CN113554588A - Product flaw detection device and method - Google Patents
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- G06T7/0004—Industrial image inspection
- G06T7/0008—Industrial image inspection checking presence/absence
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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Abstract
The application is suitable for the technical field of detection, and provides a device and a method for detecting product flaws. The detection device of product flaw includes: the device comprises a conveying module, a falling channel, a detection module and at least two camera devices, wherein the falling channel is of a hollow structure and is vertically arranged, and the at least two camera devices are arranged below an outlet of the falling channel and evenly surround the falling channel: the conveying module is used for conveying the products to the upper part of the inlet of the falling channel so as to enable the products to fall into the falling channel; the camera device is used for shooting the product falling out of the outlet of the falling channel to obtain an image of the product; the detection module is used for determining whether the product has defects according to the images obtained by the at least two camera devices respectively. The application provides a detection device of product flaw can improve the detection efficiency of product flaw.
Description
Technical Field
The application belongs to the technical field of detection, and particularly relates to a device and a method for detecting product flaws.
Background
In the production process of products, in order to ensure the product quality, the processed products need to be detected, so that the products with unqualified quality can be found and removed in time.
At present, a factory generally observes a product or an image of the product through naked eyes of a quality inspector to find the product with unqualified quality, but the defect detection efficiency of the product through the method is not high due to the problems that the crack of the product is small or the quality inspector is easy to have visual fatigue and the like.
Disclosure of Invention
The application provides a device and a method for detecting product flaws, which can improve the detection efficiency of the product flaws.
In a first aspect, an embodiment of the present application provides a device for detecting a product defect, including: the device comprises a conveying module, a falling channel, a detection module and at least two camera devices, wherein the falling channel is of a hollow structure and is vertically arranged, and the at least two camera devices are arranged below an outlet of the falling channel and evenly surround the falling channel:
the conveying module is used for conveying the products to the upper part of the inlet of the falling channel so as to enable the products to fall into the falling channel;
the camera device is used for shooting the product falling out of the outlet of the falling channel to obtain an image of the product;
the detection module is used for determining whether the product has defects according to the images obtained by the at least two camera devices respectively.
In a possible implementation manner of the first aspect, the apparatus further includes: a sensor module disposed above the at least two cameras:
the sensor module is used for detecting whether a product falls out of the falling channel or not and sending a shooting instruction to the at least two camera devices when the product is detected to fall out of the falling channel.
In one possible implementation manner of the first aspect, the sensor module is a correlation laser sensor.
In one possible implementation manner of the first aspect, the number of the image capturing devices is 4.
In a possible implementation manner of the first aspect, the device further includes an air supply module, and an air supply hole is formed in a side wall of the falling channel;
and the air supply module is used for generating air flow and blowing the air flow into the falling channel through the air supply hole so as to enable the product to rotate when falling in the falling channel.
In one possible implementation form of the first aspect, the drop passage comprises a socket and a through duct, both the socket and the through duct being of hollow structure;
the size of the inlet of the bearing part is larger than that of the outlet of the bearing part, the outlet of the bearing part is connected with the inlet of the straight-through pipeline, and the inner diameter size of the straight-through pipeline is larger than the maximum size of the product.
In a possible implementation manner of the first aspect, the detection module is specifically configured to:
identifying whether flaws exist in the images or not through an image processing algorithm aiming at the images shot by each camera device;
and if the flaw exists, acquiring the position coordinate of the flaw on the image.
In one possible implementation manner of the first aspect, the position coordinate is a position coordinate of a center point of the flaw.
In a possible implementation manner of the first aspect, the apparatus further includes a display, and the display is configured to:
displaying the image and displaying the flaw in the image.
In a second aspect, an embodiment of the present application provides a method for detecting a product defect, which is applied to a device for detecting a product defect of any one of the above first aspects, where the method includes:
when a product falls out of the outlet of the falling channel, the product is shot by the at least two camera devices respectively to obtain an image of the product;
and determining whether the product has defects according to the images obtained by the at least two camera devices respectively.
In a third aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method for detecting a product defect described in the second aspect is implemented.
The application provides a detection device and method of product flaw, through the orbit that the product that falls from conveying module continues to drop of whereabouts passageway restraint, ensure that the product falls out from the export of whereabouts passageway to ensure to set up the image pickup device that falls passageway export below can be smooth shoot the image of product, and then whether there is the flaw in the image through image processing algorithm discernment product, realize the automation of product flaw detection process, reduce manpower consumption, improve the detection efficiency of product flaw.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a product to be detected according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a detection apparatus provided in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of another detecting device provided in the embodiments of the present application;
FIG. 4 is a schematic structural diagram of a detection module provided in an embodiment of the present application;
FIG. 5 is a schematic diagram of an application provided by an embodiment of the present application;
FIG. 6 is a display interface provided by an embodiment of the present application;
FIG. 7 is a schematic structural view of a drop shaft provided in an embodiment of the present application;
FIG. 8 is a top plan view of the drop shaft of FIG. 7;
fig. 9 is a schematic flow chart of a detection method according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application 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 present application and are not intended to limit the present application. In the present application, different technical features may be combined with each other without conflict.
The detection device of product flaw that this application embodiment provided can be used for detecting the flaw of product. After the product is produced on the process flow line, a quality inspection process is carried out for removing the product with unqualified quality and keeping the product with qualified quality. Therefore, before products with unqualified quality are removed, the quality of the products needs to be detected through a product flaw detection device, so that whether the products are qualified or not is judged, and whether the products need to be removed or not is determined.
It should be noted that the application does not limit the type of the product to be detected. By way of example, fig. 1 is a schematic structural diagram of a product to be detected according to an embodiment of the present application, and the principle of the embodiment of the present application is described below by taking the product shown in fig. 1 as an example. The product in figure 1 is a bottle plug for a vacuum bottle, and in order to achieve a better heat preservation effect, the product is structurally larger at one end and smaller at the other end, so that the end is slightly heavier than the other end in weight distribution. Because the weights at the two ends of the bottle stopper are different, the bottle stopper can adjust the falling posture in the falling process under the influence of gravity, and the bottle stopper always keeps the standard downward falling posture with the heavier end after adjustment.
The following describes in detail a product defect detection device provided in an embodiment of the present application, with reference to the accompanying drawings, by taking a bottle stopper as an example.
Fig. 2 is a schematic structural diagram of a detection apparatus according to an embodiment of the present application. As shown in fig. 2, the apparatus for detecting product defects provided in the embodiment of the present application includes: a transport module 11, a drop shaft (not shown in fig. 2), a detection module 16 and at least two cameras 14. The falling channel is of a hollow structure and is vertically arranged, and the at least two camera devices 14 are arranged below an outlet of the falling channel and are uniformly arranged around the falling channel.
Specifically, the at least two cameras 14 are uniformly arranged around the falling passage and include: the at least two cameras 14 take as a center a point where a geometric center of the drop path in the vertical direction intersects a horizontal plane where the at least two cameras 14 are located, and positions of the at least two cameras 14 are set on the horizontal plane based on an angle of average division.
A transfer module 11 for transferring the products above the entrance of the drop shaft so that the products drop into the drop shaft.
Alternatively, the conveyor modules may be conveyor belts and the products may be arranged in a row at equal intervals, which are conveyed in turn over the entrance of the falling path on the conveyor modules 11.
And the camera device 14 is used for shooting the product falling from the outlet of the falling channel to obtain an image of the product.
Optionally, the frame rate of the image capturing device 14 is higher than 140 frames, and in the embodiment of the present application, a video camera with a frame rate of 200 frames is selected as the image capturing device.
Specifically, when the product passes through the camera device 14 in the falling process, the camera device 14 shoots the product to obtain an image of the product.
And the detection module 16 is used for determining whether the product has defects according to the images respectively obtained by the at least two image pick-up devices 14.
For example, fig. 3 is another schematic structural diagram of the detection apparatus provided in the embodiment of the present application, and as shown in fig. 3, the detection apparatus 1 may include a conveying module 11, a dropping path 12, a detection module (not shown in fig. 3), and an image pickup apparatus 14. Here, the transfer module 11 may be located above the drop shaft 12, and assuming that the transfer direction of the transfer module 11 in fig. 3 is from the first end to the second end, the second end of the transfer module 11 may be disposed right above the drop shaft 12. The dropping path 12 is a vertically arranged hollow path, an upper opening of the dropping path 12 is an inlet, a lower opening of the dropping path 12 is an outlet, a plurality of cameras 14 are uniformly arranged below the outlet of the dropping path 12 and around the dropping path 12 as a center, and fig. 3 shows the arrangement positions of the cameras 14 when there are two cameras 14. During the operation of the detecting device 1, the conveying module 11 conveys the bottle plug 0 to the inlet of the falling channel 12, and after the bottle plug 0 falls into the falling channel 12, the bottle plug makes free-falling body movement in the falling channel 12 until the bottle plug falls out from the outlet of the falling channel 12. After the image of the bottle stopper 0 is shot by the camera 14 arranged below the outlet of the falling channel 12, whether the bottle stopper 0 has a defect or not is identified through the detection of the detection module.
Because the bottle plug oneself can be adjusted the whereabouts posture of self in the in-process that falls down to keep the standard posture whereabouts that the heavier one end is down all the time after the adjustment, therefore the bottle plug falls into the whereabouts passageway back from the transfer module, no matter the posture when falling is how, finally can all become the standard posture and keep gradually under the influence of gravity, thereby can avoid the interference that bottle plug self swing caused to shooing, make camera module can shoot clear image, thereby can be according to the flaw on the accurate discernment product image of image processing algorithm.
Optionally, fig. 4 is a schematic structural diagram of a detection module provided in the embodiment of the present application. As shown in fig. 4, the detection module 16 may include: the processor 161, the memory 162, and the computer program 163 stored in the memory 162 and operable on the processor 161, when the processor 161 executes the computer program 163, the method performed by the detection module provided in the embodiment of the present application may be implemented.
The embodiment of the present application does not limit the number and types of the processors 161 and the memories 162.
The detection device of product flaw that this application embodiment provided continues the orbit that drops from the product that transfer module dropped through the passageway constraint of whereabouts, ensures that the product falls out from the export of whereabouts passageway to ensure to set up the image of shooting the product that the passageway export below that falls can be smooth, and then whether there is the flaw in the image through image processing algorithm discernment product, realize the automation of product flaw testing process, reduce manpower consumption, improve the detection efficiency of product flaw.
Optionally, in an implementation manner provided by the embodiment of the present application, after the detecting device detects that a product has a defect, a rejection instruction of the product may be sent to the sorting device.
Fig. 5 is a schematic view of an application manner provided by an embodiment of the present application, and for example, as shown in fig. 5, the sorting device 2 may include a conveying device 21, a sensor 22 and a rejecting device 23, which are used for rejecting the defective bottle stopper 0 detected by the detecting device 1, so as to ensure the quality of the product. The sensor 22 and the removing device 23 are connected in a wireless or wired manner, the sensor 22 and the removing device 23 may be sequentially disposed on two sides of the conveying device 21 according to the conveying direction of the conveying device 21 (as shown in fig. 5), and the sensor 22 may also be disposed on the removing device 23 (not shown in fig. 5).
Optionally, as shown in fig. 5, after the bottle plug 0 is detected by the detecting device 1, it falls into the sorting device 2, and the sorting device 2 sorts the bottle plug 0 according to the detection result of the detecting device 1. Specifically, the detecting device 1 sends a rejecting instruction to the sorting device 2 after detecting that the bottle plug 0 has a defect, and the rejecting device 23 in the sorting device 2 receives the rejecting instruction. Meanwhile, the bottle stopper 0 freely falls onto the transmission device 21 in the sorting device 2, the transmission device 21 transmits the bottle stopper 0 to the removing device 23, when the bottle stopper passes through the sensor 22, the sensor 22 detects that a product passes through the transmission device, the sensor 22 sends a message of the product passing through to the removing device 23, the removing device 23 executes a removing instruction after receiving the message, and the bottle stopper 0 can be removed from a product team with qualified quality through the blowing device or the picking device, so that the finally obtained products are all the products with qualified quality.
Optionally, the detection module provided in the embodiment of the present application is specifically configured to: and identifying whether the image has flaws or not by an image processing algorithm aiming at the image shot by each camera. And if the flaw exists, acquiring the position coordinate of the flaw on the image.
Optionally, before the image processing algorithm identifies whether a defect exists in the image, the image may be preprocessed through gray processing and binarization, so that interference of excessive data of colors and numerical values is removed, and efficiency and accuracy of identifying the defect by the image processing algorithm are improved.
Optionally, the position coordinate is a position coordinate of a center point of the flaw. For example, when the range of a single flaw is large, the position coordinate of the center point of the flaw is used as the position coordinate, and subsequent storage and operation of excessive coordinate data can be omitted.
Optionally, while the position coordinate of the defect on the image is obtained, the defect type corresponding to the position coordinate may also be obtained, so as to meet the requirement of some manufacturers on the identification of the defect type.
Optionally, the defect types may include: dirt, excess material and loss.
Optionally, as shown in fig. 2 or fig. 3, the detection apparatus provided in the embodiment of the present application may further include a display 15 for displaying an image and displaying a defect in the image. As shown in fig. 2, the display 15 and the detection module 16 in the detection apparatus 1 can establish a communication connection in a wireless or wired manner. After the detection device 1 identifies that the product has a defect through the image processing algorithm, the image and defect position information of the product can be transmitted to the display 15, and the display 15 displays the image and defect position of the product after receiving the information.
Fig. 6 is a display interface provided in an embodiment of the present application. As shown in fig. 6, the display 15 can display the photographed image of the product, and the defect position of the product identified by the image processing algorithm, and mark the defect type corresponding to the defect. For example, the flaw location and corresponding flaw type may be marked with indicator lines. Specifically, one end of the indication line is a flaw position of the product, and the other end of the indication line is a flaw type corresponding to the flaw position.
Alternatively, as shown in fig. 6, the display 15 may also display the location coordinates of the flaws. For example, the position coordinates of a defect with a stain type are (150, 170), the position coordinates of a defect with a missing type are (170, 150), and the position coordinates of a defect with a multi-material type are (170, 100). The image and the flaw position of the product are displayed through the display, so that a manufacturer can visually observe the product and the flaw of the product and know the details of the product and the flaw of the product.
Optionally, on the basis of the above embodiment, the embodiment of the present application further provides a structure of the dropping channel. Wherein, the falling channel can comprise a bearing part and a straight-through pipeline, and the bearing part and the straight-through pipeline are both hollow structures. The size of the inlet of the bearing part is larger than that of the outlet of the bearing part, the outlet of the bearing part is connected with the inlet of the straight-through pipeline, and the inner diameter size of the straight-through pipeline is larger than the maximum size of the product.
Fig. 7 is a schematic structural view of a dropping channel according to an embodiment of the present application, and exemplarily, as shown in fig. 7, the receiving portion 121 of the dropping channel 12 is used for receiving products dropped from the transfer module, and structurally, the size of the inlet of the receiving portion 121 is larger than that of the outlet of the receiving portion 121, so as to better receive the products dropped from the transfer module. The outlet of the adapting part 121 is connected with the straight-through pipeline 122, the size of the outlet of the adapting part 121 is equal to the inner diameter size of the straight-through pipeline 122, and the inner diameter size of the straight-through pipeline 122 is larger than the maximum size of a product, so that the product can be ensured to pass through smoothly, meanwhile, the falling range of the product is restrained, and the product is ensured to fall in a specified range from the outlet of the straight-through pipeline.
Optionally, the length of the falling passage may range from 15 cm to 20 cm.
Optionally, as shown in fig. 2 or fig. 7, the detection apparatus provided in the embodiment of the present application may further include an air supply module 17, and an air supply hole 171 is provided on a side wall of the dropping channel 12. And an air blowing module 17 for generating an air flow and blowing the air flow into the drop chute 12 through the air blowing holes 171 to rotate the product as it drops in the drop chute 12. For example, as shown in fig. 7, the blow hole 171 may be provided on the through duct 122 in the drop passage 12.
Alternatively, FIG. 8 is a top view of the drop shaft of FIG. 7. As shown in fig. 8, the blowing holes 171 may be provided as through holes having an inclined angle, and the hole diameter may be 5 mm.
Optionally, the air pressure of the air flow generated by the air supply module can be 0.4 MPa to 0.6 MPa.
The air supply module that this application embodiment provided blows in the whereabouts passageway through the air supply hole with the air current that air supply module produced, blows the edge to the product with the air current to blow the product rotation of falling in the whereabouts passageway, prevent that the product slope or card from falling in the passageway.
Optionally, as shown in fig. 3, the detection device provided in this embodiment of the application may further include a sensor module 13 disposed above the at least two cameras 14, where the sensor module 13 is configured to detect whether a product falls out of the falling passage 12, and send a shooting instruction to the at least two cameras 14 when detecting that a product falls out of the falling passage 12. The sensor module 13 and the imaging device 14 in the detection device 1 may be connected wirelessly or by wire. The sensor module 13 determines the timing of photographing the bottle stopper 0 by detecting whether the bottle stopper 0 falls out of the falling passage 12. When the sensor module 13 detects that a product falls out of the falling passage 12, a shooting command is sent to the camera device 14, so that the camera device 14 can shoot the bottle stopper 0 in time when the bottle stopper 0 falls out of the falling passage 12. The sensor module can timely detect that a product passes through and send a shooting instruction to the camera device, so that the camera device is ensured to successfully shoot the image of the product.
Alternatively, the sensor module can also be arranged on the drop shaft.
Alternatively, the sensor module may be a correlation laser sensor. As shown in fig. 3, the correlation laser sensor includes a transmitting end, a receiving end and a detection circuit, the transmitting end transmits laser 130 to the receiving end, the receiving end receives the laser 130, when the bottle stopper 0 passes between the transmitting end and the receiving end, the transmission of the laser 130 is blocked, so that the receiving end cannot receive the laser, and the detection circuit of the receiving end confirms that the product passes through. Through the correlation laser sensor, a shooting instruction can be directly generated when the receiving end cannot receive the laser signal, and the shooting instruction is sent to the camera device more quickly.
Optionally, in the detection apparatus provided in the embodiment of the present application, there may be 4 image capturing apparatuses. The side images of the product in 4 directions can be shot through 4 camera devices, so that complete image information of the side of the product is obtained, and the product is detected more comprehensively.
The present application further provides a method for detecting product defects, which is applied to the apparatus for detecting product defects provided in the foregoing embodiments. Fig. 9 is a schematic flow chart of a detection method according to another embodiment of the present application. As shown in fig. 9, a method for detecting a product defect according to another embodiment of the present application includes:
s101, when the product falls out from the outlet of the falling channel, the product is shot by at least two camera devices respectively, and an image of the product is obtained.
S102, determining whether the product has defects according to images obtained by shooting by at least two shooting devices respectively.
The method for detecting product defects provided by this embodiment is used to implement a device for detecting product defects provided by the device embodiment of this application, and the technical principle and technical effect are similar, and reference may be specifically made to the device embodiment section, which is not described herein again.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method for detecting a product defect in any of the method embodiments described above may be implemented.
It will be appreciated by those of ordinary skill in the art that any reference to memory, storage, databases, or other media used in the embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash Memory. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM is available in many forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Sync Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), Direct Rambus DRAM (DRDRAM), and Rambus Dynamic RAM (DRAM, RDRAM), among others.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A product defect detection device, comprising: the device comprises a conveying module, a falling channel, a detection module and at least two camera devices, wherein the falling channel is of a hollow structure and is vertically arranged, and the at least two camera devices are arranged below an outlet of the falling channel and evenly surround the falling channel:
the conveying module is used for conveying the products to the upper part of the inlet of the falling channel so as to enable the products to fall into the falling channel;
the camera device is used for shooting the product falling out of the outlet of the falling channel to obtain an image of the product;
the detection module is used for determining whether the product has defects according to the images obtained by the at least two camera devices respectively.
2. The apparatus of claim 1, further comprising: a sensor module disposed above the at least two cameras:
the sensor module is used for detecting whether a product falls out of the falling channel or not and sending a shooting instruction to the at least two camera devices when the product is detected to fall out of the falling channel.
3. The apparatus of claim 2, wherein the sensor module is a correlation laser sensor.
4. The apparatus according to any one of claims 1 to 3, wherein there are 4 imaging devices.
5. The device according to any one of claims 1 to 3, further comprising an air supply module, wherein an air supply hole is formed in a side wall of the falling channel;
and the air supply module is used for generating air flow and blowing the air flow into the falling channel through the air supply hole so as to enable the product to rotate when falling in the falling channel.
6. A device according to any one of claims 1 to 3, wherein the drop passage comprises a socket and a through conduit, both of which are hollow;
the size of the inlet of the bearing part is larger than that of the outlet of the bearing part, the outlet of the bearing part is connected with the inlet of the straight-through pipeline, and the inner diameter size of the straight-through pipeline is larger than the maximum size of the product.
7. The apparatus according to any one of claims 1-3, wherein the detection module is specifically configured to:
identifying whether flaws exist in the images or not through an image processing algorithm aiming at the images shot by each camera device;
and if the flaw exists, acquiring the position coordinate of the flaw on the image.
8. The apparatus of claim 7 wherein the location coordinate is a location coordinate of a center point of the flaw.
9. The apparatus of claim 8, further comprising a display to:
displaying the image and displaying the flaw in the image.
10. A method for detecting a product defect, which is applied to the apparatus for detecting a product defect according to any one of claims 1 to 9, the method comprising:
when a product falls out of the outlet of the falling channel, the product is shot by the at least two camera devices respectively to obtain an image of the product;
and determining whether the product has defects according to the images obtained by the at least two camera devices respectively.
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| CN202110616242.3A CN113554588A (en) | 2021-06-02 | 2021-06-02 | Product flaw detection device and method |
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| CN202110616242.3A CN113554588A (en) | 2021-06-02 | 2021-06-02 | Product flaw detection device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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