Automatic CCD calibration mechanism

Abstract

The utility model discloses an automatic CCD (Charge Coupled Device) calibration mechanism which comprises a processing seat, a guide rail and a workpiece, a support is fixedly installed on one side of the top of the machining base through bolts, a guide rail is fixedly installed on the upper portion of the front wall of the support, a sliding block is slidably installed in the guide rail, a movable base is fixedly installed on the front wall of the sliding block, a drag chain is fixedly installed on the top of the support, and an L-shaped support is fixedly installed on the top of the rear wall of the movable base. A CCD camera is fixedly installed at the other end of the L-shaped support and located on the rear side of the drag chain, a positioning table is installed at the top of the machining base and located below the support, and the workpiece is arranged above the positioning table. According to the automatic CCD calibration mechanism, the CCD camera and the sliding block can be integrated, automatic and accurate adjustment of the transverse position of the camera is achieved, the calibration precision and the working efficiency are greatly improved, and the stability and the reliability of equipment are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic detection and calibration, in particular to an automatic CCD calibration mechanism. Background Art

[0002] In the field of modern industrial manufacturing, with the continuous improvement of product precision requirements and the acceleration of automated production processes, the precise calibration and inspection of workpieces have become increasingly critical. Traditional calibration methods often rely on manual operation of measurement tools, such as using calipers and micrometers to measure and adjust the size and position of workpieces. This manual calibration method has many disadvantages. First, its efficiency is extremely low. Especially in large-scale production or continuous calibration of multiple workpieces, the time cost required for manual operation will significantly reduce production efficiency, making it difficult to meet the pace of modern high-speed production. Second, the accuracy of manual calibration is limited by factors such as the operator's skill level, working status, and visual fatigue. It is difficult to guarantee the accuracy and consistency of each measurement and adjustment, which can easily lead to uneven product quality, increased scrap rate and rework costs.

[0003] With the development of automation technology and optical imaging technology, CCD cameras have gradually been used in the field of industrial inspection. However, existing CCD cameras are often fixed in a specific position during use. When calibration inspection is required for workpieces in different positions or of different types, the position of the CCD camera needs to be manually adjusted. This manual adjustment method is not only cumbersome to operate, but also difficult to achieve high-precision positioning during the adjustment process. It is easy to introduce additional errors and cannot fully utilize the advantages of CCD cameras in image acquisition and measurement.

[0004] Therefore, how to provide an automatic CCD calibration mechanism is a problem that those skilled in the art urgently need to solve. Utility Model Content

[0005] One purpose of the present invention is to propose an automatic CCD calibration mechanism. The present invention can integrate a CCD camera and a slider into the automatic CCD calibration mechanism, which not only realizes automatic and precise adjustment of the camera's lateral position, greatly improves calibration accuracy and work efficiency, but also enhances equipment stability and reliability.

[0006] The automatic CCD calibration mechanism according to the embodiment of the utility model includes a processing base, a guide rail and a workpiece;

[0007] A bracket is fixedly installed on one side of the top of the processing seat by bolts, a guide rail is fixedly installed above the front wall of the bracket, a slider is slidably installed in the guide rail, a movable seat is fixedly installed on the front wall of the slider, a drag chain is fixedly installed on the top of the bracket, an L-shaped bracket is fixedly installed on the top of the rear wall of the movable seat, a CCD camera is fixedly installed on the other end of the L-shaped bracket and located behind the drag chain, a positioning table is installed on the top of the processing seat and below the bracket, and the workpiece is placed above the positioning table. The processing seat is made of high-strength aluminum alloy material, which has the characteristics of light weight and good rigidity. It can effectively reduce the vibration of the mechanism during operation and provide a stable installation foundation for each component. The bracket is tightly connected to the processing seat after precision machining to ensure that the verticality and parallelism of the guide rail installation meet the requirements of high-precision calibration. The surface of the positioning table has been specially treated to have certain anti-slip and wear resistance, which prevents the workpiece from displacement during the positioning process and can maintain a good working condition for a long time.

[0008] Furthermore, a stepper motor is fixedly mounted on the side wall of the guide rail, a screw is rotatably mounted in the guide rail, the screw passes through the slider, and the screw is threadedly connected to the slider, and the output shaft of the stepper motor is connected to the screw. The stepper motor uses a high-precision subdivision stepper motor with a small step angle, which can achieve precise micro-step control. Its drive controller can accurately control the speed, direction and number of steps of the motor according to the preset motion program. The screw adopts a high-precision ball screw with a low friction coefficient and high transmission efficiency. It can effectively reduce energy loss and heat generation during movement, ensure the smooth movement and positioning accuracy of the slider on the guide rail, and its lead is optimized to meet the requirements of different speeds and precision of the mechanism.

[0009] Furthermore, a connecting frame is fixedly mounted on top of the movable seat, and its top end is fixedly connected to the drag chain. Made of stainless steel, the connecting frame offers excellent corrosion resistance and high strength. Its streamlined design ensures a secure connection with the drag chain and movable seat while minimizing the effects of air resistance on the movable seat's movement. The connection point between the connecting frame and the drag chain utilizes an adjustable fastening device, facilitating adjustment of the drag chain's tightness during installation and commissioning, ensuring the chain remains in proper working condition and extending its service life.

[0010] Furthermore, a lifting seat is slidably mounted on the front side of the movable seat, and an electric push rod is provided inside the movable seat, and the bottom end of the electric push rod is fixedly connected to the lifting seat. A high-precision linear guide pair is provided on the front side of the movable seat to provide stable and precise guidance for the up and down sliding of the lifting seat. The linear guide pair is made of high-quality steel, and the surface is quenched and ground, with high hardness and good wear resistance, which ensures the movement accuracy and reliability of the lifting seat during frequent lifting. The electric push rod has an overload protection function. When encountering external force obstruction or exceeding the rated load, it can automatically stop working and issue an alarm signal to prevent equipment damage. Its stroke can be precisely adjusted according to actual needs, and it has good speed control characteristics, which can achieve smooth acceleration, uniform speed and deceleration movement of the lifting seat.

[0011] Furthermore, the CCD camera is mounted vertically, with the CCD camera lens facing downward toward the positioning stage and the workpiece. The CCD camera uses a high-pixel, high-frame-rate industrial-grade camera with low noise and a high dynamic range, enabling it to clearly capture subtle features and defects on the workpiece surface. Its lens utilizes a high-resolution, low-distortion optical lens, and the focal length can be adjusted according to the size of the workpiece and the working distance, ensuring that the captured image fully and accurately reflects the overall appearance of the workpiece. The CCD camera is also equipped with autofocus and autoexposure functions, which automatically optimize shooting parameters based on different lighting conditions and the reflective properties of the workpiece surface, ensuring the stability and consistency of image quality.

[0012] Furthermore, the front wall of the lift base is provided with mounting holes, through which the handling mechanism can be fixedly mounted at the front end of the lift base. The mounting holes on the front wall of the lift base utilize a standardized design, with evenly distributed holes and high positioning accuracy, facilitating the quick and accurate installation of handling mechanisms of varying models and specifications. Ribs are provided around the mounting holes to enhance the strength and rigidity of this area to withstand the various forces and moments generated by the handling mechanism during operation. The handling mechanism can utilize a variety of forms, including mechanical grippers and vacuum suction cups, and can be flexibly selected and configured based on factors such as the shape, material, and weight of the workpiece, enabling efficient and safe handling and position adjustment of the workpiece.

[0013] The beneficial effects of the utility model are:

[0014] The utility model realizes the automatic lateral position adjustment shooting function by integrating the CCD camera with the slider. The integrated design of the CCD camera and the slider enables the camera to automatically change the shooting position as the slider moves laterally on the guide rail, which solves the problem that traditional calibration equipment requires manual adjustment of the position of the CCD camera to align this process. There is no need for frequent manual adjustment, and the rotation of the screw rod is accurately controlled by the stepping motor, thereby driving the slider and the camera to move smoothly. The workpiece can be accurately photographed at different lateral coordinate points according to preset programs and parameters, which greatly improves the accuracy and repeatability of the shooting position, effectively reduces the calibration deviation caused by inconsistent manual adjustment, and significantly improves the quality and reliability of the calibration work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the front overall structure of the automatic CCD calibration mechanism proposed in the utility model;

[0017] Figure 2 This is a schematic diagram of the overall rear-view structure of the automatic CCD calibration mechanism proposed in the present invention;

[0018] Figure 3 This is a front view structural diagram of the automatic CCD calibration mechanism proposed in the present invention;

[0019] Figure 4 This is a side structural schematic diagram of the automatic CCD calibration mechanism proposed in the utility model.

[0020] In the figure: 1. Processing base; 2. Bracket; 3. Drag chain; 4. Guide rail; 5. Slider; 6. Movable base; 7. Lifting base; 8. Positioning table; 9. Workpiece; 10. Connecting frame; 11. Stepper motor; 12. Screw; 13. L-shaped bracket; 14. CCD camera; 15. Electric push rod. DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0022] refer to Figure 1-4 , an automatic CCD calibration mechanism, comprising a processing seat 1, a guide rail 4 and a workpiece 9;

[0023] A bracket 2 is fixedly installed on one side of the top of the processing seat 1 by bolts, a guide rail 4 is fixedly installed on the front wall of the bracket 2, a slider 5 is slidably installed in the guide rail 4, and a movable seat 6 is fixedly installed on the front wall of the slider 5;

[0024] The side wall of the guide rail 4 is fixedly mounted with a stepper motor 11, and a screw rod 12 is rotatably mounted in the guide rail 4. The screw rod 12 passes through the slider 5 and is threadedly connected to the slider 5. The output shaft of the stepper motor 11 is in transmission connection with the screw rod 12.

[0025] Secondly, a lifting seat 7 is slidably mounted on the front side of the movable seat 6, and an electric push rod 15 is provided inside the movable seat 6, and the bottom end of the electric push rod 15 is fixedly connected to the lifting seat 7;

[0026] In addition, the front wall of the lifting seat 7 is provided with a mounting hole, and the front end of the lifting seat 7 can be fixed with a transport mechanism through the mounting hole;

[0027] In this embodiment, the stepper motor 11 drives the lead screw 12 to rotate, thereby driving the slider 5 to move laterally along the guide rail 4, thereby adjusting the lateral position of the movable seat 6 and the components thereon. The electric push rod 15 can push the lifting seat 7 to slide up and down in front of the movable seat 6 to achieve height adjustment, and a conveying mechanism can be installed at the front end of the lifting seat 7 as needed to facilitate conveying and processing of the workpiece 9.

[0028] refer to Figure 1-4 A drag chain 3 is fixedly installed on the top of the bracket 2, an L-shaped bracket 13 is fixedly installed on the top of the rear wall of the movable seat 6, a CCD camera 14 is fixedly installed on the other end of the L-shaped bracket 13 and located behind the drag chain 3, a positioning table 8 is installed on the top of the processing seat 1 and below the bracket 2, and the workpiece 9 is placed above the positioning table 8;

[0029] A connecting frame 10 is fixedly installed on the top of the movable seat 6, and the top of the connecting frame 10 is fixedly connected to the drag chain 3;

[0030] Secondly, the CCD camera 14 is installed vertically, and the lens of the CCD camera 14 is directed downward toward the positioning platform 8 and the workpiece 9;

[0031] In this embodiment, the drag chain 3 is used to protect the cables related to the movable seat 6 so that they will not be entangled or have other problems during the movement of the movable seat 6. The connecting frame 10 ensures the stability of the connection between the movable seat 6 and the drag chain 3. The CCD camera 14 is installed longitudinally with the lens facing downward towards the positioning table 8 and the workpiece 9, and can capture images of the workpiece 9 on the positioning table 8 for subsequent calibration and other operations.

[0032] Working principle: First, place the workpiece 9 on the positioning table 8, and then start the stepper motor 11. The stepper motor 11 accurately drives the screw 12 to rotate according to the preset pulse signal. The threaded connection between the screw 12 and the slider 5 converts the rotational motion into a linear lateral movement of the slider 5 along the guide rail 4, thereby driving the movable seat 6 and the components thereon to achieve precise adjustment of the lateral position according to the set speed and displacement. During the lateral movement, the drag chain 3 extends or contracts accordingly with the movement of the movable seat 6, and the connecting frame 10 ensures the stable connection between the drag chain 3 and the movable seat 6. Solidity, to avoid affecting the movement accuracy of the movable seat 6 or causing damage to the cable due to the pulling of the drag chain 3. When the movable seat 6 moves horizontally to the preset approximate position, the electric push rod 15 receives the control signal and starts working. The motor inside it drives the push rod to extend or retract, so that the lifting seat 7 slides up and down smoothly along the specific guide structure in front of the movable seat 6, and realizes fine adjustment in the height direction with millimeter-level or even higher accuracy. The CCD camera 14 is installed vertically with the lens facing downward to the positioning table 8 and the workpiece 9, and can move horizontally with the slider 5. The CCD camera 14 is at a certain The image of the workpiece 9 is captured at a frame rate and resolution of 1000 frames per second, and the optical signal is converted into an electrical signal and transmitted to the image processing unit. The image processing unit pre-processes the captured image, such as grayscale conversion, filtering and denoising, to improve the image quality. Then, image recognition algorithms, such as edge detection and feature extraction, are used to identify the key contours, feature points and other information of the workpiece 9. This information is compared and analyzed with the standard workpiece model data pre-stored in the system to calculate the position deviation and shape and size deviation of the workpiece 9 in the plane coordinates. If there is a deviation in the workpiece 9, the control system plans the motion path and action strategy of the handling mechanism based on the analysis results. The handling mechanism performs the corresponding action according to the instruction, such as through multi-axis linkage, using components such as robotic arms or grippers to apply precise force and displacement to the workpiece 9, adjusting the workpiece 9 to the correct position and posture, thereby realizing the automatic CCD calibration function. During the entire process, the motion parameters between the components, image acquisition and processing data, calibration results and other information can be monitored and recorded in real time to facilitate subsequent quality traceability, process optimization and equipment maintenance.

[0033] It is understood that the stepper motor, electric linear actuator, and CCD camera in the present invention can be driven by an external power cord and can be programmably controlled by a master control system. The control principles are achievable using existing control technology. The stepper motor, electric linear actuator, and CCD camera are not limited to a single type and can be any commercially available type suitable for the present invention.

[0034] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Automatic CCD calibration mechanism, characterized in that, It includes a processing seat (1), a guide rail (4) and a workpiece (9); A bracket (2) is fixedly installed on one side of the top of the processing seat (1) by bolts, a guide rail (4) is fixedly installed on the top of the front wall of the bracket (2), a slider (5) is slidably installed in the guide rail (4), a movable seat (6) is fixedly installed on the front wall of the slider (5), a drag chain (3) is fixedly installed on the top of the bracket (2), an L-shaped bracket (13) is fixedly installed on the top of the rear wall of the movable seat (6), a CCD camera (14) is fixedly installed on the other end of the L-shaped bracket (13) and located on the rear side of the drag chain (3), a positioning platform (8) is installed on the top of the processing seat (1) and located below the bracket (2), and the workpiece (9) is placed above the positioning platform (8).

2. The automatic CCD calibration mechanism according to claim 1, characterized in that: A stepper motor (11) is fixedly mounted on the side wall of the guide rail (4), a screw rod (12) is rotatably mounted in the guide rail (4), the screw rod (12) passes through the slider (5), and the screw rod (12) is threadedly connected to the slider (5), and the output shaft of the stepper motor (11) is transmission-connected to the screw rod (12).

3. The automatic CCD calibration mechanism according to claim 1, characterized in that: A connecting frame (10) is fixedly mounted on the top of the movable seat (6), and the top of the connecting frame (10) is fixedly connected to the drag chain (3).

4. The automatic CCD calibration mechanism according to claim 1, characterized in that: A lifting seat (7) is slidably mounted on the front side of the movable seat (6), an electric push rod (15) is provided inside the movable seat (6), and the bottom end of the electric push rod (15) is fixedly connected to the lifting seat (7).

5. The automatic CCD calibration mechanism according to claim 1, characterized in that: The CCD camera (14) is installed longitudinally, and the lens of the CCD camera (14) is directed downward toward the positioning platform (8) and the workpiece (9).

6. The automatic CCD calibration mechanism according to claim 4, characterized in that: The front wall of the lifting seat (7) is provided with a mounting hole, and the front end of the lifting seat (7) can be fixedly mounted with a transport mechanism through the mounting hole.

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