CN113267566A - AOI automatic glue pouring inspection system and inspection method - Google Patents
AOI automatic glue pouring inspection system and inspection method Download PDFInfo
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- CN113267566A CN113267566A CN202110739511.5A CN202110739511A CN113267566A CN 113267566 A CN113267566 A CN 113267566A CN 202110739511 A CN202110739511 A CN 202110739511A CN 113267566 A CN113267566 A CN 113267566A
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- 239000003292 glue Substances 0.000 title claims abstract description 47
- 238000007689 inspection Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 51
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 230000001502 supplementing effect Effects 0.000 claims description 11
- 238000004458 analytical method Methods 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 238000007405 data analysis Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 abstract description 19
- 230000001070 adhesive effect Effects 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000035515 penetration Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 133
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000005571 horizontal transmission Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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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
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
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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
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
Abstract
The invention relates to an AOI automatic glue filling inspection system and an inspection method, wherein a transmission unit inputs a to-be-inspected glue sealing product and outputs the to-be-inspected glue sealing product after the inspection is finished, an image acquisition unit acquires a three-dimensional data map of the to-be-inspected glue sealing product, a bubble positioning unit judges whether the to-be-inspected glue sealing product has bubbles, and a detection bin is arranged by matching with the transmission unit, the image acquisition unit and the bubble positioning unit so as to control the unit. The invention uses the bubble positioning unit to penetrate the adhesive sealing product to check whether bubbles are generated, uses the image acquisition unit to scan the adhesive sealing product, and uses the camera to take a picture to obtain the three-dimensional view and the coordinates, thereby forming a simulated three-dimensional figure of the product, and the position of the bubbles identified by ultrasonic penetration is combined with the formed three-dimensional figure, so that the position of the bubbles can be accurately positioned. The invention is beneficial to reducing the reject ratio of products, accurately identifying and positioning the position of the bubble, eliminating the bubble by operating personnel, improving the quality of the products and reducing the production cost.
Description
Technical Field
The invention relates to the technical field of testing or analyzing materials by means of measuring chemical or physical properties of the materials, in particular to an AOI automatic glue pouring inspection system and an inspection method.
Background
AOI (Automated Optical Inspection) refers to the automatic detection of common problems in welding production using Optical principles.
With the development of science and technology and the increasing demand of electronic products, people have higher and higher requirements on the electronic products, and in order to prolong the service life of the electronic products, glue filling is generally adopted in production so as to reduce the damage of the external environment to the electronic products.
The glue pouring machine is also called as AB glue pouring machine, glue is covered on the surface of a product or inside the product in the modes of filling, coating, spot coating and the like, and the service life and the performance of the product are improved in the glue pouring mode. However, the glue filling machine can generate bubbles with different sizes in the glue sealing process, some larger bubbles can be identified manually, whether the bubbles are eliminated can be judged by naked eyes when the bubbles are removed, but in addition, the micro bubbles can be left in the product after being cured, when the product runs to generate heat, the bubbles left in the product can greatly influence the product performance and the service life, and simultaneously the production quality of the product can be reduced, at the moment, if the bubbles are still judged manually, the manual inspection mode is easily influenced by factors such as environment, human subjective state and the like, and further the phenomena of missed inspection and repeated inspection can be caused in the inspection process, the micro bubbles can be really difficultly found only by manual visual inspection, the manual inspection not only reduces the production progress of the product, increases human resources, but also reduces the production quality of the product, the failure rate of the electronic product is increased.
Disclosure of Invention
The invention solves the problems in the prior art and provides an optimized AOI automatic glue-pouring inspection system and an inspection method.
The invention adopts the technical scheme that an AOI automatic glue pouring inspection system comprises:
the transmission unit is used for inputting the glue sealing product to be detected and outputting the glue sealing product after the detection is finished;
the image acquisition unit is matched with the transmission unit and used for acquiring a three-dimensional data image of the glue-sealed product to be detected;
the bubble positioning unit is matched with the transmission unit and arranged behind the image acquisition unit and is used for judging whether the glue-sealed product to be detected has bubbles;
the detection bin is arranged in cooperation with the image acquisition unit and the bubble positioning unit and is arranged in cooperation with the transmission unit;
and a control unit is arranged in cooperation with the transmission unit, the image acquisition unit and the bubble positioning unit.
Preferably, the image acquisition unit includes:
the scanner is arranged at the front end of the detection bin and used for scanning the to-be-detected glue-sealed product and obtaining a three-dimensional coordinate corresponding to the to-be-detected glue-sealed product;
at least 2 cameras, which are arranged in the detection bin; the camera is arranged on the inner side wall of the detection bin, faces the glue-sealed product to be detected and is used for obtaining a side view of the glue-sealed product to be detected; the other camera is arranged at the top of the inner side of the detection bin, faces the to-be-detected glue-sealed product and is used for obtaining a top view of the to-be-detected glue-sealed product;
the scanner and the camera are arranged in cooperation with the control unit.
Preferably, the bubble positioning unit comprises an ultrasonic generator which is arranged at the top of the inner side of the detection bin and faces the glue sealing product to be detected, and a sound wave receiver is arranged at the bottom of a transmission unit corresponding to the ultrasonic generator; the ultrasonic generator and the sound wave receiver are matched with the control unit.
Preferably, the transmission unit includes horizontal conveyor, and the cooperation horizontal conveyor is equipped with the action wheel and follows the driving wheel, and the cooperation the action wheel is equipped with the motor, the motor sets up with the control unit cooperation.
Preferably, the detection system further comprises:
the position adjusting unit is arranged in front of the image acquisition unit on the outer side of the transmission unit in a matched mode and used for adjusting the position of the glue-sealed product to be detected and enabling one side of the glue-sealed product facing the image acquisition unit to be vertical to the transmission direction of the transmission unit;
the position adjusting unit is matched with the control unit.
Preferably, the detection system further comprises:
the light supplementing mechanism is arranged in the detection bin and used for supplementing light for image acquisition;
the light supplementing mechanism is matched with the control unit.
Preferably, the control unit includes:
the data analysis module is used for analyzing a three-dimensional data image and bubble positioning information obtained after the image acquisition unit and the bubble positioning unit work to form a simulated three-dimensional image and a waveform image;
the memory is used for storing data and images required by analysis and simultaneously storing a simulated three-dimensional stereogram and a waveform chart obtained by analysis;
and an upper computer.
An inspection method of the AOI automatic glue-pouring inspection system comprises the following steps:
step 1: setting inspection parameters and establishing a comparison standard;
step 2: the image acquisition unit and the bubble positioning unit acquire data of a to-be-detected glue sealing product and transmit the data to the control unit; the control unit judges whether the currently to-be-detected glue-sealed product has bubbles;
and step 3: and outputting a test result.
Preferably, in the step 1, a gray three-dimensional perspective view of the standard glue-sealed product and a signal waveform view of the standard glue-sealed product after bubble positioning are obtained and stored in a memory.
Preferably, the step 2 comprises the steps of:
step 2.1: the position adjusting unit works, and the edge of the to-be-detected glue seal product, which faces the image acquisition unit, is vertical to the transmission direction of the transmission unit;
step 2.2: the image acquisition unit acquires a simulated stereogram:
the image acquisition unit scans the to-be-detected glue seal product, establishes a three-dimensional coordinate system by taking a first scanned edge of the to-be-detected glue seal product as a reference axis and taking an end point or a central point of the edge as an origin, and generates a three-dimensional coordinate file; the image acquisition unit acquires a gray three-view image of a to-be-detected glue seal product and combines with a three-dimensional coordinate obtained by scanning to form a simulated stereogram;
step 2.3: the bubble positioning unit acquires a signal oscillogram:
calculating the time when the first scanned edge of the glue-sealed product to be detected reaches the bubble positioning unit, transmitting penetrating ultrasonic waves to the glue-sealed product to be detected by the bubble positioning unit at the time, and receiving signal change data after the ultrasonic waves penetrate through the glue-sealed product to be detected to form a signal oscillogram;
step 2.4: the analysis results in data:
the control unit calls a comparison standard, compares a standard signal oscillogram with the result obtained in the step 2.2, if no abnormal frequency band exists, the glue seal product to be detected is normal, and the step 3 is carried out, otherwise, the glue seal product to be detected has bubbles, and is combined with the simulated stereogram collected in the step 2.1 to generate a simulated stereogram with the bubbles;
step 2.5: and performing post-treatment on the glue-sealed product based on the current position of the air bubble.
The invention relates to an optimized AOI automatic glue filling inspection system and an inspection method, wherein a to-be-inspected glue-sealed product is input through a transmission unit and output after the inspection is finished, an image acquisition unit is matched with the transmission unit to obtain a three-dimensional data map of the to-be-inspected glue-sealed product, a bubble positioning unit is matched with the transmission unit to judge whether the to-be-inspected glue-sealed product has bubbles, and a detection bin is arranged by matching with the transmission unit, the image acquisition unit and the bubble positioning unit and is controlled by a control unit.
The invention checks whether bubbles are generated or not by the bubble positioning unit penetrating through the adhesive sealed product, and simultaneously scans the adhesive sealed product by using the image acquisition unit and obtains three views and coordinates by taking a picture by using the camera, thereby forming a simulated three-dimensional figure of the product.
The invention is beneficial to reducing the reject ratio of products, accurately identifying and positioning the position of the bubble, eliminating the bubble by operating personnel, improving the quality of the products and reducing the production cost.
Drawings
FIG. 1 is a schematic side view of the present invention;
FIG. 2 is a flow chart of the detection method of the present invention;
FIG. 3 is a schematic side view showing the structure of embodiment 1 of the present invention;
fig. 4 is a schematic top view of embodiment 2 of the present invention.
Detailed Description
The present invention is described in further detail with reference to the following examples, but the scope of the present invention is not limited thereto.
The invention relates to an AOI automatic glue-pouring inspection system, which comprises:
the transmission unit is used for inputting the glue-sealed product 1 to be detected and outputting the glue-sealed product after detection is finished;
the transmission unit comprises a horizontal transmission belt 2, the horizontal transmission belt 2 is provided with a driving wheel 3 and a driven wheel (not shown in the figure), the driving wheel 3 is provided with a motor (not shown in the figure), and the motor is matched with the control unit.
In the present invention, the transmission unit is conventional in the art, and those skilled in the art can set the transmission unit according to the requirement.
The image acquisition unit is matched with the transmission unit and used for acquiring a three-dimensional data image of the glue-sealed product 1 to be detected;
the image acquisition unit includes:
the scanner 4 is arranged at the front end of the detection bin 5 and used for scanning the glue-sealed product 1 to be detected and obtaining the three-dimensional coordinate corresponding to the glue-sealed product 1 to be detected;
at least 2 cameras 6 arranged in the detection bin 5; the camera 6 is arranged at the inner side wall of the detection bin 5 and faces the glue-sealed product 1 to be detected, and is used for obtaining a side view of the glue-sealed product 1 to be detected; the other camera 6 is arranged at the top of the inner side of the detection bin 5 and faces the to-be-detected glue-sealed product 1, and is used for obtaining a top view of the to-be-detected glue-sealed product 1;
the scanner 4 and camera 6 are arranged in cooperation with a control unit.
In the invention, the image acquisition unit scans the to-be-detected adhesive-sealed product 1, acquires the image of the to-be-detected adhesive-sealed product 1, obtains the coordinate of the to-be-detected adhesive-sealed product 1 through infrared scanning, and forms a three-dimensional stereo image according to the coordinate and the image.
In the invention, a scanner 4, generally an infrared scanner, is used for scanning the to-be-detected adhesive sealed product 1 and obtaining three-dimensional coordinates of the to-be-detected adhesive sealed product 1, a high-definition camera 6 is used for grabbing three gray-level views of the to-be-detected adhesive sealed product 1, and the obtained images are uploaded to a data analysis system for integration processing, so that whether bubbles exist is detected; the infrared scanner 4 is arranged at an inlet of the image acquisition unit, and the two cameras 6 are respectively arranged at the rear of the infrared scanner 4 and right above the horizontal conveyor belt 2 and are respectively used for grabbing a gray side view, a gray front view and a top view of a glue sealing product.
The bubble positioning unit is matched with the transmission unit and arranged behind the image acquisition unit and used for judging whether the glue-sealed product 1 to be detected has bubbles;
the bubble positioning unit comprises an ultrasonic generator 7 which is arranged at the top of the inner side of the detection bin 5 and faces the glue-sealed product 1 to be detected, and a sound wave receiver 8 is arranged at the bottom of a transmission unit corresponding to the ultrasonic generator 7; the ultrasonic generator 7 and the acoustic receiver 8 are arranged in cooperation with the control unit.
In the invention, the bubble positioning unit can be regarded as adopting the principle of sound positioning, the ultrasonic generator 7 sends ultrasonic waves to the product to obtain the time change rule that the ultrasonic waves penetrate through the glue-sealed product 1 to be detected, and the sound wave analog signals are converted into digital voltage signals to form a voltage waveform diagram; generally speaking, the ultrasonic generator 7 is arranged above the adhesive sealed product 1 to be detected, the acoustic wave receiver 8 is arranged below the adhesive sealed product 1 to be detected, the ultrasonic generator 7 emits ultrasonic waves to the adhesive sealed product 1 to be detected, the ultrasonic waves penetrate through the adhesive sealed product 1 to be detected and then reach the acoustic wave receiver 8, the acoustic wave receiver 8 is used for receiving analog signals of acoustic wave attenuation when the ultrasonic waves penetrate through the adhesive sealed product 1 to be detected and converting the received analog signals into digital voltage signals, a voltage signal waveform diagram is formed according to the receiving time of the signals, whether bubbles exist in the adhesive sealed product 1 to be detected is judged according to the obtained voltage waveform diagram, and the voltage signal waveform diagram formed by the existence of the bubbles is obviously different from the waveform diagram without the bubbles.
In the invention, for better control and detection, the bubble positioning unit is arranged behind the image acquisition unit, namely, the bubble positioning is completely carried out after the modeling is finished.
The detection bin 5 is arranged by matching with the image acquisition unit and the bubble positioning unit, and the detection bin 5 is arranged by matching with the transmission unit;
and a control unit is arranged in cooperation with the transmission unit, the image acquisition unit and the bubble positioning unit.
The control unit includes:
the data analysis module is used for analyzing a three-dimensional data image and bubble positioning information obtained after the image acquisition unit and the bubble positioning unit work to form a simulated three-dimensional image and a waveform image;
the memory is used for storing data and images required by analysis and simultaneously storing a simulated three-dimensional stereogram and a waveform chart obtained by analysis;
and an upper computer.
In the invention, the upper computer is used for compiling software and simultaneously setting the inspection parameters of the inspection system.
In the invention, a data analysis module is used for processing and analyzing a received oscillogram generated when ultrasonic waves penetrate through a to-be-detected adhesive-sealed product 1 and a figure obtained by photographing, forming a simulated three-dimensional stereogram and an ultrasonic wave penetration oscillogram by using a three-view image and a coordinate file of the to-be-detected adhesive-sealed product 1, marking the positions of bubbles on the simulated three-dimensional stereogram by combining a three-dimensional stereogram and the oscillogram, and displaying the formed simulated three-dimensional stereogram and the ultrasonic wave penetration oscillogram in an upper computer.
In the invention, the control unit further comprises a communication module for completing data transmission between the upper computer and the data analysis system, and generally, the communication system can transmit data in a mode including but not limited to WiFi, serial ports, USB data lines and the like.
The detection system further comprises:
the position adjusting unit is arranged in front of the image acquisition unit on the outer side of the transmission unit in a matched mode and used for adjusting the position of the glue-sealed product 1 to be detected and enabling one side of the glue-sealed product, which faces the image acquisition unit, to be vertical to the transmission direction of the transmission unit;
the position adjusting unit is matched with the control unit.
In the invention, in order to facilitate the image acquisition unit to construct the simulated three-dimensional stereogram, the position adjusting unit is arranged in front of the image acquisition unit, and can be set into various types.
Embodiment mode 1
The position adjusting unit is set to be a blocking rod/plate 9, when the to-be-detected glue-sealed product 1 is located at the position of the position adjusting unit, the blocking rod/plate 9 falls or is pushed out from the side edge, so that the edge/surface of the to-be-detected glue-sealed product 1 facing the image acquisition unit is positive, namely perpendicular to the transmission direction of the transmission unit, and the scanner 4 is convenient to position after entering the image acquisition unit; the lowering or pushing of the stop/plate 9 from the side can be controlled by various pneumatic or electric controls, which are conventional in the art and can be set by the skilled person as desired.
The embodiment 1 can be applied to medium and small adhesive-sealed products 1 to be detected, and is also applicable to the adhesive-sealed products 1 to be detected with irregular shapes and structures, and at least one side is perpendicular to the conveying direction of the conveying unit.
The position adjusting unit is provided with the propelling cylinders 10 on two sides of the transmission direction of the transmission unit, the output ends of the two propelling cylinders 10 are oppositely arranged and are controlled by the control unit and simultaneously pushed out, and the glue seal product 1 to be detected can be pushed to the forward image acquisition unit by the two propelling cylinders 10 regardless of whether being located on the transmission central axis of the transmission unit or not at the moment, so that the scanner 4 can be conveniently positioned after entering the image acquisition unit.
The embodiment 2 is more suitable for the larger and regular-shaped adhesive sealing product 1 to be detected.
The detection system further comprises:
the light supplementing mechanism is arranged in the detection bin 5 and used for supplementing light for image acquisition;
the light supplementing mechanism is matched with the control unit.
In the invention, the light supplementing mechanism is used for illuminating the to-be-detected adhesive sealed product 1 during inspection so that a camera can shoot clear three-view and gray level images of the to-be-detected adhesive sealed product 1; the light supplement mechanism generally comprises a lighting light group, and the lighting light group consists of a plurality of light emitting diodes 11 and is controlled by a control unit.
The invention also relates to an inspection method of the AOI automatic glue-pouring inspection system, which comprises the following steps:
step 1: setting inspection parameters and establishing a comparison standard;
in the step 1, a gray three-dimensional stereo image of the standard glue-sealed product and a signal oscillogram of the standard glue-sealed product after bubble positioning are obtained and stored in a memory.
In the invention, the inspection parameters comprise the shooting range, the shooting pixels, the shooting angle and the like of the camera.
Step 2: the image acquisition unit and the bubble positioning unit acquire data of the to-be-detected glue sealing product 1 and transmit the data to the control unit; the control unit judges whether the currently to-be-detected glue-sealed product 1 has bubbles;
step 2.1: the position adjusting unit works, and the edge of the to-be-detected glue seal product 1 facing the image acquisition unit is vertical to the transmission direction of the transmission unit;
step 2.2: the image acquisition unit acquires a simulated stereogram:
the image acquisition unit scans the to-be-detected glue-sealed product 1, establishes a three-dimensional coordinate system by taking a first scanned edge of the to-be-detected glue-sealed product 1 as a reference axis and taking an end point or a central point of the edge as an origin, and generates a three-dimensional coordinate file; the image acquisition unit acquires a gray three-view image of the adhesive sealed product 1 to be detected, and the gray three-view image is combined with the three-dimensional coordinates obtained by scanning to form a simulated stereogram;
here, the reference axis refers to a reference axis of a three-dimensional coordinate system, such as an X-axis.
Step 2.3: the bubble positioning unit acquires a signal oscillogram:
calculating the time when the first scanned edge of the adhesive-sealed product 1 to be detected reaches the bubble positioning unit, transmitting penetrating ultrasonic waves to the adhesive-sealed product 1 to be detected by the bubble positioning unit at the time, and receiving signal change data after the ultrasonic waves penetrate through the adhesive-sealed product 1 to be detected to form a signal oscillogram;
step 2.4: the analysis results in data:
the control unit calls a comparison standard, compares a standard signal oscillogram with the result obtained in the step 2.2, if no abnormal frequency band exists, the glue seal product 1 to be detected is normal, and the step 3 is carried out, otherwise, the glue seal product 1 to be detected has air bubbles, and is combined with the simulated stereogram collected in the step 2.1 to generate a simulated stereogram with the air bubbles;
step 2.5: and performing post-treatment on the glue-sealed product based on the current position of the air bubble.
In the invention, in step 2.2, one or more groups of light supplementing mechanisms are selected according to requirements to irradiate on the glue-sealed product, the infrared scanner 4 in the image acquisition unit scans the tested glue-sealed product, at this time, the position adjustment unit processes the glue-sealed product 1 to be tested, so that the whole glue-sealed product 1 to be tested is positive, a three-dimensional coordinate file is conveniently constructed and generated, and the camera 6 captures a gray three-dimensional view of the glue-sealed product and combines with the three-dimensional coordinate obtained by scanning to form a simulated stereogram.
In the invention, in step 2.3, the bubble positioning unit transmits penetrating ultrasonic waves to the glue-sealed product and receives signal change data of the ultrasonic waves after penetrating through the glue-sealed product 1 to be detected to form a signal oscillogram.
In the invention, in step 2.4, the data analysis module in the control unit calls the standard oscillogram of the ultrasonic penetration product in the memory to compare with the received ultrasonic penetration signal oscillogram of the adhesive sealed product 1 to be detected, if an abnormal frequency band exists, the existence of bubbles is indicated, and then the data analysis module is combined with or matched with the acquired simulated stereogram to generate the simulated stereogram with the bubbles, so that the positions of the bubbles in the adhesive sealed product 1 to be detected can be simulated.
In the present invention, in step 2.5, if the position of the bubble does not affect the practical application, the glue seal product can be sent out after simple treatment known to those skilled in the art, and if the position of the bubble affects the application, the glue seal product needs to be discarded.
In the invention, after the step 2.5, the preset rule is continuously output to output the test result or give an alarm.
And step 3: and outputting a test result.
In the invention, based on the display processing result of the upper computer, the upper computer processes the received instruction set data to judge whether bubbles exist or not and displays the judgment result; and the upper computer displays the unqualified glue sealing products on the display panel according to the abnormal detection instruction, displays the simulated stereogram of the abnormal glue sealing products at the same time, and displays the qualified products if the abnormal frequency band does not exist.
The working principle of the invention is that when the to-be-detected glue-sealed product 1 after being adjusted in position reaches the scanner 4 through the horizontal conveyor belt 2, the first scanned edge of the to-be-detected glue-sealed product 1 is taken as a reference axis, the end point or the central point of the edge is taken as an original point, the scanner 4 scans the to-be-detected glue-sealed product 1 to obtain the three-dimensional coordinates of the product, meanwhile, the camera captures the gray-scale front view of the to-be-detected glue-sealed product 1, the gray-scale side view of the to-be-detected glue-sealed product 1 is obtained when the to-be-detected glue-sealed product 1 reaches the front part of the first camera 6 along with the horizontal conveyor belt 2, the top view of the to-be-detected glue-sealed product 1 is obtained when the second camera 6 is reached, and the three-dimensional coordinates of the to-be-detected glue-sealed product 1 are combined with the three-view and the scanner 4 to generate the simulated three-dimensional stereo view of the to-sealed product 1;
then the glue-sealed product 1 to be detected is transmitted to a bubble positioning unit, an ultrasonic generator 7 sends out ultrasonic waves, an acoustic receiver 8 collects analog signals of the ultrasonic waves which penetrate through the glue-sealed product 1 to be detected and arrives, converts the analog signals into digital voltage signals, and generates a penetrating acoustic wave oscillogram according to receiving time;
the image acquisition unit and the bubble positioning unit send the acquired sound wave oscillogram of the simulated three-dimensional stereogram to the control unit, the control unit judges whether an abnormal frequency band exists or not, the position of the bubble is positioned by combining the formed digital voltage oscillogram according to the time of the ultrasonic wave transmitting to penetrate through the glue-sealed product 1 to be detected and the length, width and height of the detected product, and black points or area marks are used in the formed simulated three-dimensional stereogram; the position of the air bubble is marked by a black point in the stereogram, the obtained stereogram is sent to an upper computer through a wireless communication system, and the upper computer judges whether the glue-sealed product 1 to be detected is qualified or not according to the product stereogram obtained by analysis.
Claims (10)
1. The utility model provides an automatic encapsulating inspection system of AOI which characterized in that: the detection system comprises:
the transmission unit is used for inputting the glue sealing product to be detected and outputting the glue sealing product after the detection is finished;
the image acquisition unit is matched with the transmission unit and used for acquiring a three-dimensional data image of the glue-sealed product to be detected;
the bubble positioning unit is matched with the transmission unit and arranged behind the image acquisition unit and is used for judging whether the glue-sealed product to be detected has bubbles;
the detection bin is arranged in cooperation with the image acquisition unit and the bubble positioning unit and is arranged in cooperation with the transmission unit;
and a control unit is arranged in cooperation with the transmission unit, the image acquisition unit and the bubble positioning unit.
2. The AOI automatic glue-pouring inspection system according to claim 1, wherein: the image acquisition unit includes:
the scanner is arranged at the front end of the detection bin and used for scanning the to-be-detected glue-sealed product and obtaining a three-dimensional coordinate corresponding to the to-be-detected glue-sealed product;
at least 2 cameras, which are arranged in the detection bin; the camera is arranged on the inner side wall of the detection bin, faces the glue-sealed product to be detected and is used for obtaining a side view of the glue-sealed product to be detected; the other camera is arranged at the top of the inner side of the detection bin, faces the to-be-detected glue-sealed product and is used for obtaining a top view of the to-be-detected glue-sealed product;
the scanner and the camera are arranged in cooperation with the control unit.
3. The AOI automatic glue-pouring inspection system according to claim 1, wherein: the bubble positioning unit comprises an ultrasonic generator which is arranged at the top of the inner side of the detection bin and faces the glue seal product to be detected, and a sound wave receiver is arranged at the bottom of a transmission unit corresponding to the ultrasonic generator; the ultrasonic generator and the sound wave receiver are matched with the control unit.
4. The AOI automatic glue-pouring inspection system according to claim 1, wherein: the transmission unit comprises a horizontal conveying belt, the horizontal conveying belt is provided with a driving wheel and a driven wheel, the driving wheel is provided with a motor, and the motor is matched with the control unit.
5. The AOI automatic glue-pouring inspection system according to claim 1, wherein: the detection system further comprises:
the position adjusting unit is arranged in front of the image acquisition unit on the outer side of the transmission unit in a matched mode and used for adjusting the position of the glue-sealed product to be detected and enabling one side of the glue-sealed product facing the image acquisition unit to be vertical to the transmission direction of the transmission unit;
the position adjusting unit is matched with the control unit.
6. The AOI automatic glue-pouring inspection system according to claim 1, wherein: the detection system further comprises:
the light supplementing mechanism is arranged in the detection bin and used for supplementing light for image acquisition;
the light supplementing mechanism is matched with the control unit.
7. The AOI automatic glue-pouring inspection system according to claim 1, wherein: the control unit includes:
the data analysis module is used for analyzing a three-dimensional data image and bubble positioning information obtained after the image acquisition unit and the bubble positioning unit work to form a simulated three-dimensional image and a waveform image;
the memory is used for storing data and images required by analysis and simultaneously storing a simulated three-dimensional stereogram and a waveform chart obtained by analysis;
and an upper computer.
8. An inspection method of the AOI automatic glue-pouring inspection system according to any one of claims 1 to 7, characterized in that: the inspection method comprises the following steps:
step 1: setting inspection parameters and establishing a comparison standard;
step 2: the image acquisition unit and the bubble positioning unit acquire data of a to-be-detected glue sealing product and transmit the data to the control unit; the control unit judges whether the currently to-be-detected glue-sealed product has bubbles;
and step 3: and outputting a test result.
9. The inspection method of the AOI automatic glue-pouring inspection system according to claim 8, wherein: in the step 1, a gray three-dimensional stereo image of the standard glue-sealed product and a signal oscillogram of the standard glue-sealed product after bubble positioning are obtained and stored in a memory.
10. The inspection method of the AOI automatic glue-pouring inspection system according to claim 8, wherein: the step 2 comprises the following steps:
step 2.1: the position adjusting unit works, and the edge of the to-be-detected glue seal product, which faces the image acquisition unit, is vertical to the transmission direction of the transmission unit;
step 2.2: the image acquisition unit acquires a simulated stereogram:
the image acquisition unit scans the to-be-detected glue seal product, establishes a three-dimensional coordinate system by taking a first scanned edge of the to-be-detected glue seal product as a reference axis and taking an end point or a central point of the edge as an origin, and generates a three-dimensional coordinate file; the image acquisition unit acquires a gray three-view image of a to-be-detected glue seal product and combines with a three-dimensional coordinate obtained by scanning to form a simulated stereogram;
step 2.3: the bubble positioning unit acquires a signal oscillogram:
calculating the time when the first scanned edge of the glue-sealed product to be detected reaches the bubble positioning unit, transmitting penetrating ultrasonic waves to the glue-sealed product to be detected by the bubble positioning unit at the time, and receiving signal change data after the ultrasonic waves penetrate through the glue-sealed product to be detected to form a signal oscillogram;
step 2.4: the analysis results in data:
the control unit calls a comparison standard, compares a standard signal oscillogram with the result obtained in the step 2.2, if no abnormal frequency band exists, the glue seal product to be detected is normal, and the step 3 is carried out, otherwise, the glue seal product to be detected has bubbles, and is combined with the simulated stereogram collected in the step 2.1 to generate a simulated stereogram with the bubbles;
step 2.5: and performing post-treatment on the glue-sealed product based on the current position of the air bubble.
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