Positioning method and device for measuring gross error of lead, storage medium and terminal equipment

Abstract

The invention discloses a measurement lead gross error positioning method and device, a storage medium and terminal equipment, and the method comprises the steps: marking a measurement station at one end of a measurement lead as an initial control point, and marking a measurement station at the other end as a tail control point; calculating coordinates of each observation station in the measurement traverse according to a branch traverse calculation method from the start control point, and further determining a first coordinate closure error of the end control point; starting from the tail control point, calculating coordinates of each observation station according to a branch traverse calculation method, and further determining a second coordinate closing error of the starting control point; and according to the ratio of the first coordinate closure error to the second coordinate closure error, the first distance between each observation station on the measurement traverse and the tail control point, and the second distance between each observation station and the initial control point, determining a gross error observation station which generates gross error. The scheme provided by the invention is simple in positioning method, small in calculation amount, higher in efficiency and convenient for field operation personnel to flexibly use.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering surveying, and particularly relates to a method, device, storage medium and terminal device for measuring and locating gross errors of a traverse. Background Art

[0002] Traverse surveying is a commonly used method for establishing a small-area plane control network, which is applicable to building areas with complex ground features, concealed areas that are flat but have poor visibility conditions, or strip areas. In traverse observation surveying, due to reasons such as instrument jolting, incorrect control points set on the equipment, equipment misoperation, or instrument failure, gross errors will be introduced into the traverse observation, resulting in the overlimit of the traverse closing error and affecting the traverse adjustment. A traverse generally consists of multiple survey stations, and it is impossible to determine the survey station where the gross error occurs. Since the workload of re-observing the entire traverse is large, it is necessary to find the faulty survey station through gross error detection and supplement the data of this survey station. Currently, relatively classic gross error detection methods mainly include the Barda gross error detection method, robust estimation, etc.

[0003] The existing gross error detection methods have rigorous mathematical logic, but the mathematical models are relatively complex, with a large amount of calculation and low efficiency, which is not conducive to the flexible application of on-site operators. Summary of the Invention

[0004] Embodiments of the present invention provide a method, device, storage medium and terminal device for measuring and locating gross errors of a traverse, with a simple positioning method, small amount of calculation, higher efficiency, and being convenient for on-site operators to utilize flexibly.

[0005] Embodiments of the present invention provide a method for measuring and locating gross errors of a traverse, and the method includes:

[0006] Mark the survey station at one end of the measured traverse as the starting control point, and the survey station at the other end as the ending control point;

[0007] Starting from the starting control point, calculate the coordinates of each survey station in the measured traverse according to the method of calculating a connecting traverse, and then determine the first coordinate closing error of the ending control point;

[0008] Starting from the ending control point, calculate the coordinates of each survey station according to the method of calculating a connecting traverse, and then determine the second coordinate closing error of the starting control point;

[0009] Determine the gross error survey station where the gross error occurs according to the ratio of the first coordinate closing error to the second coordinate closing error, the first distance between each survey station on the measured traverse and the ending control point, and the second distance between each survey station and the starting control point.

[0010] Preferably, determining the gross error station where the gross error occurs according to the ratio of the first coordinate closure error to the second coordinate closure error, the first distances between the stations on the measurement traverse and the last control point, and the second distances between the stations and the starting control point specifically includes:

[0011] Calculating the closure ratio of the first coordinate closure error to the second coordinate closure error;

[0012] Calculating the first distances between the stations on the measurement traverse and the last control point, and the second distances between the stations and the starting control point;

[0013] Calculating the side ratio of the first distance to the second distance of each station on the measurement traverse;

[0014] Determining the gross error station where the gross error occurs according to the difference between the side ratio of each station on the measurement traverse and the closure ratio.

[0015] Preferably, calculating the first distances between the stations on the measurement traverse and the last control point, and the second distances between the stations and the starting control point specifically includes:

[0016] Correspondingly calculating the mean coordinates of each station according to the first coordinates of each station calculated starting from the starting control point and the second coordinates of each station calculated starting from the last control point;

[0017] Calculating the first distance between the mean coordinate of each station and the coordinate of the last control point, and the second distance between the mean coordinate of each station and the coordinate of the starting control point.

[0018] Preferably, determining the gross error station where the gross error occurs according to the difference between the side ratio of each station on the measurement traverse and the closure ratio specifically includes:

[0019] Calculating the difference between the side ratio of each station on the measurement traverse and the closure ratio;

[0020] Determining the station with the smallest difference in the measurement traverse as the gross error station.

[0021] Preferably, determining the gross error station where the gross error occurs according to the difference between the side ratio of each station on the measurement traverse and the closure ratio specifically includes:

[0022] Correspondingly calculating the calculation deviation of each station according to the first coordinates of each station calculated starting from the starting control point and the second coordinates of the corresponding stations calculated starting from the last control point, and marking the station with the smallest calculation deviation as the preliminary determination station;

[0023] Taking the preliminary determination station as the center, respectively determining a continuous preset first number of stations on both sides of it as the stations to be verified;

[0024] Calculate the difference between the side ratio of the initially determined measuring station and each measuring station to be verified and the closing ratio respectively.

[0025] When the difference of the initially determined measuring station is less than a preset first threshold, and the differences of the measuring stations to be verified on both sides thereof show an increasing distribution in the order of gradually moving away from the initially determined measuring station, determine the initially determined measuring station as the gross error measuring station.

[0026] Preferably, determining the gross error measuring station where the gross error occurs according to the ratio of the first coordinate closing error to the second coordinate closing error, the first distance between each measuring station on the measuring wire and the last control point, and the second distance between each measuring station and the starting control point specifically includes:

[0027] According to the first coordinates of each measuring station calculated starting from the starting control point and the second coordinates of the corresponding measuring stations calculated starting from the last control point, calculate the calculation deviation of each measuring station correspondingly, and mark the measuring station with the smallest calculation deviation as the initially determined measuring station;

[0028] Calculate the closing ratio of the first coordinate closing error to the second coordinate closing error;

[0029] Calculate the side ratio of the first distance to the second distance of the initially determined measuring station, and calculate the initial difference between the side ratio of the initially determined measuring station and the closing ratio;

[0030] When the initial difference is less than a preset second threshold, determine the initially determined measuring station as the gross error measuring station.

[0031] Preferably, starting from the starting control point, calculating the coordinates of each measuring station in the measuring wire according to the calculation method of the connecting traverse, and further determining the first coordinate closing error of the last control point includes:

[0032] Starting from the starting control point, according to the side lengths and angle observation values of each measuring station, sequentially calculate the coordinates of each measuring station until the coordinates of the last control point are calculated;

[0033] Calculate the offset between the calculated coordinates of the last control point and its actual coordinates, which is the first coordinate closing error of the last control point. An embodiment of the present invention provides a device for positioning gross errors in a measuring wire, and the device includes:

[0034] A marking module, configured to mark the measuring station at one end of the measuring wire as the starting control point and the measuring station at the other end as the last control point;

[0035] A first calculation module, configured to calculate the coordinates of each measuring station in the measuring wire according to the calculation method of the connecting traverse starting from the starting control point, and further determine the first coordinate closing error of the last control point;

[0036] A second calculation module, configured to calculate the coordinates of each measuring station starting from the end control point according to the connecting traverse calculation method, and further determine the second coordinate closing error of the start control point;

[0037] An outlier module, configured to determine an outlier measuring station where an outlier occurs according to the ratio of the first coordinate closing error to the second coordinate closing error, the first distance between each measuring station on the measuring traverse and the end control point, and the second distance between each measuring station and the start control point.

[0038] Preferably, the outlier module is specifically configured to:

[0039] Calculate the closing ratio of the first coordinate closing error to the second coordinate closing error;

[0040] Calculate the first distance between each measuring station on the measuring traverse and the end control point, and the second distance between each measuring station and the start control point;

[0041] Calculate the side ratio of the first distance to the second distance of each measuring station on the measuring traverse;

[0042] Determine the outlier measuring station where an outlier occurs according to the difference between the side ratio of each measuring station on the measuring traverse and the closing ratio.

[0043] Preferably, the outlier module is further specifically configured to:

[0044] Calculate the mean coordinates of each measuring station according to the first coordinates of each measuring station calculated starting from the start control point and the second coordinates of the corresponding measuring stations calculated starting from the end control point;

[0045] Calculate the first distance between the mean coordinates of each measuring station and the coordinates of the end control point, and the second distance between the mean coordinates of each measuring station and the coordinates of the start control point.

[0046] Preferably, the outlier module is further specifically configured to:

[0047] Calculate the difference between the side ratio of each measuring station on the measuring traverse and the closing ratio;

[0048] Determine the measuring station with the smallest difference in the measuring traverse as the outlier measuring station.

[0049] Preferably, the outlier module is further specifically configured to:

[0050] Calculate the calculation deviation of each measuring station according to the first coordinates of each measuring station calculated starting from the start control point and the second coordinates of the corresponding measuring stations calculated starting from the end control point, and mark the measuring station with the smallest calculation deviation as the preliminary determined measuring station;

[0051] Taking the initially determined measuring station as the center, respectively determine a first quantity of continuously preset measuring stations on both sides of it as the measuring stations to be verified;

[0052] Respectively calculate the difference between the side ratio of the initially determined measuring station and each measuring station to be verified and the closing ratio;

[0053] When the difference of the initially determined measuring station is less than a preset first threshold, and the differences of the measuring stations to be verified on both sides thereof are distributed in an increasing order according to the order of being farther away from the initially determined measuring station, determine the initially determined measuring station as the gross error measuring station.

[0054] Preferably, the gross error module is specifically configured to:

[0055] According to the first coordinates of each measuring station calculated starting from the initial control point, and the second coordinates of the corresponding measuring stations calculated starting from the end control point, respectively calculate the calculation deviation of each measuring station, and mark the measuring station with the smallest calculation deviation as the initially determined measuring station;

[0056] Calculate the closing ratio of the first coordinate closing error and the second coordinate closing error;

[0057] Calculate the side ratio of the first distance and the second distance of the initially determined measuring station, and calculate the initial difference between the side ratio of the initially determined measuring station and the closing ratio;

[0058] When the initial difference is less than a preset second threshold, determine the initially determined measuring station as the gross error measuring station.

[0059] Preferably, the first calculation module is specifically configured to:

[0060] Starting from the initial control point, according to the side lengths and angle observation values of each measuring station, sequentially calculate the coordinates of each measuring station until the coordinates of the end control point are calculated;

[0061] Calculate the offset between the calculated coordinate of the end control point and its actual coordinate, which is the first coordinate closing error of the end control point. An embodiment of the present invention also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program runs, it controls the device where the computer-readable storage medium is located to execute the measuring wire gross error positioning method described in any one of the above embodiments.

[0062] An embodiment of the present invention also provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the measuring wire gross error positioning method described in any one of the above embodiments.

[0063] The present invention provides a method, device, storage medium and terminal device for measuring and locating gross errors in a traverse. By marking the survey station at one end of the measuring traverse as the starting control point and the survey station at the other end as the ending control point; starting from the starting control point, calculating the coordinates of each survey station in the measuring traverse according to the method for calculating a connecting traverse, and further determining the first coordinate closing error of the ending control point; starting from the ending control point, calculating the coordinates of each survey station according to the method for calculating a connecting traverse, and further determining the second coordinate closing error of the starting control point; according to the ratio of the first coordinate closing error to the second coordinate closing error, the first distance between each survey station on the measuring traverse and the ending control point, and the second distance between each survey station and the starting control point, determining the survey station with gross error. The positioning method provided by this application is simple, with a small amount of calculation, higher efficiency, and is convenient for on-site operators to use flexibly. Description of the Drawings

[0064] Figure 1 is a schematic flow chart of a method for measuring and locating gross errors in a traverse provided by an embodiment of the present invention;

[0065] Figure 2 is a schematic diagram of a measuring traverse provided by an embodiment of the present invention

[0066] Figure 3 is a schematic diagram of gross errors in a measuring traverse provided by an embodiment of the present invention;

[0067] Figure 4 is another schematic diagram of gross errors in a measuring traverse provided by an embodiment of the present invention;

[0068] Figure 5 is a schematic diagram of the principle of a method for measuring and locating gross errors in a traverse provided by an embodiment of the present invention;

[0069] Figure 6 is another schematic diagram of the principle of a method for measuring and locating gross errors in a traverse provided by an embodiment of the present invention;

[0070] Figure 7 is another schematic diagram of the principle of a method for measuring and locating gross errors in a traverse provided by an embodiment of the present invention;

[0071] Figure 8 is a schematic structural diagram of a device for measuring and locating gross errors in a traverse provided by an embodiment of the present invention;

[0072] Figure 9 is a schematic diagram of a terminal device provided by an embodiment of the present invention. Detailed Embodiments

[0073] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0074] Measuring wires generally include connecting wires, closed wires, etc. In the present invention, a connecting wire is taken as an example for illustration. See Figure 1 , which is a schematic structural diagram of a connecting wire provided by an embodiment of the present invention. The two ends of the wire are control sides, and each control side is composed of two survey stations as control points, that is, control side k1-k2 and control side k3-k4. Between the two groups of control sides, several wire sides are connected. 1-6 in the figure represent wire points, that is, survey stations. The measurement work of the wire can start from control points k1 and k2, and be observed station by station, and finally close to control points k3 and k4. Since the measured observation values all have errors, there will be a certain angular closure error and coordinate closure error when closing to k3 and k4. Generally, the angular closure error and coordinate closure error will be relatively small and meet the tolerance requirements of the wire. However, if there are gross errors in the observed values, that is, relatively large deviations will occur during the measurement of a certain survey station, then the angular closure error and coordinate closure error at the final closing point will exceed the limit, resulting in errors in the calculation of the coordinate results of the wire points. Therefore, it is necessary to find out the gross error observed values for remeasurement.

[0075] The algorithms for detecting gross errors in existing solutions have huge computational amounts and the calculation processes are relatively cumbersome, which is not conducive to actual detection by operators.

[0076] An embodiment of the present invention provides a method for locating gross errors in a measuring wire. See Figure 1 shown, which is a schematic flow diagram of a method for locating gross errors in a measuring wire provided by an embodiment of the present invention, including steps S1 to S4:

[0077] Step S1, mark the survey station at one end of the measuring wire as the starting control point, and mark the survey station at the other end as the ending control point;

[0078] Step S2, starting from the starting control point, calculate the coordinates of each survey station in the measuring wire according to the calculation method of a connecting wire, and then determine the first coordinate closure error of the ending control point;

[0079] Step S3, starting from the ending control point, calculate the coordinates of each survey station according to the calculation method of a connecting wire, and then determine the second coordinate closure error of the starting control point;

[0080] Step S4: Determine the gross error station where the gross error occurs based on the ratio of the first coordinate closing error to the second coordinate closing error, the first distances from each measuring station on the measuring wire to the last control point, and the second distances from each measuring station to the starting control point.

[0081] In the specific implementation of this embodiment, determine the starting control point and the last control point according to the wire to be measured, that is, mark the measuring station at one end of the measuring wire as the starting control point, and the measuring station at the other end as the last control point. In this embodiment, refer to Figure 2 , which is a schematic diagram of the measuring wire provided by the embodiment of the present invention. k1 therein can be marked as the starting control point, and k4 as the last control point. Other measuring stations in the measuring wire, including k2 and k3, are all used as measuring stations in the measuring wire.

[0082] Starting from the starting control point, that is, starting from the control wire k1 - k2, calculate the coordinates of the remaining wire points according to the method of traversing calculation (i.e., the angular closing error and the coordinate closing error are not involved in the assignment), refer to Figure 3 , which is a schematic diagram of the gross error of the measuring wire provided by the embodiment of the present invention. There is a gross error in the angular observation value ∠123 at measuring station 2 in the figure. The observed angle is smaller than the true angle by a, resulting in the rotation of the subsequent wire starting from wire side 2 - 3. The rotation angle is a, resulting in the offset of the virtual measuring stations 3' to 6' and the virtual control point k3' from the actual coordinates, and finally resulting in the offset of the position of the end control point k4' from the true end control point k4. The offset distance is D1, that is, determine the first coordinate closing error of the last control point;

[0083] In actual measurement work, through data calculation and processing, the coordinate closing error D1 at the end can be obtained, but it is not known which measuring station's observation value has a problem. Therefore, it is necessary to find out the measuring station with a gross error.

[0084] Furthermore, in this case, starting from the last control point, calculate the coordinates of each measuring station according to the traversing calculation method, refer to Figure 4 , which is another schematic diagram of the gross error of the measuring wire provided by the embodiment of the present invention. Starting from the control points k3 and k4, calculate the coordinates of the remaining wire points, including the coordinates of the virtual control points k1' and k2', according to the traversing calculation method starting from the last control point k4. Since the angular observation value ∠123 is smaller than the true angle by a, the subsequent wire 2, 1, k2, k1 rotates together starting from wire side 2 - 1. The rotation angle is a, generating a virtual measuring station 1', and the coordinates of the control points k1' and k2' and the virtual end control point k1 have an offset D2 compared with the true end control point k1, that is, obtain the second coordinate closing error D2.

[0085] Put the measurement results of the two-way traversing on one graph, that is, Figure 3 ,Figure 4 Put them in the same figure, and we can get Figure 5 , Figure 5 which is a schematic diagram of the principle of the method for measuring and locating gross errors of a wire provided by an embodiment of the present invention.

[0086] By adding auxiliary lines 2-k4′ and 2-k4, we can get Figure 6 , Figure 6 which is another schematic diagram of the principle of the method for measuring and locating gross errors of a wire provided by an embodiment of the present invention. The length of the auxiliary line 2-k4′ is set as S1, and the length of the auxiliary line 2-k4 is set as S2. Since the auxiliary line 2-k4′ is formed by rotating the auxiliary line 2-k4 by an angle a, so S1 = S2. The three sides of S1, S2, and D1 form an isosceles triangle. Similarly, Figure 4 can also be simplified. Furthermore, it can be obtained that the length of the auxiliary line 2-k1′ is set as S3, and the length of the auxiliary line 2-k1 is set as S4. Since the auxiliary line 2-k1′ is formed by rotating the auxiliary line 2-k1 by an angle a, so S3 = S4.

[0087] Therefore, we can get Figure 7 , Figure 7 which is yet another schematic diagram of the principle of the method for measuring and locating gross errors of a wire provided by an embodiment of the present invention.

[0088] The triangles formed by the stations k1′, k1, and 2 and the triangles formed by the stations k4′, k4, and 2 are all isosceles triangles with the vertex angle a, that is, the triangles formed by the stations k1′, k1, and 2 and the triangles formed by the stations k4′, k4, and 2 are similar triangles. According to the law of similar triangles, there is This law is only applicable to the station 2 where gross errors occur. For other stations, since they do not conform to the similarity law, they do not conform to this law, and the ratio between the two is not the same.

[0089] Therefore, when conducting the inspection, based on the ratio of the first coordinate closing error D1 to the second coordinate closing error D2, the first distance between each station on the measurement wire and the last control point, and the second distance of the initial control point, the gross error station where gross errors occur is determined based on the above law.

[0090] It should be noted that based on the above principle, those skilled in the art can determine the application method for specifically determining the gross error station according to the actual inspection.

[0091] In view of the problems of the existing gross error detection algorithms such as complex mathematical models, large computational workload, and the need for programming implementation, the algorithm proposed by the present invention has a simple mathematical model, small computational amount, and is convenient for front-line operators to quickly master and apply.

[0092] In another embodiment provided by the present invention, the step S4 specifically includes:

[0093] In actual measurement work, D1 and D2 can be obtained through calculation, while S1 and S3 that meet the relationship are unknown and need to be checked one by one to find S1 and S3.

[0094] Calculate the closing ratio of the first coordinate closing error D1 and the second coordinate closing error D2

[0095] Since S1 may be side 1-k4′, side 2-k4′, side 3-k4′, side 4-k4′, etc., and the corresponding S3 may be side 1-k1′, side 2-k1′, side 3-k1′, side 4-k1′, etc., it is necessary to calculate them separately etc.;

[0096] According to the difference between the ratio of each side and the closing ratio to determine the station closest to to determine the gross error station where the gross error occurs.

[0097] In the above principle, there are absolute similar triangles. However, in the actual measurement process, since small errors will also occur at other stations, therefore, and will not be exactly equal, and the two values will be close.

[0098] By calculating the difference between the side ratio of each station and the closing ratio, find the smallest difference among them, so as to determine the optimal gross error station.

[0099] In another embodiment provided by the present invention, when calculating the first distance between each station and the end control point and the second distance between each station and the start control point, due to two calculation processes, the coordinates of each station are different in the two calculation processes. Therefore, when calculating the first distance and the second distance:

[0100] Determine the first coordinates of each station calculated starting from the start control point, see Figure 3 1, 2, 3′, 4′, 5′, 6′, k3′, k4′ in.

[0101] Determine the second coordinates of each station calculated starting from the end control point, see Figure 4 6, 5, 4, 3, 2, 1′, k2′, k1′ in.

[0102] Calculate the mean coordinates according to the first coordinates and the second coordinates of each station, and obtain the mean coordinates (1′ + 1) / 2, 2, (3′ + 3) / 2, (4′ + 4) / 2, (5′ + 5) / 2, (6′ + 6) / 2.

[0103] Calculate the first distance between the mean coordinates of each measuring station and the coordinates of the end control point, as well as the second distance between the mean coordinates of each measuring station and the coordinates of the starting control point.

[0104] Through the calculation of the mean coordinates, ensure the accuracy of the calculated first distance and second distance, and reduce the influence of the error between the two measurements.

[0105] In another embodiment provided by the present invention, when specifically determining the gross error measuring station, it specifically includes:

[0106] Calculate the difference between the side ratio and the closing ratio of each measuring station in the measuring wire ;

[0107] Determine the measuring station with the smallest difference, which is the one closest to , then the corresponding measuring station is the gross error measuring station. For example, in this case represents that measuring station 2 is the gross error measuring station. In reality, because all observed values have errors, therefore and will not be exactly equal, and the two values will be relatively close.

[0108] In another embodiment provided by the present invention, when determining the gross error measuring station, the following method can also be used to improve efficiency.

[0109] Since there are many traverse points, calculating one by one and other workloads are relatively large; generally, the coordinates of the traverse points deduced by two groups of connecting traverse can be analyzed and located respectively, that is, calculate the offsets of the same-name points on the two connecting traverses respectively.

[0110] Determine the first coordinates of each measuring station calculated starting from the starting control point, see Figure 3 k1, k2, 1, 2, 3′, 4′, 5′, 6′, k3′, k4′ in

[0111] Determine the second coordinates of each measuring station calculated starting from the end control point, see Figure 4 k4, k3, 6, 5, 4, 3, 2, 1′, k2′, k1′ in

[0112] Taking the initially determined measuring station as the center, determine a continuous preset first number of measuring stations on both sides of it as the measuring stations to be verified; for example, determine the measuring stations k2, 1, 3, and 4 around the measuring station 2 with the smallest deviation as the measuring stations to be verified;

[0113] Calculate the differences between the side ratios of the initially determined survey station and each survey station to be verified and the closure ratio respectively, that is, calculate the differences between the side ratios and the closure ratio of k2, 1, 3, and 4.

[0114] When the difference between the side ratio and the closure ratio of the initially determined survey station is less than a preset first threshold, and the differences of the survey stations to be verified on both sides thereof are distributed in an increasing order in the order of gradually moving away from the initially determined survey station. For example, when the difference of survey station 2 is less than 0.05, and the differences of survey stations 1 and 3 are greater than the difference of survey station 2, the difference of survey station k2 is greater than the difference of survey station 1, and the difference of survey station 4 is greater than the difference of survey station 3. At this time, it indicates that the difference at the survey station with the smallest deviation is very small and is at an extreme value. Then, the initially determined survey station is determined as the gross error survey station.

[0115] In another embodiment provided by the present invention, the process of determining the gross error survey station can also be carried out through the following steps:

[0116] Since there are many traverse points, the workload of calculating one by one is relatively large; generally, the coordinates of the traverse points respectively deduced by two groups of connecting traverses can be analyzed and located, that is, the offsets of the same-name points on the two connecting traverses are calculated respectively.

[0117] Determine the first coordinates of each survey station calculated starting from the initial control point, see Figure 3 k2, 1, 2, 3′, 4′, 5′, 6′, k3′, k4′ in

[0118] Determine the second coordinates of each survey station calculated starting from the final control point, see Figure 2 k4, k3, 6, 5, 4, 3, 2, 1′, k2′, k1′ in

[0119] Calculate the offsets of the same-name points on the two connecting traverses respectively. The point with the smallest offset is the potential gross error point. The offsets at both ends of the same-name points of the two connecting traverses are the largest, such as D1. The offsets of the middle same-name points gradually decrease, and finally the offset is the smallest at survey station 2. Theoretically, the two connecting traverses should completely coincide at survey station 2. However, because there are also errors in other observed values, there will actually be a certain deviation between the two connecting traverses at survey station 2. After determining that survey station 2 is the survey station to be determined for gross error, survey station 2 cannot be directly regarded as the gross error survey station.

[0120] Further verification is required, that is, calculate the side length ratio Whether it is close to ;

[0121] If the ratio And If there is a large difference, it indicates that there are more than two gross errors in the wire. Due to the mutual interference of the two gross errors, it will be difficult to determine the positions of the gross errors.

[0122] When the initially determined difference (i.e., ) is less than a preset second threshold, for example, when the difference at measuring station 2 is less than 0.01, at this time the difference is very small and is mainly caused by the observation errors of other measuring stations. At this time, the initially determined measuring station can be determined as the gross error measuring station.

[0123] In another embodiment provided by the present invention, calculating the coordinates of each measuring station in the measuring wire according to the traverse wire calculation method, and the process of calculating the coordinate closing error includes the following steps:

[0124] Starting from the initial control side (k1 - k2), according to the observed values of the side lengths and angles of each measuring station, successively calculate the coordinates of each measuring station;

[0125] It should be noted that in the attached drawings provided in this embodiment, since the coordinates of the initial control side k1 - k2 are both known, the coordinates of measuring station 1 can be calculated according to the observed values of the side and angle;

[0126] Based on the same principle, based on the coordinates of measuring stations k2 and 1, calculate the coordinates of measuring station 2;

[0127] And so on, finally calculate the coordinates of the end control point k4.

[0128] The offset between the coordinates of k4 calculated from the initial control side k1 - k2 and the known actual coordinates of k4 is the first coordinate closing error of the end control point.

[0129] In another embodiment provided by the present invention, a device for positioning gross errors in a measuring wire is provided. Refer to Figure 8 , which is a schematic structural diagram of a device for positioning gross errors in a measuring wire provided by an embodiment of the present invention. The device includes:

[0130] A marking module, configured to mark the measuring station at one end of the measuring wire as the initial control point, and the measuring station at the other end as the end control point;

[0131] A first calculation module, configured to start from the initial control side, calculate the coordinates of each measuring station in the measuring wire according to the traverse wire calculation method, and further determine the first coordinate closing error of the end control point;

[0132] A second calculation module, configured to start from the end control point, calculate the coordinates of each measuring station according to the traverse wire calculation method, and further determine the second coordinate closing error of the initial control point;

[0133] A gross error module is configured to determine a gross error station where gross error occurs based on the ratio of the first coordinate closing error to the second coordinate closing error, the first distances between each measuring station on the measuring wire and the last control point, and the second distances between each measuring station and the starting control point.

[0134] It should be noted that the specific functions of each module are described in the embodiments of the above-mentioned measuring wire gross error positioning method, and will not be elaborated in this embodiment.

[0135] See Figure 9 , which is a schematic diagram of a terminal device provided by an embodiment of the present invention. The terminal device of this embodiment includes: a processor, a memory, and a computer program stored in the memory and executable on the processor, such as a measuring wire gross error positioning program. When the processor executes the computer program, the steps in the above-mentioned embodiments of each measuring wire gross error positioning method are implemented, such as Figure 1 the steps S1 to S4 shown. Alternatively, when the processor executes the computer program, the functions of each module / unit in the above-mentioned device embodiments are implemented.

[0136] Exemplarily, the computer program can be divided into one or more modules / units. The one or more modules / units are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program in the terminal device. For example, the computer program can be divided into a plot division module, a component generation module, a model generation module, a model adjustment module, a texture pasting module, and a road network generation module, and their specific functions will not be elaborated.

[0137] The terminal device can be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art can understand that the schematic diagram is only an example of the terminal device, and does not constitute a limitation on the terminal device. It may include more or fewer components than shown, or combine some components, or different components. For example, the terminal device may further include input / output devices, network access devices, a bus, etc.

[0138] The so-called processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The processor is the control center of the terminal device and connects various parts of the entire terminal device through various interfaces and circuits.

[0139] The memory can be used to store the computer programs and / or modules. The processor realizes various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory, and by calling the data stored in the memory. The memory may mainly include a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, phone book, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0140] Among them, if the modules / units integrated in the terminal device are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above-described embodiment methods of the present invention, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-described various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0141] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0142] The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A method for measuring and locating gross errors in a wire, characterized in that, Including: Mark the survey station at one end of the measurement wire as the starting control point, and the survey station at the other end as the ending control point; Starting from the starting control point, calculate the coordinates of each survey station in the measurement wire according to the traverse calculation method, and then determine the first coordinate closing error of the ending control point; Starting from the ending control point, calculate the coordinates of each survey station according to the traverse calculation method, and then determine the second coordinate closing error of the starting control point; Determine the gross error survey station with gross error according to the ratio of the first coordinate closing error to the second coordinate closing error, the first distance between each survey station on the measurement wire and the ending control point, and the second distance between each survey station and the starting control point.

2. The measurement wire gross error positioning method according to claim 1, wherein The step of determining the gross error survey station with gross error according to the ratio of the first coordinate closing error to the second coordinate closing error, the first distance between each survey station on the measurement wire and the ending control point, and the second distance between each survey station and the starting control point specifically includes: Calculate the closing ratio of the first coordinate closing error to the second coordinate closing error; Calculate the first distance between each survey station on the measurement wire and the ending control point, and the second distance between each survey station and the starting control point; Calculate the side ratio of the first distance to the second distance of each survey station on the measurement wire; Determine the gross error survey station with gross error according to the difference between the side ratio of each survey station in the measurement wire and the closing ratio.

3. The method for measuring and locating the gross error of a wire according to claim 2, wherein The step of calculating the first distance between each survey station on the measurement wire and the ending control point, and the second distance between each survey station and the starting control point specifically includes: According to the first coordinates of each survey station calculated starting from the starting control point and the second coordinates of the corresponding survey stations calculated starting from the ending control point, calculate the mean coordinates of each survey station correspondingly; Calculate the first distance between the mean coordinates of each survey station and the coordinates of the ending control point, and the second distance between the mean coordinates of each survey station and the coordinates of the starting control point.

4. The method for positioning the gross error of a measurement wire according to claim 2, wherein, The step of determining the gross error survey station with gross error according to the difference between the side ratio of each survey station in the measurement wire and the closing ratio specifically includes: Calculate the difference between the side ratio of each survey station in the measurement wire and the closing ratio; Determine the survey station with the smallest difference in the measurement wire as the gross error survey station.

5. The method for measuring and locating the gross error of a wire according to claim 2, characterized in that, The step of determining the gross error survey station with gross error according to the difference between the side ratio of each survey station in the measurement wire and the closing ratio specifically includes: According to the first coordinates of each survey station calculated starting from the starting control point and the second coordinates of the corresponding survey stations calculated starting from the ending control point, calculate the calculation deviation of each survey station correspondingly, and mark the survey station with the smallest calculation deviation as the preliminary determined survey station; Taking the preliminary determined survey station as the center, determine a continuous preset first number of survey stations on both sides of it as the survey stations to be verified; Calculate the difference between the side ratio of the preliminary determined survey station and each survey station to be verified and the closing ratio respectively; When the difference of the preliminary determined survey station is less than a preset first threshold, and the differences of the survey stations to be verified on both sides of it show an increasing distribution in the order of moving away from the preliminary determined survey station in turn, determine the preliminary determined survey station as the gross error survey station.

6. The method for measuring and locating the gross error of a wire according to claim 1, wherein, Determining the gross error station where the gross error occurs according to the ratio of the first coordinate closing error to the second coordinate closing error, the first distances between the stations on the measurement traverse and the last control point, and the second distances between the stations and the starting control point, specifically includes: Calculating the calculation deviation of each station according to the first coordinates of each station calculated starting from the starting control point and the second coordinates of the corresponding station calculated starting from the last control point, and marking the station with the smallest calculation deviation as the preliminary determined station; Calculating the closing ratio of the first coordinate closing error to the second coordinate closing error; Calculating the side ratio of the first distance to the second distance of the preliminary determined station, and calculating the preliminary difference between the side ratio of the preliminary determined station and the closing ratio; When the preliminary difference is less than a preset second threshold, determining the preliminary determined station as the gross error station.

7. The method for measuring and locating the gross error of a wire according to claim 1, characterized in that, Starting from the starting control point, calculating the coordinates of each station in the measurement traverse according to the branch traverse calculation method, and further determining the first coordinate closing error of the last control point, including: Starting from the starting control point, sequentially calculating the coordinates of each station according to the side lengths and angle observation values of each station until the coordinates of the last control point are calculated; Calculating the offset between the calculated coordinates of the last control point and its actual coordinates, which is the first coordinate closing error of the last control point.

8. A device for measuring and locating the gross error of a wire, characterized in that, The device includes: A marking module for marking the station at one end of the measurement traverse as the starting control point and the station at the other end as the last control point; A first calculation module for calculating the coordinates of each station in the measurement traverse according to the branch traverse calculation method starting from the starting control point, and further determining the first coordinate closing error of the last control point; A second calculation module for calculating the coordinates of each station according to the branch traverse calculation method starting from the last control point, and further determining the second coordinate closing error of the starting control point; A gross error module for determining the gross error station where the gross error occurs according to the ratio of the first coordinate closing error to the second coordinate closing error, the first distances between the stations on the measurement traverse and the last control point, and the second distances between the stations and the starting control point.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein when the computer program runs, it controls the device where the computer-readable storage medium is located to execute the measurement traverse gross error positioning method according to any one of claims 1 to 7.

10. A terminal device, characterized in that, Including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, it implements the measurement traverse gross error positioning method according to any one of claims 1 to 7.

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