CN107728174A - A kind of Big Dipper sub-meter grade location-based service comprehensive covering method of dynamic self-adapting - Google Patents
A kind of Big Dipper sub-meter grade location-based service comprehensive covering method of dynamic self-adapting Download PDFInfo
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- CN107728174A CN107728174A CN201710856080.4A CN201710856080A CN107728174A CN 107728174 A CN107728174 A CN 107728174A CN 201710856080 A CN201710856080 A CN 201710856080A CN 107728174 A CN107728174 A CN 107728174A
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- differential
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
Abstract
The invention discloses a kind of Big Dipper sub-meter grade location-based service all standing method of dynamic self-adapting, utilize the base station for being distributed in the region, calculate the differential correctional of single base station, by the region according to being divided into some sub-regions, calculate every sub-regions central point and the differential correctional on four summits, build the gradient face of the region differential correctional, analyze the differential correctional graded speed in the region, the differential correctional of base station uncovered area is calculated, counts and judges whether the differential correctional gradient change rate of two sub-regions is more thanUsing the sub-zone dividing size after adjust automatically, some zonules are reclassified as to the region, the differential correctional using the differential correctional Grad in the region as the subregion, are sent to user's positioning.The present invention prevents user from occurring the situation of positioning precision mutation in use, realizes all standing of sub-meter grade location-based service.
Description
Technical field
The present invention relates to a kind of comprehensive covering method of location-based service, the Big Dipper sub-meter grade position of particularly a kind of dynamic self-adapting
The comprehensive covering method of the service of putting.
Background technology
Current domestic Big Dipper pseudo-range differential position is based on single base station difference, grid difference, but the clothes of this kind of method
Scope of being engaged in is limited.For the region without base station or grid, above method can not be the region without differential correctional
User provides real-time pseudo range difference service, causes user to enter from the effective overlay area of base station without base station region (or lattice
Net) when, positioning precision is undergone mutation, and is unfavorable for Consumer's Experience.Therefore a kind of Big Dipper sub-meter grade position of dynamic self-adapting is needed
All standing method is serviced, to prevent user from occurring the situation of positioning precision mutation in use, realizes that sub-meter grade position takes
The all standing of business.
The content of the invention
The Big Dipper sub-meter grade location-based service that the technical problems to be solved by the invention are to provide a kind of dynamic self-adapting is comprehensive
Covering method, prevent user from occurring the situation of positioning precision mutation in use, realize that the complete of sub-meter grade location-based service covers
Lid.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of Big Dipper sub-meter grade location-based service all standing method of dynamic self-adapting, it is characterised in that comprise the steps of：
Step 1：Using the base station for being distributed in the region, the differential correctional of single base station is calculated；
Step 2：By the region according to some sub-regions are divided into, calculate per sub-regions central point and four summits
Differential correctional；
Step 3：Count differential correctional, the correction of all subregion central point pseudorange of synchronization region Nei Dan base stations
Number and the differential correctional on four summits of all subregion, build the gradient face of the region differential correctional；
Step 4：Analyze the differential correctional graded speed in the region；
In formula：τ represents differential correctional graded speed, Δ R1, Δ R2Represent two differential correctional Grad, L12
Represent the distance between two differential correctional gradient lines；
Step 5：According to differential correctional graded speed, the differential correctional of reckoning base station uncovered area；
Step 6：Count and judge the differential correctional gradient change rate of two sub-regions, if being more thanAutomatically will
The difference of longitude and difference of latitude for dividing subregion are turned down；If it is less thanAutomatically the difference of longitude and difference of latitude of subregion will be divided
Tune up；
Step 7：Using the sub-zone dividing size after adjust automatically, some zonules are reclassified as to the region, will
Differential correctional of the differential correctional Grad in the region as the subregion, it is sent to user's positioning.
Further, the step 1 specifically, in zoning all base stations differential correctional, pass through base station
Accurate coordinate and the satellite position that calculates in real time, calculate the differential correctional of BDS B1 frequency ranges and the pseudorange of GPS L1 frequency ranges change
Positive number.
Further, if the step 2 is specifically, the region is divided into according to fixed difference of longitude and difference of latitude
Dry sub-regions, using the base station differential correctional in the range of subregion, subregion central point and subregion model are calculated respectively
The distance of interior base station is enclosed, according to apart from interpolation method, the differential correctional of calculating subregion central point.
It is further, described to be apart from interpolation calculation formula,
Wherein, Δ RcenterRepresent the differential correctional of central point, Δ Ri, liRepresent that the pseudorange of i-th of base station changes respectively
Positive number and the distance of i-th of base station and central point.
Further, gradient face construction method is in the step 3, will be pseudo- with default gradient difference division gradient face
Face is connected into away from correction identical point.
Further, region division is by the step 7 again specifically, according to the subregion size after adjust automatically
Some subregions, using differential correctional Grad, using interpolation method, the differential correctional of subregion central point is calculated, is sent
To user, realize that differential correctional covering is region-wide.
The present invention compared with prior art, has advantages below and effect：The present invention realizes Big Dipper sub_meter position clothes
Effective all standing of business, when user enters uncovered area from the effective overlay area of base station, the positioning precision of user will not be sent out
Raw saltus step, Consumer's Experience do not produce difference.This method can be applied to national areas, can also be applied to provincial region.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the Big Dipper sub-meter grade location-based service all standing method of dynamic self-adapting of the present invention.
Fig. 2 is the differential correctional Grad and gradient change rate schematic diagram of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described in further detail by embodiment, and following examples are to this hair
Bright explanation and the invention is not limited in following examples.
As shown in figure 1, the present invention a kind of dynamic self-adapting Big Dipper sub-meter grade location-based service all standing method, comprising with
Lower step：
Step 1：Using the base station for being distributed in the region, the differential correctional of single base station is calculated；
The differential correctional of all base stations in zoning, by using base station accurate coordinate and calculate in real time
Satellite position, calculate the differential correctional of BDS (Beidou satellite navigation system) B1 frequency ranges and the differential correctional of GPS L1 frequency ranges；
As needed, also BDS double frequencies differential correctional and GPS double frequency differential correctionals can be calculated according to same method.
Step 2：By the region according to some sub-regions are divided into, calculate per sub-regions central point and four summits
Differential correctional；
By the region according to fixed difference of longitude and difference of latitude (quadrangle of 1 degree of 1 degree of latitude step-length and longitude step-length)
Some sub-regions are divided into, as shown in Fig. 2 the region division is 4 sub-regions.Calculate subregion central point and 4 summits
Differential correctional, using the base station differential correctional in the range of subregion, calculate subregion central point and subregion respectively
In the range of base station distance, according to apart from interpolation method, calculate the differential correctional of subregion central point.
It is apart from interpolation calculation formula, exemplified by having 3 base stations in subregion,
Wherein, Δ RcenterRepresent the differential correctional of central point, Δ Ri, liRepresent that the pseudorange of i-th of base station changes respectively
Positive number and the distance of i-th of base station and central point.
In the same way, the differential correctional on 4 summits of grid is calculated.
Step 3：Count differential correctional, the correction of all subregion central point pseudorange of synchronization region Nei Dan base stations
Number and the differential correctional on four summits of all subregion, build the gradient face of the region differential correctional；Gradient face construction method
To divide gradient face with 1 meter of gradient difference, gradient face is similar with contour to connect into face by differential correctional identical point.
Step 4：Analyze the differential correctional graded speed in the region；
In formula：τ represents differential correctional graded speed, Δ R1, Δ R2Represent two differential correctional Grad, L12
Represent the distance between two differential correctional gradient lines；
Step 5：According to differential correctional graded speed, the average value for choosing differential correctional gradient change rate is made
For foundation, the differential correctional of reckoning base station uncovered area；
Step 6：Count and judge whether the differential correctional gradient change rate of two sub-regions is more thanIf it is more thanAutomatically the difference of longitude for dividing subregion and difference of latitude are turned down, ensures whole sub-districts
The differential correctional gradient change rate in domain is less thanIf it is less thanAutomatically the difference of longitude and latitude of subregion will be divided
Degree difference tunes up, and ensures that the differential correctional gradient change rate of whole subregions is less than
Step 7：Using the sub-zone dividing size after adjust automatically, some zonules are reclassified as to the region, will
Differential correctional of the differential correctional Grad in the region as the subregion, it is sent to user's positioning.
According to the subregion size after adjust automatically, it is again some subregions by region division, utilizes differential correctional
Grad, using interpolation method, the differential correctional of subregion central point is calculated, is sent to user, realize that differential correctional covers
Region-wide, no matter user can enjoy the location-based service of no precision mutation to any one place in region.
Above content described in this specification is only illustration made for the present invention.Technology belonging to the present invention
The technical staff in field can make various modifications or supplement to described specific embodiment or using similar mode
Substitute, content without departing from description of the invention or surmount scope defined in the claims, this all should be belonged to
The protection domain of invention.
Claims (6)
1. a kind of Big Dipper sub-meter grade location-based service all standing method of dynamic self-adapting, it is characterised in that comprise the steps of：
Step 1：Using the base station for being distributed in the region, the differential correctional of single base station is calculated；
Step 2：By the region according to some sub-regions are divided into, the puppet on every sub-regions central point and four summits is calculated
Away from correction；
Step 3：Count the differential correctionals of synchronization region Nei Dan base stations, all subregion central point differential correctional and
The differential correctional on four summits of all subregion, build the gradient face of the region differential correctional；
Step 4：Analyze the differential correctional graded speed in the region；
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<mn>2</mn>
</msub>
</mrow>
<msub>
<mi>L</mi>
<mn>12</mn>
</msub>
</mfrac>
</mrow>
In formula：τ represents differential correctional graded speed, Δ R1, Δ R2Represent two differential correctional Grad, L12Represent
The distance between two differential correctional gradient lines；
Step 5：According to differential correctional graded speed, the differential correctional of reckoning base station uncovered area；
Step 6：Count and judge the differential correctional gradient change rate of two sub-regions, if being more thanAutomatically will division
The difference of longitude and difference of latitude of subregion are turned down；If it is less thanAutomatically the difference of longitude for dividing subregion and difference of latitude are tuned up；
Step 7：Using the sub-zone dividing size after adjust automatically, some zonules are reclassified as to the region, by the area
Differential correctional of the differential correctional Grad in domain as the subregion, it is sent to user's positioning.
2. according to a kind of Big Dipper sub-meter grade location-based service all standing method of dynamic self-adapting described in claim 1, its feature
It is：The step 1 specifically, in zoning all base stations differential correctional, by the accurate coordinate of base station and
The satellite position calculated in real time, calculate the differential correctional of BDS B1 frequency ranges and the differential correctional of GPS L1 frequency ranges.
3. according to a kind of Big Dipper sub-meter grade location-based service all standing method of dynamic self-adapting described in claim 1, its feature
It is：The step 2 according to fixed difference of longitude and difference of latitude by the region specifically, be divided into some sub-regions, profit
With the base station differential correctional in the range of subregion, calculate respectively subregion central point with the range of subregion base station away from
From according to apart from interpolation method, the differential correctional of calculating subregion central point.
4. according to a kind of Big Dipper sub-meter grade location-based service all standing method of dynamic self-adapting described in claim 3, its feature
It is：It is described to be apart from interpolation calculation formula,
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</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>l</mi>
<mn>1</mn>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>&Delta;R</mi>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mi>l</mi>
<mn>2</mn>
</msub>
<mo>&CenterDot;</mo>
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<msub>
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<mn>3</mn>
</msub>
</mrow>
</mfrac>
</mrow>
Wherein, Δ RcenterRepresent the differential correctional of central point, Δ Ri, liThe differential correctional of i-th of base station is represented respectively
With the distance of i-th of base station and central point.
5. according to a kind of Big Dipper sub-meter grade location-based service all standing method of dynamic self-adapting described in claim 1, its feature
It is：Gradient face construction method is in the step 3, with default gradient difference division gradient face, i.e., differential correctional is identical
Point connect into face.
6. according to a kind of Big Dipper sub-meter grade location-based service all standing method of dynamic self-adapting described in claim 1, its feature
It is：Region division is again some subregions specifically, according to the subregion size after adjust automatically by the step 7,
Using differential correctional Grad, using interpolation method, the differential correctional of subregion central point is calculated, is sent to user, realized
Differential correctional covering is region-wide.
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Address after: No. 62, Longquan Town Park Road, Longquanyi District, Chengdu, Sichuan Patentee after: The third geodetic survey team of the Ministry of natural resources Address before: No. 62, Longquan Town Park Road, Longquanyi District, Chengdu, Sichuan Patentee before: NATIONAL SURVEYING AND MAPPING BUREAU OF GEOGRAPHICAL INFORMATION OF THE THIRD LARGEST SURVEY TEAM (SICHUAN PROVINCE SURVEYING AND MAPPING ENGINEERING INSTITUTE) |