Laser tracker calibration device and method

Abstract

The present application provides a laser tracker calibration device and method, comprising: a first mounting platform and a second mounting platform slidably connected along a first direction, the first mounting platform and the second mounting platform being slidably connected along the first direction; a laser tracker, an interferometer, a first mounting frame, and a second mounting frame being sequentially arranged on the first mounting platform along the first direction, the first mounting frame and the second mounting frame both being slidably connected to the first mounting platform along the second direction, the first direction and the second direction being mutually perpendicular horizontal directions, the first mounting frame being mounted with a target mirror and an interferometer, and the second mounting frame being rotatably mounted with a reflector; a third mounting frame being arranged on the second mounting platform, the third mounting frame being slidably connected to the second mounting platform along the second direction, and the third mounting frame being mounted with a pentaprism. The laser tracker calibration device and method provided in the present application have a simple structure, are easy to operate, can quickly adjust the optical path length and reflective position, meet different calibration requirements of the laser tracker, and have high accuracy.

Description

Technical Field

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

[0002] Laser tracker is a new type of large-scale spatial three-dimensional coordinate measuring instrument developed in recent years. It can perform real-time tracking and measurement of spatial points. It has the characteristics of high precision, high efficiency, portability and simple operation. It is currently the main means of precise measurement of large-scale spatial three-dimensional coordinates. The basic working principle of the laser tracker is that the measuring beam emitted by the laser is divided into two beams by the interference spectrometer. One beam is directly transmitted to the interferometer, and the other beam is emitted to the target reflector through the tracking mirror. The light reflected by the target reflector returns parallel to the original beam. After reaching the spectrometer, part of the laser beam is emitted to the spot position sensor, and the other part of the beam directly enters the dual-frequency laser interferometer through the interference spectrometer for displacement interference measurement. When the target reflector moves, the tracking head adjusts the beam direction to align with the reflector in real time to measure the spatial distance.

[0003] Calibration of laser trackers is extremely important. Existing laser tracker calibration devices are mostly fixed in length and width, and the overall size of the device cannot be adjusted according to the requirements of the calibration work. For example, calibration work for different optical path lengths and different reflection positions cannot be performed, and the practicality is poor. Therefore, a laser tracker calibration device that can be easily adjusted is urgently needed. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a laser tracker calibration device and method to solve the above technical problems.

[0005] In a first aspect of the present application, a laser tracker calibration device is provided, comprising: a first mounting platform and a second mounting platform arranged along a first direction, the first mounting platform and the second mounting platform being slidably connected along the first direction; a laser tracker, an interferometer, a first mounting frame and a second mounting frame are sequentially arranged on the first mounting platform along the first direction, the first mounting frame and the second mounting frame are both slidably connected to the first mounting platform along the second direction, the first direction and the second direction are horizontal directions perpendicular to each other, the first mounting frame is equipped with a target mirror and an interferometer, and the second mounting frame is rotatably equipped with a reflector; a third mounting frame is provided on the second mounting platform close to the second mounting frame, the third mounting frame is slidably connected to the second mounting platform along the second direction, and the third mounting frame is equipped with a pentaprism.

[0006] Furthermore, the first mounting platform includes a first bracket and a first top plate fixed on the first bracket, the second mounting platform includes a second bracket and a second top plate fixed on the second bracket, and universal wheels are provided at the bottom of the first bracket and the second bracket.

[0007] Furthermore, a first slot facing the first direction is provided at the bottom of the first top plate, a first plugging plate engaged with the first slot is provided at the bottom of the side wall of the second top plate, a cavity is provided in the middle of the first plugging plate, a first threaded rod facing the first direction is provided in the cavity, a ring is provided in the first slot, the ring is sleeved on the first threaded rod and threadedly connected to the first threaded rod, an adjusting wheel and an adjusting motor are provided in the first top plate, the adjusting wheel is engaged with the ring, and the adjusting motor is used to control the rotation of the adjusting wheel, drive the rotation of the ring, and then drive the second mounting platform to slide along the first direction.

[0008] Furthermore, the first plug board is provided with limit bars on two opposite sides along the second direction, the limit bars are arranged toward the first direction, and the first slot is provided with limit grooves matching the limit bars on two opposite sides along the second direction.

[0009] Furthermore, the first top plate is provided with second slots on two opposite sides along the second direction, the second slots are arranged toward the first direction, the side wall of the second top plate is provided with a second plug-in plate that is plugged into the second slots one by one, and the outer wall of the second plug-in plate is provided with scale lines.

[0010] Furthermore, the first bracket is provided with a guide hole facing the first direction, the second bracket is provided with a guide rod cooperating with the guide hole, the side wall of the guide hole is provided with a threaded hole, and a positioning bolt is provided in the threaded hole.

[0011] Furthermore, the top of the first top plate and the second top plate are each provided with an adjustment cavity, the adjustment cavity is set toward the second direction, and a second threaded rod is rotatably provided inside, and the bottom of the first mounting bracket, the second mounting bracket and the third mounting bracket are each provided with a slider, the slider is sleeved on the second threaded rod and threadedly connected to the second threaded rod, and a turntable is fixed to one end of the second threaded rod, and the turntable is used to rotate so that the second threaded rod rotates synchronously, driving the slider to slide along the second direction, and then driving the first mounting bracket, the second mounting bracket or the third mounting bracket to slide along the second direction.

[0012] Furthermore, the reflector is mounted in the second mounting bracket for rotation around the second direction, an adjustment disk is provided at one end of the reflector, a groove is provided on the second mounting bracket, the adjustment disk is embedded in the groove, and the adjustment disk is used to rotate to drive the reflector to rotate.

[0013] Furthermore, a fixing rod is provided on the edge of the adjustment disk, one end of the fixing rod is connected to a fixing bolt, and a scale ring is provided on a side of the second mounting bracket close to the reflector.

[0014] A second aspect of the present application provides a laser tracker calibration method, using the laser tracker calibration device described in the first aspect above, the method comprising: adjusting the distance between the first mounting platform and the second mounting platform to a preset distance; rotating the reflector to a preset angle; adjusting the first mounting bracket, the second mounting bracket, and the third mounting bracket to preset positions; starting the laser tracker so that the laser emitted by it passes through the reflector and the pentaprism in sequence to reach the target mirror, thereby obtaining first length measurement data; starting the interferometer so that the light emitted by it passes through the interferometer to reach the pentaprism, thereby obtaining second length measurement data; and calibrating the laser tracker based on the first length measurement data and the second length measurement data.

[0015] As can be seen from the above description, the present application provides a laser tracker calibration device and method. By providing a first mounting platform and a second mounting platform that are slidably connected along a first direction, the overall length of the device can be adjusted so as to achieve calibration work of different optical path lengths for the laser tracker; by providing a first mounting frame and a second mounting frame that are slidably connected to the first mounting platform along a second direction, and providing a third mounting frame that is slidably connected to the second mounting platform along the second direction, the first mounting frame is used to install a target mirror and an interferometer, the second mounting frame is used to install a reflector, and the third mounting frame is used to install a pentaprism, so that the device can adjust the reflection position along the second direction so as to achieve calibration work of different reflection positions for the laser tracker; the laser tracker calibration device and method have a simple structure, easy operation, can quickly adjust the optical path length and reflection position, meet different calibration work requirements for the laser tracker, and have high calibration accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a schematic structural diagram of a laser tracker calibration device according to an embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the structure of the first top plate and the second top plate in the embodiment of the present application;

[0019] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at B in the middle;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the first top plate in an embodiment of the present application;

[0022] Figure 6 This is a schematic diagram of the structure of the cooperation between the first bracket and the second bracket in an embodiment of the present application;

[0023] Figure 7 Schematic diagram of the optical path propagation of the laser tracker calibration device in an embodiment of the present application.

[0024] Reference numerals: 1, first mounting platform; 1-1, first bracket; 1-2, first top plate; 1-3, first slot; 1-4, collar; 1-5, adjusting wheel; 1-6, limiting slot; 1-7, guide hole; 1-8, positioning bolt; 1-9, second slot; 2, second mounting platform; 2-1, second bracket; 2-2, second top plate; 2-3, first plug plate; 2-4, cavity; 2-5, first threaded rod; 2-6, limiting strip; 2 -7. Guide rod; 2-8. Second plug-in plate; 3. Laser tracker; 4. Interferometer; 5. First mounting bracket; 6. Second mounting bracket; 6-1. Groove; 6-2. Scale ring; 7. Target mirror; 8. Interferometer; 9. Reflector; 10. Third mounting bracket; 11. Pentaprism; 12. Universal wheel; 13. Adjustment chamber; 14. Second threaded rod; 15. Slider; 16. Turntable; 17. Adjustment disk; 18. Fixing rod; 19. Fixing bolt. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0026] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] Laser tracker is a new type of large-scale spatial three-dimensional coordinate measuring instrument developed in recent years. It can perform real-time tracking and measurement of spatial points. It has the characteristics of high precision, high efficiency, portability and simple operation. It is currently the main means of precise measurement of large-scale spatial three-dimensional coordinates. The basic working principle of the laser tracker is that the measuring beam emitted by the laser is divided into two beams by the interference spectrometer. One beam is directly transmitted to the interferometer, and the other beam is emitted to the target reflector through the tracking mirror. The light reflected by the target reflector returns parallel to the original beam. After reaching the spectrometer, part of the laser beam is emitted to the spot position sensor, and the other part of the beam directly enters the dual-frequency laser interferometer through the interference spectrometer for displacement interference measurement. When the target reflector moves, the tracking head adjusts the beam direction to align with the reflector in real time to measure the spatial distance.

[0028] Calibration of laser trackers is extremely important. Existing laser tracker calibration devices are mostly fixed in length and width, and the overall size of the device cannot be adjusted according to the requirements of the calibration work. For example, calibration work for different optical path lengths and different reflection positions cannot be performed, and the practicality is poor. Therefore, a laser tracker calibration device that can be easily adjusted is urgently needed.

[0029] Below, through specific embodiments and combined Figures 1 to 7 To describe the technical solution of this application in detail.

[0030] Some embodiments of the present application provide a laser tracker calibration device, such as Figure 1As shown, it includes a first mounting platform 1 and a second mounting platform 2. A laser tracker 3 and an interferometer 4 are respectively installed at one end of the top of the first mounting platform 1. An adjustment cavity 13 is opened at the top of the first mounting platform 1 and the second mounting platform 2. A mounting frame is slidably arranged in the adjustment cavity 13. The mounting frame includes a first mounting frame 5, a second mounting frame 6 and a third mounting frame 10. The first mounting frame 5 is respectively provided with a target mirror 7 and an interferometer 8 from top to bottom. A plurality of reflectors 9 are equidistantly rotated on the second mounting frame 6 in the middle section. A semicircular The annular scale ring 6-2 is engraved with an angle to facilitate adjustment of the angle of the reflector 9 in the subsequent work process. A pentaprism 11 is equidistantly installed on the third mounting frame 10 at the top of the second mounting platform 2. The second mounting platform 2 is symmetrically fixed with a second plug-in plate 2-8 at one end close to the first mounting platform 1. Second slots 1-9 are symmetrically opened on both sides of the first mounting platform 1. The second plug-in plate 2-8 is plugged into the second slots 1-9. The vertical section of the second plug-in plate 2-8 is convex, and scale lines are engraved on the outer side of the second plug-in plate 2-8.

[0031] The laser tracker calibration device is provided with a first mounting platform 1 and a second mounting platform 2. The position of the second mounting platform 2 can be conveniently adjusted through the cooperation among the first plug-in plate 2-3, the first threaded rod 2-5, the adjusting wheel 1-5, and the collar 1-4. Thus, during the measurement process, the position of the second mounting platform 2 can be adjusted to different positions according to the needs of the experiment itself, thereby ensuring the smooth progress of subsequent work; through the cooperation among the second threaded rod 14, the slider 15 and the turntable 16, the position of the mounting frame can be conveniently adjusted according to the different reflection positions of the light path during the work process, thereby facilitating subsequent adjustments by the staff.

[0032] In some embodiments, as Figure 2 and Figure 3 As shown, an adjustment component for assisting the adjustment of the mounting frame is provided in the adjustment cavity 13, and the adjustment component includes a second threaded rod 14 rotatably set in the adjustment cavity 13, and a slider 15 is protrudingly provided at the bottom of the mounting frame. The slider 15 is sleeved and installed on the second threaded rod 14, and the second threaded rod 14 and the slider 15 are threadedly engaged with each other, and a turntable 16 is fixed to one end of the second threaded rod 14.

[0033] By rotating the turntable 16, the turntable 16 drives the second threaded rod 14 to rotate, thereby adjusting the position of the mounting bracket. In actual work, the position of the mounting bracket can be conveniently adjusted according to the different reflection positions of the light path, thereby facilitating operation by the staff.

[0034] In some embodiments, an adjustment component for adjusting the auxiliary reflector 9 is provided on one side of the second mounting frame 6, and the adjustment component includes an adjustment disk 17, a fixing rod 18 is fixed at the outer edge of the adjustment disk 17, and a fixing bolt 19 is provided on the fixing rod 18, and the fixing rod 18 and the fixing bolt 19 are threadedly engaged.

[0035] By rotating the adjustment disk 17 and adjusting the angle of the reflector 9, the light passing through can be reflected vertically. The reflector 9 is initially in a horizontal state and is adjusted to a state tilted to the right by the adjustment disk 17, so that the light path propagation can be completed.

[0036] In some embodiments, as Figure 2 、 Figure 4 and Figure 5 As shown, a first plugboard 2-3 is horizontally fixed at the bottom of one end of the second mounting platform 2 close to the first mounting platform 1, a first slot 1-3 for the first plugboard 2-3 to be plugged in is opened at the bottom of the first mounting platform 1, a cavity 2-4 is opened at the middle section of the first plugboard 2-3, a first threaded rod 2-5 is arranged in the cavity 2-4, the first threaded rod 2-5 is passed through and installed in the first slot 1-3, a collar 1-4 is rotatably arranged in the first slot 1-3, the first threaded rod 2-5 and the collar 1-4 are threadedly matched, an adjusting wheel 1-5 is rotatably arranged inside the first mounting platform 1, an adjusting motor for driving the adjusting wheel 1-5 to rotate is installed in the first mounting platform 1, and the adjusting wheel 1-5 and the collar 1-4 are meshed for transmission.

[0037] By arranging the cooperation between the collar 1-4, the adjusting wheel 1-5 and the first threaded rod 2-5, the position of the second mounting platform 2 can be conveniently adjusted during the work process, so that during the measurement process, the position of the second mounting platform 2 can be adjusted to different positions according to the needs of its own experiment, thereby ensuring the smooth progress of subsequent work.

[0038] In some embodiments, limit bars 2-6 are symmetrically protruded on both sides of the first plug board 2-3, and limit slots 1-6 are symmetrically opened in the first slot 1-3. The limit bars 2-6 and the limit slots 1-6 cooperate and slide with each other. Through the cooperation between the set limit bars 2-6 and the limit slots 1-6, the first plug board 2-3 can be stably snapped into the first slot 1-3 during operation.

[0039] In some embodiments, as Figure 2 and Figure 6As shown, the first mounting platform 1 is composed of a first top plate 1-2 and a first bracket 1-1, the first bracket 1-1 is a rectangular frame-shaped bracket, and the second mounting platform 2 is composed of a second top plate 2-2 and a second bracket 2-1. Universal wheels 12 are installed at the bottom of the first bracket 1-1 and the second bracket 2-1. A guide rod 2-7 is horizontally fixed on the side of the second bracket 2-1 close to the first bracket 1-1. The guide rod 2-7 is installed on the first bracket 1-1, and a positioning bolt 1-8 is rotatably provided on the outer side of the first bracket 1-1. The first bracket 1-1 and the positioning bolt 1-8 are threadedly matched, and one end of the positioning bolt 1-8 is placed on the outer side of the guide rod 2-7.

[0040] During the working process, the positions of the first mounting platform 1 and the second mounting platform 2 are adjusted as needed, so as to facilitate the device to be adjusted to the corresponding length in the subsequent working process to adapt to different measurement requirements.

[0041] Some embodiments of the present application provide a laser tracker calibration device, such as Figure 1 As shown, it includes: a first mounting platform 1 and a second mounting platform 2 arranged along a first direction, and the first mounting platform 1 and the second mounting platform 2 are slidably connected along the first direction; a laser tracker 3, an interferometer 4, a first mounting frame 5 and a second mounting frame 6 are sequentially arranged on the first mounting platform 1 along the first direction, and the first mounting frame 5 and the second mounting frame 6 are both slidably connected to the first mounting platform 1 along the second direction, and the first direction and the second direction are horizontal directions perpendicular to each other, the first mounting frame 5 is installed with a target mirror 7 and an interferometer 8, and the second mounting frame 6 is rotatably installed with a reflector 9; a third mounting frame 10 is provided on the second mounting platform 2 close to the second mounting frame 6, and the third mounting frame 10 is slidably connected to the second mounting platform 2 along the second direction, and the third mounting frame 10 is installed with a pentaprism 11.

[0042] The interferometer 4 is, for example, a dual-frequency interferometer; the reflector 9 and the target mirror 7 are, for example, plane mirrors; Figure 1 As shown, there can be multiple interferometers 8, for example, two; there can be multiple reflectors 9, for example, four, for reflecting light vertically; there can be multiple pentaprisms 11, for example, two, and there is no specific limitation.

[0043] L1 is the first direction, L2 is the second direction, such as Figure 7 As shown, a laser tracker 3, an interferometer 4, a target mirror 7, an interferometer 8, a reflector 9, and a pentaprism 11 are arranged in sequence along the first direction; the laser emitted by the laser tracker 3 is reflected by the reflector 9, and then reflected by the pentaprism 11 to reach the target mirror 7, while the light emitted by the interferometer 4 passes through the interferometer 8 directly to the pentaprism 11.

[0044] By providing a first mounting platform 1 and a second mounting platform 2 that are slidably connected along a first direction, the overall length of the device can be adjusted, so that the optical path length can be adjusted to achieve calibration of the laser tracker 3 with different optical path lengths.

[0045] By setting a first mounting frame 5 and a second mounting frame 6 that are slidably connected to the first mounting platform 1 along the second direction, and setting a third mounting frame 10 that is slidably connected to the second mounting platform 2 along the second direction, the first mounting frame 5 is used to install the target mirror 7 and the interferometer 8, the second mounting frame 6 is used to install the reflector 9, and the third mounting frame 10 is used to install the pentaprism 11, so that the target mirror 7, the interferometer 8, the reflector 9 and the pentaprism 11 can all slide along the second direction, that is, the device can adjust the reflective position along the second direction, so as to realize the calibration of different reflective positions of the laser tracker 3.

[0046] The reflector 9 is rotatably connected to the second mounting bracket 6 , and the angle of the reflector 9 can be adjusted to achieve complete propagation of the light path.

[0047] The laser tracker calibration device has a simple structure and is easy to operate. It can quickly adjust the optical path length and the reflection position to meet different calibration work requirements of the laser tracker 3 and has high calibration accuracy.

[0048] In some embodiments, as Figure 2 and Figure 6 As shown, the first mounting platform 1 includes a first bracket 1-1 and a first top plate 1-2 fixed on the first bracket 1-1, and the second mounting platform 2 includes a second bracket 2-1 and a second top plate 2-2 fixed on the second bracket 2-1, and universal wheels 12 are provided at the bottom of the first bracket 1-1 and the second bracket 2-1.

[0049] The first bracket 1-1 and the second bracket 2-1 are, for example, rectangular brackets, which are not specifically limited. There are, for example, multiple universal wheels 12, which can be set at the corners of the first bracket 1-1 and the second bracket 2-1 to facilitate the movement of the first mounting platform 1 and the second mounting platform 2.

[0050] In some embodiments, as Figure 2 、 Figure 4 and Figure 5As shown, a first slot 1-3 facing the first direction is provided at the bottom of the first top plate 1-2, a first plugging plate 2-3 which is plugged into and matched with the first slot 1-3 is provided at the bottom of the side wall of the second top plate 2-2, a cavity 2-4 is provided in the middle of the first plugging plate 2-3, a first threaded rod 2-5 facing the first direction is provided in the cavity 2-4, a ring 1-4 is provided in the first slot 1-3, the ring 1-4 is sleeved on the first threaded rod 2-5 and is threadedly connected to the first threaded rod 2-5, an adjusting wheel 1-5 and an adjusting motor are provided in the first top plate 1-2, the adjusting wheel 1-5 is engaged with the ring 1-4, and the adjusting motor is used to control the rotation of the adjusting wheel 1-5, drive the rotation of the ring 1-4, and then drive the second mounting platform 2 to slide along the first direction.

[0051] The first slot 1-3 is, for example, a rectangular slot, and the first plugboard 2-3 is, for example, a rectangular plugboard, which is not specifically limited. The first plugboard 2-3 and the first slot 1-3 are plugged in and matched to play a limiting role, improve the stability of the device, and also provide a basis for sliding connection; the first plugboard 2-3 is provided with a cavity 2-4 facing the first direction, and a first threaded rod 2-5 is provided in the cavity 2-4. A ring 1-4 is embedded in the first slot 1-3, and the ring 1-4 is threadedly matched with the first threaded rod 2-5. An adjusting wheel 1-5 is embedded in the first top plate 1-2, and the adjusting wheel 1-5 is meshed with the outer wall of the ring 1-4. An adjusting motor is also provided in the first top plate 1-2, and the adjusting motor is used to control the rotation of the adjusting wheel 1-5, drive the ring 1-4 to rotate, and then drive the second mounting platform 2 to slide along the first direction. By controlling the forward or reverse rotation of the adjusting motor, the reciprocating motion of the second mounting platform 2 can be achieved; the first plugboard 2-3 is arranged horizontally, which can reduce the occupied space, facilitate processing, and ensure the stability of the device.

[0052] In some embodiments, as Figure 4 and Figure 5 As shown, the first plug board 2-3 is provided with limit bars 2-6 on both sides opposite to each other along the second direction, and the limit bars 2-6 are set toward the first direction, and the first slot 1-3 is provided with limit grooves 1-6 that cooperate with the limit bars 2-6 on both sides opposite to each other along the second direction.

[0053] The first plug-in board 2-3 is provided with limit bars 2-6 on two sides opposite to each other along the second direction, and the limit bars 2-6 are arranged toward the first direction. The first slot 1-3 is provided with limit grooves 1-6 on two sides opposite to each other along the second direction, and the limit grooves 1-6 that cooperate with the limit bars 2-6 are provided. By providing the limit grooves 1-6 and the limit bars 2-6 for plugging and fitting, the cooperation between the first plug-in board 2-3 and the second plug-in board 2-8 can be made more stable, thereby preventing the first plug-in board 2-3 from falling off from the first slot 1-3.

[0054] In some embodiments, as Figure 2 and Figure 5 As shown, the first top plate 1-2 is provided with second slots 1-9 on two opposite sides along the second direction, and the second slots 1-9 are arranged toward the first direction. The side walls of the second top plate 2-2 are provided with second plug-in plates 2-8 that are plugged in one-to-one with the second slots 1-9, and the outer walls of the second plug-in plates 2-8 are provided with scale lines.

[0055] The second slot 1-9 is, for example, a convex slot, and the second plug-in board 2-8 is, for example, a convex plug-in board, and there is no specific limitation. The second slot 1-9 and the second plug-in board 2-8 are plugged together to play a limiting role, thereby improving the stability of the device and preventing the second plug-in board 2-8 from falling off from the second slot 1-9; the outer wall of the second plug-in board 2-8 is provided with scale lines, which is convenient for reading the distance between the first mounting platform 1 and the second mounting platform 2; the second plug-in board 2-8 is vertically arranged, which is convenient for displaying the scale and can increase the limiting area along the second direction.

[0056] In some embodiments, as Figure 6 As shown, the first bracket 1-1 is provided with a guide hole 1-7 facing the first direction, the second bracket 2-1 is provided with a guide rod 2-7 cooperating with the guide hole 1-7, the side wall of the guide hole 1-7 is provided with a threaded hole, and a positioning bolt 1-8 is provided in the threaded hole.

[0057] The guide rods 2-7 are, for example, two groups, which are not specifically limited. The guide rods 2-7 pass through the guide holes 1-7 to play a limiting role, ensuring the stability of the first bracket 1-1 and the second bracket 2-1. The side walls of the guide holes 1-7 are provided with threaded holes, and the threaded holes are provided with positioning bolts 1-8. By rotating the positioning bolts 1-8 to abut against the guide rods 2-7, the movement of the guide rods 2-7 can be limited, thereby fixing the distance between the first bracket 1-1 and the second bracket 2-1.

[0058] In some embodiments, an adjustment cavity 13 is provided at the top of the first top plate 1-2 and the second top plate 2-2, and the adjustment cavity 13 is set toward the second direction. A second threaded rod 14 is rotatably provided inside. A slider 15 is provided at the bottom of the first mounting frame 5, the second mounting frame 6 and the third mounting frame 10. The slider 15 is sleeved on the second threaded rod 14 and threadedly connected to the second threaded rod 14. A turntable 16 is fixed to one end of the second threaded rod 14, and the turntable 16 is used to rotate so that the second threaded rod 14 rotates synchronously, driving the slider 15 to slide along the second direction, and then driving the first mounting frame 5, the second mounting frame 6 or the third mounting frame 10 to slide along the second direction.

[0059] An adjusting chamber 13 is provided to provide space for a sliding connection, and a second threaded rod 14 is provided in the adjusting chamber 13 to rotate about a second direction, and a slider 15 is provided on the second threaded rod 14. The slider 15 is threadedly connected to the second threaded rod 14 and abuts against the adjusting chamber 13. The top of the slider 15 is connected to the first mounting bracket 5, the second mounting bracket 6 or the third mounting bracket 10; a turntable 16 is fixed to one end of the second threaded rod 14, and by rotating the turntable 16, the second threaded rod 14 can be driven to rotate synchronously, driving the slider 15 to slide along the second direction, and then driving the first mounting bracket 5, the second mounting bracket 6 or the third mounting bracket 10 to slide, and the reciprocating motion of the mounting bracket is realized by the forward and reverse rotation of the turntable 16.

[0060] In some embodiments, as Figure 2 and Figure 3 As shown, the reflector 9 is mounted in the second mounting frame 6 so as to rotate around the second direction. An adjustment disk 17 is provided at one end of the reflector 9. A groove 6-1 is provided on the second mounting frame 6. The adjustment disk 17 is embedded in the groove 6-1. The adjustment disk 17 is used to rotate to drive the reflector 9 to rotate.

[0061] The reflector 9 is rotatably mounted on the second mounting frame 6. An adjustment disk 17 is provided at one end of the reflector 9. The adjustment disk 17 is embedded in one side of the second mounting frame 6. By rotating the adjustment disk 17, the reflector 9 can be driven to rotate so as to adjust the angle of the reflector 9. The adjustment disk 17 abuts against the side wall of the groove 6-1. The rotation position of the reflector 9 can be limited by the friction between the adjustment disk 17 and the groove 6-1.

[0062] In some embodiments, as Figure 2 and Figure 3 As shown, a fixing rod 18 is provided on the edge of the adjusting disk 17 , one end of the fixing rod 18 is connected to a fixing bolt 19 , and a scale ring 6 - 2 is provided on the side of the second mounting frame 6 close to the reflector 9 .

[0063] A fixing rod 18 is provided on the edge of the adjusting disk 17, and the adjusting disk 17 can be driven to rotate by applying force to the fixing rod 18; one end of the fixing rod 18 is connected to a fixing bolt 19, which is convenient for personnel to grasp; a scale ring 6-2 is provided on the side of the second mounting frame 6 close to the reflector 9, which is convenient for reading the rotation angle of the reflector 9.

[0064] In some embodiments of the present application, a laser tracker calibration method is provided, using the laser tracker calibration device as described in any of the above embodiments, the method comprising:

[0065] S1. Adjust the distance between the first mounting platform 1 and the second mounting platform 2 to a preset distance.

[0066] Start the adjusting motor, and the adjusting motor drives the adjusting wheel 1-5 to rotate. The adjusting wheel 1-5 and the collar 1-4 are meshed for transmission, and the first threaded rod 2-5 and the collar 1-4 are threadedly matched, so that the position of the first threaded rod 2-5 is changed, and the second mounting platform 2 is moved, thereby adjusting the distance between the first mounting platform 1 and the second mounting platform 2 to a preset distance. The preset distance is, for example, 0mm to 1000mm, and there is no specific limitation; after moving to the preset distance, rotate the positioning bolt 1-8, and the first bracket 1-1 is threadedly matched with the positioning bolt 1-8, so that one end of the positioning bolt 1-8 is pressed against the outer edge of the guide rod 2-7 for limiting.

[0067] S2. Rotate the reflector 9 to a preset angle.

[0068] The adjusting disk 17 is rotated, and the adjusting disk 17 drives the reflector 9 to rotate, and the reflector 9 is adjusted to a preset angle. The preset angle is, for example, 0° to 360°, and is not specifically limited.

[0069] S3. Adjust the first mounting bracket 5, the second mounting bracket 6, and the third mounting bracket 10 to preset positions.

[0070] The turntable 16 is rotated, and the turntable 16 drives the second threaded rod 14 to rotate. The second threaded rod 14 is threadedly engaged with the slider 15, thereby moving the position of the slider 15 and moving the corresponding mounting bracket to a preset position. The preset position is, for example, facing the laser tracker 3, and the specific position is not limited.

[0071] S4. Start the laser tracker 3 so that the laser light it emits passes through the reflector 9 and the pentaprism 11 in sequence and reaches the target mirror 7 to obtain the first length measurement data.

[0072] like Figure 7 As shown, the reflectors 9 are the first reflector, the second reflector, the third reflector, and the fourth reflector from bottom to top, and the pentaprisms 11 are the first pentaprism and the second pentaprism from bottom to top. The outgoing light beam of the laser tracker 3 is reflected by the second reflector and the first reflector in sequence and emitted horizontally, then reflected by the first pentaprism and the second pentaprism in sequence and emitted horizontally, then emitted horizontally after passing through the third reflector and the fourth reflector, and is aimed at the target mirror 7. After reflection, it returns to the tracking system inside the laser tracker 3 along the original path to obtain the first length measurement data. The first length measurement data includes measurement indications d, α and β, d is the light beam distance between the first mounting bracket 5 and the second mounting bracket 6, α is the light beam distance between the second mounting bracket 6 and the edge of the pentaprism 11, and β is the horizontal light beam distance inside the pentaprism 11.

[0073] S5. Start the interferometer 4 so that the light it emits passes through the interferometer 8 and reaches the pentaprism 11 to obtain second length measurement data.

[0074] After the light emitted by the interferometer 4 is transmitted to the pentaprism 11 , the optical path is measured to obtain the second length measurement data W, that is, the distance between the first mounting bracket 5 and the pentaprism 11 .

[0075] S6. Calibrate the laser tracker 3 according to the first length measurement data and the second length measurement data.

[0076] Theoretically, the two sets of length measurement data should be equal, that is, W = d + α + β. By adjusting the interferometer 4, the laser tracker 3 can be calibrated so that W is equal to the sum of d, α and β, thereby reducing the error.

[0077] In some embodiments, the measurement readings d1, α1 and β1 of the laser tracker 3 of the second mounting platform 2 at the initial position P1 and the measurement reading W1 of the interferometer 4 can also be tested. After adjusting the interferometer 4 so that W1 = d1 + α1 + β1, the second mounting platform 2 is moved to PN. During the movement, the target mirror 7 is returned to the nest to cut off the light. After positioning, the target mirror 7 is reset to resume the light. In this way, the stimulation to the laser tracker 3 and the interferometer 4 is reduced during the movement so that they maintain the best working state. Then, the reading errors of the laser tracker 3 and the interferometer 4 are recorded to obtain the degree to which the light is affected by the surrounding environment under different optical path lengths.

[0078] In some embodiments, the positions of the first mounting bracket 5, the second mounting bracket 6 and the third mounting bracket 10 can also be adjusted, for example, moved to the left or right at the same time, and the errors of the laser tracker 3 and the interferometer 4 at different reflecting positions can be compared to obtain the degree to which the light at different reflecting positions is affected by the surrounding environment.

[0079] The description of this application is provided for purposes of illustration and description and is not intended to be exhaustive or to limit the application to the disclosed form. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the application and to enable those skilled in the art to understand the application and design various embodiments with various modifications suitable for specific applications.

[0080] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the present application, the technical features of the above embodiments or different embodiments may also be combined, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

Claims

1. A laser tracker calibration device, characterized in that: include: A first mounting platform and a second mounting platform are arranged along a first direction, wherein the first mounting platform and the second mounting platform are slidably connected along the first direction; The first mounting platform is provided with a laser tracker, an interferometer, a first mounting bracket, and a second mounting bracket in sequence along the first direction. The first mounting bracket and the second mounting bracket are both slidably connected to the first mounting platform along the second direction. The first direction and the second direction are horizontal directions perpendicular to each other. The first mounting bracket is provided with a target mirror and an interferometer. The second mounting bracket is rotatably provided with a reflector. An adjustment component for assisting in adjusting the reflector is provided on one side of the second mounting bracket. A third mounting frame close to the second mounting frame is provided on the second mounting platform. The third mounting frame is slidably connected to the second mounting platform along the second direction. A pentaprism is installed on the third mounting frame.

2. The laser tracker calibration device according to claim 1, characterized in that: The first mounting platform includes a first bracket and a first top plate fixed on the first bracket, and the second mounting platform includes a second bracket and a second top plate fixed on the second bracket. Universal wheels are provided at the bottom of the first bracket and the second bracket.

3. The laser tracker calibration device according to claim 2, characterized in that: A first slot facing the first direction is provided at the bottom of the first top plate, a first plugging plate engaged with the first slot is provided at the bottom of the side wall of the second top plate, a cavity is provided in the middle of the first plugging plate, a first threaded rod facing the first direction is provided in the cavity, a ring is provided in the first slot, the ring is sleeved on the first threaded rod and threadedly connected to the first threaded rod, an adjusting wheel and an adjusting motor are provided in the first top plate, the adjusting wheel is engaged with the ring, and the adjusting motor is used to control the rotation of the adjusting wheel, drive the rotation of the ring, and then drive the second mounting platform to slide along the first direction.

4. The laser tracker calibration device according to claim 3, characterized in that: The first plug board is provided with limiting strips on two opposite sides along the second direction, and the limiting strips are arranged toward the first direction. The first slot is provided with limiting grooves matching the limiting strips on two opposite sides along the second direction.

5. The laser tracker calibration device according to claim 2, characterized in that: The first top plate is provided with second slots on two opposite sides along the second direction, and the second slots are arranged toward the first direction. The side wall of the second top plate is provided with a second plug-in plate that is plugged into the second slots one by one, and the outer wall of the second plug-in plate is provided with scale lines.

6. The laser tracker calibration device according to claim 2, characterized in that: The first bracket is provided with a guide hole facing the first direction, the second bracket is provided with a guide rod matched with the guide hole, the side wall of the guide hole is provided with a threaded hole, and a positioning bolt is provided in the threaded hole.

7. The laser tracker calibration device according to claim 2, characterized in that: The top of each of the first top plate and the second top plate is provided with an adjustment cavity, the adjustment cavity is set toward the second direction, and a second threaded rod is rotatably provided inside the adjustment cavity. The bottom of each of the first mounting bracket, the second mounting bracket and the third mounting bracket is provided with a slider, the slider is sleeved on the second threaded rod and threadedly connected to the second threaded rod, and a turntable is fixed to one end of the second threaded rod, and the turntable is used to rotate so that the second threaded rod rotates synchronously, driving the slider to slide along the second direction, and then driving the first mounting bracket, the second mounting bracket or the third mounting bracket to slide along the second direction.

8. The laser tracker calibration device according to claim 2, characterized in that: The reflector is mounted in the second mounting bracket for rotation around the second direction. An adjustment disk is provided at one end of the reflector. A groove is provided on the second mounting bracket. The adjustment disk is embedded in the groove. The adjustment disk is used to rotate to drive the reflector to rotate.

9. The laser tracker calibration device according to claim 8, characterized in that: A fixing rod is provided at the edge of the adjusting disk, one end of the fixing rod is connected with a fixing bolt, and a scale ring is provided on a side of the second mounting frame close to the reflector.

10. A laser tracker calibration method, characterized in that: Using the laser tracker calibration device according to any one of claims 1 to 9, the method comprises: Adjusting the distance between the first mounting platform and the second mounting platform to a preset distance; Rotating the reflector to a preset angle; Adjusting the first mounting bracket, the second mounting bracket, and the third mounting bracket to preset positions; Starting the laser tracker so that the laser light it emits passes through the reflector and the pentaprism in sequence and reaches the target mirror, thereby obtaining first length measurement data; Starting the interferometer so that the light emitted by the interferometer passes through the interferometer mirror and reaches the pentaprism to obtain second length measurement data; The laser tracker is calibrated according to the first length measurement data and the second length measurement data.

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