A method for testing the accuracy of a total station

Abstract

This invention provides a method for testing the accuracy of a total station, comprising: S1, setting up the total station to be tested at a first preset station; obtaining the first coordinates of each measurement point using the total station at the first preset station; S2, selecting two reference points and setting up transfer targets M1 and M2 respectively, obtaining the first coordinates of each transfer target using the total station at the first preset station; S3, moving the total station to a second preset station, and after selecting 2-point movement in the 3D measurement software, obtaining the second coordinates of each transfer target; if the station movement error does not exceed the required value, proceeding to the next step; S4, obtaining the second coordinates of each measurement point using the total station at the second preset station; comparing the second coordinates of each measurement point with the first coordinates of the corresponding measurement point; if the deviation value exceeds the preset value, the accuracy of the total station is unqualified; if the deviation value does not exceed the preset value, the accuracy of the total station is qualified; the testing process is simple and convenient, with a short cycle, and is easy to promote.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, specifically relating to a method for testing whether the accuracy of a total station is up to standard. Background Technology

[0002] In recent years, the shipbuilding industry has introduced process precision control models and total station three-dimensional measurement methods. Three-dimensional measurement plays an important role in the precision control process of shipbuilding.

[0003] Total stations are prone to measurement inaccuracies due to impacts and inherent instrument problems. If a total station with substandard measurement accuracy is used directly for shipbuilding accuracy control, the measured data will deviate significantly from the design theoretical data. This could lead to misjudgments by accuracy managers regarding on-site structural accuracy deviations, resulting in incorrect adjustments. To ensure the accuracy of total stations used in shipbuilding and guarantee overall shipbuilding precision, it is necessary to periodically commission third-party testing agencies to conduct metrological inspections of the total stations. However, each metrological inspection cycle is lengthy, which is detrimental to the smooth progress of shipbuilding. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a method for testing whether the accuracy of a total station is qualified. This method uses three-dimensional measurement software to analyze the deviation of measurement data before and after the total station is moved, and determines whether the accuracy of the total station meets the requirements. The entire testing process is simple and convenient, with a short testing cycle, effectively improving the construction cycle and construction accuracy of shipbuilding.

[0005] To achieve the above and other related objectives, the present invention provides a method for detecting whether the accuracy of a total station is qualified, the method comprising:

[0006] S1. Set up the total station to be tested at the first preset station of the testing site and connect the total station to the three-dimensional measurement software; then, arrange measurement points P1, P2, P3 and P4 in the front, back, left and right directions of the total station respectively; measure the coordinates of each measurement point using the total station at the first preset station to obtain the first coordinates of each measurement point.

[0007] S2. Select two reference points to set up the transfer target M1 and transfer target M2 respectively, and use the total station at the first preset station to measure the coordinates of transfer target M1 and transfer target M2 in sequence to obtain the first coordinates of each transfer target.

[0008] S3. Move the total station to the second preset station on the testing site, and select 2-point movement in the 3D measurement software connected to the total station. Measure the coordinates of the transfer target M1 and transfer target M2 respectively, and obtain the second coordinates of each transfer target. Calculate the total station's relocation error using the first and second coordinates of each transfer target. If the relocation error exceeds the required value, adjust the crosshairs of the total station's measurement cursor and remeasure the coordinates of transfer target M1 and transfer target M2 until the relocation error does not exceed the required value. If the relocation error does not exceed the required value, proceed to the next step.

[0009] S4. Measure the coordinates of each measurement point using a total station at the second preset station to obtain the second coordinates of each measurement point; compare the second coordinates of each measurement point with the first coordinates of the corresponding measurement point. If the deviation exceeds the preset value, the accuracy of the total station is unqualified; if the deviation does not exceed the preset value, the accuracy of the total station is qualified.

[0010] Before ship construction, this invention uses on-site 3D measurement software to analyze the deviation of coordinates measured before and after the total station is moved, in order to determine whether the accuracy of the total station meets the requirements. This ensures that the accuracy of the total station used in ship construction is qualified, reduces misjudgment and incorrect correction due to the accuracy of the total station, and guarantees the accuracy of ship construction. In addition, the entire total station accuracy testing process is simple, easy to operate, and has a short testing cycle, effectively improving the ship construction cycle.

[0011] Preferably, the minimum distance between measurement point P1 and measurement point P2 should be no less than 30m; the minimum distance between measurement point P3 and measurement point P4 should be no less than 30m, in order to ensure the measurement distance of the total station.

[0012] Preferably, there are two measurement points P1, P2, P3, and P4. The two measurement points P1 are located at different heights, and the angle between the total station and the line connecting the two measurement points P1 is not less than 45°. Similarly, the two measurement points P2 are located at different heights, and the angle between the total station and the line connecting the two measurement points P2 is not less than 45°. The two measurement points P3 are located at different heights, and the angle between the total station and the line connecting the two measurement points P3 is not less than 45°. The two measurement points P4 are located at different heights, and the angle between the total station and the line connecting the two measurement points P4 is not less than 45°, to simulate vertical angle measurement using a total station.

[0013] Preferably, the angle between the total station and the line connecting the two reference points is 30° to 150° to ensure the accuracy of station relocation.

[0014] Preferably, the total station is at least 5m away from each measurement point.

[0015] Preferably, the three-dimensional measurement software is EcoMES, a three-dimensional accuracy data measurement software, or DACS-PDA, a segmented measurement and on-site analysis software, which the user can choose according to their needs.

[0016] Preferably, the required value is no greater than 0.2 mm.

[0017] Preferably, the preset value is no greater than 1 mm.

[0018] As described above, the method for detecting whether the accuracy of a total station is qualified according to the present invention has the following beneficial effects:

[0019] The 3D measurement software of this invention simulates the actual 3D measurement scenario and the state of the total station at different measurement angles in the field. It obtains the coordinate deviation values ​​of measurement points in different directions, angles and distances before and after the total station is moved, thereby confirming whether the 3D measurement accuracy of the total station is qualified. This reduces the work of misjudging and incorrectly correcting deviations caused by the accuracy of the total station, and ensures the accuracy of ship construction. In addition, the entire total station accuracy detection process is simple, easy to operate and has a short detection cycle, which effectively improves the construction cycle of ship construction and facilitates its widespread use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the total station of the present invention detecting various measurement points.

[0021] Figure 2 for Figure 1 Top view.

[0022] Figure 3 This is a flowchart illustrating the method for detecting whether the accuracy of a total station is up to standard according to the present invention.

[0023] Explanation of reference numerals in the attached figures

[0024] Wall 01, measuring points P1~P4, target station M1~M2, total station 01. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0026] Please see Figures 1 to 3It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0027] like Figure 3 As shown, the present invention provides a method for detecting whether the accuracy of a total station is qualified, the method comprising:

[0028] S1, such as Figure 1 As shown, the total station 1 to be tested is set up at the first preset station of the testing site, and the total station 1 is connected to the three-dimensional measurement software and leveled. Then, measurement points P1, P2, P3 and P4 are arranged on the wall 01 in the four directions of front, back, left and right of the total station 1, respectively. The coordinates of each measurement point are measured by the total station 1 at the first preset station to obtain the first coordinates of each measurement point and establish the first coordinate system.

[0029] It is understood that the number of measurement points in each direction is at least one, and there is no limitation on this; in this embodiment, it is preferred to set the number of measurement points in each direction to two (that is, two measurement points P1, P2, P3 and P4 each).

[0030] Specifically, when one measurement point each is set for P1, P2, P3, and P4, to verify the measurement accuracy of the vertical angle of the total station 1, the heights of measurement points P1, P2, P3, and P4 are all different, and the angle between the total station 1 at the first preset station and the line connecting any two measurement points is not less than 45°; when two measurement points each are set for P1, P2, P3, and P4, the two measurement points P1 are located at different heights, and the angle between the total station 1 at the first preset station and the line connecting these two measurement points P1 is not less than 45°; the two measurement points P2 are located at different heights, and the angle between the total station 1 at the first preset station and the line connecting these two measurement points P2 is not less than 45°; the two measurement points P3 are located at different heights, and the angle between the total station 1 at the first preset station and the line connecting these two measurement points P3 is not less than 45°; the two measurement points P4 are located at different heights. Furthermore, the angle between the total station 1 at the first preset station and the line connecting the two measurement points P4 is not less than 45°, so as to simulate the angle rotation measurement in the vertical direction, which is convenient for testing the measurement accuracy of the vertical angle of the total station 1.

[0031] To verify the distance measurement accuracy of total station 1, the minimum distance between measurement point P1 and measurement point P2 must be no less than 30m; the minimum distance between measurement point P3 and measurement point P4 must be no less than 30m.

[0032] It is understandable that the vertical distance from the total station 1 at the first preset station to the walls 1 in each direction should not exceed 5m.

[0033] Understandably, the measurement points in the four directions of front, back, left, and right allow the total station 1 to simulate horizontal angle rotation measurement, which facilitates the testing of the measurement accuracy of the total station's horizontal angle.

[0034] It is understood that the three-dimensional measurement software in this invention is either EcoMES, a three-dimensional accuracy data measurement software, or DACS-PDA, a segmented measurement and on-site analysis software, and there is no limitation on the latter.

[0035] S2. Select two reference points to set up transfer targets M1 and M2 respectively, and use a total station at the first preset station to measure the coordinates of transfer targets M1 and M2 in sequence to obtain the first coordinates of each transfer target; the first coordinates of each transfer target are located in the first coordinate system.

[0036] It is understandable that the selection of benchmark points should meet the following condition: the angle between the total station 1 at the first preset station and the line connecting the two benchmark points is 30° to 150°.

[0037] S3, such as Figure 2As shown, the total station 1 is moved to the second preset station on the testing site. After selecting two-point movement in the three-dimensional measurement software connected to the total station 1, the coordinates of the transfer target M1 and the transfer target M2 are measured respectively, and the second coordinates of each transfer target are obtained. The stationing error of the total station is obtained through the first and second coordinates of each transfer target. If the stationing error does not meet the requirements, the crosshairs of the measuring cursor of the total station are adjusted and the coordinates of the transfer target M1 and the transfer target M2 are measured again until the stationing error meets the requirements. If the stationing error meets the requirements, the next step is performed. At this time, the coordinates measured by the total station 1 are incorporated into the first coordinate system.

[0038] It is understandable that the total station's shifting error is the deviation of the X, Y, and Z coordinates of each target measured before and after the total station's shift.

[0039] It is understandable that the selection of the second preset station should simultaneously meet the following conditions:

[0040] (1) The angle between the total station 1 at the second preset station and the line connecting the two reference points is 30° to 150°;

[0041] (2) The vertical distance from the total station 1 at the second preset station to the wall 1 in each direction must be no less than 5m;

[0042] (3) When there is one measurement point P1, P2, P3 and P4, the angle between the total station 1 at the second preset station and the line connecting any two measurement points shall not be less than 45°; when there are two measurement points P1, P2, P3 and P4, the angle between the total station 1 at the second preset station and the line connecting the two measurement points P1 shall not be less than 45°; the angle between the total station 1 at the second preset station and the line connecting the two measurement points P2 shall not be less than 45°; the angle between the total station 1 at the second preset station and the line connecting the two measurement points P3 shall not be less than 45°; the angle between the total station 1 at the second preset station and the line connecting the two measurement points P4 shall not be less than 45°.

[0043] It is understood that the required value should not be greater than 0.2 mm, and in this embodiment, the required value is preferably set to not greater than 0.1 mm.

[0044] S4. Measure the coordinates of each measurement point using the total station 1 at the second preset station to obtain the second coordinates of each measurement point; compare the second coordinates of each measurement point with the first coordinates of the corresponding measurement point. If the deviation exceeds the preset value, the accuracy of the total station is unqualified; if the deviation does not exceed the preset value, the accuracy of the total station is qualified.

[0045] Understandably, the deviation value is the deviation of each measurement point in the X, Y, and Z coordinates before and after the total station 1 is moved.

[0046] Understandably, in order to ensure the accuracy of the total station, the preset value is no greater than 1mm.

[0047] In summary, this invention utilizes 3D measurement software to incorporate the coordinates measured by the total station before and after station relocation into the same coordinate system. The accuracy of the total station's measurement is determined by the coordinate deviation of the same measurement point before and after station relocation. The entire determination process is convenient and quick, with a short evaluation cycle, effectively improving shipbuilding efficiency and facilitating widespread application.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for testing whether the accuracy of a total station is qualified, characterized in that, The method includes: S1. Set up the total station to be tested at the first preset station of the testing site and connect the total station to the three-dimensional measurement software; then, arrange measurement points P1, P2, P3 and P4 in the front, back, left and right directions of the total station respectively; measure the coordinates of each measurement point using the total station at the first preset station to obtain the first coordinates of each measurement point. S2. Select two reference points to set up the transfer target M1 and transfer target M2 respectively, and use the total station at the first preset station to measure the coordinates of transfer target M1 and transfer target M2 in sequence to obtain the first coordinates of each transfer target. S3. Move the total station to the second preset station on the testing site, and select 2-point movement in the 3D measurement software connected to the total station. Measure the coordinates of the transfer target M1 and transfer target M2 respectively, and obtain the second coordinates of each transfer target. Calculate the total station's relocation error using the first and second coordinates of each transfer target. If the relocation error exceeds the required value, adjust the crosshairs of the total station's measurement cursor and remeasure the coordinates of transfer target M1 and transfer target M2 until the relocation error does not exceed the required value. If the relocation error does not exceed the required value, proceed to the next step. S4. Measure the coordinates of each measurement point using a total station at the second preset station to obtain the second coordinates of each measurement point; compare the second coordinates of each measurement point with the first coordinates of the corresponding measurement point. If the deviation exceeds the preset value, the accuracy of the total station is unqualified; if the deviation does not exceed the preset value, the accuracy of the total station is qualified.

2. The method for detecting whether the accuracy of a total station is qualified according to claim 1, characterized in that, The minimum distance between measurement point P1 and measurement point P2 must be no less than 30m; the minimum distance between measurement point P3 and measurement point P4 must be no less than 30m.

3. A method for detecting whether the accuracy of a total station is qualified according to claim 1 or 2, characterized in that, The measurement points P1, P2, P3, and P4 are each set in pairs; the two measurement points P1 are located at different heights, and the angle between the total station and the line connecting the two measurement points P1 is not less than 45°; the two measurement points P2 are located at different heights, and the angle between the total station and the line connecting the two measurement points P2 is not less than 45°; the two measurement points P3 are located at different heights, and the angle between the total station and the line connecting the two measurement points P3 is not less than 45°; the two measurement points P4 are located at different heights, and the angle between the total station and the line connecting the two measurement points P4 is not less than 45°.

4. The method for detecting whether the accuracy of a total station is qualified according to claim 1, characterized in that, The angle between the total station and the line connecting the two reference points is 30° to 150°.

5. The method for detecting whether the accuracy of a total station is qualified according to claim 1, characterized in that, The total station should be at least 5 meters away from each measurement point.

6. The method for detecting whether the accuracy of a total station is qualified according to claim 1, characterized in that, The three-dimensional measurement software is either EcoMES, a three-dimensional accuracy data measurement software, or DACS-PDA, a segmented measurement and on-site analysis software.

7. The method for detecting whether the accuracy of a total station is qualified according to claim 1, characterized in that, The required value is no greater than 0.2 mm.

8. The method for detecting whether the accuracy of a total station is qualified according to claim 1, characterized in that, The preset value is no greater than 1 mm.

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