CN114252453A - Detection system and detection method - Google Patents
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/13—Moving of cuvettes or solid samples to or from the investigating station
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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
- G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
- G01N21/909—Investigating the presence of flaws or contamination in a container or its contents in opaque containers or opaque container parts, e.g. cans, tins, caps, labels
Abstract
The detection system comprises a conveying device, a triggering device and a detection device, wherein the triggering device is positioned on one side of the conveying device, the triggering device and the conveying device are positioned on the same horizontal plane, the detection device is positioned above the conveying device, the detection device and the conveying device are positioned on the same vertical plane, the horizontal plane is vertical to the vertical plane, and the triggering device is in communication connection with the detection device; the conveying device conveys the target object; under the condition that the trigger device determines that the target object reaches the detection position, generating a detection instruction and sending the detection instruction to the detection device; the detection device acquires a target image of the target object based on the detection instruction, and calculates the target image to obtain a detection result for the target object. According to the method and the device, the target object is detected through the detection system, manual participation is not needed, the influence of human factors on the detection accuracy is avoided, and the detection accuracy and the detection efficiency are improved.
Description
Technical Field
The present disclosure relates to the field of product detection technologies, and in particular, to a detection system and a detection method.
Background
The visual detection technology is widely applied to the industries of food, wine brewing, beverage, medicine, tobacco, automobiles, printing and the like. For example, for an empty can containing beverage, a program for detecting the quality of the empty can is separately arranged on a production line, and at present, the quality of the empty can is selected by manual visual inspection so as to control the production quality of the empty can.
However, manual detection has great limitations, such as unstable detection accuracy caused by fatigue, that is, the accuracy is greatly influenced by human factors, and further the accuracy is low; moreover, the manual detection efficiency is low.
Disclosure of Invention
In view of this, an object of the embodiments of the present disclosure is to provide a detection system and a detection method, which are used to solve the problem of low accuracy and detection efficiency caused by manual detection in the prior art.
In a first aspect, an embodiment of the present disclosure provides a detection system, including a conveying device, a triggering device, and a detection device, where the triggering device is located at one side of the conveying device, the triggering device and the conveying device are located on the same horizontal plane, the detection device is located above the conveying device, the detection device and the conveying device are located on the same vertical plane, the horizontal plane and the vertical plane are perpendicular to each other, and the triggering device and the detection device are in communication connection;
the conveying device conveys the target object;
under the condition that the trigger device determines that the target object reaches the detection position, generating a detection instruction and sending the detection instruction to the detection device;
the detection device acquires a target image of the target object based on the detection instruction, and calculates the target image to obtain a detection result for the target object.
In one possible embodiment, the conveying means comprises a conveyor belt and a vacuum pump;
the conveyor belt is used for bearing the target object and conveying the target object;
the vacuum pump is connected with the vacuum holes on the conveyor belt, so that the vacuum holes are in a vacuum state to fix the target object.
In one possible embodiment, adjacent sets of vacuum holes on the conveyor belt are spaced apart a predetermined distance, each set of vacuum holes including one or more vacuum holes.
In one possible embodiment, the triggering device is a photosensor.
In a possible implementation manner, the detection device comprises a processor, a polishing device and an image acquisition device, wherein the processor is connected with both the polishing device and the image acquisition device;
the processor responds to the detection instruction to start the polishing device so as to enable the polishing device to be in a polishing state;
after the processor starts the polishing device, the processor controls the image acquisition device to acquire a target image of the target object;
the processor acquires the target image and calculates the target image to obtain a detection result for the target object.
In one possible embodiment, the method further comprises:
the processor carries out denoising processing on the target image to obtain a denoised target image;
extracting a target characteristic image and a standard image corresponding to the target characteristic image from the denoised target image;
and determining the detection result of the target object based on the target characteristic image and the standard image.
In one possible embodiment, the processor, when determining the detection result of the target object based on the target feature image and the standard image, includes:
the processor compares the target characteristic image with the standard image to obtain a difference image;
determining an area occupied by a difference pixel in the difference image;
and determining that the detection result is unqualified under the condition that the area is larger than a preset threshold value.
In a possible embodiment, the device further comprises a rejecting device, wherein the rejecting device is connected with the detecting device;
the detection device generates a rejection instruction and sends the rejection instruction to the rejection device under the condition that the detection result is determined to be unqualified;
and the rejecting device rejects the target object in response to the rejecting instruction.
In a possible implementation manner, the rejecting device comprises an electromagnetic valve, a gas storage device, a gas pipe and a gas outlet device, wherein the electromagnetic valve is connected with the gas storage device, and the gas storage device and the gas outlet device are connected through the gas pipe;
the electromagnetic valve responds to the rejection instruction to control the gas storage device to transmit gas to the gas outlet device through the gas pipe;
the gas outlet device releases gas to the target object so as to reject the target object out of the conveying device.
In a second aspect, an embodiment of the present disclosure further provides a detection method, where the detection method includes:
acquiring a target image of the target object, wherein the target image is an image acquired by a detection device responding to a detection instruction, and the detection instruction is generated when a trigger device determines that the target object reaches a detection position;
and calculating the target image to obtain a detection result aiming at the target object.
The embodiment of the disclosure detects the target object through the conveying device, the triggering device and the detecting device which are included by the detecting system, obtains the detection result of the target object, does not need manual participation, avoids the influence of human factors on the detection accuracy, and improves the detection accuracy and the detection efficiency.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the present disclosure or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present disclosure, and other drawings can be obtained by those skilled in the art without inventive exercise.
FIG. 1 illustrates a schematic structural diagram of a detection system provided by the present disclosure;
FIG. 2 illustrates a flow chart of a detection method provided by the present disclosure;
FIG. 3 illustrates a flow chart of another detection method provided by the present disclosure;
FIG. 4 illustrates a flow chart of another detection method provided by the present disclosure;
FIG. 5 illustrates a flow chart of another detection method provided by the present disclosure;
fig. 6 shows a flow chart of another detection method provided by the present disclosure.
Reference numerals:
1-a transfer device; 2-a trigger device; 3-detection device.
Detailed Description
Various aspects and features of the disclosure are described herein with reference to the drawings.
It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Other modifications will occur to those skilled in the art within the scope and spirit of the disclosure.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above, and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.
These and other characteristics of the present disclosure will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It should also be understood that, although the present disclosure has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of the disclosure, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present disclosure will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the disclosure that may be embodied in various forms. Well-known and/or repeated functions and structures have not been described in detail so as not to obscure the present disclosure with unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.
The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the disclosure.
In a first aspect, to facilitate understanding of the present disclosure, a detection system provided by the present disclosure is first shown in fig. 1, and includes a conveying device 1, a triggering device 2, and a detection device 3, where the triggering device 2 is located on one side of the conveying device 1, the triggering device 2 is located on the same horizontal plane as the conveying device 1, the detection device 3 is located above the conveying device 1, the detection device 3 is located on the same vertical plane as the conveying device 1, the horizontal plane is perpendicular to the vertical plane, and the triggering device 2 is in communication connection with the detection device 3.
In practical applications, the conveyor 1 is used for transporting target objects. Specifically, the conveying device 1 includes a conveyor belt and a vacuum pump; the conveyor belt is used for bearing the target object and conveying the target object; and the vacuum holes are arranged on the conveyor belt at intervals, a preset distance is arranged between two adjacent groups of vacuum holes on the conveyor belt, each group of vacuum holes comprises one or more vacuum holes, and the vacuum pump is connected with the vacuum holes on the conveyor belt so as to enable the vacuum holes to be in a vacuum state to fix the target object. As an example, a preset length of the conveyor belt is separated to be used as a conveying unit, each conveying unit is sealed on a chain plate to be perforated, namely vacuum holes, and the diameter of each vacuum hole is 2.5-3.0 mm; the pump cavity is vacuumized by utilizing the high-speed rotation of the fan, so that the vacuum holes in the conveyor belt suck air to form negative pressure on the partial conveyor belt, and further a certain distance is generated between a target object and the target object, wherein the distance is the distance between the vacuum holes of two adjacent conveying units; the vacuum holes absorb the target object by using vacuum force, so that the target object can run stably on the conveyor belt, and the problem of inaccurate detection result caused by the phenomenon that the target object shakes in the conveying process is solved.
In a specific implementation, the triggering device 2 is configured to generate a detection instruction and send the detection instruction to the detecting device 3 when it is determined that the target object reaches the detection position. Wherein the triggering device 2 is a photoelectric sensor.
After receiving the detection instruction, the detection device 3 acquires a target image of the target object based on the detection instruction, and calculates the target image to obtain a detection result for the target object.
Specifically, the detection device 3 includes a processor, a polishing device and an image acquisition device, and the processor is connected with both the polishing device and the image acquisition device. After receiving the detection instruction, the processor responds to the detection instruction to start the polishing device so as to enable the polishing device to be in a polishing state, wherein the polishing device can be an LED and the like; and after the processor starts the lighting device, the processor controls the image acquisition device to acquire a target image of the target object, wherein the image acquisition can be a camera and the like. Of course, the lighting device may be turned on and the image capturing device may be controlled to capture the target image of the target object.
In specific implementation, under the condition that the surface of the target object is made of a metal material, the detection device 3 may further include a coaxial light source and an integrating sphere light source, and the combination of the coaxial light source and the integrating sphere light source can eliminate reflection interference on the metal surface of the target object, and suppress noise of the acquired target image, so that imaging is clear and the brightness of the target image is uniform.
After the image acquisition device acquires the target image, the target image is transmitted to the processor, and of course, the processor may acquire the target image acquired by the image acquisition device in real time or periodically.
After acquiring the target image, the processor calculates the target image to obtain a detection result for the target object. When the target image is calculated, the processor carries out denoising processing on the target image to obtain a denoised target image, and specifically, median processing is carried out by a median filter 3 x 3 to remove noise and further output the target image meeting preset requirements; the image acquisition device acquires images when a target object is in a dynamic state, so that each target image has noise interference, and noise in the target image is removed through a median filter, so that each output image is close; once there is a target image with a defect, even if the median filter process cannot compensate the defect, the defect is highlighted to provide a basis for the next process. The preset requirement is that the target image is within a preset range value after median processing, for example, the brightness and the black-white gray scale of the target image obtained by shooting a qualified target object are both similar and meet the preset range value; the brightness and black and white gray scale of the target image obtained by shooting the unqualified target object can be locally changed.
And then, extracting a target characteristic image and a standard image corresponding to the target characteristic image from the denoised target image. Specifically, a matching algorithm is used for finding a characteristic image from a target image; if the circle is found, more than 6 circles are formed in the 'image of the foreign matter in the tank'; further, determining a target characteristic image from the found characteristic images by using a positioning algorithm; such as the image in which the largest "circle" is located as the target feature image.
After the target feature image is determined, a detection result of the target object is determined based on the target feature image and the standard image. Specifically, the processor compares the target characteristic image with the standard image to obtain a difference image, determines the area occupied by all or part of the difference pixels which are intensively presented or dispersedly presented in the difference image through a preset algorithm such as a BLOB algorithm, and determines that the detection result is unqualified under the condition that the area is larger than a preset threshold value. Of course, the unqualified type of the target object can be determined according to the determined detection result, and the unqualified type comprises tank opening defect, tank opening depression, tank bottom foreign matter, tank body deformation and the like under the condition that the target object is an empty tank.
The embodiment of the disclosure detects the target object through the conveying device 1, the triggering device 2 and the detecting device 3 which are included in the detecting system, and obtains the detecting result of the target object, without manual participation, thereby avoiding the influence of human factors on the detecting accuracy and improving the detecting accuracy and the detecting efficiency.
Further, the detection system provided by the embodiment of the present disclosure further includes a rejecting device, and the rejecting device is connected with the detection device 3. In specific implementation, when the detection device 3 determines that the detection result is unqualified, a rejection instruction is generated and sent to the rejection device.
And after receiving the removing instruction, the removing device removes the target object in response to the removing instruction. Specifically, the removing device comprises an electromagnetic valve, a gas storage device, a gas pipe and a gas outlet device, wherein the electromagnetic valve is connected with the gas storage device, the gas storage device and the gas outlet device are connected through the gas pipe, and a gas pipe bracket can be arranged according to actual requirements such as the position of the gas pipe for supporting the gas pipe; after receiving the rejection instruction, the electromagnetic valve responds to the rejection instruction to control the gas storage device to transmit the gas to the gas outlet device through the gas pipe, so that the gas outlet device releases the gas to the target object to reject the target object out of the conveying device 1.
The embodiment of the disclosure can automatically remove unqualified target objects, does not need manual participation, saves time and labor and has higher production efficiency.
Based on the same inventive concept, the second aspect of the present disclosure further provides a detection method, which is applied to the detection system, and since the principle of solving the problem of the detection method in the present disclosure is similar to that of the detection system in the present disclosure, the implementation of the detection method may refer to the implementation of the method, and repeated details are not repeated.
Referring to the method flowchart shown in fig. 2, the detection method includes:
s201, acquiring a target image of a target object, wherein the target image is an image acquired by a detection device responding to a detection instruction, and the detection instruction is generated when a trigger device determines that the target object reaches a detection position;
s202, calculating the target image to obtain a detection result aiming at the target object.
The detection result for the target object is obtained according to the method flowchart shown in fig. 3, and the specific steps are as follows:
s301, responding to the detection instruction, starting the polishing device to enable the polishing device to be in a polishing state;
s302, after the polishing device is started, controlling the image acquisition device to acquire a target image of the target object;
s303, acquiring the target image and calculating the target image to obtain a detection result aiming at the target object.
Determining the detection result of the target object according to the method flowchart shown in fig. 4, specifically including the following steps:
s401, denoising the target image to obtain a denoised target image;
s402, extracting a target characteristic image and a standard image corresponding to the target characteristic image from the denoised target image;
and S403, determining the detection result of the target object based on the target characteristic image and the standard image.
Determining the detection result of the target object according to the method flowchart shown in fig. 5, specifically including the following steps:
s501, the processor compares the target characteristic image with the standard image to obtain a difference image;
s502, determining the area occupied by all or part of difference pixels which are in centralized presentation or scattered presentation in the difference image;
and S503, determining that the detection result is unqualified under the condition that the area is larger than a preset threshold value.
In yet another embodiment, FIG. 6 shows a flow diagram of another detection method, comprising:
s601, generating a rejecting instruction and sending the rejecting instruction to a rejecting device under the condition that the detection result is determined to be unqualified;
and S602, rejecting the target object in response to the rejection instruction.
The embodiment of the disclosure detects the target object through the conveying device, the triggering device and the detecting device which are included by the detecting system, obtains the detection result of the target object, does not need manual participation, avoids the influence of human factors on the detection accuracy, and improves the detection accuracy and the detection efficiency.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.
Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
While the present disclosure has been described in detail with reference to the embodiments, the present disclosure is not limited to the specific embodiments, and those skilled in the art can make various modifications and alterations based on the concept of the present disclosure, and the modifications and alterations should fall within the scope of the present disclosure as claimed.
Claims (10)
1. A detection system is characterized by comprising a conveying device, a triggering device and a detection device, wherein the triggering device is positioned on one side of the conveying device, the triggering device and the conveying device are positioned on the same horizontal plane, the detection device is positioned above the conveying device, the detection device and the conveying device are positioned on the same vertical plane, the horizontal plane and the vertical plane are perpendicular to each other, and the triggering device and the detection device are in communication connection;
the conveying device conveys the target object;
under the condition that the trigger device determines that the target object reaches the detection position, generating a detection instruction and sending the detection instruction to the detection device;
the detection device acquires a target image of the target object based on the detection instruction, and calculates the target image to obtain a detection result for the target object.
2. The detection system of claim 1, wherein the conveyor comprises a conveyor belt and a vacuum pump;
the conveyor belt is used for bearing the target object and conveying the target object;
the vacuum pump is connected with the vacuum holes on the conveyor belt, so that the vacuum holes are in a vacuum state to fix the target object.
3. The inspection system of claim 2, wherein adjacent sets of vacuum holes on the conveyor belt are spaced apart a predetermined distance, each set of vacuum holes including one or more vacuum holes.
4. The detection system of claim 1, wherein the triggering device is a photosensor.
5. The detection system according to claim 1, wherein the detection device comprises a processor, a polishing device and an image acquisition device, and the processor is connected with the polishing device and the image acquisition device;
the processor responds to the detection instruction to start the polishing device so as to enable the polishing device to be in a polishing state;
after the processor starts the polishing device, the processor controls the image acquisition device to acquire a target image of the target object;
the processor acquires the target image and calculates the target image to obtain a detection result for the target object.
6. The detection system of claim 5, further comprising:
the processor carries out denoising processing on the target image to obtain a denoised target image;
extracting a target characteristic image and a standard image corresponding to the target characteristic image from the denoised target image;
and determining the detection result of the target object based on the target characteristic image and the standard image.
7. The detection system according to claim 6, wherein the processor, when determining the detection result of the target object based on the target feature image and the standard image, comprises:
the processor compares the target characteristic image with the standard image to obtain a difference image;
determining an area occupied by a difference pixel in the difference image;
and determining that the detection result is unqualified under the condition that the area is larger than a preset threshold value.
8. The detection system according to claim 1, further comprising a rejecting device connected to the detection device;
the detection device generates a rejection instruction and sends the rejection instruction to the rejection device under the condition that the detection result is determined to be unqualified;
and the rejecting device rejects the target object in response to the rejecting instruction.
9. The detection system according to claim 1, wherein the rejecting device comprises an electromagnetic valve, a gas storage device, a gas pipe and a gas outlet device, the electromagnetic valve is connected with the gas storage device, and the gas storage device is connected with the gas outlet device through the gas pipe;
the electromagnetic valve responds to the rejection instruction to control the gas storage device to transmit gas to the gas outlet device through the gas pipe;
the gas outlet device releases gas to the target object so as to reject the target object out of the conveying device.
10. A method of detection, comprising:
acquiring a target image of the target object, wherein the target image is an image acquired by a detection device responding to a detection instruction, and the detection instruction is generated when a trigger device determines that the target object reaches a detection position;
and calculating the target image to obtain a detection result aiming at the target object.
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| CN102445456A (en) * | 2011-10-09 | 2012-05-09 | 河海大学常州校区 | Device and method for nondestructively detecting egg quality based on DSP (Dynamic Signal Processing) machine vision |
| CN106824806A (en) * | 2016-12-27 | 2017-06-13 | 聊城大学 | The detecting system and detection method of the low module plastic gear based on machine vision |
| CN106628475A (en) * | 2017-01-23 | 2017-05-10 | 四川理工学院 | Mirror surface imaging bottle cap surface labeling detecting system and method based on machine vision |
| CN107961989A (en) * | 2017-12-21 | 2018-04-27 | 广州南沙珠江啤酒有限公司 | A kind of bottle liquid level detection system and detection method suitable for retaining wine foam in bottle |
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| CN113570549A (en) * | 2021-06-30 | 2021-10-29 | 青岛海尔科技有限公司 | Defect detection method and device for reflective surface |
| CN113723176A (en) * | 2021-07-19 | 2021-11-30 | 上海闪马智能科技有限公司 | Target object determination method and device, storage medium and electronic device |
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