CN112837265A - Detection algorithm for realizing no-stop board of assembly line - Google Patents
Detection algorithm for realizing no-stop board of assembly line Download PDFInfo
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- CN112837265A CN112837265A CN202110002253.2A CN202110002253A CN112837265A CN 112837265 A CN112837265 A CN 112837265A CN 202110002253 A CN202110002253 A CN 202110002253A CN 112837265 A CN112837265 A CN 112837265A
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- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 230000000007 visual effect Effects 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 208000003464 asthenopia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
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- G06T2207/10—Image acquisition modality
- G06T2207/10004—Still image; Photographic image
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- G06—COMPUTING; CALCULATING OR COUNTING
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Abstract
The invention discloses a detection algorithm for realizing no-stop of a production line, which comprises the following steps: the acquisition frame rate of the camera is improved, and the number of cached images is increased; placing an object to be detected in a visual field range to collect a picture; drawing a detection area and two characteristic points of an object to be detected for positioning a product; the program is divided into two threads, one thread is used for a camera to acquire the dynamic process of the whole board, the acquired images are pressed into a queue, and one thread takes one frame of image from the queue for positioning detection; setting a flag bit default value as F, cutting a frame of image to obtain a detection area, detecting two characteristic areas in the area to be detected, setting T for the flag bit after the characteristic areas are detected, and detecting a board component; and taking out a frame of image from the queue, cutting the region to be detected, detecting the characteristic region, and detecting the characteristic region. According to the invention, an inductor is not required; the speed of the pipeline may vary; the pipeline may not be stalled.
Description
Technical Field
The invention relates to the technical field of assembly line detection, in particular to a detection algorithm for realizing no-stop of an assembly line.
Background
The visual detection system uses an industrial camera to replace human eyes to complete the functions of identification, measurement, positioning and the like. The general visual detection system is formed by combining a camera, a lens and a light source, can replace manual work to finish detection of bar code characters, cracks, packages, complete surface layers, depressions and the like, can effectively improve the detection speed and precision of a production line by using the visual detection system, greatly improves the yield and quality, reduces the labor cost, and simultaneously prevents misjudgment caused by eye fatigue.
At present, most of assembly line detection is static detection, objects to be detected flow, the sensor senses the objects to be detected, the cylinder is prevented from rising immediately, photographing detection is conducted, and the objects to be detected are released. The product to be detected before wave soldering and without fixation is disadvantageous because the product to be detected on the production line has inertia in movement, and the plug-in unit on the product can incline at the moment blocked by the blocking cylinder, so that the detection difficulty is increased. If dynamic detection is used (the product to be detected does not pause), the difficulty is correct identification and detection of the detected product, and repeated detection and less detection are caused because the pipeline speed is variable.
Disclosure of Invention
The invention aims to provide a detection algorithm for realizing no-stop of a production line, which aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a detection algorithm for realizing the non-stop of a production line comprises the following steps:
s1: the acquisition frame rate of the camera is improved, and the number of cached images is increased;
s2: placing an object to be detected in a visual field range to collect a picture;
s3: drawing a detection area and two characteristic points of an object to be detected for positioning a product;
s4: the program is divided into two threads, one thread is used for a camera to acquire the dynamic process of the whole board, the acquired images are pressed into a queue, and one thread takes one frame of image from the queue for positioning detection;
s5: setting a flag bit default value as F, cutting a frame of image to obtain a detection area, detecting two characteristic areas in the area to be detected, setting T for the flag bit after the characteristic areas are detected, and detecting a board component;
s6: taking out a frame of image from the team, cutting the area to be detected, detecting the characteristic area, and detecting the characteristic area;
s7: and taking the picture cutting to-be-detected area from the queue, and then searching the characteristic area.
Preferably, the standard for increasing the frame rate of the camera in step S1 is to capture both the inflow and outflow states of the product when the linear velocity of the water flow is different within the field of view of the camera.
Preferably, the characteristic region is detected in step S6, and if the flag is T, the board does not need to be detected, which indicates that the product in the frame of image is a slight movement of the last product; if the characteristic area can not be detected, the flag bit is set to F, and the frame of image captures the junction of the first product and the second product.
Preferably, in step S7, the characteristic region is searched, if the flag is T or F, if T indicates a previous product, if F indicates a new product entering the field of view, and then the board component is detected.
Compared with the prior art, the invention has the beneficial effects that: no inductor is needed; the speed of the pipeline may vary; the pipeline may not be stalled.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, an algorithm for detecting a non-stop board in a production line includes the following steps:
s1: the acquisition frame rate of the camera is improved, and the number of cached images is increased;
s2: placing an object to be detected in a visual field range to collect a picture;
s3: drawing a detection area and two characteristic points of an object to be detected for positioning a product;
s4: the program is divided into two threads, one thread is used for a camera to acquire the dynamic process of the whole board, the acquired images are pressed into a queue, and one thread takes one frame of image from the queue for positioning detection;
s5: setting a flag bit default value as F, cutting a frame of image to obtain a detection area, detecting two characteristic areas in the area to be detected, setting T for the flag bit after the characteristic areas are detected, and detecting a board component;
s6: taking out a frame of image from the team, cutting the area to be detected, detecting the characteristic area, and if the flag bit is T, not needing to detect a board, indicating that the product of the frame of image is the slight movement of the previous product; if the characteristic area can not be detected, setting the flag bit to be F, and indicating that the frame of image captures the junction of the first product and the second product;
s7: and taking the picture to be cut to be checked out from the queue, then searching a characteristic area, if the flag bit is T or F, if the flag bit is T or the previous product, and if the flag bit is F, the new product enters the visual field, and then detecting the board component.
Preferably, the standard for increasing the frame rate of the camera in step S1 is to capture both the inflow and outflow states of the product when the linear velocity of the water flow is different within the field of view of the camera.
The working principle of the invention is as follows: the acquisition frame rate of the camera is improved, and the number of cached images is increased; placing an object to be detected in a visual field range to collect a picture; drawing a detection area and two characteristic points of an object to be detected for positioning a product; the program is divided into two threads, one thread is used for a camera to acquire the dynamic process of the whole board, the acquired images are pressed into a queue, and one thread takes one frame of image from the queue for positioning detection; setting a flag bit default value as F, cutting a frame of image to obtain a detection area, detecting two characteristic areas in the area to be detected, setting T for the flag bit after the characteristic areas are detected, and detecting a board component; taking out a frame of image from the team, cutting the area to be detected, detecting the characteristic area, and if the flag bit is T, not needing to detect a board, indicating that the product of the frame of image is the slight movement of the previous product; if the characteristic area can not be detected, setting the flag bit to be F, and indicating that the frame of image captures the junction of the first product and the second product; and taking the picture to be cut to be checked out from the queue, then searching a characteristic area, if the flag bit is T or F, if the flag bit is T or the previous product, and if the flag bit is F, the new product enters the visual field, and then detecting the board component.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A detection algorithm for realizing the non-stop of a production line is characterized in that: the method comprises the following steps:
s1: the acquisition frame rate of the camera is improved, and the number of cached images is increased;
s2: placing an object to be detected in a visual field range to collect a picture;
s3: drawing a detection area and two characteristic points of an object to be detected for positioning a product;
s4: the program is divided into two threads, one thread is used for a camera to acquire the dynamic process of the whole board, the acquired images are pressed into a queue, and one thread takes one frame of image from the queue for positioning detection;
s5: setting a flag bit default value as F, cutting a frame of image to obtain a detection area, detecting two characteristic areas in the area to be detected, setting T for the flag bit after the characteristic areas are detected, and detecting a board component;
s6: taking out a frame of image from the team, cutting the area to be detected, detecting the characteristic area, and detecting the characteristic area;
s7: and taking the picture cutting to-be-detected area from the queue, and then searching the characteristic area.
2. The detection algorithm for realizing the pipeline non-stop board according to claim 1, characterized in that: the standard for increasing the frame rate of the camera in step S1 is to capture both the inflow and outflow states of the product when the linear velocity of the water is different in the field of view of the camera.
3. The detection algorithm for realizing the pipeline non-stop board according to claim 1, characterized in that: the characteristic region is detected in the step S6, if the flag bit is T, the board does not need to be detected, and the product in the frame of image is a slight movement of the last product; if the characteristic area can not be detected, the flag bit is set to F, and the frame of image captures the junction of the first product and the second product.
4. The detection algorithm for realizing the pipeline non-stop board according to claim 1, characterized in that: in step S7, a characteristic region is searched, if the flag is T or F, if T indicates a previous product, if F indicates a new product entering the field of view, and then the board component is detected.
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| CN202110002253.2A CN112837265A (en) | 2021-01-04 | 2021-01-04 | Detection algorithm for realizing no-stop board of assembly line |
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| CN104268602A (en) * | 2014-10-14 | 2015-01-07 | 大连理工大学 | Shielded workpiece identifying method and device based on binary system feature matching |
| CN108855971A (en) * | 2018-03-30 | 2018-11-23 | 佛山市南海区广工大数控装备协同创新研究院 | A kind of sole intelligent sorting method |
| CN110006345A (en) * | 2019-04-22 | 2019-07-12 | 东华大学 | A kind of automotive wire bundle on-line measuring device and method based on machine vision |
| CN110631476A (en) * | 2018-06-22 | 2019-12-31 | 株式会社斯库林集团 | Marker position detection device, drawing device, and marker position detection method |
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2021
- 2021-01-04 CN CN202110002253.2A patent/CN112837265A/en active Pending
Patent Citations (7)
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| JPH1053316A (en) * | 1996-08-08 | 1998-02-24 | Fanuc Ltd | Sliding quantity measuring method of conveyor and tracking action correcting method of robot |
| JP2011028417A (en) * | 2009-07-23 | 2011-02-10 | Nec Corp | Marker detection device, system and apparatus for generating and detecting marker, method and program for detecting marker |
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| CN104268602A (en) * | 2014-10-14 | 2015-01-07 | 大连理工大学 | Shielded workpiece identifying method and device based on binary system feature matching |
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