CN111156897A - Automatic detection platform based on machine vision - Google Patents
Automatic detection platform based on machine vision Download PDFInfo
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- CN111156897A CN111156897A CN202010004299.3A CN202010004299A CN111156897A CN 111156897 A CN111156897 A CN 111156897A CN 202010004299 A CN202010004299 A CN 202010004299A CN 111156897 A CN111156897 A CN 111156897A
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- 238000001514 detection method Methods 0.000 title claims abstract description 85
- 230000007246 mechanism Effects 0.000 claims abstract description 127
- 239000013589 supplement Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
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Abstract
The invention provides an automatic detection platform based on machine vision, which comprises a workpiece conveyor belt mechanism, wherein a detection platform is arranged between an upper belt and a lower belt of the workpiece conveyor belt mechanism, an electric turntable is arranged on the detection platform, and a first electromagnet is arranged on the electric turntable; a vertical frame is arranged on the detection platform and positioned on one side of an upper belt of the workpiece conveyor belt mechanism, a side-looking machine vision size detection mechanism is arranged on the vertical frame, a transverse frame transversely suspended above the upper belt of the workpiece conveyor belt mechanism is arranged at the top of the vertical frame, and an upper-looking machine vision size detection mechanism is arranged on the transverse frame; the workpiece removing and conveying mechanism is positioned above the workpiece conveying mechanism in a crossing mode. This application simple structure can once only measure and detect all data of work piece length width height to accomplish and sort and reject the unqualified work piece of size, improved automatic detection degree.
Description
Technical Field
The invention relates to the technical field of detection, in particular to an automatic detection platform based on machine vision.
Background
At present, the measurement of a plurality of small workpieces in domestic industry mainly depends on manual measurement of tools such as a micrometer and a vernier caliper by workers, and in addition, the measurement also depends on some foreign machine vision equipment. The former has the disadvantages of labor consumption, large relation between the precision of manual measurement and the proficiency and fatigue of operators, easy error detection, missed detection and the like, and moreover, the manual detection of each index requires the operation of a measuring tool once, and if the condition of multi-index measurement is met, the measurement efficiency is greatly reduced. The latter has the disadvantages that the imported equipment is large, the structure is complex, the price is expensive, and certain trouble is caused to cost control. At present, small workpiece machine visual detection equipment similar to that at abroad exists at home, but most of the small workpiece machine visual detection equipment adopts one-way detection and can only measure the front size of a workpiece at one time. The cuboid workpiece is taken as an example, all data of length, width and height can not be measured at one time, so that the further improvement of the measurement efficiency is also hindered, the existing machine vision detection equipment can not sort the workpieces with unqualified sizes, and the automation degree is lower.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an automatic detection platform based on machine vision.
The invention is realized by the following technical scheme:
the invention provides an automatic detection platform based on machine vision, which comprises: the detection platform is arranged between an upper belt and a lower belt of the workpiece conveyor belt mechanism, the detection platform is provided with an electric turntable, the electric turntable is provided with a first electromagnet, and the top of the first electromagnet is in contact with the bottom of the upper belt of the workpiece conveyor belt mechanism;
a vertical frame is arranged on the detection platform and positioned on one side of an upper belt of the workpiece conveyor belt mechanism, a side-looking machine vision size detection mechanism for detecting the side size information of the workpiece is arranged on the vertical frame, a transverse frame transversely suspended above the upper belt of the workpiece conveyor belt mechanism is arranged at the top of the vertical frame, and an upper-looking machine vision size detection mechanism for detecting the front size information of the workpiece is arranged on the transverse frame; also comprises
The workpiece removing and conveying mechanism stretches across and is located above the workpiece conveying mechanism, a second electromagnet is fixedly arranged above a lower belt of the workpiece removing and conveying mechanism, the bottom of the second electromagnet is in contact with the top of the lower belt of the workpiece removing and conveying mechanism, and the second electromagnet stretches across the workpiece conveying mechanism.
Preferably, the vertical frame is arranged corresponding to the electric turntable, and a photoelectric sensor is arranged on the vertical frame; the industrial control host machine is in signal connection with the first controller and the second controller respectively.
Preferably, the industrial personal computer is further in signal connection with the side-view machine vision size detection mechanism and the top-view machine vision size detection mechanism respectively; the workpiece removing and conveying mechanism is connected with the workpiece removing and conveying mechanism through a first electromagnet signal, the second electromagnet signal is connected with a second controller through a second electromagnet signal, and the third controller is connected with the industrial control host through a signal.
Preferably, look sideways at machine vision size detection mechanism for shoot the direction be on a parallel with work piece conveyer belt mechanism look sideways at industrial camera, erect and put up and lie in look sideways at machine vision size detection mechanism's outer periphery and be provided with the round LED light filling lamp source that looks sideways at.
Preferably, the upward-looking machine vision size detection mechanism is an upward-looking industrial camera with the shooting direction perpendicular to the workpiece conveyor belt mechanism, and an upward-looking LED light supplement lamp source is arranged on the cross frame and located on the outer periphery of the upward-looking machine vision size detection mechanism.
Preferably, the length of the second electromagnet is smaller than the length of an upper belt and a lower belt of the workpiece removing and conveying mechanism, and the workpiece removing and conveying mechanism is located on the rear side of the vertical frame.
In the embodiment, this application simple structure can once only measure and detect all data of work piece length width height to accomplish sorting the rejection to the unqualified work piece of size, improved automatic detection degree.
Drawings
FIG. 1 is a schematic structural diagram of an automatic inspection platform based on machine vision according to an embodiment of the present invention;
FIG. 2 is a right side view of FIG. 1 provided by an embodiment of the present invention;
fig. 3 is a connection block diagram of a control principle provided by the embodiment of the present invention.
In the figure: 1-a workpiece conveyor belt mechanism; 2-detection platform; 3, an electric turntable; 4-a first electromagnet; 5-vertical frame; 6-side-looking machine vision size detection mechanism; 7-a transverse frame; 8-upward-looking machine vision size detection mechanism; 9-workpiece removing and conveying belt mechanism; 10-a second electromagnet; 11-a photosensor; 12-a first controller; 13-a second controller; 14-an industrial control host; 15-third controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to facilitate understanding of the automatic detection platform based on machine vision provided by the embodiment of the invention, an application scenario of the automatic detection platform based on machine vision provided by the embodiment of the invention is described first.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an automatic detection platform based on machine vision according to an embodiment of the present invention.
As shown in fig. 1, the automatic detection platform based on machine vision comprises a workpiece conveyor belt mechanism 1, wherein the workpiece conveyor belt mechanism 1 is used for conveying a workpiece after the workpiece is placed on the top surface of an upper belt of the workpiece conveyor belt mechanism 1. In the present embodiment, the detection platform 2 is disposed between the upper and lower belts of the work conveyor mechanism 1, and the detection platform 2 is disposed across between the upper and lower belts of the work conveyor mechanism 1.
In this embodiment, the mechanism for detecting the workpiece conveyed on the workpiece conveyor belt mechanism 1 includes a side-view machine vision dimension detection mechanism 6 and an upper-view machine vision dimension detection mechanism 8, the side-view machine vision dimension detection mechanism 6 is used for detecting the side dimension information of the workpiece, and the upper-view machine vision dimension detection mechanism 8 is used for detecting the front dimension information of the workpiece.
In specific arrangement, please refer to fig. 2, fig. 2 is a right side view of fig. 1 according to an embodiment of the present invention, a vertical frame 5 is disposed on the detection platform 2 at one side of the upper belt of the workpiece conveyor mechanism 1, a side-view machine vision size detection mechanism 6 is disposed on the vertical frame 5, a horizontal frame 7 transversely suspended above the upper belt of the workpiece conveyor mechanism 1 is disposed on the top of the vertical frame 5, and an upper-view machine vision size detection mechanism 8 is disposed on the horizontal frame 7. The junction of the crossbars 7 and the uprights 5 is hidden from view in figure 2.
In this embodiment, look sideways at machine vision dimension detection mechanism 6 and be the industrial camera that looks sideways that shoots the direction and be on a parallel with work piece conveyer belt mechanism 1 to the outer periphery that lies in looking sideways at machine vision dimension detection mechanism 6 on erectting frame 5 is provided with the side-looking LED light filling lamp source of a round. This application sets up one and looks sideways at machine vision size detection mechanism 6, can practice thrift preparation and purchasing cost to a certain extent. In addition, the upward-looking machine vision size detection mechanism 8 is an upward-looking industrial camera with the shooting direction perpendicular to the workpiece conveyor belt mechanism 1, and an upward-looking LED light supplement lamp source is arranged on the cross frame 7 and located on the outer periphery of the upward-looking machine vision size detection mechanism 8.
In the present embodiment, the vertical frame 5 is provided corresponding to the electric turntable 3, and the photoelectric sensor 11 is provided on the vertical frame 5, and the photoelectric sensor 11 is used for detecting the moving position information of the workpiece conveyed on the workpiece conveyor belt mechanism 1. In addition, the present application further includes a first controller 12 and an industrial control host 14, please refer to fig. 3, where the first controller 12 is in signal connection with the photoelectric sensor 11 and the workpiece conveyor belt mechanism 1, respectively, and the industrial control host 14 is in signal connection with the first controller 12. The industrial personal computer 14 is also in signal connection with the side-looking machine vision dimension detection mechanism 6 and the top-looking machine vision dimension detection mechanism 8 respectively.
In this embodiment, the first controller 12 is a single chip controller used for automatic control in the prior art, and the industrial control host 14 is an upper computer in the prior art. During the use, the work piece is placed and is conveyed on work piece conveyer belt mechanism 1, and when photoelectric sensor 11 detected that the work piece conveys 5 positions of erectting on work piece conveyer belt mechanism 1, industrial control host 14 sent control command, stopped the conveying through first controller 12 control work piece conveyer belt mechanism 1, then looked sideways at machine vision size detection mechanism 6 and looked upward machine vision size detection mechanism 8 and shot the detection to the work piece.
Industrial control host computer 14 looks sideways at machine vision size detection mechanism 6 and looks up 8 machine vision size detection mechanisms of accomplishing the back of once shooing of looking sideways at, because this application is based on practicing thrift the cost of manufacture purpose and has set up one and has looked sideways at machine vision size detection mechanism 6, for making the side that looks sideways at that sets up machine vision size detection mechanism 6 can once take a picture the detection with the side of work piece is whole, this application is provided with electric turntable 3 on testing platform 2, be provided with first electro-magnet 4 on electric turntable 3, the bottom of the last belt of first electro-magnet 4 top and work piece conveyer belt mechanism 1 contacts.
For convenience of control, the system further comprises a second controller 13, the second controller 13 is a single chip microcomputer controller used for playing a role in automatic control in the prior art, as shown in fig. 3, the second controller 13 is in signal connection with the first electromagnet 4 and the electric rotating disc 3 respectively, and the industrial control host 14 is in signal connection with the second controller 13. After setting up like this, look sideways at machine vision size detection mechanism 6 and accomplish the back of shooing for the first time to the work piece, industrial control host computer 14 is through sending control command to second controller 13 and controlling first electro-magnet 4 and electric rotary table 3 through second controller 13 and start simultaneously, can adsorb the work piece after first electro-magnet 4 circular telegram starts, electric rotary table 3 circular telegram starts can drive first electro-magnet 4 rotatoryly, thereby make the work piece rotate together, and then through looking sideways at machine vision size detection mechanism 6 and accomplish the shooting of whole sides to the work piece.
Further, the upward-looking machine vision size detection mechanism 8 transmits a detected size result of the front face of the workpiece to the industrial control host 14, meanwhile, the lateral-looking machine vision size detection mechanism 6 transmits a detected size result of the side face of the workpiece to the industrial control host 14, then the industrial control host 14 judges whether the workpiece is qualified or not, and meanwhile, the industrial control host 14 controls the first electromagnet 4 and the electric rotary table 3 to stop through the second controller 13 respectively and controls the workpiece conveyor belt mechanism 1 to restart transmission through the first controller 12.
In this embodiment, in order to remove the detected unqualified workpiece from the workpiece conveyor belt mechanism 1, as shown in fig. 1 and fig. 2, the present application further includes a workpiece removing conveyor belt mechanism 9 stretching over the workpiece conveyor belt mechanism 1, and the workpiece removing conveyor belt mechanism 9 is located at the rear side of the vertical frame 5. A second electromagnet 10 is fixedly arranged above a lower belt of the workpiece removing and conveying mechanism 9, the bottom of the second electromagnet 10 is in contact with the top of the lower belt of the workpiece removing and conveying mechanism 9, the second electromagnet 10 stretches across the workpiece conveying mechanism 1, and meanwhile, the length of the second electromagnet 10 is smaller than that of the upper belt and the lower belt of the workpiece removing and conveying mechanism 9.
In order to control the workpiece removing and conveying belt mechanism 9 conveniently, the workpiece removing and conveying belt mechanism further comprises a third controller 15, the third controller 15 is a single chip microcomputer controller used for playing a role in automatic control in the prior art, as shown in fig. 3, the third controller 15 is in signal connection with the workpiece removing and conveying belt mechanism 9 and the second electromagnet 10 respectively, and the third controller 15 is further in signal connection with an industrial control host 14.
When the industrial control host 14 judges that the workpiece is an unqualified product according to the photographing detection result, the industrial control host 14 controls the workpiece rejecting conveyor mechanism 9 and the second electromagnet 10 to start through the third controller 15, the workpiece is continuously conveyed after the photographing detection is finished, and is adsorbed by the second electromagnet 10 when conveyed to the position below the workpiece rejecting conveyor mechanism 9, so that the workpiece is separated from the workpiece conveyor mechanism 1, adsorbed on the surface of the lower belt of the workpiece rejecting conveyor mechanism 9 and conveyed to the outer side of the conveying track of the workpiece conveyor mechanism 1 by the workpiece rejecting conveyor mechanism 9, specifically, the conveying direction of the workpiece rejecting conveyor mechanism 9 is different from and perpendicular to the conveying direction of the workpiece conveyor mechanism 1, and since the length of the second electromagnet 10 is smaller than the lengths of the upper and lower belts of the workpiece rejecting conveyor mechanism 9, after the workpiece is conveyed out of the conveying track of the workpiece conveyor mechanism 1, the workpiece is rejected, the conveying belt mechanism 9 is continuously conveyed and is not adsorbed by the second electromagnet 10, and the workpiece falls on the detection platform 2 outside the workpiece conveying belt mechanism 1 to collect unqualified workpieces.
In order to facilitate faster and more timely control of the second electromagnet 10 and the workpiece rejecting conveyor belt mechanism 9 to be closed, when the second electromagnet 10 is arranged, a pressure sensor can be embedded at the bottom of the second electromagnet 10 along the length direction of the second electromagnet 10, the pressure sensor is configured to be in signal connection with a third controller 15, when the second electromagnet 10 adsorbs a workpiece through a lower belt of the rejecting conveyor belt mechanism 9, the pressure sensor generates a pressure signal, the pressure sensor is not enabled to generate the pressure signal any more after the workpiece is detached, so that the second electromagnet 10 and the workpiece rejecting conveyor belt mechanism 9 are controlled to be closed timely and quickly through the third controller 15, and normal conveying of the workpiece conveyor belt mechanism 1 to qualified workpieces cannot be influenced.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A machine vision based automated inspection platform comprising: the workpiece conveyor belt mechanism is characterized in that a detection platform is arranged between an upper belt and a lower belt of the workpiece conveyor belt mechanism, an electric turntable is arranged on the detection platform, a first electromagnet is arranged on the electric turntable, and the top of the first electromagnet is in contact with the bottom of the upper belt of the workpiece conveyor belt mechanism;
a vertical frame is arranged on the detection platform and positioned on one side of an upper belt of the workpiece conveyor belt mechanism, a side-looking machine vision size detection mechanism for detecting the side size information of the workpiece is arranged on the vertical frame, a transverse frame transversely suspended above the upper belt of the workpiece conveyor belt mechanism is arranged at the top of the vertical frame, and an upper-looking machine vision size detection mechanism for detecting the front size information of the workpiece is arranged on the transverse frame; also comprises
The workpiece removing and conveying mechanism stretches across and is located above the workpiece conveying mechanism, a second electromagnet is fixedly arranged above a lower belt of the workpiece removing and conveying mechanism, the bottom of the second electromagnet is in contact with the top of the lower belt of the workpiece removing and conveying mechanism, and the second electromagnet stretches across the workpiece conveying mechanism.
2. The automatic detection platform based on machine vision according to claim 1, characterized in that the vertical frame is arranged corresponding to the electric turntable, and a photoelectric sensor is arranged on the vertical frame; the industrial control host machine is in signal connection with the first controller and the second controller respectively.
3. The machine-vision-based automatic detection platform as claimed in claim 2, wherein the industrial personal computer is further in signal connection with the side-view machine-vision dimension detection mechanism and the top-view machine-vision dimension detection mechanism, respectively; the workpiece removing and conveying mechanism is connected with the workpiece removing and conveying mechanism through a first electromagnet signal, the second electromagnet signal is connected with a second controller through a second electromagnet signal, and the third controller is connected with the industrial control host through a signal.
4. The automatic detection platform based on machine vision of claim 1, wherein the side-looking machine vision dimension detection mechanism is a side-looking industrial camera with a shooting direction parallel to the workpiece conveyor belt mechanism, and a circle of side-looking LED light supplement lamp sources are arranged on the vertical frame and located on the outer periphery of the side-looking machine vision dimension detection mechanism.
5. The automatic detection platform based on machine vision according to claim 1, wherein the upward-looking machine vision size detection mechanism is an upward-looking industrial camera with a shooting direction perpendicular to the workpiece conveyor belt mechanism, and an upward-looking LED light supplement lamp source is arranged on the cross frame and located on the outer periphery of the upward-looking machine vision size detection mechanism.
6. The machine vision based automated inspection platform of claim 1, wherein the length of the second electromagnet is less than the length of the upper and lower belts of the work rejection conveyor mechanism, the work rejection conveyor mechanism being located at the rear side of the vertical shelf.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010004299.3A CN111156897A (en) | 2020-01-03 | 2020-01-03 | Automatic detection platform based on machine vision |
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| CN202010004299.3A CN111156897A (en) | 2020-01-03 | 2020-01-03 | Automatic detection platform based on machine vision |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112495820A (en) * | 2020-11-30 | 2021-03-16 | 桂林电子科技大学 | Product detection device based on machine vision |
| CN113276162A (en) * | 2021-05-25 | 2021-08-20 | 东莞理工学院 | Robot fault diagnosis test platform with adjustable structure |
| CN113390874A (en) * | 2021-07-01 | 2021-09-14 | 昆山宸泽测控科技有限公司 | Radium-shine solder joint AOI vision test equipment |
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