of i.e. the first position data is 20190101102123, and 21 divide 23 when the time of expression is 1 day 10 January in 2019
Second, the temporal information of second position data is 20190101102124, and 21 divide 24 when the time of expression is 1 day 10 January in 2019
Second.After being handled according to above-mentioned formatization rule, first position data time information is converted to 190101102123, second position number
102124 are converted to according to temporal information.
From the foregoing, it will be observed that the present invention is based on the position data compression method of dipper system, in existing Beidou generation communication system
To under the limitation of transmission frequency and conveying length, more information content can be transmitted.
Fig. 7 shows the structural schematic diagram of the position data compressibility first embodiment the present invention is based on dipper system,
Include:
Receiving module 10, for successively obtaining at least two position datas.
The position data of first acquisition is the first position data.Since receiving module 10 successively obtains at least two
Data are set, when other function module carries out compression processing to position data, can only retain the first position data and other positions
The identical content of data is set, then such as date information deletes other positions data related content identical with the first position data.
After other terminals receive short message, it can be restored by the first position data and be deleted content in other positions data.
Each position data include longitude information, latitude information, velocity information, elevation information, directional information and time
Information.Position data not only include it is various can determine that positioning target real time position information, as longitude information, latitude information,
Elevation information and temporal information further comprise the information that can determine that positioning target state, such as velocity information, directional information.
Although user not necessarily will use all information sometimes, in order to meet the needs of different users, a complete position data
It all should include above-mentioned all information, with the information of comprehensive reflection positioning target.Position data is simplified, cannot be deleted
Any of the above information, can only be according to different information the characteristics of, carry out under the premise of not influencing information content that information includes
The processing such as system conversion, decimal digits modification, achieve the effect that compression position data.
Compressing processing module 20, for carrying out compression processing to position data respectively.
Compressing processing module 20 specifically includes:
Longitude and latitude compression unit 21, for carrying out digit modification and system conversion process to longitude information and latitude information；
It is fast high to compression unit 22, for carrying out system conversion process to velocity information, elevation information and directional information；
Time compression unit 23, for being formatted processing to temporal information.
It should be noted that above-mentioned functional module is according to being designed the characteristics of every terms of information in position data.It is right
In the other information in addition to temporal information, compressing processing module 20 can carry out the conversion process of higher system, for example carry out ten
Senary conversion, wherein the longitude information more for decimal and latitude information, longitude and latitude compression unit 21 can also carry out small
Numerical digit number modification processing.For temporal information, since the information is not stringent numerical value, should not carry out decimal digits modification and into
System conversion, but time compression unit 23 can be handled by formatting and be compressed.
Module 30 is arranged, for arranging the position data after compression processing；
After carrying out compression processing, arrangement module 30 arranges position data.Multiple position datas after arrangement can
It is sent as a short message.One short message at most may include four position datas, in this way, in existing transmission frequency
Under rate and transmission length limitation, more information content are just sent.
Above-mentioned functional module is further qualified below.
Fig. 8 shows the structural schematic diagram of the position data compressibility second embodiment based on dipper system, with first
Embodiment has been done defined below compared to second embodiment:
Longitude and latitude compression unit 21 includes:
Longitude digit modifies subelement 211, for modifying longitude information, so that longitude information retains the small of presetting digit capacity
Number；
Latitude digit modifies subelement 212, for modifying latitude information, so that latitude information retains the small of presetting digit capacity
Number.
Longitude information and latitude information in dipper system have 15 decimals.It is small why so multidigit is set
Number is since on earth, once, span just has tens kilometers or even kilometer up to a hundred for longitude or the every variation of latitude.Therefore, must
It must be accurate to the decimal ability accurate description longitude and latitude of certain digit, to guarantee setting accuracy.But 15 small
Number undoubtedly makes longitude information and latitude information occupy excessive numerical digit space, practical in the case where having also not need 15
Decimal also can be positioned accurately, for example when positioning target is moved with fast speed, can suitably be reduced
Decimal.User can according to their needs preset the how many decimals of reservation, thus not influencing the same of setting accuracy
Shi Jingdu digit modifies subelement 211 and modifies longitude information, and latitude digit modifies subelement 212 and modifies latitude information.Such as it is right
Longitude information 113.219379271322323 and latitude information 32.219379271322323 carry out decimal digits modification processing,
Default to retain 7 decimals, then longitude information is 113.2193792 after longitude digit modification subelement 211 is modified, longitude and latitude position
Latitude information is 32.2193792 after number modification subelement 212 is modified.
Fig. 9 shows the structural schematic diagram of the position data compressibility 3rd embodiment based on dipper system, with second
Embodiment has been done defined below compared to 3rd embodiment:
Longitude and latitude compression unit 21 further include:
Longitude and latitude system conversion subunit 213, for carrying out hexadecimal conversion respectively to longitude information and latitude information.
Subelement 211 is modified in longitude digit and latitude digit modification subelement 212 respectively believes longitude information and latitude
After breath carries out decimal digits modification processing, longitude and latitude system conversion subunit 213 can carry out system conversion to two information.Through
Degree information and latitude information are all decimal values, and two information are carried out higher system by longitude and latitude system conversion subunit 213
Conversion, as the most commonly used is hexadecimals in computer science.When conversion, to be simplified, longitude and latitude system conversion subunit
213 first remove decimal point, carry out hexadecimal conversion using longitude information and latitude information as integer.Other terminals are receiving
After short message, inverse conversion is carried out that is, after decimal system conversion to longitude information and latitude information and is removed further according to by the information after reduction
With 10n, wherein n is the decimal digits that user retains longitude information and latitude information.
For example longitude and latitude system conversion subunit 213 is to longitude information 113.2193792 and latitude information 32.2193792
System conversion processing is carried out, longitude and latitude system conversion subunit 213 carries out hexadecimal conversion, longitude information after removing decimal point
It is converted into " 437BE800 " by " 1132193792 ", latitude information " 322193792 " is converted into " 13344980 ".Wherein terminal exists
Decimal system conversion is carried out after receiving above- mentioned information, longitude information is reduced to " 1132193792 ", latitude information is reduced to
"322193792".Retain 7 decimals since longitude information and latitude information are default, respectively by longitude information
" 1132193792 " and latitude information divided by 10000000, can restore the raw value of longitude information respectively
The raw value " 32.2193792 " of " 113.2193792 " and latitude information.
Figure 10 shows the structural schematic diagram of the position data compressibility fourth embodiment based on dipper system, with third
Embodiment has been done defined below compared to fourth embodiment:
Speed is high to include: to compression unit 22
Fast height is to system conversion subunit 221, for carrying out 16 respectively to velocity information, elevation information and directional information
System conversion.
The decimal of velocity information, elevation information and directional information is few, should not carry out decimal place to the fractional part of information
Number modification, but speed height can carry out system conversion to system conversion subunit 221 to these three information, for example three information are turned
Turn to hexadecimal.When conversion, to be simplified, speed height first removes decimal point to system conversion subunit 221, and speed is believed
Breath, elevation information and directional information carry out hexadecimal conversion as integer.Other terminals are after receiving short message, to speed
Information, elevation information and directional information carry out inverse conversion, i.e., after decimal system conversion, then by the information after reduction divided by 10n, wherein
N is user to the default decimal digits retained of velocity information, elevation information and directional information.
For example speed height is 23.42 (meter per seconds), elevation information 4221 to velocity information to system conversion subunit 221
(rice), directional information are that 132 (degree) carry out hexadecimal conversion.Fast height first removes decimal point to system conversion subunit 221, will
Three information carry out hexadecimal conversion as integer, i.e., convert " 0926 ", elevation information by " 2342 " for velocity information
" 4221 " are converted into " 107D ", and directional information is converted into " 0084 " by " 132 ".Other terminals are receiving velocity information, height
Decimal system conversion is carried out after information and directional information, and velocity information is reduced to " 2342 ", elevation information is reduced to " 4221 ",
Directional information is reduced to " 132 ".Since velocity information retains 2 decimals, other two information do not retain decimal, therefore will be fast
It spends information " 2342 " and obtains velocity information raw value " 23.42 " divided by " 100 ", will be obtained after elevation information " 4221 " divided by " 1 "
To elevation information raw value " 4221 ", directional information raw value " 132 " will be obtained divided by " 1 " after directional information " 132 ".
Figure 11 shows the structural schematic diagram of the 5th embodiment of position data compressibility based on dipper system, with the 4th
Embodiment has been done defined below compared to the 5th embodiment:
Temporal information includes date information and temporal information；
Time compression unit 23 includes:
The first time compresses subelement 231, for deleting the front two number of date information in the first position data；
Other times compress subelement 232, for deleting the date information in other positions data.
Above-mentioned functional module is according to reception at least two position data, and the very short feature of positioning intervals in practice
It is designed.Since the difference of the temporal information of different location data in a short message is generally exactly temporal information, date
Information does not have difference, and other times compress 232, the subelement date informations for retaining the first position data, leave out other positions number
According to date information.Other terminals can restore other according to the date information of the first position data after receiving short message
The date information of position data.In addition, the front two number " 20 " of the date information of the first position data, is fixed and invariable, therefore
The first time compression subelement 231 can delete the two digits.
For example 2 position datas are received, and it is first position data and second position data respectively, first position data,
The temporal information of i.e. the first position data is 20190101102123, and 21 divide 23 when the time of expression is 1 day 10 January in 2019
Second, the temporal information of second position data is 20190101102124, and 21 divide 24 when the time of expression is 1 day 10 January in 2019
Second.After being handled according to above-mentioned functional module, first position data time information is converted to 190101102123, second position data
Temporal information is converted to 102124.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of position data compression method based on dipper system characterized by comprising
S1 successively obtains at least two position datas, wherein the position data of first acquisition is the first position data, each
Position data includes longitude information, latitude information, velocity information, elevation information, directional information and temporal information；
S2 carries out compression processing to the position data respectively；
S3 arranges the position data after compression processing；
Wherein, the step S2 includes:
Digit modification and system conversion process are carried out to the longitude information and latitude information；
System conversion process is carried out to the velocity information, elevation information and directional information；
Processing is formatted to the temporal information.
2. the position data compression method of dipper system as described in claim 1, which is characterized in that described to longitude information and latitude
Degree information carries out the step of digit modifies processing
The longitude information is modified, so that longitude information retains the decimal of presetting digit capacity；
The latitude information is modified, so that latitude information retains the decimal of presetting digit capacity.
3. the position data compression method of dipper system as described in claim 1, which is characterized in that described to longitude information and latitude
Spending the step of information carries out system conversion process includes:
Hexadecimal conversion is carried out respectively to the longitude information and latitude information.
4. the position data compression method of dipper system as described in claim 1, which is characterized in that described to velocity information, height
Degree information and directional information carry out system conversion process the step of include:
Hexadecimal conversion is carried out respectively to the velocity information, elevation information and directional information.
5. the position data compression method of dipper system as described in claim 1, which is characterized in that the temporal information includes day
Phase information and temporal information；
Described the step of being formatted processing to temporal information includes:
Delete the front two number of date information in the first position data；
Delete the date information in other positions data.
6. a kind of position data compressibility based on dipper system characterized by comprising
Receiving module, for successively obtaining at least two position datas, wherein the position data of first acquisition is the first position
Data, each position data include longitude information, latitude information, velocity information, elevation information, directional information and time letter
Breath；
Compressing processing module, for carrying out compression processing to the position data respectively；
Module is arranged, for arranging the position data after compression processing；
Wherein, compressing processing module includes:
Longitude and latitude compression unit, for carrying out digit modification and system conversion process to the longitude information and latitude information；
It is fast high to compression unit, for carrying out system conversion process to the velocity information, elevation information and directional information；
Time compression unit, for being formatted processing to the temporal information.
7. the position data compressibility of dipper system as claimed in claim 6, which is characterized in that the longitude and latitude compression unit
Include:
Longitude digit modifies subelement, for modifying the longitude information, so that longitude information retains the decimal of presetting digit capacity；
Latitude digit modifies subelement, for modifying the latitude information, so that latitude information retains the decimal of presetting digit capacity.
8. the position data compressibility of dipper system as claimed in claim 6, which is characterized in that the longitude and latitude compression unit
Further include:
Longitude and latitude system conversion subunit, for carrying out hexadecimal conversion respectively to the longitude information and latitude information.
9. the position data compressibility of dipper system as claimed in claim 6, which is characterized in that the speed is high to compression unit
Include:
It is fast high to system conversion subunit, for the velocity information, elevation information and directional information are carried out respectively 16 into
System conversion.
10. the position data compressibility of dipper system as claimed in claim 6, which is characterized in that the temporal information includes
Date information and temporal information；
The time compression unit includes:
The first time compresses subelement, for deleting the front two number of date information in the first position data；
Other times compress subelement, for deleting the date information in other positions data.
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