CN-122015902-A - System for conducting wire precision estimation

CN122015902ACN 122015902 ACN122015902 ACN 122015902ACN-122015902-A

Abstract

The invention relates to the technical field of mapping engineering, in particular to a system for estimating the precision of a wire, which comprises a data acquisition module, a coordinate conversion module, a wire design module, a precision estimation module, a visual display module, a data interaction module and a data storage module. The data acquisition module acquires geographical space data of a region to be processed and parameters of a measuring instrument, the coordinate conversion module converts longitude and latitude coordinates into plane projection coordinates through Gaussian forward calculation, the wire design module constructs a side measuring net, a corner measuring net or a corner net, sets a side length threshold value, matches instrument parameters corresponding to a second-level control net, a fourth-level control net and the like, the precision estimation module calculates errors in the weakest point and errors in the weakest side relative center, decomposes and calculates plane through errors, the visualization module plots wire elements and error ellipses on an online map, the data interaction support CSV format is imported and exported, and the storage module stores data support operation in a unified array. The invention improves the estimation efficiency and precision, adapts to the multiplexing Cheng Changjing, and reduces the threshold of the application of the results.

Inventors

WU TONGYI
KONG FANBIN
CHEN YEQUAN
JI JINQIAO
HE ZHONGLIAN
YU PENG

Assignees

中建八局第四建设有限公司

Dates

Publication Date: 20260512
Application Date: 20251222

Claims (10)

1. The system for estimating the precision of the wire is characterized by comprising a data acquisition module, a coordinate conversion module, a wire design module, a precision estimation module, a visual display module and a data interaction module; The data acquisition module is used for acquiring geospatial data of the area to be processed and measuring instrument parameters; The coordinate conversion module is used for converting longitude and latitude coordinates in the geospatial data into plane projection coordinates through Gaussian forward calculation, and the Gaussian forward calculation formula is as follows: Wherein the method comprises the steps of From the equator to the latitude Is used for the meridian arc length of the model (a), For the radius of curvature of the circle of mortise, As the latitude of the person to be latituded, Longitude difference; The wire design module is used for constructing a plane wire net in the form of a side measuring net, an angle measuring net or a corner net based on the plane projection coordinates; The precision estimation module is used for calculating the error in the weakest point, the error in the weakest edge relative and the plane through error according to the type of the plane wire network and the parameters of the measuring instrument, wherein the error in the weakest point is calculated by adopting an error propagation law, and the formula is as follows: 、、 the main direction variance and covariance of the point location error ellipse, 、 The visual display module is used for drawing points, lines, angle elements and error ellipses of the plane wire network on the online map and distinguishing element attributes through different shapes or colors; the data interaction module is used for realizing the import and export of data.
2. The system for estimating the precision of a wire according to claim 1, wherein the parameters of the measuring instrument comprise an error in a measurement angle, a fixed error a and an error coefficient B, the wire design module is capable of matching the corresponding parameters of the measuring instrument according to a preset control network level, the control network level at least comprises a second level, a fourth level and the like, wherein the error in the measurement angle corresponding to the second level control network is 8, the fixed error a is 12, the error coefficient B is 12, the error in the measurement angle corresponding to the fourth level control network is 2.5, and the edge relative center error is 1/14000.
3. The system for estimating accuracy of wires according to claim 1, wherein the wire design module is configured to set a wire side length threshold when constructing a planar wire network, the side length threshold being not less than 50m, so as to avoid the influence of short sides on angle measurement errors and lateral through errors.
4. The system for estimating accuracy of a wire according to claim 1, wherein the planar through-errors calculated by the accuracy estimation module include a lateral through-error, a goniometric through-error, and a ranging through-error, wherein the lateral through-error calculation formula is: For the transverse penetration error caused by the angle measurement error, M Is a lateral through error caused by a ranging error.
5. The system for conducting wire precision estimation according to claim 1, wherein when the visual display module draws the error ellipse, the ellipse outline is fitted through a plurality of segments of lines by means of a line drawing function of an on-line map API, and an ellipse scale parameter is adjustable to control a display size of the error ellipse on the map.
6. The system for conducting wire precision estimation according to claim 1, wherein the data interaction module supports the imported data source format as CSV format, and the exported data includes process data and result data for precision estimation, and the result data includes a point number corresponding to the weakest point, an edge number corresponding to the weakest edge, and a middle error corresponding to the weakest edge and the weakest edge respectively.
7. The system for estimating precision of a wire according to claim 1, wherein the calculation formula of the radius of curvature N of the circle of mortise in the coordinate conversion module is: Wherein the method comprises the steps of Is a long half-axle of the earth, Is the first eccentricity of the earth.
8. The system for estimating accuracy of a wire according to claim 1, wherein the accuracy estimation module calculates the weakest edge relative median error using the formula: Wherein the method comprises the steps of As a side-length variance factor, Is the error in the weight of the unit, Is the side length of the weakest side.
9. The system for estimating the precision of the wire according to claim 1, wherein the specific way of distinguishing the element attributes by the visual display module is that known points are marked by circles, measuring stations are marked by squares, known sides are marked by red lines, and sides to be measured are marked by blue lines.
10. The system for conducting wire precision estimation according to claim 1, further comprising a data storage module, wherein the data storage module adopts a unified array to store point number, point coordinates, edge number, edge length and angle data of the planar conducting wire network, and performs matrix operation based on the unified array to realize calculation of error parameters in the precision estimation module.

Description

System for conducting wire precision estimation Technical Field The invention relates to the technical field of surveying and mapping engineering, in particular to a system for estimating the precision of a wire. Background In the field of surveying and mapping engineering, wire measurement is a core technical means for determining ground control point coordinates and realizing engineering accurate positioning, and is widely applied to scenes such as urban road construction, industrial park planning, mountain area transmission line surveying, hydraulic engineering construction and the like. Along with the continuous improvement of the requirements of various projects on space positioning precision, for example, millimeter-level positioning precision is required for urban underground pipe gallery construction, centimeter-level deviation is required to be controlled for high-voltage transmission tower position lofting, wire precision estimation is used as a key link for predicting fruit forming reliability and avoiding engineering reworking risks, and the efficiency and the accuracy of the wire precision estimation are more important. However, there are still many limitations on the technical means in the current wire precision estimation field, and it is difficult to meet the requirements of modern engineering on efficient, precise and flexible mapping, and the specific problems are as follows: 1. the automation degree of data processing is low, the efficiency is low and the error is easy to occur The traditional lead precision estimation needs to rely on manual work to finish multi-loop data processing, and has the disadvantages of complicated flow and low fault tolerance. On one hand, coordinate conversion of geospatial data, such as converting longitude and latitude coordinates into Gaussian plane projection coordinates, is carried out by manually applying Gaussian forward calculation formulas to calculate step by step, and relates to derivation of complex parameters such as meridian arc length X, mortise circle curvature radius N and the like, which not only takes 10-20 minutes, but also is easy to cause coordinate deviation due to manual calculation errors such as arc and angle conversion errors and formula coefficient omission, on the other hand, measuring instrument parameters such as errors in angle measurement and fixed errors A need to be manually input into a calculation system, and if operators confuse parameter standards corresponding to a secondary control network, a fourth control network and the like, for example, errors 8' in the angle measurement of the secondary control network are input into the fourth control network and the like by mistake, the subsequent accuracy estimation result is directly distorted, repeated verification and correction are needed, and the working efficiency is further reduced. 2. The design flexibility of the lead is insufficient and the adaptation scene is limited The traditional wire design relies on empirical operation, and the type and parameters of the wire net are difficult to flexibly adjust according to engineering scenes. Firstly, the control network is single in form, most traditional tools only support one of the angle measurement network or the edge measurement network, the angle measurement network or the edge measurement network cannot be flexibly selected according to the topography conditions, for example, the angle measurement in a mountain area is easily shielded by vegetation and is more suitable for the edge measurement network, the field of view of an industrial park is wide and suitable for the edge measurement network, the measurement scheme is not matched with an actual scene, additional errors are added, secondly, the edge length control of a wire lacks system constraint, the edge length threshold value in the traditional design depends on manual experience setting, if only an engineer subjectively judges that the edge length is not too short, a standardized threshold value management mechanism is not formed, the condition that a short side is incorporated into the wire network is easy to occur, for example, the short side is smaller than 50m, the influence of the angle measurement error on the transverse through error is obviously amplified, for example, the transverse deviation brought by the angle measurement error 10' of the short side is 2-3 times of the long side, and finally the whole precision is not up to the standard. 3. The accuracy estimation logic is complex, and the accuracy of the result is difficult to ensure The estimation of the wire precision relates to the professional theory of error propagation law, variance covariance matrix operation and the like, and the traditional manual calculation or simple tool calculation has obvious defects. On one hand, error calculation in the weakest point needs to synchronously process the main direction variance and covariance of point error ellipse and errors in x/y directions, such as