Device and method for measuring perpendicularity of regular curved surface steel structure

Abstract

The invention provides a regular curved surface steel structure verticality measuring device and a measuring method thereof.The regular curved surface steel structure verticality measuring device comprises a to-be-measured body, the top of the to-be-measured body is provided with a measuring device, the measuring device comprises a sphere positioning mechanism, the bottom of the sphere positioning mechanism is provided with a rotating frame, the bottom of the rotating frame is provided with a sliding block, and one end of the sliding block is provided with a rotating plate; one end of the rotating plate abuts against the to-be-detected body. According to the overall structure, the connecting line of the multiple second mark points can be rapidly parallel to the bus of the to-be-measured body, the sphere positioning mechanism can adapt to different types of regular curved surface steel structures, the laser projector and the photogrammetry technology are combined, the perpendicularity can be rapidly measured, the measurement precision is greatly improved, and the measurement cost is reduced. And human errors and measurement errors caused by a curved surface structure are prevented from being introduced when perpendicularity is measured by using a plumb bob method and a total station, so that the perpendicularity measurement precision of the regular curved surface steel structure is greatly improved, and the method has a relatively high popularization value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water conservancy and hydropower verticality measurement, in particular to a regular curved surface steel structure verticality measurement device and a measurement method thereof. BACKGROUND

[0002] The regular curved surface steel structure verticality measurement is commonly used in water conservancy and hydropower engineering metal structure installation construction and in-service maintenance evaluation, for example, the vertical oil cylinder and piston rod of the arc gate hoist, cylindrical, circular truncated cone, conical, spherical steel structure, which needs to bear a large tensile force and pressure in the vertical direction. If the verticality is large, the stress will be greatly increased, causing equipment damage.

[0003] At present, the line hammer method and total station measurement method are commonly used to measure the verticality of the regular curved surface steel structure, and the deviations of the upper and lower ends of the regular curved surface steel structure in the vertical direction are measured. However, since the measured object is a regular curved surface, the measurement points are on the curved surface, it is difficult to ensure that the multiple measurement points on the upper and lower ends are on the same straight line, and it is even more difficult to ensure that the multiple measurement points are on the same generatrix of the regular curved surface, resulting in measurement error, which may lead to misjudgment of the safety state of the equipment, aggravate equipment damage, and shorten the service life. SUMMARY

[0004] The present application provides a regular curved surface steel structure verticality measurement device and a measurement method thereof, which solves the problem that the line hammer method and total station measurement method are used to measure the regular curved surface steel structure, and it is difficult to ensure that the multiple measurement points on the upper and lower ends are on the same straight line, and it is even more difficult to ensure that the multiple measurement points are on the same generatrix of the regular curved surface, resulting in measurement error, which may lead to misjudgment of the safety state of the equipment, aggravate equipment damage, and shorten the service life.

[0005] To solve the above technical problems, the technical solution adopted by the present application is: a regular curved surface steel structure verticality measurement device and a measurement method thereof, comprising a measured body, a measurement device is arranged on the top of the measured body, the measurement device comprises a circular body positioning mechanism, a rotating rotating frame is arranged at the bottom of the circular body positioning mechanism, a sliding sliding block is arranged at the bottom of the rotating frame, a rotating rotating plate is arranged at one end of the sliding block, and the rotating plate abuts against the measured body.

[0006] In the preferred scheme, the circular body positioning mechanism comprises a top plate, a rotating rotating frame is arranged on the top plate, a plurality of rotating clamping mechanisms are arranged on the top plate, a rotating driving device is arranged on the top plate, a clamping wheel is arranged at one end of the clamping mechanism, and the clamping wheel abuts against the measured body.

[0007] In the preferred scheme, the bottom of the top plate is provided with a first annular groove and a second annular groove, the middle of the top plate is provided with a first through hole, and the bottom of the top plate is provided with a second rotating seat and a plurality of first rotating seats.

[0008] In the preferred scheme, the rotating frame includes a frame body, the frame body is provided with a plurality of arc-shaped grooves, one side of the frame body is provided with a rotating plate, and one end of the frame body is provided with a ring body abutting against the first annular groove. The clamping mechanism includes a rotating sleeve, the rotating sleeve is provided with a rotating rod, a clamping wheel is installed at one end of the rotating rod, and the other end of the rotating rod is rotationally connected with the first rotating seat.

[0009] In the preferred scheme, the driving device includes a motor seat and a threaded seat, the motor seat is rotationally connected with the second rotating seat, the threaded seat is rotationally connected with the rotating plate, the motor seat is provided with a first motor, the output shaft of the first motor is provided with a lead screw, and the lead screw is connected with the threaded seat.

[0010] In the preferred scheme, one end of the rotating frame is provided with a gear ring, one end of the gear ring is provided with a ring body abutting against the second annular groove, the top of the top plate is provided with a driving mechanism, and the driving mechanism includes a second motor, one end of the second motor is provided with a gear, and the gear is engaged with the gear ring.

[0011] In the preferred scheme, the bottom of the rotating frame is provided with a sliding rail, a sliding block abuts against the sliding rail and slides thereon, one end of the sliding block is provided with a support plate, and one end of the rotating plate is rotationally connected with the support plate.

[0012] In the preferred scheme, both ends of the rotating plate are provided with abutting wheels, one end of the rotating plate is provided with a magnet, and the abutting wheel close to the magnet abuts against the measured body, and the rotating plate is provided with a plurality of second markers.

[0013] In the preferred scheme, the measured body is externally provided with a laser projector, a photogrammetry camera and at least two building surfaces, and the building surfaces are provided with a plurality of first markers.

[0014] A measuring method of a regular curved surface steel structure perpendicularity measuring device is characterized in that: S1, the measuring device is installed on the top of the measured body, and the measured body is hoisted by a suspender; S2, the measured body is positioned: the first motor of the driving device is started, a plurality of clamping mechanisms clamp the measured body, and the driving mechanism and the driving cylinder are started to make the two abutting wheels abut against the measured body; S3, a horizontal plane is projected by the laser projector, the horizontal plane intersects with the building surface to form at least two horizontal lines, and the first markers are arranged on the horizontal lines; S4, the photogrammetry camera takes a picture to extract all the first markers, obtains the relative coordinate information of all the first markers, and fits all the points into a horizontal plane; S5, the second markers on the surface of the regular curved surface steel structure measured body are fitted into a cylinder or a cone, and a central axis is generated by fitting. S6, the angle between the central axis and the horizontal plane is calculated automatically by using the photogrammetry data processing system, and the perpendicularity of the measured body is, wherein is the actual length or gauge length of the measured body.

[0015] The beneficial effects of the present application are: the measuring device is installed on the top of the measured body, the surface of the measured body is a regular curved surface, the first motor in the driving device is turned on to rotate the lead screw, to move the threaded seat relative to the lead screw, to rotate the rotating frame, to make the rotating rods of the plurality of clamping mechanisms extend and retract relative to the rotating sleeve, to make the clamping wheels at one end of the plurality of rotating rods abut against the measured body, to make the axis of the measuring device coincide with the axis of the measured body.

[0016] The second motor of the driving mechanism is turned on to rotate the gear, to rotate the rotating frame, to rotate the rotating plate at the bottom of the rotating frame, to make the plurality of second mark points on the rotating plate face the side of the laser projector, and the laser projector can irradiate the second mark points. The cylinder is driven to extend and retract the sliding block, to rotate the rotating plate relative to the surface of the measured body, when the two abutting wheels of the rotating plate abut against the measured body, the rotating plate is parallel to the surface of the measured body, to make the line connecting the plurality of second mark points parallel to the generatrix of the measured body.

[0017] The overall structure can quickly make the line connecting the plurality of second mark points parallel to the generatrix of the measured body, the circular body positioning mechanism can adapt to different types of regular curved surface steel structures, and is suitable for regular curved surface steel structures of different diameters. Combined with the laser projector and the photogrammetry technology, the perpendicularity can be quickly measured, the measurement accuracy is greatly improved, the human error introduced when the perpendicularity is measured by using the plumb bob method and the total station instrument, and the measurement error caused by the curved surface structure are avoided, the perpendicularity measurement accuracy of the regular curved surface steel structure is greatly improved, and the phenomenon of inaccurate measurement of the perpendicularity, large deviation, greatly increased local stress, caused structural deformation, cracks, even rupture and aggravated equipment damage, and shortened service life is avoided. It has great popularization value. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in conjunction with the drawings and examples; Figure 1 is a measurement schematic diagram of the overall structure of the present application; Figure 2 is an axial side view of the measuring device and the measured body of the present application; Figure 3 is an axial side view of the measuring device and the measured body of the present application from another angle; Figure 4 is an exploded view of the measuring device of the present application; Figure 5 is an axial side view of the circular body positioning mechanism of the present application; Figure 6It is an exploded view of the circular body positioning mechanism of the present invention; Figure 7 It is an axonometric view of a partial structure of the present invention; Figure 8 It is an axonometric view of a partial structure of the present invention; Figure 9 It is an exploded view of a local structure of the present invention; Figure 10 This invention Figure 9 A magnified view of center A; In the figure: measuring device 1; object to be measured 2; circular body positioning mechanism 3; top plate 4; first annular groove 401; second annular groove 402; first through hole 403; first rotating seat 404; second rotating seat 405; rotating frame 5; frame body 501; arc groove 502; rotating plate 503; clamping mechanism 6; rotating rod 601; rotating sleeve 602; clamping wheel 603; driving device 7; motor seat 701; screw rod 702; threaded seat 703; first motor 704; rotating frame 8; ring body 801; gear ring 802; slide rail 803; driving mechanism 9; second motor 901; gear 902; slider 10; support plate 1001; rotating plate 11; abutting wheel 1101; magnet 1102; cylinder 12; first marking point 13; second marking point 14; building surface 15; laser projector 16. DETAILED DESCRIPTION

[0019] Example 1: like Figure 1-10 A device and method for measuring the verticality of a regularly curved steel structure are disclosed. The device includes a measured object 2, a measuring device 1 disposed on top of the measured object 2, and a circular body positioning mechanism 3. A rotating turret 8 is disposed at the bottom of the turret 8, and a sliding slider 10 is disposed at the bottom of the turret 8. A rotating rotating plate 11 is disposed at one end of the slider 10, and one end of the rotating plate 11 rests against the measured object 2. With this structure, a plurality of second marking points 14 are disposed on the rotating plate 11, so that the plurality of second marking points 14 are aligned on the same straight line.

[0020] The measuring device 1 is installed on the top of the object to be measured 2, and the surface of the object to be measured 2 is a regular curved surface. The first motor 704 in the driving device 7 is turned on to rotate the screw rod 702, so that the threaded seat 703 moves relative to the screw rod 702, so that the rotating frame 5 rotates, so that the rotating rods 601 of the multiple clamping mechanisms 6 are extended and retracted relative to the rotating sleeve 602, so that the clamping wheels 603 at one end of the multiple rotating rods 601 abut against the object to be measured 2, so that the axis center of the measuring device 1 coincides with the axis center of the object to be measured 2.

[0021] The second motor 901 of the driving mechanism 9 is turned on to rotate the gear 902, thereby rotating the rotating frame 8, and rotating the rotating plate 11 at the bottom of the rotating frame 8, so that the multiple second marking points 14 on the rotating plate 11 face the side of the laser projector 16, so that the laser projector 16 can illuminate the second marking points 14. The cylinder 12 is driven to extend and retract the slider 10, so that the rotating plate 11 rotates relative to the surface of the object to be measured 2. When both abutting wheels 1101 of the rotating plate 11 abut against the object to be measured 2, the rotating plate 11 and the surface of the object to be measured 2 are parallel, so that the line connecting the multiple second marking points 14 is parallel to the generatrix of the object to be measured 2.

[0022] The overall structure can quickly make the connecting line of multiple second marking points 14 parallel to the busbar of the object to be measured 2. The circular positioning mechanism 3 can adapt to different types of regular curved steel structures and is suitable for regular curved steel structures of different diameters. Combined with the laser projector 16 and photogrammetry technology, it can quickly measure verticality, greatly improving the measurement accuracy, avoiding the introduction of human errors when measuring verticality using the plumb line method and total station, as well as measurement errors caused by the curved surface structure, greatly improving the verticality measurement accuracy of the regular curved steel structure, and at the same time avoiding the inability to accurately measure verticality. Excessive deviation will greatly increase local stress, leading to misjudgment of the safety status of the equipment. Long-term use may cause structural deformation, cracks or even fractures and aggravate equipment damage, shortening the service life.

[0023] In a preferred embodiment, the circular body positioning mechanism 3 includes a top plate 4, on which is provided a rotating swivel frame 5, on which are provided a plurality of rotatably connected clamping mechanisms 6, on which is provided a rotatably connected driving device 7, and on which is provided a clamping wheel 603 at one end of the clamping mechanism 6, which abuts against the object to be measured 2. With this structure, the measuring device 1 is mounted on top of the object to be measured 2, which has a regular curved surface. The first motor 704 in the driving device 7 is turned on to rotate the screw rod 702, thereby moving the threaded seat 703 relative to the screw rod 702, thereby rotating the swivel frame 5, thereby causing the rotating rods 601 of the plurality of clamping mechanisms 6 to extend and retract relative to the rotating sleeve 602, thereby causing the clamping wheels 603 at one end of the plurality of rotating rods 601 to abut against the object to be measured 2, so that the axis of the measuring device 1 coincides with the axis of the object to be measured 2.

[0024] The circular body positioning mechanism 3 can adapt to different types of regular curved steel structures, such as cylindrical, truncated cone, and conical steel structures, and is also suitable for regular curved steel structures with different diameters.

[0025] In a preferred embodiment, the bottom of the top plate 4 is provided with a first annular groove 401 and a second annular groove 402, a first through-hole 403 is provided in the center of the top plate 4, and a second rotating seat 405 and a plurality of first rotating seats 404 are provided at the bottom of the top plate 4. With this structure, the first motor 704 is driven to rotate the screw 702, which in turn rotates the rotating frame 5, which in turn rotates the plurality of rotating rods 601, which in turn causes the plurality of clamping wheels 603 to abut against the object to be measured 2, thereby moving the measuring device 1 relative to the object to be measured 2 so that the central axis of the object to be measured 2 coincides with the central axis of the measuring device 1.

[0026] In a preferred embodiment, the rotating frame 5 includes a frame body 501, a plurality of arc-shaped grooves 502 are provided on the frame body 501, a rotating plate 503 is provided on one side of the frame body 501, and a ring body is provided at one end of the frame body 501, and the ring body abuts against the first ring groove 401; The clamping mechanism 6 includes a rotating sleeve 602, which is equipped with a rotating rod 601. A clamping wheel 603 is mounted on one end of the rotating rod 601. The other end of the rotating rod 601 is rotatably connected to the first rotating seat 404. With this structure, the first rotating seat 404 is rotatably connected to one end of the rotating rod 601, the rotating plate 503 is rotatably connected to the threaded seat 703, and the motor seat 701 is rotatably connected to the second rotating seat 405. Multiple rotating sleeves 602 are rotatably connected to the frame 501 and are located in the arcuate groove 502.

[0027] In a preferred embodiment, the driving device 7 includes a motor base 701 and a threaded base 703. The motor base 701 is rotatably connected to the second rotating base 405, and the threaded base 703 is rotatably connected to the rotating plate 503. The motor base 701 is provided with a first motor 704. The output shaft of the first motor 704 is provided with a screw 702, and the screw 702 is connected to the threaded base 703. With this structure, the motor base 701 is rotatably connected to the second rotating base 405, and the threaded base 703 is rotatably connected to the rotating plate 503. When the first motor 704 is driven, the motor base 701 rotates relative to the top plate 4, the threaded base 703 rotates relative to the rotating frame 5, and the rotating frame 5 simultaneously rotates relative to the top plate 4.

[0028] In a preferred embodiment, a gear ring 802 is provided at one end of the rotating frame 8, and a ring body 801 is provided at one end of the gear ring 802. The ring body 801 abuts against the second annular groove 402. A drive mechanism 9 is provided at the top of the top plate 4. The drive mechanism 9 includes a second motor 901. A gear 902 is provided at one end of the second motor 901, and the gear 902 meshes with the gear ring 802. With this structure, driving the second motor 901 rotates the gear 902, thereby rotating the rotating frame 8 relative to the top plate 4, and rotating the rotating plate 11 at the bottom of the rotating frame 8, so that the multiple second marking points 14 on the rotating plate 11 face the side of the laser projector 16, and the laser projector 16 can illuminate the second marking points 14.

[0029] In the preferred embodiment, the bottom of the rotating frame 8 is provided with a sliding rail 803, the sliding block 10 is in sliding contact with the sliding rail 803, one end of the sliding block 10 is provided with a support plate 1001, and one end of the rotating plate 11 is rotatably connected with the support plate 1001. Thus, the structure is that In the preferred embodiment, the rotating plate 11 is provided with abutting wheels 1101 at both ends, and the rotating plate 11 is provided with a magnet 1102 at one end. The abutting wheel 1101 close to the magnet 1102 is in abutting contact with the measured body 2, and the rotating plate 11 is provided with a plurality of second mark points 14. Thus, the structure is that the rotating plate 11 is provided with a magnet 1102 at one end, the magnet 1102 is a permanent magnet, and the magnet 1102 is arranged to abut the measured body 2 of the steel structure at one end of the rotating plate 11. The driving cylinder 12 is arranged to extend and retract the sliding block 10, so that the rotating plate 11 rotates relative to the surface of the measured body 2. When the two abutting wheels 1101 of the rotating plate 11 are in abutting contact with the measured body 2, the rotating plate 11 is parallel to the surface of the measured body 2, so that the connecting line of the plurality of second mark points 14 is parallel to the generatrix of the measured body 2.

[0030] In the preferred embodiment, the measured body 2 is provided with a laser projector 16, a photogrammetry camera and at least two building surfaces 15 outside. The building surface 15 is provided with a plurality of first mark points 13.

[0031] Embodiment 2: Further illustrated in combination with Embodiment 1: a measuring method of the verticality measuring device for regular curved surface steel structure, characterized in that: S1, the measuring device 1 is installed on the top of the measured body 2, and the measured body 2 is lifted by a lifting rod; S2, positioning the measured body 2: starting the first motor 704 of the driving device 7, clamping the measured body 2 by the plurality of clamping mechanisms 6, and starting the driving mechanism 9 and the driving cylinder 12 to make the two abutting wheels 1101 abut the measured body 2; S3, using the laser projector 16 to project a horizontal plane, and forming at least two horizontal lines by intersecting the horizontal plane with the building surface 15, and arranging the first mark points 13 on the horizontal lines; S4, taking a photo by the photogrammetry camera to extract all the first mark points 13, obtaining the relative coordinate information of all the first mark points 13, and fitting all the points into a horizontal plane; S5, fitting the second mark points 14 on the surface of the regular curved surface steel structure measured body 2 into a cylinder or a cone, and generating a central axis; S6. Use the photogrammetric data processing system to automatically calculate the angle between the central axis and the horizontal plane. The verticality of object 2 is then calculated as , where is the actual length or gauge length of object 2. Industrial photogrammetry is a measurement technique based on professional camera photography and computer image processing. It measures objects' geometric dimensions, spatial position, and posture. This technique is characterized by low labor intensity, rapid measurement speed, high measurement accuracy and automation, and low environmental requirements. The industrial photogrammetry system includes a camera, a laptop computer, a ruler, marker points, coding points and data processing software. The marker points are pasted on the surface of the object to be measured, and each marker point can obtain a position data; the coding points are arranged around the marker points, and the data points of multiple photos can be connected to form a spatial structure; the industrial photogrammetry camera is combined with a laser projector16, and the ruler controls the measurement accuracy; the camera is used to take pictures; the data processing system in the laptop computer is used to process data, and can fit ordinary markers into straight lines, planes, circles, spheres, cylinders, cones, and paraboloids, and can automatically calculate the distance between points, points and lines, and points and surfaces, as well as the angles between lines, lines and surfaces, and surfaces.

[0032] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A device for measuring the verticality of a regular curved steel structure, characterized by: The invention comprises a body to be measured (2), a measuring device (1) is provided on the top of the body to be measured (2), the measuring device (1) comprises a round body positioning mechanism (3), a rotating rotating frame (8) is provided at the bottom of the round body positioning mechanism (3), a sliding slider (10) is provided at the bottom of the rotating frame (8), a rotating rotating plate (11) is provided at one end of the slider (10), and one end of the rotating plate (11) is against the body to be measured (2).

2. The device for measuring the verticality of a regular curved steel structure according to claim 1, wherein: The round body positioning mechanism (3) includes a top plate (4), a rotating swivel frame (5) is provided on the top plate (4), a plurality of rotatably connected clamping mechanisms (6) are provided on the top plate (4), a rotatably connected driving device (7) is provided on the top plate (4), and a clamping wheel (603) is provided at one end of the clamping mechanism (6), and the clamping wheel (603) is against the object to be measured (2).

3. The device for measuring the verticality of a regular curved steel structure according to claim 2, wherein: A first annular groove (401) and a second annular groove (402) are provided at the bottom of the top plate (4), a first through hole (403) is provided in the middle of the top plate (4), and a second rotating seat (405) and a plurality of first rotating seats (404) are provided at the bottom of the top plate (4).

4. The device for measuring the verticality of a regular curved steel structure according to claim 2, wherein: The rotating frame (5) includes a frame body (501), a plurality of arc-shaped grooves (502) are provided on the frame body (501), a rotating plate (503) is provided on one side of the frame body (501), and a ring body is provided at one end of the frame body (501), and the ring body abuts against the first ring groove (401); The clamping mechanism (6) comprises a rotating sleeve (602), a rotating rod (601) is provided on the rotating sleeve (602), a clamping wheel (603) is mounted on one end of the rotating rod (601), and the other end of the rotating rod (601) is rotatably connected to the first rotating seat (404).

5. The device for measuring the verticality of a regular curved steel structure according to claim 2, wherein: The driving device (7) comprises a motor seat (701) and a threaded seat (703), wherein the motor seat (701) is rotatably connected to the second rotating seat (405), and the threaded seat (703) is rotatably connected to the rotating plate (503). A first motor (704) is provided on the motor seat (701), and an output shaft of the first motor (704) is provided with a screw rod (702), which is connected to the threaded seat (703).

6. The device for measuring the verticality of a regular curved steel structure according to claim 1, wherein: A gear ring (802) is provided at one end of the rotating frame (8), a ring body (801) is provided at one end of the gear ring (802), the ring body (801) abuts against the second ring groove (402), a driving mechanism (9) is provided at the top of the top plate (4), the driving mechanism (9) includes a second motor (901), a gear (902) is provided at one end of the second motor (901), and the gear (902) is meshed with the gear ring (802).

7. The device for measuring the verticality of a regular curved steel structure according to claim 1, wherein: A slide rail (803) is provided at the bottom of the rotating frame (8), and the slider (10) slides against the slide rail (803). A support plate (1001) is provided at one end of the slider (10), and one end of the rotating plate (11) is rotatably connected to the support plate (1001).

8. The device for measuring the verticality of a regular curved steel structure according to claim 7, wherein: Both ends of the rotating plate (11) are provided with abutting wheels (1101), one end of the rotating plate (11) is provided with a magnet (1102), the abutting wheel (1101) close to the magnet (1102) abuts against the object to be measured (2), and a plurality of second marking points (14) are provided on the rotating plate (11).

9. The device for measuring the verticality of a regular curved steel structure according to claim 1, wherein: A laser projector (16), a photogrammetry camera, and at least two building surfaces (15) are provided outside the object to be measured (2), and a plurality of first marking points (13) are provided on the building surfaces (15).

10. The measuring method of the device for measuring the verticality of a regular curved steel structure according to any one of claims 1 to 9, characterized in that: S1. The measuring device (1) is installed on the top of the object to be measured (2), and the object to be measured (2) is lifted by a suspension rod; S2, positioning the object to be measured (2): turning on the first motor (704) of the driving device (7), clamping the object to be measured (2) with the multiple clamping mechanisms (6), turning on the driving mechanism (9) and the driving cylinder (12), so that both the abutting wheels (1101) abut against the object to be measured (2); S3, using a laser projector (16) to project a horizontal plane, the horizontal plane intersecting with the building surface (15) to form at least two horizontal lines, and the first marking point (13) is arranged on the horizontal line; S4, taking photos with a photogrammetry camera to extract all first marker points (13), obtaining relative coordinate information of all first marker points (13), and fitting all points into a horizontal plane; S5, fitting the second marking point (14) on the surface of the regular curved steel structure to be measured (2) into a cylinder or a cone, and generating a central axis by fitting; S6. Use the photogrammetry data processing system to automatically calculate the angle between the central axis and the horizontal plane , then the verticality of the object to be measured (2) is ,in is the actual length or gauge length of the object to be measured (2).

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