Zonal CORS Network Layout Method for Fusing Curve Elements

Abstract

The present invention discloses a method for arranging a strip-shaped CORS network by integrating curve elements. The present invention considers the curve elements of a railway, first sets the service ranges on both sides of the line, determines the positions of CORS according to the line mileage and the preset service ranges, and arranges CORS stations alternately on both sides of the line. For the CORS stations located inside the curve of the line, the station setting positions refer to the inner edges of the service ranges; for the CORS stations located outside the curve of the line, the reference line for the connection between two adjacent outer CORS stations is a straight line tangent to the outer edge of the service range. The CORS stations with similar mileage on both sides of the line are connected pairwise, and the CORS stations with similar mileage on the same side of the line are connected pairwise to construct a CORS network. The present invention can achieve the best match between the coverage range of the CORS network and the line engineering areas such as railways, and ensure the service stability of subsequent network RTK enhanced position services based on CORS.

Description

Technical Field

[0001] The present invention relates to the technical field of railway CORS station site selection, and particularly to a method for laying out a strip-shaped CORS network type integrating curve elements. Background Art

[0002] The measurement method of the GNSS continuous operation reference system (abbreviated as CORS) has high accuracy and high operation efficiency compared with the traditional measurement method, and can be observed all day long. It has been widely used in the three stages of survey and design, construction, and operation and maintenance of railway engineering survey. In the strip-shaped area along the railway, reasonably determining the CORS site selection is the primary task of CORS system construction, which will affect the coverage range of the CORS network and the utilization rate of CORS reference stations, and determines whether the CORS network can efficiently provide location services.

[0003] The mainstream method for traditional railway CORS station site selection is that operators combine the relevant CORS station construction standards of the national railway and the terrain, traffic, etc. along the railway, and specifically consider factors such as the surrounding observation environment, geological environment, maintenance conditions, and controlled projects along the line to make a comprehensive analysis and judgment. This method is prone to cause the strip-shaped CORS network to fail to cover the line area or the CORS stations to be unreasonably distributed due to the failure to fully consider the special spatial distribution characteristics of the railway, thereby affecting the service accuracy of the CORS network. In addition, the current CORS station site selection mainly targets the area with planar distribution, and there is little involvement in the optimal network type design of the railway strip-shaped CORS network. Summary of the Invention

[0004] Aiming at the above deficiencies in the prior art, the present invention provides a method for laying out a strip-shaped CORS network type integrating curve elements to solve the problem that the existing railway strip-shaped CORS network cannot cover the area along the railway in the optimal CORS station layout method due to the failure to fully consider the railway curve elements, so as to achieve the effects of improving the resource utilization rate of the CORS network and ensuring the service quality of the network RTK after completion.

[0005] In order to achieve the above invention purpose, the technical solution adopted by the present invention is as follows:

[0006] In the first aspect, the present invention proposes a method for laying out a strip-shaped CORS network type integrating curve elements, including the following steps:

[0007] A1. Set the service range boundary based on the center line of the line and the average interval mileage of CORS stations;

[0008] A2. Calculate the deviation distance of the CORS station outside the line curve from the line;

[0009] A3. Set up CORS base stations outside the line curve based on the starting mileage according to the deviation distance.

[0010] A4. Along the direction of increasing or decreasing mileage, successively set CORS base stations inside and outside the line curve until the irregular triangular network generated by the CORS base stations covers the corresponding line curve segment;

[0011] A5. Connect the CORS base stations with similar mileage on both sides of the line pairwise, and connect the CORS base stations with similar mileage on the same side of the line pairwise to construct a CORS network.

[0012] Further, the calculation method for the deviation distance of the CORS site outside the line curve in step A2 is:

[0013]

[0014] where d is the deviation distance, R is the curvature radius of the line curve, r is the set width of the buffer zone, δs is the average interval mileage of the CORS sites.

[0015] Further, step A3 includes:

[0016] Based on the starting mileage, set a CORS base station at a position deviating from the line center line by the deviation distance outside the service range boundary of the buffer zone outside the line curve.

[0017] Further, step A4 includes:

[0018] Along the direction of increasing mileage, increase the average interval mileage of the CORS sites on the previous mileage and set a CORS base station on the service range boundary of the buffer zone inside the line curve;

[0019] Then increase the average interval mileage of the CORS sites on the previous mileage and set a CORS base station at a position deviating from the line center line by the deviation distance outside the service range boundary of the buffer zone outside the line curve.

[0020] Further, step A4 includes:

[0021] Along the direction of decreasing mileage, increase the average interval mileage of the CORS sites on the previous mileage and set a CORS base station on the service range boundary of the buffer zone inside the line curve;

[0022] Then increase the average interval mileage of the CORS sites on the previous mileage and set a CORS base station at a position deviating from the line center line by the deviation distance outside the service range boundary of the buffer zone outside the line curve.

[0023] In the second aspect, the present invention also proposes a method for arranging a strip-shaped CORS network type integrating curve elements, including the following steps:

[0024] B1. Set the service range boundary based on the center line of the line and the average interval mileage of the CORS stations;

[0025] B2. Calculate the deviation distance of the CORS stations outside the line curve from the line;

[0026] B3. Set CORS base stations on the service range boundary of the buffer zone inside the line curve based on the starting mileage;

[0027] B4. Set CORS base stations successively outside and inside the line curve along the direction of increasing or decreasing mileage until the irregular triangular network generated by the CORS base stations covers the corresponding line curve segment;

[0028] B5. Connect the CORS base stations with similar mileage on both sides of the line in pairs, and connect the CORS base stations with similar mileage on the same side of the line in pairs to construct a CORS network.

[0029] Further, the calculation method of the deviation distance of the CORS stations outside the line curve from the line in step B2 is as follows:

[0030]

[0031] where d is the deviation distance, R is the curvature radius of the line curve, r is the set width of the buffer zone, and δs is the average interval mileage of the CORS stations.

[0032] Further, step B4 includes:

[0033] Along the direction of increasing mileage, increase the average interval mileage of the CORS stations on the previous mileage, and set a CORS base station at a position outside the service range boundary of the buffer zone outside the line curve and deviating from the line center line by the deviation distance;

[0034] Then increase the average interval mileage of the CORS stations on the previous mileage, and set a CORS base station on the service range boundary of the buffer zone inside the line curve.

[0035] Further, step B4 includes:

[0036] Along the direction of decreasing mileage, increase the average interval mileage of the CORS stations on the previous mileage, and set a CORS base station at a position outside the service range boundary of the buffer zone outside the line curve and deviating from the line center line by the deviation distance;

[0037] Then increase the average interval mileage of the CORS stations on the previous mileage, and set a CORS base station on the service range boundary of the buffer zone inside the line curve.

[0038] The present invention has the following beneficial effects:

[0039] Compared with the traditional method for selecting the location of CORS stations, the method for laying out the network pattern of a strip-shaped CORS network that integrates curve elements proposed by the present invention realizes the best matching between the coverage range of the CORS network and the areas of line projects such as railways by integrating the spatial distribution characteristics of curve elements and strip-shaped service areas, and solves the problem that the existing method for selecting the location of CORS stations takes personnel experience as a reference and has great uncertainty, resulting in insufficient line coverage or waste of base station resources that may be caused by insufficient consideration of line curve elements. Therefore, designing a strip-shaped CORS network through this method should be able to reduce the construction cost of the CORS network and make full use of base station resources. At the same time, since the CORS stations determined by the present invention are close to the line and the line project area is within the coverage range of the CORS network, the service stability of subsequent network RTK enhanced position services based on CORS can be guaranteed. Description of the Drawings

[0040] Figure 1 It is a schematic flow chart of the method for laying out the network pattern of a strip-shaped CORS network that integrates curve elements in Embodiment 1 of the present invention;

[0041] Figure 2 It is a schematic layout diagram of the CORS network in Embodiment 1 of the present invention;

[0042] Figure 3 It is a schematic flow chart of the method for laying out the network pattern of a strip-shaped CORS network that integrates curve elements in Embodiment 2 of the present invention;

[0043] Figure 4 It is a schematic layout diagram of the CORS network in Embodiment 2 of the present invention. Detailed Embodiments

[0044] The following describes the detailed embodiments of the present invention to facilitate those skilled in the art of the present technology to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the detailed embodiments. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0045] The basic idea of the present invention is to consider the curve elements of the railway, namely the midpoint of the curve and the radius of curvature. First, set the service ranges on both sides of the line according to the curve, determine the positions of the CORS based on the line mileage and the preset service range, and distribute the CORS stations alternately on both sides of the line. For the CORS stations located inside the curve of the line, the station location is referenced to the inner edge of the service range; for the CORS stations located outside the curve of the line, the reference line for the connection of two adjacent outer CORS stations is a straight line tangent to the outer edge of the service range. The CORS stations with similar mileage on both sides of the line are connected pairwise, and the CORS stations with similar mileage on the same side of the line are connected pairwise to construct a CORS network.

[0046] Embodiment 1

[0047] As Figure 1 shown, the embodiment of the present invention provides a method for laying out a strip-shaped CORS network integrating curve elements, including the following steps A1 to A7:

[0048] A1. Set the service range boundary based on the center line of the line and the average interval mileage of the CORS stations;

[0049] In an optional embodiment of the present invention, with the center line of the line as a reference, a buffer zone with a width of r from the center line is set as the service range boundaries on both the left and right sides, and the mileage of the midpoint of the curve is s0, the radius of curvature of the circular curve is R, and the average interval mileage of the CORS stations is δs.

[0050] A2. Calculate the deviation distance of the CORS stations outside the line curve from the line;

[0051] In an optional embodiment of the present invention, according to the curve elements of the line determined in step A1, calculate the deviation distance of the CORS stations outside the line curve from the line. The calculation method is as follows:

[0052]

[0053] where d is the deviation distance, R is the radius of curvature of the line curve, r is the set width of the buffer zone, δs is the average interval mileage of the CORS stations.

[0054] A3. Based on the starting mileage, set the CORS base stations outside the line curve according to the deviation distance;

[0055] In an optional embodiment of the present invention, two point selection methods are adopted according to the relative relationship between the CORS stations and the line curve. For the site selection of the CORS stations inside the line curve, the buffer zone boundary is used as a reference for point selection; outside the line curve, the buffer zone boundary tangent line is used as a reference, and points are selected on both sides of the tangent point.

[0056] The present invention takes the mid - point of the line curve as the starting mileage s0, and sets up a CORS base station, such as point 1, at a position deviating from the line center line by a distance d outside the service range boundary of the buffer zone on the outer side of the line curve.

[0057] A4. Along the direction of increasing or decreasing mileage, CORS base stations are sequentially set up on the inner side and the outer side of the line curve until the irregular triangular network generated by the CORS base stations covers the corresponding line curve section;

[0058] In an alternative embodiment of the present invention, along the direction of increasing mileage, the average interval mileage of CORS stations is increased on the previous mileage, that is, at a mileage of s0 + δs, a CORS base station is set up on the service range boundary of the buffer zone on the inner side of the line curve, such as point 2; then the average interval mileage of CORS stations is increased on the previous mileage s0 + δs, that is, at a mileage of s0 + 2δs, a CORS base station is set up at a position deviating from the line center line by a distance d outside the service range boundary of the buffer zone on the outer side of the line curve, such as point 4; and so on. Points are sequentially arranged on both sides of the line. The distance of the points arranged on the inner side of the line curve deviating from the line center line refers to r, and the distance of the points arranged on the inner side of the line curve deviating from the line center line refers to d.

[0059] The setting method in the direction of decreasing mileage is similar to that in the direction of increasing mileage, that is, along the direction of decreasing mileage, the average interval mileage of CORS stations is reduced on the previous mileage, that is, at a mileage of s0 - δs, a CORS base station is set up on the service range boundary of the buffer zone on the inner side of the line curve, such as point 3; then the average interval mileage of CORS stations is reduced on the previous mileage s0 - δs, that is, at a mileage of s0 - 2δs, a CORS base station is set up at a position deviating from the line center line by a distance d outside the service range boundary of the buffer zone on the outer side of the line curve. And so on. Points are sequentially arranged on both sides of the line. The distance of the points arranged on the inner side of the line curve deviating from the line center line refers to r, and the distance of the points arranged on the inner side of the line curve deviating from the line center line refers to d.

[0060] The present invention extends the CORS network in the up - line and down - line directions of the route by the above - mentioned method until the irregular triangular network generated by the CORS stations covers the corresponding railway survey section.

[0061] A5. Connect two by two the CORS base stations with similar mileage on both sides of the line, and connect two by two the CORS base stations with similar mileage on the same side of the line to construct a CORS network.

[0062] In an alternative embodiment of the present invention, starting from the midpoint of the curve of the present invention, taking the offset d greater than the buffer radius on the outer side of the arc at the mileage of the midpoint of the line curve as the No. 1 base station, select the No. 2 base station and the No. 3 base station on the buffer boundary on the opposite side of the No. 1 station, and then draw a tangent from the No. 1 station to the buffer boundary on its same side to determine the No. 4 base station. In the same way, extend the CORS network along the upstream and downstream directions of the route until the irregular triangular network generated by the CORS stations covers the corresponding railway survey section. Connect the CORS stations with similar mileage on both sides of the line in pairs, and connect the CORS stations with similar mileage on the same side of the line in pairs to construct a CORS network, as Figure 2 shown.

[0063] Embodiment 2

[0064] As Figure 3 shown, the embodiment of the present invention also provides a method for arranging a strip-shaped CORS network type integrating curve elements, including the following steps:

[0065] B1. Set the service range boundary based on the center line of the line and the average interval mileage of the CORS stations;

[0066] B2. Calculate the deviation distance of the CORS stations outside the line curve from the line;

[0067] B3. Set the CORS base station on the service range boundary of the buffer inside the line curve based on the starting mileage;

[0068] B4. Set the CORS base stations on the outside and inside of the line curve in turn along the increasing and decreasing directions of the mileage until the irregular triangular network generated by the CORS base stations covers the corresponding line curve segment;

[0069] B5. Connect the CORS base stations with similar mileage on both sides of the line in pairs, and connect the CORS base stations with similar mileage on the same side of the line in pairs to construct a CORS network.

[0070] This embodiment is similar to Embodiment 1 and will not be elaborated here. The difference between the two is that in this embodiment, the position where the inner side of the arc is set on the buffer boundary at the mileage of the midpoint of the line curve is used as the No. 1 base station. Draw a tangent on the buffer boundary on the opposite side of the No. 1 point, select the No. 2 and No. 3 base stations on both sides of the tangent point, and then select the No. 4 point on the buffer boundary on the same side of the No. 1 base station, that is, on the opposite side of the No. 2 and No. 3 base stations. In the same way, extend the CORS network along the upstream and downstream directions of the route until the irregular triangular network generated by the CORS stations can cover the corresponding railway curve segment. Connect the CORS stations with similar mileage on both sides of the line in pairs, and connect the CORS stations with similar mileage on the same side of the line in pairs to construct a CORS network, as Figure 4 shown.

[0071] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and combinations of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device generate means for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or in multiple blocks.

[0072] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means that implement the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or in multiple blocks.

[0073] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or in multiple blocks.

[0074] Specific embodiments are applied in the present invention to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

[0075] Those of ordinary skill in the art will realize that the embodiments described herein are for helping readers understand the principles of the present invention, and it should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific deformations and combinations that do not depart from the essence of the present invention based on the technical revelations disclosed in the present invention, and these deformations and combinations are still within the protection scope of the present invention.

Claims

1. A method for laying out a strip-shaped CORS network type that integrates curve elements, characterized in that, It includes the following steps: A1. Set the service range boundary based on the center line of the line and the average interval mileage of the CORS stations; A2. Calculate the deviation distance of the CORS stations outside the line curve from the line according to the line curve radius, buffer width and average interval mileage. The calculation method is: Among them, d is the deviation distance, R is the radius of curvature of the line curve, r is the set width of the buffer zone, , is the average interval mileage of CORS stations; A3. Based on the starting mileage, set up CORS base stations outside the service range boundary of the buffer zone on the outside of the line curve according to the deviation distance; A4. Along the increasing or decreasing direction of the mileage, alternately set up CORS base stations inside and outside the line curve until the irregular triangular network generated by the CORS base stations covers the corresponding line curve segment; A5. Connect the CORS base stations with similar mileage on both sides of the line in pairs, and connect the CORS base stations with similar mileage on the same side of the line in pairs to construct a CORS network.

2. The method for arranging a strip-shaped CORS network type by fusing curve elements according to claim 1, characterized in that Step A3 includes: Based on the starting mileage, set up a CORS base station at a position deviating from the line center line by the deviation distance outside the service range boundary of the buffer zone on the outside of the line curve.

3. The method for arranging a strip-shaped CORS network type by fusing curve elements according to claim 1, characterized in that, Step A4 includes: Along the increasing direction of the mileage, increase the average interval mileage of the CORS stations on the previous mileage, and set up a CORS base station on the service range boundary of the buffer zone inside the line curve; Then increase the average interval mileage of the CORS stations on the previous mileage, and set up a CORS base station at a position deviating from the line center line by the deviation distance outside the service range boundary of the buffer zone on the outside of the line curve.

4. The method for arranging a strip-shaped CORS network type by fusing curve elements according to claim 1, characterized in that, Step A4 includes: Along the decreasing direction of the mileage, increase the average interval mileage of the CORS stations on the previous mileage, and set up a CORS base station on the service range boundary of the buffer zone inside the line curve; Then increase the average interval mileage of the CORS stations on the previous mileage, and set up a CORS base station at a position deviating from the line center line by the deviation distance outside the service range boundary of the buffer zone on the outside of the line curve.

5. A method for arranging a strip-shaped CORS network type that integrates curve elements, characterized in that, It includes the following steps: B1. Set the service range boundary based on the center line of the line and the average interval mileage of the CORS stations; B2. Calculate the deviation distance of the CORS stations outside the line curve from the line according to the line curve radius, buffer width and average interval mileage. The calculation method is: Among them, d is the deviation distance, R is the radius of curvature of the line curve, r is the set width of the buffer zone, , is the average interval mileage of CORS stations; B3. Based on the starting mileage, set up a CORS base station on the service range boundary of the buffer zone inside the line curve; B4. Along the increasing or decreasing direction of the mileage, sequentially set up CORS base stations outside and inside the line curve until the irregular triangular network generated by the CORS base stations covers the corresponding line curve segment; B5. Connect the CORS base stations with similar mileage on both sides of the line in pairs, and connect the CORS base stations with similar mileage on the same side of the line in pairs to construct a CORS network.

6. The method for arranging a strip-shaped CORS network type by fusing curve elements according to claim 5, characterized in that, Step B4 includes: Along the increasing direction of the mileage, increase the average interval mileage of the CORS stations on the previous mileage, and set up a CORS base station at a position deviating from the line center line by the deviation distance outside the service range boundary of the buffer zone on the outside of the line curve; Then increase the average interval mileage of the CORS stations on the previous mileage, and set up a CORS base station on the service range boundary of the buffer zone inside the line curve.

7. The method for arranging a strip-shaped CORS network type by fusing curve elements according to claim 5, characterized in that, Step B4 includes: Along the mileage reduction direction, increase the average interval mileage of CORS stations on the previous mileage. Set up CORS base stations at positions deviating from the center line of the line by the deviation distance outside the service range boundary of the buffer zone on the outer side of the line curve. Then increase the average interval mileage of CORS stations on the previous mileage. Set up CORS base stations on the service range boundary of the buffer zone on the inner side of the line curve.

Images