Combined focusing micrometer with magnetic rotary arm
By designing a combined condenser micrometer with magnetic spiral arms, the camera position is dynamically adjusted by using magnetic spiral arms and moving mechanisms to achieve high-precision measurement of the printed circuit board, solving the problems of high measurement accuracy and cost in the prior art.
Patent Information
- Application Number
- CN202421609039.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-09
AI Technical Summary
The prior art is difficult to achieve the in-plane measurement accuracy of 10 micron or even 1 micron level of printed circuit boards, and the manufacturing and use of high-precision scanning platforms is complex, costly, and the storage and analysis operations of ultra-high resolution images are huge.
A combined condenser micrometer with magnetic spiral arm is designed, including a frame, a slider, a moving mechanism, a magnetic spiral arm, a condenser camera and a global camera. The camera position is dynamically adjusted through the magnetic spiral arm and a moving mechanism, and non-contact imaging measurement is performed using the condenser camera and a global camera.
It realizes precision measurements in a large scale range, avoiding the use of high-definition video cameras and high-precision scanning mechanisms, and has the advantages of simple structure, high measurement accuracy, and low manufacturing and maintenance costs.
Smart Images
Figure CN222865838U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of industrial automation equipment, in particular to a combined focusing micrometer with a magnetic suction rotary arm. Background Art
[0002] In the field of electronic industry manufacturing, the manufacturing process of printed circuit boards involves the precise measurement of the lateral deformation of the intermediate board products during the manufacturing process of printed circuit boards. The measurement accuracy is required to be at the level of 10 microns or even 1 micron, and only non-contact photographic measurement can be used. In principle, as long as the high-definition image of the board product can be captured by the camera, the camera can be calibrated in advance, and the pre-made special marking points in the captured image can be identified and located by the image processing algorithm, the scale and deformation within the board surface of the printed circuit board can be measured. For circuit boards with a size of hundreds of millimeters, to achieve an in-plane measurement accuracy of 10 microns or even 1 micron, the resolution of the camera must be at least tens or even tens of billions of pixels, and such a camera is difficult to achieve in terms of technical availability and cost control.
[0003] Currently, the economically available direct measurement method with a camera can only measure printed circuits with a size of tens of millimeters and a precision requirement of 1 micron, or printed circuit boards with a size of hundreds of millimeters and a precision requirement of 10 microns. Alternatively, a scanning and splicing method is used to scan a large-format printed circuit board with an economical resolution camera and a high-precision scanning platform to obtain a high-definition large-format image, thereby obtaining an ultra-high-resolution image required for high-precision measurement. However, this has the following disadvantages: the manufacture and use of a high-precision scanning platform is difficult and expensive to adjust, and the ultra-high-resolution image obtained by scanning has very demanding requirements for computer storage, and the resulting analysis and calculation volume is huge, resulting in the existing precision measurement of printed circuit boards. It is difficult to solve the actual demand problems from a technical and economic perspective. Utility Model Content
[0004] The purpose of the utility model is to provide a combined focusing micrometer with a magnetic rotary arm to overcome the above-mentioned defects in the prior art.
[0005] A combined focus micrometer with a magnetic rotary arm comprises a frame, a slide plate, a moving mechanism, a magnetic rotary arm, a focus camera and a global camera. The frame is provided with a detection platform, the detection platform is provided with a calibration plate, a support frame is provided on the top rear side of the frame, a fixed frame is vertically provided on the front side of the support frame, the slide plate is slidably connected to the fixed frame and moves under the drive of the moving mechanism, the four corners of the bottom of the slide plate are respectively provided with focus cameras through magnetic rotary arms, and the global camera is arranged on the inner side of the support frame.
[0006] Preferably, the slide plate comprises an upper aluminum alloy substrate and a lower ferromagnetic veneer.
[0007] Preferably, the moving mechanism includes a guide rail, a motor, a synchronous wheel one and a synchronous wheel two, the guide rail is arranged on a fixed frame, the bottom of the ferromagnetic veneer is slidably connected to the guide rail through a plurality of sliders, the motor is installed at one end of the fixed frame and a synchronous wheel one is installed on its output shaft, the synchronous wheel two is rotatably connected to the other end of the fixed frame, the synchronous wheel one and the synchronous wheel two are connected by a synchronous belt, and the bottom of the ferromagnetic veneer is connected to the synchronous belt.
[0008] Preferably, two guide rails are provided and are symmetrically arranged on two rail seats on the connecting frame.
[0009] Preferably, the magnetic rotary arm includes a magnetic seat, a small rotary arm and a large rotary arm. A wrist-jointed core shaft plugged into the magnetic seat is provided on the camera flange plate of the focusing camera. The wrist-jointed core shaft is abutted against the magnetic seat by a tightening screw. The magnetic seat can be releasably adsorbed on the bottom of the ferromagnetic surface. The small rotary arm is rotatably connected to the wrist-jointed core shaft. The large rotary arm is rotatably connected to the elbow-jointed core shaft on the small rotary arm. The other end of the large rotary arm is rotatably connected to the hanging core shaft. A rubber buffer block is provided on the upper part of the hanging core shaft. The rubber buffer block is connected to the aluminum alloy substrate and the ferromagnetic surface by fastening screws.
[0010] Preferably, the focusing camera, global camera and motor are electrically connected to a control computer.
[0011] The utility model has the following advantages:
[0012] The utility model has magnetic rotary arms connected to focusing cameras at the four corners of the bottom of the slide respectively, and the position of the focusing camera is adjusted by the large rotary arm and the small rotary arm of the magnetic rotary arm, and the slide is moved on the guide rail by a moving mechanism, that is, the position of the camera relative to the measured workpiece can be dynamically adjusted according to the specific situation of the measured object, and the relative position of this group of cameras can be preset and fixed by the rigidity of the slide, and a plurality of specific marking points on the workpiece can be respectively captured by the camera for non-contact imaging measurement, so as to obtain precise measurement of a large scale range, thereby avoiding the use of high-definition cameras and high-precision scanning mechanisms, and having the advantages of simple structure, high measurement accuracy, low manufacturing and maintenance costs, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.
[0014] Figure 2 It is a structural schematic diagram of the slide plate, magnetic rotary arm and focusing camera of the utility model.
[0015] Among them: 1. Frame; 2. Detection platform; 3. Calibration plate; 4. Support frame; 5. Fixed frame; 6. Moving mechanism; 61. Slide plate; 611. Aluminum alloy substrate; 612. Ferromagnetic veneer; 62. Guide rail; 621. Rail seat; 63. Slider; 64. Motor; 65. Synchronous wheel one; 66. Synchronous wheel two; 67. Synchronous belt; 7. Magnetic rotary arm; 71. Wrist-joined spindle; 72. Magnetic seat; 73. Tightening screw; 74. Small rotary arm; 75. Large rotary arm; 76. Elbow-joined spindle; 77. Hanging spindle; 78. Rubber buffer block; 79. Fastening screw; 8. Focusing camera; 81. Camera flange plate; 9. Global camera; 10. Control computer. DETAILED DESCRIPTION
[0016] The specific implementation methods of the utility model are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the utility model.
[0017] like Figure 1-2 As shown, the utility model provides a combined focusing micrometer with a magnetic rotary arm 7, comprising a frame 1, a slide plate 61, a moving mechanism 6, a magnetic rotary arm 7, a focusing camera 8 and a global camera 9, the frame 1 is provided with a detection platform 2, the detection platform 2 is provided with a calibration plate 3, the top rear side of the frame 1 is provided with a support frame 4, the front side of the support frame 4 is vertically provided with a fixed frame 5, the slide plate 61 is slidably connected to the fixed frame 5 and moves under the drive of the moving mechanism 6, the four corners of the bottom of the slide plate 61 are respectively provided with focusing cameras 8 through the magnetic rotary arms 7, and the global camera 9 is arranged on the inner side of the support frame 4.
[0018] It should be noted that the slide plate 61 includes an upper aluminum alloy substrate 611 and a lower ferromagnetic surface 612 , and the magnetic seat 72 of the magnetic rotary arm 7 is adsorbed and fixed by the ferromagnetic surface 612 .
[0019] In addition, the moving mechanism 6 includes a guide rail 62, a motor 64, a synchronous wheel 1 65 and a synchronous wheel 2 66. The guide rail 62 is provided with two rail seats 621 symmetrically arranged on the connecting frame. The bottom of the ferromagnetic surface 612 is slidably connected to the guide rail 62 through a plurality of sliders 63. The motor 64 is installed at one end of the fixed frame 5 and a synchronous wheel 1 65 is installed on its output shaft. The synchronous wheel 2 66 is rotatably connected to the other end of the fixed frame 5. The synchronous wheel 1 65 and the synchronous wheel 2 66 are connected by a synchronous belt 67. The bottom of the ferromagnetic surface 612 is connected to the synchronous belt 67.
[0020] The focusing camera 8, the global camera 9 and the motor 64 are electrically connected to the control computer 10, and the focusing camera 8, the global camera 9 and the motor 64 are controlled by the control computer 10;
[0021] In addition, the magnetic rotary arm 7 includes a magnetic seat 72, a small rotary arm 74 and a large rotary arm 75. The camera flange plate 81 of the focusing camera 8 is provided with a wrist-jointed core shaft 71 inserted into the magnetic seat 72. The wrist-jointed core shaft 71 is abutted against the magnetic seat 72 through a tightening screw 73. The magnetic seat 72 can be releasably adsorbed on the bottom of the ferromagnetic surface 612. The small rotary arm 74 is rotatably connected to the wrist-jointed core shaft 71. The large rotary arm 75 is rotatably connected to the elbow-jointed core shaft 76 on the small rotary arm 74. The other end of the large rotary arm 75 is rotatably connected to the hanging core shaft 77. A rubber buffer block 78 is provided on the upper part of the hanging core shaft 77. The rubber buffer block 78 is connected to the aluminum alloy substrate 611 and the ferromagnetic surface 612 through a fastening screw 79. The position of the focusing camera 8 is adjusted by the magnetic rotary arm 7.
[0022] First, the device needs to be calibrated. The calibration process is as follows:
[0023] Among them, the calibration process of the global camera 9 and the four focusing cameras 8 is as follows: the calibration plate 3 is placed on the left side of the detection platform 2, directly below the global camera 9, and the magnetic seat 72 is removed from the ferromagnetic surface 612. At this time, the small rotary arm 74 and the large rotary arm 75 can be adjusted so that the fields of view of the four focusing cameras are respectively located near the four corners of the calibration plate 3, and the magnetic seat 72 is adsorbed and fixed to the ferromagnetic surface 612, and then the motor 64 is controlled by the control computer 10 to drive the slide 61 to move to the right along the guide rail 62. At this time, the global camera 9 can see the global image of the calibration plate 3, and the global image of the calibration plate 3 is collected through the system software and the global camera 9 is calibrated. Then, the motor 64 is controlled by the control computer 10 to drive the slide 61 to move to the left side. At this time, the four focusing cameras can respectively see the partial images of the calibration plate 3 located below the four focusing cameras 8 on the calibration plate 3, and the partial images of the calibration plate 3 below the four focusing cameras 8 are collected through the system software and the four focusing cameras 8 are calibrated.
[0024] Then start the measurement. The measurement process consists of two steps, namely collecting the template and measuring the workpiece. The process is as follows:
[0025] 1) Collecting templates: Place the template workpiece directly below the global camera 9, and the global image of the template workpiece can be seen through the system software. Then, release the magnetic seat 72 from the ferromagnetic surface 612, adjust the small rotary arm 74 and the large rotary arm 75 so that the fields of view of the four focusing cameras respectively display the measurement mark points prefabricated on the template workpiece near its four corners, and adsorb and fix the magnetic seat 72 to the ferromagnetic surface 612. At this time, the relative positions of the four focusing cameras are fixed, and the system software is used to accurately measure the high-precision positions of the four measurement mark points seen by the four focusing cameras respectively relative to their corresponding fields of view of the focusing cameras, and superimpose them with the four measurement mark points and their relative positions of the template workpiece identified from the panoramic image collected by the global camera 9, so as to obtain the high-precision positions of the four measurement mark points relative to each other as the reference values for the size and deformation measurement of the current batch of workpieces.
[0026] 2) Measure the workpiece: After that, in the production process, any workpiece to be sampled is placed near the original position of the sample workpiece in front (no precise alignment is required). Since the relative positions between the four focusing cameras are fixed, at this time, it is only necessary to accurately determine the positions of the four measurement mark points on the sampled workpiece relative to the field of view of each corresponding camera through the system software, and the precise positions of the four measurement mark points of the sampled workpiece relative to each other can be accurately calculated, so that high-precision size and deformation measurement can be achieved using a camera with limited resolution. Moreover, for the measurement of batches of workpieces, it is only necessary to repeat process 2).
[0027] The utility model ensures the stability of the measurement system by using the rigidity of the slide plate 61 to constrain the preset positioning of four focusing cameras, and uses the small field of view high-precision image measurement characteristics of the focusing camera, in conjunction with the prefabricated measurement marking points on the workpiece, to achieve high-precision measurement of large-format workpieces.
[0028] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.
Claims
1. A combined focusing micrometer with a magnetic rotary arm, characterized in that: The invention comprises a frame (1), a slide plate (61), a moving mechanism (6), a magnetic rotary arm (7), a focusing camera (8) and a global camera (9); the frame (1) is provided with a detection platform (2), the detection platform (2) is provided with a calibration plate (3), a support frame (4) is provided on the top rear side of the frame (1), a fixed frame (5) is vertically provided on the front side of the support frame (4), the slide plate (61) is slidably connected to the fixed frame (5) and moves under the drive of the moving mechanism (6), the four corners at the bottom of the slide plate (61) are respectively provided with focusing cameras (8) through magnetic rotary arms (7), and the global camera (9) is arranged on the inner side of the support frame (4).
2. The combined focusing micrometer with a magnetic rotary arm according to claim 1, characterized in that: The slide plate (61) comprises an upper aluminum alloy substrate (611) and a lower ferromagnetic surface (612).
3. The combined focusing micrometer with a magnetic rotary arm according to claim 2 is characterized in that: The moving mechanism (6) comprises a guide rail (62), a motor (64), a first synchronous wheel (65) and a second synchronous wheel (66); the guide rail (62) is arranged on a fixed frame (5); the bottom of the ferromagnetic surface (612) is slidably connected to the guide rail (62) via a plurality of sliders (63); the motor (64) is mounted on one end of the fixed frame (5) and a first synchronous wheel (65) is mounted on its output shaft; the second synchronous wheel (66) is rotatably connected to the other end of the fixed frame (5); the first synchronous wheel (65) and the second synchronous wheel (66) are connected via a synchronous belt (67); and the bottom of the ferromagnetic surface (612) is connected to the synchronous belt (67).
4. The combined focusing micrometer with a magnetic rotary arm according to claim 3 is characterized in that: The guide rail (62) is provided with two rail seats (621) symmetrically arranged on the connecting frame.
5. The combined focusing micrometer with a magnetic rotary arm according to claim 3 is characterized in that: The magnetic suction arm (7) comprises a magnetic suction seat (72), a small suction arm (74) and a large suction arm (75); a camera flange plate (81) of the focusing camera (8) is provided with a wrist-jointed core shaft (71) plugged into the magnetic suction seat (72); the wrist-jointed core shaft (71) is in contact with the magnetic suction seat (72) via a tightening screw (73); the magnetic suction seat (72) can be releasably adsorbed on the bottom of the ferromagnetic surface (612); the small suction arm (74) is provided with a wrist-jointed core shaft (71) plugged into the magnetic suction seat (72); the wrist-jointed core shaft (71) is in contact with the magnetic suction seat (72) via a tightening screw (73); the magnetic suction seat (72) can be releasably adsorbed on the bottom of the ferromagnetic surface (612); The arm (74) is rotatably connected to the wrist joint core shaft (71), the large swing arm (75) is rotatably connected to the elbow joint core shaft (76) on the small swing arm (74), the other end of the large swing arm (75) is rotatably connected to the hanging core shaft (77), and a rubber buffer block (78) is provided on the upper part of the hanging core shaft (77), and the rubber buffer block (78) is connected to the aluminum alloy substrate (611) and the ferromagnetic veneer (612) through a fastening screw (79).
6. The combined focusing micrometer with a magnetic rotary arm according to claim 3, characterized in that: The focusing camera (8), the global camera (9) and the motor (64) are electrically connected to the control computer (10).