Flash tester for rapid focusing measurement

Abstract

The utility model relates to the technical field of measuring devices, in particular to a rapid focusing measurement flash tester, which comprises a base, a telecentric parallel light source component arranged on the base, a stand column arranged on the base, an upper bearing fixing seat arranged at the upper end of the stand column, a lower bearing fixing seat arranged at the lower end of the stand column, and a screw rod arranged between the upper bearing fixing seat and the lower bearing fixing seat. A glass objective table fixing seat is arranged over the telecentric parallel light source assembly, a glass objective table is arranged on the glass objective table fixing seat, a nut seat is arranged on the glass objective table fixing seat, the nut seat is in threaded fit with the lead screw through a threaded hole, a sliding block is arranged on the glass objective table fixing seat, and the sliding block is in threaded fit with the lead screw through a threaded hole. The sliding block is in sliding fit with a sliding rail arranged on the stand column, a grating reading head is arranged on the glass objective table fixing base and is in sliding fit with a grating ruler arranged on the stand column, a support is arranged on the stand column, a lens is arranged on the support, a surface light source assembly is arranged below the lens, and a camera is arranged above the lens.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a flash measuring instrument for rapid focusing measurement. Background Art

[0002] Flash tester is a device that uses optical imaging principles and computer processing technology to obtain the size and shape information of the object being measured by taking multiple sets of images and analyzing and processing them. The camera and light source are used to obtain the image of the object being measured. The light source is divided into a ring light source and a telecentric parallel light source component. The appropriate light source can be selected according to the different detection parts of the object being measured to obtain high-quality images. Through the calculation of the computer software module, the size result of the object being measured can be obtained instantly; it is widely used in the measurement of PCB boards. However, the existing flash tester has the following technical problems:

[0003] 1. The position of the workbench of the existing flash tester is fixed, and the lifting of the workbench cannot be freely adjusted, resulting in the inability to flash test the objects in the clearest state, resulting in extremely blurred images of the tested objects;

[0004] 2. Existing flash measurement instruments use ordinary bottom light sources, which causes inaccurate contour imaging, reduces the accuracy of flash measurement, and reduces the efficiency of flash measurement. Utility Model Content

[0005] The utility model provides a flash tester with fast focusing measurement, which can solve the problems of extremely fuzzy imaging of objects detected by existing flash testers, inaccurate contour imaging, low accuracy of flash measurement and low efficiency of flash measurement.

[0006] This application provides the following technical solutions:

[0007] A flash tester for fast focus measurement comprises a base, a telecentric parallel light source assembly is arranged on the base, a column is arranged on the base near the telecentric parallel light source assembly, an upper bearing fixing seat is arranged at the upper end of the column, a lower bearing fixing seat is arranged at the lower end of the column, a screw rod is arranged between the upper bearing fixing seat and the lower bearing fixing seat, the upper end of the screw rod is mounted on the upper bearing fixing seat through a bearing, the lower end of the screw rod is mounted on the lower bearing fixing seat through a bearing, the screw rod is connected to a servo motor, the servo motor is fixedly mounted on the upper bearing fixing seat, a glass stage fixing seat is arranged directly above the telecentric parallel light source assembly, and the A glass stage is provided on the glass stage fixing seat, a nut seat is provided on the glass stage fixing seat, a threaded hole is provided on the nut seat, the nut seat cooperates with the screw thread through the threaded hole, a slider is provided on the glass stage fixing seat, the slider slidably cooperates with the slide rail provided on the column, a grating reading head is provided on the glass stage fixing seat, the grating reading head slidably cooperates with the grating scale arranged on the column, a bracket is provided on the column, the bracket is located above the glass stage fixing seat, a lens is provided on the bracket, a surface light source assembly is provided below the lens, and a camera is provided above the lens.

[0008] Technical principles and beneficial effects: The glass stage fixing base is driven up and down by the lead screw controlled by the servo motor, which can realize the precise movement of the glass stage, thereby realizing fast focusing. At the same time, the grating reading head moves synchronously with the glass stage fixing base, reads the moving distance of the glass stage in real time, and obtains the precise focusing position of the glass stage. When performing batch testing, the glass stage can be quickly moved to the precise focusing position, thereby improving the focusing accuracy and the testing efficiency. Even if the thickness of the object to be tested (PCB board) changes, it can automatically focus to a clear position quickly and accurately, and the PCB board can be measured quickly and accurately. The telecentric parallel light source assembly can provide telecentric parallel light with backlight illumination for the object to be tested, which can highlight the edge features of the object to be tested, obtain a clear edge image of the object to be tested, and improve the detection accuracy. The flash tester with fast focus measurement has a compact structure, saves space, is simple to operate, and is easy to maintain.

[0009] Furthermore, an installation groove is provided on the upper end surface of the glass stage fixing seat, and the glass stage is installed in the installation groove.

[0010] Beneficial effects: The mounting groove provides precise positioning points for the glass stage, which facilitates loading and unloading, and helps improve work efficiency and operational convenience.

[0011] Furthermore, the four corners of the glass stage fixing seat are threadedly connected with adjusting bolts, and the adjusting bolts are used to adjust the tilt angle of the glass stage.

[0012] Beneficial effect: The tilt angle of the glass stage is adjusted by adjusting the bolts to ensure that the glass stage is perpendicular to the lens and parallel to the telecentric parallel light source assembly, thereby ensuring the detection accuracy of the object to be tested.

[0013] Furthermore, a clearance groove is provided on one side of the glass stage fixing seat opposite to the column, a nut seat is provided in the clearance groove, and two sliding blocks are symmetrically provided on both sides of the notch of the clearance groove.

[0014] Beneficial effects: The clearance groove effectively avoids interference and friction during mechanical movement, while saving space and optimizing the overall mechanical layout.

[0015] Furthermore, the screw rod is connected to the driving shaft of the servo motor through a coupling.

[0016] Beneficial effects: The coupling can improve the transmission efficiency and reliability between the servo motor and the lead screw, while reducing maintenance difficulty and extending component life.

[0017] Furthermore, the grating reading head is mounted on the glass stage fixing seat via a fixing block.

[0018] Beneficial effect: The fixing block can simplify the installation process and facilitate quick positioning and fixing.

[0019] Furthermore, the grating ruler adopts a metal patch grating ruler, the front side of the grating ruler is provided with grating lines, and the back side of the grating ruler is provided with adhesive.

[0020] Beneficial effects: The metal patch grating scale has higher durability and wear resistance, and the adhesive on the grating scale can be quickly adhered to the appropriate position, which improves the assembly efficiency of the equipment.

[0021] Furthermore, limit blocks are provided at both the upper and lower ends of the slide rail of the column.

[0022] Beneficial effect: The limit block is used to limit the upper and lower positions of the glass stage fixing seat, so as to avoid collision between the glass stage fixing seat and the telecentric parallel light source assembly and the surface light source assembly, thereby ensuring the service life of each component.

[0023] Furthermore, two brackets are provided on the column.

[0024] Beneficial effects: Two brackets can provide more stable support, and different components can be installed as needed, providing more configuration options and flexibility.

[0025] Furthermore, the front side of the column is opposite to the telecentric parallel light source, and the back side of the column is provided with two mutually parallel supporting columns.

[0026] Beneficial effects: The two mutually parallel support columns enhance the stability and durability of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an isometric view of a first embodiment of a flash tester for rapid focus measurement of the utility model;

[0028] Figure 2 It is a left view of the first embodiment of a flash tester for rapid focus measurement of the utility model;

[0029] Figure 3 It is a front view of a flash tester for rapid focus measurement according to the utility model;

[0030] Figure 4 for Figure 3 AA-directed view. DETAILED DESCRIPTION

[0031] The following is further described in detail through specific implementation methods:

[0032] The marks in the drawings of the specification include: base 1, telecentric parallel light source assembly 2, column 3, upper bearing fixing seat 4, lower bearing fixing seat 5, screw 6, servo motor 7, glass stage fixing seat 8, glass stage 9, adjusting bolt 10, nut seat 11, slider 12, slide rail 13, limit block 14, grating reading head 15, fixing block 16, grating scale 17, bracket 18, lens 19, surface light source assembly 20, camera 21.

[0033] Embodiment 1

[0034] like Figures 1 to 4As shown, a flash tester for fast focus measurement includes a base 1, a telecentric parallel light source assembly 2 is provided on the base 1, the telecentric parallel light source assembly 2 is connected to the base 1 by bolts, a column 3 is provided on the base 1 near the telecentric parallel light source assembly 2, the column 3 is fixed to the base 1 by bolts, the front of the column 3 is opposite to the telecentric parallel light source, and two mutually parallel support columns are provided on the back of the column 3, the support columns are fixedly connected to the column 3 and the base 1 by screws, an upper bearing fixing seat 4 is provided at the upper end of the front of the column 3, a lower bearing fixing seat 5 is provided at the lower end of the front of the column 3, the upper bearing fixing seat 4 and the lower bearing fixing seat 5 are both fixedly installed on the column 3 by bolts, a screw rod 6 is provided between the upper bearing fixing seat 4 and the lower bearing fixing seat 5, and the upper end of the screw rod 6 is fixed by a bearing It is installed on the upper bearing fixing seat 4, and the lower end of the screw rod 6 is installed on the lower bearing fixing seat 5 through a bearing. The screw rod 6 is connected to the driving shaft of the servo motor 7 through a coupling, and the servo motor 7 is fixed on the upper bearing fixing seat 4 by bolts. A glass stage fixing seat 8 is arranged directly above the telecentric parallel light source assembly 2, and a glass stage 9 is arranged on the glass stage fixing seat 8. Specifically, an installation groove is provided on the upper end surface of the glass stage fixing seat 8, and the glass stage 9 is installed in the installation groove. The four corners of the glass stage fixing seat 8 are threadedly connected with adjusting bolts 10, and the adjusting bolts 10 are threadedly matched with the threaded holes at the four corners of the glass stage fixing seat 8 to provide support for the glass stage 9 in the installation groove. The adjusting bolts 10 are used to adjust the inclination angle of the glass stage 9. A clearance groove is provided on the side of the glass stage fixing seat 8 opposite to the column 3, and a nut seat 11 is fixedly installed in the clearance groove by bolts. A threaded hole is provided on the nut seat 11, and the nut seat 11 is threadedly matched with the screw rod 6 through the threaded hole. Two sliders 12 are symmetrically installed on both sides of the notch of the clearance groove on the glass stage fixing seat 8 by bolts. The nut seat 11 is located between the two sliders 12. The two sliders 12 are respectively slidably matched with two slide rails 13 symmetrically provided on both sides of the front side of the column 3. The slide rail 13 extends in the vertical direction and is fixedly installed on the column 3 by bolts. Limit blocks 14 are provided on the upper and lower ends of the column 3 near the slide rail 13. The limit blocks 14 are used to limit the glass stage fixing seat 8. A grating reading head 15 is provided on the glass stage fixing seat 8, and the grating reading head 15 is installed on the glass stage fixing seat 8 through a fixing block 16. The fixing block 16 is fixedly connected to the glass stage fixing seat 8 and the grating reading head 15 through bolts; the grating reading head 15 is slidably matched with a grating scale 17 set on the column 3, and the grating scale 17 adopts a metal patch grating scale, and the front side of the grating scale 17 is provided with grating lines, and the back side of the grating scale 17 is provided with adhesive, and the grating scale 17 is fixed to the column 3 by adhesive bonding.A bracket 18 is fixedly mounted on the column 3 by bolts. The bracket 18 is located directly above the glass stage fixing seat 8. A lens 19 is arranged on the bracket 18. A clearance hole for the screw rod 6 to pass through is arranged on the bracket 18. A surface light source assembly 20 is installed below the lens 19 by bolts. A CCD camera 21 is installed above the lens 19 by bolts. The lens 19 and the CCD camera 21 are connected by a C-type interface data cable. The lens 19 is perpendicular to the glass stage 9 and the telecentric parallel light source assembly 2, thereby ensuring that the optical axis of the CCD camera 21 is perpendicular to the glass stage 9. The telecentric parallel light source assembly 2, the servo motor 7, the grating reading head 15, the lens 19, the surface light source assembly 20, and the CCD camera 21 can be connected to a control system to achieve automatic control.

[0035] The method of use is as follows: place the object to be tested on the glass stage 9, adjust the inclination angle of the glass stage 9 by adjusting the bolt 10, so that the glass stage 9 is parallel to the telecentric parallel light source assembly 2 and perpendicular to the lens 19, and drive the servo motor 7 to drive the screw 6 to rotate, so that the nut seat 11 on the screw 6 drives the glass stage fixing seat 8 to move up and down along the slide rail 13 on the column 3, so that the object to be tested moves up and down along the glass stage 9, so as to achieve accurate focusing of the object to be tested to the position with the clearest imaging, find the best shooting height, and obtain a clear image of the object to be tested; at the same time, the grating reading head 15 on the glass stage fixing seat 8 reads the reading of the grating ruler 17, and records the moving distance of the object to be tested in real time, so as to obtain the precise focusing displacement of the object to be tested. When performing batch testing, the object to be tested can be quickly moved to the precise focusing position, thereby improving the testing efficiency.

[0036] Embodiment 2

[0037] The difference between this embodiment and the first embodiment is that two brackets 18 are provided on the column 3, and the two brackets 18 are arranged in an upper and lower arrangement. Each bracket 18 includes a first bracket fixedly connected to the column 3 by bolts or welding. The first bracket and the second bracket are connected by bolts to form a space for installing a lens. The lens 19 and the surface light source assembly 20 can be fixed to the bracket 18 by bolts or clamping. Both brackets 18 can be used to install the lens 19, and the surface light source assembly 20 can be installed on the lower end surface of the lens 19 by bolts; the surface light source assembly 20 can also be installed on the bracket 18 located below by bolts, so that the surface light source assembly 20 is located between the lens 19 and the glass stage 9.

[0038] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A flash tester for fast focus measurement, characterized in that: The invention comprises a base, on which a telecentric parallel light source assembly is arranged, a column is arranged on the base near the telecentric parallel light source assembly, an upper bearing fixing seat is arranged at the upper end of the column, a lower bearing fixing seat is arranged at the lower end of the column, a screw rod is arranged between the upper bearing fixing seat and the lower bearing fixing seat, the upper end of the screw rod is mounted on the upper bearing fixing seat through a bearing, the lower end of the screw rod is mounted on the lower bearing fixing seat through a bearing, the screw rod is connected to a servo motor, and the servo motor is fixedly mounted on the upper bearing fixing seat, a glass stage fixing seat is arranged directly above the telecentric parallel light source assembly, and the glass stage A glass stage is provided on the fixing seat, a nut seat is provided on the glass stage fixing seat, a threaded hole is provided on the nut seat, the nut seat cooperates with the screw thread through the threaded hole, a slider is provided on the glass stage fixing seat, the slider slidably cooperates with the slide rail provided on the column, a grating reading head is provided on the glass stage fixing seat, the grating reading head slidably cooperates with the grating scale arranged on the column, a bracket is provided on the column, the bracket is located above the glass stage fixing seat, a lens is provided on the bracket, a surface light source assembly is provided below the lens, and a camera is provided above the lens.

2. A flash tester for rapid focus measurement according to claim 1, characterized in that: The upper end surface of the glass stage fixing seat is provided with a mounting groove, and the glass stage is installed in the mounting groove.

3. A flash tester for rapid focus measurement according to claim 2, characterized in that: The four corners of the glass stage fixing seat are threadedly connected with adjusting bolts, and the adjusting bolts are used to adjust the tilt angle of the glass stage.

4. The flash tester for rapid focus measurement according to claim 1, characterized in that: A clearance groove is arranged on one side of the glass stage fixing seat opposite to the column, a nut seat is arranged in the clearance groove, and two sliding blocks are symmetrically arranged on both sides of the notch of the clearance groove.

5. The flash tester for rapid focus measurement according to claim 1, characterized in that: The screw rod is connected to the driving shaft of the servo motor through a coupling.

6. The flash tester for rapid focus measurement according to claim 1, characterized in that: The grating reading head is mounted on the glass stage fixing seat through a fixing block.

7. The flash tester for rapid focus measurement according to claim 1, characterized in that: The grating ruler adopts a metal patch grating ruler, the front side of the grating ruler is provided with grating lines, and the back side of the grating ruler is provided with adhesive.

8. The flash tester for rapid focus measurement according to claim 1, characterized in that: Limit blocks are arranged at both the upper and lower ends of the slide rail of the column.

9. The flash tester for rapid focus measurement according to claim 1, characterized in that: Two brackets are arranged on the column.

10. The flash tester for rapid focus measurement according to claim 1, characterized in that: The front side of the column is opposite to the telecentric parallel light source, and the back side of the column is provided with two mutually parallel supporting columns.

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