KR102274955B1 - An Automatic Measurement System for the Perimeter of a Baseball by Vision Photography - Google Patents

Abstract

The present invention relates to a system for automatically measuring the circumference of a baseball through vision photography and, more specifically, to a system for automatically measuring the circumference of a baseball through vision photography, capable of automatically measuring the circumference of a baseball by dividing the circumference thereof into multiple parts in spite of unevenness formed by stitches through vision photography while supplying baseballs one by one after the completion of the manufacture of the baseballs, and classifying the baseballs as normal and abnormal baseballs based on measured circumference values, thereby automatically inspecting the circumferences of the baseballs through vision photography. According to the present invention, the system comprises: a vision module supplying a baseball and rotating the same 180 degrees, and radiating vision light to the baseball to photograph the same; a circumference value measurement monitor measuring and displaying a circumference value of the baseball photographed by the vision module; a vision kit total-control PLC calculating and sending the circumference value of the baseball photographed by the vision module; and a separate delivery module separately discharging baseballs, which are discharged after being determined as normal and defective baseballs by vision kit total-control PLC. In the vision module, a lens of a camera and vision lighting are installed to be inclined by an angle of 30-60 degrees to photograph a baseball.

Description

An Automatic Measurement System for the Perimeter of a Baseball by Vision Photography}

The present invention relates to a system for automatically measuring the circumference of a baseball by vision shooting, and more particularly, it divides the perimeter of the ball into multiple equal parts despite the formation of irregularities through seams through vision shooting while supplying each ball one after the completion of production. It relates to an automatic baseball circumference measurement system by vision imaging that automatically measures the circumference and classifies whether it is normal through the measured circumference value, so that the circumference of the ball can be automatically inspected through vision imaging.

Baseball, which was re-apopted as an official sport at the 2020 Summer Olympics, will be played with the official ball officially designated for each tournament or league. In general, a baseball is made by winding a thread on a small core made of cork, rubber or similar material, and wrapping two sides of white horseskin or cowhide.

When manufacturing a baseball, the quality of the batted ball is significantly different depending on the circumference, coefficient of restitution, and weight of the ball. That is, even if the pitcher throws the same pitch to the catcher according to the above-described plurality of variables, a home run may occur while the batted ball hit by the batter may result in a ground ball.

In order to solve the above problems, the steering committee of each league limits the value of the baseball variable to a specific range.

Today, due to the improvement of living standards, the number of people who directly enjoy sports as a leisure activity is increasing, and a representative example thereof is baseball. The number of people not only enjoying watching professional baseball, but also participating directly is increasing explosively.

A baseball is a ball used when playing baseball, and is made of cork, rubber, wool, or similar materials. Unlike soccer balls, which are made of white horseskin or cowhide for the outer part and dozens of pieces are joined together, baseballs are made by joining only two pieces together. Silver is about 141.7g ~ 148.8g, the circumference of the ball is 9 ~ 9.25 inches, about 22.9 ~ 23.5 cm, and it is divided into L, A, B, and C.

The circumference of a baseball (about 22.9 ~ 23.5 cm) has been judged whether it is normal by manually measuring the circumference using a tape measure, but any part of the 108 seams for a baseball is measured from any direction. Since the abnormality is covered, it is very difficult to check the exact circumference by the protruding stitches, and it is determined whether the circumference is normal by checking the circumference with a tape measure in the direction that intersects twice. The perimeter was spherical in all directions, and the length of the perimeter was not confirmed, so the safety of quality was not guaranteed.

As such, in the prior art, in order to indicate the accuracy of the circumference of a baseball, there was a problem in that it was not possible to determine the degree of deformation and pass or not, except by manually inspecting several times, so that it could not meet the contribution to stability of quality.

[Document 1] Patent Registration No. 2161773 (Registered on September 24, 2020) [Document 2] Patent Registration No. 1987368 (Registered on Jun. 03, 2019) [Document 3] Patent Registration No. 2129129 (Registered on June 25, 2020) [Document 4] Patent Registration No. 1764262 (Registered on July 27, 2017)

Therefore, the solution of the present invention is devised in order to solve these conventional drawbacks, supplying baseballs by arranging them so that they are supplied one by one, stopping the supplied baseballs and rotating them through a vision around the ball An object of the present invention is to provide a vision inspection device that inspects the perimeter by dividing it into hundreds.

Another object of the present invention is to measure and inspect the circumference of even the portion with the thread for sewing the leather of the baseball.

The present invention is a vision module that rotates 180 degrees by supplying a baseball and shoots a vision by illuminating the vision light; a perimeter measurement monitor indicating the perimeter value of the baseball photographed by the vision module; a vision kit total control PLC that calculates and sends the circumference value of the baseball photographed by the vision module; a division delivery module for dividing and discharging baseballs discharged after determining whether the entire vision kit control PLC has passed; made up of;
The vision module is characterized in that the lens and vision lighting of the camera are installed to shoot the baseball at an angle of 30 to 60 degrees.

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The present invention supplies and stores a plurality of baseballs, and the bottleneck is prevented through a baseball supply bottleneck prevention cylinder module, and a baseball alignment supply device for supplying to the supply port;

a baseball supply conveyor module for transferring the baseballs supplied to the supply port one by one and supplying the baseballs to the stopper module;

a vision module that receives the baseball and raises it, rotates it 180 degrees, returns it again, rotates it 180 degrees, and illuminates the vision light to take a picture;

a perimeter measurement monitor indicating the perimeter value of the baseball photographed by the vision module;

a vision kit total control PLC that calculates and sends the perimeter value of the baseball photographed by the vision module;

a division delivery module for dividing and discharging baseballs discharged after determining whether the entire vision kit control PLC has passed; It is characterized in that it includes.

The present invention does not interfere with the supply and prevents bottlenecks while supplying a plurality of baseballs to the base and storing them, aligning them to be supplied one by one, stopping the supplied baseballs, and then rotating through a vision that is installed obliquely This is to provide the effect of allowing accurate perimeter inspection through the vision inspection field that divides the perimeter of the ball into hundreds of equal parts and inspects the perimeter despite the fact that the seam is in one part of the trajectory.

The present invention can accurately measure the circumference (distance) of the baseball to the part where the leather is sewn and show it on the inspection screen. It is to provide the effect of improving the accuracy and reliability of the

1 is a perspective view of an installation state showing a preferred embodiment of the present invention;
2 is a block diagram showing an embodiment of a controller of the present invention;
3 is a front view showing the camera vision installation distance of the present invention
Figure 4a is a front view of the installation state showing the camera vision shooting angle of the present invention;
Figure 4b is a plan view of the installation state showing the camera vision imaging state of the present invention;
5a to d are front views showing various images of a baseball for measuring the circumference of the present invention;
6a to d are test images showing the baseball test screen of the present invention
Figure 7a is an inspection screen showing a state in which the circumference of the baseball of the present invention is divided and measured
Figure 7b is an enlarged view showing the main part of the inspection screen in a state of dividing and measuring the circumference of the baseball of the present invention
8 is an inspection screen for the distance measurement portion of the yarn portion when measuring the circumference of the baseball of the present invention
9 is a flowchart showing the most preferred embodiment of the present invention;

The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

In this specification, when a component is referred to as being on another component, it may be directly formed on the other component or a third component may be interposed therebetween. In addition, in the drawings, the thickness of the components is exaggerated for the effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional and/or plan views, which are ideal illustrative views of the present invention. In the drawings, thicknesses of films and regions are exaggerated for effective description of technical content. Accordingly, the shape of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. Accordingly, the embodiments of the present invention are not limited to the specific form shown, but also include changes in the form generated according to the manufacturing process. For example, the region shown at right angles may be rounded or have a predetermined curvature. Accordingly, the regions illustrated in the drawings have properties, and the shapes of the regions illustrated in the drawings are intended to illustrate a particular shape of the region of the device and not to limit the scope of the invention. In various embodiments of the present specification, terms such as first, second, etc. are used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the terms 'comprises' and/or 'comprising' do not exclude the presence or addition of one or more other components.

In describing the specific embodiments below, various specific contents have been prepared to more specifically describe the invention and help understanding. However, a reader having enough knowledge in this field to understand the present invention may recognize that it may be used without these various specific details. In some cases, it is mentioned in advance that parts that are commonly known and not largely related to the invention are not described in order to avoid confusion without any reason in describing the present invention in describing the invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a perspective view of an installation state showing a preferred embodiment of the present invention,

A bottleneck prevention cylinder module 13 that is divided into both sides inside the storage base 10 to supply a plurality of baseballs 700 that have been manufactured and to be supplied one by one to prevent the bottleneck of the baseball 700 This is installed and the baseball alignment supply device 100 to be discharged to the supply port (11);

A baseball supply conveyor module 200 for supplying the baseball 700 to the stopper module 400 by installing a "∨"-shaped supply pedestal at regular intervals on a conveyor that is installed obliquely in a belt shape;

a vision module 300 in which a vision 310 and a vision light 330 are installed obliquely in one direction of the stopper module 400 to divide the circumference of the baseball 700 into hundreds and take pictures;

a stopper module 400 provided with a stop guide 410 that is a light absorbing member for receiving and stopping each baseball 700 individually from the conveyor module 200;

By supplying the baseball 700 to the lower side of the stop guide 410, the height is adjusted through the height adjustment cylinder, and the rotation guides to measure the circumference of the baseball 700 while returning after rotating through the rotation cylinder. a module 450;

Discharge module for measuring the circumference of the baseball 700 to display the measurement value of the circumference value in the vision kit controller 140 and the circumference value measurement monitor 150 and discharge the baseball 700 to the divided delivery module 600 (500) and;

When the baseball 700 is discharged, if the circumference measurement value corresponds to the set value, it is discharged and supplied, and if it does not correspond to the set value, the moving discharge door is opened and the rejected baseball 700 is discharged to the discharge storage device below. It will consist of a divided delivery module (600) to make it possible.

All the devices and modules are installed on the base 180 and then movable, and the baseball alignment supply device 100 includes a vision controller 110, a vision kid care PLC 120, and a conveyor speed control inverter 130. will be installed

2 is a block diagram showing an embodiment of the controller of the present invention. The peripheral device module 250 includes a Mamus module M, a peripheral value measurement monitor 150 and a non-electric controller 140, respectively. The connected monitor module (RGB), the vision module 300 for measuring the circumference of the baseball 700, and the vision module 300 calculate the average value of the baseball 700 measured and send the calculated value to determine whether the pass It is made of the PLC module 120 to determine the.

3 is a front view showing the camera vision installation distance of the present invention, FIG. 4A is an installation state front view showing the camera vision shooting angle of the present invention, and FIG. 4B is an installation state plan view showing the camera vision imaging state of the present invention. .

The baseball 700 is supplied to the inside of the stop guide 410, which is a light absorbing member made of a material capable of absorbing dark background light, and then the height is adjusted, rotated 180 degrees, and then rotated again 180 degrees after being taken. It consists of a rotation module 450 for photographing, and includes a vision module 300 for photographing the baseball 700 by being inclined (inclined) by 30 to 60 degrees.

The baseball 700 is made of two leathers 710, and the boundary of the leather 710 is tied and fixed with a thread 720.

The vision module 300 allows the baseball 700 and the vision light 330 to have an interval (a) of 40 to 60 mm, and the vision light 330 to have an interval (d) of 30 to 50 mm, After installing the vision light 330 and the vision 310 to have a gap (c) of 5 to 15 mm, the vision light 330 and the camera 350 are installed to have a gap (b) of 30 to 40 mm it is preferable

Figures 5a to d relate to a front view showing various images of the baseball for measuring the circumference of the present invention, Figures 6a to d show a test image showing the baseball test screen of the present invention.

The baseball 700 supplied one by one to the rotation module 450 is sewn with two leather 710 and 108 threads 720 so that the position can be variously supplied, and it is related to the supply position of the baseball 700 It is photographed with the vision module 300 without a perimeter value as shown in the image, so that it is possible to decide whether or not to pass.

Figure 7a relates to an inspection screen showing a state in which the circumference of the baseball of the present invention is divided and measured, and Figure 7b is an enlarged view showing the main part of the inspection screen of the state of dividing and measuring the circumference of the baseball of the present invention.

The distance is measured by dividing into hundreds regardless of the supply position of the baseball 700, and in the present invention, the distance is measured by dividing the circumference into 360, and then it appears on the circumference value measurement monitor 150, each divided Measure the circumference of the baseball by measuring the distance of;

The circumference value of the baseball 700 is not measured in the vertical direction, but is measured in the inclined direction at an angle of 30 to 60 degrees so that the measurement of the circumference value can be made accurately.

Figure 8 shows the inspection screen for the distance measurement portion of the yarn portion when measuring the circumference of the baseball of the present invention,

In the process of photographing the perimeter of the baseball 700 with the vision module 300, the surface of the leather 710 is smooth and the part sewn with the thread 720 has irregularities, so conventionally it was impossible to measure the distance, but in the present invention Since the measurement is divided into 360 pieces, it is possible to accurately measure up to the distance of the yarn portion 720a in which the yarn 720 is located among the circumference of the baseball 700, and the distance of this portion is also measured to determine whether the pass or not. will be.

The present invention having this configuration applies power to the vision kit controller (140, HMI) to designate the upper and lower limits of the measured values;

If the value is set to 299-235 mm on the pop-up window of the vision kit controller 140 and then executed to check the quantity of genuine and defective products in production, the baseball supply conveyor module 200 operates first.

The baseball 700 is supplied to the storage case 10 for supplying the baseball from several to several hundred, and from the baseball alignment supply device 100 to the rotation module 450 through the baseball supply conveyor module 200. to be supplied one by one.

At this time, when the baseball 700 is not supplied from the storage base 10 and a bottleneck occurs, a sensor installed in the stopper module 400 (not shown) detects it and each composed of the bottleneck prevention cylinder module 13 Two impact spheres and a mixing sphere each or simultaneously protrude vertically through an impact cylinder and a mixing cylinder consisting of four, and by applying an impact to the baseball 700 to remove mutual friction, it provides a situation in which the baseball 700 is mixed, providing a bottleneck This is to enable continuous supply of the baseball 700 without a phenomenon.

If the supply of the baseball 700 is not detected for a certain period of time, the bottleneck phenomenon of the baseball 700 is recognized and the bottleneck prevention cylinder module 13 is operated simultaneously or independently to solve the bottleneck phenomenon When the supply of the baseball 700 is not detected by the sensor after this predetermined time, all operations are automatically stopped.

On the other hand, it is possible to perform various controls through the mouse module (M) connected to the peripheral device module 250, and the peripheral device module by shooting the baseball 700 supplied from the vision module 300 into hundreds of equal parts. When supplied to (250), the calculated value is sent to the vision kit overall control PLC (120) so that it is input, and through the program, it is possible to compare the part that meets the upper and lower limit values to determine whether or not the pass has been passed, and to the monitor module (RGB). It is to display the measured value and whether or not it passed.

When the sensor recognizes that the supply of the baseball 700 is supplied to the rotation module 450 in the baseball supply conveyor module 200, the conveyor speed control inverter 130 stops the drive to stop the rotation of the conveyor 220 Since it stops, the supply and driving of the baseball 700 are stopped (during the process of inspecting the outer diameter of the baseball), and the baseball 700 supplied from the baseball supply conveyor module 200 is rotated by the rotation module 450 . ) is stopped with one supplied to the groove part.

The rotation module 450 to which the baseball 700 is supplied is positioned so that the height adjustment cylinder is driven and raised to prevent the departure of the baseball 700 inside the stop guide 410 of the stopper module 400 and to stop. Then, the entire surface of the baseball 700 is illuminated with uniform illumination through the vision light 330 of the vision module 300 , and the baseball 700 is photographed in the vision 310 .

At this time, the baseball 700 is first photographed through the vision 310 by the setting of the vision kit controller 140, and the rotating cylinder of the rotating module 450 is driven to rotate the rotating pedestal 180 degrees to 2 Taking a picture by car, the rotating pedestal is rotated 180 degrees through a sensor located on the upper side of the rotating cylinder and then stopped.

After completing the shooting of the baseball 700 in the vision 310 and driving the height adjustment cylinder of the rotation module 450 to lower the raised baseball 700 again to return to the original position, the rotating pedestal rotated 180 degrees In the stopped state, the rotating cylinder is rotated 180 degrees again to stop at the original position.

The vision 310 of the vision module 300 is photographed by dividing the diameter into 360 equal parts when the baseball 700 is rotated by 180 degrees, and the captured values are averaged by calculating the average value of the control panel located in the vicinity of the vision controller 110 . The calculated value is sent to the PLC of

When a value is input to the PLC of the control panel, the part that meets the upper and lower limit values is compared in the program, and the circumference of the baseball 700 is determined to be OK or NG in the next operation, and accordingly, the specified sequence is executed.

The average value (X) of the peripheral values photographed by the vision module 300 is calculated through [Equation 1] below, and the calculated average value (X) determines whether or not the pass is passed through [Equation 2] below.

[Equation 1]

(r*2)*π=X

[Equation 2]

299mm <X <235mm

When the circumference value (X) of the baseball 700 is measured, the circumference value divided on the circumference value measurement monitor 150 is digitally displayed, and whether or not passed is displayed to enable confirmation.

The vision light 330 illuminates the baseball 700 so that the vision 310 can accurately photograph the baseball 700, and the baseball 700 is the surface of the baseball 700 by which the leather 710 pulls the thread 720. Since this is not constant, it is divided into 360 equal parts so that the circumference is measured.

In addition, the vision 310 and the vision lighting 330 are installed to have an inclination angle of 30 to 60 degrees, so that the thread 720 is hung at all equal angles to improve the measurement accuracy of the circumference.

In the baseball 700 of the present invention, no matter which direction is taken through the vision module 300, the part with the seal 720 appears. Therefore, if this part is not photographed, it is impossible to accurately measure the circumference, and eventually, FIG. 8 As shown in, since the film is divided into 360 equal parts, it is possible to measure up to the distance of the part where the thread 720 is, and it is possible to accurately measure and display the distance of the thread part 720a on the inspection screen, so that the It will be possible to improve the accuracy and reliability of measuring the circumference.

The baseball 700 allows the vision 310 to shoot only the baseball 700 by absorbing light into a dark background through the stop guide 410 that is a light absorbing member around it, and the baseball 700 ) and the vision light 330 to have an interval (a) of 40 to 60 mm, it is too bright to shoot at an interval of 40 mm or less, and there is a difficulty in controlling the light, and it is too dark at an interval of 60 mm or more Therefore, it is preferable to use a 170-250 Pixel camera at the same time having an interval (a) of preferably 50mm.

Since the vision light 330 has an interval d of 30 to 50 mm, it is difficult to install a light inside at an interval of 30 mm, and is less affected by the light at an interval of 50 mm or more. is to have

By making the vision light 330 and the vision 310 have a gap c of 5 to 15 mm, it is difficult to shoot under the influence of the light at an interval of 5 mm, and it is impossible to accurately take a picture at a distance of 15 mm or more. to have a gap.

By having the vision light 330 and the camera 350 have an interval (b) of 30-40 mm, it is difficult to include a lens with a 30 mm interval, and when the vision light 330 and the camera 350 have a distance of 40 mm or more, the deadline price is high. Since there is a disadvantage that is preferably to have a gap (b) of 35mm.

After the operation is confirmed in the PLC of the control panel, the baseball 700 discharges the baseball 700 from the rotation module 450 and the stopper module 400 to the divided discharge module 600 through the discharge module 500. will be.

The baseball 700 discharged to the divided discharge module 600 is discharged as it is if it passes, and if it fails, the door installed on the lower side is opened and the moving baseball 700 is dropped downward through the open discharge hole. After that, it is discharged to the NG discharge storage device, and OK and NG are distributed and discharged.

After the perimeter value of the baseball 700 is inspected, it is discharged through the discharge module 500 and at the same time, the baseball supply conveyor module 200 is driven and a new baseball 700 to check the perimeter value is rotated by the rotation module 450 . It is continuously driven through what is supplied to the perimeter value of the baseball 700 can be checked.

The present invention prevents the bottleneck of the baseball from occurring in the baseball alignment supply device, and after being supplied from the baseball supply conveyor module to the rotation module, moves vertically and rotates 180 degrees in the stopper module while the vision module is divided into 360 and shooting while It is to provide a very useful invention capable of continuously inspecting the circumference of a baseball by inspecting the circumference of the baseball to determine whether or not it has passed and then discharging it separately as pass and fail in the discharge process.

10: storage base 11: supply port
13: bottleneck prevention cylinder module 100: baseball alignment supply device
110: vision controller 120: vision kit overall control PLC
130: conveyor speed control inverter 140: vision kit controller
150: circumference value measurement monitor 200: baseball supply conveyor module
300: vision module 310: vision
330: vision light 400: stopper module
410: stop guide 450: rotation module
500: discharge module 600: split discharge module
700: baseball 710: leather
720: thread 720a: thread part
a: The distance between the baseball and the vision light b: The distance between the vision light and the camera
c : distance between vision light and vision d : distance between vision light

Claims (6)

a vision module 300 for supplying a baseball 700, rotating it 180 degrees, and illuminating the vision light 330 to take a picture with the vision 310; a perimeter measurement monitor 150 for measuring the perimeter value of the baseball 700 photographed by the vision module 300; a vision kit total control PLC 120 for calculating and sending the perimeter value of the baseball 700 photographed by the vision module 300; a division delivery module 600 for dividing and discharging the baseball 700 discharged after determining whether the entire vision kit control PLC 120 has passed; made up of;
The vision module 300 is automatic around the baseball by vision shooting, characterized in that the lens 310 of the camera 350 and the vision light 330 are installed to photograph the baseball 700 at an angle of 30 to 60 degrees. measuring device.
delete The method of claim 1,
The vision module 300 allows the baseball 700 and the vision light 330 to have an interval (a) of 40 to 60 mm, and the vision light 330 to have an interval (d) of 30 to 50 mm, After installing the vision light 330 and the vision 310 to have a gap (c) of 5 to 15 mm, the vision light 330 and the camera 350 are installed to have a gap (b) of 30 to 40 mm Automatic baseball circumference measurement device by vision shooting, characterized in that.
The method of claim 1,
The vision module 300 rotates 180 degrees by the rotation module 450 and the circumference of the baseball 700 is photographed, and the baseball circumference automatic measurement device by vision photographing, characterized in that the photograph is taken while returning 180 degrees. .
The method of claim 1,
The vision module 300 captures the thread 720 of the baseball 700 through the vision 310 and supplies the distance measurement value of the thread part 720a to the vision kit overall control PLC 120 to supply the baseball 700 ) Automatic baseball circumference measurement device by vision shooting, characterized in that for measuring the circumference.
A baseball alignment supply device 100 for supplying and storing a plurality of baseballs 700 and preventing the bottleneck phenomenon through the baseball supply bottleneck prevention cylinder module 13 and supplying the baseballs to the supply port 11;
a baseball supply conveyor module 200 for transferring the baseball 700 supplied to the supply port 11 one by one and supplying the baseball 700 to the stopper module 400;
a vision module 300 that receives the baseball 700 and raises it, rotates it 180 degrees, returns it, rotates it 180 degrees, and illuminates the vision light 330 to take a picture with the vision 310;
a perimeter measurement monitor 150 for measuring the perimeter value of the baseball 700 photographed by the vision module 300;
a vision kit total control PLC 120 for calculating and sending the perimeter value of the baseball 700 photographed by the vision module 300;
a division delivery module 600 for dividing and discharging the baseball 700 discharged after determining whether the entire vision kit control PLC 120 has passed; Automatic measuring device for baseball circumference by vision shooting, characterized in that it comprises a.

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