WO2019117352A1

WO2019117352A1 - Lighting device for surface inspection

Info

Publication number: WO2019117352A1
Application number: PCT/KR2017/014688
Authority: WO
Inventors: 조영선
Original assignee: (주)엘파인
Priority date: 2017-12-14
Filing date: 2017-12-14
Publication date: 2019-06-20

Abstract

A lighting device for surface inspection is provided. The lighting device for surface inspection comprises: a main body unit having an inner space formed therein; light emitting units arranged at a plurality of positions along a curvilinear path set in the main body unit and emitting inspection light; and a power supply unit installed in the main body unit and directly contacting one end of the light emitting units to supply power required to emit the inspection light.

Description

Lighting equipment for surface inspection

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface inspection illumination device, and more particularly, to a surface inspection illumination device capable of smoothly supplying power to the LED modules and efficiently cooling the LED modules.

Generally, in the production process of all products, a defect inspection process is performed to evaluate the completion of the finished product after the manufacturing process.

At this time, defects are all elements that hinder the characteristics of the product. They may be very small and defects of various sizes may be present from the invisible to the naked eye.

Inspection of external defects of a relatively large object is usually carried out by extracting a sample at random and inspecting the product with the naked eye by an operator. In the case of a small object, an operator may also inspect the defect using a microscope or the like.

However, in this case, it is impossible to inspect all the products produced and it is a subjective inspection according to the operator's visual observation, which makes it difficult to perform objective product inspection.

As a method for solving such a problem, an inspection system that automates the inspection process is used. The image of a product acquired through a CCD (charge-coupled device) camera is read by a standard It compares and analyzes with images and makes scientific decision-making, thereby achieving objective overall inspection and automation of quality control.

Such automated inspection equipment can be roughly classified into an optical system, an image analysis system, and a machine control system.

The optical system illuminates the area to be measured and obtains the reflected image and transmits it to the image analyzer. In the image analyzer, the analog signal of the transmitted image is converted into a digital signal, and compared with the standard image inputted, , Classifies defects by grade and outputs the results.

The machine control system directly classifies defective products by type and grade according to the results of image analysis.

BACKGROUND ART [0002] Lighting devices used for obtaining an image of an object to be inspected in an automatic defect inspection apparatus of the related art include a backlight device, an upper lighting device, and a side lighting device.

However, the conventional lighting apparatus has substrates on which the LEDs are mounted, and when power is supplied to each of the substrates, the power supply must be connected to a separate power supply through a line.

As a result, there is a problem in that the size of the main body of the apparatus is increased and disconnection occurs during long-term use.

Further, when an optical rod for condensing the light emitted from the LEDs is used, the position of the optical rod can not be variably controlled.

Further, when heat generated during the light emission of a plurality of LEDs remains in the interior of the main body, there arises a problem of deteriorating the device constitution.

A prior art related to the present invention is Korean Patent Laid-Open Publication No. 10-2016-0010226 (published on 2016.01.27), which discloses a surface inspection optical apparatus and a surface inspection method.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a surface inspection illumination device capable of smoothly supplying power to LED substrates and efficiently cooling LED modules.

In a preferred embodiment, the present invention provides a lighting device for surface inspection.

The illuminating device for surface inspection includes a main body having an inner space formed therein; A light output unit arranged at a plurality of positions along the curvilinear path set in the main body and emitting inspection light; And a power supply unit which is installed in the main body and directly supplies power to the one end of the light output unit to supply the power required to emit the inspection light.

Preferably, the light output unit includes a plurality of substrates on which LEDs emitting the inspection light are mounted, and power supply terminals formed on one end of each of the plurality of substrates, for applying power to the LEDs.

The power supply terminals are preferably in direct contact with the power supply.

Preferably, the power supply unit includes power supply terminals formed on one side of the main body and installed along the curvature path, and a power supply for supplying power to the power supply terminals.

The power supply terminals are disposed on the sides of each of the plurality of substrates, and are preferably in one-to-one correspondence with the power supply terminals.

The light output unit preferably includes a plurality of optical rods disposed on the plurality of substrates and collecting the inspection light to be emitted.

Preferably, both ends of the plurality of optical rods are fixed by being fitted in a plurality of fixing holes formed in both side portions of the main body portion, and in each of both side portions of the main body portion, the plurality of fixing holes are arranged along the curvature path Do.

The plurality of optical rods are preferably disposed on the main body so as to be vertically movable.

The main body may include a cooling unit.

The cooling unit may include an inlet end passing through the one side of the main body, an outlet end passing through the other side of the main body, and air cooled to a temperature set by the inlet end so that the air supplied through the outlet end is discharged And a cooling module for circulating the air through the internal space of the main body.

It is preferable that the inlet end and the outlet end are formed in a plurality of holes and are formed as inclined holes facing the light output portion.

It is preferable that the cooling unit includes a heat dissipating member provided in an inner space of the main body.

The heat dissipation member is preferably disposed below the plurality of substrates.

It is preferable that the upper end of the heat dissipating member forms a profile forming the radius of curvature in which the plurality of substrates are disposed.

The upper end of the heat dissipating member is preferably formed to be in physical contact with the bottom surface of the plurality of substrates.

The upper end of the heat dissipating member may be formed with a seating groove in which the bottom surfaces of the plurality of substrates are inserted and seated.

It is preferable that the heat dissipation member is formed by cutting a heat dissipation hole for exposing the bottom surface of the plurality of substrates to the outside.

It is preferable that the heat dissipating hole is formed such that the size of the hole gradually increases from the upper end of the heat dissipating member along the lower end thereof.

Preferably, the upper rim of the heat dissipating hole is formed with a seating groove in which the rims of the plurality of substrates are seated.

The present invention has an effect that power supply to the substrates can be smoothly performed by directly contacting and connecting the LED substrates and the power supply terminal.

In addition, the present invention has an effect of efficiently condensing light by variably controlling the distance between the LEDs mounted on each substrate and the optical rod.

In addition, the present invention has the effect that the substrates on which the LEDs are mounted are heat-dissipated by using air and further heat-dissipated by using a separate heat-radiating member.

1 is a perspective view showing a lighting apparatus for surface inspection according to the present invention.

2 is a view showing a configuration of a lighting apparatus for surface inspection according to the present invention.

3 is a perspective view showing a configuration of one substrate having LEDs in a light emitting portion according to the present invention.

4A is a view showing an arrangement state of a light output portion on the front side showing the main body of the present invention.

4B is a view showing an arrangement state of the light output portion on the side surface showing the main body of the present invention.

5 is a view showing one side of the main body according to the present invention and showing an example in which a position controller for controlling the position of the optical rod is installed

6 is a view showing a lighting apparatus for surface inspection having a cooling section according to the present invention.

7 is a view showing an example in which an inlet end is formed in an inclined state.

8 is a view showing a state in which a heat dissipating member is disposed in an internal space of a main body according to the present invention.

9 is a view showing a state in which the heat radiating member and the boards according to the present invention are closely disposed.

10 is a view showing that a seating groove is formed in a heat dissipating member according to the present invention.

11 is a view showing a state in which the substrate according to the present invention is seated in the seating groove.

12 is a view showing that heat dissipating holes are formed in the heat dissipating member according to the present invention.

FIG. 13 is a view showing a state where a seating groove according to the present invention is connected to a heat dissipating hole.

[Description of Symbols]

100:

200:

300; Power supply

400: cooling section

Hereinafter, a lighting apparatus for surface inspection according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a lighting apparatus for surface inspection according to the present invention, and FIG. 2 is a view showing a configuration of a lighting apparatus for surface inspection according to the present invention.

Referring to FIGS. 1 and 2, the illumination device for surface inspection according to the present invention comprises a main body 100, a light output part 200, and a power supply part 300.

Each configuration will be described.

In the main body 100,

The main body 100 according to the present invention may be formed of aluminum to achieve heat radiation efficiency.

The main body 100 has an inner space and an opening. The opening is a hole for guiding the inspection light formed through the light output portion 200 to be emitted.

In the light output unit 200,

Referring to FIG. 2, the light output unit 200 includes a plurality of substrates 210 and a power application terminal 220.

Each of the plurality of substrates 210 is installed in the inner space 101 of the main body 100 along the curvature path a set in the inner space 101 of the main body 100.

That is, the plurality of substrates 210 are spaced apart from each other and are arranged to form a curvature path (a) along the substrate 210 disposed at the center from the outermost substrates 210.

Referring to FIG. 3, each of the above-mentioned substrates 210 is formed into a length of a plate, and a plurality of LEDs 211 are mounted on the upper surface thereof.

The plurality of LEDs 211 are disposed toward the opening of the main body 100 described above.

Power supply terminals 220 are respectively installed at one end of each of the substrates 210 configured as described above.

Each of the power supply terminals 220 is electrically connected to each of the LEDs 211 mounted by a circuit pattern formed in the substrate 210 so as to supply power.

Each of the power supply terminals 220 formed at one end of each of the substrates 210 physically contacts each of the power supply terminals 310 (see FIG. 2) formed on the side of the main body 100, . Its configuration will be described later.

In addition, optical bars 230 are disposed on each of the substrates 210, respectively.

Each of the optical bars 230 is spaced apart from the LEDs 211 mounted on each of the substrates 210 at regular intervals.

Both ends of each of the optical rods 230 may be fixed to both sides of the main body 100.

FIG. 4A is a view showing an arrangement state of the light output part on the front side showing the main body of the present invention, and FIG. 4B is a view showing the arrangement state of the light output part on the side side showing the main part of the present invention.

4A and 4B, a plurality of power supply terminals 310 are formed on one side of the main body 100 according to the present invention.

The power supply terminals 310 are formed on one side of the main body 100 along the curvature path a in which the above-described substrates 210 are disposed.

The power supply terminals 310 are directly bonded and connected to the power supply terminals 220 of the respective substrates 210 disposed along the curvature path a.

Of course, the power supply terminals 310 described above may be structured such that the power supply terminals 220 can be inserted and contacted.

The manner of fitting may be constituted by side fitting or fitting from above.

The power supply terminals 310 may be electrically connected to the power supply 320 to receive power.

The power supplied to the power supply terminals 310 is transmitted to the power supply terminal 220 of the substrate 210 and the power is supplied to each of the LEDs 211 ). &Lt; / RTI >

Accordingly, the LEDs 211 of each of the substrates 210 can emit the inspection light to the outside, that is, the inspection object through the opening of the main body 100.

The inspection rods 230 for collecting the inspection light positioned on each of the substrates 210 and collecting the inspection light are each provided with a plurality of fixing holes 110 formed at both sides of the main body 100 As shown in Fig.

Here, the plurality of fixing holes 110 are formed so as to be spaced apart from the curvilinear path (a) described above to have a curvature consistent with the curvilinear path (a).

The curvature path a in which the substrates 210 are installed as a whole and the curvature path a in which the optical bars 230 are fixed form the same curvature as each other, 230 may be uniformly formed.

On the other hand, the optical bars 230 according to the present invention may be arranged to be flowable from the top of the substrate 210.

5, the position control unit 600 according to the present invention may include a connecting member 610 and a cylinder 620 having a stretchable shaft 621.

The connecting member 610 may be formed of a member having a length, and may be bent to have a curvature forming the curvature path (a).

The connecting member 610 is disposed on one side of the main body 100 and fixes both ends of each of the optical bars 230.

Here, the plurality of fixing holes 111 may be formed as long holes having a predetermined length along the vertical direction so as to form a path for raising and lowering the connecting member 610.

Meanwhile, the connecting member 610 is connected to the shaft 621.

The cylinder 620 having the shaft 621 is fixed to both side portions of the main body 100.

The cylinder 620 may be fixed to one side of the main body 100 so as to be positioned above or below the connecting member 610.

Referring to FIG. 6, the cooling unit 400 is installed in the inner space 101 of the main body 100 according to the present invention.

The cooling unit 400 includes an inlet end 410, an outlet end 420, and a cooling module 430.

The inlet end 410 is formed in a large number and is formed on one side of the main body 100.

In addition, the outlet end 420 is formed in a large number and is formed on the other side of the main body 100.

The inlet end 410 and the outlet end 420 may be formed at positions facing each other at one side and both sides of the main body 100.

The cooling module 430 supplies the air cooled to a temperature set at the inlet end 410 and allows the air supplied through the outlet end 420 to be discharged to the inside space 101 ).

The cooling module 430 includes an air supply pipe 431 connected to the inlet end 410, an air discharge pipe 432 connected to the outlet end 420, and a fan for supplying air to the air supply pipe 431. [ And a cooler 434 installed in the air supply pipe 431 for cooling the air supplied from the fan 433. [

A plurality of inlet ends 410 and outlet ends 420 are formed to be exposed in the upper space of the substrates 210 in a plurality.

In addition, the plurality of inlet ends 410 and the outlet ends 420 may be further formed so as to be exposed to the space below the substrates 210.

Thus, the air to be cooled can be supplied to the upper space and the lower space of the substrate 210 to cool these spaces.

7, the entrance ends 411 and the exit end may be formed to be inclined toward the upper and lower ends of the substrates 210, and may be formed as holes.

Thus, the cooled air can be supplied directly to the steel surfaces and the lower surface of the substrates.

Referring to FIG. 8, a heat dissipating member 700 made of aluminum is disposed in the inner space 101 of the main body 100 according to the present invention to serve as a radiating fin.

The heat dissipating member 700 may be disposed below the substrates 210.

The upper end of the heat dissipating member 700 according to the present invention is installed to be spaced apart from the lower portion of the substrates 210.

In this case, the inlet end 410 and the outlet end 420 described above are formed to be exposed in a space between the bottom surface of the substrates 210 and the top surface of the heat dissipating member 700.

9, the top surface of the heat dissipating member 700 according to the present invention is formed to have a profile along the curvilinear path (a) of the substrates 210. [

That is, the top surface of the heat dissipating member 700 is formed as a curved surface.

Accordingly, the bottom surface of the substrates 210 can be installed in a state of being in close contact with the top surface of the heat dissipating member 700, which is formed as a curved surface, and the heat generated from the substrates 210 itself can be efficiently .

FIG. 10 is a view showing a seating groove formed in a heat dissipating member according to the present invention, and FIG. 11 is a view showing a state in which a substrate according to the present invention is seated in a seating groove.

10 and 11, a plurality of seating grooves 710 are formed on the upper surface of the heat dissipating member 700 according to the present invention, in which the lower ends of the substrates 210 are fitted.

Therefore, the lower end of each of the substrates 210 can be fitted into and adhered to each of the corresponding seating grooves 710.

The lower end of each of the substrates 210 may be disposed to surround each of the seating grooves 710 to more efficiently dissipate the heat generated in each of the substrates 210 and to secure the seating grooves 710 So that it is possible to solve the problem of deviating from the set position by the external impact.

Therefore, when the inspection light is emitted, it is possible to prevent errors in the inspection by preventing the deviation of the light output direction.

FIG. 12 is a view showing that heat dissipating holes are formed in a heat dissipating member according to the present invention, and FIG. 13 is a view showing a state where a mounting recess according to the present invention is connected to a heat dissipating hole.

Referring to FIG. 12, a plurality of heat dissipating holes 720 are formed through the heat dissipating member 700 'according to the present invention.

Each of the heat dissipation holes 720 is formed to be exposed on the bottom surface of each of the substrates 210.

Therefore, the bottom surface of each of the substrates 210 can be exposed to the outside through the lower end of the heat dissipating member 700 'through the corresponding heat dissipating holes 720.

That is, each of the heat dissipating holes 720 forms a heat dissipating path, and is a path for guiding the heat dissipation smoothly.

Here, as shown in FIG. 13, the respective seating grooves 710 are connected to the respective heat dissipating holes 720.

In addition, although not shown in the drawing, each of the heat dissipation holes according to the present invention may be formed such that the inner diameter of the hole gradually increases along the lower end from the upper end thereof.

Accordingly, since the heat formed in each of the substrates 210 is formed along the heat dissipation holes formed in the heat dissipation member, and the size of the holes is gradually widened along the lower end thereof, there is an advantage that the heat dissipation can be performed more efficiently have.

FIG. 14 is a view showing another example of the heat radiation member according to the present invention, and FIG. 15 is a view showing another example of the heat radiation member according to the present invention.

Referring to FIG. 14, an installation space 100a is formed in the main body 100 according to the present invention.

A curvature is formed on the top of the main body 100 so that the substrates 210 are disposed. The main body 100 itself is made of aluminum.

The installation space 100a is formed as a pair so as to be symmetrical with respect to the center of the main body 100.

In the installation space 100, a radiation member 750 is fixedly installed.

The upper end of the heat radiation member 750 is fixed to the upper surface of the installation space 100a and a plurality of heat radiation fins 751 are formed along the lower side.

The plurality of radiating fins 751 may be exposed to the installation space 100a to achieve heat dissipation.

Although not shown in the drawings, the upper surface of the heat dissipating member 750 and the upper surface of the installation space 100a may be concavo-convexed to increase the heat transfer efficiency, thereby increasing the contact area.

Fig. 15 is a view showing another example of the heat radiation member according to the present invention. Fig.

Referring to FIG. 15, a pair of heat dissipating holes 770 may be formed in the main body 100 according to the present invention with the center of the main body 100 as a boundary.

A plurality of heat dissipating protrusions 771 or ribs having a predetermined shape are protruded from the inner wall of the pair of heat dissipating holes 770 along the inner side.

The heat dissipating member according to the present invention may include a heat dissipating hole 770 formed in the main body 100 itself and a heat dissipating protrusion 771 or heat dissipating ribs formed in the heat dissipating hole 770, have.

That is, in the present invention, the main body itself formed of a material such as aluminum and the heat dissipating space, the heat dissipating protrusion and the heat dissipating rib can be used as the heat dissipating member, and the additional cost for installing the separate heat dissipating member in the main body There is an advantage that can be saved.

According to the above-described configuration and operation, the embodiment according to the present invention has an advantage that power supply to the substrates can be smoothly performed by directly supplying and supplying the LED substrates and the power supply terminal directly.

In addition, the embodiment of the present invention has an advantage that efficient light collection can be achieved by variably controlling the interval between the LEDs mounted on each substrate and the optical bar.

In addition, the embodiment of the present invention has an advantage that the boards on which the LEDs are mounted can radiate heat by using air, and can further radiate heat by using a separate heat-radiating member.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

Claims

A main body portion having an inner space formed therein;

A light output unit arranged at a plurality of positions along the curvilinear path set in the main body and emitting inspection light; And

And a power supply unit installed in the main body to supply power required to emit the inspection light in direct contact with one end of the light output unit.
The method according to claim 1,

The light-

A plurality of substrates on which LEDs emitting the inspection light are mounted,

And power supply terminals formed on one end of each of the plurality of substrates for applying power to the LEDs,

The power-

Wherein the power supply unit is directly connected to the power supply unit.
3. The method of claim 2,

The power supply unit,

Power supply terminals formed on one side of the main body and installed along the curvilinear path,

And a power supply for supplying power to the power supply terminals,

The power supply terminals,

Wherein the power supply terminals are disposed on the side of each of the plurality of substrates, and are in one-to-one correspondence with the power supply terminals.
3. The method of claim 2,

The light-

A plurality of optical rods disposed on the plurality of substrates and collecting the inspection light to be emitted,

Wherein both ends of the plurality of optical rods are connected,

A plurality of fixing holes formed on both sides of the main body,

And the plurality of fixing holes are arranged along the curvature path in each of both side portions of the main body portion.
5. The method of claim 4,

The plurality of optical rods,

And is disposed in the main body portion so as to be vertically movable.
3. The method of claim 2,

The main body includes a cooling part,

The cooling unit includes:

An inlet end passing through one side of the main body,

An outlet end passing through the other side portion of the main body portion,

And a cooling module for supplying air to be cooled to a temperature set at the inlet end and discharging air supplied through the outlet end to circulate the air through the internal space of the main body part For example.
The method according to claim 6,

Wherein the inlet end and the outlet end are formed in plural,

Wherein the light guide plate is formed as an inclined hole facing the light output portion.
The method according to claim 6,

The cooling unit includes:

And a heat dissipating member installed in an inner space of the main body portion,

The heat-

Wherein the plurality of substrates are arranged below the plurality of substrates.
9. The method of claim 8,

The upper end of the heat-

And forming a profile that forms the radius of curvature in which the plurality of substrates are disposed.
10. The method of claim 9,

The upper end of the heat-

Wherein the plurality of substrates are formed so as to be in physical contact with the bottom surfaces of the plurality of substrates.