阅读说明：本技术 一种手机玻璃外形及显示区域尺寸的测量方法及装置 (Method and device for measuring appearance and display area size of mobile phone glass ) 是由 温天雨 于 2020-09-21 设计创作，主要内容包括：本发明公开了一种手机玻璃外形及显示区域尺寸的测量方法及装置,涉及手机测量技术领域,包括摄像机、影像匹配装置、OVM影像测量装置,摄像机用于将玻璃外形拍摄植入测量区域的界面,影像匹配装置用于搜索寻找产品特有的边缘或区域,建立第一坐标系,OVM影像测量装置用于测量产品外形得到边缘线,准确建立第二坐标系和将各个轮廓的坐标点导入第二坐标系,对每个导入轮廓的坐标点,设置矢量方向I和J,并计算输出矢量i和j的结果,得到轮廓值,本发明可快速实现手机玻璃外形装配尺寸全检、手机玻璃显示区域尺寸及非标准圆R角轮廓匹配度的全检,并实现数据数据化,从而拦截不良品流出,既能提高检测效率,还适应于大批量的玻璃检验作业。(The invention discloses a method and a device for measuring the appearance and the size of a display area of mobile phone glass, which relate to the technical field of mobile phone measurement and comprise a camera, an image matching device and an OVM image measuring device, wherein the camera is used for shooting the appearance of the glass and implanting the glass into an interface of the measurement area, the image matching device is used for searching and searching the special edge or area of a product, establishing a first coordinate system, the OVM image measuring device is used for measuring the appearance of the product to obtain an edge line, accurately establishing a second coordinate system and leading coordinate points of each outline into the second coordinate system, setting vector directions I and J for each coordinate point leading in the outline, calculating the results of output vectors I and J to obtain an outline value, the invention can quickly realize the complete detection of the assembly size of the appearance of the mobile phone glass, the complete detection of the size of the display area of the mobile phone glass and the matching degree of the outline of a non-standard circle R angle, and realize, therefore, the outflow of defective products is intercepted, the detection efficiency can be improved, and the method is also suitable for large-batch glass inspection operation.)

1. A method for measuring the appearance and the size of a display area of mobile phone glass is characterized by comprising the following steps:

s1: firstly, shooting the glass shape and implanting the glass shape into an interface of a measurement area;

s2: searching for product edges or areas in the measuring area;

s3: successively establishing a first coordinate system and a second coordinate system in the measuring area;

s4: measuring and acquiring a coordinate point of an R angle outline of the edge of the mobile phone glass and a coordinate point of an R angle of a display area of the mobile phone glass based on a second coordinate system;

s5: leading the coordinate point of the R angle outline of the edge of the mobile phone glass and the coordinate point of the R angle of the display area of the mobile phone glass into a second coordinate system;

s6: and setting vector directions I and J for each imported coordinate point, and calculating the results of output vectors I and J to obtain a contour value.

2. The method as claimed in claim 1, wherein in step S2, the edge or area of the product is found by searching with an image matching device.

3. The method as claimed in claim 2, wherein the image matching device searches for the edge or area of the product based on the matching method of the product features.

4. The method as claimed in claim 1, wherein the first coordinate system is established based on a lens hole center position of the product edge.

5. The method as claimed in claim 4, wherein the second coordinate system is established based on the first coordinate system, the second coordinate system is parallel to the first coordinate system, and the origin of the second coordinate system is the symmetric center of the product.

6. The method for measuring the shape and the size of the display area of the mobile phone glass according to claim 5, wherein the step of establishing the second coordinate system comprises the steps of:

s31: measuring the product appearance to obtain edge points a1, a2 and a3, and fitting the edge points a1, a2 and a3 into a linear bar AA;

s32: measuring the product appearance to obtain edge points b1, b2 and b3, and simulating the edge points b1, b2 and b3 into a line BB;

s33: measuring the product appearance to obtain edge points c1 and c2, and fitting the edge points c1 and c2 into a line CC;

s34: measuring the product appearance to obtain edge points d1 and d2, and fitting the edge points d1 and d2 into a linear DD;

s35: dividing the lines AA and BB into lines AB by a centering tool;

s36: dividing the lines CC and DD into CD lines by a dividing tool;

s37: intersecting the AB line and the CD line to be used as a central midpoint of a coordinate system;

s38: and correcting the X axis by using the AB line to establish a second coordinate system.

7. The method as claimed in claim 6, wherein the OVM image measuring device measures the product profile to obtain the edge points a1, a2, a3, b1, b2, b3, c1, c2, d1 and d 2.

8. The method for measuring the shape and the size of the display area of the mobile phone glass according to claim 1, wherein the steps of obtaining the coordinate point of the R-angle contour of the edge of the mobile phone glass and the coordinate point of the R-angle of the display area of the mobile phone glass are as follows:

s41: under a second coordinate system, firstly measuring the shape length and the shape width of the mobile phone glass, the window length and the window width of a display area and the distance from the window to the edge;

s42: and fitting the shape length and the shape width of the mobile phone glass, the window length and the window width of the display area and the distance from the window to the edge into a coordinate point of the R angle outline of the edge of the mobile phone glass and a coordinate point of the R angle of the display area of the mobile phone glass.

9. The method as claimed in claim 1, wherein in step S5, if the product has a camera hole, the coordinate points corresponding to the size of the camera hole and the distance from the center of the camera hole to the edge of the glass are introduced into the second coordinate system.

10. The method for measuring the shape and the size of the display area of the mobile phone glass as claimed in claim 9, wherein in step S6, the formula for calculating the profile value is as follows:

11. the utility model provides a measuring device of cell-phone glass appearance and display area size which characterized in that includes:

the camera is used for shooting the appearance of the glass and implanting the glass into an interface of a measurement area;

image matching device: the image matching device is used for searching and searching the edge or the area of a product, so that a first coordinate system can be conveniently and accurately established;

OVM image measuring device: the OVM image measuring device is used for measuring the appearance of a product to obtain edge points a1, a2, a3, b1, b2, b3, c1, c2, d1 and d2, and is convenient for accurately establishing a second coordinate system and guiding each coordinate point into the second coordinate system.

Technical Field

The invention relates to the technical field of mobile phone measurement, in particular to a method and a device for measuring the appearance and the display area size of mobile phone glass.

Background

The mobile phone touch screen glass is mainly used for a mobile phone touch screen panel, the main component of the mobile phone touch screen glass is silicon dioxide, the chemical component on the surface of the glass is improved by an ion exchange method, the purpose of glass strengthening is achieved, and the main performance is reflected by the stress Depth (DOL) and the stress value (CS). Glass brands currently used in the field of mobile phone covers include xu glass, Longdao glass, NEG glass, kangning glass, and the like. The mobile phone glass display area is mainly realized by the combination of a standard film and a screen plate through screen printing and pad printing ink. The mobile phone cover plate glass has the characteristics of high finish degree, high hardness, high strength and the like, but the appearance size of the glass is not good under the influence of factors such as CNC cutting tool abrasion, polishing material abrasion and the like. Along with various requirements of consumers on the mobile phone display area, the mobile phone display area is changed from a rectangle shape into an irregular shape close to the appearance of mobile phone glass, so that the difficulty in the production process is greatly increased, and the reject ratio is increased.

And the overall dimension of the glass and the dimension of the glass display area are measured by amplifying and dotting and routing through an OVM two-dimensional measuring machine. And amplifying and comparing the outline of the glass and the outline of the display area by adopting an OVM (over-the-horizon) quadratic element measuring machine, and measuring the coincidence between a product design drawing file and an actual product, thereby judging whether the product is qualified or not, wherein the measuring speed is low, and the operation is duplicated. The defective rate of the product size and the irregularity of the window size greatly increase the difficulty of production and the defective rate, so that the product size can be ensured to be qualified by 100 percent only by full inspection.

In the traditional glass appearance full-inspection method, shell assembly clamping control is adopted, and if all shell assemblies are adopted, a protective film must be torn off, so that products are scratched inevitably, and the defective products are increased. If the outline of the display area is measured by two-dimensional amplification comparison film, a large number of two-dimensional machines are inevitably added, so that the machine and labor costs are increased. The two methods have the defects of poor measurement time and full inspection and very high labor and machine cost.

Disclosure of Invention

In order to overcome the defects of the prior art, the method and the device for measuring the appearance and the size of the display area of the mobile phone glass can quickly realize the full inspection of the appearance assembly size of the mobile phone glass and the full inspection of the size of the display area of the mobile phone glass and the matching degree of the R-angle outline of the non-standard circle.

The technical scheme adopted by the invention for solving the technical problems is as follows: the improvement of a method for measuring the appearance and the size of a display area of mobile phone glass, which comprises the following steps:

s1: firstly, shooting the glass shape and implanting the glass shape into an interface of a measurement area;

s2: searching for product edges or areas in the measuring area;

s3: successively establishing a first coordinate system and a second coordinate system in the measuring area;

s4: measuring and acquiring a coordinate point of an R angle outline of the edge of the mobile phone glass and a coordinate point of an R angle of a display area of the mobile phone glass based on a second coordinate system;

s5: leading the coordinate point of the R angle outline of the edge of the mobile phone glass and the coordinate point of the R angle of the display area of the mobile phone glass into a second coordinate system;

s6: and setting vector directions I and J for each imported coordinate point, and calculating the results of output vectors I and J to obtain a contour value.

As a further improvement of the above technical solution, in step S2, the image matching device is used to search and find the edge or area of the product.

As a further improvement of the above technical solution, the image matching device searches for and finds the edge or area of the product based on the matching mode of the product features.

As a further improvement of the technical scheme, a first coordinate system is established based on the center position of the lens hole at the edge of the product.

As a further improvement of the above technical solution, the second coordinate system is established based on the first coordinate system, the second coordinate system is parallel to the first coordinate system, and an origin of the second coordinate system is a symmetric center point of the product in the vertical and horizontal directions.

As a further improvement of the above technical solution, the specific steps of establishing the second coordinate system are as follows:

s31: measuring the product appearance to obtain edge points a1, a2 and a3, and fitting the edge points a1, a2 and a3 into a linear bar AA;

s32: measuring the product appearance to obtain edge points b1, b2 and b3, and simulating the edge points b1, b2 and b3 into a line BB;

s33: measuring the product appearance to obtain edge points c1 and c2, and fitting the edge points c1 and c2 into a line CC;

s34: measuring the product appearance to obtain edge points d1 and d2, and fitting the edge points d1 and d2 into a linear DD;

s35: dividing the lines AA and BB into lines AB by a centering tool;

s36: dividing the lines CC and DD into CD lines by a dividing tool;

s37: intersecting the AB line and the CD line to be used as a central midpoint of a coordinate system;

s38: and correcting the X axis by using the AB line to establish a second coordinate system.

As a further improvement of the technical scheme, the outline of the product is measured by an OVM image measuring device to obtain edge points a1, a2, a3, b1, b2, b3, c1, c2, d1 and d 2.

As a further improvement of the above technical solution, the steps of obtaining a coordinate point of an R-angle contour of the edge of the mobile phone glass and a coordinate point of an R-angle of the display area of the mobile phone glass are as follows:

s41: under a second coordinate system, firstly measuring the shape length and the shape width of the mobile phone glass, the window length and the window width of a display area and the distance from the window to the edge;

s42: and fitting the shape length and the shape width of the mobile phone glass, the window length and the window width of the display area and the distance from the window to the edge into a coordinate point of the R angle outline of the edge of the mobile phone glass and a coordinate point of the R angle of the display area of the mobile phone glass.

As a further improvement of the above technical solution, in step S5, if the product has a camera hole, a coordinate point corresponding to the size of the camera hole and the distance from the center of the camera hole to the edge of the glass is introduced into the second coordinate system.

As a further improvement of the above technical solution, in step S6, the formula for calculating the contour value is as follows:

the improvement of a device for measuring the appearance and the size of a display area of mobile phone glass, which comprises:

the camera is used for shooting the appearance of the glass and implanting the glass into an interface of a measurement area;

image matching device: the image matching device is used for searching and searching the edge or the area of a product, so that a first coordinate system can be conveniently and accurately established;

OVM image measuring device: the OVM image measuring device is used for measuring the appearance of a product to obtain edge points a1, a2, a3, b1, b2, b3, c1, c2, d1 and d2, and is convenient for accurately establishing a second coordinate system and guiding each coordinate point into the second coordinate system.

The invention has the beneficial effects that: the mobile phone glass appearance assembly size full inspection, the mobile phone glass display area size and the non-standard circle R-angle contour matching degree full inspection can be quickly realized, and data datamation is realized, so that the outflow of defective products is intercepted, the detection efficiency can be improved, and the method is suitable for large-batch glass inspection operation.

Drawings

FIG. 1 is a perspective view of a glass cell phone implanted in a measurement area;

FIG. 2 is a panoramic view of a glass of a mobile phone without adjusting the light;

FIG. 3 is a panoramic view of the glass of the mobile phone with the light adjusted;

FIG. 4 is a schematic diagram of establishing a first coordinate system and a second coordinate system;

FIG. 5 is a schematic structural diagram of edge points of the mobile phone glass profile fitted into lines;

FIG. 6 is a schematic diagram of the structure of each dimension length in the glass display area of the mobile phone;

fig. 7 is a schematic structural diagram of the set vector direction of the mobile phone.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.

Referring to fig. 1, the invention discloses a method for measuring the shape and the size of a display area of a mobile phone glass, comprising the following steps:

s1: firstly, shooting the glass shape and implanting the glass shape into an interface of a measurement area;

s2: in the measuring area, searching and finding the edge or the area of the product by using an image matching device, wherein the image matching device searches and finds the edge or the area of the product based on a matching mode of product characteristics;

s3: successively establishing a first coordinate system and a second coordinate system in the measuring area;

s4: measuring and acquiring a coordinate point of an R angle outline of the edge of the mobile phone glass and a coordinate point of an R angle of a display area of the mobile phone glass based on a second coordinate system;

s5: leading a coordinate point of an R angle outline of the edge of the mobile phone glass and a coordinate point of an R angle of a display area of the mobile phone glass into a second coordinate system, if the product is provided with a camera hole, leading the coordinate point corresponding to the size of the camera hole and the distance from the center of the camera hole to the edge of the glass into the second coordinate system;

s6: setting vector directions I and J for each imported coordinate point, and calculating the results of output vectors I and J, wherein the formula for calculating the contour value is as follows:and obtaining a contour value.

In the above embodiment, a large-field lens is used for taking a picture, the product is taken into an interface, when the product has a protective film, the light intensity is adjusted according to fig. 2-3, so that the light source can penetrate through the protective film, only an opaque screen printing surface of the mobile phone glass is left, in the measurement area, the edge or the area of the product is searched and found by using an image matching device, the edge or the area of the product is found by using the image matching device based on the matching mode of searching the product characteristics, the product characteristics refer to fig. 4, a first coordinate system and a second coordinate system are successively established based on the image matched with the product characteristics, the outline coordinate points of the R corner of the edge of the mobile phone glass and the coordinate points of the R corner of the display area of the mobile phone glass are led into the second coordinate system, if the product has a camera hole, the size of the camera hole and the coordinate points corresponding to the distance from the center of the, and setting vector directions I and J for each imported coordinate point, and outputting the results of the vectors I and J to obtain a contour value. Compared with the traditional shell assembly measurement, the image measurement of the non-tearing protective film does not contact the surface of the glass cover plate, and does not cause damage to the product; but also can simultaneously measure the size and the outline of the glass display area, can improve the efficiency and reduce the outflow of bad products.

Further, referring to fig. 5, a first coordinate system is established based on the lens hole center position of the product edge. The second coordinate system is established based on the first coordinate system, the second coordinate system is parallel to the first coordinate system, and the origin of the second coordinate system is the symmetric center point of the product in the vertical direction and the horizontal direction. The specific steps of establishing the second coordinate system are as follows:

s31: measuring the product shape by an OVM image measuring device to obtain edge points a1, a2 and a3, and fitting the edge points a1, a2 and a3 into a linear AA;

s32: measuring the product shape by an OVM image measuring device to obtain edge points b1, b2 and b3, and simulating the edge points b1, b2 and b3 into a line BB;

s33: measuring the product shape by an OVM image measuring device to obtain edge points c1 and c2, and fitting the edge points c1 and c2 into a linear CC;

s34: measuring the product shape by an OVM image measuring device to obtain edge points d1 and d2, and fitting the edge points d1 and d2 into a linear DD;

s35: dividing the lines AA and BB into lines AB by a centering tool;

s36: dividing the lines CC and DD into CD lines by a dividing tool;

s37: intersecting the AB line and the CD line to be used as a central midpoint of a coordinate system;

s38: and correcting the X axis by using the AB line to establish a second coordinate system.

In the above embodiment, since the first coordinate is established based on the graph for searching for feature matching in the measurement effective area, the first coordinate system will not fail due to angular deviation of the product placement, and since the second coordinate system is established based on the first coordinate, when the mobile phone glass is in the measurement effective area, the establishment of the second coordinate system will not be affected.

Further, the steps of obtaining the coordinate point of the R angle outline of the edge of the mobile phone glass and the coordinate point of the R angle of the display area of the mobile phone glass are as follows:

s41: under a second coordinate system, firstly measuring the shape length and the shape width of the mobile phone glass, the window length and the window width of a display area and the distance from the window to the edge, if a product is provided with a camera hole, measuring the size of the camera hole and the distance from the center of the camera hole to the edge of the glass;

s42: and fitting the shape length and the shape width of the mobile phone glass, the window length and the window width of the display area, the distance from the window to the edge, the size of the camera hole and the distance from the center of the camera hole to the edge of the glass into a coordinate point of the R angle outline of the mobile phone glass edge and a coordinate point of the R angle of the mobile phone glass display area.

The invention can rapidly measure the outline dimension of the glass and the dimension of the glass display area by image measurement to obtain the outline value of the glass under the condition of not tearing the protective film, and can rapidly check the outline of the glass cover plate and the dimension of the display area after the product is produced in large quantity, the product can be delivered after the dimension is qualified, and the product delivered to a customer is ensured to be completely qualified. And the image measurement that does not tear the protection film compares with traditional shell piece assembly measurement, does not have contact glass apron surface, can not cause the injury to the product, can measure glass display area's size and profile simultaneously again and plate, can raise the efficiency, reduce bad outflow.

A device for measuring the appearance and the size of a display area of mobile phone glass comprises:

the camera is used for shooting the appearance of the glass and implanting the glass into an interface of a measurement area;

image matching device: the image matching device is used for searching and searching the edge or the area of a product, so that a first coordinate system can be conveniently and accurately established;

OVM image measuring device: the OVM image measuring device is used for measuring the appearance of a product to obtain edge points a1, a2, a3, b1, b2, b3, c1, c2, d1 and d2, and is convenient for accurately establishing a second coordinate system and guiding each coordinate point into the second coordinate system.

The invention adopts the large-view lens of the camera to take a picture, firstly, the product is taken in front of an interface, under the condition that the product has a protective film, referring to a picture 2-3, the light intensity is adjusted, a light source can penetrate through the protective film, only an opaque mobile phone glass silk screen printing surface is left, in a measurement area, referring to a picture 4, the special edge or area of the product is searched and found by an image matching device according to the matching mode of the product characteristics, based on the figure of characteristic matching, a first coordinate system is established, referring to a picture 5, then the product appearance is measured to obtain edge points a1, a2 and a3, the edge points a1, a2 and a3 are fitted into a line AA to obtain edge points b1, b2 and b3, the edge points b1, b2 and b3 are fitted into a line BB to obtain edge points c1 and c2, the edge points c1 and c2 are fitted into a line CC to obtain edge points d1 and d2, and then are fitted into a line AA by line, BB, using the centering tool to divide into AB lines, then using lines CC and DD, using the centering tool to divide into CD lines, using the intersection of the AB lines and the CD lines as the center point of the coordinate system, and using the AB lines to forcibly correct the X axis, and establishing a second coordinate system.

Under a second coordinate system, referring to fig. 6, firstly measuring the shape length and the shape width of the mobile phone glass, measuring the window length, the window width and the window-to-edge distance of the mobile phone glass display area, and having a camera hole, or measuring the size and the groove depth of the camera hole, the ink edge distances of the peripheral edge of the product and the distance from the center of the camera hole to the edge of the glass, fitting into contour coordinate points of an R corner of the mobile phone glass edge and coordinate points of an R corner of the mobile phone glass display area, introducing the contour coordinate points of the R corner of the mobile phone glass edge and the coordinate points of the R corner of the mobile phone glass display area into the second coordinate system, setting vector directions I and J for each introduced coordinate point, referring to fig. 7, wherein fig. 7 is a structural schematic diagram of the set vector directions, and outputting vector I and J results to obtain a contour value.

The invention has the beneficial effects that: the mobile phone glass appearance assembly size full inspection, the mobile phone glass display area size and the non-standard circle R-angle contour matching degree full inspection can be quickly realized, and data datamation is realized, so that the outflow of defective products is intercepted, the detection efficiency can be improved, and the method is suitable for large-batch glass inspection operation.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.