A circuit board detection device based on planar motor
By adopting a planar motor-based design in the circuit board detection device and using closed-loop feedback to control the movable position posture, the traditional detection device's shortcomings in position adjustment accuracy and detection speed are solved, and higher detection accuracy and efficiency are achieved.
Patent Information
- Application Number
- CN202421069421.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-05-16
AI Technical Summary
Traditional circuit board detection devices have shortcomings in position adjustment accuracy and detection speed, which are difficult to meet the needs of precision detection and high throughput.
The circuit board detection device based on a planar motor is adopted. Through the cooperation of the camera and the planar motor, the position of the mover is controlled by closed-loop feedback to ensure that the circuit board plane is parallel to the camera plane and improve the clarity of the photo.
Improve detection accuracy and efficiency, simplify the equipment structure, and save the space required by the equipment.
Smart Images
Figure CN222719420U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automatic control circuit board detection, in particular to a circuit board detection device based on a planar motor. Background Art
[0002] In other electronic device fine processing scenarios such as semiconductor manufacturing processes, it is necessary to visually inspect the appearance of components on circuit boards, welding quality and other factors. In traditional inspection devices, cameras and circuit boards are connected to robotic arms and other movable devices, and robotic arms or multi-stage series-parallel devices are used to adjust the position of the camera or circuit board so that the camera plane and the circuit board plane remain relatively parallel. This method has low position adjustment accuracy, slow displacement and inspection speed, and is difficult to meet the needs of precision inspection and high throughput. Utility Model Content
[0003] The utility model aims to solve the above problems and provides a circuit board detection device based on a planar motor. The technical solution adopted is as follows:
[0004] A circuit board detection device based on a planar motor comprises a camera and a planar motor. The circuit board to be photographed is carried on a mover of the planar motor. The camera is arranged above the planar motor and is used to photograph the circuit board. The mover and the camera move relative to each other so that the plane of the circuit board is parallel to the plane of the camera and the circuit board is located within the optimal imaging range of the camera.
[0005] Based on the above solution, the camera position is fixed during shooting, and the mover moves relative to the camera.
[0006] Based on the above solution, it also includes a control unit, which adjusts the position and posture of the mover according to the clarity of the photo of the circuit board taken by the camera.
[0007] Preferably, both the camera and the mover move during the shooting process.
[0008] Based on the above scheme, the camera moves in the Z-axis direction, the mover moves along the X-axis and the Y-axis, and can rotate around the X-axis, the Y-axis and the Z-axis.
[0009] The beneficial effects of the utility model are as follows: a planar motor is used as a circuit board carrying mobile device, and the clarity of the circuit board photo taken by the camera is used as a closed-loop feedback signal to drive the mover to drive the circuit board to adjust the posture, thereby improving the clarity of the photo. The technical solution has a simple and reliable structure, can effectively improve detection accuracy and efficiency, and greatly saves the space required for the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 : Schematic diagram of the structure of the utility model;
[0011] Figure 2: The front view of the utility model structure. DETAILED DESCRIPTION
[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:
[0013] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0014] In the description of the present utility model, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0015] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0016] Example 1
[0017] In the semiconductor manufacturing process, circuit board photography inspection mainly occurs in the stages of component placement, reflow soldering, wave soldering, circuit board functional testing, coating of protective coatings, final inspection before shipment, fault analysis and repair, etc., to ensure product quality, identify and correct manufacturing defects, and conduct process monitoring and fault analysis.
[0018] like Figure 1 and Figure 2 As shown, a circuit board detection device based on a planar motor includes a camera 1 and a planar motor, and the planar motor is placed on a base 5. In this scheme, a planar permanent magnet synchronous motor, a magnetic suspension planar motor and the like can be used. The planar motor includes a mover 3 and a coil 4. The coil 4 can be evenly distributed on the plane or distributed according to the required magnetic field gradient. The magnetic field can be precisely controlled by multiple sets of independently controlled coil units, thereby precisely controlling the motion trajectory of the mover 3. In order to improve the power density and electromagnetic coupling efficiency of the motor, the coil 4 can adopt a multi-layer superposition structure, and each layer of coils 4 can be arranged according to a specific pitch and phase relationship to optimize the magnetic field distribution and reduce eddy current loss. The coil 4 can be arranged in a staggered manner, and the coils of different phases in adjacent layers or the same layer are staggered to reduce the discontinuity of the magnetic field and improve the dynamic performance of the motor. The mover 3 of the planar motor carries the circuit board 2 to be photographed, and the camera 1 is arranged above the planar motor and used to photograph the circuit board 2. The mover 3 moves relative to the camera 1 so that the plane of the circuit board 2 is parallel to the plane of the camera 1 and the circuit board 2 is located within the optimal imaging range of the camera 1, which is approximately 1-2 times the focal length of the camera 1. The types of camera 1 include but are not limited to ultra-high-speed cameras, intelligent industrial cameras, infrared cameras (including specific bands such as InGaAs cameras), dedicated cameras for lithography machines, scientific-grade CCD cameras, SWIR cameras, semiconductor cooling cameras, and industrial cameras customized for specific testing equipment.
[0019] The solution also includes a supporting control unit, which can be a PLC controller, an MCU controller, a DSP digital signal processor, etc., or an ARM chip and a DSP chip. The control unit identifies the clarity of the photo of the circuit board 2 taken by the camera 1, and uses the photo clarity as a feedback signal. After calculation, the position information of the clamping moving device and / or the planar motor of the camera 1 that should be moved or rotated is obtained, and then the relative posture of the camera 1 and / or the mover 5 is adjusted, and the clarity of the photo of the circuit board 2 taken by the camera 1 is effectively improved through closed-loop feedback.
[0020] Example 2
[0021] like Figure 1 and Figure 2As shown, a circuit board detection device based on a planar motor includes a camera 1 and a planar motor, and the planar motor is placed on a base 5. In this scheme, a planar permanent magnet synchronous motor, a magnetic suspension planar motor and the like can be used. The planar motor includes a mover 3 and a coil 4. The coil 4 can be evenly distributed on the plane or distributed according to the required magnetic field gradient. The magnetic field can be precisely controlled by multiple sets of independently controlled coil units, thereby precisely controlling the motion trajectory of the mover 3. In order to improve the power density and electromagnetic coupling efficiency of the motor, the coil 4 can adopt a multi-layer superposition structure, and each layer of coils 4 can be arranged according to a specific pitch and phase relationship to optimize the magnetic field distribution and reduce eddy current loss. The coil 4 can be arranged in a staggered manner, and the coils of different phases in adjacent layers or the same layer are staggered to reduce the discontinuity of the magnetic field and improve the dynamic performance of the motor. The mover 3 of the planar motor carries the circuit board 2 to be photographed, and the camera 1 is arranged above the planar motor and used to photograph the circuit board 2. The mover 3 moves relative to the camera 1 so that the plane of the circuit board 2 is parallel to the plane of the camera 1 and the circuit board 2 is located within the optimal imaging range of the camera 1, which is approximately 1-2 times the focal length of the camera 1.
[0022] During the shooting process, the position of the camera 1 is fixed, and the mover 3 moves relative to the camera 1. The control unit identifies the clarity of the photo of the circuit board 2 taken by the camera 1, and uses the clarity of the photo as a feedback signal to control the current change of the coil 4, generate electromagnetic thrust and torque, and control the movement and rotation of the mover 3 during the insertion process, thereby adjusting the position of the mover 3. The number of the moving parts is 1, which makes the signal feedback process simple and the response speed fast.
[0023] Example 3
[0024] like Figure 1 and Figure 2As shown, a circuit board detection device based on a planar motor includes a camera 1 and a planar motor, and the planar motor is placed on a base 5. In this scheme, a planar permanent magnet synchronous motor, a magnetic suspension planar motor and the like can be used. The planar motor includes a mover 3 and a coil 4. The coil 4 can be evenly distributed on the plane or distributed according to the required magnetic field gradient. The magnetic field can be precisely controlled by multiple sets of independently controlled coil units, thereby precisely controlling the motion trajectory of the mover 3. In order to improve the power density and electromagnetic coupling efficiency of the motor, the coil 4 can adopt a multi-layer superposition structure, and each layer of coils 4 can be arranged according to a specific pitch and phase relationship to optimize the magnetic field distribution and reduce eddy current loss. The coil 4 can be arranged in a staggered manner, and the coils of different phases in adjacent layers or the same layer are staggered to reduce the discontinuity of the magnetic field and improve the dynamic performance of the motor. The mover 3 of the planar motor carries the circuit board 2 to be photographed, and the camera 1 is arranged above the planar motor and used to photograph the circuit board 2. The mover 3 moves relative to the camera 1 so that the plane of the circuit board 2 is parallel to the plane of the camera 1 and the circuit board 2 is located within the optimal imaging range of the camera 1, which is approximately 1-2 times the focal length of the camera 1.
[0025] During the shooting process, both the camera 1 and the mover 3 move, and the clarity of the photo is improved through the cooperation of the two moving parts. The control unit identifies the clarity of the photo of the circuit board 2 taken by the camera 1, and uses the clarity of the photo as a feedback signal to control the movement of the clamping device of the camera 1 and the current change of the coil 4, generate electromagnetic thrust and torque, and control the movement and rotation of the mover 3 during the insertion process, thereby adjusting the posture of the mover 3. The clarity of the photo is improved through the cooperation of the two moving parts.
[0026] Specifically, the clamping device of camera 1 drives camera 1 to move in the Z-axis direction, and mover 3 moves along the X-axis and Y-axis, and can rotate around the X-axis, Y-axis and Z-axis. The moving distance in the Z-axis direction and the position adjustment amount of mover 3 within 5 degrees of freedom are calculated according to the clarity of the photo. The advantage is that due to the limited suspension force of the planar motor, a strong current is required to drive mover 3 to meet the long-distance movement in the Z-axis direction, and the energy loss cost is high. By adjusting the camera 1 to meet the adjustment of any distance in the Z-axis direction, energy loss is effectively reduced, and the difficulty of structural control can be reduced.
[0027] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications based on the present invention belong to the scope of protection required by the present invention.
Claims
1. A circuit board detection device based on a planar motor, characterized in that: The invention comprises a camera (1) and a planar motor, wherein a circuit board (2) to be photographed is carried on a mover (3) of the planar motor, the camera (1) is arranged above the planar motor and is used to photograph the circuit board (2), and the mover (3) and the camera (1) move relative to each other so that the plane of the circuit board (2) is parallel to the plane of the camera (1) and the circuit board (2) is located within the optimal imaging range of the camera (1).
2. A circuit board detection device based on a planar motor according to claim 1, characterized in that: During the shooting process, the position of the camera (1) is fixed, and the mover (3) moves relative to the camera (1).
3. A circuit board detection device based on a planar motor according to claim 2, characterized in that: It also includes a control unit, which adjusts the position and posture of the mover (3) according to the clarity of the photo of the circuit board taken by the camera (1).
4. A circuit board detection device based on a planar motor according to claim 1, characterized in that: During the filming process, both the camera (1) and the mover (3) move.
5. A circuit board detection device based on a planar motor according to claim 4, characterized in that: The camera (1) moves in the Z-axis direction, and the mover (3) moves along the X-axis and the Y-axis and can rotate around the X-axis, the Y-axis and the Z-axis.