CN107270823B - Steel mesh thickness detection equipment and detection method - Google Patents
Steel mesh thickness detection equipment and detection method Download PDFInfo
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- CN107270823B CN107270823B CN201710628606.3A CN201710628606A CN107270823B CN 107270823 B CN107270823 B CN 107270823B CN 201710628606 A CN201710628606 A CN 201710628606A CN 107270823 B CN107270823 B CN 107270823B
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- steel mesh
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
Abstract
The invention is suitable for the technical field of steel mesh thickness detection, and discloses steel mesh thickness detection equipment and a steel mesh thickness detection method. The steel mesh thickness detection equipment comprises a frame, a main imaging device and a 3D imaging device, wherein the main imaging device and the 3D imaging device are connected to the frame and face the steel mesh, the main imaging device and the 3D imaging device are arranged at an included angle of more than 0 degrees and less than 90 degrees, the frame is connected with a main light source, meshes used for irradiating the steel mesh are arranged below the frame so as to enable irradiation light rays to be refracted to the bottom light source of the 3D imaging device, and the 3D imaging device or/and the main imaging device are connected with or provided with an image recognition analysis module. The detection method adopts the steel mesh thickness detection equipment. According to the steel mesh thickness detection equipment and the steel mesh thickness detection method, the thickness of the steel mesh can be accurately detected in a non-contact mode, the change of the thickness of the steel mesh can be mastered in time, and the stability of the quality of produced products is guaranteed.
Description
Technical Field
The invention belongs to the technical field of steel mesh thickness detection, and particularly relates to steel mesh thickness detection equipment and a steel mesh thickness detection method.
Background
The steel mesh is widely applied to an SMT production line and has the main function of helping the printing of solder paste; the purpose is to transfer the exact amount of solder paste to the exact location on the empty PCB, so the thickness of the steel mesh determines the height of the solder paste on the PCB. In the prior art, the steel mesh on the production line can only measure the steel mesh residual materials through a conventional measuring tool (such as a caliper) to determine the thickness of the steel mesh; and the finished steel mesh is inconvenient to measure by using a conventional measuring tool; or a step steel mesh with a plurality of thicknesses is arranged on one steel mesh, so that the requirements of different solder paste thicknesses of different devices are met, and the prior measuring technology can not meet the production requirements at all. After the steel mesh on the production line is used for a period of time, the thickness of the steel mesh can be reduced due to printing tension and pressure; and the thickness of the steel net can be reduced after the steel net is used for a long time, so that the stability of the quality of produced products is affected, and the thickness change condition of the steel net needs to be known in time.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides steel mesh thickness detection equipment and a detection method, which can accurately detect the thickness of a steel mesh in a non-contact mode and are beneficial to ensuring the stability of the quality of produced products.
The technical scheme of the invention is as follows: the utility model provides a steel mesh thickness check out test set, includes frame, main image device and 3D image device, main image device with 3D image device all connect in the frame and towards in the steel mesh, just main image device with 3D image device is being more than 0 degrees and is being less than 90 degrees contained angle setting, the frame is connected with the main light source, the below of frame is provided with the mesh that is used for shining the steel mesh so that shines the light refraction to 3D image device's bottom light source, 3D image device or/and main image device is connected with or is provided with image recognition analysis module.
Specifically, the lens of the main imaging device is downward and perpendicular to the steel mesh, and the included angle between the main imaging device and the 3D imaging device is 30-60 degrees.
Specifically, the included angle between the main imaging device and the 3D imaging device is 45 degrees.
Specifically, an included angle between the optical axis of the bottom light source and the steel mesh is 45 degrees.
Specifically, the bottom light source comprises a plurality of light emitting devices which are arranged at intervals in a step mode, and optical axes of the light emitting devices are parallel.
Specifically, a planar lens or a condensing lens is provided in front of the light emitting device.
Specifically, the bottom light source comprises a base, the base is provided with a plurality of steps with an included angle of 45 degrees with the horizontal plane, and the light-emitting device is attached to the steps.
Specifically, the main imaging device is connected to the gantry via a mounting plate.
Specifically, the frame is connected with a distance adjusting device.
The embodiment of the invention also provides a steel mesh thickness detection method, which adopts the steel mesh thickness detection equipment and comprises the following steps:
placing a steel mesh below the main imaging device and the 3D imaging device and above the bottom light source;
the main imaging device images the steel mesh, light rays of the bottom light source irradiate to meshes of the steel mesh and are refracted to the 3D imaging device, and the 3D imaging device shoots pictures and analyzes the thickness of the steel mesh through the image recognition analysis module.
According to the steel mesh thickness detection equipment and the steel mesh thickness detection method, the thickness of the steel mesh can be accurately detected in a non-contact mode, the change of the thickness of the steel mesh can be mastered in time, and the stability of the quality of produced products is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of a steel mesh thickness detection device according to an embodiment of the present invention;
fig. 2 is a schematic plan view of a steel mesh thickness detecting device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of measurement calculation of a steel mesh thickness detection device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 and fig. 2, the steel mesh thickness detection device provided by the embodiment of the invention includes a frame 3, a main imaging device (main camera) 1 and a 3D imaging device (3D camera) 2, the main imaging device 1 and the 3D imaging device 2 are connected to the frame 3 and face the steel mesh 9, the main imaging device 1 and the 3D imaging device 2 are arranged at an included angle greater than 0 degree and less than 90 degrees, the frame 3 is connected with a main light source 4, a mesh for irradiating the steel mesh 9 is arranged below the frame 3 so as to enable the irradiated light to be refracted to a bottom light source 5 of the 3D imaging device 2, the 3D imaging device 2 or/and the main imaging device 1 are connected with or provided with an image recognition analysis module, the main imaging device 1 images the steel mesh 9, the light of the bottom light source 5 is irradiated to the mesh 91 of the steel mesh 9 and refracted to the 3D imaging device 2, the 3D imaging device 2 photographs and analyzes the thickness of the steel mesh 9 through the image recognition analysis module, thus the thickness of the steel mesh 9 can be accurately detected in a non-contact mode, the change of the thickness of the steel mesh 9 can be ensured, and the quality of a product can be mastered in time.
Alternatively, the lens of the main imaging device 1 is disposed downward and perpendicular to the steel mesh 9, and the included angle between the main imaging device 1 and the 3D imaging device 2 is 30 degrees to 60 degrees.
Optionally, the included angle between the main imaging device 1 and the 3D imaging device 2 is 45 degrees, which is beneficial to image analysis. The included angle between the main imaging device 1 and the 3D imaging device 2 may be other suitable values.
Specifically, the angle between the optical axis of the bottom light source 5 and the steel mesh 9 and the angle between the 3D imaging device 2 and the steel mesh 9 may be equal.
Specifically, the angle between the optical axis of the bottom light source 5 and the steel mesh 9 may be 45 degrees.
Specifically, the bottom light source 5 includes a plurality of light emitting devices 51 arranged at a stepwise interval, and the optical axes of the light emitting devices 51 are parallel, so that the frame of the steel mesh 9 with various thicknesses can be accommodated.
Specifically, a planar lens or condenser lens 52 (convex lens) is provided in front of the light emitting device 51 to improve imaging effect. The light emitting device 51 may be an LED or the like. The main light source 4 may be an LED light source or the like.
Specifically, the bottom light source 5 includes a base 53, the base 53 is provided with a plurality of steps forming an included angle of 45 degrees with the horizontal plane, and the light emitting device 51 is attached to the steps. The base 53 may be a metal piece and has a heat dissipation function in addition to a positioning function.
Specifically, the main imaging device 1 is connected to the gantry 3 through a mounting plate 11.
Specifically, the frame 3 is connected with a distance adjusting device, in this embodiment, the main imaging device 1 and the 3D imaging device 2 form an included angle of 45 ° and are used as a whole through a mechanical structure, and when the thickness of the frame of the steel mesh 9 is changed, the whole frame 3 can be adjusted to move up and down, so that the imaging quality of the steel mesh 9 is ensured.
The embodiment of the invention also provides a steel mesh thickness detection method, which adopts the steel mesh thickness detection equipment and comprises the following steps:
placing a steel mesh 9 below the main imaging device 1 and the 3D imaging device 2 and above the bottom light source 5;
the main imaging device 1 images the steel mesh 9, the main imaging device 1 can image the size of the mesh 91 of the steel mesh 9, the distance between the main imaging device 1, the 3D imaging device 2 and the steel mesh 9 can be calculated, the light of the bottom light source 5 irradiates the mesh 91 of the steel mesh 9 and refracts to the 3D imaging device 2, the 3D imaging device 2 shoots the pictures of the steel mesh 9 and the mesh 91, and the thickness of the steel mesh 9 is analyzed through the image recognition analysis module. Therefore, the thickness of the steel mesh 9 can be accurately detected in a non-contact mode, and the change of the thickness of the steel mesh 9 can be mastered in time, so that the stability of the quality of the produced products is guaranteed.
The measurement calculation principle can be referred to as follows: as shown in fig. 3: the thickness of the steel mesh in the oblique projection direction b=h×cos (a), b can be obtained by camera pixel analysis to obtain an accurate value, and the steel mesh thickness is calculated from a triangulation method at a calibrated angle a, h=b/cos (a).
The steel mesh thickness detection equipment and the steel mesh thickness detection method provided by the embodiment of the invention can accurately detect the thickness of the steel mesh in a non-contact mode, and are beneficial to ensuring the stability of the quality of produced products.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The utility model provides a steel mesh thickness check out test set, its characterized in that includes frame, main image device and 3D image device, main image device with 3D image device all connect in the frame and towards in the steel mesh, just main image device with 3D image device is being and is being greater than 0 degrees and being less than 90 degrees contained angle setting, the frame is connected with the main light source, the below of frame is provided with the mesh that is used for shining the steel mesh so that the illumination light refraction to 3D image device's bottom light source, 3D image device or/and main image device is connected with or is provided with image recognition analysis module.
2. The steel mesh thickness detection apparatus according to claim 1, wherein the lens of the main imaging device is disposed downward and perpendicular to the steel mesh, and an included angle between the main imaging device and the 3D imaging device is 30 degrees to 60 degrees.
3. A steel wire thickness detection apparatus according to claim 2, wherein the included angle between the main imaging device and the 3D imaging device is 45 degrees.
4. A steel mesh thickness detection apparatus according to claim 3, wherein an angle between an optical axis of said bottom light source and said steel mesh is 45 degrees.
5. A steel wire gauge apparatus according to claim 1, wherein said bottom light source comprises a plurality of light emitting devices arranged in a stepwise spaced arrangement, the optical axes of each of said light emitting devices being parallel.
6. A steel mesh thickness detection apparatus according to claim 5, wherein a planar lens or a condensing lens is provided in front of the light emitting device.
7. The steel mesh thickness detection apparatus according to claim 5, wherein the bottom light source comprises a base, the base is provided with a plurality of steps forming an angle of 45 degrees with the horizontal plane, and the light emitting device is attached to the steps.
8. A steel wire gauge inspection apparatus according to claim 1 wherein the primary imaging device is connected to the frame by a mounting plate.
9. A steel wire gauge inspection apparatus according to claim 1 wherein the frame is connected to a distance adjustment device.
10. A steel wire thickness detection method, characterized in that a steel wire thickness detection apparatus according to any one of claims 1 to 9 is employed, comprising the steps of:
placing a steel mesh below the main imaging device and the 3D imaging device and above the bottom light source;
the main imaging device images the steel mesh, light rays of the bottom light source irradiate to meshes of the steel mesh and are refracted to the 3D imaging device, and the 3D imaging device shoots pictures and analyzes the thickness of the steel mesh through the image recognition analysis module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710628606.3A CN107270823B (en) | 2017-07-28 | 2017-07-28 | Steel mesh thickness detection equipment and detection method |
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| CN201710628606.3A CN107270823B (en) | 2017-07-28 | 2017-07-28 | Steel mesh thickness detection equipment and detection method |
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| CN107270823A CN107270823A (en) | 2017-10-20 |
| CN107270823B true CN107270823B (en) | 2023-05-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019019131A1 (en) * | 2017-07-28 | 2019-01-31 | 深圳市兴华炜科技有限公司 | Steel mesh thickness measurement device and measurement method |
Citations (2)
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|---|---|---|---|---|
| JPH09283921A (en) * | 1996-04-17 | 1997-10-31 | Sony Corp | Printed board and method of measuring thickness of solder film on printed board |
| US6621089B1 (en) * | 1999-10-19 | 2003-09-16 | Nikon Corporation | Reticle-focus detector, and charged-particle-beam microlithography apparatus and methods comprising same |
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| US8315834B2 (en) * | 2003-12-17 | 2012-11-20 | Siemens Energy, Inc. | System and method for measuring coating thickness |
| CN2938734Y (en) * | 2006-08-14 | 2007-08-22 | 华南理工大学 | Image collection device for reference measuring and tin paste printing detection |
| CN100421453C (en) * | 2006-11-30 | 2008-09-24 | 华南理工大学 | L-shaped twin-lens image collecting device used for paste solder printing |
| JP4459264B2 (en) * | 2007-10-09 | 2010-04-28 | パナソニック株式会社 | Three-dimensional shape measurement method |
| CN202126246U (en) * | 2011-05-17 | 2012-01-25 | 东莞市神州视觉科技有限公司 | Fast three-dimensional measuring system for patch printing solder pastes |
| CN102706302B (en) * | 2011-07-04 | 2014-12-10 | 东莞市卓安精机自动化设备有限公司 | Automatic detecting device for printing steel mesh |
| CN202255299U (en) * | 2011-08-30 | 2012-05-30 | 东莞市盟拓光电科技有限公司 | Solder paste thickness testing device |
| CN202304768U (en) * | 2011-10-21 | 2012-07-04 | 深圳市慧耕科技有限公司 | Three-dimension measurement module and measurement instrument |
| JP5775439B2 (en) * | 2011-12-06 | 2015-09-09 | 新電子株式会社 | Screen printing plate making inspection equipment |
| CN103217112A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Single-point thickness measurement method of SMT screen plate |
| CN103389044A (en) * | 2013-08-09 | 2013-11-13 | 昆山允可精密工业技术有限公司 | Manual single-measure-head contact-type measuring method for veneer board thickness |
| CN207007107U (en) * | 2017-07-28 | 2018-02-13 | 深圳市兴华炜科技有限公司 | A kind of steel mesh thickness detecting equipment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09283921A (en) * | 1996-04-17 | 1997-10-31 | Sony Corp | Printed board and method of measuring thickness of solder film on printed board |
| US6621089B1 (en) * | 1999-10-19 | 2003-09-16 | Nikon Corporation | Reticle-focus detector, and charged-particle-beam microlithography apparatus and methods comprising same |
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