Flatness measuring instrument with image positioning function

Abstract

The utility model relates to the technical field of optical metering equipment, in particular to a flatness measuring instrument with image positioning, which comprises a case, a workbench and a detection mechanism, and the detection mechanism comprises a Y-axis screw rod assembly, an X-axis screw rod assembly and a Z-axis screw rod assembly; a CCD system is arranged on the Z-axis lead screw assembly and comprises a camera and an illumination assembly which are fixed to the Z-axis sliding plate in the same vertical direction, and the illumination assembly is located below the camera and comprises a positioning plate fixed to the Z-axis sliding plate and a light source fixed to the lower portion of the positioning plate. The positioning plate comprises a square plate and an annular plate which are integrally formed, and a strip-shaped hole is formed in the square plate; the light source structure is annular and is horizontally fixed below the annular plate through screws, and the installation position of the camera and the center of an inner hole of the light source are on the same axis. According to the device, the optimal illumination effect can be conveniently adjusted, the contrast and definition of the image are improved, and the measurement efficiency and the detection precision are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical metrology equipment, in particular to a flatness measuring instrument with image positioning. Background Technique

[0002] Flatness refers to the deviation degree between the surface of an object and an ideal plane, which is an important indicator for measuring the flatness of the object surface and involves multiple fields such as machining, precision manufacturing, optical devices, and electronic components. Since flatness directly affects the performance, assembly, and service life of products, it is crucial to detect flatness for many industries.

[0003] Flatness is usually measured by a flatness measuring instrument. A flatness measuring instrument is a non-contact measuring device that can collect and calculate the surface shape contour of an object through high-precision sensors and optical principles, and obtain the flatness value through quantization processing to help engineers and quality inspectors determine whether the product quality meets the requirements. For example, in the prior art "A High-Speed Flatness Detector" (Publication No.: CN203785643U), its main core components are a CCD system and a laser sensor. The CCD system consists of an image acquisition device and a light source, and the light source is located below the image acquisition device. The image acquisition device is used to collect the global image of the object to be measured, that is, to take an image of the entire detection area. The light source is used to provide illumination to improve the image capture effect. Then, the software analyzes and identifies the image to extract the contour of the product surface to locate the position coordinates of the object to be measured. After obtaining the coordinates according to the CCD system, the laser sensor can accurately move above the object to be measured and emit laser light onto the surface of the object to be measured. According to the optical path difference, angle change, time, etc. of the laser light reflected back, the specific coordinate data of the surface contour of the object to be measured can be analyzed and calculated, so as to construct a three-dimensional model, and then the software calculates and measures the flatness, height step difference, warpage degree and other dimensions of the object to be measured to quickly obtain the required results. However, the prior art still has the following technical problems:

[0004] When collecting images, since the shape, height and other parameters of different objects to be measured are different, it is usually necessary to appropriately adjust the height of the light source so that when the light source irradiates the object to be measured, it reaches the appropriate brightness and intensity, improves the image collection clarity, and improves the final detection result. However, in the prior art, the image acquisition device and the light source are integrally arranged, but the lighting effect is affected by the distance between the light source and the image acquisition device and the distance between the light source and the object to be measured. In the prior art, the height of the light source between the object to be measured and the image acquisition device cannot be adjusted, and it is difficult to achieve the optimal lighting effect. When detecting different objects, it is easy to cause the clarity of the collected graphics to decrease due to insufficient or excessive brightness of the light source, resulting in inaccurate detection results. Content of the Utility Model

[0005] The utility model provides a flatness measuring instrument with image positioning, which can solve the problem that the light source of the existing flatness detector cannot adjust the vertical height, easily resulting in inaccurate final detection results due to insufficient or excessive brightness of the light source.

[0006] The present application provides the following technical solutions: a flatness measuring instrument with image positioning, including a chassis, a workbench fixed on the chassis, and a detection mechanism fixed on the workbench. The detection mechanism includes a Y-axis lead screw assembly fixed on the workbench, an X-axis lead screw assembly slidably connected to the Y-axis lead screw assembly, and a Z-axis lead screw assembly slidably connected to the X-axis lead screw assembly;

[0007] A Z-axis slide plate is slidably connected to the Z-axis lead screw assembly. A CCD system is provided on the Z-axis slide plate. The CCD system includes a camera and a lighting component fixed on the Z-axis slide plate in the same vertical direction. The lighting component is located below the camera. The lighting component includes a positioning plate fixed on the Z-axis slide plate and a light source fixed below the positioning plate;

[0008] The positioning plate includes an integrally formed square plate and a circular ring plate. The square plate is vertically arranged, and the circular ring plate is horizontally arranged. A strip hole is provided on the square plate, and a screw is passed through the strip hole to fix the square plate on the Z-axis slide plate;

[0009] The light source structure is annular and is horizontally fixed below the circular ring plate. The installation position of the camera is on the same axis as the center of the inner hole of the light source.

[0010] Beneficial effects:

[0011] Improve the lighting effect and the detection result. The positioning plate is composed of a square plate and a circular ring plate. The light source is horizontally fixed below the circular ring plate, and the strip hole on the square plate facilitates the vertical adjustment of the position of the square plate on the Z-axis slide plate, so as to be able to adjust the vertical distance between the light source and the object to be measured and the camera, which helps to focus the light of the light source on the appropriate point according to different objects and adjust to the best lighting effect, improving the contrast and clarity of the image, thereby improving the accuracy of detection or measurement. At the same time, the light source structure is annular, and the installation position of the camera of the CCD system is on the same axis as the center of the inner hole of the light source, which can reduce the shadow on the object to be measured, enable the light source to irradiate the object to be measured vertically and evenly, the image of the object to be measured collected by the camera through the inner hole of the light source is clearer, the image quality is higher, and the final detection result is more accurate, effectively improving the detection accuracy.

[0012] Further, a laser sensor is also fixed on the Z-axis slide plate, and the laser sensor is located on one side of the positioning plate.

[0013] Beneficial effects: The laser sensor is arranged on one side of the positioning plate, which can avoid blocking the acquisition view angle of the CCD system. At the same time, when used together with the CCD system and the annular light source, it can quickly move above the object for automatic positioning and measurement, improving the detection efficiency.

[0014] Furthermore, the Y-axis lead screw assembly includes a Y-axis slide rail fixed on the workbench, a Y-axis motor located on one side of the Y-axis slide rail, a Y-axis fixed seat arranged opposite to the Y-axis motor, a Y-axis lead screw rotatably connected between the Y-axis motor and the Y-axis fixed seat, a Y-axis connecting block threadedly connected to the rod portion of the Y-axis lead screw, and an X-axis cross beam fixed above the Y-axis connecting block; the X-axis cross beam is vertically arranged in a cross shape with the Y-axis slide rail, the Y-axis lead screw is arranged parallel to the Y-axis slide rail, and a base is further fixed below the X-axis cross beam, and the base is slidably connected to the Y-axis slide rail.

[0015] Beneficial effects: By driving the Y-axis lead screw to rotate through the Y-axis motor, the Y-axis connecting block can be driven to pull the X-axis cross beam to slide on the Y-axis slide rail, facilitating the precise movement and positioning of the X-axis cross beam and the mechanisms above it in the Y-axis direction.

[0016] Furthermore, the X-axis lead screw assembly includes an X-axis motor located above the X-axis cross beam, an X-axis fixed seat arranged opposite to the X-axis motor, an X-axis lead screw rotatably connected between the X-axis motor and the X-axis fixed seat, an X-axis connecting block threadedly connected to the rod portion of the X-axis lead screw, and an X-axis slide rail fixed on the X-axis cross beam, and the X-axis slide rail is located on both sides of the X-axis lead screw.

[0017] Beneficial effects: By driving the X-axis lead screw to rotate through the X-axis motor, the X-axis connecting block can be driven to move along the axial direction of the X-axis lead screw, thereby facilitating the precise movement and positioning of the mechanism parts above the X-axis connecting block in the X-axis direction.

[0018] Furthermore, an installation platform is arranged above the X-axis cross beam, and the installation platform includes a horizontally arranged bottom plate, a mounting plate vertically fixed on the bottom plate, and a reinforcing rib fixed between the bottom plate and the mounting plate; the center of the bottom of the bottom plate is fixed to the X-axis connecting block, and both sides of the bottom of the bottom plate are slidably connected to the X-axis slide rail.

[0019] Beneficial effects: The reinforcing rib is used to enhance the stability of the installation platform, and the bottom plate can be horizontally moved along the X-axis cross beam under the traction of the X-axis connecting block, thereby realizing the horizontal movement of the entire installation platform.

[0020] Further, the Z-axis lead screw assembly includes a Z-axis motor fixed on the mounting plate, a Z-axis fixed seat disposed opposite to the Z-axis motor, a Z-axis lead screw rotatably connected between the Z-axis motor and the Z-axis fixed seat, a Z-axis connecting block threadedly connected to the rod portion of the Z-axis lead screw, and a Z-axis slide rail fixed on the mounting plate. The Z-axis slide rail is located on both sides of the Z-axis lead screw. The center of the bottom of the Z-axis slide plate is fixed to the Z-axis connecting block, and both sides of the bottom of the Z-axis slide plate are slidably connected to the Z-axis slide rail.

[0021] Beneficial effects: By driving the Z-axis lead screw to rotate with the Z-axis motor, the Z-axis connecting block can be driven to move axially along the Z-axis lead screw, thereby facilitating the precise movement and positioning of the mechanism above the X-axis connecting block in the X-axis direction.

[0022] Further, both the camera and the laser sensor are fixed on the Z-axis slide plate through locking members. The locking members include a support seat screw-connected to the Z-axis slide plate and a locking cover screw-connected to the support seat. Semi-circular grooves are provided on both the support seat and the locking cover. After the locking cover is fixed to the support seat, the semi-circular grooves combine into a circular groove to tightly hold and fix the rod portions of the camera and the laser sensor.

[0023] Beneficial effects: The locking members ensure the stable installation of the camera and the laser sensor on the Z-axis slide plate. Even during precise movement in the Z-axis direction, the position of the sensor can be maintained unchanged, which helps to improve the detection accuracy. Description of the Drawings

[0024] Figure 1 Isometric view of the present utility model.

[0025] Figure 2 Is Figure 1 Isometric view after removing the chassis.

[0026] Figure 3 Is Figure 2 Directional view in the A direction of

[0027] Figure 4 Is Figure 2 Enlarged view of the Z-axis lead screw assembly in

[0028] Figure 5 Is Figure 4 Isometric view after removing the Z-axis slide plate, CCD system and laser sensor in

[0029] Figure 6 Is Figure 4 Enlarged view of the locking member in Detailed Description of the Preferred Embodiment

[0030] The following is a more detailed description through specific embodiments:

[0031] The reference signs in the accompanying drawings of the specification include: workbench 1, Y-axis slide rail 2, Y-axis motor 3, Y-axis lead screw 4, Y-axis connecting block 5, X-axis cross beam 6, base 61, X-axis motor 7, X-axis lead screw 8, X-axis connecting block 9, bottom plate 10, reinforcing rib 11, mounting plate 12, Z-axis motor 13, Z-axis slide rail 14, Z-axis slide plate 15, camera 16, laser sensor 17, light source 18, Z-axis lead screw 19, Z-axis connecting block 20, chassis 21, X-axis slide rail 22, X-axis fixing seat 23, Y-axis fixing seat 24, positioning plate 25, support 26, locking cover 27, strip hole 28, Z-axis fixing seat 29.

[0032] Embodiment 1

[0033] As Figures 1 to 6 shown, a flatness measuring instrument with image positioning includes a chassis 21, a workbench 1 fixed on the chassis 21, and a detection mechanism fixed on the workbench 1. The detection mechanism includes a Y-axis lead screw assembly fixed on the workbench 1, an X-axis lead screw assembly slidably connected to the Y-axis lead screw assembly, and a Z-axis lead screw assembly slidably connected to the X-axis lead screw assembly.

[0034] As Figure 2 and Figure 3 shown, the Y-axis lead screw assembly includes two Y-axis slide rails 2 fixed on the workbench 1, a Y-axis motor 3 located on one side of the Y-axis slide rails 2, a Y-axis fixing seat 24 disposed opposite to the Y-axis motor 3, a Y-axis lead screw 4 rotatably connected between the Y-axis motor 3 and the Y-axis fixing seat 24, a Y-axis connecting block 5 threadedly connected to the rod portion of the Y-axis lead screw 4, and an X-axis cross beam 6 located above the Y-axis connecting block 5. The bottom of one end of the X-axis cross beam 6 close to the Y-axis lead screw 4 is fixed to the Y-axis connecting block 5; and the Y-axis lead screw 4 and the Y-axis slide rails 2 are arranged in parallel, the X-axis cross beam 6 and the Y-axis slide rails 2 are arranged perpendicularly in a cross shape, and two bases 61 are further fixed to both sides below the X-axis cross beam 6, and the two bases 61 are respectively slidably connected to the two Y-axis slide rails 2.

[0035] The X-axis lead screw assembly includes an X-axis motor 7 located above the X-axis cross beam 6, an X-axis fixing seat 23 disposed opposite to the X-axis motor 7, an X-axis lead screw 8 rotatably connected between the X-axis motor 7 and the X-axis fixing seat 23, an X-axis connecting block 9 threadedly connected to the rod portion of the X-axis lead screw 8, and two X-axis slide rails 22 fixed on the X-axis cross beam 6. The cross section of the X-axis cross beam 6 is in a groove shape, the X-axis motor 7, the X-axis fixing seat 23 and the X-axis lead screw 8 are all located in the groove, and the two X-axis slide rails 22 are respectively located above the X-axis cross beam 6 on both sides of the X-axis lead screw 8.

[0036] As Figure 3As shown in the figure, there is an installation platform above the X-axis crossbeam 6. The installation platform includes a horizontally arranged bottom plate 10, a mounting plate 12 vertically fixed on the bottom plate 10, and a reinforcing rib 11 fixed between the bottom plate 10 and the mounting plate 12. The reinforcing rib 11 is a right-angled triangular frame plate, and the two right-angled sides of the reinforcing rib 11 are respectively fixed to the bottom plate 10 and the mounting plate 12; the center of the bottom of the bottom plate 10 is fixed above the X-axis connecting block 9, and both sides of the bottom of the bottom plate 10 are slidably connected to the X-axis slide rail 22.

[0037] As Figure 4 and Figure 5 shown in the figure, the Z-axis lead screw assembly includes a Z-axis motor 13 fixed on the mounting plate 12, a Z-axis fixed seat 29 arranged opposite to the Z-axis motor 13, a Z-axis lead screw 19 rotatably connected between the Z-axis motor 13 and the Z-axis fixed seat 29, a Z-axis connecting block 20 threadedly connected to the rod portion of the Z-axis lead screw 19, and two Z-axis slide rails 14 fixed on the mounting plate 12. The Z-axis slide rails 14 are located on both sides of the Z-axis lead screw 19, and a Z-axis slide plate 15 is slidably connected to the two Z-axis slide rails 14. The center of the bottom of the Z-axis slide plate 15 is fixedly connected to the Z-axis connecting block 20 by screws.

[0038] As Figure 2 and Figure 4 shown in the figure, a CCD system is provided on the Z-axis slide plate 15. The CCD system includes a camera 16 and a lighting component fixed on the Z-axis slide plate 15 in the same vertical direction. The lighting component is located below the camera 16. The lighting component includes a positioning plate 25 fixed on the Z-axis slide plate 15 and a light source 18 fixed below the positioning plate 25; the positioning plate 25 includes an integrally formed square plate and a circular ring plate. The square plate is vertically arranged, and the circular ring plate is horizontally arranged. A strip hole 28 is provided on the square plate, and a screw is passed through the strip hole 28 to fix the square plate on the Z-axis slide plate 15; the structure of the light source 18 is annular and is horizontally fixed below the circular ring plate by screws. The installation position of the camera 16 is on the same axis as the center of the inner hole of the light source 18; a laser sensor 17 is also fixed on one side of the positioning plate 25. The laser sensor 17 is a coaxial laser sensor. As Figure 4 shown in the figure, both the camera 16 and the laser sensor 17 are fixed on the Z-axis slide plate 15 through locking parts. The structure of the locking parts is as Figure 6 shown in the figure, and it includes a support 26 screwed to the Z-axis slide plate 15 and a locking cover 27 screwed to the support 26. Semi-circular grooves are provided on both the support 26 and the locking cover 27. After the locking cover 27 is screwed to the support 26, the semi-circular grooves are combined into a circular groove to tightly hold and fix the rod parts of the camera 16 and the laser sensor 17.

[0039] The detection method of this instrument is as follows:

[0040] Place the DUT on the working platform, control the Y-axis motor 3 to drive the X-axis crossbeam 6 to slide on the Y-axis slide rail 2, control the X-axis motor 7 to drive the X-axis connecting block 9 and the entire upper mounting table to slide on the X-axis slide rail 22, and control the Z-axis motor 13 to drive the Z-axis slide plate 15 to slide on the Z-axis slide rail 14, so that the camera 16 moves above the DUT and collects images and coordinates of the DUT. According to the differences in the shape and height of the DUT, the screws for locking the positioning plate 25 can be loosened, and the distance between the light source 18 and the DUT and the camera 16 can be adjusted. The light of the light source 18 is focused on the appropriate point according to different DUTs, adjusted to the best lighting effect, the contrast and clarity of the image are improved, and thus the accuracy of detection or measurement is improved. After the measurement coordinate position is selected through the CCD system, the measurement software will control the laser sensor 17 to automatically move to the corresponding position to take points according to the coordinates obtained by the CCD system, and finally calculate all the measurement points through the software and output the required measurement dimensions.

[0041] The above are only the embodiments of the present invention. The present invention is not limited to the fields involved in this embodiment. Common knowledge such as the specific structures and characteristics known in the solutions is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A flatness measuring instrument with image positioning, comprising a chassis, a workbench fixed on the chassis and a detection mechanism fixed on the workbench, the detection mechanism comprising a Y-axis screw assembly fixed on the workbench, an X-axis screw assembly slidably connected to the Y-axis screw assembly and a Z-axis screw assembly slidably connected to the X-axis screw assembly; characterized in that: The Z-axis lead screw assembly is slidably connected to a Z-axis slide, the Z-axis slide is provided with a CCD system, the CCD system comprises a camera and a lighting assembly fixed on the Z-axis slide in the same vertical direction, the lighting assembly is located below the camera, and the lighting assembly comprises a positioning plate fixed on the Z-axis slide and a light source fixed below the positioning plate; The positioning plate includes an integrally formed square plate and a circular plate, the square plate is vertically arranged, the circular plate is horizontally arranged, the square plate is provided with a strip hole, and screws are inserted into the strip hole to fix the square plate on the Z-axis slide plate; The light source structure is annular and is horizontally fixed below the circular ring plate by screws. The installation position of the camera is on the same axis as the center of the inner hole of the light source.

2. A flatness measuring instrument with image positioning according to claim 1, characterized in that: A laser sensor is also fixed on the Z-axis slide plate, and the laser sensor is located on one side of the positioning plate.

3. A flatness measuring instrument with image positioning according to claim 2, characterized in that: The Y-axis screw assembly includes a Y-axis slide rail fixed on the workbench, a Y-axis motor located on one side of the Y-axis slide rail, a Y-axis fixing seat arranged opposite to the Y-axis motor, a Y-axis screw rotatably connected between the Y-axis motor and the Y-axis fixing seat, a Y-axis connecting block threadedly connected to the rod portion of the Y-axis screw rod, and an X-axis crossbeam fixed above the Y-axis connecting block; the X-axis crossbeam and the Y-axis slide rail are vertically arranged in a cross shape, the Y-axis screw rod and the Y-axis slide rail are arranged in parallel, and a base is also fixed under the X-axis crossbeam, and the base is slidably connected to the Y-axis slide rail.

4. The flatness measuring instrument with image positioning according to claim 3, characterized in that: The X-axis screw assembly includes an X-axis motor located above the X-axis crossbeam, an X-axis fixed seat arranged opposite to the X-axis motor, an X-axis screw rotatably connected between the X-axis motor and the X-axis fixed seat, an X-axis connecting block threadedly connected to the rod portion of the X-axis screw, and an X-axis slide rail fixed on the X-axis crossbeam, wherein the X-axis slide rail is located on both sides of the X-axis screw.

5. The flatness measuring instrument with image positioning according to claim 4, characterized in that: A mounting platform is provided above the X-axis crossbeam, and the mounting platform includes a horizontally arranged base plate, a mounting plate vertically fixed on the base plate, and reinforcing ribs fixed between the base plate and the mounting plate; the bottom center of the base plate is fixed to the X-axis connecting block, and the bottom sides of the base plate are slidably connected to the X-axis slide rails.

6. The flatness measuring instrument with image positioning according to claim 5, characterized in that: The Z-axis screw assembly includes a Z-axis motor fixed on a mounting plate, a Z-axis fixing seat arranged opposite to the Z-axis motor, a Z-axis screw rotatably connected between the Z-axis motor and the Z-axis fixing seat, a Z-axis connecting block threadedly connected to the rod portion of the Z-axis screw, and a Z-axis slide rail fixed on the mounting plate, wherein the Z-axis slide rail is located on both sides of the Z-axis screw, the bottom center of the Z-axis slide plate is fixed to the Z-axis connecting block, and the bottom sides of the Z-axis slide plate are slidably connected to the Z-axis slide rail.

7. The flatness measuring instrument with image positioning according to claim 6, characterized in that: The camera and laser sensor are both fixed on the Z-axis slide plate by a locking piece, and the locking piece includes a support screwed to the Z-axis slide plate and a locking cover screwed to the support, and both the support and the locking cover are provided with semicircular grooves. After the locking cover is fixed to the support, the semicircular grooves are combined into a circular groove to hold and fix the rods of the camera and the laser sensor.

Images