Calibration equipment and calibration methods

Abstract

The present application relates to the technical field of drive shaft calibration equipment, and in particular to a calibration device and calibration method. The calibration device includes a base plate, an air-floating guide rail assembly, a drive assembly, a balancing mechanism, and a reference assembly. The air-floating guide rail assembly includes a guide rail part and a slide part. The balancing mechanism is used to balance the weight of the slide part, and can maintain self-balance when the external driving force disappears, and the slide part will not slide down toward the base due to its own weight. The balancing mechanism makes the thrust of the drive assembly when driving the slide part to approach or move away from the base plate under the guidance of the guide rail part consistent, so that the slide part stays stably at the coordinate taking position. The air-floating guide rail assembly is used to improve the accuracy of the reference assembly when it moves; the balancing mechanism is used to balance the force of the slide part when it moves toward the base plate, without the need for additional large and heavy counterweights. In this way, the calibration equipment is made more portable and easier to operate, and the calibration accuracy meets expectations.

Description

Technical Field

[0001] The present application relates to the technical field of drive shaft calibration equipment, and in particular to a calibration device and a calibration method. Background Art

[0002] Industrial production relies on single-axis or multi-axis drives for inspection and processing. To improve production accuracy, drive shaft calibration is necessary. As a calibration tool for precision equipment, the calibration equipment must meet expectations for accuracy. To ensure ease of use, the calibration equipment should be portable, compact, and easy to operate.

[0003] However, the current calibration equipment is too large and inconvenient to operate due to its unreasonable structural design, and the calibration accuracy is difficult to achieve as expected.

[0004] It can be seen that how to make the calibration equipment more portable, easier to operate, and ensure that the calibration accuracy meets expectations is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The present application provides a calibration device and a calibration method, which aim to solve the technical problems in the prior art of how to make the calibration device more portable, more convenient to operate, and ensure that the calibration accuracy meets expectations.

[0006] The present application provides a calibration device comprising:

[0007] base plate;

[0008] An air-floating guide rail assembly, the air-floating guide rail assembly comprising a guide rail member and a slide member, the guide rail member being vertically mounted on the base plate, the guide rail member being adapted to the slide member;

[0009] A driving assembly, the driving assembly being mounted on the base plate, the slide being fixedly connected to an output end of the driving assembly;

[0010] a balancing mechanism, the balancing mechanism being fixedly connected to one or both of the slide member and the output end of the drive assembly, the balancing mechanism balancing the force of the slide member when moving toward the base plate, thereby preventing the slide member from moving toward the base plate; and

[0011] A reference assembly, the reference assembly being fixedly mounted on the slide member, the reference assembly being provided with a reference hole, the reference hole being oriented toward an end of the guide rail member away from the base plate;

[0012] Wherein, the driving assembly drives the slide member to approach or move away from the base plate under the guidance of the guide rail member.

[0013] Furthermore, the base plate is provided with first adjusting screws, the number of the first adjusting screws is at least three, at least three of the first adjusting screws are not collinear, and the first adjusting screws are used to adjust the parallelism of the base plate and the external reference plane.

[0014] Furthermore, the guide rail member is a rectangular column, and is provided with an inner concave portion and a weight-reducing hole, the inner concave portion is arranged along the length direction of the guide rail member, and the reference assembly is located on the side of the inner concave portion;

[0015] The weight-reducing hole is cylindrical, and the central axis of the weight-reducing hole is arranged along the length direction of the guide rail member.

[0016] Furthermore, the inner concave portion is arc-shaped, the center of the inner concave portion is located at a corner of the guide rail member, and the symmetry line of the cross section of the inner concave portion is located at the diagonal line of the cross section of the guide rail member.

[0017] Furthermore, the weight-reducing hole includes a first hole and a second hole;

[0018] The center of the first hole is located on the diagonal line of the cross section of the guide rail member, and a diameter of the first hole is collinear with the symmetry line of the cross section of the inner recess;

[0019] The second hole is symmetrical along a symmetry line of a cross section of the inner recess, and a diameter of the second hole is collinear with a diameter of the first hole.

[0020] Furthermore, the driving assembly is a linear motor, and the slide member is fixedly connected to a mover of the linear motor.

[0021] Furthermore, the balancing mechanism includes:

[0022] a transmission device, the transmission device being fixedly connected to the slide member; and

[0023] a one-way damping device connected to the transmission device;

[0024] The one-way damping device is used to balance the force when the slide moves toward the base plate, thereby preventing the slide from moving toward the base plate.

[0025] Furthermore, the transmission device includes:

[0026] a support plate mounted on the base plate; and

[0027] A pulley assembly, the pulley assembly comprising a first pulley, a second pulley, and a transmission belt, the first pulley and the second pulley being mounted on the same side of the support plate, the first pulley and the second pulley supporting the transmission belt, the first pulley being connected to the input end of the one-way damping device, and the transmission belt being fixedly connected to one or both of the slide member and the output end of the drive assembly;

[0028] When the slide moves toward the base plate, the one-way damping device produces a damping effect on the pulley assembly to prevent the pulley assembly from moving, and through the transmission of the pulley assembly, the slide is prevented from moving toward the base plate.

[0029] Furthermore, the one-way damping device includes:

[0030] An input shaft, one end of which is connected to the transmission device via a one-way bearing;

[0031] a planetary gear transmission assembly, wherein a low-speed side of the planetary gear transmission assembly is connected to an end of the input shaft facing away from the transmission device;

[0032] an output shaft, one end of which is connected to the high-speed side of the planetary gear transmission assembly; and

[0033] an adjusting assembly connected to an end of the output shaft facing away from the planetary gear speed change assembly, the adjusting assembly being used to apply a damping force to the output shaft;

[0034] The resistance of the output shaft during rotation is adjusted by twisting the adjustment assembly.

[0035] On the other hand, the present application also provides a calibration method, which is implemented using the above-mentioned calibration device and includes the following steps:

[0036] Step 1: Position the slide at an initial position Z0, capture an image of the reference hole in the reference assembly at this time using a camera mounted on the drive shaft to be calibrated, and calculate the center coordinate value (X0, Y0) of the reference hole;

[0037] Step 2: The driving assembly drives the slide to move to position Z1. At this time, the axis to be calibrated and the slide move the same distance. The camera captures the image of the reference hole at this time, and calculates the coordinate value (X1, Y1) of the center of the reference hole at this time. The offset (mX1, mY1) of the coordinate value of the reference hole at this time relative to the initial position is also calculated.

[0038] Step 3: Repeat step 2 and take pictures in sequence along the moving path of the drive shaft to be tested. When the drive assembly drives the slide to move to position Zn, the camera captures the image of the reference hole at this time and calculates the coordinate value (Xn, Yn) of the center of the reference hole at this time, and calculates the coordinate value offset (mXn, mYn) of the reference hole relative to the initial position.

[0039] Step 4: Use the offsets (mX1, mY1) to (mXn, mYn) as the compensation values ​​for calibration, and perform compensation calibration on the coordinates of the drive shaft positions corresponding to the compensation values, so that the coordinate values ​​of each stop position of the drive shaft are equal to the coordinate values ​​of the initial position, that is, the center points of the drive shaft at each stop position are on the same straight line.

[0040] The beneficial effects achieved by this application are:

[0041] The present application proposes a calibration device comprising a base plate, an air-floating guide rail assembly, a drive assembly, a balancing mechanism, and a reference assembly. The air-floating guide rail assembly comprises a guide rail member and a slide member, wherein the guide rail member is vertically mounted on the base plate and is adapted to the slide member. The drive assembly is mounted on the base plate, and the slide member is fixedly connected to the output end of the drive assembly. The balancing mechanism is used to balance the force applied when the slide member moves toward the base plate, thereby preventing the slide member from moving toward the base plate. The reference assembly is fixedly mounted on the slide member, and the reference assembly is provided with a reference hole, which faces the end of the guide rail member facing away from the base plate. The drive assembly drives the slide member to move closer to or away from the base plate under the guidance of the guide rail member.

[0042] During calibration, the slide is positioned at its initial position, and a camera mounted on the drive shaft to be calibrated captures the coordinates of the reference hole in the reference assembly at that time. The drive assembly drives the slide, guided by the guide rail, to move the same distance as the shaft to be calibrated. The camera mounted on the drive shaft to be calibrated captures the coordinates of the reference hole in the reference assembly at that time, and calculates the offset of the drive shaft to be calibrated relative to the initial position. Multiple coordinate axes and offsets are captured along the movement path of the drive shaft to be calibrated in the same manner. Compensation calibration is performed based on the calculated offsets. When the slide is positioned at the coordinate acquisition location, a balancing mechanism prevents the slide from approaching the base plate, allowing the slide to remain stably at the coordinate acquisition location.

[0043] The air-floating guide rail assembly improves the accuracy of the reference assembly's movement. A balancing mechanism balances the force applied when the slide moves closer to the base plate, eliminating the need for bulky, heavy counterweights. This makes the calibration equipment more portable and easier to operate, while ensuring the desired accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1This is a schematic diagram of the three-dimensional structure of the calibration device in an embodiment of the present invention. Figure 1 ;

[0045] Figure 2 This is a schematic diagram of the three-dimensional structure of the calibration device in an embodiment of the present invention. Figure 2 ;

[0046] Figure 3 This is a schematic diagram of the three-dimensional structure of the calibration device in an embodiment of the present invention. Figure 3 ;

[0047] Figure 4 3D schematic diagram of the application scenario of the calibration device in an embodiment of the present invention;

[0048] Figure 5 1 is a schematic diagram of the three-dimensional structure of the air-floating guide rail assembly in an embodiment of the present invention;

[0049] Figure 6 is a schematic diagram of the three-dimensional structure of the balancing mechanism in an embodiment of the present invention;

[0050] Figure 7 is a cross-sectional view of a one-way damping device according to an embodiment of the present invention;

[0051] Figure 8 is an exploded view of a one-way damping device according to an embodiment of the present invention;

[0052] Figure 9 is a schematic diagram of the three-dimensional structure of the reference assembly in an embodiment of the present invention;

[0053] Figure 10 is a cross-sectional view of a reference assembly in an embodiment of the present invention.

[0054] Description of main component symbols:

[0055] 100. Calibration equipment;

[0056] 110. Base plate; 111. First adjusting screw; 120. Air-floating guide rail assembly; 121. Guide rail member; 1211. Inner recess; 1212. Weight-reducing hole; 12121. First hole; 12122. Second hole; 122. Slide member; 130. Drive assembly; 140. Balancing mechanism; 141. Transmission device; 1411. Support plate; 1412. Pulley assembly; 1413. First pulley; 1414. Second pulley; 1415. Drive belt; 1416. Tensioning pulley; 142. One-way damping device; 1421. Input shaft; 1422. Planetary gear transmission assembly; 14221. Internal gear Sleeve; 14222, meshing teeth; 14223, first gear; 14224, first planetary gear; 14225, first transmission disc; 14226, second gear; 14227, second planetary gear; 14228, second transmission disc; 1423, output shaft; 1424, adjustment assembly; 14241, adjustment seat; 14242, thrust ball bearing; 14243, spring member; 14244, adjustment member; 14245, second adjustment screw; 1425, one-way bearing; 150, reference assembly; 151, housing; 152, diffuser plate; 153, light-emitting plate; 154, reference plate; 155, reference hole. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. In addition, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0058] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "left", "right", "horizontal", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0060] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0062] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will appreciate the application of other processes and / or the use of other materials.

[0063] Example 1

[0064] See also Figures 1 to 4The calibration device 100 proposed in this application includes a base plate 110, an air-floating guide rail assembly 120, a drive assembly 130, a balancing mechanism 140, and a reference assembly 150. The air-floating guide rail assembly 120 includes a guide rail member 121 and a slide member 122. The guide rail member 121 is vertically mounted on the base plate 110, and the guide rail member 121 is adapted to the slide member 122. The drive assembly 130 is mounted on the base plate 110, and the slide member 122 is fixedly connected to the output end of the drive assembly 130. The balancing mechanism 140 is fixedly connected to one or both of the slide member 122 and the output end of the drive assembly 130. The balancing mechanism 140 is used to balance the force applied when the slide member 122 moves toward the base plate 110, thereby preventing the slide member 122 from moving toward the base plate 110. The reference assembly 150 is fixedly mounted on the slide member 122 and is provided with a reference hole 155. The reference hole 155 faces the end of the guide member 121 away from the base plate 110. The driving assembly 130 drives the slide member 122 to move closer to or away from the base plate 110 under the guidance of the guide member 121.

[0065] During calibration, the slide 122 is positioned at its initial position, and a camera mounted on the drive shaft to be calibrated captures the coordinates of the reference hole 155 in the reference assembly 150. The drive assembly 130 drives the slide 122, guided by the guide rail 121, to move the same distance as the shaft to be calibrated. The camera mounted on the drive shaft to be calibrated captures the coordinates of the reference hole 155 in the reference assembly 150, and calculates the offset of the shaft to be calibrated relative to the initial position. Multiple coordinate axes and offsets are captured along the movement path of the shaft to be calibrated in the same manner. Compensation calibration is performed based on the calculated offsets. When the slide 122 remains at the coordinate acquisition position, the balancing mechanism 140 prevents the slide 122 from approaching the base plate 110, allowing the slide 122 to remain stably at the coordinate acquisition position.

[0066] The air-floating guide rail assembly 120 improves the accuracy of the movement of the reference assembly 150. The balancing mechanism 140 balances the force exerted by the slide member 122 as it moves toward the base plate 110, eliminating the need for additional bulky and heavy counterweights. This makes the calibration device 100 more portable and easier to operate, while ensuring the desired calibration accuracy.

[0067] The base plate 110 is provided with first adjusting screws 111 . There are at least three first adjusting screws 111 , at least three of which are not collinear. The first adjusting screws 111 are used to adjust the parallelism between the base plate 110 and the external reference surface.

[0068] Before calibration, the parallelism between the base plate 110 and the external reference surface is adjusted by turning the first adjustment screw 111 to change the extension of the first adjustment screw 111 from the base plate 110. Since the guide rail member 121 is mounted perpendicularly to the base plate 110, the perpendicularity between the base plate 110 and the external reference surface is also achieved. The travel path of the drive shaft to be measured is perpendicular to the external reference surface. Therefore, once the perpendicularity between the guide rail member 121 and the external reference surface is adjusted, the travel path of the slide member 122 and the travel path of the drive shaft to be measured are aligned as expected. The reference assembly 150 is driven by the air-floating guide rail assembly 120. During movement, the slide member 122 moves under the guidance of the guide rail member 121, thereby ensuring that the travel path of the reference hole 155 of the reference assembly 150 and the travel path of the drive shaft to be measured are aligned as expected, thereby improving the accuracy of the calibration device 100.

[0069] See also Figures 1 to 4 In one application scenario of the present application, the calibration device 100 is used to calibrate the Z-axis in the three-axis mobile module.

[0070] Before calibration, place the calibration device 100 on a platform below the Z-axis, with the base plate 110 positioned to support the platform. Four first adjustment screws 111 are arranged in a rectangular pattern at the four corners of the base plate 110. By turning the first adjustment screws 111, the amount of extension of the first adjustment screws 111 from the base plate 110 is changed, thereby pushing the base plate 110 upward. The first adjustment screws 111 are used to adjust the parallelism of the base plate 110 with the XY axis motion plane, thereby adjusting the perpendicularity of the guide rail 121 with the XY axis motion plane. The moving direction of the Z axis is perpendicular to the moving plane of the XY axis, and the slide member 122 moves under the guidance of the guide rail member 121. The reference assembly 150 is fixedly installed on the slide member 122. Therefore, when the adjustment of the base plate 110 and the moving plane of the XY axis is completed, the adjustment of the parallelism of the moving path of the reference hole 155 in the reference assembly 150 and the moving path of the Z axis is completed, so that the moving path of the reference hole 155 adapts to the moving path of the Z axis.

[0071] A camera is mounted on the Z-axis to capture a clear image of the reference hole 155. The lowest position of the slide 122 is used as the initial position. The camera captures an image of the reference hole 155 at this initial position, and the XY coordinates of the reference hole 155 at this time are calculated. The Z-axis moves upward. The drive assembly 130 drives the slide 122 upward along with the Z-axis under the guidance of the guide rail 121. The camera captures an image of the reference hole 155 at this time, and the offset of the reference hole 155 in the XY directions relative to the initial position is calculated. In a similar manner, multiple images are taken from bottom to top along the Z-axis path, and the offset of each point in the path relative to the initial position in the XY directions is calculated. This ensures that each point is not aligned with the initial position. The balancing mechanism 140 is used to balance the weight of the slide 122. When the external driving force is removed, the slide 122 remains self-balanced, preventing it from sliding toward the base due to its own weight. The balancing mechanism 140 ensures that the driving assembly 130 drives the slide 122 toward or away from the base plate 110 with consistent thrust under the guidance of the guide rail 121. The balancing mechanism 140 balances the force exerted by the slide 122 when moving toward the base plate 110, preventing the slide 122 from moving toward the base plate 110 and allowing the slide 122 to remain stably at the measurement position.

[0072] After obtaining the offset of each point relative to the initial position in the XY direction, use the offset of each point relative to the initial position in the XY direction as the compensation value to calibrate the points at each imaging position so that each point is in the same straight line as the point at the initial position. In this way, the calibration of the Z axis is completed.

[0073] See also Figures 9 and 10 The reference assembly 150 may include a housing 151, a diffuser 152 mounted on the housing 151, a light-emitting plate 153 mounted within the housing 151, a reference plate 154 mounted on the top of the housing 151, and a reference hole 155 disposed on the reference plate 154. Light emitted by the light-emitting plate 153 is homogenized by the diffuser 152 before being irradiated onto the wall of the reference hole 155 on the reference plate 154. When the camera captures an image, it can obtain a clear image of the reference hole 155, thereby improving the accuracy of the point coordinates.

[0074] A contact probe may also be installed on the Z axis to obtain the coordinates of the point at the reference hole 155 through the contact probe.

[0075] Example 2

[0076] Based on the above embodiment 1, please refer to Figures 1 to 5The guide rail member 121 is a rectangular cylinder and is provided with an inner recess 1211 and a weight-reducing hole 1212. The inner recess 1211 is arranged along the length of the guide rail member 121, and the reference assembly 150 is located on the side of the inner recess 1211. The weight-reducing hole 1212 is cylindrical, and the central axis of the weight-reducing hole 1212 is arranged along the length of the guide rail member 121.

[0077] In order to increase the angle of the guide rail member 121, the guide rail member 121 can be made of marble. By providing an inner recess 1211 and a weight-reducing hole 1212, the weight of the guide rail member 121 can be reduced. It is understandable that when the weight of the guide rail member 121 is greater, the influence of gravity on the guide rail member 121 will be greater. As time goes by, the structure of the upper part of the guide rail member 121 will be deformed downward by gravity, thereby affecting the accuracy of the guide rail member 121. By providing an inner recess 1211 and a weight-reducing hole 1212, the weight of the guide rail member 121 is reduced, thereby reducing the influence of gravity on the guide rail member 121, thereby reducing the deformation of the guide rail member 121 caused by gravity, so that the accuracy of the guide rail member 121 is maintained within the expected range. The cylindrical weight-reducing hole 1212 can support the structure of the physical part of the guide rail member 121 through the tension of the cylindrical inner wall, further improving the stability of the structure of the guide rail member 121, and further ensuring the accuracy of the guide rail member 121, thereby ensuring the calibration accuracy.

[0078] See also Figure 5 By placing the reference assembly 150 on the side of the inner recess 1211, the reference assembly 150 can be prevented from hanging out of the air-floating guide rail assembly 120, so that the reference assembly 150 is located on the inner side of the slide member 122, thereby improving the positional accuracy of the reference assembly 150 and reducing the impact of the movement process on the installation position of the reference assembly 150, thereby further improving the accuracy of the calibration device 100. It is understandable that if the reference assembly 150 hangs out of the air-floating guide rail assembly 120, the installation structure of the reference assembly 150 at the air-floating guide rail assembly 120 is a cantilever structure, and the cantilever structure is greatly affected by gravity and inertia during movement. Therefore, hanging the reference assembly 150 out of the air-floating guide rail assembly 120 will affect the accuracy of the calibration device 100.

[0079] The inner concave portion 1211 is arc-shaped, the center of the inner concave portion 1211 is located at a corner of the guide rail member 121 , and the symmetry line of the cross section of the inner concave portion 1211 is located at the diagonal line of the cross section of the guide rail member 121 .

[0080] The inner recess 1211 is set to be an arc shape. Through the support of the tension of the arc inner wall, the deformation of the guide rail member 121 caused by external force is reduced, the stability of the guide rail member 121 structure is improved, and the accuracy of the guide rail member 121 is maintained within the expected range.

[0081] The weight-reducing holes 1212 include a first hole 12121 and a second hole 12122. The center of the first hole 12121 is located on the diagonal of the cross section of the guide rail member 121, and the diameter of the first hole 12121 is collinear with the line of symmetry of the cross section of the inner recess 1211. The second hole 12122 is symmetrical along the line of symmetry of the cross section of the inner recess 1211, and the diameter of the second hole 12122 is collinear with the diameter of the first hole 12121.

[0082] The multiple weight-reducing holes 1212 are provided to further reduce the weight of the guide rail member 121 , thereby further reducing the influence of gravity on the structure of the guide rail member 121 .

[0083] The center of first hole 12121 is positioned on the diagonal of the cross section of guide rail member 121. The diameter of first hole 12121 is collinear with the line of symmetry of the cross section of inner recess 1211. Second hole 12122 is symmetrical along the line of symmetry of the cross section of inner recess 1211. This maintains a symmetrical structure for guide rail member 121, thereby improving the structural stability of guide rail member 121. The diameter of second hole 12122 is collinear with the diameter of first hole 12121, thereby aligning the apex of the wall of first hole 12121 with the apex of the wall of second hole 12122. This reduces the tendency of relative movement between second hole 12122 and first hole 12121, further improving the structural stability of guide rail member 121. This maintains the accuracy of guide rail member 121 within the desired range, thereby improving the accuracy of calibration device 100.

[0084] Example 3

[0085] Based on the above embodiment 1, please refer to Figures 1 to 3 The driving assembly 130 is a linear motor, and the slide member 122 is fixedly connected to the mover of the linear motor.

[0086] The linear motor directly drives the slide member 122 to move under the guidance of the guide rail member 121, avoiding the introduction of an intermediate structure. On the one hand, it reduces the influence of the intermediate structure on the accuracy of the slide member 122 and the guide rail member 121. On the other hand, it makes the structure of the calibration device 100 simpler, reduces the weight of the calibration device 100, and makes the calibration device 100 more portable and more convenient to operate.

[0087] See also Figures 1 to 3 as well as Figure 6 The balancing mechanism 140 includes a transmission device 141 and a one-way damping device 142. The transmission device 141 is fixedly connected to the slide member 122 and one or both of the output terminals of the drive assembly 130. The one-way damping device 142 is connected to the transmission device 141. The one-way damping device 142 is used to balance the force applied when the slide member 122 moves toward the base plate 110, thereby preventing the slide member 122 from moving in this direction.

[0088] When the driving assembly 130 drives the slide member 122 to move away from the base plate 110, the one-way damping device 142 is driven to operate through the transmission device 141. Since the one-way damping device 142 works in one direction, the slide member 122 can move smoothly at this time.

[0089] When the slide member 122 reaches the imaging position and needs to stop, the slide member 122 moves toward the base plate 110 under the action of the one-way damping device 142 because the one-way damping device 142 works in one direction.

[0090] See also Figure 6 The transmission device 141 includes a support plate 1411 and a pulley assembly 1412. The support plate 1411 is mounted on the base plate 110. The pulley assembly 1412 includes a first pulley 1413, a second pulley 1414, and a transmission belt 1415. The first pulley 1413 and the second pulley 1414 are mounted on the same side of the support plate 1411. The first pulley 1413 and the second pulley 1414 support the transmission belt 1413. The first pulley 1413 is connected to the input end of the one-way damping device 142. The transmission belt 1415 is fixedly connected to one or both of the slide member 122 and the output end of the drive assembly 130. Among them, when the slide member 122 moves toward the base plate 110, the one-way damping device 142 produces a damping effect on the pulley assembly 1412 to prevent the pulley assembly 1412 from moving. Through the transmission of the pulley assembly 1412, the slide member 122 is prevented from moving toward the base plate 110.

[0091] When the slide 122 moves, it drives the transmission belt 1415 to move, and then the pulley assembly 1412 is operated through the transmission belt 1415, and then the one-way damping device 142 is driven to operate through the pulley assembly 1412, so that the one-way damping device 142 plays a one-way damping role on the movement of the slide 122.

[0092] The transmission device 141 may further include a tensioning pulley 1416, which increases the tension of the transmission belt 1415 during operation through the tensioning pulley 1416, prevents the transmission belt 1415 from loosening during operation, and improves the reliability of the transmission device 141. In this embodiment, the tensioning pulley 1416 is installed on one side of the transmission belt 1415; in addition, the transmission belt 1415 passes through the tensioning pulley 1416 from the first pulley 1413 to the second pulley 1414, and there is at least one tensioning pulley 1416. In this embodiment, there are two tensioning pulleys 1416, and the distance from the two tensioning pulleys 1416 to the first pulley 1413 is smaller than the distance from the first pulley 1413 to the second pulley 1414. At the same time, the two tensioning pulleys 1416 are arranged at intervals. This structure can effectively lengthen the transmission distance of the transmission belt 1415, thereby making it easier to increase the tension of the transmission belt 1415.

[0093] See also Figures 6 to 8 The one-way damping device 142 includes an input shaft 1421, a planetary gear transmission assembly 1422, an output shaft 1423, an adjustment assembly 1424, and a one-way bearing 1425. One end of the input shaft 1421 is connected to the transmission device 141 via the one-way bearing 1425. The low-speed side of the planetary gear transmission assembly 1422 is connected to the end of the input shaft 1421 that faces away from the transmission device 141. One end of the output shaft 1423 is connected to the high-speed side of the planetary gear transmission assembly 1422. The adjustment assembly 1424 is connected to the end of the output shaft 1423 that faces away from the planetary gear transmission assembly 1422. The adjustment assembly 1424 is used to apply a damping force to the output shaft 1423. Turning the adjustment assembly 1424 adjusts the resistance of the output shaft 1423 to rotation.

[0094] The operating principle of one-way damping device 142 is that, because one-way bearing 1425 provides unidirectional transmission, when transmission device 141 rotates in one direction, it is difficult for transmission device 141 to rotate input shaft 1421. However, when transmission device 141 rotates in the other direction, transmission device 141 can rotate input shaft 1421. The operation of transmission device 141 rotates input shaft 1421, which in turn rotates output shaft 1423 via planetary gear transmission assembly 1422. As output shaft 1423 rotates, a damping force is applied to it via adjustment assembly 1424, and the magnitude of this damping force can be adjusted via adjustment assembly 1424.

[0095] Because input shaft 1421 is located on the low-speed side of planetary gear transmission assembly 1422, and output shaft 1423 is located on the high-speed side of planetary gear transmission assembly 1422, when output shaft 1423 encounters resistance, the force outputted outward by input shaft 1421 is greater than the resistance encountered by output shaft 1423. Let the resistance encountered by output shaft 1423 be f, and the force outputted outward by output shaft 1423 be F. Then, F = nf, where n is the speed ratio of planetary gear transmission assembly 1422. In this way, only a small resistance needs to be applied to output shaft 1423 to output a large force. It is understood that to balance the force applied when the slide 122 moves toward the base plate 110, the force outputted outward by the one-way damping device 142 must be equal to the force applied when the slide 122 moves toward the base plate 110. Let the force applied when the slide 122 moves toward the base plate 110 be T, then T = F = nf. It can be imagined that when the slide member 122 tends to approach the base plate 110, the slide member 122 causes the one-way damping device 142 to be subjected to a force T through the transmission device 141, and the force subjected to the input shaft 1421 is T. At this time, the output shaft 1423 is subjected to a force f from the adjusting component 1424, and the input shaft 1421 is subjected to a force nf from the planetary gear transmission component 1422. When nf=T, the one-way damping device 142 can realize the function of preventing the slide member 122 from moving toward the base plate 110.

[0096] Specifically, see 7 to Figure 8Planetary gear transmission assembly 1422 includes an internal gear sleeve 14221. Internal gear sleeve 14221 is cylindrical, with meshing teeth 14222 arranged on its inner ring. The central axis of internal gear sleeve 14221 is collinear with the central axis of input shaft 1421. A first transmission disc 14225 is disposed within internal gear sleeve 14221 and is fixedly connected to the end of input shaft 1421 facing away from transmission device 141. A first gear 14223 is disposed on the side of first transmission disc 14225 facing away from input shaft 1421. First gear 14223 is meshed with at least three first planetary gears 14224, which are meshed with internal gear sleeve 14221. The first planetary gears 14224 are evenly distributed circumferentially along the central axis of input shaft 1421. The first transmission disc 14225 is connected to all the first planetary gears 14224 at the same time. All the first planetary gears 14224 can rotate around their own central axes relative to the first transmission disc 14225. The central axis of the first transmission disc 14225 is collinear with the central axis of the input shaft 1421. A second transmission disc 14228 is mounted on the side of the first gear 14223 facing away from the first transmission disc 14225. The first gear 14223 and the second transmission disc 14228 rotate synchronously. The central axis of the second transmission disc 14228 is collinear with the central axis of the input shaft 1421. A second gear 14226 and at least three second planetary gears 14227 are disposed on the side of the second transmission disc 14228 facing away from the first gear 14223. All of the second planetary gears 14227 are connected to the second transmission disc 14228 and can rotate relative to the second transmission disc 14228 around their own central axes. All of the second planetary gears 14227 are meshed with the internal gear sleeve 14221. The second planetary gears 14227 are evenly distributed circumferentially along the central axis of the input shaft 1421. All second planetary gears 14227 are meshed with the second gear 14226 at the same time, and the second gear 14226 is connected to the output shaft 1423 and rotates synchronously. The central axis of the output shaft 1423 is collinear with the central axis of the input shaft 1421. In this way, the planetary gear transmission assembly 1422 forms a two-stage transmission structure.

[0097] The second transmission disc 14228 can be directly fixedly connected to the output shaft 1423, eliminating the second planetary gear 14227 and the second gear 14226, thereby forming a one-stage speed change structure.

[0098] Of course, the planetary gear transmission assembly 1422 can also be configured to have a three-stage or higher speed transmission structure in the same manner as described above. The greater the number of stages in the planetary gear transmission assembly 1422, the greater the speed ratio of the planetary gear transmission assembly 1422. The speed-changing principle of the planetary gear transmission assembly 1422 is to achieve torque and speed changes by meshing gears with different numbers of teeth. This process is well known to those skilled in the art and will not be described in detail here.

[0099] See also Figures 7 and 8 The adjustment assembly 1424 may include an adjustment seat 14241, a thrust ball bearing 14242 is installed in the adjustment seat 14241, the thrust ball bearing 14242 is sleeved on the output shaft 1423, the thrust ball bearing 14242 rotates synchronously with the output shaft 1423, a spring member 14243 is provided on the side of the thrust ball bearing 14242 away from the output shaft 1423, an adjustment member 14244 is provided on the side of the spring member 14243 away from the thrust ball bearing 14242, the adjustment member 14244 is installed on the end of the output shaft 1423 through a second adjusting screw 14245, the adjustment member 14244 resists the spring member 14243, so that the spring member 14243 is compressed and has elastic potential energy. Turning second adjustment screw 14245 changes the extent to which adjustment member 14244 extends into adjustment seat 14241, thereby changing the compression of spring member 14243 and, consequently, the force acting on thrust ball bearing 14242, thereby changing the force acting on output shaft 1423. In this way, by adjusting the resistance acting on output shaft 1423 through adjustment assembly 1424, one-way damping device 142 can adapt to balancing forces of varying magnitudes. Spring member 14243 is a multi-wave spring.

[0100] Example 4

[0101] Based on the above embodiments 1 to 3, the present application further proposes a calibration method, which is implemented using the calibration device 100 proposed in the present application, and includes the following steps:

[0102] Step 1: Position the slide 122 at the initial position Z0, capture an image of the reference hole 155 in the reference assembly 150 using a camera mounted on the drive shaft to be calibrated, and calculate the center coordinates (X0, Y0) of the reference hole 155;

[0103] Step 2: The drive assembly 130 drives the slide 122 to move to position Z1. At this time, the axis to be calibrated and the slide 122 move the same distance. The camera captures an image of the reference hole 155 at this time, calculates the center coordinate value (X1, Y1) of the reference hole 155, and calculates the coordinate value offset (mX1, mY1) of the reference hole 155 at this time relative to the initial position.

[0104] Step 3: Repeat step 2 and take photos along the moving path of the drive shaft to be tested. When the drive assembly 130 drives the slide member 122 to move to position Zn, the camera captures the image of the reference hole 155 at this time and calculates the center coordinate value (Xn, Yn) of the reference hole 155. The coordinate value offset (mXn, mYn) of the reference hole 155 at this time relative to the initial position is also calculated.

[0105] Step 4: Use the offsets (mX1, mY1) to (mXn, mYn) as the compensation values ​​for calibration, and perform compensation calibration on the coordinates of the drive shaft positions corresponding to the compensation values, so that the coordinate values ​​of each stop position of the drive shaft are equal to the coordinate values ​​of the initial position, that is, the center points of the drive shaft at each stop position are on the same straight line.

[0106] In this way, the calibration of the drive shaft to be measured is completed, so that the moving path of the drive shaft to be measured is a straight line.

[0107] Throughout this specification, references to terms such as "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0108] In addition, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A calibration device, characterized in that include: base plate; An air-floating guide rail assembly, the air-floating guide rail assembly comprising a guide rail member and a slide member, the guide rail member being vertically mounted on the base plate, the guide rail member being adapted to the slide member; A driving assembly, the driving assembly being mounted on the base plate, the slide being fixedly connected to an output end of the driving assembly; a balancing mechanism, the balancing mechanism being fixedly connected to one or both of the slide member and the output end of the drive assembly, the balancing mechanism balancing the force of the slide member when moving toward the base plate, thereby preventing the slide member from moving toward the base plate; as well as A reference assembly, the reference assembly being fixedly mounted on the slide member, the reference assembly being provided with a reference hole, the reference hole being oriented toward an end of the guide rail member away from the base plate; Wherein, the driving assembly drives the slide member to approach or move away from the base plate under the guidance of the guide rail member.

2. The calibration device according to claim 1, characterized in that The base plate is provided with first adjusting screws, the number of the first adjusting screws is at least three, at least three of the first adjusting screws are not collinear, and the first adjusting screws are used to adjust the parallelism of the base plate and the external reference surface.

3. The calibration device according to claim 1, wherein The guide rail member is a rectangular column, and is provided with an inner concave portion and a weight-reducing hole. The inner concave portion is arranged along the length direction of the guide rail member, and the reference assembly is located on the side of the inner concave portion. The weight-reducing hole is cylindrical, and the central axis of the weight-reducing hole is arranged along the length direction of the guide rail member.

4. The calibration device according to claim 3, characterized in that The inner concave portion is in an arc shape, the center of the inner concave portion is located at a corner of the guide rail member, and the symmetry line of the cross section of the inner concave portion is located at the diagonal line of the cross section of the guide rail member.

5. The calibration device according to claim 3, characterized in that The weight-reducing hole includes a first hole and a second hole; The center of the first hole is located on the diagonal line of the cross section of the guide rail member, and a diameter of the first hole is collinear with the symmetry line of the cross section of the inner recess; The second hole is symmetrical along a symmetry line of a cross section of the inner recess, and a diameter of the second hole is collinear with a diameter of the first hole.

6. The calibration device according to claim 1, wherein The driving assembly is a linear motor, and the slide is fixedly connected to the mover of the linear motor.

7. The calibration device according to claim 1, wherein The balancing mechanism comprises: a transmission device fixedly connected to one or both of the slide member and the output end of the drive assembly; and a one-way damping device connected to the transmission device; The one-way damping device is used to balance the force when the slide moves toward the base plate, thereby preventing the slide from moving toward the base plate.

8. The calibration device according to claim 7, characterized in that The transmission device comprises: a support plate mounted on the base plate; and A pulley assembly, the pulley assembly comprising a first pulley, a second pulley, and a transmission belt, the first pulley and the second pulley being mounted on the same side of the support plate, the first pulley and the second pulley supporting the transmission belt, the first pulley being connected to the input end of the one-way damping device, and the transmission belt being fixedly connected to one or both of the slide member and the output end of the drive assembly; When the slide moves toward the base plate, the one-way damping device produces a damping effect on the pulley assembly to prevent the pulley assembly from moving, and through the transmission of the pulley assembly, the slide is prevented from moving toward the base plate.

9. The calibration device according to claim 7, characterized in that The one-way damping device comprises: An input shaft, one end of which is connected to the transmission device via a one-way bearing; a planetary gear transmission assembly, wherein a low-speed side of the planetary gear transmission assembly is connected to an end of the input shaft facing away from the transmission device; an output shaft, one end of which is connected to the high-speed side of the planetary gear transmission assembly; and an adjusting assembly connected to an end of the output shaft facing away from the planetary gear speed change assembly, the adjusting assembly being used to apply a damping force to the output shaft; The resistance of the output shaft during rotation is adjusted by twisting the adjustment assembly.

10. A calibration method, characterized in that: The method is implemented by applying the calibration device according to any one of claims 1 to 9, comprising the following steps: Step 1: Position the slide at an initial position Z0, capture an image of the reference hole in the reference assembly at this time using a camera mounted on the drive shaft to be calibrated, and calculate the center coordinate value (X0, Y0) of the reference hole; Step 2: The driving assembly drives the slide to move to position Z1. At this time, the axis to be calibrated and the slide move the same distance. The camera captures the image of the reference hole at this time, and calculates the coordinate value (X1, Y1) of the center of the reference hole at this time. The offset (mX1, mY1) of the coordinate value of the reference hole at this time relative to the initial position is also calculated. Step 3: Repeat step 2 and take pictures in sequence along the moving path of the drive shaft to be tested. When the drive assembly drives the slide to move to position Zn, the camera captures the image of the reference hole at this time and calculates the coordinate value (Xn, Yn) of the center of the reference hole at this time, and calculates the coordinate value offset (mXn, mYn) of the reference hole relative to the initial position. Step 4: Use the offsets (mX1, mY1) to (mXn, mYn) as the compensation values ​​for calibration, and perform compensation calibration on the coordinates of the drive shaft positions corresponding to the compensation values, so that the coordinate values ​​of each stop position of the drive shaft are equal to the coordinate values ​​of the initial position, that is, the center points of the drive shaft at each stop position are on the same straight line.

Images