KR101007324B1 - Focus and photographing area is controlled automatically component recognition device and method - Google Patents

Abstract

The component recognition apparatus and method for automatically adjusting the focus and the photographing area according to the size of the component according to the present invention includes a guide having a fixed lens portion upward for a component recognition and a movement path up and down from the fixed lens portion. An additional body; Reflector plate which is moved up and down inside the main body; A movable lens part which is moved up and down by a driving device in a movement path of the guide part together with the reflecting plate; A camera positioned below the movable lens unit to photograph a component; A light emitting part provided inside the main body to irradiate light to the reflecting plate moved together with the movable lens part; And a light receiving unit provided inside the main body to measure the amount of light reflected from the light emitting unit by the light reflected from the reflecting plate and upwardly incident thereto.

According to the present invention, in order to adjust the focusing point of view and the field of view (FOV) according to the size of the component, after irradiating light to the reflecting plate installed on a part of the lens and measuring the amount of light reflected, By positioning the movable lens unit at a position at which the same amount of light as the light amount information of the corresponding parts is incident, there is an advantage that the focus and photographing area of the lens can be accurately and quickly adjusted according to the size of the part.

Component mounter, component recognition device, focus, angle of view

Description

Focus and photographing area is controlled automatically component recognition device and method

The present invention relates to a component recognition device used in a component mounter, and in particular, by automatically adjusting the position of the lens according to the size of the component, focus and according to the size of the component that can accurately and quickly adjust the focus and shooting area of the lens The present invention relates to a component recognition apparatus and method for automatically adjusting a photographing area.

In general, a component mounter (chip mounter) is a device for mounting an electronic component such as a semiconductor package on a substrate (PCB).

In recent years, since the substrate has a high density and high function, the electronic components installed on the substrate also have a high function. As a result, the output pins mounted on the substrate increase, and the spacing between the output pins becomes narrower. Therefore, there has been a demand for accurately mounting electronic components on substrates through component mounters.

As described above, in order to accurately mount the electronic components on the substrate in the component mounter, before the electronic components supplied from the electronic component supply apparatus are mounted on the substrate, the adsorption state, the center position, and the like of the components picked up at the head portion are changed. It must be confirmed correctly.

In other words, the electronic parts should be mounted on the board after performing an arithmetic calculation of what state should be mounted before mounting parts by quantifying the current state while moving or stopping. For this purpose, a part recognition device for photographing the electronic parts picked up in the head part before mounting the electronic parts was used.

As shown schematically in FIG. 1, the component recognition device 1 includes a camera unit 2 for capturing an image of the component S adsorbed by the suction nozzle 10 of the head unit in the component mounter to acquire an image. , Most of them are made of a lighting unit (3) for irradiating light. Of course, in addition to the component recognition apparatus shown, component recognition apparatuses having various configurations are used.

Such a conventional component recognition device is positioned in a state where a lens located above the camera unit is fixed so that there is no variation in vibration and vibration. Such a fixed lens structure is limited in use because it can not be adjusted to the lens focus and the angle of the range that can be taken, that is, the field of view (FOV) according to the size of the component.

Therefore, the work of adjusting the focus and angle of view of the lens according to the size of the part to be recognized was performed in parallel. This was cumbersome with additional work, such as installing additional devices by the operator.

In order to solve this problem, in recent years, a component recognition device using a bifocal lens or a non-distorted lens is used as a component recognition device of a component mounter, but such a component recognition device needs to be operated by a user. There was a problem that the accuracy of the focus and angle of view adjustment is poor and takes a lot of adjustment time.

In addition, the conventional manual adjustment method can increase the fatigue of the operator by the lens adjustment is made frequently, thereby causing a problem of poor work efficiency.

Therefore, in order to solve the above conventional problem, the present invention is to propose a technology that can automatically adjust the position of the lens according to the size of the part to be recognized based on the information of the parts set in the controller of the component mounter. .

Therefore, the present invention is to solve the conventional problems as described above, after irradiating the light to the reflecting plate moving with the movable lens unit so that the distance between the fixed lens unit and the control unit by measuring the amount of light reflected light By automatically positioning the lens at the position where the amount of light equal to the amount of light information of the corresponding component is set in advance, focus and shooting according to the size of the part can accurately and quickly adjust the focus and angle of view (FOV) of the lens. It is an object of the present invention to provide a component recognition apparatus and method in which the area is automatically adjusted.

The present invention for achieving the above object is provided with a fixed lens portion for the upper part for the part recognition, the main body provided with a guide portion having a movement path up and down from the fixed lens portion; Reflector plate which is moved up and down inside the main body; A movable lens part which is moved up and down by a driving device in a movement path of the guide part together with the reflecting plate; A camera positioned below the movable lens unit to photograph a component; A light emitting part provided inside the main body to irradiate light to the reflecting plate moved together with the movable lens part; And a light receiving unit provided inside the main body to measure an amount of light reflected from the light emitting unit by the light emitted from the light emitting unit and incident upwardly.

Here, the light emitting unit may include a first pin hole penetrating up and down from below the main body; A light source installed inside the first pin hole to irradiate light upwards, wherein the light receiving unit includes a second pin hole penetrated up and down from below the main body; And an optical sensor provided below the second pin hole. In addition, the light source preferably uses an LED lamp.

The light emitting unit inserts one end of the optical fiber into the first pin hole to irradiate light to the reflecting plate, and the light source supplies light to the other end of the optical fiber.

The light receiving unit may receive light incident by placing one end of the optical fiber in the second pin hole, and measure the amount of light incident by placing the optical sensor at the other end of the optical fiber.

On the other hand, the driving device may use a piezoelectric element (piezoelectric element) method in which the rod is moved up and down to adjust the upper and lower positions of the movable lens portion and the reflecting plate.

In addition, the driving device may be installed vertically inside the main body to use a linear motor for adjusting the vertical position of the movable lens unit and the reflecting plate.

According to another aspect of the present invention, there is provided a fixed lens unit at an upper portion for component recognition, and a main body provided with a guide unit having a movement path up and down from the fixed lens unit; Reflector plate which is moved up and down inside the main body; A movable lens unit which is moved up and down by a driving device in a movement path of the guide unit together with the reflecting plate; A light emitting part provided on an inner side of the main body to irradiate light to the reflecting plate moved with the movable lens part; And a camera positioned below the movable lens unit to measure the amount of light reflected by the reflector and to photograph an image of the component.

Another feature of the invention, here, the first step of presetting the information of the parts in the control unit of the component mounter; A second step of inputting, to the controller, a part to be recognized among information of the parts of the first step; A third step of irradiating light to the reflecting plate moving up and down together with the movable lens part so that the light emitting part is turned on and the distance is fixed to the lower fixed lens part during the component recognition operation after inputting the recognition part in the second step; A fourth step of, when the light irradiated in the third step is reflected on the reflecting plate, the reflected light is incident on the light receiving unit to measure the amount of light; A fifth step of adjusting the focus and angle of view by stopping the movable lens unit and the reflecting plate at a position where the same amount of light as the amount of light input information of the component set in the first step is incident while analyzing the amount of light measured in the fourth step; And a sixth step of recognizing the part in a state in which the focus and the angle of view are adjusted in the fifth step.

Here, in the fifth step, the movable lens unit and the reflecting plate may be stopped at a position where the amount of incident light is maximized.

The method may further include re-measuring the light amount at the adjusted position by re-lighting the light emitting unit in the stopped state.

As described above, the present invention measures the amount of light incident and automatically adjusts the position of the lens, so that it is possible to photograph all kinds of components with one component recognition device, which is an efficient advantage.

In addition, by adjusting the position of the lens to adjust the position of the lens to adjust the focus and the shooting area, the position of the lens is variably adjusted using the amount of light incident on the basis of preset part information, thereby reducing the adjustment time according to the change of parts and also recognizing the parts. There is an advantage to ensure the accuracy of.

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

FIG. 2 is a cross-sectional view schematically illustrating a component recognition device in which a focus and a photographing area are automatically adjusted according to the size of a component according to the present invention. FIG. Figure 4 is a step showing the adjustment step for the method of the component recognition device that the focus and the shooting area is automatically adjusted according to the size of the component according to the present invention, Figure 5 is a reflecting plate, a light emitting unit according to another embodiment of the present invention And enlarged main part of the light receiving unit.

As shown, the component recognition device 100 of the present invention includes a main body 200, a reflecting plate 300, a movable lens unit 400, a camera 500, a light emitting unit 600 and a light receiving unit 700. .

The main body 200 is provided with a fixed lens unit 210 in the upper portion for photographing the parts, the lower portion of the fixed lens unit 210 is provided with a guide portion 220 for forming a movement path up and down.

The fixed lens unit 210 is installed above the main body 200, and the plurality of lenses are disposed to have a predetermined interval up and down. That is, the image of the part seen through the fixed lens unit 210 is photographed by the camera 500 through the movable lens unit 400 which will be described later, and the photographed image is a controller (not shown) of the component mounter (not shown). Is applied.

The guide part 220 has a predetermined length along the inside of the main body 200 from below the main body 200, and the upper and lower parts of the guide part 220 are in an open state. That is, the movable lens unit 400 to be described later may move up and down along the inner moving area of the guide unit 220.

The reflecting plate 300 is moved up and down from the outside of the guide unit 220, the reflecting plate 300 is a light receiving unit 700 is irradiated by the light source 620 of the light emitting unit 600 to be described later Through the second pin hole 710 of the to enter.

Here, the reflecting plate 300 is moved up and down together with the movable lens unit 400 which will be described later in the body 200. The reflective plate 300 is preferably positioned at right angles to the outer circumferential surface of the guide unit 220 described above.

As such, the reflecting plate 300 is elevated together with the movable lens unit 400, which will be described later, to accurately determine the height of the movable lens unit 400 for adjusting the focus and the field of view (FOV).

As described above, the movable lens unit 400 is adjusted up and down within the movement path of the guide unit 220 together with the reflecting plate 300.

The movable lens unit 400 is moved up and down inside the guide unit 220 together with the reflecting plate 300 to adjust the distance to the fixed lens unit 210. Herein, the movable lens unit 400 may be disposed in a plurality of lenses up and down like the fixed lens unit 210.

That is, the movable lens unit 400 is positioned up and down inside the guide unit 220, and the above-mentioned reflector plate 300 is movable the lens unit 400 outside the guide unit 220. The position is changed by the driving device 410 together with.

The driving device 410 is provided inside the main body 200 to move the movable lens unit 400 and the reflecting plate 300 up and down, and to elevate the movable lens unit 400 and the reflecting plate 300. It is preferable to be installed to have a length perpendicular to the inner one side of the main body 200.

As the type of the driving device 410, a rod may be driven up and down using a piezoelectric element. That is, it is preferable that the rod of the driving device 410 using the piezoelectric element has a structure in which the movable lens unit 400 and the reflecting plate 300 are raised and lowered.

On the other hand, the driving device 410 may use a linear motor (not shown) capable of linear reciprocating motion to move the movable lens unit 400 up and down, in addition to the organic mesh of the gear (not shown) And a driving motor (not shown) for rotating the gears, the movable lens unit 400 may be finely lifted up and down.

The camera 500 is disposed below the movable lens unit 400 and has a function of capturing a component visible through the movable lens unit and applying an image of the component to the controller of the component mounter.

The light emitting unit 600 is provided inside the main body 200 to irradiate light to the reflecting plate 300 moved by the driving device 410, and the main body corresponding to the outside of the guide unit 220. It is located at the upper edge portion of the (200).

That is, the light emitting unit 600 is preferably provided at a position corresponding to the reflecting plate 300 so that the irradiated light can be reflected.

The light emitting unit 600 includes a first pin hole 610 penetrating up and down from the lower surface of the main body 200 and a light source installed inside the first pin hole 610 to irradiate light downwardly ( 620 is provided.

The first pin hole 610 is penetrated to form a straight line up and down to allow the light of the light source 620 to be irradiated in a straight line. The light irradiated upward in this way is reflected by the reflector 300 to be described later and incident again to the light receiving part 700 positioned below.

Here, the light source 620 is preferably used an LED lamp, all of the light such as a general halogen lamp may be used.

The light receiving unit 700 includes a second pin hole 710 penetrating up and down from a lower surface of the main body 200, and an optical sensor 720 installed under the second pin hole 710.

The second pin hole 710 serves as a path through which the light of the light source 620 is reflected by the reflector 300 described above. In addition, the light incident through the second pin hole 710 is transmitted to the optical sensor 720 located below to measure the amount of light.

That is, it is possible to check whether the adsorption state of the parts attached to the adsorption nozzle of the head of the component mounter is correct, and the arrangement state of the parts when registering the parts in the component mounter.

In another embodiment of the present invention, as shown in FIG. 5, the light emitting part 600 irradiates light downward by placing one end of the optical fiber 800 in the first pin hole 610, and the other end of the optical fiber 800. Light may be supplied through the light source 620.

In addition, the light receiving unit 700 is positioned at one end of the optical fiber 800 in the second pin hole 710 so that light is incident, and the optical sensor 720 is positioned at the other end of the optical fiber 800 and is incident The amount of light can be measured.

According to another embodiment of the present invention, the main body is provided with a fixed lens unit 210 above the part for recognition, and a guide unit 220 having a movement path up and down under the fixed lens unit 210. 200, a reflection plate 300 which is moved up and down inside the main body 200, and the driving device 410 in the movement path of the guide unit 220 together with the reflection plate 300. The light emitting part provided inside the main body 200 to irradiate light to the movable lens unit 400 which is moved up and down and the reflecting plate 300 which is moved together with the movable lens unit 400 ( 600, and a camera 500 positioned below the movable lens unit 400 to measure light quantity of the light reflected by the reflector 300 and to photograph an image of a component.

That is, according to another embodiment of the present invention, the light irradiated from the light emitting unit 600 is reflected to the reflecting plate 300 without having a separate light receiving unit and immediately enters the camera 500 through the movable lens unit 400. It is a structure for measuring the amount of light.

Accordingly, the position of the movable lens unit 400 may be appropriately adjusted according to the type of the component based on the information of the component (such as the amount of light set differently according to the size of the component) preset in the controller of the component mounter.

Hereinafter, a method of a part recognition device in which a focus and a photographing area are automatically adjusted according to the size of a part according to an embodiment of the present invention will be described.

As shown in FIG. 4, the first step (S100) is a step of presetting information of parts on a controller of the component mounter. In the above step, in order to reset the focus and the angle of view as the reference for the part to be recognized, information about the parts to be recognized is input to the controller of the component mounter in advance.

Next, the second step S200 inputs a part to be recognized from the information on the parts of the first step S100 to the controller.

That is, in the step, when re-recognizing a part having a different size from the previously recognized part, the predetermined distance from the fixed lens unit 210 based on the information of the parts (part type, light quantity information of the parts, etc.) preset in the controller. The position of the movable lens unit 400 has to be readjusted.

For example, if a large part is being photographed while a small part is being recognized, the focus and shooting area must be reset in this way to maintain the accuracy of the recognition of the part because the lens is in close focus. Should give.

Next, in the third step (S300) after inputting the recognition component in the second step (S200), during the component recognition operation, the light emitting unit 600 is turned on so that the movable lens to adjust the distance to the upper fixed lens unit 210. The light is irradiated onto the reflector 300 that moves up and down with the unit 400.

Next, in the fourth step S400, when the light irradiated in the second step S200 is reflected on the reflector 300, the reflected light is incident on the light receiving unit 700 to measure the amount of light.

That is, as the movable lens unit 400 moves up and down, the amount of light from the light source 620 enters the light receiving unit 700 varies. At this time, the point corresponding to the measured light amount is determined based on the component information set in the controller of the component mounter. This measurement step is preceded for this purpose.

Next, in the fifth step (S500) while analyzing the light amount measured in the fourth step (S400) in the first step (S100), the movable lens unit ( 400 and the reflector 300 are stopped to adjust the focus and angle of view.

In the fifth step S500, the movable lens 400 and the reflector 300 may be stopped at a position where the amount of incident light is maximized. In addition, the fifth step (S500) may further include the step of re-measuring the amount of light at the adjusted position by re-lighting the light emitting unit in the stopped state.

Finally, in the sixth step S600, the part is recognized in a state in which the focus and the angle of view are adjusted in the fifth step S500.

As a result, the present invention by measuring the amount of light incident light automatically adjusts the position of the lens, it is possible to take all kinds of parts with a single component recognition device 100 has the advantage of being efficient. In addition, by adjusting the position of the lens to adjust the position of the lens to adjust the focus and the shooting area, the position of the lens is variably adjusted using the amount of light incident on the basis of preset part information, thereby reducing the adjustment time according to the change of parts and also recognizing the parts. There is an advantage to ensure the accuracy of.

Although the technical idea of the component recognition apparatus and method for automatically adjusting the focus and the photographing area according to the size of the parts of the present invention has been described with the accompanying drawings, this is illustrative of the best embodiment of the present invention by way of example. It does not limit the invention.

Accordingly, it is a matter of course that various modifications and variations of the present invention are possible without departing from the scope of the present invention. And are included in the technical scope of the present invention.

1 is a view showing a conventional component recognition device.

Figure 2 is a schematic cross-sectional view showing a component recognition device for automatically adjusting the focus and the shooting area according to the size of the component according to the present invention.

3 is an enlarged view illustrating main parts of the reflector, the light emitting unit, and the light receiving unit according to FIG. 2;

Figure 4 is a step showing the adjustment step for the method of the component recognition device that the focus and the shooting area is automatically adjusted according to the size of the component according to the present invention.

5 is an enlarged view illustrating main parts of a reflector, a light emitting unit, and a light receiving unit according to another embodiment of the present invention;

Description of the Related Art

100: part recognition device 200: main body

210: fixed lens unit 220: guide unit

300: reflector 400: movable lens unit

410: drive 500: camera

600: light emitting unit 610: first pin hole

620: light source 700: light receiving unit

710: second pin hole 720: optical sensor

800: optical fiber

Claims (11)

A main body provided with a fixed lens part upward for component recognition, and a guide part having a movement path up and down from below the fixed lens part; Reflector plate which is moved up and down inside the main body; A movable lens part which is moved up and down by a driving device in a movement path of the guide part together with the reflecting plate; A camera positioned below the movable lens unit to photograph a component; A light emitting part provided inside the main body to irradiate light to the reflecting plate moved together with the movable lens part; And And a light receiving unit provided inside the main body to measure the amount of light reflected from the light emitting unit by the light emitted from the light emitting unit upwardly, according to the size of the component. Automated part recognition device. The method of claim 1, The light emitting unit may include a first pin hole penetrating up and down from below the main body; A light source installed inside the first pin hole to irradiate light upward; The light receiving unit includes a second pin hole penetrating up and down from below the main body; And an optical sensor disposed below the second pin hole, wherein the focus and the photographing area are automatically adjusted according to the size of the component. The method of claim 2, The light source is a component recognition device that the focus and the shooting area is automatically adjusted according to the size of the component, characterized in that using the LED lamp. The method of claim 2, The light emitting unit inserts one end of the optical fiber into the first pin hole to irradiate light to the reflecting plate, And a light source for supplying light to the other end of the optical fiber, wherein the focus and the photographing area are automatically adjusted according to the size of the component. The method of claim 4, wherein The light receiving unit receives an incident light by placing one end of the optical fiber in the second pin hole, The other end of the optical fiber is a component recognition device for automatically adjusting the focus and the shooting area according to the size of the component, characterized in that for measuring the amount of light incident by placing the optical sensor. The method of claim 1, The driving device uses a piezoelectric element method in which rods moving up and down adjust the up and down positions of the movable lens unit and the reflecting plate. Adjustable part recognition device. The method of claim 1, The driving device is installed vertically inside the main body, the component recognition device that automatically adjusts the focus and the shooting area according to the size of the component, characterized in that for using the linear motor for adjusting the upper and lower positions of the movable lens unit and the reflecting plate . A main body provided with a fixed lens part upward for component recognition, and a guide part having a movement path up and down from below the fixed lens part; Reflector plate which is moved up and down inside the main body; A movable lens unit which is moved up and down by a driving device in a movement path of the guide unit together with the reflecting plate; A light emitting part provided inside the main body to irradiate light to the reflecting plate moved together with the movable lens part; And And a camera positioned below the movable lens unit to measure the amount of light reflected by the reflector and to take an image of the component. The component recognition apparatus of which the focus and the photographing area are automatically adjusted according to the size of the component. A first step (S100) of presetting information of parts in a control unit of the component mounter; A second step (S200) of inputting a part to be recognized, from the information on the parts of the first step (S100) to the controller; After inputting the recognition part in the second step (S200), the third step of irradiating light to the reflecting plate moving up and down with the movable lens unit so that the light emitting unit is turned on during the component recognition operation to adjust the distance to the upper fixed lens unit (S300); A fourth step (S400) of measuring the amount of light when the light irradiated in the third step (S300) is reflected on the reflection plate and the reflected light is incident on the light receiving unit; The focus and angle of view are adjusted by stopping the movable lens unit and the reflecting plate at a position where the same amount of light as the amount of light input information of the component set in the first step is incident while analyzing the amount of light measured in the fourth step (S400). Step 5 (S500); And And a sixth step (S600) of recognizing the part in a state in which the focus and the angle of view are adjusted in the fifth step (S500). Way. 10. The method of claim 9, In the fifth step (S500), the focusing and the photographing area is automatically adjusted according to the size of the component, characterized in that for stopping the movable lens unit and the reflector at a position where the amount of incident light is the maximum. 10. The method of claim 9, In the fifth step (S500), the step of re-lighting the light emitting unit in the stopped state to re-measure the amount of light at the adjusted position; the focus and the shooting area is automatically adjusted according to the size of the component Method of component recognition device being.

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