KR20240018704A - System for double-sided scanning of objects moving on conveyor using inclined device - Google Patents

Abstract

The present invention relates to a system for inspecting both sides of an object using an inclined device while moving a conveyor. According to the present invention, in a system for double-sided inspection of an object moving on a conveyor, a first camera is located at the entrance of the conveyor and photographs the object moving through the conveyor, and the object is detected from the image captured by the first camera. A recognition unit that recognizes identification information attached to the upper surface of the conveyor, a guide unit that is located on both sides of the conveyor and includes a first guide unit and a second guide that moves the position of the unrecognized object on the conveyor, A tilting device unit that flips the unrecognized object to expose identification information attached to the lower surface of the unrecognized object, is located at an exit portion of the conveyor, and includes a second camera that photographs the overturned object, The recognition unit recognizes identification information attached to the lower surface of the unrecognized object.
According to the present invention, the risk of damage to products is reduced through the object double-sided inspection system, equipment costs can be reduced by easy installation on existing conveyors, and double-sided inspection can be performed regardless of the size and shape of the object. .

Description

Object double-sided inspection system using an inclined device during conveyor movement {SYSTEM FOR DOUBLE-SIDED SCANNING OF OBJECTS MOVING ON CONVEYOR USING INCLINED DEVICE}

The present invention relates to a system and method for inspecting both sides of an object using an inclined device while moving a conveyor. More specifically, the present invention relates to a system and method for inspecting both sides of an object using an inclined device to reduce the risk of damage to products and equipment costs and to facilitate inspection of identification information within the conveyor. It relates to an object double-sided inspection system and method.

The process of recognizing products is necessary when manufacturing, shipping, or sorting products through conveyors in manufacturing plants and logistics centers. In general, the means of recognizing products moving on a conveyor is image recognition information such as images, text, barcodes, and QR codes using a camera installed at the top of the conveyor. However, if the product is turned over or the upper side of the product with image recognition information cannot be recognized, a process of turning it over again is necessary.

However, the conventional rearrangement and double-sided inspection system for products moving on a conveyor performs double-sided inspection by using separate manpower and a robot arm or by flipping the conveyor belt, installing additional conveyor belts, and inserting additional cameras into the conveyor gap to inspect the conveyor according to the size and shape of the product. There is a problem that it is difficult to apply, the risk of damage to the product, and the cost of equipment are high.

Therefore, there is a need for technology that reduces the risk of product damage and equipment costs in object double-sided inspection systems and can be easily applied to conveyors regardless of the size and shape of the product.

The technology behind the present invention is disclosed in Korean Patent Publication No. 10-2009-0022323 (published on March 4, 2009).

The purpose of the present invention is to reduce the risk of damage to products and equipment costs by using an incline device to inspect both sides of objects moving on a conveyor, and to provide a system and method for inspecting both sides of objects that facilitate inspection of identification information within the conveyor. .

According to an embodiment of the present invention for achieving this technical problem, in an object double-sided inspection system using an incline device while moving a conveyor, a first camera is located at the entrance of the conveyor and photographs an object moving through the conveyor, the A recognition unit that recognizes identification information attached to the upper surface of the object from the image captured by the first camera, a first guide located on both sides of the conveyor and moving the position of the unrecognized object on the conveyor, and A guide unit including a second guide, a tilting device unit that flips the unrecognized object to expose identification information attached to the lower surface of the unrecognized object, is located at the exit of the conveyor, and disposes of the overturned object. It includes a second camera that takes pictures, and the recognition unit recognizes identification information attached to the lower surface of the unrecognized object.

The inclined device unit may include a three-dimensional inclined surface part so that the left and right inclinations and left and right heights are different, and a jig connected to one side of the inclined surface part to change the three-dimensional position of the inclined surface part.

The jig includes a first member whose length is adjustable in a direction (X direction) perpendicular to the moving direction (Y direction) of the conveyor, and a second member whose length is adjustable in the upper direction (Z direction) of the conveyor. can do.

A calculation unit that calculates the length of the object using a plurality of infrared sensors located on both sides of the conveyor entrance and the moving speed of the conveyor, and

At the point when the unrecognized object reaches the highest height of the inclined surface using the calculated length of the object and the moving speed of the conveyor, the length of the first member and the second member are extended to detect the unrecognized object. It may further include a control unit that controls the object to be turned over.

The identification information may include at least one of the barcode, QR code, image, and text.

The first guide and the second guide may be implemented to be able to rotate left and right, respectively.

The conveyor is divided into a first zone and a second zone based on the longitudinal center line, the first guide, the first camera, and the second camera are installed in the first zone, and the second guide and the tilting device unit are It can be installed in the second zone.

The control unit closes the first guide and opens the second guide when the identification information is not recognized by the first camera when the object enters through the first zone, so that the object is detected by the first guide. The object can be moved to the second zone.

The control unit may maintain the position of the object by closing the second guide and opening the first guide when the identification information is recognized by the first camera when the object enters through the first zone. there is.

The tilt device unit may operate so that the unrecognized object is seated in the first zone.

The material of the inclined surface portion may include rubber or soft plastic.

As such, according to the present invention, when inspecting both sides of an object using an incline device during conveyor movement, the risk of damage to the product can be reduced, installation costs can be reduced by easy installation on an existing conveyor, and the size and size of the object can be reduced. Double-sided inspection can be performed regardless of shape.

Figure 1 is a configuration diagram of an object double-sided inspection system using an inclined device while moving a conveyor according to an embodiment of the present invention.
FIGS. 2A and 2B are diagrams for explaining identification information of an object subject to inspection.
Figures 3a and 3b are diagrams for explaining a double-sided object inspection system using an inclined device while moving a conveyor according to an embodiment of the present invention.
FIGS. 4A and 4B are diagrams for explaining a process in which an object passes between first and second infrared sensors according to an embodiment of the present invention.
Figure 5 is a diagram for explaining the tilt device unit according to Figures 3a and 3b.
FIGS. 6A and 6B are diagrams for explaining the configuration and operation of the jig according to FIG. 5.
Figures 7a to 7d are diagrams for explaining a process in which an object is flipped while passing through an inclining device unit according to an embodiment of the present invention.
Figure 8 is a flowchart of an object double-sided inspection system using an inclined device while moving a conveyor according to an embodiment of the present invention.

Then, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case where it is "directly connected," but also the case where it is "electrically connected" with another element in between. . Additionally, when a part is said to “include” a certain component, this means that it does not exclude other components but may additionally include other components, unless specifically stated to the contrary.

Then, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention.

Hereinafter, we will look at the object double-sided inspection system using an inclined device while the conveyor is moving through FIGS. 1 to 7D.

FIG. 1 is a configuration diagram of an object double-sided inspection system according to an embodiment of the present invention, and FIGS. 2A and 2B are exemplary diagrams for explaining identification information attached to an object.

In addition, Figure 3a is a diagram showing a state before the object to be inspected enters the entry section, and Figure 3b is a view showing the state after the object to be inspected passes through the entry section.

As shown in FIG. 1, the object double-sided inspection system 100 includes a recognition unit 110, a guide unit 120, a calculation unit 130, an inclination device unit 140, and a control unit 150.

First, the recognition unit 110 recognizes identification information attached to the object using the first camera 111 installed at the entry part of the conveyor and the second camera 112 installed at the exit part of the conveyor.

As shown in FIGS. 2A and 2B, identification information for recognizing the product name or product information is attached to the front or back of the object.

Here, the identification information includes at least one of a barcode, QR code, image, and text attached to the object.

Accordingly, the recognition unit 110 determines the object to be a recognized object or an unrecognized object depending on the presence or absence of identification information on the object.

As shown in FIGS. 3A and 3B, the guide unit 120 includes a first guide 121 and a second guide 122 installed at both ends of the conveyor, and the first guide 121 and the second guide 122 are designed to allow left and right rotation, respectively.

The object double-sided inspection system 100 according to an embodiment of the present invention determines the opening and closing operations of the first guide 121 and the second guide 122 depending on whether the object is recognized.

When the object 50 passes through the first guide 121 and the second guide 122, the calculation unit 130 calculates the Calculate the length.

At this time, the first infrared sensor 131 and the second infrared sensor 132 can measure the first infrared contact time and the last infrared contact time of the object 50.

The inclined device unit 140 includes an inclined surface unit 141 and a jig 142. The inclined surface portion 141 is three-dimensionally implemented so that the left and right inclinations and left and right heights are different, and is connected to the jig 142. Additionally, the material of the inclined surface portion 141 includes rubber or soft plastic with low friction.

The control unit 150 uses the length of the object calculated by the calculation unit 130 and the moving speed of the conveyor to set the jig 142 at the point when the object 50 reaches the maximum height of the inclined surface unit 141. The length is extended to control the object 50 to be turned over.

Hereinafter, the object double-sided system according to an embodiment of the present invention will be described in more detail using FIGS. 3A to 7D.

As shown in FIGS. 3A and 3B, the conveyor can be divided into a first zone 10 and a second zone 20 based on the longitudinal center line, and the first zone 10 has a first guide 121. ), a first infrared sensor 131, a first camera 111, and a second camera 112 may be installed, and a second guide 122 and a second infrared sensor 132 are installed in the second zone 20. , the inclined surface portion 141 and the jig 142 may be installed.

As shown in FIG. 3A, the object 50 is moved on a conveyor for shipping or sorting.

According to an embodiment of the present invention, for convenience of explanation, it is assumed that the object 50 enters the entry section through the first zone 10.

When the object 50 enters the first zone 10 of the conveyor, the first camera 111 located above the entry part of the conveyor detects the object moving on the conveyor in order to recognize the identification information attached to the object 50. Take (50).

Then, the recognition unit 110 recognizes the identification information attached to the object 50 from the video and images captured by the first camera 111. And the object 50 passes between the first guide 121 and the second guide 122 installed on both sides of the conveyor.

At this time, the object whose identification information is recognized by the first camera 111 and does not need to be flipped moves to the exit area while remaining in the first area 10. On the other hand, an object that needs to be flipped because its identification information is not recognized by the first camera 111 is moved to the second area 20 by the first guide 121 and the second guide 122 and placed in the tilt device 140. While passing through, it is overturned and at the same time settles into the first section (10). The presence or absence of identification information is determined by the second camera 112 located at the top of the advance section.

FIGS. 4A and 4B are diagrams for explaining a process in which an object passes between first and second infrared sensors according to an embodiment of the present invention.

In particular, FIG. 4A is a diagram for explaining the measurement of the first contact time between an object and infrared rays, and FIG. 4B is a diagram for explaining the measurement of the last contact time for an object and infrared rays.

As shown in FIGS. 4A and 4B, the first infrared sensor 131 and the second infrared sensor 132 installed on the first guide 121 and the second guide 122, respectively, transmit and receive infrared rays in real time, The first and last infrared contact times of the object 50 passing between the first guide 121 and the second guide 122 are measured.

That is, the first infrared sensor 131 and the second infrared sensor 132 make initial contact corresponding to the point in time when the object 50 begins to enter between the first infrared sensor 131 and the second infrared sensor 132. The last contact time corresponding to the time and passing point between the first infrared sensor 131 and the second infrared sensor 132 is measured.

As shown in FIGS. 4A and 4B, the calculation unit 130 calculates the length of the object using the time the object 50 passes between the first guide 121 and the second guide 122 and the moving speed of the conveyor. Calculate

As shown in Figure 3b, depending on whether or not the identification information is recognized, the object 50 is moved to the first zone 10 or the second zone through the first guide 121 and the second guide 122 installed at both ends of the conveyor. Move to area (20).

When the recognition unit 110 recognizes the identification information of the object imaged by the first camera 111, the object double-sided inspection system 100 detects the object 50 through the first guide 121 and the second guide 122. When passing through the space, the first guide 121 is opened and the second guide 122 is closed.

That is, when the identification information of the object 50 is recognized, the recognition unit 110 moves the object while remaining positioned on the first area 10.

On the other hand, if the recognition unit 110 does not recognize the identification information of the object captured by the first camera 111, when the object 50 passes between the first guide 121 and the second guide 122 , the first guide 121 is closed and the second guide 122 is opened.

That is, if the object 50 enters the conveyor in an overturned state and fails to recognize the identification information, the first guide 121 and the second guide ( The object 50 is moved to the second area 20 through the operation of 122).

Figure 5 is a diagram for explaining the tilting device unit according to Figures 3a and 3b.

As shown in FIGS. 3A, 3B, and 5, the inclined device unit 140 includes an inclined surface unit 141 and a jig 142, and the inclined surface unit 141 is three-dimensionally implemented so that the left and right inclinations and left and right heights are different. do. Additionally, the jig 142 is connected to the inclined surface portion 141 to control the height of the inclined surface portion 141 in the Z-axis direction and the movement in the X-axis direction.

FIGS. 6A and 6B are diagrams for explaining the configuration and operation of the jig according to FIG. 5.

As shown in FIGS. 6A and 6B, the jig 142 includes a first member 143 and a FIG. 2 member 144.

The first member 143 can adjust its length in the

Accordingly, the jig 142 protrudes the first member 143 and the second member 144 through FIGS. 6A and 6B through an inherent electric actuator or striking device to form the first member 143 and the second member 144. The length of the second member 144 can be extended. Additionally, the jig 142 can return the first member 143 and the second member 144 to their pre-protrusion state through an inherent rubber band or spring.

Figures 7a to 7d are diagrams for explaining a process in which an object is flipped while passing through an inclining device unit according to an embodiment of the present invention.

Figure 7A is a diagram for explaining an object entering the tilt device, Figure 7B is a diagram for explaining the process of an object rising in height through the tilt device, and Figure 7C is a diagram showing the object reaching the maximum height of the tilt device. When doing so, it is a diagram to explain turning an object over by adjusting the lengths of the first and second members of the jig, and Figure 7d is a diagram to explain placing the object on the bottom of the conveyor after it is turned over.

As shown in FIGS. 7A to 7D, when the object 50 reaches the highest slope height of the inclined surface portion 141, the control unit 150 moves the jig 142 in the X direction perpendicular to the moving direction (Y direction) of the conveyor. It is possible to effectively turn objects over through length control in the Z direction, which is the upper direction of the conveyor.

At this time, the control unit 150 uses the length information of the object 50 obtained through the calculation unit 130 and the moving speed of the conveyor to predict in advance the time when the object 50 reaches the maximum height of the inclined surface unit 141. You can. Accordingly, the control unit 150 instantaneously extends the lengths of the first member 143 and the second member 144 according to the predicted time point, causing the object 50 to turn over in the air. An object whose upper and lower surfaces are turned over by the tilt device 140 lands in an area opposite to the area where the tilt device 140 is installed.

That is, in the embodiment of the present invention, the object 50 enters the tilting device 140 through the second zone 20, so it is turned over by the tilting device 140 and enters the first zone 10. It settles down.

The second camera 112 located above the exit portion of the conveyor photographs the lower surface of the object 50 placed in the first area 10 in order to recognize identification information attached to the object 50.

Hereinafter, the operation of the object double-sided inspection system according to an embodiment of the present invention will be described step by step with reference to FIG. 8.

Figure 8 is a flowchart of an object double-sided inspection system using an inclined device while moving a conveyor according to an embodiment of the present invention.

As shown in FIG. 8, the object 50 is placed on the conveyor and moves. The first camera photographs the upper surface of the object moving on the conveyor.

The recognition unit 110 uses the captured image to distinguish between unrecognized objects that require flipping without identification information and recognized objects that do not require flipping with identification information, based on the presence or absence of identification information.

Through control of the guide unit 120, recognized objects that do not need to be flipped are kept in the first zone (10), and unrecognized objects that need to be flipped are moved to the second zone (20).

The infrared sensor 131 installed on the first guide 121 and the second guide 122 calculates the length of the object 50 passing through the guide unit 120. Recognized objects that do not require flipping are moved to the exit section, and unrecognized objects moved to the second zone 20 pass through the tilting device 140.

Here, the length of the object is used to determine that the unrecognized object reaches the highest height of the inclined surface portion 141, and when the object 50 reaches the highest height, the jig 142 is connected to the first member 143 and the second member 142. 2 The object 50 can be turned over by protruding the member 144.

The object 50 is turned over while passing through the tilting device 140 and is seated in the first section of the conveyor. And the object 50 recognizes identification information through the second camera 112 located at the exit portion.

The second camera 112 photographs the object 50 placed in the first zone. And the recognition unit 110 recognizes the identification information attached to the object 50 from the video and images captured through the second camera 112.

However, in the case of an object recognized by the first camera 111 in the entry stage, identification information recognition has been completed, so when it passes the exit part, the recognition unit 110 blocks the operation of the second camera 112. Alternatively, the recognition operation may not be performed.

According to an embodiment of the present invention, the present invention reduces the risk of damage to the product when inspecting both sides of an object using an incline device while moving the conveyor, and can reduce equipment costs by easily installing on an existing conveyor. Double-sided inspection can be performed regardless of the size and shape.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims.

10: First section of conveyor 20: Second section of conveyor
50: Object 100: Object double-sided inspection system
110: recognition unit 111: first camera
112: second camera 120: guide unit
121: first guide 122: second guide
130: Calculation unit 131: Infrared sensor
140: inclined device part 141: inclined surface part
142: Jig 143: First member
144: second member 150: control unit

Claims (11)

In a system for inspecting both sides of an object moving on a conveyor,
A first camera located at the entrance of the conveyor and photographing objects moving through the conveyor;
a recognition unit that recognizes identification information attached to the upper surface of an object from an image captured by the first camera;
A guide unit located on both sides of the conveyor and including a first guide and a second guide that moves the position of the unrecognized object on the conveyor;
a tilting device unit that turns the unrecognized object over so that identification information attached to the lower surface of the unrecognized object is exposed;
It is located at the exit part of the conveyor and includes a second camera that photographs the overturned object,
The recognition unit,
A double-sided object inspection system that recognizes identification information attached to the lower surface of the unrecognized object. According to paragraph 1,
The tilting device part,
A three-dimensional slope part with different left and right slopes and different heights, and
A double-sided object inspection system including a jig connected to one side of the inclined surface portion to change the three-dimensional position of the inclined surface portion. According to paragraph 2,
The jig,
A first member whose length can be adjusted in a direction perpendicular to the moving direction (Y direction) of the conveyor (X direction), and
A double-sided object inspection system including a second member whose length is adjustable in the upper direction (Z direction) of the conveyor. According to paragraph 3,
A calculation unit that calculates the length of the object using a plurality of infrared sensors located on both sides of the conveyor entrance and the moving speed of the conveyor, and
At the point when the unrecognized object reaches the highest height of the inclined surface using the calculated length of the object and the moving speed of the conveyor, the length of the first member and the second member are extended to detect the unrecognized object. A double-sided object inspection system further comprising a control unit that controls the object to be turned over. According to paragraph 1,
The identification information is,
A double-sided object inspection system including at least one of the barcode, QR code, image, and text. According to paragraph 1,
A double-sided object inspection system in which the first guide and the second guide are implemented to be able to rotate left and right, respectively. According to paragraph 1,
The conveyor is divided into a first zone and a second zone based on the longitudinal center line,
The first guide, first camera and second camera are installed in the first zone,
An object double-sided inspection system in which the second guide and the tilting device are installed in a second zone. In clause 7,
The control unit,
If the identification information is not recognized by the first camera when the object enters through the first zone,
An object double-sided inspection system that causes the first guide to close and the second guide to open, thereby moving the object to a second zone by the first guide. In clause 7,
The control unit,
When the identification information is recognized by the first camera when the object enters the first zone,
An object double-sided inspection system that maintains the position of the object by allowing the second guide to close and the first guide to open. In clause 7,
The tilting device part,
An object double-sided inspection system that operates to ensure that the unrecognized object is placed in the first zone. According to paragraph 2,
A double-sided object inspection system wherein the inclined surface portion is made of rubber or soft plastic.