CN116441129A - Glue thickness detection method and device - Google Patents
Glue thickness detection method and device Download PDFInfo
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- CN116441129A CN116441129A CN202310340618.1A CN202310340618A CN116441129A CN 116441129 A CN116441129 A CN 116441129A CN 202310340618 A CN202310340618 A CN 202310340618A CN 116441129 A CN116441129 A CN 116441129A
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- 238000001514 detection method Methods 0.000 title claims abstract description 164
- 239000003292 glue Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 10
- 238000006467 substitution reaction Methods 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000013528 artificial neural network Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
- B05C11/1005—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material already applied to the surface, e.g. coating thickness, weight or pattern
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
The embodiment of the invention discloses a glue thickness detection method and device. The glue thickness detection method comprises the following steps: acquiring a plurality of detection data of slicing positions of glue and detection data of positions to be detected; wherein the detection data includes a thickness; performing curve fitting on the plurality of detection data according to the plurality of detection data to obtain a curve equation; and determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected. The glue thickness detection method and device provided by the embodiment of the invention can improve the detection reliability.
Description
Technical Field
The embodiment of the invention relates to a glue thickness detection technology, in particular to a glue thickness detection method and device.
Background
In the circuit, the circuit board and devices such as chips and the like on the circuit board are required to be fixed by dispensing, so that the automatic production is facilitated. Glue thickness detection is an important component of dispensing, and if the glue thickness detection is inaccurate, normal operation of the device may be affected. Therefore, reliable detection of the glue thickness is required.
At present, the existing glue thickness detection method is generally to directly carry out optical detection on glue to obtain the glue thickness, and for light-transmitting and thinner glue, the glue thickness detected by the optical detection mode is inaccurate, and the detection reliability is lower.
Disclosure of Invention
The embodiment of the invention provides a glue thickness detection method and device, which are used for improving the detection reliability.
In a first aspect, an embodiment of the present invention provides a method for detecting a thickness of glue, including:
acquiring a plurality of detection data of slicing positions of glue and detection data of positions to be detected; wherein the detection data includes a thickness;
performing curve fitting on the plurality of detection data according to the plurality of detection data to obtain a curve equation;
and determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected.
Optionally, performing curve fitting on the plurality of detection data according to the plurality of detection data to obtain a curve equation, including:
substituting a plurality of detection data into a function in a preset mathematical modeling algorithm;
and performing curve fitting based on the function to obtain a curve equation.
Optionally, performing curve fitting based on the function to obtain a curve equation, including:
performing curve fitting based on the function to obtain a fourth-order polynomial equation;
the fourth order polynomial equation is taken as a curve equation.
Optionally, determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected includes:
substituting the detection data of the position to be detected into a curve equation to obtain an equation value;
the equation value is taken as the actual thickness of the position to be detected.
Optionally, the plurality of curve equations are used to determine the actual thickness of the position to be detected according to the curve equations and the detection data of the position to be detected, including:
carrying out root mean square calculation on values obtained according to a plurality of curve equations to obtain a calculation result;
and taking the calculated result as the actual thickness of the position to be detected.
Optionally, the curve equation is y=p1×χ≡4+p2×ζ≡3+p3×ζ ζ ζ++p5, where p1-p5 are coefficients, x is the detection data of the position to be detected, and y is the actual thickness of the position to be detected.
Optionally, the glue is a light-transmitting glue.
In a second aspect, an embodiment of the present invention provides a glue thickness detecting device, including:
the data acquisition module is used for acquiring a plurality of detection data of the slicing position of the glue and detection data of the position to be detected; wherein the detection data includes a thickness;
the equation determining module is used for performing curve fitting on the plurality of detection data according to the plurality of detection data to obtain a curve equation;
and the thickness determining module is used for determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected.
Optionally, the equation determining module includes:
the data substitution unit is used for substituting a plurality of detection data into a function in a preset mathematical modeling algorithm;
and the equation determining unit is used for performing curve fitting based on the function to obtain a curve equation.
Optionally, the equation determining unit includes:
the first equation determining subunit is used for performing curve fitting based on the function to obtain a fourth-order polynomial equation;
the second equation determining subunit is configured to take the fourth order polynomial equation as a curve equation.
The method and the device for detecting the thickness of the glue provided by the embodiment of the invention comprise the following steps: acquiring a plurality of detection data of slicing positions of glue and detection data of positions to be detected; wherein the detection data includes a thickness; performing curve fitting on the plurality of detection data according to the plurality of detection data to obtain a curve equation; and determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected. According to the glue thickness detection method and device provided by the embodiment of the invention, the actual thickness of the position to be detected is determined according to the curve equation obtained by curve fitting the detection data and the detection data of the position to be detected, and compared with the existing mode of directly optically detecting the glue to obtain the glue thickness, the glue thickness detection method and device solve the problem of inaccurate glue thickness detected by the optical detection mode of the light-transmitting glue, so that the detection reliability is improved.
Drawings
Fig. 1 is a flowchart of a glue thickness detecting method according to a first embodiment of the present invention;
fig. 2 is a flowchart of a glue thickness detecting method according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of detection data and actual data according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of a fitting curve according to a second embodiment of the present invention;
fig. 5 is a block diagram of a glue thickness detecting device according to a third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of a glue thickness detecting method according to an embodiment of the present invention, where the method is applicable to detecting thickness of glue, such as light-transmissive glue, and the method may be performed by a glue thickness detecting device, where the device may be implemented in software and/or hardware, and where the device may be integrated in an electronic apparatus, such as a computer, having a function of detecting glue thickness, and the method specifically includes the following steps:
step 110, acquiring a plurality of detection data of slicing positions of glue and detection data of positions to be detected; wherein the detection data comprises a thickness.
Specifically, the detection data may be obtained by optical detection, and the plurality of detection data of the slicing position may be detection data of slicing positions of a plurality of glues with different thicknesses. And (3) slicing the glue, and measuring the actual thickness of the sliced position after slicing the glue.
Illustratively, the plurality of detection data and the corresponding actual data are shown in table 1. The sensed data may be a sensed thickness and the actual data may be an actual thickness in microns.
Table 1 test data and actual data
And 120, performing curve fitting on the plurality of detection data according to the plurality of detection data to obtain a curve equation.
The curve equation may be a four-time equation, and the detected data in table 1 may be curve-fitted to obtain a curve equation such as y=p1×x≡4+p2×x≡3+p3×x≡2+p4×x+p5, where p1-p5 are coefficients, the values of p1-p5 are determined during curve fitting, x is the detected data of the position to be detected, and y is the actual thickness of the position to be detected.
And 130, determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected.
Specifically, the detection data of the position to be detected is substituted into the curve equation, the obtained numerical value is closer to the actual data, and the error between the numerical value and the actual data is smaller, so that the actual thickness of the glue is obtained through the detection data. For light-transmitting glue, if the thickness obtained by directly using optical detection is inaccurate, and the detection data are substituted into a fitted curve equation, the obtained value can be used as the value of the actual thickness of the glue, and the detection result is accurate.
The glue thickness detection method provided by the embodiment comprises the following steps: acquiring a plurality of detection data of slicing positions of glue and detection data of positions to be detected; wherein the detection data includes a thickness; performing curve fitting on the plurality of detection data according to the plurality of detection data to obtain a curve equation; and determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected. According to the glue thickness detection method, the actual thickness of the position to be detected is determined according to the curve equation obtained by curve fitting of the detection data and the detection data of the position to be detected, and compared with the existing mode of directly optically detecting the glue to obtain the glue thickness, the glue thickness detection method solves the problem that the glue thickness detected by the optical detection mode of the light-transmitting glue is inaccurate, and therefore detection reliability is improved.
Example two
Fig. 2 is a flowchart of a glue thickness detecting method according to a second embodiment of the present invention, where the method is applicable to detecting the thickness of glue, such as light-transmissive glue, and the method may be performed by a glue thickness detecting device, which may be implemented in software and/or hardware, and the device may be integrated in an electronic device, such as a computer, having a function of detecting the glue thickness, and the method specifically includes the following steps:
step 210, acquiring a plurality of detection data of slicing positions of glue and detection data of positions to be detected; wherein the detection data comprises a thickness.
Specifically, the detection data may be obtained by optical detection, and the plurality of detection data of the slicing position may be detection data of slicing positions of a plurality of glues with different thicknesses. And (3) slicing the glue, and measuring the actual thickness of the sliced position after slicing the glue.
Fig. 3 is a schematic diagram of detection data and actual data according to a second embodiment of the present invention. Referring to fig. 3, there are a plurality of detection data and actual data (in microns), each detection data has its own corresponding actual data, and there is a certain error between the detection data and the corresponding actual data.
Step 220, substituting the plurality of detection data into a function in a preset mathematical modeling algorithm.
The function in the preset mathematical modeling algorithm may be an nftool function or a polyfit function in Matlab, for example. The nftool function is based on neural network to perform function fitting, and can realize simple neural network fitting of complex reality functions. The polyfit function is a function used for curve fitting in matlab, and curve fitting is performed based on the principle of least square curve fitting.
And 230, performing curve fitting based on the function to obtain a fourth-order polynomial equation.
Specifically, curve fitting is to construct an analytical function (whose graph is a curve) at known discrete points, i.e., known function values at the point set, so that the values at the original discrete points are as close as possible to a given value. Compared with linear fitting, the curve fitting selects proper curve type to fit the data, and the obtained result is more accurate. Fig. 4 is a schematic diagram illustrating a fitting curve according to a second embodiment of the present invention. Referring to fig. 4, curve fitting obtains the equation y=p1×x≡4+p2×x≡3+p3×x ζ 2+p4×x++p5, where p1-p5 are coefficients, the values of p1-p5 are determined at the time of curve fitting, x is the detection data of the position to be detected, y is the actual thickness of the position to be detected, and the units of x and y are micrometers.
It should be noted that the above equations and the number of the equations are only illustrative, and may be specifically determined according to the actual detection requirement, and are not limited herein.
And 240, taking the fourth-order polynomial equation as a curve equation.
And 250, substituting the detection data of the position to be detected into a curve equation to obtain an equation value.
For example, p1 = -0.0007066, p2= 0.02582, p3 = -0.3722, p4=3.257, p5 = -2.306 in the above equation, and substituting the detected data of the position to be detected, such as 12.356, into the above equation y = -0.0007066 x≡+0.02582 x≡3-0.3722 x≡2+3.257 x-2.306, yields y of about 13.35065.
It should be noted that the values of p1-p5 are only illustrative, and are specifically determined according to the actual fitting requirement, and are not limited herein.
Step 260, taking the equation value as the actual thickness of the position to be detected.
Specifically, substituting the above detection data 12.356 into the equation to obtain y about 13.35065 can take 13.35065 as the actual thickness of the position to be detected. In one embodiment, for the same detection position of the glue, different detection data can be acquired for multiple times through different exposure parameters of the 3D camera, all the detection data are divided into multiple groups, each group is provided with a plurality of detection data, the detection data are fitted by taking the groups as units, each group of detection data are fitted to obtain respective corresponding curve equations, and the multiple groups of detection data are fitted to obtain multiple curve equations. And substituting the detection data of the position to be detected into each curve equation to obtain a numerical value, wherein a plurality of curve equations correspond to a plurality of numerical values. Performing root mean square calculation on a plurality of numerical values obtained according to a plurality of curve equations to obtain a calculation result so as to enable the calculation result to be more accurate; and taking the calculation result as the actual thickness of the position to be detected, thereby further improving the detection reliability.
The glue thickness detection method provided by the embodiment comprises the following steps: acquiring a plurality of detection data of slicing positions of glue and detection data of positions to be detected; wherein the detection data includes a thickness; substituting the detection data into a function in a preset mathematical modeling algorithm, performing curve fitting based on the function to obtain a fourth-order polynomial equation, and taking the fourth-order polynomial equation as a curve equation; substituting the detection data of the position to be detected into a curve equation to obtain an equation value, and taking the equation value as the actual thickness of the position to be detected. According to the glue thickness detection method, the actual thickness of the position to be detected is determined according to the curve equation obtained by curve fitting of the detection data and the detection data of the position to be detected, and compared with the existing mode of directly optically detecting the glue to obtain the glue thickness, the glue thickness detection method solves the problem that the glue thickness detected by the optical detection mode of the light-transmitting glue is inaccurate, and therefore detection reliability is improved.
Example III
Fig. 5 is a block diagram of a glue thickness detecting device according to a third embodiment of the present invention. Glue thickness detection device includes: a data acquisition module 310, an equation determination module 320, and a thickness determination module 330. The data acquisition module 310 is configured to acquire a plurality of detection data of a slicing position of the glue and detection data of a position to be detected; wherein the detection data includes a thickness; the equation determining module 320 is configured to perform curve fitting on the plurality of detection data according to the plurality of detection data, so as to obtain a curve equation; the thickness determining module 330 is configured to determine an actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected.
Alternatively, the equation determination module 320 includes: a data substitution unit and an equation determination unit; the data substitution unit is used for substituting a plurality of detection data into a function in a preset mathematical modeling algorithm; and the equation determining unit is used for performing curve fitting based on the function to obtain a curve equation.
Optionally, the equation determining unit includes: a first equation determination subunit and a second equation determination subunit; the first equation determining subunit is used for performing curve fitting based on a function to obtain a fourth-order polynomial equation; the second equation determining subunit is configured to use the fourth order polynomial equation as a curve equation.
In one embodiment of the present invention, in one embodiment, thickness determination module 330 includes data substitution unit and thickness determination unit; the data substitution unit is used for substituting the detection data of the position to be detected into a curve equation to obtain an equation value; the thickness determination unit is used for taking the equation value as the actual thickness of the position to be detected.
Optionally, the curve equation is multiple, and the thickness determining module 330 includes a calculating unit and a thickness determining unit; the computing unit is used for carrying out root mean square computation on values obtained according to a plurality of curve equations to obtain a computing result; the thickness determining unit is used for taking the calculation result as the actual thickness of the position to be detected.
Wherein, the curve equation is y=p1×x4+p2×x3+p3×x2+p4×x+p5, wherein, p1-p5 are coefficients, x is the detection data of the position to be detected, and y is the actual thickness of the position to be detected.
The glue thickness detection device provided in this embodiment belongs to the same inventive concept as the glue thickness detection method provided in any embodiment of the present invention, and has corresponding beneficial effects, and technical details not shown in detail in this embodiment are not shown in detail in the glue thickness detection method provided in any embodiment of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. The glue thickness detection method is characterized by comprising the following steps of:
acquiring a plurality of detection data of slicing positions of glue and the detection data of positions to be detected; wherein the detection data includes a thickness;
performing curve fitting on the plurality of detection data according to the plurality of detection data to obtain a curve equation;
and determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected.
2. The glue thickness detection method according to claim 1, wherein the performing curve fitting on the plurality of detection data according to the plurality of detection data to obtain a curve equation includes:
substituting the plurality of detection data into a function in a preset mathematical modeling algorithm;
and performing curve fitting based on the function to obtain a curve equation.
3. The glue thickness detection method according to claim 2, wherein the performing curve fitting based on the function to obtain a curve equation comprises:
performing curve fitting based on the function to obtain a fourth-order polynomial equation;
and taking the fourth order polynomial equation as the curve equation.
4. The glue thickness detection method according to claim 1, wherein determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected comprises:
substituting the detection data of the position to be detected into the curve equation to obtain an equation value;
and taking the equation value as the actual thickness of the position to be detected.
5. The glue thickness detection method according to claim 1, wherein the curve equation is a plurality of, and the determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected includes:
carrying out root mean square calculation on the values obtained according to the curve equations to obtain a calculation result;
and taking the calculation result as the actual thickness of the position to be detected.
6. The method according to claim 1, wherein the curve equation is y=p1×χ≡4+p2×χ ζ ζ+p3×χ ζ ζ+p4×ζ+p5, wherein p1-p5 are coefficients, x is the detection data of the position to be detected, and y is the actual thickness of the position to be detected.
7. The glue thickness detection method according to claim 1, wherein the glue is a light transmissive glue.
8. Glue thickness detection device, characterized in that includes:
the data acquisition module is used for acquiring a plurality of pieces of detection data of slicing positions of the glue and the detection data of positions to be detected; wherein the detection data includes a thickness;
the equation determining module is used for performing curve fitting on the plurality of detection data according to the plurality of detection data to obtain a curve equation;
and the thickness determining module is used for determining the actual thickness of the position to be detected according to the curve equation and the detection data of the position to be detected.
9. The glue thickness detection device of claim 8, wherein the equation determination module comprises:
the data substitution unit is used for substituting the detection data into a function in a preset mathematical modeling algorithm;
and the equation determining unit is used for carrying out curve fitting based on the function to obtain a curve equation.
10. The glue thickness detection device of claim 9, wherein the equation determination unit comprises:
the first equation determining subunit is used for performing curve fitting based on the function to obtain a fourth-order polynomial equation;
a second equation determining subunit, configured to take the fourth order polynomial equation as the curve equation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310340618.1A CN116441129A (en) | 2023-03-31 | 2023-03-31 | Glue thickness detection method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310340618.1A CN116441129A (en) | 2023-03-31 | 2023-03-31 | Glue thickness detection method and device |
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| CN116441129A true CN116441129A (en) | 2023-07-18 |
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| CN202310340618.1A Pending CN116441129A (en) | 2023-03-31 | 2023-03-31 | Glue thickness detection method and device |
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