WO2022083084A1 - Instrument de mesure universel d'éclair - Google Patents

Instrument de mesure universel d'éclair Download PDF

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Publication number
WO2022083084A1
WO2022083084A1 PCT/CN2021/088573 CN2021088573W WO2022083084A1 WO 2022083084 A1 WO2022083084 A1 WO 2022083084A1 CN 2021088573 W CN2021088573 W CN 2021088573W WO 2022083084 A1 WO2022083084 A1 WO 2022083084A1
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WO
WIPO (PCT)
Prior art keywords
light source
lens
illumination light
universal flash
view
Prior art date
Application number
PCT/CN2021/088573
Other languages
English (en)
Chinese (zh)
Inventor
李世昌
陈欢
胡春桃
帅成忠
章则华
Original Assignee
杭州魔方智能科技有限公司
浙江省计量科学研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 杭州魔方智能科技有限公司, 浙江省计量科学研究院 filed Critical 杭州魔方智能科技有限公司
Publication of WO2022083084A1 publication Critical patent/WO2022083084A1/fr

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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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/36—Microscopes arranged for photographic purposes or projection purposes or digital imaging or video purposes including associated control and data processing arrangements
    • G02B21/365—Control or image processing arrangements for digital or video microscopes
    • G02B21/367—Control or image processing arrangements for digital or video microscopes providing an output produced by processing a plurality of individual source images, e.g. image tiling, montage, composite images, depth sectioning, image comparison
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/24—Base structure
    • G02B21/26—Stages; Adjusting means therefor
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/22—Telecentric objectives or lens systems

Definitions

  • the invention relates to a flash tester, in particular to a general flash tester.
  • the flash tester is a telecentric lens with a large field of view and a large depth of field, which reduces the outline image of the product to dozens of times and then transmits it to a high-resolution camera for digital processing, and then captures the product by the background measurement software with powerful computing power.
  • a rapid measuring mechanism that can measure the contour and complete the calculation to measure the contour size of the product.
  • This measurement method has been widely used in various fields such as machinery, electronics, cables, clocks and watches due to its fast measurement speed and high degree of automation.
  • the resolution of the captured image will decrease in a small range, resulting in that each group of telecentric lenses has a corresponding measurement range.
  • the measurement range is generally only within 10-100mm, which cannot cover the entire measurement range.
  • the measurement range of the telecentric lens and its price are exponentially corresponding, that is, after the measurement range of the telecentric lens is increased, the price will also be several times or even dozens of times the original, making it impossible for manufacturers to A wide range of dimensional measurements can be achieved through direct sizing.
  • the current flash testers are generally highly integrated and compact in structure. As a result, manufacturers directly add lenses with different measurement ranges on the existing flash testers, which will result in an increase in the overall size of the flash tester and alienation of the shape. Not only is it difficult to carry and store, but the integrated lens is easy to be damaged by external collision due to its protruding position, which reduces the stability of the flash tester.
  • the flash tester needs to set the illumination light source at the top and bottom of the workpiece during measurement, and use the illumination to make the workpiece clearly display fine local features and complete sharp contour lines.
  • the bottom light source cannot fully illuminate the edge of the workpiece; Under the illumination of the top light source, it is easy to confuse the outline of the workpiece with other planes below, so that the flash tester cannot distinguish and complete the detection, which reduces the detection effect of the workpiece.
  • the existing flash tester has the problems of small measurement range, high production cost and poor measurement effect.
  • the purpose of the present invention is to provide a universal flash tester. It has the characteristics of large measurement range, low production cost and good measurement effect.
  • a universal flash tester including a lift-type main lens, a camera is connected to the outside of the main lens, a moving platform is arranged outside the field of view of the main lens, a micro-measuring component is installed on one side of the main lens, and the other side of the main lens is provided with a moving platform.
  • a measuring light source is connected to the side via the lifting assembly.
  • the main body lens is a dual-view lens
  • a large-view camera and a small-view camera are respectively connected to the outside of the dual-view lens
  • the large-view camera and the small-view camera are respectively vertically connected to the main lens at 90°.
  • the microscopic measurement component includes a lift-type zoom lens, and a loading platform is provided on the outer side of the zoom lens.
  • the lifting assembly includes a cylinder located on the side of the main lens away from the microscopic measurement assembly, and a lifting rod is slidably connected to the cylinder.
  • the shape of the lifting rod is a circular tube, and one side of the lifting rod is A driving part is connected, and a measuring light source is connected to the bottom of the lift rod.
  • the driving part is a screw motor or a linear slide.
  • the mobile platform includes an X-axis mobile platform, the X-axis mobile platform is connected with a Y-axis mobile platform through the first guide rail, the Y-axis mobile platform is externally connected with a first moving part, and the X-axis mobile platform and The first moving parts are arranged side by side in the horizontal direction; the X-axis moving platform is provided with a second guide rail, the second guide rail is arranged on the X-axis moving platform perpendicular to the first guide rail, and the outside of the second guide rail is provided with a second moving department.
  • the first moving part and the second moving part have the same structure, and both include a screw motor, and a screw slider is connected to the screw motor, and the screw slider of the first moving part is The block is connected to the Y-axis moving platform, and the lead screw slider of the second moving part is connected to the X-axis moving platform.
  • the screw motor is a linear screw motor.
  • the first guide rails are arranged side by side on the left and right sides of the X-axis moving platform, and the second guide rails are arranged side by side on the front and rear sides of the X-axis moving platform.
  • the first moving part is connected to the first guide rail on one side.
  • the first guide rail and the second guide rail are both cross-roller guide rails.
  • grating scales are provided at the lower ends of the first moving part and the second moving part.
  • the measurement light source includes a first illumination light source and a second illumination light source that are arranged side by side in the height direction, the illumination light of the first illumination light source is oblique light, and the illumination of the second illumination light source is oblique light.
  • the light is parallel light.
  • the first illumination light source and the second illumination light source are externally connected with a casing, and the first illumination light source and the second illumination light source are distributed on the inner wall of the casing in a ring shape.
  • the casing is provided with a cover plate located outside the second illumination light source, the edge of the cover plate extends to the end of the second illumination light source, and the first illumination light source is located on the cover plate in the horizontal direction. inside.
  • the first illumination light source is composed of a plurality of first illumination sub-areas
  • the second illumination light source is composed of a plurality of second illumination sub-areas.
  • the aforementioned universal flash tester also includes a backlight located on the side of the mobile platform away from the measurement light source, the backlight, the first lighting source and the second lighting source are respectively connected with a dimming controller, and the first lighting The partition and the second lighting partition are respectively connected with control modules.
  • a navigation camera is arranged above the mobile platform, and the field of view of the navigation camera extends to the outside of the field of view of the main lens.
  • the present invention has the following characteristics:
  • the present invention can measure workpieces of different sizes in three groups of measurement ranges through the cooperation of the main lens and the microscopic measurement assembly, and use the zoom lens to solve the problem of unclear detection of small-sized workpieces caused by the large depth of field of the dual-view lens. Therefore, the measuring range of the present invention is effectively expanded by 0.1-100mm;
  • the tubular lifting rod can stably limit the measuring light source in a vertical state, so that the measuring light source will not be tilted due to the offset of the center of gravity. Realize the support and drive lift of the measurement light source, thereby saving the space occupied by the other side of the main lens, so that the microscopic measurement components and the lifting components can be arranged side by side on the left and right sides of the main lens, and will not exceed the whole of the flash tester.
  • the frame effectively improves the stability of the present invention and reduces its structural size;
  • the present invention can illuminate the workpiece from the top through the inclined light formed by the first illumination light source, thereby improving the clarity of the surface of the workpiece; when the edge contour of the workpiece is blocked, the second illumination light source can be moved up and down to It is flush with the contour surface of the workpiece, so as to use the scattering of parallel light on the contour surface of the workpiece to distinguish the contour surface from other planes of the workpiece, so that the vertical contour surface can form a clear contour line in the field of view of the lens. It is convenient for the flash tester to grasp and measure the edge of the workpiece, which improves the detection effect of the flash tester;
  • the flash tester can control the illumination of each illumination sub-area separately. Turn off some lighting partitions to reduce the obstruction of display lines, so that the flash tester can accurately obtain the contour of the workpiece to be measured, which further improves the detection effect of the flash tester.
  • the segregation synthesis on the software highlights the details of the workpiece in the height direction of the workpiece;
  • the dimming controller is used to control the overall brightness of the first lighting source and the second lighting source
  • the control module is used to control the first lighting partition and the second lighting partition, which effectively reduces the difficulty of controlling the light source, so that the present invention only requires three-way dimming.
  • the light controller and the control modules corresponding to the number of lighting partitions can achieve the control effect, effectively reducing the control cost of the light source;
  • the first moving part can be arranged side by side with the X-axis moving platform in the horizontal direction , thereby effectively shortening the space occupied by the present invention in height; by selecting the cross roller guide rail as the connecting guide rail, the driving force required for the lateral movement of the X-axis mobile platform and the Y-axis mobile platform can be effectively reduced.
  • the linear screw motor as the driving member, the space occupied by the mobile platform in the X and Y axis directions can be effectively reduced, thereby further improving the space utilization rate of the present invention; and because each connecting component of the present invention can be installed on the X axis On the mobile platform, the Y-axis mobile platform can reduce its own thickness to a thin sheet shape, further reducing the height dimension of the present invention;
  • the mobile platform Drive the workpiece to move along the X-axis or Y-axis respectively, so that the main lens can capture images of different positions of the workpiece, and then the software will synthesize the images to obtain the complete image and corresponding size of the workpiece; under the above cooperation,
  • the invention can increase the measurement range of the flash tester to 0.1-400mm without enlarging the main lens, and does not require the operator to manually adjust the position of the workpiece, thereby improving the measurement range of the invention and reducing the required production cost. And simplify worker operations;
  • the navigation camera After the navigation camera is set, it can also cooperate with the binocular vision technology to acquire images of the workpiece, and reconstruct the three-dimensional model according to the acquired three-dimensional point cloud information of the image, thereby increasing the functionality of the present invention
  • the present invention has the characteristics of large measurement range, low production cost and good measurement effect.
  • Fig. 1 is the outline drawing of the present invention
  • Fig. 2 is the internal structure schematic diagram of the present invention
  • Figure 3 is a schematic structural diagram of a lifting assembly
  • Fig. 4 is the structural representation of the mobile platform
  • Fig. 5 is the A-direction view of Fig. 4;
  • Fig. 6 is the installation schematic diagram of the navigation camera
  • FIG. 7 is a schematic diagram of the structure of the measurement light source.
  • the marks in the drawings are: 1-main lens, 2-moving platform, 3-measurement light source, 4-large field of view camera, 5-small field of view camera, 6-zooming lens, 7-object platform, 8-cylinder , 9-lifting rod, 10-drive part, 11-first guide rail, 12-first moving part, 13-second guide rail, 14-second moving part, 15-backlight source, 16-navigation camera, 201-X Axis moving platform, 202-Y-axis moving platform, 301-first lighting source, 302-second lighting source.
  • the general flash tester is composed as shown in Figure 1, including a lift-type main lens 1, the back of the main lens 1 is connected to the flash tester frame through a screw slide, a mobile platform 2 is arranged outside the field of view of the main lens 1, and the main lens 1 is a A microscopic measurement component is provided on one side, and a measurement light source 3 is connected to the other side of the main body lens 1 through the lifting component, and the measurement light source 3 extends between the main body lens 1 and the mobile platform 2 .
  • the main lens 1 is a dual-view lens, and a dual-view telecentric lens can be selected for the dual-view lens.
  • the maximum detection range of the dual-view telecentric lens is 25mm and 100mm, respectively, and a large-view camera 4 and a small-view camera are connected to the outside of the dual-view lens.
  • the camera 5 , the large field of view camera 4 and the small field of view camera 5 are respectively connected to the main lens 1 at a 90° vertical angle.
  • the microscopic measurement assembly includes a lift-type zoom lens 6, a zoom lens camera is externally connected to the zoom lens 6, the range of the zoom lens 6 is 0.1-15mm, and the zoom lens 6 can be an electric zoom lens 6 or a manual zoom lens.
  • the variable magnification lens 6 is provided with a loading platform 7 on the outer side of the variable magnification lens 6 , and the loading platform 7 is arranged independently and parallel to the moving platform 2 .
  • the lifting assembly includes a cylinder 8 located on the side of the main lens 1 away from the microscopic measurement assembly.
  • the cylinder 8 is slidably connected with a lifting rod 9.
  • the shape of the lifting rod 9 is a circular tube, and one side of the lifting rod 9 is connected with a lifting rod 9.
  • the driving part 10 and the bottom of the lift rod 9 are connected to the measuring light source 3 .
  • the driving part 10 is a screw motor or a linear sliding table, wherein the screw motor is connected to the lifting rod 9 through the screw sliding block; the linear sliding table is connected to the lifting rod 9 through the sliding block.
  • the mobile platform 2 includes an X-axis mobile platform 201.
  • the X-axis mobile platform 201 is connected to a Y-axis mobile platform 202 through the first guide rail 11.
  • the Y-axis mobile platform 202 is externally connected to the first moving part 12.
  • the X-axis mobile platform 201 and The first moving parts 12 are arranged side by side in the horizontal direction; the X-axis moving platform 201 is provided with a second guide rail 13 , and the second guide rail 13 is arranged on the X-axis moving platform 201 perpendicular to the first guide rail 11 , and the second guide rail 13 There is a second moving part 14 on the outside.
  • the first moving part 12 and the second moving part 14 have the same structure, including a screw motor, a screw slider is connected to the screw motor, and the screw slider of the first moving part 12 is connected to the Y-axis to move
  • the platform 202, the screw slider of the second moving part 14 is connected to the X-axis moving platform 201.
  • the screw motor is a linear screw motor.
  • the first guide rails 11 are arranged side by side on the left and right sides of the X-axis moving platform 201
  • the second guide rails 13 are arranged side by side on the front and rear sides of the X-axis moving platform 201 .
  • the first moving part 12 is connected to one side of the first guide rail 11 .
  • the first guide rail 11 and the second guide rail 13 are both cross roller guide rails.
  • the lower ends of the first moving part 12 and the second moving part 14 are both provided with grating scales.
  • a protective cover is provided on the outside of the first moving part 12 and the second moving part 14 .
  • the measurement light source 3 includes a first illumination light source 301 and a second illumination light source 302 arranged side by side in the height direction, the illumination light of the first illumination light source 301 is oblique light, and the illumination light of the second illumination light source 302 is 0 Angle of parallel illumination light.
  • the first illuminating light source 301 and the second illuminating light source 302 are externally connected with a casing, and both the first illuminating light source 301 and the second illuminating light source 302 are annularly distributed on the inner wall of the casing.
  • the casing is provided with a cover plate outside the second illumination light source 302, the edge of the cover plate extends to the end of the second illumination light source 302, and the first illumination light source 301 is located inside the cover plate in the horizontal direction.
  • the first illumination light source 301 is composed of four first illumination sub-areas
  • the second illumination light source 302 is composed of four second illumination sub-areas.
  • the backlight source 15 located on the side of the mobile platform 2 away from the measurement light source 3.
  • the backlight source 15, the first illumination light source 301 and the second illumination light source 302 are respectively connected with a dimming controller.
  • the second lighting partitions are respectively connected with control modules; 8-channel I/O control cards can be selected for the control modules.
  • the first illumination light source 301 includes a plurality of LED light sources, and a uniform light plate is provided on the outer side of the LED light sources.
  • the second illumination light source 302 is formed by arranging several light emitting diodes side by side.
  • a navigation camera 16 is arranged above the mobile platform 2 .
  • the navigation cameras 16 slide in a circular shape in the horizontal direction or are distributed in a plurality of circular shapes around the mobile platform 2 .
  • the field of view of the navigation camera 16 extends to the outside of the field of view of the main lens 1 . .
  • the working principle of the present invention when the present invention is measuring, the measuring personnel first select the placement position according to the size of the workpiece, and when the shape of the work station is less than 15mm, place it on the loading platform 7, and then control the zoom lens 6 by electric or manual control. After adjusting the lens magnification to an appropriate range, lift and focus, so that the zoom lens camera can obtain a clear image of the workpiece and complete the measurement.
  • the operator places the workpiece on the mobile platform 2, and then the main lens 1 switches the lens corresponding to the field of view, and the navigation camera 16 probes the edge position of the workpiece.
  • the main lens 1 directly acquires a complete image of the workpiece after raising and lowering the focus.
  • the navigation camera 16 provides the system with the excess position of the workpiece, and then the system is driven to move by the first moving part 12 and the second moving part 14 respectively.
  • the platform 2 moves horizontally along the X and Y axis directions, so that each edge position of the workpiece is moved to the center of the field of view of the main lens 1;
  • the complete image of the workpiece is formed after stitching each partial image, so as to realize the measurement of large-size workpieces exceeding 100mm.
  • the linear screw motor of the second moving part 14 drives the X-axis moving platform 201 to move left and right along the X-axis direction; at the same time, the first moving part 12 drives the Y-axis moving platform 202 to move along the Y-axis direction. Move back and forth to achieve the effect of moving the workpiece in the X and Y axis directions.
  • the position of the screw slider of the first moving part 12 and the second moving part 14 is detected by the grating ruler at the bottom, so as to realize the detection of the displacement distance of the X-axis moving platform 201 and the Y-axis moving platform 202 .
  • the measurement light source 3 is located directly above the workpiece, and the first illumination light source 301 cooperates with the backlight 15 to illuminate the surface and edges of the workpiece.
  • the driving part 10 drives the measuring light source 3 to move along the Z axis through the lifting rod 9, so that the second illumination light source 302 and the edge of the workpiece are flush with each other, and then the second illumination light source 302 is flush with the edge of the workpiece.
  • the light source 302 emits parallel light to irradiate the vertical surface of the workpiece, so that the workpiece is scattered at the end corners of the edge and injected into the main lens 1, so that a sharp contour line can be formed in the field of view of the lens, thereby improving the speed of the flash tester. measurement accuracy.
  • the user can turn off other lighting zones through the control module according to the position of the desired contour line, so that the lens can reduce interference during measurement and further improve the measurement accuracy of the flash tester.
  • the use of partition lighting can also perform segregation synthesis of photos under different lighting conditions on the software, highlighting the details of the workpiece in the height direction of the workpiece.

Abstract

L'invention concerne un instrument de mesure universel d'éclair, comprenant une lentille de corps (1) de type à levage. Une plateforme mobile (2) est installée sur la face extérieure du champ de vision de la lentille de corps (1), un bloc de mesure microscopique est installé sur une face de la lentille de corps (1), et une source de lumière de mesure (3) est reliée à l'autre côté de la lentille de corps (1) au moyen d'un bloc de levage. La coopération de la lentille de corps et du bloc de mesure microscopique peut permettre la mesure de pièces à usiner ayant des tailles différentes dans plusieurs plages de mesure, la coopération d'une caméra de navigation et de la plateforme mobile peut également permettre l'acquisition d'images de différentes parties des pièces à usiner en réglant les positions horizontales des pièces à usiner lorsque les tailles de pièces à usiner sont trop grandes, et puis des images complètes des pièces à usiner sont obtenues par synthèse d'images, élargissant ainsi encore la plage de mesure.
PCT/CN2021/088573 2020-10-22 2021-04-21 Instrument de mesure universel d'éclair WO2022083084A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011136114.0 2020-10-22
CN202011136114.0A CN112229344B (zh) 2020-10-22 2020-10-22 通用闪测仪

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WO2022083084A1 true WO2022083084A1 (fr) 2022-04-28

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CN (1) CN112229344B (fr)
DE (1) DE202021004240U1 (fr)
WO (1) WO2022083084A1 (fr)

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CN112229344B (zh) * 2020-10-22 2022-12-02 杭州魔方智能科技有限公司 通用闪测仪

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WO2004074768A1 (fr) * 2003-02-20 2004-09-02 Ihi Aerospace Co.,Ltd. Dispositif imageur
US20110228082A1 (en) * 2010-03-16 2011-09-22 Kuang-Pu Wen Measuring system for a 3D Object
CN206627075U (zh) * 2017-03-27 2017-11-10 东莞市兆丰精密仪器有限公司 一种双视野高精度外形检测机
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CN212963202U (zh) * 2020-10-22 2021-04-13 杭州魔方智能科技有限公司 一种通用闪测仪

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