CN115144404A - Vision measuring instrument based on telecentric optics technology - Google Patents
Vision measuring instrument based on telecentric optics technology Download PDFInfo
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- CN115144404A CN115144404A CN202211059823.2A CN202211059823A CN115144404A CN 115144404 A CN115144404 A CN 115144404A CN 202211059823 A CN202211059823 A CN 202211059823A CN 115144404 A CN115144404 A CN 115144404A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H27/00—Step-by-step mechanisms without freewheel members, e.g. Geneva drives
- F16H27/02—Step-by-step mechanisms without freewheel members, e.g. Geneva drives with at least one reciprocating or oscillating transmission member
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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Abstract
The invention relates to a vision measuring instrument based on a telecentric optical technology, which comprises a bracket (100); a telecentric lens assembly (101); an object stage (200); a light source assembly (102); a drive unit (300); it passes through drive division (300) drive cylinder guide slot mechanism motion, with automatically regulated objective table (200) for the horizontal position of telecentric mirror head subassembly (101), so that telecentric mirror head subassembly (101) can be automatic progressively shoot the picture of more determinand different positions, realize measuring the omnidirectional vision of determinand, replaced artificial manual or semi-automatic operation, measurement of efficiency and precision are high, and measuring effect is good.
Description
Technical Field
The invention relates to the technical field of vision measurement, in particular to a vision measuring instrument based on a telecentric optical technology, which has high measuring efficiency and high measuring precision.
Background
Vision measurement is a measurement made by a machine instead of the human eye. The machine vision product converts the shot target into an image signal, transmits the image signal to a special image processing system, and converts the image signal into a digital signal, thereby measuring and detecting the product defects. In order to correct the parallax problem of the traditional industrial lens, a Telecentric lens (Telecentric) is produced, meanwhile, the lens distortion problem of the traditional industrial lens can be effectively solved through the special parallel light path design of the Telecentric lens, the Telecentric lens can be in a certain object distance range, the magnification of the obtained image cannot be changed, and therefore objects to be measured with different thicknesses can be measured. In addition, compare in traditional industrial lens, telecentric mirror head is applicable to the determinand that the position differs, become certain angle or from taking the aperture with the camera lens more, and telecentric mirror head measurement accuracy is higher simultaneously. When the upper surfaces of the objects to be measured are approximately the same but have different thicknesses, the telecentric lens is used for eliminating the difference of pictures shot by the objects to be measured with different thicknesses so as to more accurately measure the difference of the surfaces of the objects to be measured.
The existing vision measuring instrument has limitations in the aspect of automation, for example, when the vision measuring is carried out on a larger or more object to be measured, a lens or an object stage needs to be manually or semi-automatically adjusted for multiple times, so that the lens can shoot more images of the object to be measured, the object to be measured is subjected to all-dimensional measurement, the measuring efficiency and the measuring precision are low, and the measuring effect is poor. Therefore, a vision measuring instrument based on telecentric optics technology with high measuring efficiency and high measuring accuracy is needed at present.
Disclosure of Invention
The invention aims to provide a vision measuring instrument based on telecentric optics technology, which has high measuring efficiency and high measuring precision.
The invention relates to a vision measuring instrument based on telecentric optics technology, which comprises
The bracket is fixed with the rack;
a telecentric lens assembly connected to the bracket;
the objective table is used for bearing an object to be measured;
a light source assembly for providing light source illumination to the stage, the light source assembly being fixed to the support;
and the driving part drives the roller guide groove mechanism to move through the motor, so that the objective table moves in a reciprocating manner in the horizontal direction, and the relative position of the objective table and the telecentric lens component is automatically adjusted and driven.
The invention relates to a vision measuring instrument based on a telecentric optical technology, wherein a driving part comprises a motor, a roller, a first guide groove, a first clamping pin, a guide plate, a first guide rail and a second guide groove;
the support is fixed with a motor, an output shaft of the motor is coaxially fixed with the roller, a first guide groove is formed in the outer circumferential surface of the roller, a first bayonet lock moving along the first guide groove is arranged in the first guide groove, the first bayonet lock is fixed with the lower surface of the guide plate, the guide plate is arranged in the first guide rail and moves along the first guide rail, the first guide rail is fixed with the support, a second guide groove is formed in the upper surface of the guide plate, an objective table moving along the second guide groove is arranged in the second guide groove, and the objective table is in driving connection with the motor.
The invention relates to a vision measuring instrument based on a telecentric optical technology, wherein a motor is in driving connection with an objective table through an intermittent part, and the intermittent part comprises a deflector rod, a first pin shaft, a second pin shaft, a first clamping groove, a turntable, an arc-shaped notch, a sector plate, a first shaft, a first gear and a rack;
the output shaft of the motor is fixed with the middle of the deflector rod, a first pin shaft and a second pin shaft are respectively fixed at two ends of the deflector rod, the first pin shaft and the second pin shaft can be arranged in a first clamping groove and move along the first clamping groove, 4 first clamping grooves are uniformly distributed on the outer circumferential surface of the turntable, 4 arc-shaped notches are uniformly formed in the outer circumferential surface of the turntable in the circumferential direction, the first clamping grooves and the arc-shaped notches are arranged in a staggered mode, the outer edges of sector plates matched with the arc-shaped notches in shape can be arranged in the arc-shaped notches, the two sector plates are symmetrically arranged relative to the deflector rod, and the two sector plates are fixed with the deflector rod;
the turntable is coaxially fixed with a first shaft, the first shaft is connected with the support bearing, the first shaft is coaxially fixed with a first gear, the first gear is meshed with a rack, and the rack is fixed with the lower surface of the objective table.
The invention relates to a vision measuring instrument based on a telecentric optical technology, wherein an objective table comprises a movable frame and a light-transmitting plate which are fixedly connected;
the light source assembly comprises a light source module and a reflector, and the light source module and the reflector are fixed with the support.
The invention relates to a vision measuring instrument based on a telecentric optical technology, wherein a power module arranged on a motor comprises a battery, an electric control module and a wireless communication module, the wireless communication module is electrically connected with the electric control module, and the wireless communication module is wirelessly connected with a user terminal.
The invention relates to a vision measuring instrument based on a telecentric optical technology, wherein the section of a guide plate is in a dovetail shape, and the section of a first guide rail is in the dovetail shape matched with the section of the guide plate.
The invention relates to a vision measuring instrument based on a telecentric optical technology, wherein two groups of first guide rails are symmetrically arranged about a center line of a guide plate.
The invention relates to a vision measuring instrument based on a telecentric optical technology, wherein a second guide groove is vertically arranged with a first guide rail.
The invention relates to a vision measuring instrument based on a telecentric optical technology, wherein a first guide block is fixed on the lower surface of an objective table, the section of the first guide block is in a dovetail shape, and the section of a second guide groove is in a dovetail shape matched with the section of the first guide block.
The invention relates to a vision measuring instrument based on a telecentric optical technology, wherein the width of a rack is greater than or equal to the stroke of a stage capable of moving along a first guide rail.
The vision measuring instrument based on the telecentric optics technology is different from the prior art in that the vision measuring instrument based on the telecentric optics technology can automatically adjust the horizontal position of the objective table relative to the telecentric lens assembly so that the telecentric lens assembly can automatically and completely shoot more pictures of different positions of an object to be measured step by step, thus realizing the omnibearing vision measurement of the object to be measured, replacing manual or semi-automatic operation, and having high measuring efficiency; the vision measuring instrument based on the telecentric optical technology adopts the telecentric lens to replace the traditional industrial lens, and has the following advantages: no parallax, extremely low distortion rate and high precision; meanwhile, in a certain object distance range, the magnification of the image obtained by using the telecentric lens is unchanged, so that the magnification of the image obtained when the object to be detected with different thicknesses is shot is consistent; in addition, the telecentric lens is more suitable for objects to be measured with different positions, certain angles with the lens or self-provided apertures, and has wide application range.
The vision measuring instrument based on the telecentric optical technology is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of a vision measuring instrument based on telecentric optics;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is an isometric view of FIG. 1;
FIG. 4 is a schematic view of the drum outer surface being unrolled;
FIG. 5 is an enlarged partial view of the first position of FIG. 2;
FIG. 6 is an enlarged view of a portion of FIG. 1;
FIG. 7 is an enlarged partial view of the second position of FIG. 2;
fig. 8 is a movement state change diagram of fig. 6.
Detailed Description
As shown in 1~8, referring to fig. 1, 2 and 3, the vision measuring instrument based on telecentric optical technology of the invention comprises
A bracket 100 fixed to the frame;
a telecentric lens assembly 101 connected to the holder 100;
an object stage 200 for carrying an object to be tested;
a light source assembly 102 for providing light source illumination to the stage 200, the light source assembly 102 being fixed to the support 100;
and the driving part 300 drives the roller guide groove mechanism to move through the motor 301, so that the object stage 200 can move back and forth in the horizontal direction, and the relative position of the object stage 200 and the telecentric lens assembly 101 can be automatically adjusted.
According to the invention, the driving part 300 drives the roller guide groove mechanism to move so as to automatically adjust the horizontal position of the objective table 200 relative to the telecentric lens assembly 101, so that the telecentric lens assembly 101 can automatically and completely shoot more pictures of different positions of an object to be measured step by step, thus the omnibearing visual measurement of the object to be measured is realized, manual or semi-automatic operation is replaced, the measurement efficiency and precision are high, and the measurement effect is good.
The invention adopts the telecentric lens to replace the traditional industrial lens, and has the following advantages: no parallax, extremely low distortion rate and high precision; meanwhile, in a certain object distance range, the magnification of the image obtained by using the telecentric lens is unchanged, so that the magnification of the image obtained when the object to be detected with different thicknesses is shot is consistent; in addition, the telecentric lens is more suitable for objects to be measured with different positions, certain angles with the lens or self-provided apertures, and has wide application range.
Wherein, the telecentric lens assembly 101 is fixed with the bracket 100.
According to the invention, the supporting and fixing functions of the telecentric lens assembly 101 are realized through the arrangement.
The telecentric lens assembly 101 is internally provided with a telecentric lens and an industrial camera, and the telecentric lens assembly 101 obtains image signals by shooting objects to be detected on the objective table 200 and transmits the image signals to the image processing system to obtain digital signals, so that the objects to be detected are measured and the defects are detected. The method and process of using an industrial camera and lens for vision measurement are prior art and will not be described herein.
The telecentric lens assembly 101 comprises a power supply and a wireless transmission module, wherein the wireless transmission module is in wireless connection with an image processing system, and the image processing system can be a mobile phone or a computer.
The roller guide groove mechanism comprises a roller 302, a first guide groove 303, a first bayonet 304 and a guide plate 305.
As a further explanation of the present invention, referring to fig. 1, 2, 3, and 4, the driving part 300 includes a motor 301, a roller 302, a first guide groove 303, a first locking pin 304, a guide plate 305, a first guide rail 306, and a second guide groove 307;
a motor 301 is fixed on the bracket 100, an output shaft of the motor 301 is coaxially fixed with the roller 302, a first guide groove 303 is formed on the outer circumferential surface of the roller 302, a first bayonet lock 304 moving along the first guide groove 303 is arranged in the first guide groove 303, the first bayonet lock 304 is fixed with the lower surface of a guide plate 305, the guide plate 305 is arranged in a first guide rail 306 and moves along the first guide rail 306, the first guide rail 306 is fixed with the bracket 100, a second guide groove 307 is formed on the upper surface of the guide plate 305, the object stage 200 moving along the second guide groove 307 is arranged in the second guide groove 307, and the object stage 200 is in driving connection with the motor 301.
According to the invention, the motor 301 drives the roller 302 to rotate, meanwhile, the first bayonet lock 304 is arranged in the first guide groove 303 with a special shape, the first bayonet lock 304 drives the guide plate 305 and the object stage 200 to intermittently move along the first guide rail 306, and when the guide plate moves to the farthest end, the guide plate and the object stage 200 can also intermittently move back; according to the invention, the linear motor in the motor 301 drives the object stage 200 to intermittently move along the first guide groove 303, so that the object stage 200 can intermittently move in two horizontal and vertical directions and is matched with each other, the horizontal position of the object stage 200 relative to the telecentric lens assembly 101 is automatically controlled, and more pictures of different positions of an object to be measured can be automatically and completely shot by the telecentric lens assembly 101 step by step, so that the omnibearing visual measurement of the object to be measured is realized, manual or semi-automatic operation is replaced, the measurement efficiency and precision are high, and the measurement effect is good.
Referring to fig. 4, the first guide groove 303 includes a first straight groove 311, a first inclined groove 312, a second straight groove 313, a second inclined groove 314, a third straight groove 315, a third inclined groove 316, a fourth straight groove 317, a fourth inclined groove 318, and a fifth straight groove 319 which are sequentially connected end to end;
two groups of first structures formed by the first straight groove 311, the first inclined groove 312, the second straight groove 313, the second inclined groove 314, the third straight groove 315, the third inclined groove 316, the fourth straight groove 317 and the fourth inclined groove 318 are symmetrically arranged on the center line of the fifth straight groove 319;
the first straight groove 311 is communicated with the first straight groove 311 in the first structure body of the symmetrical group;
the fourth inclined slots 318 communicate with one end of a fifth straight slot 319, and the other end of the fifth straight slot 319 communicates with the fourth inclined slots 318 in the first structural body of the symmetrical group.
The present invention achieves the above arrangement that when the first detent 304 moves in the first straight groove 311, the object stage 200 remains stationary in the direction of the first guide rail 306, when the first detent 304 moves in the first inclined groove 312, the object stage 200 moves in the direction of the first guide rail 306, when the first detent 304 moves in the second straight groove 313, the object stage 200 remains stationary in the direction of the first guide rail 306, when the first detent 304 moves in the second inclined groove 314, the object stage 200 moves in the direction of the first guide rail 306, and so on, until after the first detent 304 completes the movement in the fifth straight groove 319, that is, the last straight groove, the object stage 200 will move in the opposite direction of the first guide rail 306, thereby completing the intermittent movement of the object stage 200 in the opposite direction after the intermittent movement in the direction of the first guide rail 306, and so on.
Of course, the first guide groove 303 may also be: comprises a first straight groove 311, a first inclined groove 312, a second straight groove 313, a second inclined groove 314, a third straight groove 315, a third inclined groove 316, a fourth straight groove 317, a fourth inclined groove 318, a fifth straight groove 319, a fifth inclined groove and a sixth straight groove which are sequentially communicated end to end. That is, a person skilled in the art can adjust the number of straight slots and inclined slots between the first straight slot and the last straight slot according to the length of the drum 302, thereby adjusting the distance that the stage 200 can intermittently move in the direction of the first guide rail 306 and the frequency of the intermittent movement.
The motor 301 includes a rotating motor and a linear motor, the rotating motor is fixed to the bracket 100, an output shaft of the rotating motor is coaxially fixed to the drum 302, the linear motor is fixed to the drum 305, an output shaft of the linear motor is fixed to the stage 200, and a direction of the output shaft of the linear motor is the same as a direction of the second guide groove 307.
According to the arrangement, the object stage 200 is driven by the rotating motor and the linear motor together, so that the object stage 200 moves in two horizontal and vertical directions, and the horizontal position of the object stage 200 relative to the telecentric lens assembly 101 is automatically adjusted.
As a further explanation of the present invention, referring to fig. 3 and 5, the motor 301 is drivingly connected to the object stage 200 through an intermittent part 400, and the intermittent part 400 includes a shift lever 401, a first pin 402, a second pin 403, a first slot 404, a turntable 405, an arc notch 406, a sector plate 407, a first shaft 408, a first gear 409, and a rack 410;
an output shaft of the motor 301 is fixed to the middle of a shift lever 401, a first pin shaft 402 and a second pin shaft 403 are fixed to two ends of the shift lever 401 respectively, the first pin shaft 402 and the second pin shaft 403 can be configured in a first slot 404 and move along the first slot 404, 4 first slots 404 are uniformly distributed on the outer circumferential surface of a turntable 405, 4 arc-shaped notches 406 are uniformly formed in the outer circumferential surface of the turntable 405 in the circumferential direction, the first slot 404 and the arc-shaped notches 406 are arranged in a staggered manner, the outer edges of sector plates 407 matched with the arc-shaped notches in shape can be configured in the arc-shaped notches 406, two sector plates 407 are symmetrically arranged with respect to the shift lever 401, and the two sector plates 407 are fixed to the shift lever 401;
the turntable 405 is coaxially fixed with a first shaft 408, the first shaft 408 is in bearing connection with the bracket 100, the first shaft 408 is coaxially fixed with a first gear 409, the first gear 409 is engaged with a rack 410, and the rack 410 is fixed with the lower surface of the object stage 200.
According to the invention, the driving lever 401 is driven to rotate by the motor 301, the first pin shaft 402 or the second pin shaft 403 can be arranged in the first slot 404, so that the turntable 405 rotates 1/4 of a turn each time, when the first pin shaft 402 or the second pin shaft 403 is not arranged in the first slot 404, the turntable 405 is locked, that is, the position of the objective table 200 in the direction of the second guide slot 307 is locked; according to the invention, by arranging the intermittent part 400 with the structure, every time the output shaft of the motor 301 rotates for a half circle, the turntable 405 rotates for 1/4 of a circle and stops, that is, the objective table 200 moves along the first guide rail 306 for the whole stroke, the telecentric lens assembly 101 finishes the visual measurement of one line of the object to be measured on the objective table 200, and the objective table 200 moves once along the second guide groove 307 in a small amplitude; the object stage 200 moves along the first guide rail 306 in the opposite direction for a whole stroke, the telecentric lens assembly 101 completes the visual measurement of the second line of the object to be measured on the object stage 200, and the object stage 200 moves once again along the second guide groove 307 in a small amplitude, and the process is repeated until the telecentric lens assembly 101 completes the visual measurement of the object to be measured on the object stage 200; according to the invention, the driving part 300 and the intermittent part 400 are arranged to realize that the object stage 200 can intermittently move in two horizontal and vertical directions and are mutually matched, so that the horizontal position of the object stage 200 relative to the telecentric lens assembly 101 is automatically controlled, and more pictures of different positions of an object to be measured on the object stage 200 can be automatically and completely shot by the telecentric lens assembly 101 step by step, thereby realizing omnibearing visual measurement of the object to be measured, replacing manual or semi-automatic operation, and having high measurement efficiency and precision and good measurement effect.
The motor 301 can rotate forward and backward, so that after the omnibearing visual measurement of the object to be measured on the object stage 200 is completed, when the next object to be measured is measured visually, the output shaft of the motor 301 needs to be rotated reversely, and the same visual measurement effect can be achieved.
The first shaft 408 is vertically arranged with an output shaft of the motor 301, and a distance between the first shaft 408 and the output shaft of the motor 301 is greater than half of the length of the shift lever 401;
the symmetry axis of the sector plate 407 is perpendicular to the length direction of the shift lever 401;
the width of the first slot 404 is greater than the diameter of the first pin 402 or the second pin 403.
Through the arrangement, the first pin shaft 402 or the second pin shaft 403 can be configured in the first clamping groove 404, so that the rotating disc 405 rotates 1/4 of a turn, and the rotating disc 405 rotates 1/4 of a turn and stops when the output shaft of the motor 301 rotates a half turn.
The first shaft 408 is connected to one end of the first support rod 421 through a bearing, and the other end of the first support rod 421 is fixed to the bracket 100.
The first shaft 408 is supported and fixed by the arrangement of the invention.
As a further explanation of the present invention, referring to fig. 1, 3, 6, 7, and 8, an adjusting portion 500 is configured on the bracket 100, and the adjusting portion 500 includes a lead screw 501, a second gear 502, a nut 503, a first square hole 504, a first link 505, a second link 506, a swing link 507, a threaded hole 508, a bolt 509, a connecting shaft 510, a sector-shaped slider 511, and an arc-shaped guide rail 512;
an output shaft of the motor 301 is in driving connection with a lead screw 501 and a second gear 502, the lead screw 501 is in threaded connection with a nut 503, the nut 503 is arranged in a first square hole 504 matched with the cross section shape of the nut 503 and moves and synchronously rotates along the first square hole, the first square hole 504 is coaxially arranged on the second gear 502, and the second gear 502 is in bearing connection with the bracket 100;
the outer surface of the nut 503 is fixed with one end of a first connecting rod 505, the other end of the first connecting rod 505 is hinged with one end of a second connecting rod 506, the other end of the second connecting rod 506 is hinged with one end of a swing link 507, the middle part of the swing link 507 is connected with one end of a connecting shaft 510 through a bearing, the other end of the connecting shaft 510 is fixed with a sector sliding block 511, the sector sliding block 511 is arranged in an arc-shaped guide rail 512 and moves along the arc-shaped guide rail 512, the circle center of a circle corresponding to the sector sliding block 511 and the arc-shaped guide rail 512 is overlapped with the axis of the second gear 502, and the arc-shaped guide rail 512 is fixed with the bracket 100;
a threaded hole 508 is formed in the other end of the oscillating bar 507, the threaded hole 508 is in threaded connection with a bolt 509, and the bolt 509 is fixed to the telecentric lens assembly 101.
According to the invention, when the motor 301 drives the lead screw 501 to rotate, the second gear 502 is controlled to be stationary, the nut 503 moves along the first square hole 504, and under the action of the four-bar linkage of the first link 505, the second link 506 and the swing link 507, the telecentric lens assembly 101 can swing around the hinged position of the swing link 507 and the bracket 100, so that the left-right orientation angle of the telecentric lens assembly 101 can be adjusted; when the motor 301 drives the second gear 502 to rotate, the telecentric lens assembly 101 moves along the arc-shaped guide rail 512 along with the nut 503, the first connecting rod 505, the second connecting rod 506, the oscillating bar 507 and the connecting shaft 510 integrally along with the fan-shaped slide block 511, that is, rotates around the axial direction of the second gear 502, so as to adjust the orientation angle of the telecentric lens assembly 101 in the front and back direction, and at the moment, the rotation angle of the lead screw 501 is controlled to be free, so that the lead screw 501 can rotate along with the nut 503 and the second gear 502 and keep relatively static, and the change of the left and right orientation angle of the telecentric lens assembly 101 is avoided. According to the invention, through the control mode, the left-right orientation angle and the front-back orientation angle of the telecentric lens assembly 101 can be freely adjusted, so that the imaging error generated when the object to be detected on the object stage 200 is shot is reduced or eliminated.
The motor 301 includes a first motor, a second motor, and a third motor, the first motor, the second motor, and the third motor are all fixed to the bracket 100, an output shaft of the first motor is coaxially fixed to the drum 302, an output shaft of the second motor is coaxially fixed to the lead screw 501, and an output shaft of the third motor is coaxially fixed to the second gear 502.
According to the invention, through the arrangement, the roller 302, the lead screw 501 and the second gear 502 can be driven independently.
Wherein the length of the nut 503 is greater than the thickness of the second gear 502.
Through the arrangement, after the nut 503 moves along the second gear 502, the second gear 502 can still drive the nut 503 to rotate.
Wherein, the axis of the hinge at the hinge joint of the middle part of the swing link 507 and the bracket 100 is coplanar with the axis of the lead screw 501; the second link 506 is horizontally disposed.
Through the arrangement, the first connecting rod 505, the second connecting rod 506 and the swinging rod 507 can form a four-bar mechanism, so that the left-right orientation angle and the front-back orientation angle of the telecentric lens assembly 101 can be freely adjusted.
The other end of the oscillating bar 507 and the telecentric lens assembly 101 can be connected by a buckle except for the connection mode of the threaded hole 508 and the bolt 509, so that different telecentric lens assemblies 101 can be conveniently replaced to adapt to different vision measurement requirements.
The fan-shaped sliding block 511 is fixed to one end of a first spring 513, the other end of the first spring 513 is fixed to the arc-shaped guide rail 512, and the number of the first springs 513 is two and is symmetrically arranged about the center of the arc-shaped guide rail 512.
According to the invention, the two first springs 513 are arranged, so that a better supporting effect on the fan-shaped sliding block 511 is realized.
The cross section of the fan-shaped sliding block 511 is dovetail-shaped, and the cross section of the arc-shaped guide rail 512 is dovetail-shaped matched with the cross section of the fan-shaped sliding block 511.
According to the invention, the connection failure of the sector sliding block 511 and the arc-shaped guide rail 512 is avoided through the arrangement.
The arc-shaped guide rail 512 is fixed to one end of a third support bar 521, and the other end of the third support bar 521 is fixed to the bracket 100.
According to the invention, the arc-shaped guide rail 512 is supported and fixed through the arrangement.
As a further explanation of the present invention, referring to fig. 1, 3, 6, 7, and 8, the output shaft of the motor 301 is drivingly connected to the lead screw 501 and the second gear 502 via a control unit 600, and the control unit 600 includes a first pulley 601, a second pulley 602, a belt 603, a square shaft 604, a key groove 605, a key 606, a first magnet 607, a second spring 608, a second magnet 609, a third magnet 610, a guide frame 611, a second guide rail 612, a third gear 613, a second square hole 614, a fourth gear 615, a third link 616, a friction block 617, and a first through hole 618;
an output shaft of the motor 301 is coaxially fixed with a first belt pulley 601, the first belt pulley 601 is in belt transmission connection with a second belt pulley 602 through a belt 603, the second belt pulley 602 is coaxially fixed with a square shaft 604, the square shaft 604 is in bearing connection with the bracket 100, the square shaft 604 and the second belt pulley 602 are jointly provided with a key groove 605, a key 606 moving along the key groove 605 is arranged in the key groove 605, the key 606 can be attracted by the first magnet 607, the first magnet 607 is fixed in the key groove 605, one end of the first magnet 607 is fixed with one end of a second spring 608, and the other end of the second spring 608 is fixed with the key 606;
the square shaft 604 is disposed in a first through hole 618 and moves and rotates relatively along the first through hole 618, the first through hole 618 is opened on the guide frame 611, the guide frame 611 is disposed in a second guide rail 612 and moves along the second through hole, the second guide rail 612 is fixed to the support 100, a second magnet 609 and a third magnet 610 are fixed to the second guide rail 612, the second magnet 609 and the third magnet 610 can respectively attract two outer side surfaces of the guide frame 611, two inner side surfaces of the guide frame 611 can respectively overlap with two side surfaces of a third gear 613, a second square hole 614 is coaxially opened in the third gear 613, the square shaft 604 which moves along the second square hole 614 and rotates synchronously is disposed in the second square hole 614, the third gear 613 can be meshed with the second gear 502 or the fourth gear 615, the fourth gear 615 is coaxially fixed to the lead screw 501, and the lead screw 501 is in bearing connection with the support 100;
the guide frame 611 is fixed to one end of the third link 616, the other end of the third link 616 is fixed to the friction block 617, and the friction block 617 can be overlapped with a side surface of the second gear 502.
The invention drives the first belt pulley 601 to rotate through the output shaft of the motor 301, so that the second belt pulley 602 rotates, the first magnet 607 is controlled to be electrified to attract the key 606, the square shaft 604 is static, and the orientation angle of the telecentric lens assembly 101 is not adjusted at this time; by controlling the first magnet 607 to be de-energized and under the action of the second spring 608, the key 606 is positioned in the key groove 605 of the second pulley 602, the square shaft 604 rotates, and the third gear 613 rotates;
according to the invention, the second magnet 609 is controlled to attract one outer side surface of the guide frame 611, the guide frame 611 moves along the second guide rail 612, the third gear 613 is stirred to move along the third square shaft 604 so as to enable the third gear 613 to be meshed with the fourth gear 615, the lead screw 501 rotates, the braking effect on the second gear 502 is realized through the friction block 617, and the left-right orientation angle of the lens telecentric lens assembly 101 can be adjusted; the invention controls the third magnet 610 to attract the other outer side surface of the guide frame 611, the guide frame 611 moves reversely along the second guide rail 612, the third gear 613 is stirred to move reversely along the third shaft 604 so as to enable the third gear 613 to be meshed with the second gear 502, at this time, the lead screw 501 is in a free rotatable state, and the orientation angle of the telecentric lens assembly 101 in the front and back direction can be adjusted;
according to the invention, the left-right orientation angle and the front-back orientation angle of the telecentric lens assembly 101 can be controllably and automatically adjusted by controlling the electrifying states of the first magnet 607, the second magnet 609 and the third magnet 610, so that the imaging error generated when the object to be detected on the object stage 200 is shot is reduced or eliminated.
The key 606 is made of a permanent magnet, the first magnet 607 is an electromagnet, the power module provided with the first magnet 607 comprises a battery, an electric control module and a wireless communication module, the wireless communication module is electrically connected with the electric control module, and the wireless communication module is wirelessly connected with the user terminal.
According to the invention, the wireless communication module can directly enable the user terminal to wirelessly control the attraction state between the first magnet 607 and the key 606, so as to control whether the second belt wheel 602 drives the square shaft 604 to rotate.
Wherein the second spring 608 is in a compressed state.
With the above arrangement, the key 606 can be always arranged in the key groove 605 of the second pulley 602 by the resilient action of the second spring 608 when the first magnet 607 is deenergized.
The material of the guide frame 611 is a permanent magnet, the second magnet 609 and the third magnet 610 are electromagnets, the power supply modules arranged on the second magnet 609 and the third magnet 610 comprise a battery, an electric control module and a wireless communication module, the wireless communication module is electrically connected with the electric control module, and the wireless communication module is wirelessly connected with the user terminal.
The wireless communication module can directly enable the user terminal to wirelessly control the attraction state between the second magnet 609 and the guide frame 611, and control the guide frame 611 to move along the second guide rail 612, so as to control the third gear 613 to be meshed with the second gear 502 or the fourth gear 615.
The guide frame 611 may also have a through hole, so that the guide frame 611 does not rotate with respect to the square shaft 604.
The cross section of the bottom of the guide frame 611 is in a dovetail shape, and the cross section of the second guide rail 612 is in a dovetail shape matched with the cross section of the bottom of the guide frame 611.
According to the invention, the guide frame 611 and the second guide rail 612 are prevented from being connected and failing through the arrangement.
The cross section of the key 606 is dovetail-shaped, and the cross section of the key groove 605 is dovetail-shaped matched with the cross section of the key 606.
According to the invention, through the arrangement, the failure of the connection between the key 606 and the key groove 605 is avoided.
The distance between the second gear 502 and the fourth gear 615 is less than or equal to the thickness of the third gear 613, and the third gear 613 can be separately meshed with the second gear 502 or the fourth gear 615.
According to the invention, through the arrangement, when the second magnet 609 is attracted to the guide frame 611, the third gear 613 is meshed with the fourth gear 615, and when the third magnet 610 is attracted to the guide frame 611, the third gear 613 is meshed with the second gear 502, and the meshing thickness is enough to enable stable transmission between the gears.
The friction block 617 is made of rubber, asbestos fiber, or the like, so that when the friction block 617 is overlapped with a side surface of the second gear 502, a braking action can be generated on the second gear 502.
The friction block 617 may be disposed in a circumferential recess formed in an end surface of the second gear 502, and may also have an effect of restricting rotation of the second gear 502.
As a further explanation of the present invention, referring to fig. 1 and 3, the object stage 200 includes a moving frame 201 and a transparent plate 202;
the light source assembly 102 includes a light source module 111 and a reflector 112, and both the light source module 111 and the reflector 112 are fixed to the bracket 100.
In the invention, the parallel light emitted by the light source module 111 is reflected to the object to be measured on the light-transmitting plate 202 through the reflector 112, so as to provide backlight irradiation for the object to be measured, thereby better highlighting the edge profile imaging of the object to be measured and being beneficial to measuring the profile size of the object to be measured.
The light-transmitting plate 202 is an optical glass sheet coated with a light-transmitting film.
The relative position relationship among the telecentric lens assembly 101, the light source module 111 and the reflector 112 satisfies the following conditions: the center line of the light rays irradiated to the reflector 112 by the light source module 111 coincides with the center line of the telecentric lens assembly 101 in the vertical state.
As a further explanation of the present invention, referring to fig. 1 and 3, the motor 301 is provided with a power module including a battery, an electronic control module, and a wireless communication module, wherein the wireless communication module is electrically connected to the electronic control module, and the wireless communication module is wirelessly connected to a user terminal.
The wireless communication module can directly enable the user terminal to wirelessly control the motor 301, so that the rotating speed, the rotating direction and the power of the motor 301 can be adjusted, and the moving speed of the objective table 200 can be adjusted at will.
For further explanation of the present invention, referring to fig. 3, the cross-section of the guide plate 305 is dovetail-shaped, and the cross-section of the first guide rail 306 is dovetail-shaped to match the cross-section of the guide plate 305.
The guide plate 305 and the first guide rail 306 are prevented from being connected and failing through the arrangement.
For further explanation of the present invention, referring to fig. 3, the first guide rails 306 are symmetrically arranged in two sets about a center line of the guide plate 305.
According to the invention, through the arrangement, the first guide rail 306 has better supporting and guiding effects on the guide plate 305.
For further explanation of the present invention, referring to fig. 3, the second guide groove 307 is disposed perpendicular to the first guide rail 306.
The object stage 200 can move along the first guide rail 306 along with the guide plate 305 through the arrangement, and the object stage 200 can also move along the second guide groove 307, so that the object stage 200 can move in two horizontal and vertical directions.
As a further explanation of the present invention, referring to fig. 3, a first guide block 321 is fixed to a lower surface of the stage 200, a cross section of the first guide block 321 is a dovetail shape, and a cross section of the second guide groove 307 is a dovetail shape matching with the cross section of the first guide block 321.
According to the invention, the connection failure of the object stage 200 and the second guide groove 307 is avoided through the arrangement.
For further explanation of the present invention, referring to fig. 3, the width of the rack 410 is equal to or greater than the stroke of the stage 200 capable of moving along the first rail 306.
According to the invention, through the arrangement, the first gear 409 can be always meshed with the rack 410.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. A vision measuring instrument based on telecentric optics technology is characterized in that: comprises that
A bracket (100) fixed to the frame;
a telecentric lens assembly (101) connected to the holder (100);
the object stage (200) is used for bearing an object to be tested;
a light source assembly (102) for providing light source illumination to the object table (200), the light source assembly (102) being fixed with the holder (100);
and the driving part (300) drives the roller guide groove mechanism to move through a motor (301), so that the objective table (200) can move in a reciprocating manner in the horizontal direction, and the relative position of the objective table (200) and the telecentric lens assembly (101) can be automatically adjusted and driven.
2. A vision measuring instrument based on telecentric optics technology according to claim 1, characterized in that:
the driving part (300) comprises a motor (301), a roller (302), a first guide groove (303), a first clamping pin (304), a guide plate (305), a first guide rail (306) and a second guide groove (307);
the motor (301) is fixed on the support (100), an output shaft of the motor (301) is coaxially fixed with the roller (302), a first guide groove (303) is formed in the outer circumferential surface of the roller (302), a first clamping pin (304) moving along the first guide groove is arranged in the first guide groove (303), the first clamping pin (304) is fixed with the lower surface of the guide plate (305), the guide plate (305) is arranged in the first guide rail (306) and moves along the first guide rail, the first guide rail (306) is fixed with the support (100), a second guide groove (307) is formed in the upper surface of the guide plate (305), the objective table (200) moving along the second guide rail is arranged in the second guide groove (307), and the objective table (200) is in driving connection with the motor (301).
3. A vision measuring instrument based on telecentric optics technology according to claim 2, characterized in that:
the motor (301) is in driving connection with the objective table (200) through an intermittent part (400), and the intermittent part (400) comprises a shifting rod (401), a first pin shaft (402), a second pin shaft (403), a first clamping groove (404), a rotary table (405), an arc-shaped notch (406), a sector plate (407), a first shaft (408), a first gear (409) and a rack (410);
the output shaft of the motor (301) is fixed to the middle of a shifting rod (401), two ends of the shifting rod (401) are respectively fixed with a first pin shaft (402) and a second pin shaft (403), the first pin shaft (402) and the second pin shaft (403) can be configured in a first clamping groove (404) and move along the first pin shaft, 4 first clamping grooves (404) are uniformly distributed on the outer circumferential surface of a turntable (405), 4 arc-shaped notches (406) are uniformly formed in the outer circumferential surface of the turntable (405) in the circumferential direction, the first clamping grooves (404) and the arc-shaped notches (406) are arranged in a staggered mode, the outer edges of sector plates (407) matched with the arc-shaped notches in shape can be configured in the arc-shaped notches (406), the two sector plates (407) are symmetrically arranged relative to the shifting rod (401), and the two sector plates (407) are fixed to the shifting rod (401);
the turntable (405) and a first shaft (408) are coaxially fixed, the first shaft (408) is in bearing connection with the support (100), the first shaft (408) and a first gear (409) are coaxially fixed, the first gear (409) is meshed with a rack (410), and the rack (410) and the lower surface of the object stage (200) are fixed.
4. A vision measuring instrument based on telecentric optics technology according to claim 3, characterized in that:
the object stage (200) comprises a moving frame (201) and a light transmission plate (202) which are fixedly connected;
the light source assembly (102) comprises a light source module (111) and a reflector (112), and the light source module (111) and the reflector (112) are fixed on the support (100).
5. A vision measuring instrument based on telecentric optics technology according to claim 4, characterized in that:
the power module that motor (301) was equipped with includes battery, electronic control module, wireless communication module with electronic control module electricity is connected, wireless communication module and user terminal wireless connection.
6. A vision measuring instrument based on telecentric optics technology according to claim 5, characterized in that:
the cross section of the guide plate (305) is in a dovetail shape, and the cross section of the first guide rail (306) is in a dovetail shape matched with the cross section of the guide plate (305).
7. A vision measuring instrument based on telecentric optics technology according to claim 6, characterized in that:
the first guide rails (306) are symmetrically arranged in two groups about a center line of the guide plate (305).
8. A vision measuring instrument based on telecentric optics technology according to claim 7, characterized in that:
the second guide groove (307) is arranged perpendicular to the first guide rail (306).
9. A vision measuring instrument based on telecentric optics technology according to claim 8, characterized in that:
the lower surface of the object stage (200) is fixed with a first guide block (321), the section of the first guide block (321) is in a dovetail shape, and the section of the second guide groove (307) is in a dovetail shape matched with the section of the first guide block (321).
10. A vision measuring instrument based on telecentric optics according to claim 9, wherein:
the width of the rack (410) is greater than or equal to the stroke of the object stage (200) capable of moving along the first guide rail (306).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211059823.2A CN115144404A (en) | 2022-09-01 | 2022-09-01 | Vision measuring instrument based on telecentric optics technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211059823.2A CN115144404A (en) | 2022-09-01 | 2022-09-01 | Vision measuring instrument based on telecentric optics technology |
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| CN115144404A true CN115144404A (en) | 2022-10-04 |
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| CN202211059823.2A Pending CN115144404A (en) | 2022-09-01 | 2022-09-01 | Vision measuring instrument based on telecentric optics technology |
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