A method for measuring the rotation angle of pipeline joints based on total station

Abstract

The present invention relates to the technical field of pipeline measurement, and provides a method for measuring the rotation angle of a pipeline joint based on a total station. The method comprises determining the number and location of measuring stations according to the center line of a water diversion project; setting up a total station upstream of the first pipeline joint of the ith measuring station; setting up a prism at the jth joint of the ith measuring station in order from upstream to downstream, and reading the total station data to obtain the horizontal sight distance S of the jth joint in the ith measuring station. ij and elevation H ij ; Calculate the inclination of each section of the pipeline according to the horizontal sight distance and elevation of each joint; Calculate the turning angle of each joint according to the inclination of each section of the pipeline. This method does not require frequent station transfer, is not affected by environmental cleanliness, and has high operating efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline measurement, and in particular to a pipeline joint angle measurement method based on a total station. Background Art

[0002] During the construction and operation of large-scale water diversion projects, monitoring and measuring the angles of large-diameter pipe joints can effectively ensure the stability and safety of the pipeline structure. Currently, there are two main measurement methods: precision inclinometers and levels.

[0003] Method 1: Use a precision inclinometer to first measure the inclination of each pipe, and then calculate the joint angle based on the difference in the inclination of the two pipes at the joint. This method has high requirements for the clean environment at the pipe joint. During operation, silt or water is easily accumulated at the pipe joint, which will seriously affect the measurement accuracy.

[0004] Method 2: Use a level to measure the height difference and horizontal distance, and calculate the pipeline inclination and joint rotation angle. Due to the limited measurement range of the level, frequent station transfers and the cooperation of at least three people are required, resulting in low operating efficiency and high labor costs.

[0005] Therefore, a method for measuring the pipe joint angle that does not require frequent station changes and is not affected by environmental cleanliness is needed. Summary of the invention

[0006] In view of this, an embodiment of the present application provides a method for measuring the angle of a pipe joint based on a total station, which does not require frequent station changes, is not affected by environmental cleanliness, and has high operating efficiency.

[0007] The embodiment of the present application provides a method for measuring the angle of a pipe joint based on a total station, comprising:

[0008] Determine the number and location of measuring stations based on the centerline of the water diversion project;

[0009] Set up a total station upstream of the first pipeline joint of the i-th measuring station;

[0010] In order from upstream to downstream, a prism is set up at the jth joint of the i-th measuring station, and the total station data is read to obtain the horizontal sight distance S of the jth joint in the i-th measuring station. ij and elevation H ij ;

[0011] Calculate the inclination of each pipe section based on the horizontal sight distance and elevation of each joint;

[0012] Calculate the rotation angle of each joint according to the inclination angle of each pipe section;

[0013] Wherein, i=1,2,…,m, m is the number of measuring stations; j=1,2,…,n, n is the number of joints in the i-th measuring station.

[0014] Preferably, the determining the number and location of measuring stations according to the center line of the water diversion project includes:

[0015] Obtain the pipeline laying path based on the center line of the water diversion project;

[0016] Based on the pipeline laying path, in the line section without corners, the measurement range of each measuring station of the line section without corners is divided under the condition that the horizontal sight distance S of each joint is not greater than a preset distance, so as to determine the position of each measuring station of the line section without corners;

[0017] Adding measuring stations at line corners;

[0018] The number of measuring stations is the sum of the number of measuring stations set at the non-corner line section and the number of measuring stations set at the line corners.

[0019] Preferably, after setting up the total station upstream of the first pipe joint of the i-th measuring station, the method further includes configuring parameters of the total station.

[0020] Preferably, parameter configuration of the total station includes inputting the plane coordinates and elevation of the measuring station corresponding to the total station, and inputting the measuring height and orientation angle of the total station.

[0021] Preferably, the step of setting up a prism at the j-th joint of the i-th measuring station comprises:

[0022] Setting up a prism at the first joint of the i-th measuring station, and adjusting the bracket height of the prism to be consistent with the instrument height of the corresponding total station;

[0023] A prism is set up at the jth joint of the i-th measuring station, and the support height of the prism is consistent with the support height of the prism at the first joint;

[0024] Among them, j=2,3,…,n.

[0025] More preferably, after the prism is set up at the first joint of the i-th measuring station, the height of the prism is input into the corresponding total station.

[0026] Preferably, the inclination angle of each pipe section is calculated by the following formula:

[0027] L ij =S ij -S i(j-1) ;

[0028] ΔH ij =Hi -H i(j-1) ;

[0029]

[0030] Among them, L ij is the horizontal length of the jth section of the pipeline in the i-th measuring station, S i(j-1) H is the horizontal sight distance of the j-1th joint in the i-th measuring station, i(j-1) is the elevation of the j-1th joint in the i-th measuring station, α ij is the inclination of the j-th pipeline in the ith measuring station.

[0031] Preferably, the rotation angle of each joint is calculated by the following formula:

[0032] Z ij =α ij -α i(j-1) ;

[0033] Among them, α i(j-1) is the rotation angle of the j-1th joint in the i-th measuring station.

[0034] The pipe joint angle measurement method based on the total station provided in the embodiment of the present application, in each measuring station, by setting up the total station upstream of the first pipe joint, and measuring each joint in sequence from upstream to downstream, the number of times the total station is moved is reduced, thereby avoiding the need for frequent station changes. In addition, the total station is used to directly measure the horizontal sight distance and elevation, and then the inclination angle and joint angle of each section of the pipeline are calculated. This process does not require special cleaning of the joints, so it is not affected by the cleanliness of the environment, so that the measurement task can be accurately completed even in a relatively harsh or difficult to clean environment. Since the measurement process does not require frequent station changes, the operation efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 This is a flow chart of a method for measuring the angle of a pipe joint based on a total station provided in one embodiment of the present application;

[0037] Figure 2 It is a schematic diagram of the relationship between the measuring station and the adjacent measuring stations;

[0038] Figure 3 It is a schematic diagram of parameters related to corners and adjacent pipes. DETAILED DESCRIPTION

[0039] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0040] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0041] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0042] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0043] like Figure 1 As shown, the pipe joint angle measurement method based on the total station provided in the embodiment of the present application includes the following steps S101 to S105:

[0044] Step S101: Determine the number and location of measuring stations according to the center line of the water diversion project.

[0045] Step S102: Setting up a total station upstream of the first pipeline joint of the i-th measuring station.

[0046] Step S103: Set up a prism at the jth joint of the i-th measuring station in the order from upstream to downstream, and read the total station data to obtain the horizontal sight distance S of the jth joint in the i-th measuring station. ij and elevation H ij .

[0047] Step S104: Calculate the inclination angle of each pipeline section according to the horizontal sight distance and elevation of each joint.

[0048] Step S105: Calculate the rotation angle of each joint according to the inclination angle of each pipe section.

[0049] Wherein, i=1,2,…,m, m is the number of measuring stations; j=1,2,…,n, n is the number of joints in the i-th measuring station.

[0050] In the application, i=1,2,…,m means i is 1,2,…,to m in sequence. j=1,2,…,n means j is 1,2,…,to n in sequence.

[0051] In the application, first set up a total station upstream of the first pipe joint of the first measuring station, then set up a prism at the first joint of the first measuring station, and read the total station data to obtain the horizontal sight distance and elevation of the first joint of the first measuring station; then set up a prism at the second joint of the first measuring station, and read and record the total station data to obtain the horizontal sight distance and elevation of the second joint of the first measuring station... until a prism is set up at the nth joint of the first measuring station, and the total station data is read to obtain the horizontal sight distance and elevation of the nth joint (i.e. the last joint) of the first measuring station. Then set up a total station upstream of the first pipe joint of the second measuring station, and refer to the operation of the first measuring station to complete the measurement in the second measuring station. Repeat the above operation for each measuring station until all joints of all measuring stations are measured.

[0052] The embodiment of the present application sets up a total station upstream of the first pipe joint in each measuring station, and measures each joint in order from upstream to downstream, thereby reducing the number of times the total station is moved, thereby avoiding the need for frequent station changes. In addition, the total station is used to directly measure the horizontal sight distance and elevation, and then the inclination angle and joint angle of each section of the pipeline are calculated. This process does not require special cleaning of the joints, so it is not affected by the cleanliness of the environment, so that the measurement task can be accurately completed even in a relatively harsh or difficult to clean environment. Since the measurement process does not require frequent station changes, the operation efficiency is high.

[0053] In one embodiment, step S101 includes the following steps S201 to S203:

[0054] Step S201: Obtain pipeline laying path information based on the center line of the water diversion project.

[0055] Step S202: Based on the pipeline laying path, in the cornerless line section, the measurement range of each measuring station of the cornerless line section is divided under the condition that the horizontal sight distance S of each joint is not greater than a preset distance to determine the position of each measuring station of the cornerless line section.

[0056] Step S203: adding a measuring station at the corner of the line;

[0057] The number of measuring stations is the sum of the number of measuring stations set up at the line sections without corners and at the line corners.

[0058] In the application, the centerline provides a specific path for laying the pipeline. Along this centerline, it is possible to identify which areas need to be measured. According to the position of the centerline, the approximate measurement range of each station of the total station can be divided to ensure that each station can cover its corresponding pipeline section. The centerline can also be used to identify the line sections without corners and the line corners.

[0059] In applications, for line sections without corners, in order to ensure measurement accuracy and avoid the influence of the earth's curvature and atmospheric refraction on the measurement results, a maximum horizontal sight distance (300 meters in this embodiment) is usually set. The measuring stations are set based on the basic principle that the horizontal sight distance does not exceed 300 meters. That is, the horizontal distance between each measuring station and the pipeline joint (i.e., prism) of the line section without corners does not exceed 300 meters, so as to reduce the influence of the earth's curvature and atmospheric refraction on the measurement accuracy.

[0060] In applications, the line of sight may be obstructed at the bends of the line or in places with complex terrain. In this case, simply relying on the 300-meter horizontal line of sight principle may not be enough to ensure the measurement quality. The embodiment of the present application also improves the line of sight conditions by adding a measuring station at the corner of the line, thereby ensuring the accuracy of the data.

[0061] The embodiment of the present application determines the pipeline laying path based on the center line of the water diversion project, and plans the location and number of measuring stations based on this, thereby achieving efficient and accurate angle measurement of large-diameter pipe joints. For line sections without corners, the measurement range is divided according to the principle of a horizontal line of sight of no more than 300 meters between each measuring station and the pipe joint, which ensures measurement accuracy while reducing the influence of the earth's curvature and atmospheric refraction. In areas with line corners or complex terrain, the line of sight conditions are optimized by adding measuring stations, further ensuring data accuracy. This method not only avoids the need to frequently move the total station and improves operating efficiency, but also has low requirements for environmental cleanliness and strong adaptability. It can successfully complete the measurement task even in environments that are difficult to clean or have obstructed vision, reflecting the advantages of no need for frequent station transfers, high precision, high efficiency and strong adaptability.

[0062] In one embodiment, after the total station is set up upstream of the first pipe joint of the i-th measuring station, the method further includes configuring parameters of the total station.

[0063] In one embodiment, parameter configuration of the total station includes inputting plane coordinates and elevations of the corresponding measuring stations of the total station, and inputting the measuring height and orientation angle of the total station.

[0064] In applications, such as Figure 2 As shown, to ensure the measurement accuracy, the total station should be set up about 10m upstream (according to the water flow direction) of the first pipe joint in the range of each measuring station; after setting up and leveling the total station, input the plane coordinates and elevation (i.e., altitude) of the assumed measuring station (i.e., the total station placement point), input the measured instrument height of the total station, and set the orientation angle to configure the total station; adjust the height of the prism bracket to be consistent with the instrument height of the total station to avoid the vertical angle of the total station being too large (the vertical angle should be less than 10°); the distance measurement accuracy of the total station should be better than 2mm+2ppm, and the angle measurement accuracy should be better than 5″.

[0065] The embodiment of the present application sets up a total station about 10 meters upstream of the first pipe joint of each measuring station, and configures its precise parameters, including inputting the plane coordinates and elevation of the measuring station, the instrument height and orientation angle of the total station, and adjusting the height of the prism bracket to be consistent with the instrument height of the total station, thereby ensuring that the vertical angle remains within a small range (less than 10°) during the measurement process, thereby effectively improving the measurement accuracy. The total station has a ranging accuracy of better than 2mm+2ppm and an angular measurement accuracy of better than 5", ensuring the reliability and accuracy of the data. In addition, this method reduces the risk of errors caused by excessive vertical angles, and is suitable for measuring the angles of large-diameter pipe joints with high precision requirements. This solution has the significant advantages of high precision, high reliability and high efficiency.

[0066] In one embodiment, setting up a prism at the jth joint of the i-th measuring station comprises:

[0067] Setting up a prism at the first joint of the i-th measuring station, and adjusting the bracket height of the prism to be consistent with the instrument height of the corresponding total station;

[0068] A prism is set up at the jth (j>1) joint of the i-th measuring station, and the bracket height of the prism is consistent with the bracket height of the prism at the first joint, wherein j=2, 3, ..., n.

[0069] In application, the prism is mounted on a centering pole with a level bubble on it for leveling. To control the vertical angle within 10°, the height of the prism bracket is adjusted to be consistent with the height of the total station instrument, and the height of the centering pole of a single station remains unchanged.

[0070] In one embodiment, after the prism is set up at the first joint of the i-th measuring station, the height of the prism is input into the corresponding total station.

[0071] In the application, the height of the prism can be read from the scale on the centering rod. In the same survey station, once the height of the prism is input once, the subsequent prisms do not need to be input again. The total station aims at the center of the prism, measures the slope distance and vertical angle, and the built-in program of the total station automatically calculates the horizontal sight distance and elevation of the joint at the pole, and automatically records them; after the measurement of the joint is completed, the total station does not move, and the centering rod is moved to the next pipe joint, keeping the rod height unchanged to measure the horizontal sight distance and elevation, until all joints within the survey station are measured, and then continue to measure the next survey station.

[0072] The embodiment of the present application achieves high-precision measurement by accurately setting up and adjusting the prism at each joint of each measuring station to ensure that the horizontal line of the center of the prism is basically consistent with the optical axis of the total station. The prism is leveled using the level bubble on the centering rod, and its height is adjusted to keep the vertical angle within 10°, so that the center of the circular prism is basically consistent with the horizontal line of sight of the total station, ensuring the accuracy of data collection. In addition, after the prism height is input for the first time in the same measuring station, it is no longer necessary to input it repeatedly, which simplifies the operation process and reduces the workload of repeated input. The total station automatically measures the slope distance and vertical angle, and calculates the horizontal line of sight and elevation of the joint, realizing efficient data recording and processing. It not only improves the measurement accuracy, but also significantly improves the operating efficiency and reduces human errors. It is particularly suitable for the angle measurement of large-diameter pipe joints that require high precision.

[0073] In one embodiment, Figure 3 As shown, the inclination of each pipe section is calculated by the following formula:

[0074] L ij =S ij -S i(j-1) ;

[0075] ΔH ij =H i -H i(j-1) ;

[0076]

[0077] Among them, L ij is the horizontal length of the jth section of the pipeline in the i-th measuring station, S i(j-1) H is the horizontal sight distance of the j-1th joint in the i-th measuring station, i(j-1) is the elevation of the j-1th joint in the i-th measuring station, α ij is the inclination of the j-th pipeline in the ith measuring station.

[0078] This embodiment obtains the horizontal sight distance and elevation data at each pipeline joint accurately, and calculates the horizontal length and elevation difference of each section of the pipeline according to the above calculation formula, thereby obtaining the pipeline inclination. This method uses actual measurement data to directly perform calculations, ensuring the high accuracy and reliability of the calculation results. It can accurately reflect the true inclination of each section of the pipeline based on the field measured data, which not only reduces the errors caused by theoretical assumptions, but also improves the ability to adapt to complex terrain. In addition, this systematic measurement and calculation method simplifies the operation process and improves work efficiency, so that the pipeline inclination measurement work can be completed efficiently and accurately even in a large range or under complex conditions.

[0079] In one embodiment, the rotation angle of each joint is calculated by the following formula:

[0080] Z ij =α ij -α i(j-1) ;

[0081] Among them, α i(j-1) is the rotation angle of the j-1th joint in the i-th measuring station.

[0082] The embodiment of the present application directly calculates the angle based on the actual measurement data of the adjacent pipeline sections, ensuring the high accuracy and reliability of the calculation results. It can effectively reflect the actual situation on site and reduce the errors caused by theoretical assumptions and indirect measurements. In addition, since the inclination angle of each section of the pipeline is independently measured and calculated, high-precision measurement results can be guaranteed even in the face of complex terrain or changing conditions. This method not only improves the efficiency of the measurement work, but also simplifies the operation process, making the measurement of the angle of large-diameter pipeline joints more systematic and standardized, with the characteristics of high precision, strong adaptability and efficient processing.

[0083] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0084] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for measuring the rotation angle of a pipe joint based on a total station, characterized in that: include: Determine the number and location of measuring stations based on the centerline of the water diversion project; Set up a total station upstream of the first pipeline joint of the i-th measuring station; In order from upstream to downstream, a prism is set up at the jth joint of the i-th measuring station, and the total station data is read to obtain the horizontal sight distance S of the jth joint in the i-th measuring station. ij and elevation H ij ; Calculate the inclination of each pipe section based on the horizontal sight distance and elevation of each joint; Calculate the rotation angle of each joint according to the inclination angle of each pipe section; Where, i = 1, 2, ..., m, m is the number of measuring stations; j=1,2,…,n, where n is the number of joints in the i-th measuring station.

2. The method for measuring the pipe joint angle based on a total station as claimed in claim 1, characterized in that: Determining the number and location of measuring stations based on the center line of the water diversion project includes: According to the center line of the water diversion project, obtain the pipeline laying path information; Based on the pipeline laying path, in the line section without corners, the measurement range of each measuring station of the line section without corners is divided under the condition that the horizontal sight distance S of each joint is not greater than a preset distance, so as to determine the position of each measuring station of the line section without corners; Adding measuring stations at line corners; The number of measuring stations is the sum of the number of measuring stations set at the non-corner line section and the number of measuring stations set at the line corners.

3. The method for measuring the pipe joint angle based on a total station as claimed in claim 1, characterized in that: After the total station is set up upstream of the first pipeline joint of the i-th measuring station, the method further includes configuring parameters of the total station.

4. The method for measuring the angle of a pipe joint based on a total station as claimed in claim 3, characterized in that: The total station is configured with parameters, including inputting the plane coordinates and elevation of the measuring station corresponding to the total station, and inputting the instrument height and orientation angle of the total station.

5. The method for measuring the angle of a pipe joint based on a total station as claimed in claim 1, wherein a prism is set up at the jth joint of the i-th measuring station, characterized in that: Setting up a prism at the first joint of the i-th measuring station, and adjusting the bracket height of the prism to be consistent with the instrument height of the corresponding total station; Setting up a prism at the jth joint of the i-th measuring station so that the support height of the prism is consistent with the support height of the prism at the first joint; Among them, j=2,3,…,n.

6. The method for measuring the pipe joint angle based on a total station as claimed in claim 5, characterized in that: After the prism is set up at the first joint of the i-th measuring station, the height of the prism is input into the corresponding total station.

7. The method for measuring the angle of a pipe joint based on a total station as claimed in claim 1, characterized in that: The inclination of each pipe section is calculated by the following formula: L ij =S ij -S i(j-1) ; ΔH ij =H i -H i(j-1) ; Among them, L ij is the horizontal length of the jth section of the pipeline in the i-th measuring station, S i(j-1) H is the horizontal sight distance of the j-1th joint in the i-th measuring station, i(j-1) is the elevation of the j-1th joint in the i-th measuring station, α ij is the inclination of the j-th pipeline in the ith measuring station.

8. The method for measuring the pipe joint rotation angle based on a total station as claimed in claim 7, characterized in that: The rotation angle of each joint is calculated by the following formula: Z ij ＝α ij -α i(j-1) ； Among them, α i(j-1) is the rotation angle of the j-1th joint in the i-th measuring station.

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