CN112857396B - Method and system for calculating dynamic positioning accuracy of terminal - Google Patents
Method and system for calculating dynamic positioning accuracy of terminal Download PDFInfo
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- CN112857396B CN112857396B CN202011637150.5A CN202011637150A CN112857396B CN 112857396 B CN112857396 B CN 112857396B CN 202011637150 A CN202011637150 A CN 202011637150A CN 112857396 B CN112857396 B CN 112857396B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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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
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
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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
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/40—Correcting position, velocity or attitude
Abstract
A method and a system for calculating the dynamic positioning precision of a terminal are provided, wherein the method comprises the following steps: step 1, fixing a terminal positioning antenna on the top of a vehicle; step 2, enabling the vehicle to repeatedly run along the planned route for multiple times, and obtaining a running track line of the vehicle based on the positioning of the terminal positioning antenna every time the vehicle runs, so as to obtain a plurality of track lines which are all displayed on a map; step 3, selecting a line which is closest to the original trajectory line on the map as a standard line; and 4, respectively calculating the standard deviation of the distance from each point on each track line to the standard line to obtain a plurality of standard deviations, and calculating the average value of the standard deviations based on the plurality of standard deviations, namely the terminal dynamic positioning precision. The invention can calculate the dynamic positioning accuracy of the terminal, thereby solving the problem that the dynamic positioning accuracy of the existing terminal can not be measured and calculated.
Description
Technical Field
The invention relates to the field of terminal positioning, in particular to a method and a system for calculating dynamic positioning accuracy of a terminal.
Background
The terminal with the GPS positioning module can conveniently acquire positioning information and display the position of the terminal, but no clear method exists in the industry how to verify the positioning accuracy under the dynamic condition. A positioning module manufacturer often provides only one piece of data with static positioning accuracy, and some users pay more attention to dynamic positioning accuracy in actual application.
Disclosure of Invention
In view of the technical defects and technical drawbacks in the prior art, embodiments of the present invention provide a method and a system for calculating dynamic positioning accuracy of a terminal, which overcome the above problems or at least partially solve the above problems, and the specific scheme is as follows:
as a first aspect of the present invention, a method for calculating dynamic positioning accuracy of a terminal is provided, where the method includes:
step 1, fixing a terminal positioning antenna on the top of a vehicle;
step 2, enabling the vehicle to repeatedly run along the planned route for multiple times, and obtaining a running track line of the vehicle based on the positioning of the terminal positioning antenna every time the vehicle runs, so as to obtain a plurality of track lines which are all displayed on a map;
step 3, selecting a line which is closest to the original trajectory line on the map as a standard line;
and 4, respectively calculating the standard deviation of the distance from each point on each track line to the standard line to obtain a plurality of standard deviations, and calculating the average value of the standard deviations based on the plurality of standard deviations to obtain the dynamic positioning precision of the terminal.
Further, in step 4, respectively calculating the standard deviation of the distance from the point on each trajectory line to the standard line is specifically: and respectively calculating the distance between the point on each track line and the standard line by combining a screen ruler tool, taking the distance between enough points on each track line and the standard line, and calculating the standard deviation of the distance between the point on each track line and the standard line by utilizing a function STDEVP in EXCEL.
Further, the calculation of the distance from the point on the trajectory line to the standard line is specifically: the method comprises the steps of taking a certain point on a trajectory line as a right-angle vertex, respectively extending upwards and rightwards, respectively crossing a standard line, respectively taking two vertexes crossing the standard line by using a screen coordinatometer, respectively naming the two vertexes as a short-edge vertex A and a long-edge vertex B, forming three vertexes of a right-angled triangle by the certain point on the trajectory line, the short-edge vertex A and the long-edge vertex B, knowing the longitude and the latitude of the three vertexes of the right-angled triangle, calculating the lengths of the three sides of the right-angled triangle, and then calculating the height on a hypotenuse, wherein the height on the hypotenuse is the distance from the trajectory point to the standard line.
Further, in the step 2, the routes of the vehicles running each time are consistent, human errors are avoided, and the running positioning track line is transmitted to the platform server after each running.
As a second aspect of the present invention, a terminal dynamic positioning accuracy calculation system is provided, where the system includes a terminal positioning antenna, a trajectory line acquisition unit, a standard line selection unit, and a calculation unit;
the terminal positioning antenna is fixed at the top of the vehicle and used for positioning the real-time position of the vehicle;
the track line acquisition unit is used for positioning in real time to obtain a track line of vehicle running based on the terminal positioning antenna when the vehicle runs along the planned route, so that the vehicle repeatedly runs along the planned route for multiple times to obtain multiple track lines which are all displayed on a map;
the standard line selecting unit is used for selecting a line which is closest to the track line on the map and is originally on the map as a standard line;
the calculating unit is used for calculating the standard deviation of the distance from each point on each track line to the standard line to obtain a plurality of standard deviations, and calculating the average value of the standard deviations based on the plurality of standard deviations to obtain the dynamic positioning precision of the terminal.
Further, calculating the standard deviation of the distance from the point to the standard line on each trajectory line specifically includes: and respectively calculating the distance between the point on each track line and the standard line by combining a screen ruler tool, taking the distance between enough points on each track line and the standard line, and calculating the standard deviation of the distance between the point on each track line and the standard line by utilizing a function STDEVP in EXCEL.
Further, the distance between the point on the trajectory line and the standard line is calculated as follows: the method comprises the steps of taking a certain point on a trajectory line as a right-angle vertex, respectively extending upwards and rightwards, respectively crossing a standard line, respectively taking two vertexes crossing the standard line by using a screen coordinatometer, respectively naming the two vertexes as a short-edge vertex A and a long-edge vertex B, forming three vertexes of a right-angled triangle by the certain point on the trajectory line, the short-edge vertex A and the long-edge vertex B, knowing the longitude and the latitude of the three vertexes of the right-angled triangle, calculating the lengths of the three sides of the right-angled triangle, and then calculating the height on a hypotenuse, wherein the height on the hypotenuse is the distance from the trajectory point to the standard line.
The invention has the following beneficial effects:
the method and the system for calculating the dynamic positioning accuracy of the terminal can obtain the dynamic positioning accuracy of the terminal, thereby solving the problem that the dynamic positioning accuracy of the existing terminal cannot be measured and calculated.
Drawings
Fig. 1 is a schematic flow chart of a method for calculating dynamic positioning accuracy of a terminal according to an embodiment of the present invention;
fig. 2 is a schematic diagram of calculating a distance from a certain point on a trajectory line to a standard line according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a method for calculating dynamic positioning accuracy of a terminal is provided as a first embodiment of the present invention, where the method includes:
step 1, fixing a terminal positioning antenna on the top of a vehicle;
step 2, enabling the vehicle to repeatedly run along the planned route for multiple times, and obtaining a running track line of the vehicle based on the positioning of the terminal positioning antenna every time the vehicle runs, so as to obtain a plurality of track lines which are all displayed on a map;
step 3, selecting a line which is closest to the original trajectory line on the map as a standard line;
and 4, respectively calculating the standard deviation of the distance from each point on each track line to the standard line to obtain a plurality of standard deviations, and calculating the average value of the standard deviations based on the plurality of standard deviations, namely the terminal dynamic positioning precision.
According to the invention, the track lines of the vehicle running are obtained through the positioning of the terminal positioning antenna, the standard deviation of the distance from each point on each track line to the standard line is calculated, and finally the terminal dynamic positioning precision is obtained through the average value of the standard deviations, so that the problem that the existing terminal dynamic positioning precision cannot be measured and calculated is solved.
In step 4, the step of calculating the standard deviation of the distance from the point on each trajectory line to the standard line is specifically as follows: and (3) respectively calculating the distance from the point on each track line to the standard line by combining a screen ruler tool, taking the distance from enough points on each track line to the standard line, and calculating the standard deviation of the distance from the point on each track line to the standard line by obtaining the distance from a plurality of points on each track line to the standard line.
Wherein, the calculation of the distance from the point on the trajectory line to the standard line is specifically as follows: the method comprises the steps of taking a certain point on a trajectory line as a right-angle vertex, respectively extending upwards and rightwards, respectively crossing a standard line, respectively taking two vertexes crossed with the standard line by using a screen coordinatometer, respectively naming the two vertexes as a short-side vertex A and a long-side vertex B, as shown in figure 2, wherein the certain point on the trajectory line, the short-side vertex A and the long-side vertex B form three vertexes of a right-angled triangle, the longitude and the latitude of any point on a map can be directly read out by a map tool, the lengths of the three sides of the right-angled triangle are obtained by knowing the longitude and latitude of the three vertexes of the right-angled triangle, then the height on a hypotenuse is obtained, and the height on the hypotenuse is the distance from the certain point on the trajectory line to the standard line.
Preferably, in step 2, the routes of the vehicles running each time are consistent, human errors are avoided, and the running positioning trajectory is transmitted to the platform server after each running.
As a second embodiment of the present invention, a terminal dynamic positioning accuracy calculation system is provided, where the system includes a terminal positioning antenna, a trajectory line acquisition unit, a standard line selection unit, and a calculation unit;
the terminal positioning antenna is fixed at the top of the vehicle and used for positioning the real-time position of the vehicle;
the track line acquisition unit is used for obtaining the track line of vehicle running based on real-time positioning of the terminal positioning antenna when the vehicle runs along the planned route, so that the vehicle repeatedly runs along the planned route for multiple times to obtain multiple track lines which are all displayed on a map;
the standard line selecting unit is used for selecting a line which is closest to the track line on the map and is originally on the map as a standard line;
the calculating unit is used for calculating the standard deviation of the distance from each point on each track line to the standard line to obtain a plurality of standard deviations, and calculating the average value of the standard deviations based on the plurality of standard deviations to obtain the dynamic positioning precision of the terminal.
Preferably, the calculation of the standard deviation of the distance from the point to the standard line on each trajectory line is specifically as follows: and (3) respectively calculating the distance from the point on each track line to the standard line by combining a screen ruler tool, taking the distance from enough points on each track line to the standard line, and calculating the standard deviation of the distance from the point on each track line to the standard line by obtaining the distance from a plurality of points on each track line to the standard line.
Preferably, the distance between the point on the trajectory line and the standard line is calculated as follows: the method comprises the steps of taking a certain point on a trajectory line as a right-angle vertex, respectively extending upwards and rightwards, respectively crossing a standard line, respectively taking two vertexes crossing the standard line by using a screen coordinatometer, respectively naming the two vertexes as a short-edge vertex A and a long-edge vertex B, forming three vertexes of a right-angled triangle by the certain point on the trajectory line, the short-edge vertex A and the long-edge vertex B, knowing the longitude and the latitude of the three vertexes of the right-angled triangle, calculating the lengths of the three sides of the right-angled triangle, and then calculating the height on a hypotenuse, wherein the height on the hypotenuse is the distance from the trajectory point to the standard line.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A method for calculating the dynamic positioning accuracy of a terminal is characterized by comprising the following steps:
step 1, fixing a terminal positioning antenna on the top of a vehicle;
step 2, enabling the vehicle to repeatedly run along the planned route for multiple times, and obtaining a running track line of the vehicle based on the positioning of the terminal positioning antenna every time the vehicle runs, so as to obtain a plurality of track lines which are all displayed on a map;
step 3, selecting a line which is closest to the original trajectory line on the map as a standard line;
and 4, respectively calculating the standard deviation of the distance from each point on each track line to the standard line to obtain a plurality of standard deviations, and calculating the average value of the standard deviations based on the plurality of standard deviations to obtain the dynamic positioning precision of the terminal.
2. The method for calculating the dynamic positioning accuracy of the terminal according to claim 1, wherein in the step 4, the step of calculating the standard deviation of the distance from the point on each trajectory line to the standard line comprises: and respectively calculating the distance between the point on each track line and the standard line by combining a screen ruler tool, taking the distance between enough points on each track line and the standard line, and calculating the standard deviation of the distance between the point on each track line and the standard line by utilizing a function STDEVP in EXCEL.
3. The method for calculating the dynamic positioning accuracy of the terminal according to claim 2, wherein the calculating the distance from the point on the trajectory line to the standard line specifically comprises: the method comprises the steps of taking a certain point on a trajectory line as a right-angle vertex, respectively extending upwards and rightwards, respectively crossing a standard line, respectively taking two vertexes crossing the standard line by using a screen coordinatometer, respectively naming the two vertexes as a short-edge vertex A and a long-edge vertex B, forming three vertexes of a right-angled triangle by the certain point on the trajectory line, the short-edge vertex A and the long-edge vertex B, and knowing the longitude and the latitude of the three vertexes of the right-angled triangle, calculating the lengths of the three sides of the right-angled triangle, and then calculating the height on a hypotenuse, wherein the height on the hypotenuse is the distance from the trajectory point to the standard line.
4. The method for calculating the dynamic positioning accuracy of the terminal according to claim 1, wherein in step 2, the routes of the vehicle in each driving are consistent, human errors are avoided, and after each driving, the driving positioning trajectory is transmitted to the platform server.
5. A terminal dynamic positioning precision calculation system is characterized by comprising a terminal positioning antenna, a trajectory line acquisition unit, a standard line selection unit and a calculation unit;
the terminal positioning antenna is fixed at the top of the vehicle and used for positioning the real-time position of the vehicle;
the track line acquisition unit is used for obtaining the track line of vehicle running based on real-time positioning of the terminal positioning antenna when the vehicle runs along the planned route, so that the vehicle repeatedly runs along the planned route for multiple times to obtain multiple track lines which are all displayed on a map;
the standard line selecting unit is used for selecting a line which is closest to the track line on the map as a standard line;
the calculating unit is used for calculating the standard deviation of the distance from each point on each track line to the standard line to obtain a plurality of standard deviations, and calculating the average value of the standard deviations based on the plurality of standard deviations to obtain the dynamic positioning precision of the terminal.
6. The system for calculating the dynamic positioning accuracy of the terminal according to claim 5, wherein the calculating the standard deviation of the distance from the point on each trajectory line to the standard line specifically comprises: and respectively calculating the distance between the point on each track line and the standard line by combining a screen ruler tool, taking the distance between enough points on each track line and the standard line, and calculating the standard deviation of the distance between the point on each track line and the standard line by utilizing a function STDEVP in EXCEL.
7. The system for calculating the dynamic positioning accuracy of the terminal according to claim 6, wherein the calculating the distance from the point on the trajectory line to the standard line specifically comprises: and taking a certain point on a trajectory line as a right-angle vertex to respectively extend upwards and rightwards and respectively intersect with the standard line, respectively taking two vertexes intersecting with the standard line by using a screen coordinatometer, respectively naming the two vertexes as a short-side vertex A and a long-side vertex B, and forming three vertexes of a right-angled triangle by the certain point on the trajectory line, the short-side vertex A and the long-side vertex B.
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