CN110823183B - Bridge tower deviation measuring device based on laser technology - Google Patents
Bridge tower deviation measuring device based on laser technology Download PDFInfo
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- CN110823183B CN110823183B CN201911175217.5A CN201911175217A CN110823183B CN 110823183 B CN110823183 B CN 110823183B CN 201911175217 A CN201911175217 A CN 201911175217A CN 110823183 B CN110823183 B CN 110823183B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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Abstract
The invention discloses a bridge tower deviation measuring device based on a laser technology, which comprises a laser direction indicator, a lifting device and a laser signal receiving platform, wherein the laser direction indicator is arranged on a connecting plate through a suspension rod through a spherical revolute pair, a gyroscope inclination angle sensor is fixed on the laser direction indicator, the laser direction indicator is hinged with two telescopic rods of electric towing rods arranged in the mutually vertical direction, the fixed ends of the two electric push rods are hinged with the connecting plate, the connecting plate is fixed on a bearing member, the bearing member is in sliding connection with a climbing track 25 fixed on a bridge tower, the lifting device drives the bearing member to lift, the laser signal receiving platform is arranged on a bridge floor, and the laser signal receiving platform comprises grid coordinate paper, so that the deviation detection of different heights of the bridge tower is realized, and potential safety hazards possibly existing in the bridge tower are eliminated.
Description
Technical Field
The invention belongs to the technical field of bridge engineering measurement, and particularly relates to a bridge tower deviation measuring device based on a laser technology.
Background
With the development of bridge engineering in China, the cable-stayed bridge becomes one of the main bridge types of domestic large-span bridges. The offset value of the bridge tower 19 is an important deformation characteristic of the bridge structure, and the dynamic offset of the bridge tower 19 directly or indirectly reflects the deformation performance, stability and damage condition of the bridge structure. And comparing an actual deviation curve of the bridge tower deviation value along with the height change drawn according to the actual measurement result with a theoretical deviation curve, analyzing and evaluating related indexes related to the bridge tower deviation, and regarding points with abnormal deviation, the points can be used as the key points of next bridge tower 19 flaw detection, and the method is a scientific basis for designing and maintaining the cable-stayed bridge. At present, a common measurement method is total station measurement, and a total station is used for periodically monitoring points arranged on a cable tower, so that the method has low efficiency, complicated measurement process and low precision, and meanwhile, a deviation abnormal point at a certain position of a bridge tower cannot be found, and potential safety hazards cannot be found in time.
In view of this, the invention provides a bridge tower deviation measuring device based on a laser technology, which aims to effectively solve the problem of measuring the bridge tower deviation value in a cable-stayed bridge load test and improves the measuring method.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a device for measuring the deviation of a cable-stayed bridge tower, which is used for measuring the deviation conditions of different heights of the bridge tower by a lifting laser direction indicator and keeping the laser direction indicator in the vertical direction by adopting an electric push rod and a gyroscope inclination angle sensor.
The technical scheme adopted by the invention is as follows: a bridge tower deviation measuring device based on a laser technology comprises a laser direction indicator 1, a direction indicator fixing and protecting structure, a gyroscope orientation deviation correcting device, a lifting device and a laser signal receiving platform, wherein the direction indicator fixing and protecting structure comprises a suspension rod 2, a windshield 4 and a connecting plate 5, the lower end of the suspension rod 2 is used for fixing the laser direction indicator 1, the upper end of the suspension rod 2 and the connecting plate 5 form a spherical revolute pair to be connected, the windshield 4 is of a hollow structure, the upper end of the windshield 4 is fixed on the connecting plate 5, the windshield 4 is sleeved on the laser direction indicator 1 and is not in contact with the laser direction indicator 1, the gyroscope orientation deviation correcting device comprises a gyroscope inclination angle sensor 26 and an electric push rod 14, the gyroscope inclination angle sensor 26 is fixed on the laser direction indicator 1 and is used for measuring angle data of the laser direction indicator 1, the electric push rods 14 are two, the two electric push rods 14 are arranged in the mutually vertical direction, the fixed ends of the two electric push rods 14 are hinged on the inner wall of the windshield 4, and the telescopic rod end parts of the two electric push rods 14 are hinged with the suspension rod 2; the lifting device comprises a steel wire rope 23, a bearing member 24, a climbing rail 25 and a driving device 22, wherein the bearing member 24 is fixedly connected with the connecting plate 5, the climbing rail 25 is fixed on the bridge tower and is arranged in parallel with the abutment along the vertical direction, the bearing member 24 is connected with the climbing rail 25 in a sliding manner along the vertical direction, one end of the steel wire rope is fixed on the driving device 22, the other end of the steel wire rope 24 is fixedly provided with the bearing member 24 after the steel wire rope 23 upwards rounds a fixed pulley, and the fixed pulley is rotatably arranged at the upper end of the bridge tower 19; the laser signal receiving platform is arranged on the bridge floor and comprises grid coordinate paper 16, and light spots of the laser direction indicator 1 are projected on the grid coordinate paper 16.
The laser signal receiving platform comprises a tripod 20, a mounting platform 8 and an offset coordinate disc, wherein the mounting platform 8 is fixed at the upper end of the tripod 20, and a base lower disc 12 is fixed at the upper end of the mounting platform 8;
the deviation coordinate disc comprises grid coordinate paper 16, circular leveling bubbles 15, an upper base disc 11, a lower base disc 12 and a foot spiral 13, the grid coordinate paper 16 is fixed on the upper base disc 11, and the circular leveling bubbles 15 are arranged at the lower edge of the upper base disc 11 and used for leveling the upper base disc 11; the number of the foot screws 13 is three, the foot screws are uniformly distributed along the circumferential direction of the upper base plate 11, the upper ends of the foot screws 13 are rotatably connected with the spherical pair of the upper base plate 11, and the lower ends of the foot screws 13 are screwed with the threaded holes of the lower base plate 12 to achieve fine adjustment and leveling of the upper base plate 11.
The bridge tower deviation measuring device based on the laser technology further comprises a pointing instrument correction control system, wherein the pointing instrument correction control system is provided with a wireless control end and a wireless receiving end, the wireless control end and the wireless receiving end are in wireless communication, and the wireless receiving end is used for transmitting angle data of the gyroscope inclination angle sensor 26 to the wireless control end and receiving signals of the wireless control end; the wireless control end is used for receiving angle data of the gyroscope tilt angle sensor 26 and receiving control signals to control the movement of the two electric push rods; the gyroscope inclination angle sensor 26 and the two electric push rods 14 are connected with a pointing instrument correction control system through lines, and the pointing instrument correction control system and the two electric push rods 14 are powered by an external storage battery arranged on the windshield 4.
The driving device 22 comprises a motor, a speed reducer, a roller and a fixed pulley, the motor is fixed on the bridge floor, an output shaft of the motor is fixedly connected with the speed reducer, the roller is fixed by the output shaft of the speed reducer, and one end of a steel wire rope is fixed by the roller.
The ground color of the grid coordinate paper 16 is white and black grids, the center of the grid coordinate paper 16 is a coordinate origin 17, and scales 18 are marked on the grid coordinate paper 16 and used for displaying the position coordinates of the laser spots.
Compared with the prior art, the invention has the beneficial effects that:
1. the laser direction indicator is used for measuring the deviation of the bridge towers at different heights through the electric lifting device, the mutation points of the deviation of the bridge towers are found out, and potential safety hazards of the bridge towers are eliminated;
2. the inclination degree of the laser direction indicator is measured by adopting a laser inclination angle sensor fixed on the laser direction indicator, and the inclination angle of the laser direction indicator is corrected by adopting two electric push rods which are vertically arranged, so that the adjustment and correction of the vertical state of the laser direction indicator are realized;
3. and measuring the light spots of the laser direction indicator by adopting grid coordinate paper to realize the accurate measurement of the bridge tower deviation.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is an assembly diagram of a bridge tower deviation measuring device.
Fig. 2 is a schematic view of the laser pointer installation connection of the bridge tower deviation measuring device (without the windshield 4).
Fig. 3 is a schematic structural diagram of a laser direction indicator of a bridge tower deviation measuring device.
Fig. 4 is a schematic diagram of spherical bearing nesting of a bridge tower deviation measuring device connecting structure.
Fig. 5 is a schematic structural diagram of a laser signal receiving platform of the bridge tower deviation measuring device.
FIG. 6 is a schematic diagram of an offset coordinate disk of a laser signal receiving platform of the bridge tower offset measurement apparatus.
Fig. 7 is a detailed view of the deviation coordinate disk of the laser signal receiving platform of the bridge tower deviation measuring device.
Fig. 8 is a schematic structural diagram of a lifting device of the bridge tower deviation measuring device.
Figure 9 is a schematic diagram comparing the actual deviation curve of the tower deviation as a function of height with the theoretical deviation curve.
Description of reference numerals: 1. a laser pointer; 2. a suspension rod; 3. a spherical bearing; 4. a windshield; 5. a connecting plate; 6. a tripod mounting leg; 8. mounting a platform; 9. installing a bolt; 10. mounting a screw hole; 11. an upper base plate; 12. a base lower plate; 13. a foot spiral; 14. an electric push rod; 15. a circular level bubble; 16. grid coordinate paper; 17. a coordinate origin; 18. calibration; 19. a bridge tower; 20. a tripod; 21. a bridge deck; 22. a drive device; 23. a wire rope; 24. a load bearing member; 25. climbing a track; 26. a gyroscope tilt angle sensor; 27. a theoretical deviation curve; 28. an actual deflection curve; 29. bias mutation points.
Detailed Description
In order to make the objects, technical solutions and feasibility of the present invention more clear and detailed, the present invention is described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific examples described below are only for illustrating the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1 to 9, a bridge tower deviation measuring device based on laser technology comprises a laser direction indicator 1, a direction indicator fixing and protecting structure, a gyroscope directional deviation correcting device, a direction indicator correction control system, a lifting device and a laser signal receiving platform, the fixed protection structure of the direction indicator comprises a suspension rod 2, a spherical bearing 3, a windshield 4 and a connecting plate 5, the lower end of the suspension rod 2 is fixed with a laser direction indicator 1, the upper end is in a spherical structure and is nested in a spherical bearing 3 fixed on the connecting plate 5 to form a movable node, namely, the upper end of the suspension rod 2 forms a spherical revolute pair connection with the spherical bearing 3, the spherical bearing 3 is fixed on the connecting plate 5, the windshield 4 is of a hollow structure, the upper end of the windshield 4 is fixed on the connecting plate 5 and used for resisting the influence of wind and rain on the laser direction indicator 1, and the connecting plate 5 connects the upper structures of the device into a whole; the gyroscope directional rectification device comprises a gyroscope inclination angle sensor 26 and two electric push rods 14, the gyroscope inclination angle sensor 26 is fixed on a laser direction indicator 1 and used for measuring and outputting angle data of the laser direction indicator 1, the two electric push rods 14 are arranged perpendicularly to each other, the fixed ends of the two electric push rods 14 are hinged to the inner wall of a windshield 4, the end parts of telescopic rods of the two electric push rods 14 are hinged to a suspension rod 2, hinged shafts of the hinged parts of the electric push rods 14 and the windshield 4 and hinged shafts of the hinged parts of the telescopic rods of the electric push rods 14 and the suspension rod 2 are arranged along the horizontal direction, and the included angle between the laser direction indicator 1 and the vertical direction is corrected by adjusting the extending length of extending rods of the two electric push rods 14 fixed on the windshield 4, so that laser emitted by the laser direction indicator 1 is always kept downward; the pointing instrument correction control system is provided with a wireless control end and a wireless receiving end, the wireless control end and the wireless receiving end are in wireless communication, the wireless receiving end is used for transmitting angle data of the gyroscope tilt angle sensor 26 to the wireless control end and receiving signals of the wireless control end, and the wireless control end is used for receiving the angle data of the gyroscope tilt angle sensor 26 and receiving control signals to control the movement of the two electric push rods; the gyroscope inclination angle sensor 26 and the two electric push rods 14 are connected with a direction indicator correction control system through lines, the direction indicator correction control system and the two electric push rods are powered by an external storage battery arranged on the windshield 4, the lifting device comprises a steel wire rope 23, a bearing member 24, a climbing rail 25 and a driving device 22, the bearing member 24 is fixedly connected with the connecting plate 5 and used for bearing the laser direction indicator 1, the gyroscope directional deviation correcting device, a direction indicator fixing protection structure and the gyroscope directional deviation correcting device, the climbing rail 25 is fixed on the bridge tower and is arranged in parallel with the bridge tower along the up-down direction, the climbing rail 25 and the bridge tower 19 synchronously deviate and deform, the bearing member 24 and the climbing rail 25 are connected in a sliding manner along the up-down direction, the driving device 22 comprises a motor, a speed reducer, a roller and a fixed pulley, and the motor is fixed on the bridge floor, an output shaft of the motor is fixedly connected with a speed reducer, the output shaft of the speed reducer fixes a roller, the roller fixes one end of a steel wire rope, the steel wire rope winds upwards around a fixed pulley, the other end of the steel wire rope fixes a bearing component 24, and the fixed pulley is rotatably arranged at the upper end of a bridge tower 19;
the laser signal receiving platform comprises a tripod 20, a mounting platform 8, a mounting bolt 9 and a deviation coordinate disc, wherein the tripod 20 is a level gauge support used in surveying and mapping engineering; tripod 20 upper end fixed mounting platform 8, base lower wall 12 middle part is provided with the installation screw 10 that runs through from top to bottom, and mounting bolt 9 passes installation screw 10 fixed mounting platform 8, 8 upper ends fixed off normal coordinate dishes of mounting platform.
The deviation coordinate disc comprises grid coordinate paper 16, circular level bubbles 15, an upper base disc 11, a lower base disc 12 and a foot spiral 13, the bottom color of the grid coordinate paper 16 is white and black grids, the center of the grid coordinate paper 16 is a coordinate origin 17, and scales 18 are marked on the coordinate paper 16 and used for displaying the position coordinates of the laser spots; the circular leveling bubble 15 is arranged at the lower edge of the upper base plate 11 and used for leveling the upper base plate 11; the number of the foot screws 13 is three, the foot screws are uniformly distributed along the circumferential direction of the upper base plate 11, the upper ends of the foot screws 13 are rotatably connected with the spherical pair of the upper base plate 11, the lower ends of the foot screws 13 are screwed with the threaded holes of the lower base plate 12, and the upper base plate 11 is finely adjusted and leveled by rotating the foot screws 13.
Before loading of a load test of a cable-stayed bridge, a motor of a driving device 22 rotates to drive a roller to rotate, a steel wire rope is wound, the steel wire rope pulls a bearing member 24, the bearing member 24 ascends along a climbing track 25, a connecting plate 5 ascends to an initial height, for example, 2m, a laser direction instrument 1 is started, telescopic links of two electric push rods are controlled to move, the laser direction instrument 1 is arranged along the vertical direction, laser is projected to a certain point on a bridge floor 21 and is used as an origin point of displacement value measurement of a bridge tower, a laser signal receiving platform is moved, a coordinate origin 17 of grid coordinate paper 16 is coincided with a laser projection light spot of the laser direction instrument 1, the instrument is leveled by using a circular leveling bubble 15, a foot spiral 13 is adjusted, an upper disc 11 of a base is adjusted to be in a horizontal state, if the coordinate origin point 17 is not coincided with the laser projection light spot of the laser direction instrument 1 at the moment, the grid coordinate paper 16 needs to be moved, the origin of coordinates 17 is made to coincide with the laser projection spot of the laser pointer 1, and the grid coordinate paper 16 is fixed on the base upper plate 11.
Load loading, 19 tails of the bridge tower are generated under the action of unbalanced load of the stay cable by the bridge tower 19, X, Y horizontal deviation in the direction is generated on grid coordinate paper 16, the horizontal deviation passes through the traction steel wire rope again at the moment, the connecting plate 5 is sequentially adjusted to different heights, the laser direction indicator 1 is started to project laser beams, if the gyroscope inclination angle sensor 26 detects that the laser direction indicator 1 is not in a vertical state in the period, the telescopic rod motion of the two electric push rods 14 is controlled, the laser direction indicator 1 is arranged along the vertical direction, laser spots appear on the grid coordinate paper 16 by the laser direction indicator 1, the coordinate value of the spot position is read from the coordinate paper and is recorded as the bridge tower deviation value at the height position until the deviation of the top end of the bridge tower is measured. And drawing a curve graph of the deviation value of the bridge tower 19 along with the height change under the load action according to the measurement data, quantitatively analyzing the deformation condition of the bridge tower 19 according to the curve graph of the deviation value of the bridge tower along with the height change, and taking the deviation abnormal points and the mutation points as detection objects of the next step of flaw detection of the bridge tower 19.
Claims (4)
1. The utility model provides a bridge tower off normal measuring device based on laser technology which characterized in that: the device comprises a laser direction indicator (1), a direction indicator fixed protection structure, a gyroscope directional deviation correction device, a lifting device and a laser signal receiving platform, wherein the direction indicator fixed protection structure comprises a suspension rod (2), a windshield (4) and a connecting plate (5), the laser direction indicator (1) is fixed at the lower end of the suspension rod (2), the upper end of the suspension rod (2) is connected with the connecting plate (5) to form a spherical revolute pair, the windshield (4) is of a hollow structure, the upper end of the windshield (4) is fixed on the connecting plate (5), the windshield (4) is sleeved on the laser direction indicator (1) and is not in contact with the laser direction indicator (1), the gyroscope directional deviation correction device comprises a gyroscope inclination sensor (26) and an electric push rod (14), the gyroscope inclination sensor (26) is fixed on the laser direction indicator (1) and is used for measuring angle data of the laser direction indicator (1), the two electric push rods (14) are arranged in a mutually vertical direction, the fixed ends of the two electric push rods (14) are hinged on the inner wall of the windshield (4), and the end parts of the telescopic rods of the two electric push rods (14) are hinged with the suspension rods (2); the lifting device comprises a steel wire rope (23), a bearing component (24), a climbing rail (25) and a driving device (22), the bearing component (24) is fixedly connected with a connecting plate (5), the climbing rail (25) is fixed on a bridge tower and is arranged in parallel with the bridge tower along the vertical direction, the bearing component (24) is connected with the climbing rail (25) in a sliding mode along the vertical direction, one end of the steel wire rope is fixed on the driving device (22), the steel wire rope (23) winds around a fixed pulley upwards, the other end of the steel wire rope fixes the bearing component (24), and the fixed pulley is rotatably installed at the upper end of the bridge tower (19); the laser signal receiving platform is arranged on the bridge floor and comprises grid coordinate paper (16) used for enabling light spots of the laser direction indicator (1) to be projected on the grid coordinate paper (16);
the laser signal receiving platform comprises a tripod (20), a mounting platform (8) and a deviation coordinate disc, wherein the mounting platform (8) is fixed at the upper end of the tripod (20), and a base lower disc (12) is fixed at the upper end of the mounting platform (8);
the deviation coordinate disc comprises grid coordinate paper (16), circular level bubbles (15), an upper base disc (11), a lower base disc (12) and a foot spiral (13), the grid coordinate paper (16) is fixed on the upper base disc (11), and the circular level bubbles (15) are arranged at the lower edge of the upper base disc (11) and used for leveling the upper base disc (11); the number of the foot screws (13) is three, the foot screws are uniformly distributed along the circumferential direction of the upper base plate (11), the upper ends of the foot screws (13) are rotatably connected with the spherical pair of the upper base plate (11), and the lower ends of the foot screws (13) are screwed with the threaded holes of the lower base plate (12) to realize fine adjustment and leveling of the upper base plate (11).
2. The laser technology based bridge tower offset measurement device of claim 1, wherein: the gyroscope inclination angle correction system is characterized by further comprising a director correction control system, wherein the director correction control system is provided with a wireless control end and a wireless receiving end, the wireless control end and the wireless receiving end are in wireless communication, and the wireless receiving end is used for transmitting angle data of the gyroscope inclination angle sensor (26) to the wireless control end and receiving signals of the wireless control end; the wireless control end is used for receiving angle data of the gyroscope inclination angle sensor (26) and receiving control signals to control the movement of the two electric push rods; the gyroscope inclination angle sensor (26) and the two electric push rods (14) are connected with the pointing instrument correction control system through lines, and the pointing instrument correction control system and the two electric push rods (14) are powered by an external storage battery arranged on the windshield (4).
3. The laser technology based bridge tower offset measurement device according to claim 1 or 2, wherein: the driving device (22) comprises a motor, a speed reducer, a roller and a fixed pulley, wherein the motor is fixed on the bridge floor, an output shaft of the motor is fixedly connected with the speed reducer, the roller is fixed by the output shaft of the speed reducer, and one end of a steel wire rope is fixed by the roller.
4. The laser technology based bridge tower offset measurement device of claim 3, wherein: the ground color of grid coordinate paper (16) is white, black grid, the center of grid coordinate paper (16) is origin of coordinates (17), mark scale (18) on coordinate paper (16) for show laser facula position coordinate.
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| CN201911175217.5A CN110823183B (en) | 2019-11-26 | 2019-11-26 | Bridge tower deviation measuring device based on laser technology |
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| CN201911175217.5A CN110823183B (en) | 2019-11-26 | 2019-11-26 | Bridge tower deviation measuring device based on laser technology |
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| CN110823183B true CN110823183B (en) | 2021-09-03 |
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| CN113340273B (en) * | 2021-04-28 | 2022-07-22 | 深圳市森思德克科技有限公司 | Electromagnetic induction type contactless inclination sensor |
| CN114353768B (en) * | 2021-12-23 | 2024-01-02 | 上海先行建设监理有限公司 | Device and method for monitoring main girder construction of low-tower cable-stayed bridge |
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| JP2000227333A (en) * | 1999-02-04 | 2000-08-15 | Ishikawajima Harima Heavy Ind Co Ltd | Shape measuring instrument for bridge |
| CN106840115A (en) * | 2016-11-23 | 2017-06-13 | 广西交通科学研究院 | Electromagnetic levitation type bridge main tower tower top deviation measurement device and its measuring method |
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