KR101419412B1 - Conveyor inspection device - Google Patents

Abstract

The present invention relates to a conveyor inspection apparatus for inspecting a measurement object continuously supplied by a plurality of conveyors with a light source and inspecting the light source with a vision camera, the conveyor comprising: a first conveyor for conveying a measurement object; And a second conveyor, wherein the first conveyor includes a first conveyor belt that rotates a power shaft by power and a plurality of idlers that rotate by receiving a rotational force of the first conveyor belt, A second conveyor belt rotated by the power of a driven shaft that receives the power of the driving shaft, and a plurality of idlers rotated by receiving the rotational force of the second conveyor belt, wherein the first conveyor and the second conveyor And the light source is located in the space. The conveyor inspection apparatus inspects all the front and rear surfaces of the moving product of the conveyor inspection apparatus to perform unmanned automation in the entire manufacturing process such as checking the dimensions, The product can be selected and discarded.

Description

[0001] Conveyor inspection device [0002]

The present invention relates to a conveyor inspecting apparatus, and more particularly, to a conveyor inspecting apparatus that reads all the front and back surfaces of a measuring object continuously moving along a conveyor path with a vision camera to automatically identify and discard a defective product .

Generally, a conveyor is used as a mechanical device that automatically and continuously transports materials or cargoes at a certain distance in a factory, etc. It is used for conveying parts, moving semi-finished products, transporting coal, ore and cargo in mines and harbors, And is widely used for transportation of soil and sand.

It also forms a basis for mass production in the factory by adding a special device on the conveyor, not just a simple conveying device, and by constructing a conveyor system that combines with a worker to facilitate the process.

Conveyors are classified into various types such as belt conveyor, roller conveyor, chain conveyor, screw conveyor, bucket conveyor and so on. Depending on their kind and usage, belt conveyor is generally used for transportation, · It is a device that circulates belts made of wire mesh, steel plate, etc., and carries the objects on it continuously.

Conveyors can be used not only for simple semi-finished products but also for assembling and processing lines, so that they are widely used in almost all production sites. Semi-finished products or finished products moving on conveyors can be visually inspected by the operator for defects .

However, in the inspection system using the conveyor, the conveyor transfers the products conveyed by the operation of the assembly line in a stepwise manner, and the inspected items are checked with the inspected device to determine the state of the product, that is, whether it is a good product or a defective product.

At this time, the operator stands by the side of the inspection apparatus, and when a person moving on the conveyor is identified, it is difficult to read small and precise parts, the inspection speed is slow, Lt; / RTI >

Therefore, recently, a vision inspection apparatus is used for the appearance inspection of a product.

Here, the vision inspection apparatus is a device for photographing a surface image of a measurement object with a camera and comparing the image with a steady-state image to determine whether or not the inspection object is defective.

That is, since the measurement object assembled and manufactured through the manufacturing process of the vision inspection apparatus is very expensive, the reliability of the product is also very important, so only the product determined as good is shipped through strict quality inspection, Or dispose of the whole amount.

At this time, the vision inspection apparatus is subjected to a process of acquiring an image by reflecting the surface of the measurement object in order to read out the defect (surface) defect of the measurement object, and a process of acquiring the image by transmitting the measurement object.

This allows precise reading by comparing and analyzing a visual image obtained by reflecting the surface of the measurement object on the surface and an IR (Infrared Ray) image obtained by transmitting the measurement object.

Hereinafter, a conventional conveyor inspection apparatus will be described with reference to the accompanying drawings.

1 is a view showing a conventional conveyor inspection apparatus.

Such a conventional conveyor inspection apparatus 10 is provided with a light source 40 provided on an upper part of a measurement object P moving on a conveyor belt 31 bumped by an idler 32 of a conveyor 30, (50) is positioned at the upper portion thereof to photograph the measurement object (P).

The light rays emitted from the light source 40 under the vision camera 50 are focused on the belt 31 (see FIG. 3) because the measurement object P is moved on the conveyor belt 31 to the shooting region of the vision camera 50, ), It is difficult to conduct the inspection properly or in the state where the inspection area of the measurement object is turned upside down, it is difficult to perform a proper inspection.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a conveyor inspection apparatus capable of selecting and disposing a defective product by performing unmanned automation in the entire manufacturing industry such as dimensions, .

The present invention also provides a conveyor inspecting device for automatically identifying a defective reading such as a validity period of a sealed packaged product and whether it is sealed or not, by a camera reading, not by a person, thereby increasing the accuracy of defective product selection, shortening the inspection time, The purpose is to provide.

Another object of the present invention is to provide a conveyor inspection apparatus capable of identifying a defect on both sides of a measurement object.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a conveyor inspection apparatus for irradiating a measurement object continuously supplied by a plurality of conveyors and inspecting a light source with a vision camera, the conveyor comprising: a first conveyor for conveying a measurement object; And a second conveyor, wherein the first conveyor includes a first conveyor belt that rotates a power shaft by power and a plurality of idlers that rotate by receiving a rotational force of the first conveyor belt, A second conveyor belt rotated by the power of a driven shaft that receives the power of the driving shaft, and a plurality of idlers rotated by receiving the rotational force of the second conveyor belt, wherein the first conveyor and the second conveyor And the light source is located in the space.

Further, the present invention is characterized in that each of the driving shaft and the driven shaft includes a pulley including a step, and the power of the driving shaft is transmitted to the driven shaft by engaging the chain with the pulley Lt; / RTI >

Further, in the present invention, the driving shaft is provided with the power of the motor unit to the first chain to generate a rotating force, while the first chain is shifted by the step of the driving shaft pulley, and the speed of the first conveyor belt The second chain is shifted by the step of the driven shaft pulley and the second chain is rotated by the second conveyor belt engaged with the driven shaft, A conveyor inspection apparatus characterized by being capable of shifting.

Further, the present invention provides a conveyor inspection apparatus characterized in that the first conveyor includes a recessed curved portion having a U-shaped, V-shaped or similar shape in its central portion.

The present invention also provides a conveyor inspection apparatus characterized in that the second conveyor is located on a recessed curved portion of the first conveyor.

The vision camera may be a single vision camera or a plurality of vision cameras that receive light reflected or transmitted from the light source by the light source to acquire an image, and the vision camera is located above the light source, A first vision camera that receives light reflected by the first vision camera to acquire an image; And a second vision camera located at a curved portion of the first conveyor, which is a lower portion of the light source, for receiving light transmitted through the measurement object to acquire an image.

The light source may be a single light source such as a white light source, a red light source, a green light source, a blue light source, and an infrared light source, or may be a mixed light source in which the light sources are mixed, Provides a conveyor inspection system.

As described above, according to the present invention, there is an effect that the defective products can be selected and discarded by performing unmanned automation in the entire manufacturing industry such as dimensions, assembled state, and checking foreign materials of a moving product.

In addition, the present invention automatically identifies defective readings such as the shelf life of a sealed packaging product and whether it is sealed or not, by camera readings, not by a person, thereby improving the accuracy of defective product selection, shortening inspection time and doubling production have.

In addition, the present invention is capable of identifying defects on both the front and rear sides of the measurement object, and arranging the illumination between the conveyor belts to obtain a clearer image because it is as close as possible to the measurement object.

1 is a view showing a conventional conveyor inspection apparatus.
2A is a front view schematically showing a conveyor inspection apparatus according to an embodiment of the present invention.
2B is a side view schematically showing a conveyor inspection apparatus according to an embodiment of the present invention.
2C is a front view schematically showing a circulation path of the conveyor apparatus according to the embodiment of the present invention.
3 is a front view schematically showing a conveyor inspection apparatus according to this embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. &Quot; and / or "include each and every combination of one or more of the mentioned items. ≪ RTI ID = 0.0 >

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" And can be used to easily describe a correlation between an element and other elements. Spatially relative terms should be understood in terms of the directions shown in the drawings, including the different directions of components at the time of use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element . Thus, the exemplary term "below" can include both downward and upward directions. The components can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

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

2A is a front view schematically showing a conveyor inspection apparatus according to an embodiment of the present invention.

2B is a side view schematically showing a conveyor inspection apparatus according to an embodiment of the present invention.

2C is a front view schematically showing a circulation path of the conveyor apparatus according to the embodiment of the present invention.

For reference, in the following description of the conveyor inspection apparatus 100, a conveyor belt is illustrated as the conveying means, but the present invention can be similarly applied to a conveyor apparatus to which other conveying means other than the belt is applied.

2A, a conveyor inspection apparatus 100 according to an embodiment of the present invention includes a vision camera 500 for photographing a measurement object P, a light source 400 for providing illumination for photographing, and a conveyor belt 310 And a conveyor 300 including a plurality of idlers 320.

At this time, the conveyor 300 may include a first conveyor 300a and a second conveyor 300b.

The first conveyor 300a includes a first conveyor belt 310a that rotates the driving shaft 210 with power and a plurality of idlers 320a that rotates by receiving the rotational force of the first conveyor belt 310a. .

The second conveyor 300b includes a second conveyor belt 310b that is rotated by the power of the slave shaft 220 that receives the power of the driving shaft 210 and a second conveyor belt 310b that rotates by the power of the second conveyor belt 310b And may include a plurality of idlers 320b which are transmitted and rotated.

The chain 230 may be engaged with each pulley so that the power of the driving shaft is transmitted to the driven shaft 210. [ Lt; / RTI >

In other words, the driving shaft 210 generates the rotational force by providing the power of the motor unit 200 to the first chain 230a, while the first chain 230a is rotated by the step of the pulley of the driving shaft 210 The shifting of the first conveyor belt 310a caught by the driving shaft 210 is possible.

The driven shaft 220 generates the rotational force by providing the power of the driving shaft 210 to the second chain 230b while generating the rotational force of the second chain 230b at the stepped portion of the pulley of the driven shaft 220 The shift of the second conveyor belt 310b caught by the driven shaft 220 is possible.

Particularly, by making the steps of the driving shaft 210 and the driven shaft 220 different by the second chain 230b, the speeds of the first conveyor belt 300a and the second conveyor belt 310b are different from each other This allows the measurement object P to move on the first conveyor belt 310a while moving the measurement object P more slowly on the second conveyor belt 310b on which the vision camera 500 is located, It is possible to more closely detect whether the product is a good product or a defective product.

Further, it is possible to control the speed of the first conveyor belt 310a and the second conveyor belt 310b with one power, and it is also easy to control the speed change.

Next, the shape of the conveyor 300 of the conveyor inspection apparatus 100 of the present invention will be described as follows.

2A to 2C, the shape of the first conveyor 300a is such that the conveyor belt to which the measurement object P is conveyed is not a general flat straight line shape (see FIG. 1), the center portion is U, V, And a plurality of idlers 320a may be disposed at the curved portion 311b of the conveyor belt 310a having the central portion recessed at a position where the conveying direction is changed, The first conveyor belt 310a can be supported.

If the length of the first conveyor belt 310a is long, an idler 320a may be additionally disposed on the flat product moving parts 311a and 311c as well as the curved part 311b of the belt to support the belt .

Next, the shape of the second conveyor 300b is such that the conveyor belt on which the measurement object P is conveyed satisfies the conventional general flat straight line shape, and on the recessed curved portion 311b of the first conveyor 300a, The second conveyor 300b can be located.

When the second conveyor belt 310b receives the power of the slave shaft 220 and circulates and rotates, the second conveyor belt 310b, to which the measurement object P is conveyed, A tension pulley 221 may be included between the idler 320b and the driven shaft 220 that provides power and the tension pulley 221 may be disposed between the driving shaft 210 and the driven shaft 220 There is an effect that the tension of the second chain 230b, which can be loosened by the step difference of the pulley, is appropriately maintained.

According to the shapes of the first conveyor 300a and the second conveyor 300b as described above, the path through which the measurement object P is conveyed on the conveyor 300 in the present invention is the same as that of the first conveyor belt 310a The first moving part 311a of the second conveyor belt 310b and the second moving part 311c of the first conveyor belt 310a.

Next, the first conveyor belt 310a and the second conveyor belt 310b may be spaced apart from each other.

More specifically, a first space 313a is formed between the first moving part 311a of the first conveyor belt 310a and the product moving part 312 of the second conveyor belt 310b, A second space 313b may be formed between the second moving part 311c of the conveyor belt 310a and the product moving part 312 of the second conveyor belt 310b.

A light source 400 may be positioned in the first space 313a and the second space 313b and a first light source 400a may be disposed in the first space 313a, And the second light source 400b may include the second light source 400b.

Next, a vision camera 500 may be disposed on the upper portion of the first light source 400a, the upper portion of the first light source 400b, and the product moving portion 312 of the second conveyor belt 310b. have.

Next, a principle of inspection of the conveyor inspection apparatus 300 according to an embodiment of the present invention will be described with reference to FIG. 2A.

A measurement object P continuously moving on the conveyor belt 310 in the conveyor inspection apparatus 300 is conveyed to the upper part of the first conveyor belt 310a and the second conveyor belt 310b, And the second light source 400b between the first conveyor belt 310a and the second conveyor belt 310b and the section between the light sources 400 is inspected of the measurement object P Section.

In addition, the vision camera 500 positioned on the conveyor 300 may include a plurality of vision cameras. In an embodiment of the present invention, the first light source 400a and the second light source 400b may be mounted on a measurement object P moving on the conveyor. After the second light source 400b is transmitted, the plurality of vision cameras 500 located above the conveyor 300 receive the transmitted light, and the inspected object P can be inspected for good or defective products.

The plurality of light sources 400 may be various light sources such as a white light source, a red light source, a green light source, a blue light source, an infrared light source, or a mixed light source in which the light sources are mixed, , The irradiation angle of the light source can be transmitted or reflected by the object P to be measured by irradiating the object at an angle of 180 degrees or more.

In addition, since the light source 400 is disposed between the conveyor belts 300 and approaches the measurement object P as much as possible, a clearer image can be obtained.

The plurality of vision cameras 500 may acquire images transmitted through or reflected from the measurement object P by the light source 400 to obtain images of the product, dimensions, assembly status, foreign matter identification, color, And a serial number. In this case, a single or a plurality of vision cameras 500 performing functions according to the type of the measurement object P and the inspection field can be installed and inspected.

Subsequently, the image data of the measurement object P acquired from the vision camera 500, which has reflected or passed through the light source 400, is previewed by a separate inspection device (not shown) connected to the vision camera 500 It is possible to discriminate whether the measurement object P is a good product or a defective product by comparing and analyzing the data with the input static product data.

Since the light source 400 is disposed on the same line as the moving path of the conveyor belt 310, the irradiation angle of the light source may not be completely on the upper part of the measurement object P, The test may not be accurate.

Accordingly, in this embodiment of the present invention, there is provided a conveyor inspection apparatus 100 'for simultaneously inspecting an upper portion and a lower portion of a measurement object P.

3 is a front view schematically showing a conveyor inspection apparatus according to this embodiment of the present invention.

The conveyor inspection apparatus 100 'according to the embodiment of the present invention is identical in construction to the conveyor inspection apparatus 100 according to the embodiment of the present invention, except that the arrangement of the vision camera 500 is the same as that of the light source 400, Of course, and also on the bottom.

More specifically, the vision camera is a single vision camera or a plurality of vision cameras that receive light reflected or transmitted to the measurement object P by the light source 400 to obtain an image, and the vision camera includes the light source 400 A first vision camera 500a located at an upper portion of the light source to receive light reflected by the measurement object P to acquire an image; And a second vision camera 500b for acquiring an image by receiving light.

That is, since the shape of the first conveyor 300a of the present invention includes the curved portion 311b having the central portion recessed, the second vision camera 500b can be positioned below the light source 400. [

As described above, the conveyor inspection apparatus 100 'according to the present embodiment of the present invention is capable of detecting the position of the conveyor belt 310 before and after the measurement object P even when the conveyor belt 310 is in an upside- All of the surface defect identification is possible at once.

As described above, according to the present invention, it is possible to automate unmanned automation in the entire manufacturing industry such as dimensions, assembled state, and foreign matter confirmation of a moving product in a conveyor inspection apparatus, thereby selecting and disposing of defective products.

In addition, the present invention has the effect of automatically increasing the accuracy of defective product selection, shortening the inspection time and doubling the production amount, by automatically identifying the defective reading of the measurement target by camera reading rather than by a human.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10, 100: conveyor inspection device 20, 200: motor part
210: coaxial shaft 220:
221: tension pulley 230: chain
30, 300: conveyor 311a, 311c, 312:
311b: curved portion 313:
31, 310: conveyor belt 32, 320: idler
40, 400: light source 50, 500: vision camera

Claims (7)

A conveyor inspection apparatus for irradiating a measurement object, which is continuously supplied by a plurality of conveyors, with a light source and inspecting the light source with a vision camera,
The conveyor includes a first conveyor for conveying a measurement object; And
And a second conveyor,
Wherein the first conveyor includes a first conveyor belt that rotates a driving shaft with power and a plurality of idlers that rotate by receiving a rotational force of the first conveyor belt, A second conveyor belt rotated by a coaxial power, and a plurality of idlers rotated by receiving a rotational force of the second conveyor belt,
And a space separated between the first conveyor and the second conveyor, wherein a light source is located in the space. The method according to claim 1,
Wherein each of the driving shaft and the driven shaft includes a pulley including a step, and the power of the driving shaft is transmitted to the driven shaft by engaging the chain with the pulley. 3. The method according to claim 1 or 2,
And the first chain is shifted by the step of the driving shaft pulley so that the shifting of the first conveyor belt caught by the driving shaft is enabled,
And the second chain is shifted by the step of the driven shaft pulley so that the shifting of the second conveyor belt caught by the driven shaft can be performed Features a conveyor inspection system. The method according to claim 1,
Wherein the first conveyor comprises a U-shaped or V-shaped depressed curved portion at its center. The method according to claim 1,
Wherein the second conveyor is located on a depressed curved portion of the first conveyor. The method according to claim 1,
Wherein the vision camera is a single vision camera or a plurality of vision cameras for acquiring images by receiving light reflected or transmitted by the light source,
The vision camera includes: a first vision camera which is located above the light source and receives light reflected by the measurement object to acquire an image; And
And a second vision camera positioned at a curved portion of the first conveyor, which is a lower portion of the light source, for receiving light transmitted through the measurement object to acquire an image. The method according to claim 6,
Wherein the light source is a single light source such as a white light source, a red light source, a green light source, a blue light source or an infrared light source, or a mixed light source in which the light sources are mixed, and the light source has an irradiation angle of 180 degrees or more.

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