CN115876085A - Coating edge detection device and method based on adjustable light source - Google Patents
Coating edge detection device and method based on adjustable light source Download PDFInfo
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- CN115876085A CN115876085A CN202310005399.1A CN202310005399A CN115876085A CN 115876085 A CN115876085 A CN 115876085A CN 202310005399 A CN202310005399 A CN 202310005399A CN 115876085 A CN115876085 A CN 115876085A
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Abstract
The invention discloses a coating edge detection device and method based on an adjustable light source, which comprises a linear array CCD and a high-speed AD, wherein the linear array CCD and the high-speed AD are used for acquiring image information of a coating edge; the FPGA is used for driving the linear array CCD and the high-speed AD and storing the image information into an FIFO (first in first out) in the FPGA; the ARM is used for reading the image information in the FPGA, calculating edge position information based on the image information and outputting the edge position information; the light source control unit comprises a light source channel unit and a light source brightness selection unit and is used for selecting a light source channel and light source brightness; the output display unit is used for outputting and displaying the edge position information calculated by the ARM, and simultaneously displaying the keys of the device, so that the brightness is adjustable, the output speed is high enough, the edge detection is more stable, the problem that a target is easy to lose is solved, the condition of high machine speed can be met, one-key calibration is adopted, the light source and the image are associated in the device, and the light source is automatically adjustable, so that the operation is simpler.
Description
Technical Field
The application relates to the technical field of coating edge detection, in particular to a coating edge detection device and method based on an adjustable light source.
Background
When the coating edge of the pole piece is detected in the lithium battery industry, one mode is to adopt the existing linear array camera or area array camera and adopt the mode of an external adjustable light source, and realize the edge searching algorithm on an industrial personal computer, so the method has the advantages that the algorithm is easy to realize, the ready-made library is called, the calculation capacity is sufficient, the defects of high cost, large volume, inconvenience in installation and complex interface and inconvenient operation are caused, and the light source needs to be manually adjusted because the light source is not in communication with the industrial personal computer and the like; the other mode is realized by adopting an embedded singlechip, but the light source generally adopts a single light source or a three-color light source, and has the advantages of small volume, low cost, easy installation and easy operation, and has the defects of unadjustable light source, unstable edge detection, easy target loss, poor calculation and incapability of adapting to the high-speed condition.
Therefore, the coating edge detection device based on the adjustable light source is provided, the adjustable light source is realized, the calculation force is sufficient, the size is small, and the technical problem to be solved at present is solved.
Disclosure of Invention
The invention provides a coating edge detection device based on an adjustable light source, which is used for solving the technical problems that the light source is not adjustable and the calculation force cannot meet the high-speed condition in the prior art, and comprises a light source, a light source and a light source;
the linear array CCD and the high-speed AD are used for acquiring image information of a coating edge;
the FPGA field programmable gate array is used for driving the linear array CCD and the high-speed AD and storing the image information into an FIFO inside the FPGA;
the ARM is used for reading the image information in the FPGA, calculating edge position information based on the image information and outputting the edge position information;
the light source control unit comprises a light source channel unit and a light source brightness selection unit, wherein the light source channel unit is used for selecting a light source channel, and the light source brightness selection unit is used for selecting light source brightness;
and the output display unit is used for outputting and displaying the edge position information calculated by the ARM and displaying keys of the device.
In some embodiments of the present application, the linear array CCD and the high-speed AD are all connected to the FPGA through the IO port, the FPGA and the ARM perform data exchange through the FSMC mode, and the light source control unit and the output display unit are all connected to the ARM through the IO port.
In some embodiments of the present application, one end of the light source channel unit is connected to the ARM through an IO port, and the other end of the light source channel unit is connected to the driving light source and is controlled by the driving light source to select a light source color.
In some embodiments of the present application, the light source brightness selecting unit includes a third field effect transistor, a fourth field effect transistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor, and an amplifier,
a first end of the seventh resistor is used as a PWM terminal to adjust the light source brightness of the light source brightness selection unit, a common junction of a second end of the seventh resistor and a first end of the eighth resistor is connected to a first end of the fifth capacitor, a second end of the fifth capacitor is grounded, a common junction of a second end of the eighth resistor, a first end of the sixth capacitor and a fifth end of the amplifier is connected to a third end of the fourth field-effect transistor, a common junction of a second end of the fourth field-effect transistor and a second end of the eleventh resistor is grounded, a common junction of a second end of the fourth field-effect transistor and a first end of the eleventh resistor is connected to an IO port of the ARM, a common junction of a sixth end of the amplifier and a second end of the seventh capacitor is connected to the tenth resistor, a common junction of a seventh end of the amplifier and a first end of the ninth resistor is connected to a first end of the seventh capacitor, a second end of the ninth resistor is connected to a first end of the third field-effect transistor, a second end of the third resistor is connected to a common junction of the twelfth resistor, and a twelfth terminal of the drive resistor are connected to the twelfth terminal of the twelfth field-effect transistor.
Correspondingly, the invention also provides a coating edge detection method based on an adjustable light source, which is applied to the coating edge detection device based on the adjustable light source, and the method comprises the following steps:
the method comprises the steps that image information of a coating edge is collected through an FPGA driving linear array CCD and a high-speed AD, and the image information is stored in an FIFO of the FPGA;
reading the image information from the FIFO into an ARM through the FSMC, and calculating edge position information of the image information;
and outputting and displaying the edge position information through an output display unit.
In some embodiments of the present application, the method further includes a one-key calibration mode, where the one-key calibration mode specifically includes:
when the coating edge detection device is used for the first time or the edge information changes, entering a one-key calibration mode through a key on the output display unit;
adjusting the light source channels and the light source brightness through a light source control unit, and recording the contrast of edge information of different light source channels and different brightness of the same light source channel;
and selecting the corresponding light source channel and light source brightness when the contrast ratio is maximum, and performing edge search on the current coating material based on the corresponding light source channel and light source brightness when the contrast ratio is maximum.
Through using above technical scheme, coating edge detection device based on adjustable light source includes: the linear array CCD and the high-speed AD are used for acquiring image information of a coating edge; the FPGA is used for driving the linear array CCD and the high-speed AD and storing the image information into an FIFO (first in first out) in the FPGA; the ARM is used for reading the image information in the FPGA, calculating edge position information based on the image information and outputting the edge position information; the light source control unit comprises a light source channel unit and a light source brightness selection unit and is used for selecting a light source channel and light source brightness; the output display unit is used for outputting and displaying the edge position information calculated by the ARM, and simultaneously displaying the keys of the device, so that the light source is built-in, the color is selectable, the brightness is adjustable, the brightness of the external light source is adjustable, the embedded single-chip microcomputer mode is small, the output speed is high enough, the edge detection is more stable, the problem that a target is easy to lose is better solved, the high-speed condition can be met, a one-key calibration mode is adopted, the light source and an image are related in the device, the light source is automatically adjustable, the operation is simpler, and the problem of complex and inconvenient operation of an interface is solved.
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 description of the embodiments are briefly introduced 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 creative efforts.
Fig. 1 shows a schematic structural diagram of a coating edge detection device based on an adjustable light source according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a light source brightness selecting unit according to an embodiment of the present invention;
fig. 3 shows a schematic flow chart of a coating edge detection method based on an adjustable light source according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The embodiment of the application provides a coating edge detection device based on adjustable light source, as shown in fig. 1, the device includes:
the linear array CCD and the high-speed AD are used for acquiring image information of a coating edge;
the FPGA field programmable gate array is used for driving the linear array CCD and the high-speed AD and storing the image information into an FIFO inside the FPGA;
the ARM is used for reading the image information in the FPGA, calculating edge position information based on the image information and outputting the edge position information;
the light source control unit comprises a light source channel unit and a light source brightness selection unit, wherein the light source channel unit is used for selecting a light source channel, and the light source brightness selection unit is used for selecting light source brightness;
and the output display unit is used for outputting and displaying the edge position information calculated by the ARM and displaying keys of the device.
In order to realize communication among the units, in some embodiments of the application, the linear array CCD and the high-speed AD are both connected to the FPGA through an IO port, the FPGA and the ARM perform data exchange in an FSMC manner, and the light source control unit and the output display unit are both connected to the ARM through an IO port.
It should be noted that the model numbers of the FPGA and the ARM are not specifically limited in this embodiment, and therefore it should be understood that both the FPGA and the ARM chip that can implement the related functions in this embodiment should belong to the protection scope of this embodiment.
In order to realize the adjustability of the light source, in some embodiments of the present application, as shown in fig. 2, one end of the light source channel unit is connected to the ARM through an IO port, and the other end of the light source channel unit is connected to the driving light source, and the light source channel unit is controlled by the driving light source to select a light source color.
In order to realize the adjustment of the brightness of the light source, in some embodiments of the present application, the light source brightness selecting unit includes a third fet Q3, a fourth fet Q4, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, and an amplifier U1B,
a first end of the seventh resistor R7 is used as a PWM terminal to adjust the light source brightness of the light source brightness selection unit, a common junction of a second end of the seventh resistor R7 and a first end of the eighth resistor R8 is connected to a first end of the fifth capacitor C5, a second end of the fifth capacitor C5 is grounded, a common junction of a second end of the eighth resistor R8, a first end of the sixth capacitor C6, and a fifth end of the amplifier U1B is connected to a third end of the fourth field-effect transistor Q4, a common junction of a second end of the fourth field-effect transistor Q4 and a second end of the eleventh resistor R11 is grounded, a common junction of a second end of the fourth field-effect transistor Q4 and a first end of the eleventh resistor R11 is connected to the IO port, a common junction of a sixth end of the amplifier U1B and a second end of the seventh capacitor C7 is connected to the tenth resistor R10, a second end of the amplifier U1B and a second end of the seventh resistor R9 are connected to the second end of the seventh capacitor C7, a common junction of the amplifier U3 is connected to the twelfth end of the twelfth resistor R3, and a twelfth end of the amplifier U1B and a twelfth resistor R9 is connected to the twelfth resistor R12, and a second end of the twelfth resistor R3 is connected to the twelfth end of the twelfth resistor R3, and a twelfth resistor Q12, and a light source is connected to the light source brightness selection unit, and a light source brightness selection unit are connected to a controller, and a controller.
Correspondingly, the present invention further provides a coating edge detection method based on an adjustable light source, which is applied to the coating edge detection device based on an adjustable light source, as shown in fig. 3, and the method includes:
s101, driving a linear array CCD and acquiring image information of a coating edge through an FPGA (field programmable gate array) and storing the image information in an FIFO (first in first out) of the FPGA;
s102, reading the image information from the FIFO into an ARM through an FSMC, and calculating edge position information of the image information;
and S103, outputting and displaying the edge position information through an output display unit.
Specifically, as shown in fig. 3, the FPGA drives the linear array CCD and the high-speed AD, collects image information (i.e., image information of the coating edge), places the image information into the FIFO inside the FPGA, reads the image information through the FSMC bus, calculates edge position information through differentiation, and outputs the edge information through the CAN bus. When the material is used for the first time or the edge information changes, the current material is adapted through one-key calibration.
The selection of a three-color light source is realized through an IO port of the ARM, and the brightness of the light source is adjustable through the PWM of the ARM, so that the light source is built-in, the color is selectable, and the brightness is adjustable.
Through FPGA drive linear array CCD, rather than adopting original singlechip drive mode, the infertile problem of embedded calculation power of perfect solution like this makes output speed enough high simultaneously, examines the limit more stable, better solution the problem that the target loses easily, can satisfy the condition of high machine speed.
In some embodiments of the present application, the method further includes a one-key calibration mode, where the one-key calibration mode specifically includes:
when the coating edge detection device is used for the first time or the edge information changes, entering a one-key calibration mode through a key on the output display unit;
adjusting the light source channels and the light source brightness through a light source control unit, and recording the contrast of edge information of different light source channels and different brightness of the same light source channel;
and selecting the corresponding light source channel and light source brightness when the contrast ratio is maximum, and performing edge search on the current coating material based on the corresponding light source channel and light source brightness when the contrast ratio is maximum.
Specifically, after a calibration key is pressed down, the contrast of edge information of different light source channels and the same light source channel with different brightness is recorded, after different brightness of all the channels is traversed, the channel with the maximum corresponding contrast and the brightness value are searched, edge searching is carried out on the current material according to the brightness value of the channel, through one-key calibration, the light source and the image are associated in the device, the light source is automatically adjustable, the light source adjustment is associated with the CCD image contrast, the problem of complex operation is solved, and the field is easier to use.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand 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 depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (6)
1. An adjustable light source-based coating edge detection device, the device comprising:
the linear array CCD and the high-speed AD are used for acquiring image information of a coating edge;
the FPGA field programmable gate array is used for driving the linear array CCD and the high-speed AD and storing the image information into an FIFO (first in first out) in the FPGA;
the ARM is used for reading the image information in the FPGA, calculating edge position information based on the image information and outputting the edge position information;
the light source control unit comprises a light source channel unit and a light source brightness selection unit, wherein the light source channel unit is used for selecting a light source channel, and the light source brightness selection unit is used for selecting light source brightness;
and the output display unit is used for outputting and displaying the edge position information calculated by the ARM and displaying keys of the device.
2. The coating edge detection device based on the adjustable light source as claimed in claim 1, wherein the linear array CCD and the high-speed AD are both connected to the FPGA through an IO port, the FPGA and the ARM perform data exchange through an FSMC mode, and the light source control unit and the output display unit are both connected to the ARM through an IO port.
3. The coating edge detection device based on the adjustable light source as claimed in claim 1, wherein one end of the light source channel unit is connected to the ARM through an IO port, and the other end is connected to a driving light source, and the light source channel unit is controlled by the driving light source to select a light source color.
4. The coating edge detection device based on adjustable light source as claimed in claim 1,
the light source brightness selection unit comprises a third field effect tube, a fourth field effect tube, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor and an amplifier,
a first end of the seventh resistor is used as a PWM terminal to adjust the light source brightness of the light source brightness selection unit, a common junction of a second end of the seventh resistor and a first end of the eighth resistor is connected to a first end of the fifth capacitor, a second end of the fifth capacitor is grounded, a common junction of a second end of the eighth resistor, a first end of the sixth capacitor and a fifth end of the amplifier is connected to a third end of the fourth field-effect transistor, a second end of the fourth field-effect transistor and a common junction of a second end of the eleventh resistor are grounded, a common junction of a second end of the fourth field-effect transistor and a first end of the eleventh resistor is connected to an IO port of the ARM, a common junction of a sixth end of the amplifier and a second end of the seventh capacitor is connected to the tenth resistor, a common junction of a seventh end of the amplifier and a first end of the ninth resistor is connected to a first end of the seventh capacitor, a second end of the ninth resistor is connected to a first end of the third field-effect transistor, a second end of the third resistor is connected to a second end of the driving circuit, a second end of the ninth resistor is connected to a twelfth terminal of the driving circuit, and a twelfth terminal of the twelfth resistor are connected to the twelfth resistor.
5. An adjustable light source based coating edge detection method, which is applied to an adjustable light source based coating edge detection device according to any one of claims 1-4, and comprises:
collecting image information of a coating edge through an FPGA driving linear array CCD and a high-speed AD, and storing the image information in an FIFO of the FPGA;
reading the image information from the FIFO into an ARM through an FSMC, and calculating edge position information of the image information;
and outputting and displaying the edge position information through an output display unit.
6. The method of claim 5, further comprising a one-touch calibration mode, the one-touch calibration mode being specifically:
when the coating edge detection device is used for the first time or the edge information changes, entering a one-key calibration mode through a key on the output display unit;
adjusting the light source channels and the light source brightness through a light source control unit, and recording the contrast of edge information of different light source channels and the same light source channel at different brightness;
and selecting the corresponding light source channel and light source brightness when the contrast is maximum, and searching the edge of the current coating material based on the corresponding light source channel and light source brightness when the contrast is maximum.
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