CN107339952B - Three-dimensional measuring device for projection in three directions of high and low groups - Google Patents
Three-dimensional measuring device for projection in three directions of high and low groups Download PDFInfo
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- CN107339952B CN107339952B CN201710627797.1A CN201710627797A CN107339952B CN 107339952 B CN107339952 B CN 107339952B CN 201710627797 A CN201710627797 A CN 201710627797A CN 107339952 B CN107339952 B CN 107339952B
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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
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2433—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring outlines by shadow casting
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a three-dimensional measuring device for projection in each three directions of a high group and a low group, which relates to the field of detection of circuit boards and comprises an image capturing device, a first mounting block and a second mounting block which are sequentially arranged from top to bottom; three groups of first grating projection devices are respectively arranged on three side surfaces of the first installation block, and the projection light of each group of first grating projection devices is equal to an included angle beta 1 between the central axis of the camera; three groups of second grating projection devices are respectively arranged on three sides of the second installation block, and the projection light of each group of second grating projection devices is equal to an included angle beta 2 between the central axis of the camera; the included angle beta 1 is smaller than the included angle beta 2; the first grating projection device and the second grating projection device are arranged in a staggered mode. The device can realize nondestructive optical measurement of the object to be measured with the height of up to 10mm, effectively reduces the influence of shadows generated by the light projection of the object to be measured on the detection precision, and has the advantages of strong universality and high measurement precision.
Description
Technical Field
The invention relates to the field of detection of circuit boards, in particular to a three-dimensional measuring device for projection in three directions of a high-low group.
Background
Aiming at the detection of the heights of printed solder paste and components mounted on the surface in the electronic manufacturing process of a circuit board, no-damage optical measurement technology exists at present, namely a programmable structure grating (PSLM) technology is adopted to form a full-spectrum structure grating combined with a phase profile modulation measurement technology (PMP), an XYZ operation platform is combined, motion control, detection head light source (2D and 3D) control, image acquisition, data input and output are carried out by self-programming control software through computer and PLC control, the height and the area of a measured object are calculated through decomposition and synthesis, and three-dimensional parameters of the measured object are calculated through the area and the height, so that the three-dimensional measurement of the printed solder paste and the components is realized.
At present, the measuring device with unidirectional projection is mainly used in the market, the unidirectional projection light generates shadows on the back of the measured object relative to the light, the shadow area is larger as the height of the measured object is higher, and the measuring error is larger, so that the measuring device with unidirectional projection has the defect that the measuring device with unidirectional projection has overlarge error and even can not finish the measurement under the condition that the height of the measured object is relatively higher.
Aiming at the technical problems, the inventor develops a three-dimensional measuring device for projection in each three directions of a high-low group, which overcomes the technical problems through intensive research, and the scheme is generated.
Disclosure of Invention
In order to solve the technical problems, the invention provides a three-dimensional measuring device for projection in each three directions of a high-low group so as to realize accurate detection of various objects to be measured with different heights, reduce measuring errors and improve measuring accuracy.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the three-dimensional measuring device comprises an image capturing device, a first mounting block and a second mounting block which are sequentially arranged from top to bottom, wherein the first mounting block and the second mounting block are respectively fixedly connected with the image capturing device; the image capturing device comprises a T-shaped mounting seat, a placing block arranged on the T-shaped mounting seat and a camera which is arranged on the placing block and has a downward lens; the upper and lower openings of the first mounting block consist of seven side surfaces, and the cross section area of the first mounting block is gradually reduced from top to bottom; the upper and lower openings of the second mounting block consist of seven side surfaces, and the cross section area of the second mounting block is gradually reduced from top to bottom; three groups of first grating projection devices are respectively arranged on three side surfaces of the first installation block, and the projection light of each group of first grating projection devices is equal to an included angle beta 1 between the central axis of the camera; three groups of second grating projection devices are respectively arranged on three sides of the second installation block, and the projection light of each group of second grating projection devices is equal to an included angle beta 2 between the central axis of the camera; the included angle beta 1 is smaller than the included angle beta 2; the first grating projection device and the second grating projection device are arranged in a staggered mode.
Preferably, the projection light rays of each group of first grating projection devices are parallel to the corresponding side surfaces of the first mounting blocks; the projection light rays of each group of second grating projection devices are parallel to the corresponding side surfaces of the second installation blocks.
Preferably, the three groups of first grating projection devices are installed at the same height; and the mounting heights of the three groups of second grating projection devices are consistent.
The beneficial effects of the invention are as follows: according to the invention, three groups of grating projection devices are designed, so that a measured object is covered by two groups of projection light rays in three different directions, six grating images are respectively collected by a camera, the collected pictures are decomposed and synthesized by a computer, and the height, the area and the three-dimensional parameters of the measured object are calculated by combining a phase profile modulation measurement technology (PMP), so that the measured object is accurately measured; meanwhile, the first grating projection device 21 projects grating images which are in three directions and have the same included angle beta 1 with the central axis of the camera, and likewise, the second grating projection device 31 projects grating images which are in three directions and have the same included angle beta 2 with the central axis of the camera, and the included angle beta 1 is smaller than the included angle beta 2, so that two groups of parameters exist when the height operation is performed by adopting the phase profile modulation measurement technology (PMP), and the measurement precision is effectively improved. The invention effectively reduces the influence of shadows generated by the projection of the light rays on the detection precision, is suitable for three-dimensional measurement of various objects to be measured with different heights, and has the advantages of strong universality and high measurement precision.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a top view of the present invention.
FIG. 3 is a cross-sectional view of the invention A-A.
FIG. 4 is a cross-sectional view of the invention B-B.
FIG. 5 is a schematic diagram of a raster image operation according to the present invention.
Detailed Description
As shown in fig. 1-5, the invention discloses a three-dimensional measuring device for projection in each three directions of a high-low group, which comprises an image capturing device 1, a first mounting block 2 and a second mounting block 3 which are sequentially arranged from top to bottom, wherein the first mounting block 2 and the second mounting block 3 are respectively fixedly connected with the image capturing device 1; the image capturing device 1 comprises a T-shaped mounting seat 11, a placing block 12 arranged on the T-shaped mounting seat 11, and a camera 13 which is arranged on the placing block 12 and has a downward lens; the upper and lower openings of the first mounting block 2 are formed by seven side surfaces, and the cross section area of the first mounting block is gradually reduced from top to bottom; the upper and lower openings of the second mounting block 3 are formed by seven side surfaces, and the cross section area of the second mounting block is gradually reduced from top to bottom; three groups of first grating projection devices 21 are respectively arranged on three side surfaces of the first installation block 2, and the included angle beta 1 between the projection light 211 of each group of first grating projection devices 21 and the central axis 131 of the camera 13 is equal; three groups of second grating projection devices 31 are respectively arranged on three side surfaces of the second installation block 3, and the included angle beta 2 between the projection light 311 of each group of second grating projection devices 31 and the central axis 131 of the camera 13 is equal; the included angle beta 1 is smaller than the included angle beta 2; the first grating projection device 21 and the second grating projection device 31 are staggered.
Further, the projection light rays 211 of each group of the first grating projection devices 21 are parallel to the corresponding side surfaces of the first mounting blocks 2; the projection light 311 of each set of the second grating projection device 31 is parallel to the corresponding side of the second mounting block.
Further, the mounting heights of the three groups of the first grating projection devices 21 are consistent; the three sets of the second grating projection devices 31 are installed to be uniform in height.
The first grating projection device 21 and the second grating projection device 31 respectively comprise an electronic circuit, an optical engine and an LED lamp, wherein the electronic circuit generates a programmable structure grating (PSLM), the LED lamp is used as a light source to project the grating through the optical engine, so that each first grating projection device 21 and each second grating projection device 31 can project grating images with different phases and different colors on a measured object, the grating images are respectively collected by the camera 13, the collected images are decomposed and synthesized by a computer, and the height, the area and the three-dimensional parameters of the measured object are calculated by combining a phase profile modulation measurement technology (PMP), thereby realizing the detection of the measured object.
In one embodiment, taking the included angle β1 as 12.5 ° and the included angle β2 as 14 °, the first grating projection device 21 projects grating images with three directions and equal included angle β1 to the central axis 131 of the camera 13, and similarly, the second grating projection device 31 projects grating images with three directions and equal included angle β2 to the central axis 131 of the camera 13, so that when the phase profile modulation measurement technique (PMP) is adopted to perform the height operation, two sets of parameters of α angle are provided, as shown in fig. 5, according to h=d·tan (α), two sets of data of height H can be obtained, thereby effectively improving the measurement accuracy. The device can realize nondestructive optical measurement of the object to be measured with the height of up to 10mm, effectively reduces the influence of shadows generated by the light projection of the object to be measured on the detection precision, and has the advantages of strong universality and high measurement precision.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (3)
1. The utility model provides a three-dimensional measuring device of three directional projection of two sets of each directions in height, its characterized in that: the device comprises an image capturing device, a first mounting block and a second mounting block which are sequentially arranged from top to bottom, wherein the first mounting block and the second mounting block are respectively fixedly connected with the image capturing device; the image capturing device comprises a T-shaped mounting seat, a placing block arranged on the T-shaped mounting seat and a camera which is arranged on the placing block and has a downward lens; the upper and lower openings of the first mounting block consist of seven side surfaces, and the cross section area of the first mounting block is gradually reduced from top to bottom; the upper and lower openings of the second mounting block consist of seven side surfaces, and the cross section area of the second mounting block is gradually reduced from top to bottom; three groups of first grating projection devices are respectively arranged on three side surfaces of the first installation block, and the projection light of each group of first grating projection devices is equal to an included angle beta 1 between the central axis of the camera; three groups of second grating projection devices are respectively arranged on three sides of the second installation block, and the projection light of each group of second grating projection devices is equal to an included angle beta 2 between the central axis of the camera; the included angle beta 1 is smaller than the included angle beta 2; the first grating projection device and the second grating projection device are arranged in a staggered mode, each of the first grating projection device and the second grating projection device comprises an electronic circuit, an optical engine and an LED lamp, the electronic circuit generates a grating with a programmable structure, the LED lamp is used as a light source, and the LED lamp is used for projecting the grating through the optical engine.
2. The three-dimensional measuring device for projection in each of the three directions of the high and low sets according to claim 1, wherein: the projection light rays of each group of first grating projection devices are parallel to the corresponding side surfaces of the first installation blocks; the projection light rays of each group of second grating projection devices are parallel to the corresponding side surfaces of the second installation blocks.
3. A three-dimensional measuring device for three-dimensional projection of a high and low group according to claim 1 or 2, wherein: the mounting heights of the three groups of first grating projection devices are consistent; and the mounting heights of the three groups of second grating projection devices are consistent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710627797.1A CN107339952B (en) | 2017-07-28 | 2017-07-28 | Three-dimensional measuring device for projection in three directions of high and low groups |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710627797.1A CN107339952B (en) | 2017-07-28 | 2017-07-28 | Three-dimensional measuring device for projection in three directions of high and low groups |
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| CN107339952A CN107339952A (en) | 2017-11-10 |
| CN107339952B true CN107339952B (en) | 2023-07-28 |
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| CN201710627797.1A Active CN107339952B (en) | 2017-07-28 | 2017-07-28 | Three-dimensional measuring device for projection in three directions of high and low groups |
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| CN109531226A (en) * | 2019-01-09 | 2019-03-29 | 苏州北斗星智能科技有限公司 | A kind of compressor cutting centralized positioning detection device |
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| CN101246228A (en) * | 2008-02-01 | 2008-08-20 | 黑龙江科技学院 | Phase shift optical grating in three-dimensional measuring system |
| CN101900534A (en) * | 2009-05-27 | 2010-12-01 | 株式会社高永科技 | 3-d shape measurement equipment and method for measuring three-dimensional shape |
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| JP4149853B2 (en) * | 2003-06-02 | 2008-09-17 | 株式会社山武 | 3D measuring apparatus and 3D measuring method |
| JP2013174577A (en) * | 2011-09-05 | 2013-09-05 | Toyota Central R&D Labs Inc | Surface shape measuring device |
| JP2013124938A (en) * | 2011-12-15 | 2013-06-24 | Ckd Corp | Three-dimensional measuring device |
| JP2014106143A (en) * | 2012-11-28 | 2014-06-09 | Toyota Central R&D Labs Inc | Surface shape measurement device and method |
| CN203132511U (en) * | 2013-04-01 | 2013-08-14 | 廖怀宝 | Measuring device applied for two-dimensional and three-dimensional contour identification methods of object |
| CN203443556U (en) * | 2013-09-18 | 2014-02-19 | 廖怀宝 | Device capable of realizing two dimensional measurement and three dimensional measurement of object |
| CN204043632U (en) * | 2014-08-29 | 2014-12-24 | 西安新拓三维光测科技有限公司 | A kind of structure based light multiple plate three-dimensional measurement instrument apparatus |
| CN206989909U (en) * | 2017-07-28 | 2018-02-09 | 厦门思泰克智能科技股份有限公司 | A kind of three-dimensional measuring apparatus of each three direction projection of two groups of height |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101246228A (en) * | 2008-02-01 | 2008-08-20 | 黑龙江科技学院 | Phase shift optical grating in three-dimensional measuring system |
| CN101900534A (en) * | 2009-05-27 | 2010-12-01 | 株式会社高永科技 | 3-d shape measurement equipment and method for measuring three-dimensional shape |
| CN103047944A (en) * | 2013-01-22 | 2013-04-17 | 廖怀宝 | Three-dimensional object measuring method and device |
| CN206095172U (en) * | 2016-10-26 | 2017-04-12 | 厦门思泰克智能科技股份有限公司 | Variable three how projected maintenance of grating space survey device |
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