CN113311454A - Method, device and equipment for evaluating discrete degree of GPS positioning point - Google Patents

Method, device and equipment for evaluating discrete degree of GPS positioning point Download PDF

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CN113311454A
CN113311454A CN202010119126.6A CN202010119126A CN113311454A CN 113311454 A CN113311454 A CN 113311454A CN 202010119126 A CN202010119126 A CN 202010119126A CN 113311454 A CN113311454 A CN 113311454A
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positioning
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李跤
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China Mobile Communications Group Co Ltd
China Mobile IoT Co Ltd
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Abstract

The invention provides a method, a device and equipment for evaluating the dispersion degree of a GPS positioning point, which relate to the technical field of GPS positioning test, and the method comprises the following steps: receiving positioning point coordinates sent by a GPS module at intervals of preset time; determining the coordinates of the central point of a plurality of positioning points and the deviation of the currently acquired positioning point relative to the coordinates of the central point according to the received coordinates of the positioning points; and determining the discrete degree of the GPS positioning point according to the central point coordinate and the deviation. The scheme of the invention realizes the real-time calculation of the central position and the deviation range of the GPS positioning point and reduces the calculation amount.

Description

Method, device and equipment for evaluating discrete degree of GPS positioning point
Technical Field
The invention relates to the technical field of GPS positioning test, in particular to a method, a device and equipment for evaluating the dispersion degree of GPS positioning points.
Background
In the prior art, a Circle Error Probability (CEP) with statistical significance is generally used to evaluate the dispersion degree of a Global Positioning System (GPS) Positioning point, and the calculation method is to count a certain sampleThis point, for example: coordinates of 100 GPS positioning points, and then calculating standard deviation sigma of x and y axes (corresponding to longitude and latitude (longitude)) respectivelyx，σyThen according to the formula CEP (50) ═ 0.589(σ)x+σy) And performing calculation, wherein the calculated value is used for evaluating the dispersion degree of the coordinates of the GPS positioning points, and the lower the dispersion degree is, the denser the GPS positioning points are, and the smaller the positioning drift is. However, this calculation method needs to complete the acquisition of all the sample points before the calculation can be performed by using the statistical method, which results in large calculation amount and poor real-time dynamics.
Disclosure of Invention
The invention aims to provide a method, a device and equipment for evaluating the dispersion degree of a GPS positioning point, so that the problems of large calculation amount and poor real-time dynamic property caused by the fact that a calculation method in the prior art can use a statistical method for calculation only after the acquisition of all sample points is completed are solved.
In order to achieve the above object, the present invention provides a method for evaluating a degree of dispersion of GPS fix points, comprising:
receiving positioning point coordinates sent by a GPS module at intervals of preset time;
determining the coordinates of the central point of a plurality of positioning points and the deviation of the currently acquired positioning point relative to the coordinates of the central point according to the received coordinates of the positioning points;
and determining the discrete degree of the GPS positioning point according to the central point coordinate and the deviation.
Optionally, the step of determining, according to the received coordinates of the positioning points, the coordinates of the central point of the positioning points and the currently obtained deviation of the positioning point relative to the coordinates of the central point includes:
and when the first locating point coordinate is received, determining the coordinate of the central point of the locating point as the locating point coordinate, wherein the deviation is zero.
Optionally, the step of determining, according to the received coordinates of the positioning points, the coordinates of the central point of the positioning points and the currently obtained deviation of the positioning point relative to the coordinates of the central point includes:
when two or more positioning point coordinates are received, updating the center point coordinates according to the currently determined center point coordinates and the currently received positioning point coordinates;
and determining the deviation of the positioning point corresponding to the currently received positioning point coordinate relative to the updated central point.
Optionally, when two or more positioning point coordinates are received, the step of updating the center point coordinate according to the currently determined center point coordinate and the currently received positioning point coordinate includes:
according to the formula
Figure BDA0002392410940000021
Updating the longitude in the center point coordinates; wherein, longi (n) is the longitude of the updated central point coordinate, longi (n-1) is the longitude of the central point coordinate before updating, longi _ n is the longitude of the currently received positioning point coordinate, and n is the number of the currently received positioning point coordinates;
according to the formula
Figure BDA0002392410940000022
Updating the latitude in the center point coordinate; wherein, lati (n) is the latitude of the updated center point coordinate, lati (n-1) is the latitude of the center point coordinate before updating, lati _ n is the latitude of the currently received positioning point coordinate, and n is the number of the currently received positioning point coordinates.
Optionally, after the step of determining a deviation of the positioning point corresponding to the currently received positioning point coordinate with respect to the updated central point, the method further includes:
according to the formula:
Figure BDA0002392410940000023
determining a current maximum deviation; where dis _ dev1 is the maximum deviation, dis, of the current storagenFor the currently calculated deviation valueDis _ dev2 is the current maximum deviation.
Optionally, the step of determining the degree of dispersion of the GPS positioning point according to the center point coordinate and the deviation includes:
and after receiving the coordinates of the positioning points with the preset number, determining the discrete degree of the GPS positioning point according to the currently updated center point coordinates and the currently determined maximum deviation.
Optionally, the step of determining a deviation of the positioning point corresponding to the currently received positioning point coordinate with respect to the updated central point includes:
according to the formula:
Figure BDA0002392410940000031
determining the deviation; wherein disnFor the deviation, lati _ n is the latitude of the currently received positioning point coordinate, lati (n) is the latitude of the updated central point coordinate, longi _ n is the longitude of the currently received positioning point coordinate, longi (n) is the longitude of the updated central point coordinate, and R is the earth radius.
Optionally, the step of determining the degree of dispersion of the GPS positioning point according to the center point coordinate and the deviation includes:
after receiving a preset number of positioning point coordinates, acquiring the updated central point coordinates and the maximum deviation in the plurality of deviations; and the updated central point coordinate and the maximum deviation are used for representing the dispersion degree of the GPS positioning point.
The embodiment of the invention also provides an evaluation device for the dispersion degree of the GPS positioning point, which comprises the following steps:
the receiving module is used for receiving the positioning point coordinates sent by the GPS module at intervals of preset duration;
the first determining module is used for determining the center point coordinates of a plurality of positioning points and the deviation of the currently acquired positioning point relative to the center point coordinates according to the received coordinates of the positioning points;
and the second determination module is used for determining the discrete degree of the GPS positioning point according to the central point coordinate and the deviation.
Optionally, the first determining module includes:
and the first determining submodule is used for determining the coordinates of the center point of the positioning point as the coordinates of the positioning point when the first coordinates of the positioning point are received, and the deviation is zero.
Optionally, the first determining module includes:
the updating submodule is used for updating the center point coordinate according to the currently determined center point coordinate and the currently received locating point coordinate when two or more locating point coordinates are received;
and the second determining submodule is used for determining the deviation of the positioning point corresponding to the currently received positioning point coordinate relative to the updated central point.
Optionally, the update sub-module includes:
a first updating unit for updating the data according to a formula
Figure BDA0002392410940000041
Updating the longitude in the center point coordinates; wherein, longi (n) is the longitude of the updated central point coordinate, longi (n-1) is the longitude of the central point coordinate before updating, longi _ n is the longitude of the currently received positioning point coordinate, and n is the number of the currently received positioning point coordinates;
a second updating unit for updating the data according to the formula
Figure BDA0002392410940000042
Updating the latitude in the center point coordinate; wherein, lati (n) is the latitude of the updated center point coordinate, lati (n-1) is the latitude of the center point coordinate before updating, lati _ n is the latitude of the currently received positioning point coordinate, and n is the number of the currently received positioning point coordinates.
Optionally, the second determining submodule is configured to, according to a formula:
Figure BDA0002392410940000043
determining the deviation; wherein disnFor the deviation, lati _ n is the latitude of the currently received positioning point coordinate, lati (n) is the latitude of the updated central point coordinate, longi _ n is the longitude of the currently received positioning point coordinate, longi (n) is the longitude of the updated central point coordinate, and R is the earth radius.
Optionally, the first determining module further includes:
a third determining submodule for determining a current maximum deviation. According to the formula:
Figure BDA0002392410940000044
determining a current maximum deviation; where dis _ dev1 is the maximum deviation, dis, of the current storagenFor the current calculated bias value, dis _ dev2 is the current maximum bias.
Optionally, the second determining module is configured to, after receiving a preset number of positioning point coordinates, determine a discrete degree of the GPS positioning point according to the currently updated center point coordinate and the currently determined maximum deviation.
Optionally, the second determining module is configured to, after receiving a preset number of positioning point coordinates, obtain the updated center point coordinate and a maximum deviation of the plurality of deviations; and the updated central point coordinate and the maximum deviation are used for representing the dispersion degree of the GPS positioning point.
The embodiment of the invention also provides an evaluation device, which comprises a transceiver, a memory, a processor and a computer program which is stored on the memory and can run on the processor; the processor, when executing the computer program, implements the method for assessing the degree of dispersion of GPS fix points as described above.
The embodiment of the invention also provides an evaluation device, which comprises the evaluation device for the dispersion degree of the GPS positioning points.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for evaluating the degree of dispersion of a GPS positioning point as described above.
The technical scheme of the invention at least has the following beneficial effects:
the method for evaluating the dispersion degree of the GPS positioning point comprises the steps of receiving positioning point coordinates sent by a GPS module at intervals of preset duration, determining central point coordinates of a plurality of positioning points and the deviation of the currently acquired positioning point relative to the central point coordinates according to the received positioning point coordinates, dynamically updating the central position of a historical positioning point after the GPS positioning point is acquired each time, and calculating the deviation range, so that each positioning point can be directly used for calculating and updating the central coordinates and the deviation range, and the calculated amount is reduced; and finally, determining the dispersion degree of the GPS positioning point according to the central point coordinate and the deviation, realizing the quantification of the dispersion degree of the GPS positioning point and facilitating the determination of the positioning precision of the GPS.
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FIG. 1 is a schematic diagram illustrating the basic steps of a method for evaluating the dispersion degree of GPS positioning points according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the basic components of the apparatus for evaluating the degree of dispersion of GPS positioning points according to the embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a method, a device and equipment for evaluating the dispersion degree of a GPS positioning point, aiming at the problems of large calculation amount and poor real-time dynamic property of the dispersion degree evaluation method of the GPS positioning point in the prior art, so that each positioning point can be directly used for calculating and updating a central coordinate, the calculation amount is reduced, and the central coordinate can be updated in real time.
As shown in fig. 1, which is a schematic diagram illustrating the basic steps of a method for evaluating the degree of dispersion of a GPS positioning point according to an embodiment of the present invention, the method includes:
step S101, receiving positioning point coordinates sent by a GPS module at intervals of preset duration;
in this step, the GPS module periodically transmits data (positioning point coordinates), preferably, at a transmission frequency of 1Hz, that is, 1s updates the position data once; the coordinates of the positioning point comprise the longitude of the positioning point and the latitude of the positioning point, and the unit is degree.
Step S102, determining central point coordinates of a plurality of positioning points and the deviation of the currently acquired positioning points relative to the central point coordinates according to the received coordinates of the positioning points;
it should be noted that the center point coordinate is a coordinate of a point at the center position between two points; therefore, in this step, the center point coordinates are coordinates of the center position between the two positioning points.
In the step, the coordinates of the central point are updated according to the coordinates of the positioning point and the currently determined coordinates of the central point every time one positioning point coordinate is received, so that the coordinates of the central point are updated in real time in a recursive mode, each positioning point coordinate participates in calculation, the calculation amount is reduced, and the real-time dynamic property of a calculation result is improved.
And S103, determining the discrete degree of the GPS positioning point according to the central point coordinate and the deviation.
In this step, the dispersion degree of the GPS positioning points can be represented by the deviation of each positioning point from the central point determined by the positioning point, and when the dispersion degree is lower, the GPS positioning points are more dense, the positioning drift is smaller, and the positioning accuracy of the GPS is higher.
The method for evaluating the dispersion degree of the GPS positioning point comprises the steps of receiving the coordinates of the positioning point through interval preset time length; after receiving a positioning point coordinate, updating the central point coordinate once, and calculating the deviation of the positioning point coordinate relative to the updated central point coordinate; finally, the discrete degree of the GPS positioning point is determined according to the central point coordinate and the plurality of deviations, and the real-time dynamic update of the central point coordinate is realized by each positioning point coordinate, so that the calculated amount is reduced, the discrete degree of the GPS positioning point is quantized, and the positioning precision of the GPS is convenient to determine.
In some embodiments, step S102, determining, according to the received coordinates of the positioning points, center point coordinates of the positioning points and a deviation of the currently acquired positioning point with respect to the center point coordinates, includes:
and when the first locating point coordinate is received, determining the coordinate of the central point of the locating point as the locating point coordinate, wherein the deviation is zero.
Since the center point is the center position between the two points, when the coordinate of the first positioning point is received, the coordinate of the positioning point is defined as the current center point coordinate, and therefore, the deviation of the positioning point relative to the current center point is zero.
In some embodiments, step S102, determining, according to the received coordinates of the positioning points, center point coordinates of the positioning points and a deviation of the currently acquired positioning point with respect to the center point coordinates, includes:
firstly, when two or more positioning point coordinates are received, the center point coordinates are updated according to the currently determined center point coordinates and the currently received positioning point coordinates.
When two positioning points are received, the current central point is determined to be the central positions of the two positioning points, and when three or more positioning points are received, the coordinates of the central point can be updated through the currently determined central point and the currently received central positions of the positioning points, so that the updating of the coordinates of the central point with each positioning point participating in the coordinate by adopting a recursion mode is realized, the calculation amount is reduced, and the real-time performance of the calculation result is improved.
Secondly, determining the deviation of the positioning point corresponding to the currently received positioning point coordinate relative to the updated central point.
Optionally, in some embodiments, after the step of determining a deviation of the positioning point corresponding to the currently received positioning point coordinate with respect to the updated central point, the method further includes:
according to the formula:
Figure BDA0002392410940000071
determining a current maximum deviation; where dis _ dev1 is the current stored maximum deviation, disn is the current calculated deviation value, and dis _ dev2 is the current maximum deviation. That is, after each calculation of the offset value, the currently calculated offset value is compared with the current maximum offset, and if the currently calculated offset value is greater than the current maximum offset, the current maximum offset is updated to the currently calculated offset value, and if the currently calculated offset value is less than or equal to the current maximum offset, the current maximum offset is not updated.
Because the deviation is a parameter representing the degree of dispersion, in order to evaluate the degree of dispersion of the GPS positioning point, the embodiment of the present invention calculates the deviation of the positioning point relative to the current central point after receiving the coordinates of each positioning point, thereby ensuring that the range of the degree of dispersion of the GPS positioning point is finally determined according to the deviation of each positioning point.
Optionally, in step S103, the step of determining the discrete degree of the GPS positioning point according to the center point coordinate and the deviation includes:
and after receiving the coordinates of the positioning points with the preset number, determining the discrete degree of the GPS positioning point according to the currently updated center point coordinates and the currently determined maximum deviation.
Specifically, when two or more positioning point coordinates are received, the step of updating the center point coordinate according to the currently determined center point coordinate and the currently received positioning point coordinate includes:
according to the formula
Figure BDA0002392410940000081
Updating the longitude in the center point coordinates; where longi (n) is the longitude of the updated center point coordinate, longi (n-1) is the longitude of the center point coordinate before updating, and lRegion _ n is the longitude of the currently received positioning point coordinates, and n is the number of the currently received positioning point coordinates;
according to the formula
Figure BDA0002392410940000082
Updating the latitude in the center point coordinate; wherein, lati (n) is the latitude of the updated center point coordinate, lati (n-1) is the latitude of the center point coordinate before updating, lati _ n is the latitude of the currently received positioning point coordinate, and n is the number of the currently received positioning point coordinates.
The formulas in the two steps are obtained by a recursive algorithm, and the specific derivation process is as follows:
because:
Figure BDA0002392410940000083
and is
Figure BDA0002392410940000084
Therefore:
Figure BDA0002392410940000085
thus:
Figure BDA0002392410940000086
specifically, the step of determining the deviation of the positioning point corresponding to the currently received positioning point coordinate with respect to the updated central point includes:
according to the formula:
Figure BDA0002392410940000091
determining the deviation; wherein disnFor the deviation, lati _ n is the latitude of the currently received positioning point coordinate, lati (n) is the latitude of the updated center point coordinate, longi _ n is the longitude of the currently received positioning point coordinate, and longi (n) is the updated longitudeLongitude of the center point coordinate, R is the radius of the earth.
In some embodiments, step S103, determining a degree of dispersion of the GPS positioning point according to the center point coordinates and the deviation includes:
after receiving a preset number of positioning point coordinates, acquiring the updated central point coordinates and the maximum deviation in the plurality of deviations; and the updated central point coordinate and the maximum deviation are used for representing the dispersion degree of the GPS positioning point.
In this step, after receiving the coordinates of the positioning points in the preset number, the maximum deviation of the plurality of deviations may be determined in a comparison manner.
In addition, in the embodiment of the present invention, if necessary, the coordinates of the historical center point and all the deviation values may also be provided to the user, so that the user may analyze and determine the degree of dispersion of the GPS positioning point.
According to the method for determining the dispersion degree of the GPS positioning point, disclosed by the embodiment of the invention, after the coordinates of a positioning point are received, the coordinates of the central point and the maximum deviation are updated in real time by adopting a recursive calculation method, so that each positioning point can be directly used for calculating and updating the central coordinates and the deviation range, and compared with the method for calculating the central position and the deviation after receiving the coordinates of all the positioning points in the prior art, the quantitative calculation amount of the dispersion degree of the GPS positioning point is reduced.
As shown in fig. 2, an embodiment of the present invention provides an apparatus for determining a degree of dispersion of GPS positioning points, including:
the receiving module 201 receives the positioning point coordinates sent by the GPS module at intervals of preset duration;
a first determining module 202, configured to determine, according to the received coordinates of the positioning points, a center point coordinate of the positioning points and a deviation of the currently obtained positioning point with respect to the center point coordinate;
and the second determining module 203 is configured to determine a discrete degree of the GPS positioning point according to the center point coordinate and the deviation.
In the apparatus for determining a degree of dispersion of a GPS positioning point according to an embodiment of the present invention, the first determining module 202 includes:
and the first determining submodule is used for determining the coordinates of the center point of the positioning point as the coordinates of the positioning point when the first coordinates of the positioning point are received, and the deviation is zero.
In the apparatus for determining a degree of dispersion of a GPS positioning point according to an embodiment of the present invention, the first determining module 202 includes:
the updating submodule is used for updating the center point coordinate according to the currently determined center point coordinate and the currently received locating point coordinate when two or more locating point coordinates are received;
and the second determining submodule is used for determining the deviation of the positioning point corresponding to the currently received positioning point coordinate relative to the updated central point.
In the apparatus for determining a degree of dispersion of a GPS positioning point according to an embodiment of the present invention, the update submodule includes:
a first updating unit for updating the data according to a formula
Figure BDA0002392410940000101
Updating the longitude in the center point coordinates; wherein, longi (n) is the longitude of the updated central point coordinate, longi (n-1) is the longitude of the central point coordinate before updating, longi _ n is the longitude of the currently received positioning point coordinate, and n is the number of the currently received positioning point coordinates;
a second updating unit for updating the data according to the formula
Figure BDA0002392410940000102
Updating the latitude in the center point coordinate; wherein, lati (n) is the latitude of the updated center point coordinate, lati (n-1) is the latitude of the center point coordinate before updating, lati _ n is the latitude of the currently received positioning point coordinate, and n is the number of the currently received positioning point coordinates.
In the apparatus for determining a degree of dispersion of a GPS positioning point according to an embodiment of the present invention, the second determining submodule is configured to, according to a formula:
Figure BDA0002392410940000103
determining the deviation; wherein disnFor the deviation, lati _ n is the latitude of the currently received positioning point coordinate, lati (n) is the latitude of the updated central point coordinate, longi _ n is the longitude of the currently received positioning point coordinate, longi (n) is the longitude of the updated central point coordinate, and R is the earth radius.
In the apparatus for determining a degree of dispersion of a GPS positioning point according to an embodiment of the present invention, the first determining module 202 further includes:
a third determining submodule for determining a current maximum deviation. According to the formula:
Figure BDA0002392410940000111
determining a current maximum deviation; where dis _ dev1 is the maximum deviation, dis, of the current storagenFor the current calculated bias value, dis _ dev2 is the current maximum bias.
In the apparatus for determining a discrete degree of a GPS positioning point according to the embodiment of the present invention, the second determining module 203 is configured to determine the discrete degree of the GPS positioning point according to the currently updated center point coordinate and the currently determined maximum deviation after receiving a preset number of positioning point coordinates.
In the apparatus for determining a degree of dispersion of a GPS positioning point according to the embodiment of the present invention, the second determining module 203 is configured to, after receiving a preset number of positioning point coordinates, obtain an updated center point coordinate and a maximum deviation of the plurality of deviations; and the updated central point coordinate and the maximum deviation are used for representing the dispersion degree of the GPS positioning point.
Since the device for evaluating the degree of dispersion of the GPS positioning point in this embodiment is a device embodiment corresponding to the method for evaluating the degree of dispersion of the GPS positioning point, each step in the embodiment of the degree of dispersion of the GPS positioning point can be implemented, and is not described herein again to avoid repetition.
The embodiment of the invention also provides an evaluation device, which comprises a transceiver, a memory, a processor and a computer program which is stored on the memory and can run on the processor; the processor, when executing the computer program, implements the method for assessing the degree of dispersion of GPS fix points as described above.
The embodiment of the invention also provides an evaluation device, which comprises the evaluation device for the dispersion degree of the GPS positioning points.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the brother process of the above-mentioned method for evaluating a degree of dispersion of GPS positioning points, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (12)

1. A method for evaluating the dispersion degree of GPS positioning points is characterized by comprising the following steps:
receiving positioning point coordinates sent by a GPS module at intervals of preset time;
determining the coordinates of the central point of a plurality of positioning points and the deviation of the currently acquired positioning point relative to the coordinates of the central point according to the received coordinates of the positioning points;
and determining the discrete degree of the GPS positioning point according to the central point coordinate and the deviation.
2. The method for assessing the degree of dispersion of GPS positioning points according to claim 1, wherein the step of determining, from the received coordinates of a plurality of positioning points, the coordinates of the center point of the plurality of positioning points and the deviation of the currently acquired positioning point with respect to the coordinates of the center point comprises:
and when the first locating point coordinate is received, determining the coordinate of the central point of the locating point as the locating point coordinate, wherein the deviation is zero.
3. The method for assessing the degree of dispersion of GPS positioning points according to claim 1, wherein the step of determining, from the received coordinates of a plurality of positioning points, the coordinates of the center point of the plurality of positioning points and the deviation of the currently acquired positioning point with respect to the coordinates of the center point comprises:
when two or more positioning point coordinates are received, updating the center point coordinates according to the currently determined center point coordinates and the currently received positioning point coordinates;
and determining the deviation of the positioning point corresponding to the currently received positioning point coordinate relative to the updated central point.
4. The method for assessing the degree of dispersion of a GPS positioning point according to claim 3, wherein the step of updating the coordinates of the center point according to the currently determined coordinates of the center point and the currently received coordinates of the positioning point when two or more coordinates of the positioning point are received comprises:
according to the formula
Figure FDA0002392410930000011
Updating the longitude in the center point coordinates; wherein, longi (n) is the longitude of the updated central point coordinate, longi (n-1) is the longitude of the central point coordinate before updating, longi _ n is the longitude of the currently received positioning point coordinate, and n is the number of the currently received positioning point coordinates;
according to the formula
Figure FDA0002392410930000012
Updating the latitude in the center point coordinate; wherein, lati (n) is the latitude of the updated center point coordinate, lati (n-1) is the latitude of the center point coordinate before updating, lati _ n is the latitude of the currently received positioning point coordinate, and n is the number of the currently received positioning point coordinates.
5. The method for assessing the degree of dispersion of GPS positioning points according to claim 3, wherein the step of determining the deviation of the positioning point corresponding to the currently received positioning point coordinates with respect to the updated center point comprises:
according to the formula:
Figure FDA0002392410930000021
determining the deviation; wherein disnFor the deviation, lati _ n is the latitude of the currently received positioning point coordinate, lati (n) is the latitude of the updated central point coordinate, longi _ n is the longitude of the currently received positioning point coordinate, longi (n) is the longitude of the updated central point coordinate, and R is the earth radius.
6. The method for assessing the degree of dispersion of GPS positioning points according to claim 3, wherein after the step of determining the deviation of the positioning point corresponding to the currently received positioning point coordinates with respect to the updated center point, the method further comprises:
according to the formula:
Figure FDA0002392410930000022
determining a current maximum deviation; where dis _ dev1 is the maximum deviation, dis, of the current storagenFor the current calculated bias value, dis _ dev2 is the current maximum bias.
7. The method for assessing the degree of dispersion of a GPS fix according to claim 6, wherein the step of determining the degree of dispersion of the GPS fix based on the center point coordinates and the deviation comprises:
and after receiving the coordinates of the positioning points with the preset number, determining the discrete degree of the GPS positioning point according to the currently updated center point coordinates and the currently determined maximum deviation.
8. The method for assessing the degree of dispersion of a GPS fix according to claim 1, wherein the step of determining the degree of dispersion of the GPS fix based on the center point coordinates and the deviation comprises:
after receiving a preset number of positioning point coordinates, acquiring the updated central point coordinates and the maximum deviation in the plurality of deviations; and the updated central point coordinate and the maximum deviation are used for representing the dispersion degree of the GPS positioning point.
9. An apparatus for evaluating a degree of dispersion of GPS positioning points, comprising:
the receiving module is used for receiving the positioning point coordinates sent by the GPS module at intervals of preset duration;
the first determining module is used for determining the center point coordinates of a plurality of positioning points and the deviation of the currently acquired positioning point relative to the center point coordinates according to the received coordinates of the positioning points;
and the second determination module is used for determining the discrete degree of the GPS positioning point according to the central point coordinate and the deviation.
10. An assessment device comprising a transceiver, a memory, a processor and a computer program stored on said memory and executable on said processor; characterized in that said processor, when executing said computer program, implements a method for assessing the degree of dispersion of a GPS fix according to any one of claims 1 to 8.
11. An assessment device, characterized by comprising an assessment means of the degree of dispersion of GPS fix points according to claim 9.
12. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the method for assessing the degree of dispersion of GPS fix points according to any one of claims 1 to 8.
CN202010119126.6A 2020-02-26 2020-02-26 Method, device and equipment for evaluating discrete degree of GPS positioning point Pending CN113311454A (en)

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