CPIII measurement method
By using a total station and GPS positioning device to observe the intersection of the longitudinal and transverse centerlines of the CPIII control points, data is acquired and calibrated, which solves the problems of low measurement efficiency and low accuracy in the existing technology of CPIII, and realizes more efficient railway track operation monitoring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENZHEN TONGHAO RAILWAY TECH CO LTD
- Filing Date
- 2022-03-26
- Publication Date
- 2026-05-29
Smart Images
Figure CN116858181B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of CPIII measurement technology, and in particular to CPIII measurement methods. Background Technology
[0002] The high-speed railway track control network (CPIII) primarily provides control references for track laying and operation and maintenance. Control points are arranged in pairs every 40-60 meters along the track direction, with each pair of control points spaced approximately 15 meters apart.
[0003] CPIII control measurement is carried out on the basis of the coordinate results of CPII of the line control network. The plane and elevation coordinates of each control point of CPIII are obtained by measurement, so as to realize the monitoring of track operation and maintenance. Among them, the most common operation methods are as follows: (1) Polar coordinate method; each CPIII point is calculated independently, so the correlation of CPIII is not strong; (2) Angle intersection method; the measurement accuracy is not high; (3) Side intersection method; it requires corrections such as atmospheric refraction and instrument multiplication constant, which is relatively cumbersome; (4) Offset intersection method; this method is relatively simple to operate and has high accuracy, but because the offset is not completely perpendicular to the directional line of sight, the correlation of each CPIII is not strong.
[0004] The above methods are all station-by-station intermittent measurement methods based on static measuring instruments such as total stations, theodolites, and levels. They are time-consuming, extremely inefficient, and have high requirements for the observation conditions (such as atmosphere and light) during measurement. In addition, the correlation between CPIII control points is not strong, so the accuracy of the CPIII pile control network cannot be guaranteed.
[0005] Therefore, a CPIII measurement method is proposed, which improves the accuracy of the CPIII pile control network and ensures the stable operation of railway tracks by setting up a scheme that can simultaneously measure and remeasure CPIII control points. Summary of the Invention
[0006] The purpose of this invention is to provide a CPIII measurement method that solves the problem that the accuracy of CPIII measurement in railway track operation needs to be improved in the prior art.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] The CPIII measurement method uses a measurement system consisting of a total station, an industrial computer, a GPS positioning device, and a power supply device. The observation point is the intersection of the longitudinal centerline of the two control points on both sides and the transverse centerline of the two adjacent control points on the same side. With the total station adjusted vertically, distance and angle data are acquired. With the total station adjusted horizontally, distance data of at least three control points are acquired. The industrial computer classifies, calculates, and verifies multiple sets of data to obtain the difference between the ideal data and the actual data, so as to control the CPIII network parameters.
[0009] The steps are as follows:
[0010] Step S1: Select at least three pairs of non-adjacent control points, connect each pair of control points laterally, find the midpoint of the three laterally connected lines, obtain the longitudinal centerline, then select at least two pairs of control points to connect laterally, and check the longitudinal bus position.
[0011] Step S2: Connect two adjacent control points on the same side, take the perpendicular line from the midpoint, extend the perpendicular line and make it perpendicular to the longitudinal centerline to form a transverse centerline, and obtain the intersection point of the longitudinal centerline and multiple transverse centerlines as the observation point;
[0012] Step S3: Set up the total station's linear moving track along the longitudinal centerline, calibrate the moving track using a ray, set up the total station on the moving track, and perform observations at each observation point;
[0013] Step S4: Set two more observation points in the vertical direction at each observation point, and the two observation points are located on a plane away from the control point. Obtain the distance data of the four symmetrical control points at the two observation points respectively.
[0014] Step S5: Obtain the height data after each vertical adjustment of the total station;
[0015] Step S6: Select two additional control points that are symmetrical to the observation point and are furthest from it. Obtain distance data from the two vertical observation points respectively.
[0016] Step S7: At the same observation point, obtain the angle data from steps S4, S5, and S6;
[0017] Step S8: Move the total station to complete all observation points, generate a table using an industrial computer, and verify and calibrate the table data against the ideal data.
[0018] Preferably, in step S8, the difference between the height difference adjusted by the total station at each observation point and the calculated vertical distance from the control point to the total station is accurate to the millimeter.
[0019] Preferably, in step S8, the height difference between three pairs of control points at each observation point is calibrated, and the height difference between multiple sets of control points at multiple observation points is calibrated to the millimeter.
[0020] Preferably, before measuring the distance at each observation point, the angle values from the observation point to three pairs of control points are first measured, and the positioning of the observation point at the intersection is calibrated to the millimeter using an industrial computer.
[0021] Preferably, after the distance data at each observation point is acquired, and based on the accurate calibration of the angle data, the actual vertical distance from the control point to the total station can be obtained.
[0022] The present invention has the following beneficial effects:
[0023] 1. By setting up angle data acquisition operations at each observation point, the position of the observation point can be calibrated in advance using angle operations, thereby making the observed data more accurate. This realizes a CPIII measurement method with self-checking function and more accurate data.
[0024] 2. Obtain distance data from at least three control points at each observation point, and so on, to establish connections between multiple control points. By using the known intersection points on the centerline as observation points, less data can be measured, and the comparison between ideal and actual data can be better realized. By comparing the data, the specific situation of each control point can be more intuitively obtained, making CPIII measurement operation simple and calculation more convenient. Attached Figure Description
[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 The first observation point in the vertical direction for each observation point;
[0027] Figure 2 The second observation point in the vertical direction for each observation point;
[0028] Figure 3 A schematic diagram of the angle observation for each observation point. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0030] Example 1
[0031] Reference Figure 1-3 The CPIII measurement method uses a measurement system consisting of a total station, an industrial computer, a GPS positioning device, and a power supply device. The observation point is the intersection of the longitudinal centerline of the two control points on both sides and the transverse centerline of the two adjacent control points on the same side. With the total station adjusted vertically, distance and angle data are acquired. With the total station adjusted horizontally, distance data of at least three control points are acquired. The industrial computer classifies, calculates, and verifies multiple sets of data to obtain the difference between the ideal data and the actual data, so as to control the CPIII network parameters.
[0032] In this embodiment: at least three control point distance data are obtained through each observation point, and so on, so as to establish a connection between multiple control points. By using the known intersection point on the centerline as the observation point, less data can be measured, and the comparison between ideal data and actual data can be better realized. By comparing the data, the specific situation of each control point can be more intuitively obtained, making the CPIII measurement operation simple and the calculation more convenient.
[0033] Example 2
[0034] Reference Figure 1-3 The CPIII measurement method and steps are as follows:
[0035] Step S1: Select at least three pairs of non-adjacent control points, connect each pair of control points laterally, find the midpoint of the three laterally connected lines, obtain the longitudinal centerline, then select at least two pairs of control points to connect laterally, and check the longitudinal bus position.
[0036] Step S2: Connect two adjacent control points on the same side, take the perpendicular line from the midpoint, extend the perpendicular line and make it perpendicular to the longitudinal centerline to form a transverse centerline, and obtain the intersection point of the longitudinal centerline and multiple transverse centerlines as the observation point;
[0037] Step S3: Set up the total station's linear moving track along the longitudinal centerline, calibrate the moving track using a ray, set up the total station on the moving track, and perform observations at each observation point;
[0038] Step S4: Set two more observation points in the vertical direction at each observation point, and the two observation points are located on a plane away from the control point. Obtain the distance data of the four symmetrical control points at the two observation points respectively.
[0039] Step S5: Obtain the height data after each vertical adjustment of the total station;
[0040] Step S6: Select two additional control points that are symmetrical to the observation point and are furthest from it. Obtain distance data from the two vertical observation points respectively.
[0041] Step S7: At the same observation point, obtain the angle data from steps S4, S5, and S6;
[0042] Step S8: Move the total station to complete all observation points, generate a table using an industrial computer, and verify and calibrate the table data against the ideal data; calibrate the difference between the vertical adjustment of the total station at each observation point and the calculated vertical distance from the control point to the total station, accurate to millimeters; calibrate the height difference between the three pairs of control points at each observation point, and calibrate the height difference between multiple sets of control points at multiple observation points, accurate to millimeters.
[0043] In this embodiment, by adding two observation points vertically to each observation point, and by comparing the calculated height difference of the control point with the height difference of multiple observation points, the comparative positioning of multiple control points on the horizontal network can be achieved, which can more intuitively and accurately obtain the measurement information of the control points.
[0044] Example 3
[0045] Reference Figure 1-3 The CPIII measurement method and steps are as follows:
[0046] Step S1: Select at least three pairs of non-adjacent control points, connect each pair of control points laterally, find the midpoint of the three laterally connected lines, obtain the longitudinal centerline, then select at least two pairs of control points to connect laterally, and check the longitudinal bus position.
[0047] Step S2: Connect two adjacent control points on the same side, take the perpendicular line from the midpoint, extend the perpendicular line and make it perpendicular to the longitudinal centerline to form a transverse centerline, and obtain the intersection point of the longitudinal centerline and multiple transverse centerlines as the observation point;
[0048] Step S3: Set up the total station's linear moving track along the longitudinal centerline, calibrate the moving track using a ray, set up the total station on the moving track, and perform observations at each observation point;
[0049] Step S4: Set two more observation points in the vertical direction at each observation point, and the two observation points are located on a plane away from the control point. Obtain the distance data of the four symmetrical control points at the two observation points respectively.
[0050] Step S5: Obtain the height data after each vertical adjustment of the total station;
[0051] Step S6: Select two additional control points that are symmetrical to the observation point and are furthest from it. Obtain distance data from the two vertical observation points respectively.
[0052] Step S7: At the same observation point, acquire the angle data from steps S4, S5, and S6; before measuring the distance at each observation point, first measure the angle values from the observation point to three pairs of control points, and use an industrial computer to calibrate the positioning of the observation point at the intersection point, accurate to millimeters; after acquiring the distance data at each observation point, based on the accurate calibration of the angle data, the actual vertical distance from the control point to the total station can be obtained;
[0053] Step S8: Move the total station to complete all observation points, generate a table using an industrial computer, and verify and calibrate the table data against the ideal data; calibrate the difference between the vertical adjustment of the total station at each observation point and the calculated vertical distance from the control point to the total station, accurate to millimeters; calibrate the height difference between the three pairs of control points at each observation point, and calibrate the height difference between multiple sets of control points at multiple observation points, accurate to millimeters.
[0054] In this embodiment, by setting the angle data acquisition operation at each observation point, the position of the observation point can be calibrated in advance using the angle operation, thereby making the observed data more accurate. This realizes a CPIII measurement method with self-checking function and more accurate data.
[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.
Claims
1. The CPIII measurement method, using a measurement system consisting of a total station, an industrial computer, a GPS positioning device, and a power supply device, is characterized by: The observation point is the intersection of the longitudinal centerline of the control points on both sides and the transverse centerline of the two adjacent control points on the same side. With the total station height adjusted up and down, distance and angle data are obtained. With the total station adjusted horizontally, distance data of at least three control points are obtained. The industrial computer classifies, calculates and verifies multiple sets of data to obtain the difference between ideal data and actual data in order to control the CPIII network parameters. The steps are as follows: Step S1: Select at least three pairs of non-adjacent control points, connect each pair of control points laterally, find the midpoint of the three laterally connected lines, obtain the longitudinal centerline, and then select at least two pairs of control points to connect laterally and check the longitudinal bus position. Step S2: Connect two adjacent control points on the same side, take the perpendicular line from the midpoint, extend the perpendicular line and make it perpendicular to the longitudinal centerline to form a transverse centerline, and obtain the intersection point of the longitudinal centerline and multiple transverse centerlines as the observation point; Step S3: Set up the total station's linear moving track along the longitudinal centerline, calibrate the moving track using a ray, set up the total station on the moving track, and perform observations at each observation point; Step S4: Set two more observation points in the vertical direction at each observation point, and the two observation points are located on a plane away from the control point. Obtain the distance data of the four symmetrical control points at the two observation points respectively. Step S5: Obtain the height data after each vertical adjustment of the total station; Step S6: Select two additional control points that are symmetrical to the observation point and are furthest from it. Obtain distance data from the two vertical observation points respectively. Step S7: At the same observation point, obtain the angle data from steps S4, S5, and S6; Step S8: Move the total station to complete all observation points, generate a table using an industrial computer, and verify and calibrate the table data against the ideal data.
2. The CPIII measurement method according to claim 1, characterized in that, In step S8, the difference between the height difference of the total station at each observation point and the calculated vertical distance from the control point to the total station is calibrated to the millimeter.
3. The CPIII measurement method according to claim 1, characterized in that, In step S8, the height difference of three pairs of control points for each observation point is calibrated, and the height difference of multiple sets of control points for multiple observation points is calibrated to the millimeter.
4. The CPIII measurement method according to claim 1, characterized in that, Before measuring the distance at each observation point, the angle values from the observation point to three pairs of control points are first measured. The positioning of the observation point at the intersection is then calibrated using an industrial computer, with an accuracy of millimeters.
5. The CPIII measurement method according to claim 1, characterized in that, After acquiring the distance data at each observation point, and based on accurate angle data calibration, the actual vertical distance from the control point to the total station can be obtained.