A device for detecting the linearity and symmetry of a galvanometer motor

Abstract

This utility model discloses a device for detecting the linearity and symmetry of a galvanometer motor. The device includes an optical platform with a detection station, the detection station comprising: a base fixed to the optical platform; a mounting base disposed on one side of the base; a laser mounted on the mounting base; a first optical mirror located within the receptive range of a first laser beam; a second optical mirror located within the receptive range of a second laser beam reflected from the first optical mirror; a first aperture embedded in the base; a second aperture embedded in the mounting base, wherein a third laser beam reflected from the second optical mirror can pass through the second aperture; a galvanometer mirror of the galvanometer motor located within the receptive range of a fourth laser beam emitted from the second aperture; and a spot acquisition device located within the receptive range of a fifth laser beam reflected from the galvanometer mirror. This utility model has a simple structure, low cost, and saves space; it is easy to operate and convenient to verify, and can quickly detect the performance and quality of a galvanometer motor.

Description

Technical Field

[0001] This utility model belongs to the field of galvanometer testing technology, specifically relating to a galvanometer motor linearity and symmetry testing device. Background Technology

[0002] Currently, in applications such as laser processing and optical communication, the high-precision control and consistency of galvanometers determine the market positioning value of galvanometer products. At the same time, galvanometers with good consistency are easier to disassemble and replace, reducing maintenance and calibration costs, and thus gaining greater customer favor. One of the core components of a galvanometer is the galvanometer motor, and the linearity and symmetry of the galvanometer motor are key factors affecting the high precision and consistency of the galvanometer product.

[0003] However, existing testing instruments are expensive, bulky, and space-consuming, and their operation is cumbersome and the calibration process is complex, making it impossible to quickly test the performance and quality of galvanometer motors. Therefore, a galvanometer motor linearity and symmetry testing device was designed to solve the above problems.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0005] To overcome the shortcomings of the prior art, the purpose of this utility model is to provide a device for detecting the linearity and symmetry of a galvanometer motor.

[0006] To achieve the above and other related objectives, this utility model provides a galvanometer motor linearity and symmetry testing device, including an optical platform, wherein a testing station is provided on the optical platform, and the testing station includes:

[0007] A base, which is fixed on the optical platform, is used to mount the motor of the galvanometer to be tested;

[0008] A mounting base is disposed on one side of the machine base;

[0009] A laser, which is mounted on the fixed base, is used to emit an initial first laser beam; the laser and the galvanometer motor are located on different sides of the base;

[0010] A first optical reflector is located within the receiving range of the first laser beam;

[0011] The second optical reflector is located within the receiveable range of the second laser beam reflected by the first optical reflector;

[0012] The first aperture is embedded in the base;

[0013] The second aperture is embedded in the fixed base, and the third laser beam reflected by the second optical mirror can pass through the second aperture; the galvanometer of the galvanometer motor is located within the receiving range of the fourth laser beam emitted from the second aperture;

[0014] A light spot acquisition device is located within the receivable range of the fifth laser beam reflected from the galvanometer mirror.

[0015] Furthermore, the first optical reflector is mounted on a two-dimensional adjustment frame one, and the second optical reflector is mounted on a two-dimensional adjustment frame two. In this scheme, the two-dimensional adjustment frames are used to fine-tune the coaxiality and incident angle of the laser beam. Compared with manual adjustment, this improves accuracy, thereby ensuring the accuracy of the linearity and symmetry detection of the galvanometer motor.

[0016] Furthermore, both the first and second apertures are precision micro-aperture apertures, and both the fourth and fifth laser beams are shaped small-spot laser beams. In this design, the third laser beam, after passing through the aperture, can obtain a shaped small-spot laser beam, which facilitates spot acquisition and improves the accuracy of spot acquisition.

[0017] Furthermore, the centerline of the first aperture coincides with the centerline of the second aperture, and the propagation paths of the third and fourth laser beams also coincide with the centerline of the second aperture. In this design, both the third and fourth laser beams propagate along the centerline of the aperture, resulting in a more uniform small-spot laser beam after passing through the aperture.

[0018] Furthermore, the first laser beam is positioned at a 45° angle to the first optical reflector, the second laser beam is positioned at a 45° angle to the second optical reflector, the first and second optical reflectors are symmetrically arranged, and the third laser beam is parallel to the first laser beam. This design facilitates the arrangement of the optical reflectors, ensures precise laser beam propagation, and guarantees the accuracy of the linearity and symmetry detection of the galvanometer motor.

[0019] Furthermore, the light spot acquisition device includes a centrally graduated scale. In this design, the centrally graduated scale has excellent symmetry and accurate markings. The scale lines on the centrally graduated scale are typically evenly distributed, ensuring measurement accuracy; the finer scale lines help improve reading precision, and the finer lines reduce visual errors, making the reading more accurate.

[0020] Furthermore, the scale surface of the center-divided scale is oriented towards the reflection direction of the galvanometer. In this design, the fifth laser beam is ensured to be positioned perpendicular to the scale surface of the center-divided scale.

[0021] Furthermore, the laser is a single-mode fiber collimated laser. In this solution, using this laser can obtain a high-power, high-efficiency, and high-quality beam, as well as high precision and high sensitivity, ensuring the accuracy of the linearity and symmetry detection of the galvanometer motor.

[0022] Furthermore, the testing station is provided with two stations. In this solution, the two testing stations can be used to test the X-mirror motor and the Y-mirror motor respectively. The two testing stations can share a single base and be arranged symmetrically relative to the base, thereby improving testing efficiency.

[0023] Furthermore, the base is T-shaped. In this design, the T-shaped base facilitates the installation of the two galvanometer motors.

[0024] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0025] The present invention relates to a galvanometer motor linearity and symmetry testing device and method. The device has a simple structure, low manufacturing cost, and wide applicability. It is compact and space-saving. It is easy to operate and highly intuitive. The tool calibration is convenient and quick, and it can quickly test the performance and quality of the galvanometer motor. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the detection device of this utility model;

[0027] Figure 2 This is a schematic diagram of the fixing base and related structures of this utility model;

[0028] Figure 3 This is a schematic diagram of the detection status of this utility model. Figure 1 ;

[0029] Figure 4 This is a schematic diagram of the detection status of this utility model. Figure 2 ;

[0030] Figure 5 This is a schematic diagram of the detection status of this utility model. Figure 3 ;

[0031] Figure 6 This is a schematic diagram of the detection status of this utility model. Figure 4 ;

[0032] In the above figures, 1 is the optical platform; 2 is the base; 3 is the galvanometer motor; 301 is the galvanometer mirror; 4 is the mounting base; 5 is the laser; 6 is the first optical mirror; 7 is the second optical mirror; 8 is the first aperture; 9 is the second aperture; 10 is the light spot acquisition device; 11 is the first laser beam; 12 is the second laser beam; 13 is the third laser beam; 14 is the fourth laser beam; 15 is the fifth laser beam; 16 is the first two-dimensional adjustment frame; 17 is the second two-dimensional adjustment frame; and 18 is the driver. Detailed Implementation

[0033] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0034] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0037] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0038] Example 1:

[0039] See appendix Figure 1 and attached Figure 2 As shown, this embodiment provides a galvanometer motor linearity and symmetry detection device, including an optical platform 1. The optical platform 1 is configured to ensure the consistency of the detection. The optical platform 1 is provided with a detection station, which includes:

[0040] The base 2 is fixed on the optical platform 1 and is used to mount the galvanometer motor 3 to be tested;

[0041] Fixture 4 is located on one side of the base 2;

[0042] See appendix Figure 1 and attached Figure 2 As shown, it also includes a laser 5, which is mounted on the fixed base 4 and is used to emit the initial first laser beam 11. The laser 5 and the galvanometer motor 3 are located on different sides of the base 2. The laser 5 is a single-mode fiber collimated laser. Using this laser 5 can obtain a high-power, high-efficiency, and high-quality beam, and it also has high precision and high sensitivity, ensuring the accuracy of the linearity and symmetry detection of the galvanometer motor 3.

[0043] The first optical reflector 6 is located within the receiving range of the first laser beam 11;

[0044] The second optical reflector 7 is located within the receiving range of the second laser beam 12 reflected by the first optical reflector 6;

[0045] See appendix Figure 1As shown, it also includes a first aperture 8, which is embedded in the base 2; it also includes a second aperture 9, which is embedded in the fixed base 4. The third laser beam 13 reflected by the second optical mirror 7 can pass through the second aperture 9; the galvanometer mirror 301 of the galvanometer motor 3 is located within the receiving range of the fourth laser beam 14 emitted from the second aperture 9; both the first aperture 8 and the second aperture 9 are precision micro-aperture apertures, and the fourth laser beam 14 and the fifth laser beam 15 are shaped small-spot laser beams. After the third laser beam 13 passes through the aperture, a shaped small-spot laser beam can be obtained, which facilitates the acquisition of the spot and improves the accuracy of the spot acquisition. The center line of the first aperture 8 coincides with the center line of the second aperture 9, and the propagation paths of the third laser beam 13 and the fourth laser beam 14 coincide with the center line of the second aperture 9. The third laser beam 13 and the fourth laser beam 14 both propagate along the center line of the aperture, making the small-spot laser beam obtained after passing through the aperture more uniform.

[0046] See appendix Figure 1 As shown, it also includes a light spot acquisition device 10, which is located within the receivable range of the fifth laser beam 15 reflected from the galvanometer mirror 301. The light spot acquisition device 10 includes a centered graduated scale. This centered graduated scale has excellent symmetry and accurate markings. The scale lines on the centered scale are generally evenly distributed to ensure measurement accuracy; the finer scale lines help improve reading precision, and the finer scale lines reduce visual errors, making the reading more accurate. The scale surface of the centered scale is set towards the reflection direction of the galvanometer mirror 301. This ensures that the fifth laser beam 15 can be set perpendicular to the scale surface of the centered scale.

[0047] See appendix Figure 2 As shown, the first optical reflector 6 is mounted on the two-dimensional adjustment frame 16, and the second optical reflector 7 is mounted on the two-dimensional adjustment frame 17. The two-dimensional adjustment frame is used to fine-tune the coaxiality and incident angle of the laser beam. Compared with manual adjustment, it improves the accuracy, thereby ensuring the accuracy of the linearity and symmetry detection of the galvanometer motor 3.

[0048] See appendix Figure 2 As shown, the first laser beam 11 is set at a 45° angle to the first optical reflector 6, the second laser beam 12 is set at a 45° angle to the second optical reflector 7, the first optical reflector 6 and the second optical reflector 7 are symmetrically arranged, and the third laser beam 13 is set parallel to the first laser beam 11. This arrangement of the optical reflectors facilitates the precise propagation of the laser beams and ensures the accuracy of the linearity and symmetry detection of the galvanometer motor 3.

[0049] See appendix Figure 1As shown, there are two inspection stations. These two stations can be used to inspect the X-galvanometer motor 3 and the Y-galvanometer motor 3, respectively. The X-galvanometer motor 3 is mainly used to control the deflection of the laser beam in the horizontal direction (X-axis). Through high-speed rotation, it enables precise movement of the laser beam in the X-axis direction, thus achieving fine control during laser welding or cutting. The Y-galvanometer motor 3 controls the deflection of the laser beam in the vertical direction (Y-axis). Similarly, through high-speed rotation, it enables precise movement of the laser beam in the Y-axis direction, working in conjunction with the X-galvanometer motor 3 to complete complex laser processing tasks. The two inspection stations can share a single base 2 and be arranged symmetrically relative to it, improving inspection efficiency. The base 2 is T-shaped, facilitating the installation of the two galvanometer motors 3.

[0050] Example 2:

[0051] This utility model also discloses a method for detecting the linearity and symmetry of a galvanometer motor 3. The detection method is applicable to the detection device in Embodiment 1, and the detection method includes the following steps:

[0052] Step 1: A first laser beam 11 is emitted by laser 5. The first laser beam 11 passes through the first optical mirror 6 to form a second laser beam 12. The second laser beam 12 passes through the second optical mirror 7 to form a third laser beam 13. The third laser beam 13 is shaped by the first aperture 8 and the second aperture 9 to form a fourth laser beam 14 with high quality and a small spot diameter. The fourth laser beam 14 is reflected by the galvanometer mirror 301 of the galvanometer motor 3 to form a fifth laser beam 15, which illuminates the center scale of the spot acquisition device 10.

[0053] Step 2: Through fine-tuning between the two-dimensional adjustment frame 16 and the two-dimensional adjustment frame 17, the laser beam is finally directed at a fixed angle to the center of the galvanometer mirror 301 of the galvanometer motor 3. (See Appendix) Figure 3 As shown;

[0054] Step 3: Set the galvanometer motor 3 to the origin of the control system under power-on conditions. Adjust the angle of the galvanometer motor 3 on the base 2 so that the galvanometer mirror 301 of the galvanometer motor 3 forms a 45° angle with the incident laser beam. The laser beam propagates and perpendicularly illuminates the position at coordinate 0 on the center scale. Set the distance between the center of the galvanometer mirror 301 and the center scale at this time as L. See Appendix. Figure 3 As shown;

[0055] Step 4: The control system sends a command to the galvanometer motor 3, and the driver 18 is used to deflect the galvanometer motor 3 by a certain angle. The position of the laser beam spot on the center scale is set as S. (See Appendix) Figure 4As shown, the actual rotation angle θ of the galvanometer motor 3 for each cycle is calculated using the trigonometric function formula: θ = arctan(S / L). See Appendix. Figure 4 As shown;

[0056] Step 5: Continuously send commands to the galvanometer motor 3, and obtain the linearity curve of the galvanometer motor 3 based on the calculated error of the actual rotation angle θ;

[0057] Step Six: Send forward and reverse deflection commands with the same amount of change to the galvanometer motor 3, and set the two positions corresponding to the laser spot on the center scale as S1 and S2, respectively. See Appendix. Figure 5 and attached Figure 6 As shown, the absolute errors of S1 and S2 are calculated, which gives the symmetry error S′ of the galvanometer motor 3.

[0058] Calibration of galvanometer motor 3:

[0059] By using this detection device, the same instruction array is given to different galvanometer motors 3, and the actual deflection angle of the galvanometer motor 3 is corrected so that the actual rotation angle θ of the galvanometer motor 3 is the same for each instruction array, thus ensuring the consistency of the galvanometer motor 3.

[0060] The testing methods for X-mirror motors and Y-mirror motors are the same.

[0061] The present invention relates to a galvanometer motor linearity and symmetry testing device and method. The device has a simple structure, low manufacturing cost, and wide applicability. It is compact and space-saving. It is easy to operate and highly intuitive. The tool calibration is convenient and quick, and it can quickly test the performance and quality of the galvanometer motor.

[0062] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A galvanometer motor linearity and symmetry detection device, characterized in that: Includes an optical platform (1), on which a detection station is provided, the detection station including: The base (2) is fixed on the optical platform (1) and is used to mount the galvanometer motor (3) to be tested. A fixing seat (4) is provided on one side of the machine base (2); A laser (5) is mounted on the fixed base (4) and is used to emit an initial first laser beam (11); the laser (5) and the galvanometer motor (3) are located on different sides of the base (2); The first optical mirror (6) is located within the receiving range of the first laser beam (11); The second optical reflector (7) is located within the receiving range of the second laser beam (12) reflected by the first optical reflector (6); The first aperture (8) is embedded in the base (2); The second aperture (9) is embedded in the fixed base (4), and the third laser beam (13) reflected by the second optical mirror (7) can pass through the second aperture (9); the galvanometer mirror (301) of the galvanometer motor (3) is located within the receiving range of the fourth laser beam (14) emitted by the second aperture (9); A light spot acquisition device (10) is located within the receiving range of the fifth laser beam (15) reflected by the galvanometer (301).

2. The linear degree and symmetry detection device of a galvanometer motor according to claim 1, characterized in that: The first optical reflector (6) is mounted on the first two-dimensional adjustment frame (16), and the second optical reflector (7) is mounted on the second two-dimensional adjustment frame (17).

3. The linear degree and symmetry detection device of a galvanometer motor according to claim 1, characterized in that: The first aperture (8) and the second aperture (9) are both precision micro-aperture apertures, and the fourth laser beam (14) and the fifth laser beam (15) are both shaped small-spot laser beams.

4. The linear degree and symmetry detection device of a galvanometer motor according to claim 1, characterized in that: The center line of the first aperture (8) coincides with the center line of the second aperture (9), and the propagation paths of the third laser beam (13) and the fourth laser beam (14) coincide with the center line of the second aperture (9).

5. The linear degree and symmetry detection device of a galvanometer motor according to claim 1, characterized in that: The first laser beam (11) is set at a 45° angle to the first optical mirror (6), the second laser beam (12) is set at a 45° angle to the second optical mirror (7), the first optical mirror (6) and the second optical mirror (7) are set symmetrically to the left and right, and the third laser beam (13) is set parallel to the first laser beam (11).

6. The linear degree and symmetry detection device of a galvanometer motor according to claim 1, characterized in that: The light spot acquisition device (10) includes a center-divided scale.

7. The linear degree and symmetry detection device of a galvanometer motor according to claim 6, characterized in that: The scale surface of the central scale is set facing the reflection direction of the galvanometer (301).

8. The linear degree and symmetry detection device of a galvanometer motor according to claim 1, characterized in that: The laser (5) is a single-mode fiber collimated laser (5).

9. The linear degree and symmetry detection device of a galvanometer motor according to claim 1, characterized in that: There are two testing stations.

10. The linear degree and symmetry detection device of a galvanometer motor according to claim 9, characterized in that: The base (2) is T-shaped.

Images