Double-laser blade edge measuring device

Abstract

The invention provides a double-laser blade edge measuring device, and the device comprises a measuring table which is provided with a pedestal below; the turnover mechanism, the steering mechanism, the measuring mechanism, the position adjusting mechanism and the posture adjusting mechanism are respectively used for adjusting the posture of the measuring mechanism relative to the blade. According to the invention, the multi-angle and multi-attitude adjustment of the to-be-measured blade on the measuring table is realized through the cooperation of the turnover mechanism, the steering mechanism and the position adjusting mechanism, so that full coverage can be realized when a complex molded surface is faced; wherein the posture adjusting mechanisms are arranged corresponding to the measuring mechanisms respectively so as to adjust the postures of the two measuring mechanisms relative to the blade respectively, on the basis that the blade postures are preliminarily adjusted through the overturning mechanism, the steering mechanism and the position adjusting mechanism, the postures of the measuring mechanisms relative to the blade are further adjusted, and self-adaptive adjustment is achieved; therefore, various complex molded surfaces can be measured easily.

Description

Technical Field

[0001] The present invention relates to the technical field of laser measurement, and particularly relates to a dual-laser blade edge measurement device. Background Art

[0002] A dual-laser blade edge measurement device is a device that uses laser technology to perform high-precision measurement on the blade edge. By emitting two laser beams from a laser emitter, which are respectively irradiated on different parts of the blade, distance data is obtained using the reflection characteristics of the laser beam and the object surface. Measurement is carried out through the intersection points of the laser plane formed by the two laser beams and the blade edge, so as to obtain the precise position and shape of the blade edge; however, traditional laser emitters are difficult to cover complex surfaces. In addition, blades are mostly spatially distorted curved surfaces and need to be measured from multiple angles, and it is impossible to form a good laser plane, thus affecting the measurement of blades with complex surfaces. Therefore, a dual-laser blade edge measurement device is invented to improve the above problems. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the existing blade edge measurement device cannot cope with the measurement of blades with complex surfaces, and thus provide a dual-laser blade edge measurement device.

[0004] To solve the above problems, the present invention provides a dual-laser blade edge measurement device, which includes: A measurement table, with a base provided below the measurement table; A flipping mechanism and a steering mechanism, which are arranged between the base and the measurement table to respectively realize the multi-directional attitude and position adjustment of the measurement table; A measurement mechanism. When the measurement table is placed horizontally, two are vertically arranged along the radial and axial directions of the measurement table respectively to measure the blade on the measurement table; A position adjustment mechanism, which is arranged directly above the measurement table, and the position adjustment mechanism is used to realize the position adjustment of the measurement mechanism arranged along the axial direction of the measurement table relative to the radial direction of the measurement table; An attitude adjustment mechanism, with one arranged near each measurement mechanism respectively, and the attitude adjustment mechanism is respectively used to adjust the attitude of the measurement mechanism relative to the blade; A control device, which is used to control the realization of the multi-directional attitude and position adjustment of the measurement table, control the measurement mechanism to measure the blade, control the position adjustment of the position adjustment mechanism relative to the radial direction of the measurement table, and control the attitude adjustment mechanism to respectively adjust the attitude of each measurement mechanism relative to the blade.

[0005] Preferably, the flipping mechanism includes: a pair of side plates respectively vertically arranged on both sides of the base. Rotation holes are respectively arranged at the tops of the side plates, and rotation blocks are respectively arranged in the rotation holes. The rotation blocks are rotatably connected to the rotation holes. An equipment box is arranged near one of the side plates. A first motor is arranged in the equipment box, and the output shaft of the first motor rotatably penetrates through the equipment box and is connected to the adjacent rotation block.

[0006] Preferably, the steering mechanism includes: a rotating seat arranged between the pair of rotation blocks. A second motor is arranged in the rotating seat, and the second motor is arranged at the center of the bottom of the rotating seat. A rotating part is arranged at the top of the rotating seat. A rotating ring adapted to the rotating part is arranged at the bottom of the measuring table, and the measuring table is rotatably connected to the rotating part through the rotating ring; the output shaft of the second motor rotatably penetrates through the rotating part and is connected to the center of the bottom of the measuring table.

[0007] Preferably, the position adjusting mechanism includes: a pair of L-shaped bars and a cross beam. The horizontal ends of the pair of L-shaped bars are respectively connected to both ends of the base, and the vertical ends of the pair of L-shaped bars respectively extend upward and are respectively connected to both ends of the cross beam; A sliding seat adapted to the cross beam is arranged on the cross beam. A pair of slide rails are arranged along the length direction of the cross beam. Sliders are respectively arranged on the pair of slide rails. The sliders are slidably connected to the slide rails and the sliders are respectively connected to the sliding seat; A first screw rod is also arranged along the length direction of the cross beam. A pair of support seats are respectively arranged at both ends of the first screw rod. The first screw rod is respectively rotatably connected to the support seats. A first sliding block is arranged on the first screw rod. The first sliding block is screwed to the first screw rod. The first sliding block is connected to the adjacent side of the sliding seat. A third motor is arranged on the cross beam near one of the support seats, and the output shaft of the third motor is connected to the adjacent end of the first screw rod.

[0008] Preferably, a sliding groove is arranged along the height direction of the sliding seat. Sliding grooves are respectively arranged at both side edges of the sliding groove. A first mounting plate is arranged between the pair of sliding grooves. Both sides of the first mounting plate slide in the sliding grooves in the height direction of the sliding seat relative to the sliding seat; A second screw rod is arranged along the height direction of the sliding seat in the sliding groove. Both ends of the second screw rod are respectively rotatably connected to both end walls of the sliding groove. A second sliding block is arranged on the second screw rod. The second sliding block is screwed to the second screw rod. The second sliding block is connected to the adjacent side of the first mounting plate. A fourth motor is arranged at the top of the sliding seat, and the output shaft of the fourth motor rotatably penetrates through the top of the sliding seat and is connected to the adjacent end of the second screw rod.

[0009] Preferably, the measuring mechanism includes: a laser emitter. The laser emitter arranged along the axial direction of the measuring table is arranged on the first mounting plate, and the other laser emitter is arranged on the second mounting plate. The second mounting plate is arranged on one of the L-shaped bars along the radial direction of the measuring table. An attitude adjusting mechanism is arranged between the first mounting plate and the second mounting plate and the arranged laser emitters respectively.

[0010] Preferably, the attitude adjusting mechanism includes: a first vertical plate, a fixing block and a mounting seat. One end of the first vertical plate is vertically arranged at one end of the first mounting plate and the second mounting plate respectively. A first electric cylinder is arranged at the other end of the first vertical plate. The fixed end of the first electric cylinder is connected to the first vertical plate, and the telescopic end of the first electric cylinder extends towards the other ends of the first mounting plate and the second mounting plate respectively. A through hole is arranged at the center of the fixing block. An extension groove is arranged at the edge of one end of the through hole far away from the first vertical plate. The telescopic end of the first electric cylinder slidably penetrates through the through hole and extends into the extension groove. A pair of first rotating bars are respectively connected to the telescopic end of the first electric cylinder. One ends of the pair of first rotating bars are respectively rotatably connected to the telescopic end of the first electric cylinder. The other ends of the pair of first rotating bars are respectively rotatably connected to a pair of second rotating bars. One ends of the pair of second rotating bars far away from the first rotating bars are respectively connected to one end of the mounting seat close to the fixing block. Rotating parts are respectively arranged on both sides of the fixing block. Connecting bars are respectively rotatably connected to the rotating parts. One ends of the connecting bars are respectively rotatably connected to the rotating parts, and the other ends of the connecting bars are respectively connected to the mounting seat. The laser emitter is arranged at one end of the mounting seat far away from the fixing block.

[0011] Preferably, second electric cylinders are respectively arranged at one of the rotating parts of the first mounting plate and the second mounting plate close to the fixing block. The fixed ends of the second electric cylinders are respectively vertically arranged on the first mounting plate and the second mounting plate, and the telescopic ends of the second electric cylinders are rotatably connected to the rotating parts of the fixing block.

[0012] Preferably, it further includes: a clamping mechanism disposed on the measuring table for clamping the blade. The clamping mechanism includes: a positioning plate vertically disposed on one side edge of the measuring table. A positioning hole is provided at the center of the positioning plate, and a fifth motor is disposed in the positioning hole. The output shaft of the fifth motor extends towards the center of the measuring table. A gear is provided on the output shaft of the fifth motor. A rack is respectively provided at the top and bottom of the gear. One end of a pair of the racks meshes with the gear respectively, and the other ends of the pair of racks extend towards the two ends of the positioning plate respectively; On the positioning plate on the same side as the rack, two pairs of sliding rods are provided, and the two pairs of sliding rods are located on both sides of the gear. A support is respectively provided at both ends of the sliding rod, and the support is connected to the positioning plate. A sliding block is respectively provided on the sliding rod. A sliding bar is provided between the sliding blocks on each pair of sliding rods. A clamping bar is provided on each sliding bar. One end of the clamping bar is vertically connected to the sliding bar, and the other end extends away from the positioning plate and is movably connected to a clamping plate; One end of the rack extending towards the two ends of the positioning plate is respectively vertically connected to a clamping bar.

[0013] Preferably, a clamping surface is provided on the side where the clamping plates are close to each other. An arc surface is provided on the side of the clamping bar close to the clamping plate. An installation part is provided at the end of the clamping plate away from each other. One end of the clamping bar and one end of the installation part are rotatably connected. A rotating shaft is provided at the other end of the installation part, and the rotating shaft is rotatably connected to the installation part. A torsion spring is sleeved on the rotating shaft, and both ends of the torsion spring respectively abut against the clamping plate and the arc surface.

[0014] A double-laser blade edge measuring device provided by the present invention has the following beneficial effects: 1. The present invention realizes the adjustment of multiple angles and postures of the blade to be measured on the measuring table through the joint cooperation of the flipping mechanism, the steering mechanism and the position adjustment mechanism, so that full coverage can be achieved when facing complex surfaces. Among them, a posture adjustment mechanism is provided for each measuring mechanism respectively to adjust the posture of the two measuring mechanisms relative to the blade respectively. On the basis of the preliminary adjustment of the blade posture by the flipping mechanism, the steering mechanism and the position adjustment mechanism, the posture of the measuring mechanism relative to the blade is further adjusted to realize adaptive adjustment, so as to easily cope with the measurement of various complex surfaces; 2. The present invention also drives the rotating block to rotate relative to the rotating hole through the first motor, so that the rotating seat rotates with the center of the rotating hole as the axis, thereby realizing the horizontal or vertical position of the measuring platform, and switching the vertical or horizontal mode of the measuring platform; when the second motor is driven, the measuring platform rotates with the output shaft of the second motor as the axis, and the rotating ring of the measuring platform rotates on the rotating part of the rotating seat, so as to realize the relative 360° horizontal rotation of the measuring platform. By switching between the vertical and horizontal modes, the blade profile can be fully covered, and the clamping error caused by manual flipping can be reduced compared with the traditional single-posture measurement; 3. The present invention also slides the two sides of the first mounting plate connected by the second sliding block in the sliding groove, so that the first mounting plate slides in the height direction relative to the sliding seat, thereby adjusting the height direction of the measuring mechanism installed on the first mounting plate relative to the measuring platform, and when facing a variety of complex surfaces, more positions can be measured; 4. The present invention can also reduce the accuracy requirement for the subsequent clamping mechanism to clamp the blade through the posture adjustment mechanism. When the clamping mechanism cannot adaptively clamp and fix the blade due to the edge shape of the blade, the laser transmitter posture is actively adjusted to compensate for the influence of the clamping error on the measurement result. 5. The present invention also transmits power to the rack through the gear, so that the clamping plate connected to the clamping bar can center and clamp the blade placed on the measuring table, which can realize the automatic clamping of the blade, and is compatible with blades of various specifications, stabilizes the measurement reference, reduces system errors, avoids repeated positioning of the blade on the turntable affecting the accuracy, and provides a stable and reliable physical reference for subsequent laser measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the general assembly of the present invention; Figure 2 It is a schematic diagram of the installation of the slide rail structure of the present invention; Figure 3 It is a schematic diagram of the measuring table of the present invention in a standing state; Figure 4 This is a schematic diagram of the installation of the first electric cylinder structure of the present invention; Figure 5 It is a schematic diagram of the installation of the second rotating bar structure of the present invention; Figure 6 It is a schematic diagram of the installation of the first rotating bar structure of the present invention; Figure 7 It is a schematic diagram of the installation of the gear structure of the present invention; Figure 8 It is a schematic diagram of the installation of the torsion spring structure of the present invention.

[0016] The reference numerals are: 1. Measuring table; 2. Base; 3. Blade; 4. Side plate; 5. Rotation hole; 6. Rotation block; 7. Equipment box; 8. Rotation seat; 9. L-shaped bar; 10. Cross beam; 11. Sliding seat; 12. Slide rail; 13. Slide block; 14. First screw; 15. Support seat; 16. Third motor; 17. Gliding groove; 18. Sliding groove; 19. First mounting plate; 20. Second screw; 21. Fourth motor; 22. Laser emitter; 23. Second mounting plate; 24. First vertical plate; 25. Fixed block; 26. Mounting seat; 27. First electric cylinder; 28. Through hole; 29. Extension groove; 30. First rotating bar; 31. Second rotating bar; 32. Rotating part; 33. Second electric cylinder; 34. Positioning plate; 35. Fifth motor; 36. Gear; 37. Rack; 38. Sliding rod; 39. Support; 40. Gliding block; 41. Gliding bar; 42. Clamping bar; 43. Clamping plate; 44. Clamping surface; 45. Arc surface; 46. Mounting part; 47. Rotating shaft; 48. Torsion spring; 49. Connecting bar. Detailed implementation manner

[0017] As Figure 1-8 shown, the present invention provides a double-laser blade edge measuring device, which includes: A measuring table 1, and a base 2 is arranged below the measuring table 1; A flipping mechanism and a steering mechanism are arranged between the base 2 and the measuring table 1 to respectively realize multi-directional attitude and position adjustment of the measuring table 1; A measuring mechanism. When the measuring table 1 is placed horizontally, two measuring mechanisms are respectively vertically arranged along the radial and axial directions of the measuring table 1 to measure the blade 3 on the measuring table 1; A position adjustment mechanism is arranged directly above the measuring table 1, and the position adjustment mechanism is used to realize the position adjustment of the measuring mechanism arranged along the axial direction of the measuring table 1 relative to the radial direction of the measuring table 1; An attitude adjustment mechanism is arranged near each measuring mechanism, and the attitude adjustment mechanism is respectively used to adjust the attitude of the measuring mechanism relative to the blade 3; A control device is used to control the multi-directional attitude and position adjustment of the measuring table 1, control the measuring mechanism to measure the blade 3, control the position adjustment of the position adjustment mechanism relative to the radial direction of the measuring table 1, and control the attitude adjustment mechanism to respectively adjust the attitude of each measuring mechanism relative to the blade 3. As Figure 1-8As shown, for the double-laser blade 3 edge measurement device, its measurement table 1 is used to place the blade 3 to be measured and provide the reference plane required for measurement for the entire device; an angle encoder is provided on the measurement table, which is commercially available. The angle encoder is connected to a processor, and the processor is connected to the control device. The angle encoding data of the measurement table can be obtained through the angle encoder. The base 2 plays a supporting role for the entire device. The base 2 is made of low-thermal-expansion Huanggang granite to avoid the relative position offset between the laser emitter 22 and the measurement table 1 caused by the thermal expansion and contraction of the base 2, and ensure the stability of the spatial coordinate reference of the laser emitter 22; among them, the flipping mechanism is used for flipping the measurement table 1 to achieve the horizontal or vertical state of the measurement table 1, and switching between the vertical or horizontal modes of the measurement table 1 to achieve full-attitude coverage of the blade 3 to be measured and eliminate the measurement blind area; among them, the steering mechanism is used to achieve the 360° horizontal rotation of the measurement table 1 and adjust according to the position of the blade 3 to be measured to achieve full coverage of the blade 3 to be measured; among them, the positions of the measurement mechanisms are set perpendicular to each other along the radial and axial directions of the measurement table 1 in the horizontal mode of the measurement table 1, and the measurement ends of the measurement mechanisms face the measurement table 1 to achieve full-coverage data collection of the upper and lower edges, front and rear edges, and complex twisted surfaces of the blade 3 to be measured, and generate the three-dimensional point cloud corresponding to the blade 3 to be measured; among them, the position adjustment mechanism is installed directly above the measurement table 1, and the position adjustment mechanism adjusts the measurement mechanism installed in the axial direction of the measurement table 1 along the radial direction of the measurement table 1 for data collection in the length direction of the blade 3 during the measurement process; among them, the flipping mechanism, the steering mechanism, and the position adjustment mechanism cooperate together to achieve multi-angle and multi-attitude adjustment of the blade 3 to be measured on the measurement table 1, so that full coverage can be achieved when facing complex surfaces; among them, an attitude adjustment mechanism is provided for each measurement mechanism to respectively adjust the attitude of the two measurement mechanisms relative to the blade 3. On the basis of the preliminary adjustment of the attitude of the blade 3 by the flipping mechanism, the steering mechanism, and the position adjustment mechanism, the attitude of the measurement mechanism relative to the blade 3 is further adjusted to achieve adaptive adjustment to easily handle the measurement of various complex surfaces. Among them, the control device is used to control the multi-directional attitude and position adjustment of the measurement table 1, control the measurement mechanism to measure the blade 3, control the position adjustment of the position adjustment mechanism relative to the radial direction of the measurement table 1, and control the attitude adjustment mechanism to respectively adjust the attitude of each measurement mechanism relative to the blade 3.

[0018] In some embodiments, the flipping mechanism includes: a pair of side plates 4, which are respectively vertically arranged on both sides of the base 2. Rotation holes 5 are respectively provided at the tops of the side plates 4. Rotation blocks 6 are respectively arranged in the rotation holes 5. The rotation blocks 6 are rotatably connected to the rotation holes 5. An equipment box 7 is arranged near one of the side plates 4. A first motor is arranged in the equipment box 7. The output shaft of the first motor rotatably penetrates the equipment box 7 and is connected to the adjacent rotation block 6. AsFigure 1-8 As shown, the side plates 4 are perpendicular to the two end portions of the base 2. The rotating blocks 6 of the two side plates 4 are rotatably connected through the rotating holes 5. The first motor is connected to the control device, and the state and parameters of the first motor are controlled through the control device. The first motor is commercially available. The connection between the output shaft of the first motor and the rotating block 6 can be achieved by connecting a rotating rod and the output shaft of the first motor through a coupling, and then connecting the end of the rotating rod close to the rotating block 6 to the rotating block 6. In this way, driven by the first motor, one of the connected rotating blocks 6 is driven to rotate to achieve transmission.

[0019] In some embodiments, the steering mechanism includes: a rotating seat 8, the rotating seat 8 is arranged between a pair of the rotating blocks 6, a second motor is arranged inside the rotating seat 8, the second motor is arranged at the center of the bottom of the rotating seat 8, a rotating part is arranged at the top of the rotating seat 8, and a rotating ring adapted to the rotating part is arranged at the bottom of the measuring table 1. The measuring table 1 is rotatably connected to the rotating part through the rotating ring; the output shaft of the second motor rotatably penetrates through the rotating part and is connected to the center of the bottom of the measuring table 1. As Figure 1-8 shown, the two side ends of the rotating seat 8 are connected to two rotating blocks 6. Since one of the rotating blocks 6 is connected to the output shaft of the first motor, the rotating block 6 is driven by the first motor to rotate relative to the rotating hole 5, so that the rotating seat 8 rotates around the center of the rotating hole 5, and further the measuring table 1 is made horizontal or upright, realizing the switching between the vertical and horizontal modes of the measuring table 1; and the second motor is also commercially available. The second motor is connected to the control device, and the state and parameters of the second motor are controlled through the control device. The connection between the output shaft of the second motor and the measuring table 1 can also be achieved by connecting a rotating rod and the output shaft of the second motor through a coupling, and then connecting the end of the rotating rod close to the measuring table 1 to the center of the bottom of the measuring table 1. When the second motor is driven, the measuring table 1 rotates around the output shaft of the second motor, so that the rotating ring of the measuring table 1 rotates on the rotating part of the rotating seat 8, thereby realizing the 360° horizontal rotation of the measuring table 1 relative to the measuring table 1, and corresponding adjustments are made according to the actual situation of the blade to be measured. By switching between the vertical and horizontal modes, the entire blade surface can be covered, reducing the clamping error caused by manual flipping compared with traditional single-posture measurement.

[0020] In some embodiments, the position adjusting mechanism includes: a pair of L-shaped bars 9 and a cross beam 10. The horizontal ends of the pair of L-shaped bars 9 are respectively connected to the two ends of the base 2, and the vertical ends of the pair of L-shaped bars 9 respectively extend upward and are respectively connected to the two ends of the cross beam 10; A sliding seat 11 adapted to the cross beam 10 is provided on the cross beam 10. A pair of slide rails 12 are arranged along the length direction of the cross beam 10. Sliders 13 are respectively arranged on the pair of slide rails 12. The sliders 13 are slidably connected to the slide rails 12 and the sliders 13 are respectively connected to the sliding seat 11; A first screw rod 14 is further arranged along the length direction of the cross beam 10. A pair of support seats 15 are respectively arranged at both ends of the first screw rod 14. The first screw rod 14 is respectively rotatably connected to the support seats 15. A first sliding block is arranged on the first screw rod 14. The first sliding block is screwed to the first screw rod 14. The first sliding block is connected to the side of the sliding seat 11 close to it. A third motor 16 is arranged on the cross beam 10 close to one of the support seats 15. The output shaft of the third motor 16 is connected to the end of the first screw rod 14 close to it. As Figure 1-8 shown, a pair of L-shaped bars 9 and the cross beam 10 integrally form a vertical gantry to support the overall position adjusting mechanism. Among them, the third motor 16 is commercially available. The third motor 16 is connected to a control device. The state and parameters of the third motor 16 are controlled by the control device. The connection between the output shaft of the third motor 16 and the first screw rod 14 can be through a coupling. Driven by the third motor 16, the first screw rod 14 is driven. The first sliding block is screwed relative to the first screw rod 14, so that the sliding seat 11 connected by the first sliding block changes its position. The two sliders 13 connected to the sliding seat 11 slide on the slide rails 12 and provide a guiding function, so as to realize the adjustment of the measuring mechanism installed in the axial direction of the measuring table 1 along the radial direction of the measuring table 1, and be used for data collection in the length direction of the blade 3 during the measurement process.

[0021] In some embodiments, a sliding groove 17 is arranged along the height direction of the sliding seat 11. Sliding grooves 18 are respectively arranged at both side edges of the sliding groove 17. A first mounting plate 19 is arranged between the pair of sliding grooves 18. Both sides of the first mounting plate 19 slide relative to the height direction of the sliding seat 11 in the sliding grooves 18; A second screw rod 20 is arranged along the height direction of the sliding seat 11 in the sliding groove 17. Both ends of the second screw rod 20 are respectively rotatably connected to the end walls of both ends of the sliding groove 17. A second sliding block is arranged on the second screw rod 20. The second sliding block is screwed to the second screw rod 20. The second sliding block is connected to the side of the first mounting plate 19 close to it. A fourth motor 21 is arranged at the top of the sliding seat 11. The output shaft of the fourth motor 21 rotatably penetrates through the top of the sliding seat 11 and is connected to the end of the second screw rod 20 close to it. As Figure 1-8As shown, based on the adjustment of the measuring mechanism installed in the axial direction of the measuring table 1 along the radial direction of the measuring table 1, further adjustment is carried out along the height direction of the sliding seat 11. Among them, the fourth motor 21 is commercially available. The fourth motor 21 is connected to the control device, and the state and parameters of the fourth motor 21 are controlled through the control device. The connection between the fourth motor 21 and the second screw 20 can be through a coupling. The second slider is screwed to the second screw 20, so that when the fourth motor 21 drives the second screw 20, both sides of the first mounting plate 19 connected to the second slider slide in the sliding groove 18, so that the first mounting plate 19 slides in the height direction relative to the sliding seat 11, thereby adjusting the height direction of the measuring mechanism installed on the first mounting plate 19 relative to the measuring table 1. When facing various complex profiles, measurements at more positions can be achieved.

[0022] In some embodiments, the measuring mechanism includes: a laser emitter 22. The laser emitter 22 arranged along the axial direction of the measuring table 1 is arranged on the first mounting plate 19, and another laser emitter 22 is arranged on the second mounting plate 23. The second mounting plate 23 is arranged on one of the L-shaped bars 9 along the radial direction of the measuring table 1. An attitude adjustment mechanism is arranged between the first mounting plate 19 and the second mounting plate 23 and the arranged laser emitter 22 respectively. As Figure 1-8 shown, the laser emitter 22 is commercially available. The line laser projected by the laser emitter 22 forms a curved light strip on the surface of the blade 3. Through sub-pixel edge detection algorithms (such as the gray center of gravity method, Zernike moment fitting), the center coordinates of the light strip are extracted, and then combined with the data of the angle encoder of the measuring table to construct a three-dimensional contour curve (three-dimensional point cloud) of the edge of the blade 3; among them, through the two laser emitters 22 installed on the first mounting plate 19 and the second mounting plate 23, an orthogonal double-laser emitter layout is realized (the vertical laser emitter is vertically downward, and the horizontal laser emitter is horizontally lateral), covering the axial edge (such as the root or tip edge of the blade) and the circumferential edge (such as the leading edge or trailing edge) of the blade 3 respectively. The double-laser emitters scan synchronously. By performing NURBS surface fitting on the vertical-horizontal double-view measurement data of the edge of the blade 3, the projection distortion of a single view is eliminated. An attitude adjustment mechanism is further installed between the two laser emitters 22 and the first mounting plate 19 and the second mounting plate 23 respectively to adaptively adjust the attitude of the measuring mechanism relative to the blade, further improving the measurement accuracy of complex profiles.

[0023] In some embodiments, the attitude adjustment mechanism includes: a first vertical plate 24, a fixed block 25, and a mounting seat 26. One end of the first vertical plate 24 is vertically disposed at one end of the first mounting plate 19 and the second mounting plate 23 respectively. The other end of the first vertical plate 24 is provided with a first electric cylinder 27. The fixed end of the first electric cylinder 27 is connected to the first vertical plate 24, and the telescopic end of the first electric cylinder 27 extends towards the other ends of the first mounting plate 19 and the second mounting plate 23 respectively. A through hole 28 is provided at the center of the fixed block 25. An extension groove 29 is provided at the edge of the end of the through hole 28 away from the first vertical plate 24. The telescopic end of the first electric cylinder 27 slidably penetrates through the through hole 28 and extends into the extension groove 29. A pair of first rotating bars 30 are respectively connected to the telescopic end of the first electric cylinder 27. One end of a pair of the first rotating bars 30 is respectively rotatably connected to the telescopic end of the first electric cylinder 27. The other end of a pair of the first rotating bars 30 is respectively rotatably connected to a pair of second rotating bars 31. One end of a pair of the second rotating bars 31 away from the first rotating bars 30 is respectively connected to one end of the mounting seat 26 close to the fixed block 25. Rotating parts 32 are respectively provided on both sides of the fixed block 25. Connecting bars are respectively rotatably connected to the rotating parts 32. One end of each connecting bar is respectively rotatably connected to the rotating part 32, and the other end of each connecting bar is respectively connected to a mounting seat 26. The laser emitter 22 is provided at the end of the mounting seat 26 away from the fixed block 25. As Figure 1-8As shown, the attitude adjustment mechanism is respectively installed between the first mounting plate 19, the second mounting plate 23 and the laser emitter 22. Among them, an assembly groove adapted to the laser emitter 22 is provided on the mounting seat 26 for installing the laser emitter 22. The connection method can be in the form of bonding, bolt connection or snap connection. Among them, the first vertical plate 24 is installed on the first mounting plate 19 or the second mounting plate 23. The first electric cylinder 27 and the second electric cylinder 33 are both commercially available and are connected to a control device to realize the control of the states and parameters of the first electric cylinder 27 and the second electric cylinder 33. Among them, the telescopic end of the first electric cylinder 27 slidably penetrates through the through hole 28 and extends into the extension groove 29. And because the first electric cylinder 27 is connected to the first vertical plate 24, the fixed block 25 rotates around the first electric cylinder 27. When the first electric cylinder 27 makes a telescopic movement, because one end of the first electric cylinder 27 is rotatably connected to the first rotating bar 30, and the second rotating bar 31 is rotatably connected to the first rotating bar 30, the second rotating bar 31 is connected to the mounting seat 26, and the connecting bars on both sides of the mounting seat 26 are also rotatably connected to the rotating parts 32 on both sides of the fixed block 25. In this process, when the telescopic movement of the first electric cylinder 27 occurs, it will cause the telescopic end of the first electric cylinder 27, the first rotating bar 30 and the second rotating bar 31 to achieve a link motion, which will cause a change in the angle between the mounting seat 26 and the fixed block 25. Taking the first vertical plate 24 as the relative surface, a corresponding attitude sensor is also provided on the mounting seat 26. The attitude sensor is connected to a processor for real-time acquisition of the attitude data of the laser emitter, real-time obtaining of the current attitude data of the laser emitter, real-time monitoring of its attitude, and providing a reference for the later processing of three-dimensional point clouds. The attitude adjustment mechanism realizes fine adjustment of the attitude of the laser emitter 22 in the XZ direction relative to the first vertical plate.

[0024] In some embodiments, the first mounting plate 19 and the second mounting plate 23 are respectively provided with a second electric cylinder 33 near one of the rotating parts 32 of the fixed block 25. The fixed ends of the second electric cylinders 33 are respectively vertically arranged on the first mounting plate 19 and the second mounting plate 23. The telescopic ends of the second electric cylinders 33 are rotatably connected to the rotating parts 32 of the fixed block 25. As Figure 1-8As shown, the overall structure formed by the first electric cylinder 27, the second electric cylinder 33, the first vertical plate 24, the fixed block 25, and the first mounting plate 19 or the second mounting plate 23 is sufficient to support the movement of each component therein. For example, when the first electric cylinder 27 expands and contracts, the fixed block 25 connected to the second electric cylinder 33 is such that when the first electric cylinder 27 expands and contracts, the fixed block 25 can remain relatively stationary, so that the corresponding change in the angle of the mounting seat 26 relative to the fixed block 25 can be achieved; when the second electric cylinder 33 expands and contracts, since the second electric cylinder 33 is connected to one of the rotating parts 32, the fixed block 25 is pulled to rotate about the telescopic end of the first electric cylinder 27. During this process, with the first vertical plate 24 as the relative surface, the attitude of the laser emitter 22 in the XY direction relative to the first vertical plate is finely adjusted.

[0025] Specifically, the attitude adjustment mechanism can achieve fine adjustment of the attitude in the XZ and XY directions with the first vertical plate 24 as the relative surface. On the basis of the preliminary adjustment of the attitude of the blade 3 by the flipping mechanism, the steering mechanism, and the position adjustment mechanism, the attitude of the measuring mechanism relative to the blade 3 is further adjusted to achieve adaptive adjustment, so as to easily cope with the measurement of various complex surfaces; it dynamically adapts to the normal angle of the curved surface. For example, when there is a steep curved surface on the blade (such as the blade body profile inclination angle of the aviation blade > 60°) or a deep concave cavity (such as the depth of the tenon groove of the engine blade > 50 mm), the attitude adjustment device can adjust the pitch angle θ and the deflection angle φ of the laser emitter in real time, so that the laser optical axis and the normal of the measured point curved surface maintain the best triangulation angle between 45° and 60°; at the same time, it can eliminate the measurement blind area of the cooperative measurement of the two laser emitters. The vertical and horizontal laser emitters are compensated by attitude linkage (synchronous adjustment of the pitch of the vertical head and the yaw of the horizontal head), and the shadow area under the traditional fixed layout can be covered; for example: when measuring the sharp edge (width ≤ 0.3 mm) at the intersection of the suction surface and the pressure surface of the leading edge of the blade 3, the vertical head is tilted downward by 20° and the horizontal head is deflected to the left by 15°, forming a cross-shaped light strip projection. By fusing the coordinates of the two groups of light spots through the binocular vision algorithm, the spatial coordinates of the sharp edge are calculated (accuracy ±8 μm), and the measurement blind area is reduced compared with the fixed attitude measurement.

[0026] Specifically, the attitude adjustment mechanism can not only reduce the accuracy requirements for the subsequent clamping mechanism to clamp and position the blade 3. When the clamping mechanism cannot adaptively clamp and fix the blade 3 due to the edge shape of the blade 3, through the active adjustment of the attitude of the laser emitter 22, the influence of the clamping error on the measurement result during the initial clamping is compensated.

[0027] Specifically, the attitude adjustment mechanism can perform active compensation for geometric distortion. When measuring the variable cross-section blade body of the wind turbine blade 3, through attitude follow-up adjustment, it ensures that the projected length of the laser light strip at each measurement point is stabilized at the corresponding pixel value, avoiding the stretching or compression distortion of the light strip caused by the change in the surface curvature, and improving the profile measurement accuracy. In this process, based on the angle sensitivity of the laser triangulation method (the measurement error increases non-linearly with the increase in the deviation of the incident angle. For every 10° deviation of the incident angle, the distance measurement error increases by 15%), the attitude adjustment mechanism automatically adjusts the attitude of the laser emitter 22 through the real-time feedback of the normal vector data of the surface of the blade 3 (fitted from the previous point cloud data or preset by the CAD model), so that the deviation between the actual incident angle and the theoretical optimal angle is < ±2°, reducing the distance measurement error.

[0028] Specifically, the attitude adjustment mechanism can also perform dynamic calibration of motion errors. For example, when dealing with the gravity deformation of the blade 3 itself (such as when a large-sized aviation blade is vertically placed, the tip droops by 50 - 100 μm), the attitude adjustment makes the laser emitter tilt slightly along the direction of blade deformation, keeping the light strip always perpendicular to the local surface of the current measurement point, eliminating the measurement reference deviation caused by blade deformation. In this process, when the turntable rotates or the linear guide moves, the attitude adjustment device uses the inertial sensor set on the measurement table to monitor the device vibration in real time (with an accuracy of ±0.01° / s angular velocity). The inertial sensor is connected to the processor to obtain the device vibration information. Among them, the control device is configured with an inertial measurement unit (IMU), which suppresses the spot offset caused by mechanical vibration through vibration compensation adjustment of the attitude of the laser emitter.

[0029] In some embodiments, it further includes: a clamping mechanism disposed on the measurement table 1 to clamp the blade 3. The clamping mechanism includes: a positioning plate 34 vertically disposed on one side edge of the measurement table 1. A positioning hole is provided at the center of the positioning plate 34, and a fifth motor 35 is disposed in the positioning hole. The output shaft of the fifth motor 35 extends towards the center of the measurement table 1. A gear 36 is provided on the output shaft of the fifth motor 35. A rack 37 is respectively provided at the top and bottom of the gear 36. One end of a pair of the racks 37 meshes with the gear 36 respectively, and the other end of the pair of the racks 37 extends towards the two ends of the positioning plate 34 respectively; Two pairs of sliding rods 38 are arranged on the positioning plate 34 on the same side as the rack 37, and the two pairs of sliding rods 38 are located on both sides of the gear 36, and a support 39 is respectively arranged at both ends of the sliding rod 38, and the support 39 is connected to the positioning plate 34, and sliding blocks 40 are respectively arranged on the sliding rods 38, and a sliding bar 41 is arranged between the sliding blocks 40 on each pair of the sliding rods 38, and a clamping bar 42 is arranged on each of the sliding bars 41, and one end of the clamping bar 42 is vertically connected to the sliding bar 41, and the other end extends away from the positioning plate 34 and is movably connected to the clamping plate 43; One end of the rack 37 extending toward the two ends of the positioning plate 34 is vertically connected to a clamping bar 42. Figure 1-8 As shown, the positioning plate 34 is vertically mounted on one side edge of the measuring platform 1, so that the central axis of the positioning plate 34 coincides with the central axis of the measuring platform 1, and the fifth motor 35 is commercially available. The fifth motor 35 is connected to the control device to achieve control of its state and parameters. The connection between the output shaft of the fifth motor 35 and the gear 36 can be first connected to a rotating rod through the output shaft of the fifth motor 35, and then connected to the center hole of the gear 36 through the rotating rod. When the fifth motor 35 is working, the transmission is transmitted to the gear 36, so that the gear 36 drives the two meshing racks 37 to synchronously move away from or close to the center of the positioning plate 34 on both sides of the relative positioning plate 34. Movement, since the rack 37 is connected to the clamping bar 42, the clamping bar 42 is connected to the sliding bar 41, and the two ends of the sliding bar 41 are connected to the sliding blocks 40 on each pair of sliding rods, the sliding blocks 40 slide on the sliding rods, thereby transmitting the power to the rack 37 through the gear 36, so that the clamping plate 43 connected to the clamping bar 42 can center and clamp the blade 3 placed on the measuring table 1, which can realize the automatic clamping of the blade 3, and is compatible with blades 3 of various specifications, stabilize the measurement benchmark, reduce system errors, avoid repeated positioning of the blade 3 on the turntable to affect the accuracy, and provide a stable and reliable physical benchmark for subsequent laser measurement.

[0030] In some embodiments, a clamping surface 44 is provided on the side of the clamping plates 43 close to each other, a curved surface 45 is provided on the side of the clamping strip 42 close to the clamping plates 43, a mounting portion 46 is provided on the end of the clamping plates 43 away from each other, one end of the clamping strip 42 is rotatably connected to one end of the mounting portion, a rotating shaft 47 is provided on the other end of the mounting portion, the rotating shaft 47 is rotatably connected to the mounting portion, a torsion spring 48 is sleeved on the rotating shaft 47, and the two ends of the torsion spring 48 are respectively abutted between the clamping plates 43 and the curved surface 45. Figure 1-8As shown, an elastic cushion layer is provided on the clamping surface 44 of the clamping plate 43, which can increase the flexible contact and reduce the clamping stress. At the same time, the arc surface 45 provided can make the angle between the clamping plate 43 and the clamping strip 42 adjustable. When facing the blade 3 with a complex surface, the angle or radian of its edge cannot meet the clamping of two parallel clamping plates 43. By setting the torsion spring 48 to abut between the clamping plate 43 and the arc surface 45, with the rotation connection between the clamping plate 43 and the clamping strip 42 as the axis, the angle between the clamping plate 43 and the clamping strip 42 can be adjusted. It can achieve adaptive adjustment, eliminate the deformation and stress caused by the clamping force while ensuring the high-precision centering of the blade 3, improve the clamping efficiency and compatibility, and provide a stable and reliable physical reference for subsequent laser measurement.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation mode of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. Dual-laser blade edge measurement device, characterized in that, Comprising: A measuring table (1) with a base (2) provided below the measuring table (1); A flipping mechanism and a steering mechanism, which are arranged between the base (2) and the measuring table (1) to respectively realize multi-directional attitude and position adjustment of the measuring table (1); A measuring mechanism. When the measuring table (1) is placed horizontally, two are respectively vertically arranged along the radial and axial directions of the measuring table (1) to measure the blades (3) on the measuring table (1); A position adjustment mechanism, which is arranged directly above the measuring table (1). The position adjustment mechanism is used to realize the position adjustment of the measuring mechanism arranged along the axial direction of the measuring table (1) relative to the radial direction of the measuring table (1); An attitude adjustment mechanism, one is arranged near each measuring mechanism. The attitude adjustment mechanism is respectively used to adjust the attitude of the measuring mechanism relative to the blade (3); A control device, which is used to control the multi-directional attitude and position adjustment of the measuring table (1), control the measuring mechanism to measure the blade (3), control the position adjustment of the position adjustment mechanism relative to the radial direction of the measuring table (1), and control the attitude adjustment mechanism to respectively adjust the attitude of each measuring mechanism relative to the blade (3).

2. The dual-laser blade edge measurement device according to claim 1, characterized in that: The flipping mechanism includes: a pair of side plates (4), which are respectively vertically arranged on both sides of the base (2). Rotation holes (5) are respectively arranged at the tops of the side plates (4). Rotation blocks (6) are respectively arranged in the rotation holes (5). The rotation blocks (6) are rotationally connected to the rotation holes (5). An equipment box (7) is arranged near one of the side plates (4). A first motor is arranged in the equipment box (7). The output shaft of the first motor rotatably penetrates the equipment box (7) and is connected to the adjacent rotation block (6).

3. The dual-laser blade edge measurement device according to claim 2, characterized in that: The steering mechanism includes: a rotating seat (8), which is arranged between a pair of the rotation blocks (6). A second motor is arranged in the rotating seat (8). The second motor is arranged at the center of the bottom of the rotating seat (8). A rotating part is arranged at the top of the rotating seat (8). A rotating ring adapted to the rotating part is arranged at the bottom of the measuring table (1). The measuring table (1) is rotationally connected to the rotating part through the rotating ring; the output shaft of the second motor rotatably penetrates the rotating part and is connected to the center of the bottom of the measuring table (1).

4. The dual-laser blade edge measurement device according to claim 1, characterized in that: The position adjustment mechanism includes: a pair of L-shaped bars (9) and a cross beam (10). The horizontal ends of the pair of L-shaped bars (9) are respectively connected to both ends of the base (2). The vertical ends of the pair of L-shaped bars (9) respectively extend upward and are respectively connected to both ends of the cross beam (10); A sliding seat (11) adapted to the cross beam (10) is arranged on the cross beam (10). A pair of slide rails (12) are arranged along the length direction of the cross beam (10). Sliders (13) are respectively arranged on the pair of slide rails (12). The sliders (13) are slidably connected to the slide rails (12) and the sliders (13) are respectively connected to the sliding seat (11); A first screw rod (14) is further arranged along the length direction of the cross beam (10). A pair of support seats (15) are respectively arranged at two ends of the first screw rod (14). The first screw rod (14) is respectively rotatably connected to the support seats (15). A first sliding block is arranged on the first screw rod (14). The first sliding block is in threaded connection with the first screw rod (14). The first sliding block is connected to one side of the sliding seat (11) close to it. A third motor (16) is arranged on the cross beam (10) close to one of the support seats (15). The output shaft of the third motor (16) is connected to one end of the first screw rod (14) close to it.

5. The dual-laser blade edge measurement device according to claim 4, characterized in that: A sliding groove (17) is arranged along the height direction of the sliding seat (11). Sliding grooves (18) are respectively arranged at two side edges of the sliding groove (17). A first mounting plate (19) is arranged between the pair of sliding grooves (18). Two sides of the first mounting plate (19) respectively slide in the sliding grooves (18) in the height direction of the sliding seat (11). A second screw rod (20) is arranged along the height direction of the sliding seat (11) in the sliding groove (17). Two ends of the second screw rod (20) are respectively rotatably connected to two end walls of the sliding groove (17). A second sliding block is arranged on the second screw rod (20). The second sliding block is in threaded connection with the second screw rod (20). The second sliding block is connected to one side of the first mounting plate (19) close to it. A fourth motor (21) is arranged at the top of the sliding seat (11). The output shaft of the fourth motor (21) rotatably penetrates through the top of the sliding seat (11) and is connected to one end of the second screw rod (20) close to it.

6. The dual-laser blade edge measurement device according to claim 5, characterized in that: The measuring mechanism includes: a laser emitter (22). The laser emitter (22) arranged along the axial direction of the measuring table (1) is arranged on the first mounting plate (19). Another laser emitter (22) is arranged on a second mounting plate (23). The second mounting plate (23) is arranged on one of the L-shaped bars (9) along the radial direction of the measuring table (1). An attitude adjusting mechanism is arranged between the first mounting plate (19) and the second mounting plate (23) and the arranged laser emitter (22).

7. The dual-laser blade edge measurement device according to claim 6, characterized in that: The attitude adjusting mechanism includes: a first vertical plate (24), a fixing block (25) and a mounting seat (26). One end of the first vertical plate (24) is respectively vertically arranged at one end of the first mounting plate (19) and the second mounting plate (23). A first electric cylinder (27) is arranged at the other end of the first vertical plate (24). The fixed end of the first electric cylinder (27) is connected to the first vertical plate (24). The telescopic end of the first electric cylinder (27) respectively extends towards the other ends of the first mounting plate (19) and the second mounting plate (23). A through hole (28) is provided at the center of the fixed block (25). An extension groove (29) is provided at the edge of one end of the through hole (28) away from the first vertical plate (24). The telescopic end of the first electric cylinder (27) slidably penetrates through the through hole (28) and extends into the extension groove (29). A pair of first rotating bars (30) are respectively connected to the telescopic end of the first electric cylinder (27). One ends of the pair of first rotating bars (30) are respectively rotatably connected to the telescopic end of the first electric cylinder (27). The other ends of the pair of first rotating bars (30) are respectively rotatably connected to a pair of second rotating bars (31). One ends of the pair of second rotating bars (31) away from the first rotating bars (30) are respectively connected to one end of the mounting seat (26) close to the fixed block (25). Rotating parts (32) are respectively provided on both sides of the fixed block (25). Connecting bars (49) are respectively rotatably connected to the rotating parts (32). One ends of the connecting bars (49) are respectively rotatably connected to the rotating parts (32). The other ends of the connecting bars (49) are respectively connected to the mounting seat (26). The laser emitter (22) is provided at one end of the mounting seat (26) away from the fixed block (25).

8. The dual-laser blade edge measurement device according to claim 7, characterized in that: Second electric cylinders (33) are respectively provided on one rotating part (32) of the first mounting plate (19) and the second mounting plate (23) close to the fixed block (25). The fixed ends of the second electric cylinders (33) are respectively vertically provided on the first mounting plate (19) and the second mounting plate (23). The telescopic ends of the second electric cylinders (33) are rotatably connected to the rotating parts (32) of the fixed block (25).

9. The dual-laser blade edge measurement device according to claim 1, characterized in that: It further includes: a clamping mechanism provided on the measuring table (1) to clamp the blade (3). The clamping mechanism includes: a positioning plate (34) vertically provided at one side edge of the measuring table (1). A positioning hole is provided at the center of the positioning plate (34). A fifth motor (35) is provided in the positioning hole. The output shaft of the fifth motor (35) extends towards the center of the measuring table (1). A gear (36) is provided on the output shaft of the fifth motor (35). A rack (37) is respectively provided at the top and bottom opposite to the gear (36). One ends of the pair of racks (37) are respectively meshed with the gear (36). The other ends of the pair of racks (37) respectively extend towards both ends of the positioning plate (34). On the positioning plate (34) on the same side as the rack (37), two pairs of sliding rods (38) are provided, and the two pairs of sliding rods (38) are located on both sides of the gear (36). At both ends of each sliding rod (38), a support (39) is respectively provided, and the support (39) is connected to the positioning plate (34). Sliding blocks (40) are respectively arranged on the sliding rods (38). Between the sliding blocks (40) on each pair of sliding rods (38), a sliding strip (41) is provided. A clamping strip (42) is arranged on each sliding strip (41). One end of the clamping strip (42) is vertically connected to the sliding strip (41), and the other end extends away from the positioning plate (34) and is movably connected to a clamping plate (43). One end of the rack (37) extending towards both ends of the positioning plate (34) is respectively vertically connected to one of the clamping strips (42).

10. The dual-laser blade edge measurement device according to claim 9, characterized in that: On the side where the clamping plates (43) face each other, a clamping surface (44) is provided. On the side of the clamping strip (42) close to the clamping plate (43), an arc surface (45) is provided. At the ends of the clamping plates (43) facing away from each other, a mounting portion (46) is provided. One end of the clamping strip (42) and one end of the mounting portion (46) are rotatably connected. At the other end of the mounting portion (46), a rotating shaft (47) is provided, and the rotating shaft (47) is rotatably connected to the mounting portion (46). A torsion spring (48) is sleeved on the rotating shaft (47), and both ends of the torsion spring (48) respectively abut against the clamping plate (43) and the arc surface (45).

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