Dynamic and static calibration device and method for laser tracker

Abstract

The invention relates to the field of laser tracker calibration, and particularly discloses a dynamic and static calibration device and method for a laser tracker, and the device comprises a connecting piece, and a dust cleaning piece, an air pipe, a cylinder and a communicating pipe which are arranged in the connecting piece. According to the dynamic and static calibration device and method for the laser tracker, when the communicating pipe is in the negative pressure state, the two dust cleaning pieces in the connecting piece are in the air suction state through the cylinder and the air pipe, so that dust and floating objects on the surface area of a target are sucked, and the calibration accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser tracker calibration, and in particular to a dynamic and static calibration device and method for a laser tracker. Background Art

[0002] In recent years, with the increase of some large workpieces and special engineering projects, the installation and positioning accuracy of the workpieces has become higher and higher, and generally requires sub-millimeter positioning accuracy. Ordinary measuring instruments such as theodolites and total stations can hardly meet the positioning and measurement needs of the above projects. Fortunately, thanks to the large-scale three-dimensional coordinate measuring machine-laser tracker, it is widely used in various fields in China. The laser tracker is the largest-scale measuring instrument with the highest measurement accuracy in the current industrial measurement system. It can track the moving target in space in real time, and measure the real-time spatial three-dimensional coordinates of the target by locking the target and the reflection of the laser beam.

[0003] A Chinese patent document with publication number CN109764806B discloses a dynamic and static calibration device for a laser tracker, including a grating measuring device and a horizontal plate and a vertical plate perpendicular to each other. The horizontal plate is used to place the laser tracker, and a vertical guide rail and a two-dimensional grating in the grating measuring device are fixed on the vertical plate. A slider is slidably connected to the vertical guide rail, and the slider is fixedly connected to one end of a probe, and the other end of the probe is connected to the two-dimensional grating. The slider is also fixedly connected to one end of a target base, and a target is fixed to the other end of the target base, and the probe and the target base are arranged opposite to each other.

[0004] During the use of the dynamic and static calibration device of the laser tracker mentioned above, when the target slides in a circular trajectory, it will disturb the surrounding air and form airflow. The airflow may carry dust particles in the air, making it easier for them to adhere to the target glass. In addition, the target glass rubs against the air and is easily charged with static electricity. These static charges will charge the surface of the target ball, thereby attracting surrounding particles or dust to adhere to the glass. When dust floating on the surface of the target glass accumulates, it will affect the connection between the target and the laser tracker, resulting in a large deviation in the detection results. Summary of the invention

[0005] The present invention provides a dynamic and static calibration device and method for a laser tracker, aiming to solve the problem in the related art that when a target moves, the airflow may drive dust particles in the air to adhere to the target glass, and the target glass rubs against the air, so that the target glass is easily charged with static electricity, thereby attracting surrounding particles or dust to adhere to the glass.

[0006] The dynamic and static calibration device of the laser tracker of the present invention comprises: a laser tracker, a connecting seat is provided on one side of the laser tracker, a grating measuring device and a connecting member are provided on the connecting seat, a pointer is provided on the connecting member, a mounting seat is slidably connected inside the connecting member, and a target is provided on the mounting seat;

[0007] The inner wall of the mounting seat is provided with two connecting grooves, and dust cleaning pieces are arranged inside the two connecting grooves. The two dust cleaning pieces are symmetrical with the mounting seat as the center. The dust cleaning piece located above the mounting seat has an air suction state and a blowing state, and the dust cleaning piece located below the mounting seat has an air suction state. When the dust cleaning pieces on the upper and lower sides are in the air suction state, they can absorb dust and floating objects in the target surface area. When the dust cleaning piece above the mounting seat is changed from the air suction state to the blowing state, the dust cleaning piece below the mounting seat is continuously in the air suction state. The dust cleaning piece in the blowing state blows gas toward the surface of the target, which can blow off the dust and floating objects attached to the target glass, and the dust cleaning piece in the air suction state continuously absorbs the dust and floating objects that fall from the target surface.

[0008] Preferably, a dust suction assembly is installed inside the connecting member, and the dust suction assembly can make the two dust cleaning members both be in a suction state, so as to absorb dust and attachments in the target surface area, and the dust suction assembly includes a cylinder arranged on one side of the mounting seat, and the upper and lower ends of the cylinder are connected to the corresponding dust cleaning members by air pipes, and the outer surface of the cylinder is fixedly connected to a connecting pipe;

[0009] When the connecting pipe is in a negative pressure state, the two dust cleaning members are both in an air suction state to absorb dust and attachments in the target surface area.

[0010] Preferably, a blowing assembly is arranged inside the connecting member, which can put the dust cleaning member located above the mounting seat in a blowing state, and the blowing assembly includes a lifting plate arranged inside the connecting member, a fourth groove located above the mounting seat is opened on the connecting member, and the lifting plate is slidably connected to the inside of the fourth groove, an air supply pipe is arranged on one side of the lifting plate, a fixing block is fixed to the outer surface of the air supply pipe, and a ventilation pipe is fixedly connected to the top of the connecting member;

[0011] When the air supply pipe moves to the corresponding dust cleaning part, the fixed block can block the air pipe located above the mounting seat and strengthen the negative pressure inside the air pipe located below the mounting seat. After the air supply pipe moves to the corresponding dust cleaning part, the ventilation pipe is connected to the air supply pipe, and the ventilation pipe can transport gas to the interior of the air supply pipe. When the gas flows to the dust cleaning part connected thereto, the dust cleaning part located above the mounting seat can be put into a blowing state.

[0012] Preferably, the lifting plate is provided with a first guide rail, the interior of the first guide rail is slidably connected with a linkage column, a collar is fixed on the outer surface of the linkage column, and the outer surface of the top end of the air supply pipe is fixed on the inner wall of the collar;

[0013] When the linkage column slides from the top end of the first guide rail to its bottom end, the linkage column drives the air supply pipe to slide through the ring, and the air supply pipe slides to the corresponding dust cleaning piece and is connected with it, so that the dust cleaning piece located above the mounting seat is in a blowing state, and the dust cleaning piece located below the mounting seat is in an air suction state. When the linkage column slides from the bottom end of the first guide rail to its top end and resets, both of the dust cleaning pieces are in the air suction state.

[0014] Preferably, the connecting member is provided with a first driving assembly, the first driving assembly comprises a bottom frame and a top frame arranged on the top of the connecting member, and a telescopic member is fixed between the top of the bottom frame and the bottom of the top frame;

[0015] When the top frame moves up, it can drive the lifting plate to move up, so that the linkage column slides from the top end of the first guide rail to its bottom end; when the top frame moves down and resets, the lifting plate also moves down, and the linkage column slides from the bottom end of the first guide rail to its top end for reset.

[0016] Preferably, the connecting seat is provided with a second driving assembly, the second driving assembly comprises a top frame mounted on the connecting seat, the top of the connecting member is slidably connected to the bottom of the top frame, a second guide rail is provided on the top frame, and a guide column is slidably connected inside the second guide rail;

[0017] When the guide post slides from one end of the second guide rail to the other end thereof, the top frame is in an upward state; when the guide post slides from the other end of the second guide rail to one end thereof for restoration, the top frame changes from the upward state to the downward state.

[0018] Preferably, an ash-flinging assembly is provided inside the connecting piece, and the ash-flinging assembly includes a rotating shaft rotatably connected to the inner wall of the connecting piece, a cross limit groove is opened in the middle of the rotating shaft, a cross limit block is slidably connected inside the cross limit groove, and one end of the cross limit block is fixed on one side of the mounting seat, and the cross limit groove cooperates with the cross limit block to limit the mounting seat.

[0019] Preferably, a linkage gear ring is fixed on the outer surface of the rotating shaft, an arc-shaped limiting groove is formed on a side of the linkage gear ring away from the mounting seat, an elastic limiting column is fixed on the inner wall of the connecting member, and the elastic limiting column is inserted into the corresponding arc-shaped limiting groove;

[0020] The arc-shaped limiting groove cooperates with the elastic limiting column to limit the rotating shaft, thereby maintaining the stability of the rotating shaft.

[0021] Preferably, a connecting frame is fixed to the bottom of the lifting plate, and a driving tooth plate is slidably connected to the inner bottom wall of the connecting frame. A plurality of square openings are provided on the side of the connecting frame facing the mounting seat, and the teeth of the driving tooth plate are located inside the square openings. A pushing column is fixed to one side wall of the driving tooth plate, and an opening is provided on the connecting frame, and the pushing column is slidably connected to the inside of the opening. Four triangular guide plates are fixed to the inner cavity wall of the connecting piece, and the four triangular guide plates are grouped in pairs, and the two groups of triangular guide plates are symmetrical with the lifting plate as the center, and the two triangular guide plates in each group are arranged up and down.

[0022] The present invention also provides a method for dynamic and static calibration of a laser tracker, comprising the following steps:

[0023] Step 1: Pull out the mounting seat, install the target on the mounting seat, and then slide the mounting seat into the interior of the connector;

[0024] Step 2: Turn on the second driving component, and drive the connecting member to slide in the area of ​​the grating measuring device for detection through the second driving component;

[0025] Step 3: When the connecting member slides from one end of the second guide rail to the other end thereof, the two dust cleaning members are both in the suction state; when the connecting member slides from the other end of the second guide rail to the one end thereof to reset, the dust cleaning member above the mounting seat is in the blowing state, and the dust cleaning member below the mounting seat is in the suction state;

[0026] Step 4: After the sliding of the connecting piece is completed, the sliding distance of the pointer on the grating measuring device is collected, and the results of the laser tracker and the target are collected and then compared, so as to calibrate the laser tracker.

[0027] The beneficial effects of the present invention are:

[0028] 1. Through the connecting groove opened on the connecting piece, the dust cleaning piece arranged inside the connecting groove, the air pipe, cylinder and connecting pipe arranged inside the connecting piece, when the connecting pipe is in a negative pressure state, the two dust cleaning pieces are in an air suction state, thereby being able to absorb dust and floating objects on the target surface area, and preventing dust and floating objects from adhering and accumulating on the target glass surface to affect detection.

[0029] 2. Through the fourth groove opened on the connecting piece, the lifting plate arranged inside the fourth groove, the first guide rail opened on the lifting plate, the linkage column arranged inside the first guide rail, the ring connected to the linkage column, the air supply pipe and the fixed block arranged on the ring, and the ventilation pipe connected to the connecting piece, when the fixed block slides to the side away from the air supply pipe, the fixed block blocks the air pipe above the mounting seat, strengthens the negative pressure of the air pipe below the mounting seat, thereby strengthening its suction state. After the air supply pipe moves to the corresponding dust cleaning piece, the ventilation pipe is connected to the air supply pipe, and the ventilation pipe can transport gas to the inside of the air supply pipe to the inside of the dust cleaning piece connected thereto, so that the dust cleaning piece above the mounting seat is in a blowing state, which can enable the wind to blow away the dust and attachments on the surface of the target glass, thereby reducing the accumulation of dust and attachments on the surface of the target glass.

[0030] 3. The dust-removing assembly provided inside the connecting piece can drive the target to rotate around its center, thereby removing dust and attachments attached to its surface, thereby reducing the impact of the attachments on its surface on the target. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 is a schematic structural diagram of a second drive assembly of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the top frame of the present invention;

[0034] Figure 4 It is a schematic structural diagram of a connecting piece of the present invention;

[0035] Figure 5 is a schematic structural diagram of a first three-dimensional cross section of a connecting piece of the present invention;

[0036] Figure 6 is a schematic structural diagram of the dust collection assembly of the present invention;

[0037] Figure 7 is a schematic structural diagram of a second three-dimensional cross section of a connecting piece of the present invention;

[0038] Figure 8 is a schematic structural diagram of the blowing assembly of the present invention;

[0039] Fig. 9 is a schematic structural diagram of a third three-dimensional cross section of a connecting piece of the present invention;

[0040] Fig.10 is a schematic structural diagram of a fourth three-dimensional cross section of a connecting member of the present invention;

[0041] Fig.11is a schematic structural diagram of a fifth three-dimensional cross section of the connecting member of the present invention;

[0042] Fig.12 is a schematic structural diagram of Embodiment 2 of the present invention;

[0043] Fig.13 It is a structural schematic diagram of the dust throwing assembly of the present invention;

[0044] Fig.14 It is a schematic diagram of the structure of the cross limit block and the cross limit groove of the present invention;

[0045] Fig.15 It is a structural schematic diagram of the connection frame of the present invention;

[0046] Fig.16 It is a structural schematic diagram of a first three-dimensional cross section of a connection frame of the present invention.

[0047] Reference numerals:

[0048] 10. Laser tracker; 11. Connecting seat; 12. Grating measuring device; 13. Connecting piece; 14. Pointer; 15. Mounting seat; 16. Target; 17. Connecting slot; 18. Dust removal piece;

[0049] 20, first groove group; 201, first arc-shaped slide groove; 202, first groove; 203, second groove; 204, third groove;

[0050] 30. Dust collection assembly; 31. Cylinder; 32. Air pipe; 34. Connecting pipe; 35. Lifting column; 36. Sealing plate;

[0051] 40. Blowing assembly; 41. Lifting plate; 42. First guide rail; 43. Linkage column; 44. Air supply pipe; 45. Fixing block; 46. Fourth groove; 47. Fifth groove; 48. Ring; 49. Ventilation pipe;

[0052] 50. first driving assembly; 51. bottom frame; 52. top frame; 53. telescopic member; 54. arc-shaped guide plate; 55. first return spring; 57. exhaust port;

[0053] 60. Second drive assembly; 61. Top frame; 62. Second guide rail; 63. Guide column; 64. First drive source; 65. First threaded screw; 66. Second drive source; 67. Second threaded screw;

[0054] 70. Dust-flinging assembly; 71. Rotating shaft; 72. Cross limit block; 73. Cross limit slot; 74. Elastic limit column; 75. Arc limit slot; 76. Connecting frame; 77. Driving gear plate; 78. Linking gear ring; 79. Opening; 710. Push column; 711. Triangular guide plate. DETAILED DESCRIPTION

[0055] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0056] Embodiment 1

[0057] like Figures 1 to 11 As shown, the dynamic and static calibration device of the laser tracker of the present invention comprises:

[0058] A laser tracker 10 is provided with a connecting seat 11 on one side of the laser tracker 10, a grating measuring device 12 and a connecting piece 13 are provided on the connecting seat 11, and the inner cavity of the connecting piece 13 faces the laser tracker 10, a pointer 14 is provided on the side of the connecting piece 13 facing the connecting seat 11, a mounting seat 15 is slidably connected to the inner cavity of the connecting piece 13, and the mounting seat 15 is circular, a target 16 is installed on the mounting seat 15, a connecting groove 17 is provided at the top and bottom of the inner cavity of the mounting seat 15, and the connecting groove 17 is bucket-shaped, a dust cleaning piece 18 is movably connected inside the connecting groove 17, and the dust cleaning piece 18 is composed of a wind bucket and an elastic piece, the elastic piece is fixed at the bottom of the wind bucket, and the two dust cleaning pieces 18 are symmetrical with the mounting seat 15.

[0059] The dust cleaning piece 18 located above the mounting seat 15 has an air suction state and an air blowing state, and the dust cleaning piece 18 located below the mounting seat 15 has an air suction state. When the upper dust cleaning piece 18 is in the air suction state, the lower dust cleaning piece 18 is also in the air suction state. At this time, the two dust cleaning pieces 18 can absorb dust on the surface area of ​​the target 16, and can prevent dust from accumulating on the surface area of ​​the target 16 and adhering to the glass of the target 16, thereby maintaining the connection between the target 16 and the laser tracker 10. When the dust cleaning piece 18 above the mounting seat 15 is changed from the air suction state to the air blowing state, the dust cleaning piece 18 below the mounting seat 15 is also in the air suction state. The dust cleaning piece 18 in the air blowing state can blow gas to the surface of the target 16 glass, thereby blowing off the dust attached to the surface of the target 16 glass, and the blown away dust is absorbed by the dust cleaning piece 18 below, thereby reducing the accumulation of dust on the surface of the target 16 glass.

[0060] A side sliding opening is provided on the side of the connecting member 13, and a handle is slidably connected inside the side sliding opening. A circular track is provided on the outer surface of the mounting seat 15, and one end of the handle is slidably connected inside the circular track.

[0061] When in use, the mounting seat 15 is first slid from the deep cavity of the connecting member 13 to its cavity opening by pulling the handle, and then the target 16 is mounted on the mounting seat 15, and the mounting seat 15 is moved from the cavity opening of the connecting member 13 to its deep cavity, and the laser tracker 10 is connected to the target 16, and the connecting member 13 drives the mounting seat 15 and the target 16 to slide and detect in the area of ​​the grating measuring device 12, and the sliding track of the connecting member 13 is linear and circular. When the connecting member 13 is sliding, the two dust cleaning members 18 are first in an air suction state, which can absorb dust and floating objects in the surface area of ​​the target 16, thereby preventing dust and floating objects from adhering to the glass surface of the target 16, and preventing dust and floating objects from affecting the connection between the target 16 and the laser tracker 10, and then the upper dust cleaning member 18 The state is changed from the suction state to the blowing state, and the dust cleaning piece 18 in the blowing state can blow the gas to the surface of the target 16 glass, blowing the dust and floating objects attached to the surface of the target 16 to fall off, and the dust cleaning piece 18 below is continuously in the suction state, which can absorb the dust and floating objects falling from the surface of the target 16. When the connecting piece 13 finishes sliding along a straight line or a circular trajectory, the sliding trajectory of the pointer 14 can be measured by the grating measuring device 12, and the motion trajectory of the target 16 measured by the laser tracker 10 is combined with the sliding trajectory of the pointer 14 for comparison. If there is an error, the staff can calibrate the target 16 and the laser tracker 10. After the detection, the mounting seat 15 is pulled toward the cavity of the connecting piece 13 by the handle to remove the target 16.

[0062] refer to Figure 5 , Figure 6 and Fig.11 As shown, a first groove group 20 is provided inside the connecting member 13, and the first groove group 20 includes a first arc-shaped groove 201, a first groove 202, a second groove 203 and a third groove 204. The two first arc-shaped grooves 201 are symmetrical with the first groove 202 as the center, one end of the first arc-shaped groove 201 is connected to the connecting groove 17, and the other end of the first arc-shaped groove 201 is connected to the first groove 202, and the first groove 202 and the third groove 204 are both cylindrical, and the second groove 203 is connected to the third groove 204, and the second groove 203 is square.

[0063] refer to Figure 6 , Figure 7 and Fig.11 As shown, a dust suction assembly 30 is installed inside the first slot group 20, which can drive the two dust cleaning parts 18 to be in a suction state, thereby sucking dust from the area around the target 16 and reducing the amount of dust attached to the glass surface of the target 16.

[0064] The dust collecting assembly 30 includes a cylinder 31 fixed on the inner wall of the first groove 202 . The upper and lower ends of the cylinder 31 are fixedly connected with an air pipe 32 , and the air pipe 32 is located inside the first arc-shaped slide groove 201 .

[0065] The air pipe 32 has a first pipe section, a second pipe section and a third pipe section, and the second pipe section is located between the first pipe section and the third pipe section, one end of the first pipe section is connected to one end of the dust cleaning piece 18 adjacent to it, the other end of the first pipe section is connected to one end of the second pipe section, the end of the second pipe section away from the first pipe section is connected to one end of the third pipe section, and the end of the third pipe section away from the second pipe section is connected to the end of the cylinder 31 corresponding to it.

[0066] A connecting pipe 34 is fixedly connected to the outer surface of the cylinder 31, one end of the connecting pipe 34 passes through the inner wall of the first groove 202 and extends to the inside of the second groove 203, a lifting column 35 is slidably connected to the inner wall of the third groove 204, a sealing plate 36 is fixed to the bottom of the lifting column 35, and the sealing plate 36 is located inside the second groove 203, and a rubber sealing pad is connected to the edge of the sealing plate 36.

[0067] The lifting column 35 moves upward inside the third groove 204, and at the same time, the lifting column 35 drives the sealing plate 36 to move upward, and the inside of the second groove 203 is drawn by the sealing plate 36 and is in a negative pressure state. Since a one-way valve is installed inside the connecting pipe 34, and the connecting pipe 34 can only take in air but not exhaust air, when the second groove 203 is in a negative pressure state, the two dust cleaning parts 18 are in an air suction state. At this time, the dust and floating objects on the surface area of ​​the target 16 pass through the dust cleaning part 18, the air pipe 32, and the connecting pipe 34 to the inside of the second groove 203 in turn, so as to absorb the dust and floating objects on the surface of the target 16 and prevent the dust and floating objects from accumulating on the glass surface of the target 16.

[0068] refer to Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, a blowing assembly 40 is provided inside the connecting member 13 , which can convert the suction state of the dust cleaning member 18 located above the target 16 into a blowing state, thereby blowing away the dust and floating objects attached to the glass surface of the target 16 .

[0069] The blowing assembly 40 includes a lifting plate 41 arranged inside the connecting member 13, and a fourth groove 46 and a fifth groove 47 are provided on the connecting member 13, and the fourth groove 46 and the fifth groove 47 are both located above the connecting member 13, and the fourth groove 46 and the fifth groove 47 are connected, and the lifting plate 41 is slidably connected inside the fourth groove 46, and the fourth groove 46 is used to limit the lifting plate 41, so as to maintain the stability of the lifting plate 41 during vertical sliding, and the second pipe section of the air pipe 32 above the target 16 is located inside the fifth groove 47, and a ventilation pipe 49 is fixedly connected to the top of the connecting member 13, and the ventilation pipe 49 is connected to the fifth groove 47, and a first guide rail 42 is provided on the lifting plate 41.

[0070] The first guide rail 42 consists of a first vertical section, a first oblique section and a second vertical section. The first vertical section is connected to the second vertical section through the first oblique section. The second vertical section is located below the first vertical section. The first vertical section is far away from the mounting seat 15, and the second vertical section is close to the mounting seat 15. The top end of the first oblique section is connected to the bottom end of the first vertical section, and the bottom end of the first oblique section is connected to the top end of the second vertical section.

[0071] A fixing block 45 is fixed to the outer wall of the second pipe section located inside the fifth groove 47, and an air supply pipe 44 is fixed to the side of the fixing block 45 away from the second pipe section, and the air supply pipe 44 is arc-shaped, and can send wind into the interior of the dust cleaning piece 18 through the first pipe section connected to it, so that the wind blows toward the glass surface of the target 16, and can blow away the dust and attachments attached to the glass surface of the target 16. A linkage column 43 is arranged inside the first guide rail 42, and one end of the linkage column 43 is slidably connected to the inner wall of the fourth groove 46, and the other end of the linkage column 43 is slidably connected to the inner wall of the fifth groove 47, a ring 48 is fixed to the outer surface of the linkage column 43, and one end of the air supply pipe 44 away from the first pipe section is fixed on the inner wall of the ring 48, which is used to limit the air supply pipe 44, thereby maintaining the stability of the air supply pipe 44.

[0072] When the lifting column 35 moves upward, the lifting plate 41 is also in an upward state, and the linkage column 43 slides from the top of the first vertical section to its bottom. When the linkage column 43 slides to the first oblique section, the fixing block 45 slides to the side away from the linkage column 43. When the linkage column 43 slides from the top of the first oblique section to its bottom, the second pipe section located inside the fifth groove 47 will be separated from the first pipe section and the third pipe section, and the fixing block 45 will block the first pipe section and the third pipe section. At this time, the negative pressure inside the air pipe 32 below the target 16 will be enhanced, thereby increasing the dust and floating particles on the surface area of ​​the target 16. The suction strength of floating objects is that when the linkage column 43 slides from the top of the first oblique section to its bottom, the pipe opening at the bottom end of the air supply pipe 44 is connected with the pipe opening of the first pipe section, and the pipe opening at the top end of the air supply pipe 44 is connected with the pipe opening at the bottom end of the ventilation pipe 49, and the ventilation pipe 49 can input gas into the interior of the air supply pipe 44, and the gas inside the air supply pipe 44 is sent from the first pipe section to the interior of the corresponding dust cleaning piece 18, and blown to the glass surface of the target 16, thereby blowing the wind to the glass on the surface of the target 16, so that the dust and floating objects attached to it fall off, thereby reducing the influence of dust and floating objects on the target 16 during detection.

[0073] refer to Figure 5 , Figure 6 and Figure 7 As shown, a first driving assembly 50 is provided on the connecting member 13 for controlling the dust cleaning member 18 to clean the dust and floating objects on the surface of the target 16 , thereby preventing dust and floating objects from accumulating on the glass surface of the target 16 .

[0074] The first driving assembly 50 includes a bottom frame 51 and a top frame 52 arranged on the top of the connecting member 13, a telescopic member 53 is fixed between the top of the bottom frame 51 and the bottom of the top frame 52, and the tops of the lifting columns 35 and the lifting plates 41 are fixed to the bottom of the top frame 52. When the top frame 52 moves up, the interior of the second groove 203 can be in a negative pressure, so that both dust cleaning members 18 are in an air suction state. When the top frame 52 moves down, the air supply pipe 44 can slide to the first pipe section corresponding to it, so that the dust cleaning member 18 above the target 16 is in a blowing state, and the dust cleaning member 18 below the target 16 is in an air suction state.

[0075] Exhaust ports 57 are provided on both sides of the connecting member 13, and an arc-shaped guide plate 54 is slidably connected to the inner wall of the second groove 203. The initial position of the arc-shaped guide plate 54 is located above the exhaust port 57, and the top of the arc-shaped guide plate 54 is arc-shaped. A first reset spring 55 is fixed to the bottom of the arc-shaped guide plate 54 for supporting the arc-shaped guide plate 54, thereby facilitating the reset of the arc-shaped guide plate 54.

[0076] When the top frame 52 moves upward, the top frame 52 simultaneously drives the lifting column 35 and the lifting plate 41 to move upward. When the lifting column 35 moves upward, the gas inside the second groove 203 is extracted, thereby enhancing the negative pressure state inside the second groove 203, so that the two dust cleaning parts 18 are in the suction state, and the dust and floating objects in the surface area of ​​the target 16 are absorbed, and the linkage column 43 simultaneously passes through the first vertical section and the first oblique section on the lifting plate 41 to slide to the second vertical section in sequence. When the linkage column 43 slides from the top end of the first oblique section to the bottom end thereof, the linkage column 43 drives the fixing block 45 to slide to the side away from the air supply pipe 44 through the collar 48 and the air supply pipe 44, and the two sides of the fixing block 45 respectively block the first pipe section and the third pipe section. When the top frame 52 moves up to the limit height, the linkage column 43 is located at the bottom end of the second vertical section, and the air supply pipe 44 is connected to the first pipe section located above the mounting seat 15.

[0077] After the top frame 52 moves up to the maximum height, it will descend. At this time, the gas in the bottom frame 51, the top frame 52 and the inner area of ​​the telescopic member 53 is transported to the inside of the air supply pipe 44 by the ventilation pipe 49, and the gas inside the air supply pipe 44 flows to the dust cleaning piece 18 through the first pipe section connected thereto, thereby blowing the gas to the glass surface of the target 16, cleaning the dust and floating objects attached to the glass surface of the target 16. At the same time, the lifting column 35 drives the sealing plate 36 to descend in height, and the gas inside the second groove 203 will push the arc guide plate 54 to move down to the exhaust port 57. At this time, the second groove 203 is continuously in a negative pressure state, and the dust cleaning piece 18 below the target 16 is continuously in an air suction state, which can absorb the dust blown by the upper dust cleaning piece 18 to the glass surface of the target 16, and the dirt inside the second groove 203 can be discharged through the exhaust port 57.

[0078] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a second driving assembly 60 is disposed on the connecting seat 11 for driving the connecting member 13 to move, thereby detecting the target 16 .

[0079] The second driving assembly 60 includes a top frame 61 installed on the connecting seat 11, and the top of the connecting member 13 is slidably connected to the bottom of the top frame 61. The middle of the top frame 61 has an inner cavity, and the bottom frame 51, the top frame 52 and the telescopic member 53 are all located in the inner cavity of the top frame 61. A second guide rail 62 is opened on the top frame 61.

[0080] The second guide rail 62 is composed of a first transverse section, a second oblique section and a second transverse section, and the tail end of the first transverse section is connected to the bottom end of the second oblique section, the top end of the second oblique section is connected to the head end of the second transverse section, and the second transverse section is located above the first transverse section.

[0081] The second guide rail 62 is internally slidably connected with a guide column 63, and the initial position of the guide column 63 is located inside the first transverse section. The outer surface of the guide column 63 is fixed to the top of the top frame 52. A first driving source 64 is installed on one side of the top frame 61. The inner wall of the top frame 61 is rotatably connected with a first threaded screw 65, and the output end of the first driving source 64 is fixed to one end of the first threaded screw 65. An end block is fixed to one side of the connecting member 13, and the end block is threadedly connected to the first threaded screw 65. A second threaded screw 67 is threadedly connected to the top frame 61. A support arm is fixed to one side of the connecting seat 11, and the top of the second threaded screw 67 is rotatably connected to the bottom of the support arm. A second driving source 66 is installed on the support arm, and the output end of the second driving source 66 is fixed to the top of the second threaded screw 67.

[0082] Through the control system, the two second drive sources 66 can be started at the same time, and the two second threaded screws 67 can be kept rotating synchronously, and the two second threaded screws 67 rotate synchronously in the opposite direction, so as to cooperate with the first threaded screw 65 to drive the connecting member 13 to slide in a circle around the area of ​​the grating measuring device 12, and the initial position of the connecting member 13 corresponds to the first transverse section. When the connecting member 13 slides linearly or circularly, the guide column 63 slides from the first transverse section through the second oblique section to the second transverse section, and when the guide column 63 slides to the inside of the second oblique section, the top frame 52 is in an upward state. When the top frame 52 moves up to the extreme position, the guide column 63 slides from the second oblique section to the second transverse section. If the connecting member 13 is a linear sliding detection When the connecting member 13 is measured, the trajectory of the connecting member 13 slides from one end of the first threaded screw 65 to the other end thereof. If the connecting member 13 is a circular sliding detection, the trajectory of the connecting member 13 is the upper semicircle of the circle. Then the connecting member 13 slides from the other end of the first threaded screw 65 to one end for resetting, or when the connecting member 13 slides to the lower semicircle of the circle for resetting, the guide column 63 slides from the second transverse section to the second oblique section, and the connecting member 13 moves downward. When the connecting member 13 moves downward to the initial height, the guide column 63 slides through the second oblique section to the first transverse section, so that the motion trajectory of the guide column 63 before sliding into the first transverse section is measured by the grating measuring device 12 and the laser tracker 10, so as to perform measurement and calibration.

[0083] Embodiment 2

[0084] Since the connecting member 13 is in motion, it will disturb the surrounding air and form airflow, which may carry dust and floating objects in the air and make them more easily attached to the glass of the target 16. Therefore, the second embodiment is proposed to improve the performance of dust and floating objects falling off the surface of the target 16.

[0085] refer to Figure 12-16As shown, the difference between the second embodiment and the first embodiment is that an ash-flinging assembly 70 is provided inside the connecting member 13, and the ash-flinging assembly 70 includes a rotating shaft 71 rotatably connected to the inner wall of the connecting member 13, and a cross limiting groove 73 is provided in the middle of the rotating shaft 71. A cross limiting block 72 is slidably connected inside the cross limiting groove 73, and one end of the cross limiting block 72 is fixed to one side of the mounting seat 15. The cross limiting groove 73 cooperates with the cross limiting block 72 to limit the mounting seat 15, so as to maintain the stability of the mounting seat 15 when sliding laterally.

[0086] A linkage gear ring 78 is fixed to the outer surface of the rotating shaft 71, and an arc-shaped limiting groove 75 is opened on the side of the linkage gear ring 78 away from the mounting seat 15. An elastic limiting column 74 is fixed to the inner wall of the connecting piece 13, and the elastic limiting column 74 is inserted into the corresponding arc-shaped limiting groove 75. The arc-shaped limiting groove 75 cooperates with the elastic limiting column 74 to limit the rotating shaft 71, thereby maintaining the stability of the rotating shaft 71.

[0087] A connecting frame 76 is fixed to the bottom of the lifting plate 41, and a driving tooth plate 77 is slidably connected to the inner bottom wall of the connecting frame 76. A plurality of square openings are provided on the side of the connecting frame 76 facing the mounting seat 15, and the teeth of the driving tooth plate 77 are located inside the square openings. An opening 79 is provided on the connecting frame 76, and a pushing column 710 is slidably connected to the inside of the opening 79, and one end of the pushing column 710 is fixed to the side wall of the driving tooth plate 77. Two triangular guide plates 711 are fixed to the inner cavity wall of the mounting seat 15, and the two lifting plates 41 are arranged up and down.

[0088] Since the head end of the opening 79 is far away from the mounting seat 15, the tail end of the opening 79 is close to the mounting seat 15, and the initial position of the push column 710 is located at the head end of the opening 79, when the lifting plate 41 moves up and the linkage column 43 slides to the second vertical section, the push column 710 is against the bottom end of the triangular guide plate 711 located above. As the lifting plate 41 continues to move up and the linkage column 43 moves down inside the second vertical section, the push column 710 slides from the bottom end of the triangular guide plate 711 to its top end. After the lifting plate 41 moves up to the extreme position, the push column 710 slides from the head end of the opening 79 to its tail end, and the teeth of the driving tooth plate 77 slide out of the square opening. At this time, the teeth at the bottom end of the driving tooth plate 77 are located above the linkage tooth ring 78. As the lifting plate 41 moves down, the teeth of the driving tooth plate 77 will mesh with the teeth of the linkage tooth ring 78, thereby driving the mounting seat 15 to rotate inside the connecting seat 11 through the rotating shaft 71, so that the target 16 can shake off the dust and attachments attached to its surface.

[0089] When the linkage column 43 slides from the first oblique section to the bottom end of the first vertical section, the pushing column 710 presses against the top end of the triangular guide plate 711 located below it. When the linkage column 43 moves upward inside the first vertical section, the pushing column 710 slides from the top end of the triangular guide plate 711 to its bottom end, and the pushing column 710 slides from the tail end of the opening 79 to its head end. After the linkage column 43 moves upward to the extreme position inside the first vertical section, the pushing column 710 is at the bottom end of the triangular guide plate 711, and the pushing column 710 is at the head end of the opening 79, and the teeth of the driving tooth plate 77 slide into the interior of the square opening. When the rotating shaft 71 rotates, the elastic limiting column 74 can be engaged in the interior of the arc-shaped limiting groove 75 in turn, thereby maintaining the angle of adaptation between the linkage gear ring 78 and the driving tooth plate 77.

[0090] The present invention also provides a method for dynamic and static calibration of a laser tracker, comprising the following steps:

[0091] Step 1: Pull out the mounting seat 15, install the target 16 on the mounting seat 15, and then slide the mounting seat 15 into the interior of the connecting member 13;

[0092] Step 2: Turn on the second driving assembly 60, and the second driving assembly 60 drives the connecting member 13 to slide in the area of ​​the grating measuring device 12 for detection;

[0093] Step 3: When the connecting member 13 slides from one end of the second guide rail 62 to the other end thereof, the dust collecting assembly 30 cooperates with the first driving assembly 50 to make the two dust cleaning members 18 both in the suction state, so as to absorb the dust and floating objects on the surface area of ​​the target 16. When the connecting member 13 slides from the other end of the second guide rail 62 to the one end thereof to reset, the dust collecting assembly 30, the blowing assembly 40 and the first driving assembly 50 cooperate with each other, so that the dust cleaning member 18 above the mounting seat 15 is changed from the suction state to the blowing state, so that the wind can be blown toward the glass surface of the target 16, so that the dust and attached objects on the glass surface fall off, and the dust cleaning member 18 below the mounting seat 15 is continuously in the suction state, so as to absorb the fallen dust and attached objects.

[0094] Step 4: After the connecting member 13 finishes sliding, the sliding distance of the pointer 14 on the grating measuring device 12 is collected, and the results of the laser tracker 10 and the target 16 are collected and then compared, so as to calibrate the laser tracker 10.

[0095] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0096] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0097] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A dynamic and static calibration device for a laser tracker, comprising a laser tracker, characterized in that: A connecting seat is provided on one side of the laser tracker, a grating measuring device and a connecting piece are provided on the connecting seat, a pointer is provided on the connecting piece, a mounting seat is slidably connected inside the connecting piece, and a target is provided on the mounting seat; The inner wall of the mounting seat is provided with two connecting grooves, and dust cleaning pieces are arranged inside the two connecting grooves. The two dust cleaning pieces are symmetrical with the mounting seat as the center. The dust cleaning piece located above the mounting seat has an air suction state and an air blowing state, and the dust cleaning piece located below the mounting seat has an air suction state. A dust suction assembly is installed inside the connecting piece, and the dust suction assembly can put the two dust cleaning pieces in an air suction state, so as to absorb dust and attachments in the target surface area. The dust suction assembly includes a cylinder arranged on one side of the mounting seat, and the upper and lower ends of the cylinder are connected to the corresponding dust cleaning pieces with air pipes, and the outer surface of the cylinder is fixedly connected with a connecting pipe. When the connecting pipe is in a negative pressure state, the two dust cleaning pieces are in an air suction state, so as to absorb dust and attachments in the target surface area.

2. The dynamic and static calibration device of the laser tracker according to claim 1, characterized in that: The connecting member is provided with a blowing assembly inside, which can put the dust cleaning member located above the mounting seat in a blowing state, and the blowing assembly includes a lifting plate arranged inside the connecting member, a fourth groove located above the mounting seat is opened on the connecting member, and the lifting plate is slidably connected to the inside of the fourth groove, an air supply pipe is arranged on one side of the lifting plate, a fixing block is fixed to the outer surface of the air supply pipe, and a ventilation pipe is fixedly connected to the top of the connecting member; When the air supply pipe moves to the corresponding dust cleaning part, the fixed block can block the air pipe located above the mounting seat and strengthen the negative pressure inside the air pipe located below the mounting seat. After the air supply pipe moves to the corresponding dust cleaning part, the ventilation pipe is connected to the air supply pipe, and the ventilation pipe can transport gas to the interior of the air supply pipe. When the gas flows to the dust cleaning part connected thereto, the dust cleaning part located above the mounting seat can be put into a blowing state.

3. The dynamic and static calibration device of the laser tracker according to claim 2, characterized in that: The lifting plate is provided with a first guide rail, the interior of the first guide rail is slidably connected with a linkage column, the outer surface of the linkage column is fixed with a collar, and the outer surface of the top end of the air supply pipe is fixed on the inner wall of the collar; When the linkage column slides from the top end of the first guide rail to its bottom end, the linkage column drives the air supply pipe to slide through the ring, and the air supply pipe slides to the corresponding dust cleaning piece and is connected with it, so that the dust cleaning piece located above the mounting seat is in a blowing state, and the dust cleaning piece located below the mounting seat is in an air suction state. When the linkage column slides from the bottom end of the first guide rail to its top end and resets, both of the dust cleaning pieces are in the air suction state.

4. The dynamic and static calibration device of the laser tracker according to claim 3, characterized in that: The connecting member is provided with a first driving assembly, the first driving assembly comprising a bottom frame and a top frame provided on the top of the connecting member, a telescopic member being fixed between the top of the bottom frame and the bottom of the top frame; When the top frame moves up, it can drive the lifting plate to move up, so that the linkage column slides from the top end of the first guide rail to its bottom end; when the top frame moves down and resets, the lifting plate also moves down, and the linkage column slides from the bottom end of the first guide rail to its top end for reset.

5. The dynamic and static calibration device of the laser tracker according to claim 4, characterized in that: The connecting seat is provided with a second driving assembly, the second driving assembly includes a top frame installed on the connecting seat, and the top of the connecting member is slidably connected to the bottom of the top frame, a second guide rail is provided on the top frame, and a guide column is slidably connected inside the second guide rail; When the guide post slides from one end of the second guide rail to the other end thereof, the top frame is in an upward state; when the guide post slides from the other end of the second guide rail to one end thereof for restoration, the top frame changes from the upward state to the downward state.

6. The dynamic and static calibration device of the laser tracker according to claim 5, characterized in that: A dust-flinging assembly is arranged inside the connecting piece, and the dust-flinging assembly includes a rotating shaft rotatably connected to the inner wall of the connecting piece, a cross limit groove is opened in the middle of the rotating shaft, a cross limit block is slidably connected inside the cross limit groove, and one end of the cross limit block is fixed on one side of the mounting seat, and the cross limit groove cooperates with the cross limit block to limit the mounting seat.

7. The dynamic and static calibration device of the laser tracker according to claim 6, characterized in that: A linkage gear ring is fixed on the outer surface of the rotating shaft, an arc-shaped limiting groove is formed on a side of the linkage gear ring away from the mounting seat, an elastic limiting column is fixed on the inner wall of the connecting piece, and the elastic limiting column is inserted into the corresponding arc-shaped limiting groove; The arc-shaped limiting groove cooperates with the elastic limiting column to limit the rotating shaft, thereby maintaining the stability of the rotating shaft.

8. The dynamic and static calibration device of the laser tracker according to claim 7, characterized in that: A connecting frame is fixed at the bottom of the lifting plate, and a driving tooth plate is slidably connected to the inner bottom wall of the connecting frame. A plurality of square openings are opened on one side of the connecting frame facing the mounting seat, and the teeth of the driving tooth plate are located inside the square openings.

9. The dynamic and static calibration device of the laser tracker according to claim 8, characterized in that: A pushing column is fixed to one side wall of the driving tooth plate, an opening is opened on the connecting frame, the pushing column is slidably connected to the inside of the opening, four triangular guide plates are fixed to the inner cavity wall of the connecting piece, and the four triangular guide plates are grouped in pairs, and the two groups of triangular guide plates are symmetrical with the lifting plate as the center, and the two triangular guide plates in each group are arranged up and down.

10. A method for dynamic and static calibration of a laser tracker, using a dynamic and static calibration device for a laser tracker as claimed in the above claims, characterized in that: The steps include: Step 1: Pull out the mounting base, install the target on the mounting base, and then slide the mounting base into the interior of the connector; Step 2: Turn on the second driving component, and drive the connecting member to slide in the area of ​​the grating measuring device for detection through the second driving component; Step 3: When the connecting member slides from one end of the second guide rail to the other end thereof, both dust cleaning members are in the suction state; when the connecting member slides from the other end of the second guide rail to the one end thereof to reset, the dust cleaning member above the mounting seat is in the blowing state, and the dust cleaning member below the mounting seat is in the suction state; Step 4: After the sliding of the connecting piece is completed, the distance that the pointer slides on the grating measuring device is collected, and the results of the laser tracker and the target are collected at the same time, and then compared to calibrate the laser tracker.

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