A method for identifying the internal obtuse angle formed by the intersection of three sides with distance measurement in construction engineering

Abstract

The present application relates to a method for identifying the internal corner formed by the intersection of three sides in a building project by distance measurement, mainly in the technical field of point measurement in building projects, and it includes the following steps: Arbitrarily select a point in the space near the intersection point of the three sides as the measurement origin P; Select a detection circle with an appropriate radius R, and the projection of the detection circle on the intersection plane is the detection area S1; Use a measuring tool to measure the distances from the measurement origin P to each point in the detection area S1; Record and sort the distances from the measurement origin P to each point in the detection area S1, and the point with the largest distance is P1, and the distance value is D1; Adjust the measuring tool, and re-project the detection circle with P1 as the projection center to form a detection area S2, etc. The present application has the advantages of high detection accuracy, easy operation, and easy implementation of automation, etc.

Description

Technical Field

[0001] The present application relates to the technical field of point measurement in construction engineering, and particularly to a method for identifying the internal angle of a building by three-sided intersection with distance measurement in construction engineering. Background Art

[0002] In construction engineering, a three-axis coordinate system is usually used to describe and determine the relative positions and distances of each point in the three-dimensional space of a building. The establishment of the three-axis coordinate system first requires the determination of the position of the coordinate origin. In the three-axis coordinate system used to describe the interior space of a building, the coordinate origin is generally selected at the internal angle point where three sides of the building intersect. Therefore, it is necessary to determine the actual position of the internal angle point where three sides of the building intersect.

[0003] Currently, the common method for determining the position of the internal angle point is the visual inspection method. The surveying and mapping personnel need to determine the position of the intersection point of the three sides of the building, that is, the internal angle point, by observation and directly measure the distance, and then measure the vertical distances from the distance measurement point to at least two building surfaces. Finally, a three-axis rectangular coordinate system is established based on the above data. Due to the error between the actual position and the visually measured position of the internal angle point, and there are also certain measurement errors in the measurement equipment itself, the combined effect results in limited accuracy of the three-axis rectangular coordinate system established by the visual inspection method, which has an adverse impact on the accuracy of the measurement of spatial points and distances and the subsequent construction quality.

[0004] Regarding the above related technologies, the inventor believes that the existing methods for identifying and determining the internal angle point have the defect of large errors, which will lead to defects in the accuracy of the subsequent establishment of the three-axis rectangular coordinate system and the construction quality. Summary of the Invention

[0005] In order to improve the construction quality of indoor buildings and the accuracy of the three-axis rectangular coordinate system for indoor use, the present application provides a method for identifying the internal angle of a building by three-sided intersection with distance measurement in construction engineering.

[0006] A method for identifying the internal angle of a building by three-sided intersection with distance measurement in construction engineering provided by the present application adopts the following technical solutions:

[0007] A method for identifying the internal angle of a building by three-sided intersection with distance measurement in construction engineering includes the following steps:

[0008] Step 1: Arbitrarily select a point in the space near the three-sided intersection point as the measurement origin P;

[0009] Step 2: Select a detection circle radius R of an appropriate size, and the projection of the detection circle on the intersection plane is the detection area S1;

[0010] Step 3: Use a measuring tool to measure the distances from the measurement origin P to each point in the detection area S1;

[0011] Step 4: Record and sort the distances from the measurement origin P to each point in the detection area S1. The point with the largest distance is P1, and the distance value is D1.

[0012] Step 5: Adjust the measuring tool to re-project the detection circle with P1 as the projection center and form a detection area S2.

[0013] Step 6: Use the measuring tool to measure the distances from the measurement origin P to each point in the new detection area S2.

[0014] Step 7: Record and sort the distances from the measurement origin P to each point in the detection area S2. The point with the largest distance is P2, and the distance value is D2.

[0015] Step 8: Repeat the above steps until D n+1 =D n , at this time, the point P n+1 is the internal corner point.

[0016] By adopting the above technical solution and combining with the Pythagorean theorem, it can be obtained that for any point in the space near the internal corner point where three planes meet, the distance to the internal corner point is greater than the straight-line distance from any point to any point in the plane. Therefore, the maximum distance and the position where the maximum distance occurs can be screened out by repeatedly re-determining the measurement range and comparing multiple measurements. The obtained internal corner point is the internal corner where three sides of the building interior meet, which has higher accuracy compared to the visual inspection method. The position of the screened internal corner point and the distance value are unique. The measurement method can eliminate part of the data distortion caused by the system error of the measurement equipment itself, achieving the invention purpose of improving the quality of indoor building construction and the accuracy of the three-axis rectangular coordinate system used indoors.

[0017] Optionally, the radius R of the detection circle in Step 2 is 100 mm to 500 mm.

[0018] By adopting the above technical solution, selecting the radius of the detection circle in the range of 100 millimeters to 500 millimeters can minimize the number of measurement points required for a single measurement while ensuring the measurement accuracy, reduce the number of measurements, and improve the measurement efficiency.

[0019] Optionally, in Step 4, draw a grid for the detection area S1, measure the distances of the grid points in the detection area S1, and obtain the variation law of the distance values.

[0020] By adopting the above technical solution, before measuring each point in the detection area S1, exploring the law between the distances of multiple points in the detection area S1 and their positions in the detection area S1 by drawing a grid can conveniently and quickly find the position of the point with the largest distance in the detection area S1, reduce the number of points to be measured, and improve the measurement accuracy and efficiency.

[0021] Optionally, in step 4, the size of the drawn grid is 10 mm * 10 mm.

[0022] By adopting the above technical solution, the side length of the drawn grid is selected to be 10 millimeters, which can control the number of intersections between the grid and the edge of the detection area S1 at an appropriate level, and can clearly describe the relationship between the distances of the points within the detection area S1 and their positions.

[0023] Optionally, in step 4, the grid is etched on a transparent plate, and the side of the transparent plate close to the building is a smooth surface.

[0024] By adopting the above technical solution, the transparent plate will not affect the distance measurement process, and the grid etched on the transparent plate can be reused in different detection areas, avoiding the process of redrawing the grid, and greatly improving the efficiency of the distance measurement and point position determination processes.

[0025] Optionally, the measuring tool in step 3 is a phase laser rangefinder.

[0026] By adopting the above technical solution, using a phase laser rangefinder with a graduation value not greater than 0.1 millimeter can significantly reduce the systematic error generated in the measurement process and further improve the accuracy of point position determination.

[0027] Optionally, the phase laser rangefinder in step 3 includes a rangefinder body and a support frame; the support frame includes a support base and a plurality of support legs rotatably connected to the support base, and the support base is rotatably connected to the rangefinder body.

[0028] By adopting the above technical solution, the support frame plays a role of supporting and limiting the rangefinder body. The rangefinder body installed on the support frame is more convenient to adjust the rotation angle, facilitating aiming at different detection areas for measurement. The support base plays a supporting role for the rangefinder body, and the support legs can stably fix the support base on the horizontal ground.

[0029] Optionally, a point light source is provided on the rangefinder body parallel to the rangefinder laser emission direction.

[0030] By adopting the above technical solution, the point light source provided at the same position as the rangefinder laser emission direction on the rangefinder body can display the projection position of the detection area on the building wall, facilitating the detection personnel to determine the detection area.

[0031] Optionally, the support legs are multi-section telescopic rods, and an anti-slip plate is provided at the end of the support legs close to the ground.

[0032] By adopting the above technical solution, the support leg is set as a multi-section telescopic rod structure, which can facilitate the height adjustment of the rangefinder body along the direction perpendicular to the ground, so as to measure the distances of different points in the detection area. The anti-slip plate installed on the section of the support leg close to the ground can increase the contact friction between the support leg and the ground, and avoid relative sliding between the rangefinder body and the ground during use.

[0033] Optionally, after the detection area S2 is formed in step 5, a visible laser beam is emitted from the measurement origin P to P1, and the perpendicularity of the laser beam to the plane where the detection circle is located is measured and the position of P1 is adjusted.

[0034] By adopting the above technical solution, after the detection area S2 is formed, the visible laser beam emitted from the measurement origin P to P1 should be perpendicular to the plane where the detection circle is located. Therefore, the position of P1 can be adjusted in reverse by verifying the perpendicularity between the visible laser beam and the plane where the detection circle is located, further reducing the measurement error.

[0035] In summary, the present application includes at least one of the following beneficial technical effects:

[0036] 1. In the present application, the maximum value of the distance and the position where the distance is the largest are screened out by repeatedly determining the measurement range and comparing multiple measurements. The position is the internal corner point where the three sides of the building meet indoors. Compared with the visual inspection method, it has higher accuracy. The position and distance of the screened internal corner point are unique. The measurement method can eliminate part of the data distortion caused by the system error of the measurement equipment itself, achieving the invention purpose of improving the quality of indoor building construction and the accuracy of the three-axis rectangular coordinate system used indoors.

[0037] 2. Before measuring each point in the detection area S1 in the present application, by drawing a grid to explore the law of the distances of multiple points in the detection area S1 and their positions in the detection area S1, it is convenient to quickly find the position of the point with the largest distance in the detection area S1, reduce the number of points to be measured, and improve the measurement accuracy and efficiency.

[0038] 3. Before measuring each point in the detection area S1 in the present application, by drawing a grid to explore the law of the distances of multiple points in the detection area S1 and their positions in the detection area S1, it is convenient to quickly find the position of the point with the largest distance in the detection area S1, reduce the number of points to be measured, and improve the measurement accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the steps of a method for identifying the internal corner of three-sided intersection by distance measurement in a construction project disclosed in an embodiment of the present application.

[0040] Figure 2 It is a schematic structural diagram of a phase-type laser rangefinder in an embodiment of the present application.

[0041] Figure 3 It is a schematic diagram of the measurement process in an embodiment of the present application.

[0042] Explanation of reference numerals: 1, rangefinder body; 11, point light source; 2, support frame; 21, support base; 22, support legs; 23, anti-slip plate. Detailed implementation manners

[0043] The following will further elaborate on the present application in conjunction with the attached Figure 1 - attached Figure 3 drawings.

[0044] In construction engineering, a three-axis coordinate system is usually used to describe and determine the relative positions and distances of various points in the three-dimensional space of a building. The establishment of the three-axis coordinate system first requires determining the position of the coordinate origin. In the three-axis coordinate system used to describe the indoor space of a building, the coordinate origin is generally selected as the interior corner point where three sides of the building meet. Therefore, it is necessary to determine the actual position of the interior corner point where three sides of the building meet. Currently, the common method for determining the position of the interior corner point is the visual inspection method. Surveyors need to determine the position of the intersection point of the three sides of the building, that is, the interior corner point, by visual observation and directly measure the distance, and then measure the perpendicular distances from the measurement point to at least two building surfaces. Finally, a three-axis rectangular coordinate system is established based on the above data. Due to the error between the actual position and the visually estimated position of the interior corner point, and there are also certain measurement errors in the measurement equipment itself, the combined effect results in limited accuracy of the three-axis rectangular coordinate system established by the visual inspection method, which has an adverse impact on the accuracy of calculating the spatial points and distances and the subsequent construction quality. In order to improve the construction quality of indoor buildings and the accuracy of the three-axis rectangular coordinate system for indoor use, the present application provides a method for identifying the interior corner of a three-sided intersection by range measurement in construction engineering.

[0045] An embodiment of the present application discloses a method for identifying the interior corner of a three-sided intersection by range measurement in construction engineering. Referring to Figure 1 , the method for identifying the interior corner of a three-sided intersection by range measurement in construction engineering includes the following steps:

[0046] Step 1, arbitrarily select a point in the space near the three-sided intersection point as the measurement origin P.

[0047] Referring to Figure 1 and Figure 3 , in this step, the selection of the measurement origin P is arbitrary, but it should be selected as close as possible to the space of the interior corner point in combination with the limitations of the actual site and the measuring range of the measuring equipment, so as to reduce the actual number of measurements required and improve the positioning accuracy and measurement efficiency. The starting point of the measuring equipment is the measurement origin P, so the measuring equipment should be fixed after the measurement origin P is selected.

[0048] Step 2: Select a detection circle radius R of appropriate size. The projection of the detection circle on the intersection plane is the detection area S1.

[0049] Refer to Figure 1 and Figure 3 , in this step, the size of the detection circle radius R should be determined according to the approximate distance from the measurement origin P to the internal corner point, and an appropriate value should be selected from the range of 100 to 500 millimeters. An opaque circular plate with a circular through-hole in the center can be selected as the physical substitute for the detection circle. The circular plate is arranged perpendicular to the projection direction of the measuring device. The circular through-hole opened at the center position of the circular plate can avoid interfering with the normal use of the measuring device. The elliptical projection of the circular plate on the indoor plane of the building is the shape of the detection area.

[0050] Step 3: Use a measuring tool to measure the distances from the measurement origin P to each point in the detection area S1.

[0051] Refer to Figure 1 and Figure 3 , in this step, the distances between each point in the detection area S1 and the measurement origin P need to be measured one by one. This step can be automatically performed by presetting a measurement program in the measuring device, thereby further improving the efficiency and automation level of the measurement process. Refer to Figure 2 , a phase-type laser rangefinder can be selected as the measuring device. The phase-type laser rangefinder includes a rangefinder body 1 and a support frame 2. A point light source 11 is arranged at the top of the rangefinder body 1. The irradiation direction of the point light source 11 is parallel to the ranging laser emission direction of the rangefinder body 1. The point light source 11 can emit non-parallel light beams to the building plane, thereby helping to determine the actual range of the detection area S1. The support frame 2 includes a support base 21, support legs 22, and an anti-slip plate 23. The support base 21 is rotatably connected to the rangefinder body 1. The three support legs 22 are evenly distributed along the edge of the support base 21 and are all rotatably connected to the support base 21. The support legs 22 can be selected as multi-section telescopic rods to facilitate adjusting the vertical height of the rangefinder body 1. An anti-slip plate 23 is arranged at one end of the support leg 22 close to the ground. Anti-slip patterns are arranged on the anti-slip plate 23, which can increase the relative friction with the ground.

[0052] Step 4: Record and sort the distances from the measurement origin P to each point in the detection area S1. The point with the largest distance is P1, and the distance value is D1.

[0053] Refer to Figure 1 and Figure 3, in this step, it is necessary to sort the magnitudes of the straight-line distances from each point measured in step 3 to the measurement origin P. This step can be automatically carried out by presetting a measurement program in the measuring device, thereby further improving the efficiency and automation level of the measurement process. Before performing this step, a grid can be drawn for the range where the detection area S1 is located. The size of the grid can be a 10 mm * 10 mm square. Compare the distances of the grid points falling within the detection area S1 to initially obtain the relationship between the positions of the grid points and the distances between them and the measurement origin P, so as to find the point P1 with the largest distance. Re-measure the distance of this point and compare it with the magnitude of D1, select the larger value, and use the point where the larger value is located as the projection center of the detection area S2. The grid can be drawn on a transparent rectangular plate by etching. The rectangular plate can be made of acrylic material. The transparent grid plate is convenient for repeated use, improves efficiency, and can avoid affecting the measurement process. When using a transparent plate as the grid plate, the smooth surface of the transparent plate should be the side close to the building to reduce the impact of the etching pattern on the measurement accuracy.

[0054] Step 5, adjust the measuring tool, and re-project the detection circle with P1 as the projection center to form the detection area S2.

[0055] Refer to Figure 1 and Figure 3 , in this step, use P1 determined in step 4 as the projection center to re-project the detection circle and form the detection area S2. After forming the detection area S2, emit a visible laser beam from the measurement origin P to P1, measure the perpendicularity of the laser beam to the plane where the detection circle is located, and adjust the position of P1 to reduce the measurement error and improve the positioning accuracy.

[0056] Step 6, use the measuring tool to measure the distances from the measurement origin P to each point in the new detection area S2.

[0057] Refer to Figure 1 and Figure 3 , in this step, it is necessary to measure one by one the distances between each point in the detection area S2 and the measurement origin P. This step can be automatically carried out by presetting a measurement program in the measuring device, thereby further improving the efficiency and automation level of the measurement process.

[0058] Step 7, record and sort the distances from the measurement origin P to each point in the detection area S2. The point with the largest distance is P2, and the distance magnitude is D2.

[0059] Refer to Figure 1 and Figure 3, in this step, it is necessary to sort the magnitudes of the straight-line distances from each point measured in step 6 to the measurement origin P. This step can be automatically performed by presetting a measurement program in the measuring device, thereby further improving the efficiency and automation level of the measurement process. Before performing this step, a grid can be drawn for the range where the detection area S2 is located. The variation law of the straight-line distances from each point in the detection area S2 to the measurement origin P can be obtained.

[0060] Step 8, repeat the above steps until D n+1 =D n , at this time, the point P n+1 is the internal corner point.

[0061] Refer to Figure 1 and Figure 3 , in this step, after obtaining two identical straight-line distances, the point where the straight-line distance is located is the internal corner point where three sides of the building meet.

[0062] The above are all preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A method for identifying the internal corner formed by the intersection of three sides with distance measurement in construction engineering, characterized in that, It includes the following steps: Step 1: Arbitrarily select a point as the measurement origin P in the space near the three-plane intersection point; Step 2: Select a detection circle with an appropriate radius R. The projection of the detection circle on the intersection plane is the detection area S1; Step 3: Use a measuring tool to measure the distances from the measurement origin P to each point in the detection area S1; Step 4: Record and sort the distances from the measurement origin P to each point in the detection area S1. The point with the maximum distance is P1, and the distance value is D1; Step 5: Adjust the measuring tool, and re-project the detection circle with P1 as the projection center to form a detection area S2; Step 6: Use a measuring tool to measure the distances from the measurement origin P to each point in the new detection area S2; Step 7: Record and sort the distances from the measurement origin P to each point in the detection area S2. The point with the maximum distance is P2, and the distance value is D2; Step 8, repeat the above steps until D n+1 = D n , at this time, the point P n+1 is the internal corner point.

2. The method for identifying the internal corner formed by the intersection of three sides with ranging in construction engineering according to claim 1, wherein: The radius R of the detection circle in Step 2 is 100 mm to 500 mm.

3. A method for identifying the internal corner formed by the intersection of three sides with distance measurement in construction engineering according to claim 1, characterized in that: In Step 4, draw a grid on the detection area S1, measure the distances of the grid points in the detection area S1, and obtain the variation law of the distance values.

4. A method for identifying the internal corner of a building project by three - side intersection with distance measurement according to claim 3, characterized in that: In Step 4, the size of the drawn grid is 10 mm * 10 mm.

5. A method for identifying the internal corner formed by the intersection of three sides with distance measurement in construction engineering according to claim 4, characterized in that: In Step 4, etch the grid on a transparent plate, and the side of the transparent plate close to the building is a smooth surface.

6. The method for identifying the internal corner formed by the intersection of three sides with ranging in construction engineering according to claim 1, characterized in that: The measuring tool in Step 3 is a phase-type laser rangefinder.

7. A method for identifying the internal corner formed by the intersection of three sides with distance measurement in construction engineering according to claim 6, characterized in that: The phase-type laser rangefinder in Step 3 includes a rangefinder body (1) and a support frame (2); the support frame (2) includes a support base (21) and a plurality of support legs (22) rotatably connected to the support base (21), and the support base (21) is rotatably connected to the rangefinder body (1).

8. A method for identifying the internal obtuse angle of three-sided intersection with distance measurement in construction engineering according to claim 7, characterized in that: A point light source (11) is provided on the rangefinder body (1) parallel to the rangefinder laser emission direction.

9. A method for identifying the internal corner formed by the intersection of three sides with ranging in construction engineering according to claim 7, characterized in that: The support legs (22) are multi-segment telescopic rods, and an anti-slip plate (23) is provided at the end of the support legs (22) close to the ground.

10. A method for identifying the internal corner formed by the intersection of three sides with ranging in construction engineering according to claim 1, characterized in that: After forming the detection area S2 in Step 5, emit a visible laser beam from the measurement origin P to P1, measure the perpendicularity of the laser beam to the plane where the detection circle is located, and adjust the position of P1.

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