An intelligent multi-code collaborative recognition platform

Abstract

The present invention discloses an intelligent multi-code collaborative recognition platform, including a rotating platform, multiple workpiece fixing components, an adjustment mechanism, a code scanning module and a control system. The rotating platform rotates intermittently, and the workpiece fixing components are arranged along the circumference to fix the object to be identified; the adjustment mechanism is arranged under the platform, and after the platform stops, it raises the contact recognition position fixture and completes the position correction, and then retracts to avoid. The code scanning module includes a two-dimensional code recognition module and a dot matrix code recognition module arranged above and below the platform, which are respectively adapted to different code system image acquisition. The control system coordinates the platform rotation, adjustment action and image acquisition sequence, and processes the recognition data to achieve upload and traceability. The platform is suitable for parallel recognition of multiple barcodes, improving the recognition accuracy and stability of highly reflective and irregular code surfaces.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial visual recognition equipment, and in particular to an intelligent multi-code collaborative recognition platform. Background Art

[0002] In modern electronics manufacturing, particularly in the assembly of mobile phones and their components, with ever-increasing production pace and the growing demand for refined quality management, component traceability has become a critical component of smart factory development. To ensure traceability for part source control, assembly process documentation, and after-sales maintenance, manufacturers typically apply multiple barcodes to various components, including QR codes (such as QR Codes and DataMatrix) and dot matrix codes (a type of CNC two-dimensional dot matrix identifier). These codes are often located at different positions and angles on parts, and even multiple codes may coexist, resulting in a complex recognition environment. Consequently, production sites place higher demands on barcode scanning equipment, requiring not only fast recognition, multi-code compatibility, and high recognition rates, but also adaptability to compact, space-constrained, and highly variable industrial environments.

[0003] Common code scanning methods currently used in the industry include manual recognition using handheld scanners, stationary scanners positioned beneath conveyor lines, multi-angle industrial camera arrays, and flexible recognition using robotic arms in conjunction with vision systems. These solutions are embodied in patents such as CN109015358A, CN113255080A, and CN112386285A. While these solutions offer some adaptability in specific scenarios, they suffer from common issues: complex system architecture, bulky equipment, high deployment costs, and insufficient recognition efficiency to meet the demands of high-speed production lines. Most solutions only support a single barcode type and struggle to accommodate the mixed recognition needs of QR and dot matrix codes. Furthermore, existing light source designs struggle to suppress halo and reflection interference when dealing with complex surfaces such as curved, reflective, and metallic components, leading to increased recognition failure rates. Furthermore, the fixture structure lacks adaptability and dynamic adjustment capabilities, impacting scanning accuracy and system reliability.

[0004] Therefore, there is an urgent need for a multi-code automatic recognition platform that can realize batch clamping of multiple parts, compatible recognition of QR codes and dot matrix codes, dynamic adjustment of fixtures and optimized control of recognition light sources in an industrial environment with limited space, so as to effectively improve recognition efficiency and system adaptability. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to propose an intelligent multi-code collaborative recognition platform, which includes:

[0006] A rotating platform for carrying a plurality of objects to be identified, wherein the rotating platform rotates intermittently along a preset axis;

[0007] A plurality of workpiece fixing assemblies, arranged on the rotating platform, for respectively fixing the objects to be identified;

[0008] an adjustment mechanism disposed below the rotating platform, which contacts the workpiece fixing assembly at the identified position after the rotating platform stops and performs a position correction action, and completes a retraction operation before the rotating platform receives the next rotation control command to prevent structural interference with other workpiece fixing assemblies in the rotation path;

[0009] At least one code scanning module, disposed above and / or below the rotating platform, for collecting a QR code and / or dot matrix code image on the object to be identified;

[0010] A control system is used to control the intermittent rotation of the rotating platform, control the lifting and lowering action of the adjustment mechanism and the image acquisition timing of the code scanning module, and coordinate the operating sequence of the above components.

[0011] In some embodiments, the workpiece fixing components are arranged on the rotating platform in a circular array or a near-circular array to achieve uniform arrangement of multiple stations and recognition operations in a consistent rhythm.

[0012] In some embodiments, the adjustment mechanism is a structurally independent lifting and adjusting unit, including an actuator that can be extended and retracted in the vertical direction, which rises at the identification position and contacts the workpiece fixing component to perform position correction, and automatically retracts to an avoidance position before rotation.

[0013] In some embodiments, the lifting and adjusting unit includes an electric cylinder, an air cylinder or a guide rail module, wherein the electric cylinder or the air cylinder is used to quickly respond to lifting actions and is suitable for high-beat production line rhythm; a guide column or an adjustment contact part is provided at the end thereof for position correction of the workpiece fixing assembly before identification, and retracting to an avoidance area before rotation.

[0014] In some embodiments, the code scanning module includes a QR code recognition module and a dot matrix code recognition module; the QR code recognition module is arranged above the rotating platform and arranged downward, and is used to perform close-range wide-angle recognition on highly reflective materials; the dot matrix code recognition module is arranged below the rotating platform and arranged upward, equipped with a telephoto lens and high-contrast lighting. The above two modules do not interfere with each other in structure, and functionally adapt to the differences in angle and light source requirements of different code systems, forming a collaborative recognition structure.

[0015] In some embodiments, the QR code recognition module includes a camera, a ring light source and a dome light source. The ring light source is arranged below the lens of the camera and around its optical axis. The dome light source cover is arranged below the ring light source to form a combined lighting system for providing a composite light field of edge enhancement and soft light diffuse reflection to reduce the interference of highly reflective materials on QR code image acquisition and improve recognition contrast and stability.

[0016] In some embodiments, the dot matrix code recognition module includes a long-focal-length image acquisition lens and an annular light source. The annular light source is arranged around the optical axis of the lens and coaxially with the lens to provide an annular lighting area with weak directionality and uniform illumination, so as to enhance the imaging contrast of the code surface boundary area, reduce halo and reflection interference, and improve the recognition stability and accuracy of the dot matrix code.

[0017] In some embodiments, the control system is used to control the adjustment mechanism to rise after the rotating platform stops, so that the adjustment mechanism contacts the workpiece fixing component currently in the identified position and performs position correction;

[0018] After the image acquisition is completed and before the rotation start instruction is received, the adjustment mechanism is controlled to retract to a preset avoidance position.

[0019] This ensures that the adjustment mechanism does not structurally interfere with other workpiece fixing components in the rotation path during the rotation process.

[0020] In some embodiments, the control system further includes an image processing and data management module, which is used to perform decoding, valid data screening, duplicate information elimination and result fusion processing on the image data collected by the barcode scanning module, and upload the identified barcode information to an external traceability database or product management system to achieve centralized management of multi-code recognition data and association with traceability information.

[0021] In some embodiments, a positioning sensor and a material detection sensor are also included, wherein the positioning sensor is used to detect whether the rotating platform has completed positioning, and the material detection sensor is used to detect whether the object to be identified is located at the workpiece fixing assembly. The control system coordinates and controls the lifting and lowering action of the adjustment mechanism and the image acquisition timing of the code scanning module according to the feedback signals of the positioning sensor and the material detection sensor, so as to realize the synchronous linkage of the platform rotation, fixture adjustment and image acquisition action, thereby improving the timing accuracy and operation stability of the recognition process.

[0022] Additional aspects and advantages of the present invention will be described in part in the following description and will become apparent from the following description or through practice of the present invention.

[0023] The present invention arranges multiple workpiece fixing components on the circumference of a rotating platform and controls the platform to rotate intermittently, so that multiple workpieces to be identified can enter the identification position in turn, thereby realizing batch identification of multiple workpieces in a limited space, improving the scanning cycle efficiency, and is suitable for workstation-intensive assembly scenarios.

[0024] The adjustment mechanism set under the platform rises after the platform stops, contacts the current identification position fixture for position correction, and automatically retracts before the platform rotates, which can effectively avoid interference with other fixtures, while improving the positioning accuracy of the barcode in the acquisition window and reducing image deviation.

[0025] The barcode scanning module is set at different positions above and below the platform, which can collect barcode images in different orientations, enhance the system's adaptability to different code position layouts, and improve the coverage of the collection range.

[0026] The control system logically and uniformly manages the execution sequence of the rotation, adjustment, and acquisition modules, enabling the system to maintain coordinated movements even at high-beat operation, reducing the risk of abnormal triggering or identification interruption, and enhancing system process stability.

[0027] In summary, the platform of the present invention, based on a compact structure, realizes the organic combination of multi-station, high adaptability, dynamic adjustment capability and process controllability, and is suitable for a variety of industrial code scanning and recognition scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a structural diagram of an intelligent multi-code collaborative recognition platform provided by the present invention;

[0030] Figure 2 A schematic diagram of the top view of the intelligent multi-code collaborative recognition platform provided by the present invention;

[0031] Figure 3 This is an enlarged view of area A in 1;

[0032] Figure 4 A schematic diagram of the internal structure of an intelligent multi-code collaborative recognition platform provided by the present invention;

[0033] Figure 5 for Figure 4 Enlarged view of area B in the middle;

[0034] Figure 6 This is a control system and module connection diagram of the present invention.

[0035] Description of reference numerals:

[0036] 1. Rotating platform; 2. Workpiece fixing assembly; 3. Adjustment mechanism; 4. Actuator; 5. Guide column or adjustment contact part; 6. Code scanning module; 7. QR code recognition module; 8. Dot matrix code recognition module; 9. Code reader; 10. Ring light source; 11. Dome light source; 12. Image acquisition lens; 13. Material sensor; 14. Positioning sensor; 15. Control system. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] 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, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] The following describes embodiments of the present invention in detail. 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 having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0041] Figure 1 This is a structural diagram of an intelligent multi-code collaborative recognition platform provided by the present invention; Figure 2 A schematic diagram of the top view of the intelligent multi-code collaborative recognition platform provided by the present invention; Figure 3 This is an enlarged view of area A in 1; Figure 4 A schematic diagram of the internal structure of an intelligent multi-code collaborative recognition platform provided by the present invention; Figure 5 for Figure 4 Enlarged view of area B in the middle; Figure 6 This is a control system and module connection diagram of the present invention.

[0042] Reference below Figure 1-Figure 5 Description: In one possible embodiment, an intelligent multi-code collaborative identification platform includes: a rotating platform 1 for carrying multiple objects to be identified, and the rotating platform 1 rotates intermittently along a preset axis; multiple workpiece fixing components 2 are arranged on the rotating platform 1, and are used to fix the objects to be identified respectively; an adjustment mechanism 3 is arranged below the rotating platform 1, and contacts the workpiece fixing component 2 located at the identification position after the rotating platform 1 stops and performs a position correction action, and completes the retraction operation before the rotating platform 1 receives the next rotation control instruction to prevent structural interference with other workpiece fixing components 2 in the rotation path; at least one code scanning module 6 is arranged above and / or below the rotating platform 1, and is used to collect QR code and / or dot matrix code images on the objects to be identified; a control system 15 is used to control the intermittent rotation of the rotating platform 1, control the lifting and lowering action of the adjustment mechanism 3 and the image acquisition timing of the code scanning module 6, and coordinate the operating sequence of the above components.

[0043] The rotating platform 1 is preferably made of aluminum alloy with a platform diameter of 600mm. It is driven by a servo motor and combined with a precision indexer to achieve intermittent rotation at equal intervals (for example, 30°), forming a multi-station structure. Each workpiece fixing component 2 is fixed to the platform surface by bolts and is equipped with a customized slot fixture to adapt to the clamping requirements of products of different shapes. It is arranged in a circular manner to ensure that the rhythm of each station is balanced. The adjustment mechanism 3 is arranged directly below the rotating platform 1 and is connected to the equipment base through a guide rail module. Its driving unit is an electric cylinder with a stroke of 20mm and a repeatability accuracy of ±0.1mm. A ball head guide column 5 is provided at the end of the electric cylinder. After the rotating platform 1 completes the rotation positioning, the electric cylinder drives the guide column 5 to rise and contact the limit groove on the workpiece fixing component 2 at the identification position, thereby achieving precise posture fine-tuning. To ensure the safety of subsequent rotation, the adjustment mechanism 3 automatically retracts to the avoidance position after each image acquisition is completed and before receiving the platform rotation command. The avoidance height is set to 30 mm from the bottom of the platform, and its retracted state is confirmed by the limit switch.

[0044] The barcode scanning module 6 consists of two independent modules, one above and one below the platform. The upper module is the QR code recognition module 7, mounted 200 mm above the platform via a height-adjustable bracket. It features a wide-angle industrial camera, a ring light source 10, and a dome light source 11 for close-up photography of QR codes on highly reflective surfaces. The lower module is the dot code recognition module 8, equipped with a telephoto lens and a cold light ring illumination unit. This module faces upward and is used to capture dot code images within recessed or deep cavities. Both modules are connected via a Z-guide rail, allowing for flexible adjustment of the shooting height and angle to meet diverse product recognition requirements.

[0045] The control system 15 employs a modular architecture, comprising a PLC control unit, an image processing module, a sensor interface module, and a host computer communication module. The PLC control unit outputs control signals to the rotary motor, code scanning module 6, and electric cylinder actuator 4, and receives feedback signals from the positioning sensor 14 and limit switches, enabling logical control of platform positioning, adjustment, and recognition. The image processing module receives and analyzes images captured by the code scanning module 6, performing code recognition and valid data screening. The recognition results are uploaded to an external database or product management system via the communication module, enabling data traceability and management.

[0046] The platform achieves multi-station simultaneous processing through a precise rotation mechanism. An adjustment mechanism 3 ensures consistent fixture position for each recognition, effectively improving image acquisition accuracy and recognition success rate. Upper and lower barcode scanning modules 6 enable collaborative acquisition of different code formats, adapting to the recognition needs of products made of various materials and complex shapes. A control system 15 coordinates control of each module, offering flexible parameter settings and remote communication capabilities. Experimental verification demonstrates that at a production line speed of 20 stations / minute, the platform achieves a barcode recognition success rate exceeding 98%, with an image distortion rate of less than 2%, demonstrating stable industrial recognition capabilities and excellent scalability.

[0047] The rotating platform 1 can also adopt a circular guide rail conveying structure to accommodate the layout requirements of large products; the workpiece fixing component 2 can be modified to a vacuum adsorption, flexible clamping claw, or magnetic adsorption structure to improve product adaptability; the adjustment mechanism 3 can optionally use a cylinder or servo module, and the guide end structure can be adjusted according to the contact surface shape of the identification object; the code scanning module 6 can be expanded to a multi-angle acquisition array structure, introducing autofocus and regional edge enhancement algorithm modules to optimize image processing effects; the control system 15 can integrate an industrial vision platform or AI recognition module to support data interaction with MES and ERP systems, realizing the automated operation of product identification, quality traceability, and production line linkage control. The entire platform can also be deployed in batches or transported in an integrated manner through modular packaging to meet the identification needs of different production lines.

[0048] See also Figure 2-4 In one possible embodiment, the workpiece fixing components 2 are arranged on the rotating platform 1 in a circular array or a near-circular array, thereby achieving uniform arrangement of multiple stations and recognition operations in a consistent rhythm.

[0049] Specifically, the rotating platform 1 is a disc structure made of aluminum alloy, and its diameter is preferably 600 mm. A main shaft is provided in the center of the platform, and the main shaft is connected to a servo motor and a divider to realize intermittent rotation of the platform along the central axis. In this embodiment, 6 workpiece fixing assemblies 2 are provided on the platform, and each workpiece fixing assembly 2 is arranged at equal angles along the circumferential direction, and the central angle between any two adjacent workpiece fixing assemblies 2 is 60°. Six mounting holes are provided on the circumferential edge of the platform, and the mounting holes are evenly distributed along a circle with a radius of 250 mm and the center of the platform as the center. Each mounting hole is provided with a locating pin structure in conjunction with the fixture base, and the bottom surface of the fixture and the platform are provided with positioning hole grooves to realize rapid positioning and anti-rotation installation, ensuring installation accuracy and layout symmetry.

[0050] The workpiece securing assembly 2 can utilize a slot-type fixture, pneumatic gripper module, or magnetic fixture to achieve universal gripping of objects of varying shapes and sizes. Once installed, each fixture maintains its top surface at the same height as the reference plane of the rotating platform 1, ensuring that the object remains within the predetermined focal plane of the barcode scanning module 6, ensuring image clarity and consistent focus.

[0051] The above arrangement ensures that after each rotation of the rotating platform 1, exactly one workpiece fixing assembly 2 is in the identification position, and the remaining five stations are in a transitional state. The control system 15 can set a cyclic beat of rotation → stop → acquisition → start, with a typical acquisition waiting time of 0.3 seconds, which is used to buffer the residual vibration of the platform rotation before triggering the code scanning action, thereby improving image stability and recognition accuracy. Through this consistent arrangement and control logic, a continuous, efficient, and cyclic code scanning and recognition process can be achieved for 6 stations, adapting to the recognition requirements of medium-speed production lines of 10 to 20 times per minute.

[0052] This structure creates a symmetrical platform structure, helping to maintain mass balance during rotation, reducing vibration and mechanical wear caused by off-center loading, and improving platform operational stability and equipment life. The standardized, evenly spaced arrangement also facilitates the use of uniform parameters in the control system 15 during timing control, improving programming simplicity and troubleshooting efficiency.

[0053] It is worth noting that the number of workpiece fixing components 2 in the circular array can be flexibly adjusted according to the recognition efficiency and beat requirements, for example, it can be set to 4, 8 or 12 workstations, and the control system 15 can set the rotation index value according to the corresponding angle to ensure the alignment accuracy of the workstation. In addition, in order to adapt to non-circular or special-shaped platform structures, an "approximate circular array" layout can also be adopted, such as arranging the workpiece fixing components 2 on the edge of an elliptical platform or a polygonal platform. This type of approximate array arrangement allows the installation position of each fixture to have an angular deviation of no more than ±3° from the ideal circular position. By compensating and correcting the code scanning position through the control system 15, it is also possible to achieve beat consistency and recognition stability similar to that of a standard circular array, thereby improving the flexible adaptability of the system.

[0054] See also Figure 4-5 In one possible embodiment, the adjustment mechanism 3 is a structurally independent lifting and adjusting unit, which includes an actuator 4 that can be extended and retracted in the vertical direction. After the rotating platform 1 stops, it rises and contacts the workpiece fixing component 2 located at the identification position to perform a position correction action; before the platform performs the next rotation action, the actuator 4 retracts to a avoidance position outside the rotation path to prevent structural interference with other workpiece fixing components 2 in the rotation path.

[0055] The lifting and adjustment unit is mounted on the equipment base below the rotating platform 1. Its structure is arranged independently from the rotating platform 1 to avoid synchronous interference during rotation. In this embodiment, the lifting and adjustment unit uses an electric cylinder as the main actuator. The electric cylinder is arranged in a vertical direction, and its cylinder body is fixed to the base structure via a mounting bracket. The piston rod extends vertically upward, and the end is connected to a guide contact component. This contact part is preferably a ball-head guide column 5, or it can be a rubber pad or elastic contact block. Its shape should match the lower surface alignment contact structure of the workpiece fixing component 2 to ensure contact stability and correction accuracy.

[0056] To ensure the adaptability and repeatability of the lifting stroke, the electric cylinder has an effective telescopic stroke of 20mm to 40mm, and the piston rod's repeatability is controlled within ±0.1mm, ensuring repeatability of the contact position during each lift. During actual operation, after the rotating platform 1 completes an angular indexing and stops, the control system 15 activates the electric cylinder's lifting action by outputting a lifting control signal. The guide post 5 then rises and contacts the set area at the bottom of the workpiece fixture assembly 2 at the currently identified position. This contact action typically involves a slight upward push, creating a directional corrective force to compensate for positional inconsistencies caused by fixture installation deviations, rotational runout, or loose clamping.

[0057] After contact positioning is complete, the control system 15 sequentially activates the code scanning module 6 to perform image acquisition operations. Once image acquisition is complete and the control system 15 receives the "code scanning completed" feedback signal, the electric cylinder immediately retracts, retreating the guide post 5 to a preset clearance height outside the rotation path. This clearance height is preferably set at a distance of no less than 30 mm from the bottom of the rotating platform 1, and the position of the guide post 5 is monitored in real time by a limit switch or position sensor. Only after confirming that the adjustment mechanism 3 has fully retracted and returned to a safe position does the control system 15 issue the next rotation start signal to the rotation drive mechanism, ensuring that no structural interference occurs during the rotation process.

[0058] Through the above method, the adjustment mechanism 3 remains independent from the rotating platform 1 in structure, relies on the platform state feedback sequence to intervene in control, and only performs single-point contact correction when the platform is stationary, which effectively improves the system's operating safety, positioning consistency and code scanning recognition accuracy.

[0059] It's worth noting that the actuator 4 of the lift adjustment unit can be replaced with a pneumatic cylinder, servo actuator, or linear module. The selected component should have appropriate response speed and control accuracy, and be compatible with the system controller's communication or signal interface. The contact end can also be flexibly configured as a hemispherical head, guide post, or elastic contact body, depending on the fixture's base structure, to adapt to different tooling structures for identification objects, thereby increasing the applicability and adaptability of the adjustment mechanism 3.

[0060] See also Figure 4-5 In one possible embodiment, the lifting and adjusting unit is a modular positioning and correction mechanism, comprising a drive actuator 4 and an adjusting contact member. The actuator 4 is an electric cylinder, a pneumatic cylinder, or an integrated guide rail module, and the adjusting contact member is a guide post 5 or a functionally equivalent structure. Prior to recognition, the actuator performs a lifting and contacting action to achieve micro-positioning correction of the workpiece fixture assembly 2 at the recognition station. The actuator then retracts to a safe position just before the rotating platform 1 is activated to avoid interference.

[0061] Specifically, the actuator 4 is arranged in the vertical direction, and its cylinder body is fixed to the mounting seat of the equipment frame below the platform. The cylinder body and the mounting seat are connected by bolts and have a limit reference surface. The piston rod extends vertically upward, and an adjustment contact member is installed at the end, preferably a metal guide column 5 with a diameter of 8mm to 20mm, the top of which is processed into a hemispherical head or a flat contact surface. The contact end of the guide column 5 forms a contact fit with the positioning area on the lower surface of the workpiece fixing component 2, which is used to provide axial micro-thrust when there is a position offset in the fixture. The maximum extension stroke of the cylinder body is preferably 20mm to 40mm, and the repeatability accuracy is better than ±0.1mm.

[0062] In this embodiment, if an electric cylinder is used, its motor control signal is output by the PLC system and connected to the actuator 4 control terminal through the I / O module. The typical response time is no more than 200ms, which is suitable for the rhythm control of medium-speed to high-speed production lines. If a pneumatic cylinder is used, the reversing control is performed by a three-position five-way solenoid valve. It is suitable for simple and cost-sensitive applications. The response time can be less than 100ms, but it must be combined with a limit sensor for position confirmation. If a guide rail module structure is selected, it is often combined with a screw servo system. It is suitable for use in scenarios with high recognition accuracy requirements, large fixture size, or multi-dimensional errors in the workpiece.

[0063] Control system 15 manages the process based on sequential logic: platform rotation stops → lift adjustment unit raises → positioning contact → image acquisition → lift adjustment unit retracts → platform enters the next rotation cycle. To prevent structural interference, after the lift mechanism retracts, its guide column 5 sinks a minimum of 30mm. Position signals are provided by independently installed proximity switches, photoelectric sensors, or encoders. Control system 15 only triggers rotation after reading the retraction status confirmation signal, thus establishing a complete safety interlock control logic.

[0064] To improve compatibility with different fixture structures, the mounting base for the adjustable contact element is designed to be replaceable. This allows for the selection of corresponding contact heads, including hemispherical heads, elastic rubber pads, and embedded stoppers, depending on whether the fixture's bottom surface is flat, inclined, or concave. These contact elements can be quickly replaced by the operator through threaded unscrewing without disassembling the main mechanism.

[0065] In other optional structures, the lifting mechanism can also be equipped with a servo electric cylinder with absolute position feedback, which can achieve closed-loop displacement control through a built-in encoder and link with the host computer vision module for online compensation, further improving the adjustment accuracy and position stability. It is suitable for industrial recognition platforms with extremely high requirements for image consistency and recognition accuracy.

[0066] See also Figure 1 、 Figure 3 In one possible embodiment, the code scanning module 6 includes a two-dimensional code recognition module 7 and a dot matrix code recognition module 8, respectively. The two-dimensional code recognition module 7 is located above the rotating platform 1 and mounted on the upper crossbeam of the frame via a bracket, with its lens optical axis facing downward. The dot matrix code recognition module 8 is located below the rotating platform 1 and mounted on the device base structure via a rigid support, with its lens optical axis facing upward. The two modules are vertically arranged vertically, with independent mounting structures and non-overlapping optical paths to avoid field of view interference.

[0067] The QR code recognition module 7 includes an industrial-grade code reader 9 (with a resolution of at least 1.3 million pixels), a wide-angle liquid auto-zoom lens assembly (focal lengths of 16mm and 25mm), and a ring-shaped illumination device, externally equipped with a hemispherical dome light source 11. The illumination device is arranged symmetrically along the lens' optical axis, creating a composite illumination field suitable for close-range, highly reflective material recognition. The bracket's height is adjustable from 200mm to 500mm, and the illumination angle is finely adjusted using a slide mechanism to cover various QR code locations on the fixture's upper surface.

[0068] The dot code recognition module 8 is a self-contained, bottom-mounted imaging system. Its lens system utilizes a telephoto lens with a focal length of 35mm to 50mm. A coaxial annular cold light source is located in front of the lens, covered by a light shield and diffuse reflector. The lens' optical axis is oriented vertically upward and positioned directly below the opening of the rotating platform 1. The recognition module's bracket is rigidly locked, allowing for ±5mm translation adjustment and ±10° angular adjustment, enabling precise alignment of complex dot code areas such as deep grooves, concave surfaces, and curved surfaces.

[0069] In the control process, the activation of the barcode scanning module 6 is centrally orchestrated by the control system 15. Once the rotating platform 1 stops and its positioning is confirmed by the positioning sensor 14, the system first triggers the adjustment mechanism 3 to complete the fixture alignment. Then, the trigger sequence is set according to the recognition type, and acquisition instructions are issued to the QR code recognition module 7 and the dot matrix code recognition module 8, respectively. After the dot matrix code recognition module 8 completes the acquisition, its image data undergoes preprocessing steps such as grayscale equalization, edge filtering, and code point enhancement in a dedicated image processing unit. Barcode recognition and code system identification are then performed. The recognition results are stored in a local cache and can be uploaded to the traceability system.

[0070] This embodiment establishes a dot-matrix code acquisition path tailored to the needs of industrial metal component microcode recognition by independently positioning the dot-matrix code recognition module 8 beneath the platform. This architecture combines specialized lighting, a long-range optical design, and a stable imaging mount. This structure is particularly suitable for complex scenarios, such as those involving invisible areas, uneven code surfaces, and limited lighting conditions. The synergy of precise positioning, stable lighting, and long-range focusing enhances image consistency and the fault tolerance of the recognition algorithm.

[0071] In the environmental comparison test, under a fixed tooling platform, a unified dot matrix code sample (CNC probe / laser engraved on the aluminum surface, code surface diameter 4mm, depth approximately 8μm) was used to test the recognition module under 25 sets of different surface reflectivity and angle interference conditions. The results showed that the average recognition success rate of this structure was 96%, an increase of approximately 21.5% compared to the single upper recognition module structure, and the recognition consistency was significantly better than the solution without an independent lower module.

[0072] See also Figure 1 、 Figure 3 In one possible embodiment, the QR code recognition module 7 includes a camera, a ring light source 10, and a dome light source 11. The ring light source 10 is arranged below the lens of the camera and around its optical axis. The dome light source 11 cover is arranged below the ring light source 10, forming a combined lighting system for providing a composite light field of edge enhancement and soft light diffuse reflection to reduce the interference of highly reflective materials on QR code image acquisition and improve recognition contrast and stability.

[0073] The QR code recognition module 7 includes an industrial camera, a ring light source 10, and a dome light source 11. The industrial camera uses an image sensor with a resolution of at least 1280×1024 pixels. The lens preferably features an auto-focus mechanism with a focal length range of 16mm to 25mm to achieve full field of view coverage of the QR code image to be identified. The camera is fixed to the upper frame structure of the device and can be fine-tuned using a Z-axis height adjustment bracket. The working distance is adjustable from 150mm to 250mm to accommodate different product specifications.

[0074] Specifically, the ring light source 10 is positioned below the camera lens, coaxially arranged along the optical axis. It utilizes a multi-point symmetrically distributed high-brightness LED array and is mounted on a circular mounting surface at the bottom of the camera. The light emitted by the ring light source 10 forms a symmetrical conical illumination area centered on the optical axis, primarily providing localized directional illumination, enhancing the brightness gradient and contrast around the edges of the QR code and improving image detail.

[0075] Among them, the dome light source 11 is an independent light-emitting unit, which is made of a spherical crown-shaped cover made of milky white translucent material. Diffused LED light sources are evenly distributed inside it to emit light directly. The dome cover diffuses and diffusely reflects the light emitted by the internal light source multiple times, so that the light is evenly irradiated from the bottom of the dome toward the surface of the QR code. An open through hole with a diameter of about 70mm to 100mm is opened at the bottom of the dome, and the opening is facing the surface of the object to be identified. The dome light source 11 actively emits light and combines the secondary diffuse reflection effect of the dome structure to form an isotropic, non-directional shadowless light illumination field, thereby effectively eliminating shadows, light spots and local overexposure caused by high surface reflection, curved surface structure or fine texture, and significantly improving the uniformity and clarity of QR code image acquisition.

[0076] During the code scanning process, once the rotating platform 1 has completed its positioning and the position detection sensor has confirmed its position, the control system 15 first triggers the dome light source 11 and ring light source 10 in the QR code recognition module 7 to emit light at a preset brightness output, then triggers the camera to initiate image acquisition. Light source control parameters (such as brightness, current, voltage, and pulse width) are centrally managed by the central control system 15 and synchronized with camera acquisition instructions via I / O or serial communication to ensure stable and consistent lighting conditions during the scanning process. The captured QR code image undergoes edge detection, image correction, QR code parsing, and code system determination in the visual processing module, ultimately achieving high-precision multi-code recognition.

[0077] It is worth noting that the dome light source 11 can be further integrated with a variable brightness adjustment module to adapt to scenes with different surface reflectivities or different lighting requirements; the ring light source 10 can also be configured with a polarizing filter or a zoom optical system to optimize the lighting effects on surfaces of different materials; the camera lens can also be replaced with an autofocus structure, and the height adjustment module of the rotating platform 1 can be linked to dynamically adjust the shooting focal length to further enhance the platform's versatility and diverse adaptability.

[0078] See also Figure 1 、 Figure 3 In one possible embodiment, the dot code recognition module 8 includes a long-focal-length image acquisition lens 12 and a ring-shaped light source 10. The ring-shaped light source 10 is disposed around the front end of the lens and coaxially arranged below the optical axis thereof. The ring-shaped light source 10 is used to provide a lighting environment with weak directionality and uniform illumination distribution within the image acquisition area, thereby enhancing the imaging contrast of the code surface edge, suppressing reflection interference, and improving recognition stability and accuracy.

[0079] Specifically, the dot code recognition module 8 is mounted below the rotating platform 1. Its structure includes an image acquisition assembly, an illumination assembly, and a mounting and adjustment mechanism 3. The image acquisition assembly includes a long-focal-length lens, preferably between 35mm and 50mm. This lens is connected to an industrial camera with a resolution of at least 1600×1200 pixels via a threaded interface. The lens and camera are integrally secured to a Z-axis slide bracket, which is located within the equipment chassis. This bracket allows for vertical adjustment of the lens by ±10mm. The lens's field of view is oriented upward, directly toward the code plane of the fixture below the rotating platform 1.

[0080] The lighting assembly is a ring-shaped cold-light LED light source. The ring-shaped light source 10 is arranged along the optical axis of the lens, with a 120° beam angle. The evenly spaced LED units form a concentric illumination spot, and the light intensity varies by no more than ±15% within a ±30mm area around the center of the code plane. This ring-shaped light source 10 is fixed to the front of the lens housing via a snap-fit ​​mechanism. It is enclosed by a light shield to block stray light. A transparent optical glass sheet is placed within the imaging window as a dustproof protective layer to prevent oil or particles from interfering with image quality.

[0081] During the barcode scanning process, when the rotating platform 1 reaches the recognition station and is detected by the bottom position sensor, the control system 15 outputs a light source activation command, illuminating the ring light source 10 and establishing a stable illumination field. The system then sends an acquisition trigger signal to the camera, and the image acquisition component acquires an image of the barcode surface under stable illumination. The image data is then transmitted to the image processing module, which performs contrast enhancement, edge filtering, dot matrix feature extraction, and code value analysis to complete the recognition process.

[0082] Positioning sensor 14 is a non-contact inductive sensor installed below the platform. It senses the metal positioning block at the bottom of rotating platform 1. When the platform completes its indexing motion, the sensor outputs a high-level signal to the PLC input, confirming positioning completion and authorizing the start of image acquisition and lighting control, forming a closed-loop logic.

[0083] To accommodate the recognition needs of various dot matrix codes, the image acquisition component can be equipped with an optional lens with automatic aperture control, enabling imaging adaptability under varying illumination levels. The lighting module can also be upgraded to a multi-segment, independently controllable LED array, optimizing reflective properties of complex surfaces through zone-by-zone dimming. The entire module structure also supports integration with a motorized lift mechanism, automatically adjusting the imaging height when changing products, enhancing flexible recognition capabilities.

[0084] See also Figure 6In one possible embodiment, the control system 15 is used to control the adjustment mechanism 3 to rise after the rotating platform 1 stops, so that it contacts the workpiece fixing component 2 currently in the identification position and performs position correction; before the image acquisition is completed and the rotation start instruction is received, the adjustment mechanism 3 is controlled to retract to a preset avoidance position to ensure that the adjustment mechanism 3 does not structurally interfere with other workpiece fixing components 2 in the rotation path during the rotation process.

[0085] When the object to be identified is placed manually or automatically on the workpiece fixing assembly 2 on the rotating platform 1, the material detection sensor 13 senses the product placement status in real time, and after confirming that the product to be detected is correctly in place, sends a confirmation signal to the control system 15. After receiving the product placement signal, the control system 15 further detects whether the rotating platform 1 has stopped and stably positioned to prevent the motion platform from affecting subsequent identification operations. If all conditions are met, the control system 15 will issue an instruction to drive the adjustment mechanism 3 set below the rotating platform 1 to rise in the vertical direction and contact the workpiece fixing assembly 2 at the identification position. By applying appropriate positioning pressure, posture correction is performed to ensure that the two-dimensional code or dot matrix code of the object to be identified is spatially aligned with the acquisition area of ​​the code scanning module 6, thereby improving the success rate of image acquisition and the accuracy of data recognition.

[0086] After the position correction is completed, the control system 15 immediately triggers the code reader 9 or CCD camera of the code scanning module 6 to start, and efficiently collects the two-dimensional code or dot matrix code image on the surface of the product to be inspected according to the preset acquisition parameters. During the code scanning process, the control system 15 continuously monitors the image acquisition status to ensure that the data is complete and meets the standards. After the code scanning module 6 completes the image acquisition and feeds back the completion signal to the control system 15, the control system 15 controls the adjustment mechanism 3 to retract to the preset avoidance position and continuously detects its retraction action. Only after the adjustment mechanism 3 is confirmed to be fully retracted and reaches the safe area, the control system 15 allows the rotating platform 1 to perform subsequent rotation actions. Through the above-mentioned closed-loop control, the safety gap between the various mechanisms of the rotating platform 1 during continuous operation is ensured, effectively avoiding operational abnormalities caused by mechanical interference, and improving the overall equipment stability and safety.

[0087] After the adjustment mechanism 3 is retracted and confirmed to be safe, the control system 15 further calls the image processing and data management module to perform in-depth analysis and processing on the collected image data, including decoding of the QR code or dot code image, effective data screening, elimination of duplicate information and fusion of recognition results. Finally, the processed recognition data is uploaded to the external traceability database or product management system through the communication interface, realizing the centralized management of the recognition data and the effective association of the traceability information. Through the above-mentioned process control, each action is coordinated by the control system 15, and each detection and execution unit cooperates efficiently. The overall action sequence is clear and the signal flow is natural, ensuring that the intelligent multi-code collaborative recognition platform can achieve efficient, stable and safe operation in a high-beat production line environment, while greatly improving the recognition accuracy and system reliability.

[0088] In one possible embodiment, the control system 15 further includes an image processing and data management module, which is used to perform decoding, valid data screening, duplicate information elimination and result fusion processing on the image data collected by the barcode scanning module 6, and upload the identified barcode information to an external traceability database or product management system to realize centralized management of multi-code identification data and association with traceability information.

[0089] Specifically, the image processing and data management module consists of an image acquisition interface unit, an image recognition calculation unit, a data cache module, a redundancy judgment module and a communication output module, which is integrated with the control system 15 main PLC or embedded main control unit through Ethernet or serial port communication.

[0090] After the code scanning module 6 initiates recognition, it receives raw image data from the QR code recognition module 7 and the dot matrix code recognition module 8 via the image acquisition interface unit. This data is cached in a standard format (such as BMP or JPEG) in the image processing system's local cache. Subsequently, the image recognition calculation unit performs image analysis, grayscale normalization, edge feature extraction, code region location, and character decoding based on the image coordinate calibration information and preset code system rules. It then outputs the recognition result along with identification information such as the corresponding timestamp and workpiece ID.

[0091] To ensure data consistency during multi-module collaborative recognition, the data management module incorporates duplicate information detection logic. This logic operates as follows: When both the QR code and dot matrix code modules simultaneously recognize barcode information, the system compares the code values, time stamps, and workpiece location stamps. If all match, the information is merged into a single valid piece of information. If duplicate information is present (for example, if two modules recognize the same information but the time difference is less than one second), it is considered redundant and deduplication is performed. If the recognized information is inconsistent, a conflict flag is recorded for subsequent manual review.

[0092] All identification data is centrally entered into the structured data buffer module, which archives it based on a preset field structure (such as code value, code type, station number, identification time, and repeat flags) and writes it to the local database cache in chronological order. The communication output module uploads the identified data in a standard format (such as JSON, CSV, or OPCUA protocol data packets) to an external MES system, ERP system, or traceability server, enabling the association and binding of scanned information with product batches, operating sections, logistics processes, and more.

[0093] In addition, the image processing module supports data quality labeling, which can add image quality grade labels to images that fail recognition or have blurred edges for quality tracking or machine learning optimization model construction; the system can also retain the original data and recognition results of the most recent N images for random inspection, tracing or algorithm accuracy verification.

[0094] It is worth noting that the image recognition unit can use edge computing modules (such as NVIDIA Jetson, Intel Movidius, etc.) to implement local computing to reduce data transmission delay; the data upload interface can use wireless communication modules (such as 5G, Wi-Fi 6) for mobile platforms or remote recognition application scenarios; data fusion rules can also be expanded to a recognition fusion mechanism based on confidence weights to achieve more robust recognition decision results.

[0095] In one possible embodiment, it also includes a positioning sensor 14 and a material detection sensor 13, wherein the positioning sensor 14 is used to detect whether the rotating platform 1 has completed positioning, and the material detection sensor 13 is used to detect whether the object to be identified is located in the workpiece fixing component 2. The control system 15 coordinates and controls the lifting and lowering action of the adjustment mechanism 3 and the image acquisition timing of the code scanning module 6 according to the feedback signals of the positioning sensor 14 and the material detection sensor 13, so as to realize the synchronous linkage of the platform rotation, fixture adjustment and image acquisition action, and improve the timing accuracy and operation stability of the recognition process. Specifically, the positioning sensor 14 is used to detect whether the rotating platform 1 has completed reaching the preset positioning coefficient. The positioning standard is confirmed by detecting the position value of the specified motion line, and the detection accuracy reaches ±0.1mm. The material detection sensor 13 is used to detect whether the object to be identified is correctly placed and located in the workpiece fixing component 2, and ensures that the object is within the predetermined accuracy range (within ±0.5mm) through photoelectric or visual detection technology. The control system 15 coordinates the lifting and lowering of the adjustment mechanism 3 and the image acquisition timing of the code scanning module 6 based on the feedback signals of the positioning sensor 14 and the material detection sensor 13 through preset delays and signal linkage, so as to achieve high-precision synchronous linkage of platform rotation, fixture adjustment and image acquisition operations, thereby improving the timing accuracy and operation stability of the recognition process.

[0096] A positioning sensor 14, mounted at the automatic stop point of the rotating platform 1, verifies whether the platform has reached its intended position by detecting the positioning coefficient (e.g., the position of the stop line). A material detection sensor 13, mounted near the workpiece fixture 2, uses photoelectric or visual technology to detect the presence of the object to be identified. The control system 15 simultaneously analyzes these two signals. Once the platform and material are both in position, it activates the adjustment mechanism 3 to raise or lower. Once the position is achieved, it initiates image acquisition by the barcode scanning module 6. Finally, it receives the rotation command, ensuring consistency and optimal timing of each step, and avoiding failures caused by asynchronous operation or obstructions.

[0097] By implementing the positioning sensor 14 and the material detection sensor 13, it is possible to effectively detect whether the rotating platform 1 has completed positioning and whether the object to be identified is correctly placed, thereby greatly improving the timing accuracy of the platform rotation and identification operations; at the same time, by adjusting the signal linkage, it is possible to avoid errors such as materials not being in place or the platform not completing positioning and scanning the code, thereby minimizing the recognition failure rate, improving the overall system stability, reducing the failure rate, and reducing maintenance costs, while providing a basis for data statistics and intelligent analysis.

[0098] Positioning sensor 14 can be a photoelectric positioning sensor (such as a photoelectric cutoff sensor), a magnetic positioning sensor (such as a magnetic positioning sensor), or a motion line positioning sensor, depending on actual needs. Material detection sensor 13 can be a photoelectric detection sensor (such as a light interference detection sensor), an acoustic detection sensor, or a visual detection module (such as a CD-opening camera), depending on the material, size, and shape of the object to be identified. Control system 15 uses an adaptive algorithm to automatically adjust delay parameters and operating procedures, maximizing timing optimization to adapt to different production line rhythms and production requirements.

[0099] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are 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.

[0100] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An intelligent multi-code collaborative recognition platform, characterized by: include: A rotating platform for carrying a plurality of objects to be identified, wherein the rotating platform rotates intermittently along a preset axis; A plurality of workpiece fixing assemblies are provided on the rotating platform, and the workpiece fixing assemblies are arranged in a circular array on the rotating platform to realize the recognition operation with uniform arrangement of multiple stations and consistent beat; an adjustment mechanism disposed below the rotating platform, the adjustment mechanism being an independently structured lifting and lowering adjustment unit that contacts the workpiece fixing assembly at the identification position and performs a position correction action after the rotating platform stops, and retracts to a preset avoidance position outside the rotation path after image acquisition is completed, with an avoidance height of not less than 30 mm; At least one code scanning module, including a two-dimensional code recognition module disposed above the rotating platform and / or a dot matrix code recognition module disposed below the rotating platform with its optical axis facing upward; The two-dimensional code recognition module includes a ring light source and a dome light source to form a composite shadowless lighting, and the dot matrix code recognition module includes a telephoto imaging lens and a coaxial ring light source; A control system is used to control the intermittent rotation of the rotating platform, control the lifting and lowering action of the adjustment mechanism and the image acquisition timing of the code scanning module, and coordinate the operating sequence of the above components. When the upper and lower recognition modules are set at the same time, the control system performs time-sharing trigger acquisition on the two, and only after receiving the confirmation signal that the adjustment mechanism has retracted into place can it issue the next rotation start instruction to the rotation drive mechanism.

2. The intelligent multi-code collaborative recognition platform according to claim 1, characterized in that: The code scanning module includes a QR code recognition module and a dot matrix code recognition module; the QR code recognition module is arranged above the rotating platform and facing downward, and is used to perform close-range wide-angle recognition on highly reflective materials; the dot matrix code recognition module is arranged below the rotating platform and facing upward, equipped with a telephoto lens and high-contrast lighting. The above two modules do not interfere with each other in structure, and functionally adapt to the differences in angle and light source requirements of different code systems to form a collaborative recognition structure.

3. The intelligent multi-code collaborative recognition platform according to claim 2, characterized in that: The QR code recognition module includes a camera, a ring light source and a dome light source. The ring light source is arranged below the lens of the camera and around its optical axis. The dome light source cover is arranged below the ring light source, forming a combined lighting system for providing a composite light field of edge enhancement and soft light diffuse reflection to reduce the interference caused by highly reflective materials on QR code image acquisition and improve recognition contrast and stability.

4. The platform according to claim 2, characterized in that The dot matrix code recognition module includes a long-focal-length image acquisition lens and an annular light source. The annular light source is arranged around and below the optical axis of the lens and coaxially with the lens to provide an annular lighting area with weak directionality and uniform illumination, thereby improving the imaging contrast of the code surface boundary area, reducing halo and reflection interference, and improving the recognition stability and accuracy of the dot matrix code.

5. The platform according to claim 1, characterized in that The control system is used to control the adjustment mechanism to rise after the rotating platform stops, so that it contacts the workpiece fixing component currently in the identification position and performs position correction; After the image acquisition is completed and before the rotation start instruction is received, the adjustment mechanism is controlled to retract to a preset avoidance position. This ensures that the adjustment mechanism does not structurally interfere with other workpiece fixing components in the rotation path during the rotation process.

6. The intelligent multi-code collaborative recognition platform according to claim 1, characterized in that: The control system further includes an image processing and data management module, which is used to perform decoding, valid data screening, duplicate information elimination and result fusion processing on the image data collected by the barcode scanning module, and upload the recognized barcode information to an external traceability database or product management system to achieve centralized management of multi-code recognition data and association with traceability information.

7. The intelligent multi-code collaborative recognition platform according to claim 1, characterized in that: It also includes a positioning sensor and a material detection sensor, wherein the positioning sensor is used to detect whether the rotating platform has completed positioning, and the material detection sensor is used to detect whether the object to be identified is located at the workpiece fixing assembly. The control system coordinates and controls the lifting and lowering action of the adjustment mechanism and the image acquisition timing of the code scanning module according to the feedback signals of the positioning sensor and the material detection sensor, so as to realize the synchronous linkage of the platform rotation, fixture adjustment and image acquisition action, and improve the timing accuracy and operation stability of the recognition process.

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