Combined focusing micrometer with cross-shaped sliding table

Abstract

The utility model discloses a combined type focusing micrometer with a cross-shaped sliding table, which relates to the technical field of industrial automation equipment and comprises a rack, the cross-shaped sliding table, a sliding module, a focusing camera and a global camera, a detection carrying table is arranged on the rack, a calibration plate is arranged on the detection carrying table, and a fixing frame is arranged on the rear side of the top of the rack. When the device is used, the group of cameras arranged on the plurality of cross-shaped sliding tables below the rigid sliding plate are utilized, so that the positions of the group of cameras relative to a measured workpiece can be dynamically adjusted according to the specific condition of a measured object, and the relative positions of the group of cameras can be preset and fixed by utilizing the rigidity of the sliding plate; and a plurality of specific mark points on the workpiece are respectively shot by the camera to carry out non-contact imaging measurement, so that large-scale precision measurement is obtained. According to the utility model, a high-definition camera and a high-precision scanning mechanism are avoided, and the device has the advantages of simple structure, high measurement precision, low manufacturing and maintenance cost and the like.

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 cross slide. 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] At present, the economically available direct measurement method of the camera can only measure the printed circuit with a size of tens of millimeters and an accuracy requirement of 1 micron, or the printed circuit board with a size of hundreds of millimeters and an accuracy requirement of 10 microns. Alternatively, the scanning and splicing method is used to scan the large-format printed circuit board with an economically available resolution camera and a high-precision scanning platform to obtain a high-definition large-format image, thereby obtaining the ultra-high-resolution image required for high-precision measurement. However, the technical and cost disadvantages are as follows: the manufacture and use of the high-precision scanning platform are 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 amount is huge. All these make it difficult for the existing precision measurement of printed circuit boards to solve the actual demand problems from a technical and economic perspective.

[0004] Therefore, it is necessary to develop a device for high-precision size and deformation measurement of printed circuit boards that does not require an ultra-high-resolution camera or a high-precision scanning platform, so that it is technically and economically feasible and easy to operate. Utility Model Content

[0005] The utility model aims to provide a combined focusing micrometer with a cross slide to overcome the above-mentioned defects in the prior art.

[0006] A combined focus micrometer with a cross slide comprises a frame, a cross slide, a sliding module, 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 fixed frame is provided on the top rear side of the frame, a connecting frame arranged parallel to the frame is provided on the fixed frame, the sliding module is arranged on the connecting frame and the slide thereon moves under the action of the driving module, the focus camera is provided with four cross slides respectively arranged near the four corners of the bottom of the slide, and the global camera is arranged on the inner side of the fixed frame.

[0007] Preferably, the sliding module comprises a guide rail and a slider, the guide rail is arranged on a connecting frame, and the bottom of the slide plate is slidably connected to the guide rail via a plurality of sliders.

[0008] Preferably, two guide rails are provided and are symmetrically arranged on two rail seats on the connecting frame.

[0009] Preferably, the driving module includes a motor, a synchronous wheel 1 and a synchronous wheel 2. The motor is installed at one end of the connecting frame and a synchronous wheel 1 is installed on its output shaft. The synchronous wheel 2 is rotatably connected to the other end of the connecting frame. The synchronous wheel 1 and the synchronous wheel 2 are connected by a synchronous belt, and the bottom of the skateboard is connected to the synchronous belt.

[0010] Preferably, the focusing camera, global camera and motor are electrically connected to an operating computer.

[0011] The utility model has the following advantages:

[0012] When the utility model is used, a group of cameras on multiple cross slides arranged under the rigid slide can be used to dynamically adjust the position of the group of cameras relative to the workpiece to be measured according to the specific situation of the measured object, and the relative position of the group of cameras can be preset and fixed by the rigidity of the slide, and the cameras can be used to respectively capture multiple specific marking points on the workpiece for non-contact imaging measurement, thereby obtaining precision measurement of a large scale range. The utility model avoids the use of high-definition cameras and high-precision scanning mechanisms, and has the advantages of simple structure, high measurement accuracy, and low manufacturing and maintenance costs. 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 cross slide and the focusing camera of the utility model.

[0015] Among them: 1. Rack; 2. Test platform; 3. Calibration plate; 4. Fixed frame; 5. Connecting frame; 6. Sliding module; 61. Slide plate; 62. Guide rail; 63. Slider; 64. Rail seat; 7. Drive module; 71. Motor; 72. Synchronous wheel one; 73. Synchronous wheel two; 74. Synchronous belt; 8. Focus camera; 9. Cross slide; 10. Global camera; 100. Operating computer; 101. Electrical board to be tested. 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 cross slide 9, including a frame 1, a sliding module 6, a focusing camera 8, a cross slide 9 and a global camera 10, 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 fixed frame 4, the fixed frame 4 is provided with a connecting frame 5 arranged parallel to the frame 1, the sliding module 6 is arranged on the connecting frame 5 and the slide 61 thereon moves under the action of the driving module 7, the focusing camera 8 is provided with four cross slides 9 respectively arranged near the four corners of the bottom of the slide 61, and the global camera 10 is arranged on the inner side of the fixed frame 4.

[0018] It should be noted that the sliding module 6 includes a guide rail 62 and a slider 63. The guide rail 62 is arranged on the connecting frame 5. The guide rail 62 has two rail seats 64 symmetrically arranged on the connecting frame 5. The bottom of the slide 61 is slidably connected to the guide rail 62 through a plurality of sliders 63.

[0019] In addition, the driving module 7 includes a motor 71, a synchronous wheel 1 72 and a synchronous wheel 2 73. The motor 71 is installed at one end of the connecting frame 5 and a synchronous wheel 1 72 is installed on its output shaft. The synchronous wheel 2 73 is rotatably connected to the other end of the connecting frame 5. The synchronous wheel 1 72 and the synchronous wheel 2 73 are connected by a synchronous belt 74. The bottom of the slide plate 61 is connected to the synchronous belt 74.

[0020] The focusing camera 8 , the global camera 10 and the motor 71 are electrically connected to the operating computer 100 , and the focusing camera 8 , the global camera 10 and the motor 71 are controlled by the operating computer 100 .

[0021] Before the equipment is put into measurement, it is necessary to calibrate the equipment first. The calibration process is as follows:

[0022] The calibration process of the global camera 10 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 10. The fields of view of the four focusing cameras 8 are respectively located near the four corners of the calibration plate 3 by adjusting the cross slide 9 and locking the cross slide 9. Then, the operating computer 100 is used to control the motor 71. The synchronous wheel 72 on the output shaft of the motor 71 drives the slide 61 to move to the right through the synchronous belt 74. At this time, the global camera 10 can see the global image of the calibration plate 3. The global image of the calibration plate 3 is collected through the system software and the global camera 10 is calibrated.

[0023] Then, use the operating computer 100 to control the motor 71 to drive the slide 61 to move to the left side. At this time, the four focusing cameras 8 can respectively see the partial image of the calibration plate 3 located below the four focusing cameras 8 on the calibration plate 3. The partial image of the calibration plate 3 below the four focusing cameras 8 is 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 under the global camera 10, and the global image of the template workpiece can be seen through the system software. Then adjust the cross slide 9 so that the fields of view of the four focusing cameras 8 respectively display the measurement mark points prefabricated on the template workpiece near its four corners and lock the cross slide 9. At this time, the relative positions of the four focusing cameras 8 are fixed, and the system software accurately measures the high-precision positions of the four measurement mark points seen by the four focusing cameras 8 relative to their corresponding fields of view, and superimposes 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 10, 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 to be inspected.

[0026] 2) Measuring workpieces: Thereafter, during the production process, any randomly selected electrical board 101 to be inspected is placed near the original placement of the sample workpiece in front (no precise alignment is required). Since the relative positions between the four focusing cameras 8 are already 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] In summary, the utility model ensures the stability of the measurement system by utilizing the rigidity of the slide plate 61 to constrain the preset positioning of the four focusing cameras, utilizes the small field of view and high-precision image measurement characteristics of the focusing camera, and cooperates 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 cross slide, comprising a cross slide (9), characterized in that: It also includes a frame (1), a sliding module (6), a focusing camera (8) and a global camera (10), wherein the frame (1) is provided with a detection platform (2), the detection platform (2) is provided with a calibration plate (3), a fixing frame (4) is provided on the top rear side of the frame (1), the fixing frame (4) is provided with a connecting frame (5) arranged parallel to the frame (1), the sliding module (6) is arranged on the connecting frame (5) and the slide plate (61) thereon moves under the action of the driving module (7), the focusing camera (8) is provided with four and respectively arranged on a cross slide (9) near the four corners of the bottom of the slide plate (61), and the global camera (10) is arranged on the inner side of the fixing frame (4).

2. The combined focusing micrometer with a cross slide according to claim 1, characterized in that: The sliding module (6) comprises a guide rail (62) and a sliding block (63); the guide rail (62) is arranged on the connecting frame (5); and the bottom of the sliding plate (61) is slidably connected to the guide rail (62) via a plurality of sliding blocks (63).

3. The combined focusing micrometer with a cross slide according to claim 2 is characterized in that: The guide rail (62) is provided with two rail seats (64) symmetrically arranged on the connecting frame (5).

4. The combined focusing micrometer with a cross slide according to claim 1, characterized in that: The driving module (7) comprises a motor (71), a synchronous wheel 1 (72) and a synchronous wheel 2 (73); the motor (71) is mounted on one end of the connecting frame (5) and the synchronous wheel 1 (72) is mounted on the output shaft of the motor; the synchronous wheel 2 (73) is rotatably connected to the other end of the connecting frame (5); the synchronous wheel 1 (72) and the synchronous wheel 2 (73) are connected via a synchronous belt (74); and the bottom of the slide plate (61) is connected to the synchronous belt (74).

5. The combined focusing micrometer with a cross slide according to claim 4 is characterized in that: The focusing camera (8), the global camera (10) and the motor (71) are electrically connected to the operating computer (100).

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