High-precision device for measuring difference between thickness of circuit board and height of golden finger
Through the combination of spectral confocal laser displacement sensor and navigation camera, the problem of existing equipment being sensitive to deformed circuit boards and colors is solved, and high-precision measurement and adaptability are achieved, which is suitable for the detection of small circuit boards.
Patent Information
- Application Number
- CN202420537099.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-19
AI Technical Summary
Existing equipment for high-precision measurement of circuit board thickness and gold finger copper plating has limitations, and cannot effectively measure deformation or flexible circuit boards, and is sensitive to workpiece color, resulting in measurement errors and narrow product range.
The spectral confocal laser displacement sensor and navigation camera are used to adjust the height and position of the laser displacement sensor through fine-tuning lifting platform, forming a counter-surface structure, eliminating color errors, improving measurement accuracy, and assisting positioning through navigation cameras, making it easy to measure small circuit boards.
High-precision measurement is achieved, color errors are eliminated, and the inspection of more products, especially small circuit boards is adapted to improve the practicality of the equipment and measurement accuracy.
Smart Images
Figure CN222144056U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit board detection, in particular to a device for measuring the thickness of a circuit board and the height difference of a gold finger with high precision. Background Art
[0002] In the prior art, circuit boards are widely used in the electronics field. There are two types of equipment currently used to measure the thickness of circuit boards and the thickness of gold finger copper plating with high roughness: one is a single triangle laser non-contact measuring machine, which works by irradiating a laser at a fixed angle on a flat plate. Different plate thicknesses will reflect back lasers at different angles, and the plate thickness is calculated through an algorithm. When this type of circuit board is deformed or it is a flexible circuit board, the machine cannot measure it. The accuracy is 0.1-0.05mm, and the applicable product surface is relatively narrow;
[0003] The other is a double triangle laser non-contact measuring machine. The principle is to add another laser under the circuit board on the basis of the first one, forming two laser beams. The difference in the measured data can be used to get the thickness of the circuit board, which can solve the problem of deformation or flexible circuit boards. However, this equipment is very sensitive to the color of the workpiece. Different colors have different reflectivity. For the same thickness but different colors, the error is 0.05-0.01mm. Because there is also a laser head below, a 40X80mm square hole must be dug on the worktable. With this structural design, small workpieces cannot be measured. These two factors cannot meet the requirements of high precision and adaptability to more products.
[0004] In summary, there are currently two types of equipment used to measure the thickness of high-roughness circuit boards and the thickness of gold finger copper plating, both of which have limitations and poor practicality. Utility Model Content
[0005] In view of this, it is necessary to provide a device for measuring the thickness of circuit boards and the height difference of gold fingers with high precision, so as to at least solve the problem that two existing devices for measuring the thickness of circuit boards and the copper plating thickness of gold fingers with high roughness in the related art have limitations.
[0006] The embodiment of the present application provides a device for measuring the thickness of a circuit board and the height difference of a gold finger with high precision, which comprises a frame, and a workbench and a detection mechanism all arranged on the frame, wherein the detection mechanism comprises a fixing device, an adjusting device and a detection device, wherein the fixing device is arranged on the frame, the adjusting device comprises a U-shaped plate and two fine-tuning lifting platforms, wherein the U-shaped plate is arranged horizontally on the fixing device, and the two fine-tuning lifting platforms are respectively arranged at the upper and lower sides of the U-shaped plate, the detection device comprises two spectral confocal laser displacement sensors and a navigation camera, wherein the two spectral confocal laser displacement sensors are respectively arranged at the two fine-tuning lifting platforms, and the navigation camera is arranged on the U-shaped plate and located on one side of the spectral confocal laser displacement sensor; wherein the spectral confocal laser displacement sensor is used to detect the thickness of the circuit board and the height difference of the gold finger, and the navigation camera is used to assist in positioning the position of the PCB board to be measured.
[0007] In one embodiment, the two fine-tuning lifting platforms are divided into an upper fine-tuning lifting platform and a lower fine-tuning lifting platform, the upper fine-tuning lifting platform is arranged at the upper side of the U-shaped plate, and the lower fine-tuning lifting platform is arranged at the lower side of the U-shaped plate, and the two spectral confocal laser displacement sensors are divided into an upper spectral confocal laser displacement sensor and a lower spectral confocal laser displacement sensor, the upper spectral confocal laser displacement sensor is arranged at the upper fine-tuning lifting platform, and the lower spectral confocal laser displacement sensor is arranged at the lower fine-tuning lifting platform: wherein the upper fine-tuning lifting platform is used to adjust the height of the upper spectral confocal laser displacement sensor on the upper side of the U-shaped plate, and the lower fine-tuning lifting platform is used to adjust the height of the lower spectral confocal laser displacement sensor on the lower side of the U-shaped plate.
[0008] In one of the embodiments, the workbench is arranged at the opening of the U-shaped plate and is located between the upper fine-tuning lifting platform and the lower fine-tuning lifting platform. The workbench is provided with a detection hole for allowing the laser beams emitted by the two spectral confocal laser displacement sensors to pass through. The laser beams emitted by the upper spectral confocal laser displacement sensor and the laser beams emitted by the lower spectral confocal laser displacement sensor are opposite to each other and are located on the same straight line.
[0009] In one embodiment, the upper fine-tuning lifting platform and the lower fine-tuning lifting platform both include a fixed seat, a lifting seat, a slide rail and a slider, the fixed seat is fixed on the U-shaped plate, the slide rail is arranged on the fixed seat, the slider is slidably arranged on the slide rail, the lifting seat is fixed on the slider, the upper spectral confocal laser displacement sensor is arranged on the lifting seat of the upper fine-tuning lifting platform, and the lower spectral confocal laser displacement sensor is arranged on the lifting seat of the lower fine-tuning lifting platform; wherein the lifting seat moves up and down by sliding the slider on the slide rail arranged on the fixed seat.
[0010] In one embodiment, the U-shaped plate includes an upper horizontal plate, a side vertical plate and a lower horizontal plate that are integrally formed, the side vertical plate is arranged between the upper horizontal plate and the lower horizontal plate, the upper fine-tuning lifting platform and the navigation camera are both arranged on the upper horizontal plate, the lower fine-tuning lifting platform is arranged on the lower horizontal plate, and the side vertical plate is fixed to the fixing device.
[0011] In one of the embodiments, the workbench is provided with a retractable plate for placing a keyboard.
[0012] In one of the embodiments, the outer side of the adjustment device is covered with a protective shell.
[0013] The beneficial effects of the utility model are as follows: the application adopts a spectral confocal laser displacement sensor to replace the structural design of two triangular laser displacement sensors to eliminate errors occurring in workpieces of different colors and improve measurement accuracy. The spectral confocal laser displacement sensor is installed on a fine-tuning lifting platform to form an integrated structural design, which is convenient for debugging the coincidence of the laser beam center points of the upper and lower spectral confocal laser displacement sensors. A 5 mm detection hole is set on the workbench according to the laser position to solve the problem of detecting small circuit boards. The laser of the spectral confocal laser displacement sensor can be emitted to the lower surface of the measured circuit board. At the same time, a new structural design of a navigation camera is added to find the measurement position faster, with accurate measurement, easy use and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;
[0015] Figure 2 A schematic diagram of a local structure of an embodiment of the present application;
[0016] Figure 3 A schematic diagram of the structure of a workbench according to an embodiment of the present application;
[0017] Figure 4 A schematic diagram of the structure of the detection mechanism of an embodiment of the present application;
[0018] Figure 5 This is a schematic diagram of the structure of the fine-tuning lifting platform of an embodiment of the present application. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly mounted on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.
[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.
[0022] See also Figures 1 to 5 The embodiment of the present application is a device for high-precision measurement of circuit board thickness and gold finger height difference, which includes a frame 100, and a workbench 200 and a detection mechanism 300 both arranged on the frame 100, the detection mechanism 300 includes a fixing device 31, an adjusting device 32 and a detection device 33, the fixing device 31 is arranged on the frame 100, the adjusting device 32 includes a U-shaped plate 321 and two fine-tuning lifting platforms, the U-shaped plate 321 is transversely arranged on the fixing device 31, the two fine-tuning lifting platforms are respectively arranged at the upper and lower sides of the U-shaped plate 321, the detection device 33 includes two spectral confocal laser displacement sensors and a navigation camera 331, the two spectral confocal laser displacement sensors are respectively arranged at the two fine-tuning lifting platforms, the navigation camera 331 is arranged on the U-shaped plate 321 and is located on one side of the spectral confocal laser displacement sensor; wherein, the spectral confocal laser displacement sensor is used to detect the circuit board thickness and the gold finger height difference, and the navigation camera 331 is used for auxiliary positioning of the PCB board to be measured.
[0023] In some optional embodiments, the two fine-tuning lifting platforms are divided into an upper fine-tuning lifting platform 322 and a lower fine-tuning lifting platform 323, the upper fine-tuning lifting platform 322 is arranged at the upper side of the U-shaped plate 321, and the lower fine-tuning lifting platform 323 is arranged at the lower side of the U-shaped plate 321, and the two spectral confocal laser displacement sensors are divided into an upper spectral confocal laser displacement sensor 332 and a lower spectral confocal laser displacement sensor 333, the upper spectral confocal laser displacement sensor 332 is arranged at the upper fine-tuning lifting platform 322, and the lower spectral confocal laser displacement sensor 333 is arranged at the lower fine-tuning lifting platform 323; wherein, the upper fine-tuning lifting platform 322 is used to adjust the height of the upper spectral confocal laser displacement sensor 332 on the upper side of the U-shaped plate 321, and the lower fine-tuning lifting platform 323 is used to adjust the height of the lower spectral confocal laser displacement sensor 333 on the lower side of the U-shaped plate 321.
[0024] In some optional embodiments, the workbench 200 is disposed at the opening of the U-shaped plate 321 and is located between the upper fine-tuning lifting platform 322 and the lower fine-tuning lifting platform 323. A detection hole 21 is opened on the workbench 200 for the laser beams emitted by the two spectral confocal laser displacement sensors to pass through. The laser beams emitted by the upper spectral confocal laser displacement sensor 332 and the laser beams emitted by the lower spectral confocal laser displacement sensor 333 pass through the detection hole 21 and are reflected on each other and are located on the same straight line.
[0025] In some optional embodiments, the upper fine-tuning lifting platform 322 and the lower fine-tuning lifting platform 323 both include a fixed seat 3221, a lifting seat 3222, a slide rail 3223 and a slider, the fixed seat 3221 is fixed on the U-shaped plate 321, the slide rail 3223 is arranged on the fixed seat 3221, the slider is slidably arranged on the slide rail 3223, the lifting seat 3222 is fixed on the slider, the upper spectral confocal laser displacement sensor 332 is arranged on the lifting seat 3222 of the upper fine-tuning lifting platform 322, and the lower spectral confocal laser displacement sensor 333 is arranged on the lifting seat 3222 of the lower fine-tuning lifting platform 323; wherein the lifting seat 3222 moves up and down by sliding the slider on the slide rail 3223 arranged on the fixed seat 3221.
[0026] In some optional embodiments, the U-shaped plate 321 includes an integrally formed upper horizontal plate 3211, a side vertical plate 3212 and a lower horizontal plate 3213, the side vertical plate 3212 is arranged between the upper horizontal plate 3211 and the lower horizontal plate 3213, the upper fine-tuning lifting platform 322 and the navigation camera 331 are both arranged on the upper horizontal plate 3211, the lower fine-tuning lifting platform 323 is arranged on the lower horizontal plate 3213, and the side vertical plate 3212 is fixed to the fixing device 31.
[0027] In some optional embodiments, a retractable plate 22 for placing a keyboard is provided on the workbench 200 .
[0028] In one embodiment, the outer side of the adjustment device 32 is covered with a protective shell 324 .
[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A device for measuring the thickness of a circuit board and the height difference of a gold finger with high precision, characterized in that: It includes a frame, and a workbench and a detection mechanism all arranged on the frame, the detection mechanism includes a fixing device, an adjusting device and a detection device, the fixing device is arranged on the frame, the adjusting device includes a U-shaped plate and two fine-tuning lifting platforms, the U-shaped plate is transversely arranged on the fixing device, the two fine-tuning lifting platforms are respectively arranged at the upper and lower sides of the U-shaped plate, the detection device includes two spectral confocal laser displacement sensors and a navigation camera, the two spectral confocal laser displacement sensors are respectively arranged at the two fine-tuning lifting platforms, the navigation camera is arranged on the U-shaped plate and located on one side of the spectral confocal laser displacement sensor; wherein the spectral confocal laser displacement sensor is used to detect the thickness of the circuit board and the height difference of the gold finger, and the navigation camera is used for auxiliary positioning of the position to be measured of the PCB board.
2. The device for measuring the thickness of a circuit board and the height difference of a gold finger with high precision according to claim 1 is characterized in that: The two fine-tuning lifting platforms are divided into an upper fine-tuning lifting platform and a lower fine-tuning lifting platform, the upper fine-tuning lifting platform is arranged at the upper side of the U-shaped plate, and the lower fine-tuning lifting platform is arranged at the lower side of the U-shaped plate, and the two spectral confocal laser displacement sensors are divided into an upper spectral confocal laser displacement sensor and a lower spectral confocal laser displacement sensor, the upper spectral confocal laser displacement sensor is arranged at the upper fine-tuning lifting platform, and the lower spectral confocal laser displacement sensor is arranged at the lower fine-tuning lifting platform; wherein, the upper fine-tuning lifting platform is used to adjust the height of the upper spectral confocal laser displacement sensor on the upper side of the U-shaped plate, and the lower fine-tuning lifting platform is used to adjust the height of the lower spectral confocal laser displacement sensor on the lower side of the U-shaped plate.
3. The device for measuring the thickness of a circuit board and the height difference of a gold finger with high precision according to claim 2 is characterized in that: The workbench is arranged at the opening of the U-shaped plate and is located between the upper fine-tuning lifting platform and the lower fine-tuning lifting platform. The workbench is provided with a detection hole for allowing the laser beams emitted by the two spectral confocal laser displacement sensors to pass through. The laser beams emitted by the upper spectral confocal laser displacement sensor and the laser beams emitted by the lower spectral confocal laser displacement sensor are directed toward each other and are located on the same straight line.
4. The device for measuring the thickness of a circuit board and the height difference of a gold finger with high precision according to claim 2 is characterized in that: The upper fine-tuning lifting platform and the lower fine-tuning lifting platform both include a fixed seat, a lifting seat, a slide rail and a slider, the fixed seat is fixed on the U-shaped plate, the slide rail is arranged on the fixed seat, the slider is slidably arranged on the slide rail, the lifting seat is fixed on the slider, the upper spectral confocal laser displacement sensor is arranged on the lifting seat of the upper fine-tuning lifting platform, and the lower spectral confocal laser displacement sensor is arranged on the lifting seat of the lower fine-tuning lifting platform; wherein the lifting seat moves up and down by sliding the slider on the slide rail arranged on the fixed seat.
5. The device for measuring the thickness of a circuit board and the height difference of a gold finger with high precision according to claim 2, characterized in that: The U-shaped plate includes an upper horizontal plate, a side vertical plate and a lower horizontal plate which are integrally formed. The side vertical plate is arranged between the upper horizontal plate and the lower horizontal plate. The upper fine-tuning lifting platform and the navigation camera are both arranged on the upper horizontal plate. The lower fine-tuning lifting platform is arranged on the lower horizontal plate. The side vertical plate is fixed on the fixing device.
6. The device for measuring the thickness of a circuit board and the height difference of a gold finger with high precision according to claim 1, characterized in that: The workbench is provided with a telescopic plate for placing a keyboard.
7. The device for measuring the thickness of a circuit board and the height difference of a gold finger with high precision according to claim 1 is characterized in that: The outer side of the adjusting device is covered with a protective shell.