KR20220072183A - Apparatus for measurement with In-Line Process - Google Patents

Abstract

The in-line dimension measuring device according to an embodiment of the present invention is an in-line dimension measuring device for measuring the dimensions of an object in an in-line state in which the target object moves, and irradiating parallel illumination from the front side of the target object toward the target object. Telecentric illumination, a rear light that irradiates parallel green light from the back of an object toward the object, a telecentric lens to transmit the light reflected from the object to the camera, and a parallel light that passes through the telecentric lens It includes a camera that receives light to take pictures of an object, a telecentric light, a rear light, a telecentric lens, and a fixed stage for fixing the camera. Since the size of the object is measured in an inline method, it is possible to measure the size quickly. It is possible, and since it minimizes operator interference, it has the effect of enabling accurate dimensional measurement.

Description

In-line dimension measuring device {Apparatus for measurement with In-Line Process}

The present invention relates to an inline dimension measuring device, and more particularly, to an inline dimension measuring device capable of fast and accurate dimension measurement in an inline manner.

[R&D project supporting this invention] 2019 3rd Gyeonggi-do Technology Development Project

[Project unique number] D202018

[Buddhist name] Gyeonggi-do

[Research and management institution] Gyeonggi Techno Park

[Research project name] In-line precision measuring instrument with 8X telecentric fixed focus magnification conversion lens grafted

[Research institute] Vision Cowork

[Research Period] 2020-02-01 ~ 2021-05-31

Currently, there are many difficulties in quality control in the field and measurement departments of the existing parts production line due to the time and cost required for dimensional measurement and the deviation according to the operator. As technology for processing shapes is actively developing, precision measurement technology for processed products is more demanded, and reliability of processing equipment is gradually being secured due to improved precision of core parts and modules. the current situation.

In the field of measurement, the demand for measuring instruments that can measure quickly with simple operation is increasing, and various measuring instruments are applied to the field. There is a problem in that enormous effort and time are required for the measurer to learn how to use all measuring instruments because each complex setting is required.

In general, various measuring instruments and CNC image measuring instruments with improved precision are used, but manual measuring instruments other than CNC (Computer Numerical Control) image measuring instruments are suitable for easy measurement, but there is a problem that it takes a long time for human hands and measurement. , an automatic measuring machine, such as a CNC image measuring machine, can perform automatic measurement with high precision, but has a limitation in that it is expensive because it takes time to move the stage on the XYZ axis and the system configuration is complicated.

Republic of Korea Patent Publication No. 10-2019-0060687

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide an in-line dimension measuring apparatus capable of fast and accurate dimension measurement in an in-line manner.

In the in-line dimension measuring device according to an embodiment of the present invention for solving the above problems, the in-line dimension measuring device for measuring the dimension of the target object in an in-line state in which the target object moves, from the front side of the target object Telecentric illumination for irradiating parallel illumination toward the object; a rear light irradiating parallel green light from the rear surface of the object toward the object; a telecentric lens for transmitting the light reflected from the target to the camera; a camera receiving the parallel light passing through the telecentric lens and photographing the target object; and a fixing stage for fixing the telecentric light, the rear light, the telecentric lens and the camera.

Here, the telecentric lens may have a fixed focus.

Here, the telecentric lens may be capable of four types of magnification conversion.

Here, the four types of magnification may be selectable from 1x, 2x, 4x, and 8x.

Here, the dimension measurement value may be corrected according to the selected magnification.

Here, the telecentric illumination, the telecentric lens, and the camera may be capable of linear movement on the fixed stage in the direction of the target object.

Here, the camera may detect an edge line of the target object to measure a dimension and an angle of the target object.

Here, the moving speed of the target object may be determined according to the photographing speed of the camera.

According to the inline dimension measuring apparatus according to an embodiment of the present invention, since the dimension is measured in an inline method, there is an effect that a quick dimension measurement is possible, and since the operator's interference is minimized, there is an effect that a more accurate dimension measurement is possible.

In addition, since telecentric lighting and lenses are used, the dimensions of the object can be accurately measured, and the dimensions are corrected according to the magnification, so that accurate measurement of the dimensions of the object is possible.

In particular, since the inline method and telecentric illumination and lens are used together, there is an advantage in that various types of dimensions such as outer diameter, step, width, distance, pitch, and thickness can be measured more efficiently.

1 is a view for explaining an in-line dimension measuring apparatus according to an embodiment of the present invention.
2 is a view for explaining a product developed for an in-line dimension measuring device according to an embodiment of the present invention.
3 is a view for explaining one type of measurement that can be measured in an in-line dimension measuring apparatus according to an embodiment of the present invention.
4 is a view for explaining another type that can be measured in the in-line dimension measuring apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be implemented in several different forms and is not limited to the embodiments described herein.

In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

Throughout the specification, when a part is "connected" with another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element interposed therebetween. . Also, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

When a part is referred to as being “above” another part, it may be directly on the other part, or the other part may be involved in between. In contrast, when a part refers to being "directly above" another part, no other part is involved in between.

The terms first, second and third etc. are used to describe, but are not limited to, various parts, components, regions, layers and/or sections. These terms are used only to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, a first part, component, region, layer or section described below may be referred to as a second part, component, region, layer or section without departing from the scope of the present invention.

The terminology used herein is for the purpose of referring to specific embodiments only, and is not intended to limit the present invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite. The meaning of "comprising," as used herein, specifies a particular characteristic, region, integer, step, operation, element and/or component, and includes the presence or absence of another characteristic, region, integer, step, operation, element and/or component. It does not exclude additions.

Terms indicating a relative space such as “below” and “above” may be used to more easily describe the relationship of one part shown in the drawing to another part. These terms, along with their intended meanings in the drawings, are intended to include other meanings or operations of the device in use. For example, if the device in the drawings is turned over, some parts described as being "below" other parts are described as being "above" other parts. Thus, the exemplary term “down” includes both the up and down directions. The device may be rotated 90 degrees or at other angles, and terms denoting relative space are interpreted accordingly.

Although not defined otherwise, all terms including technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Commonly used terms defined in the dictionary are additionally interpreted as having a meaning consistent with the related technical literature and the presently disclosed content, and unless defined, are not interpreted in an ideal or very formal meaning.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be implemented in several different forms and is not limited to the embodiments described herein.

1 is a view for explaining an in-line dimension measuring apparatus according to an embodiment of the present invention. 2 is a view for explaining a product developed for an in-line dimension measuring device according to an embodiment of the present invention. 3 is a view for explaining a type of measurement that can be measured in an in-line dimension measuring apparatus according to an embodiment of the present invention. 4 is a view for explaining another type that can be measured in the in-line dimension measuring apparatus according to an embodiment of the present invention.

1 to 4 together, the in-line dimension measuring device 100 according to an embodiment of the present invention is an in-line dimension measuring device 100 for measuring the dimensions of the target object in an in-line state in which the target object moves. In the front of the object, telecentric (telecentric) illumination for irradiating parallel illumination toward the object (110); a rear light 120 irradiating parallel green light from the rear surface of the object toward the object; a telecentric lens (lens, 130) for transmitting the light reflected from the target to the camera; a camera 140 receiving the parallel light passing through the telecentric lens and photographing the target object; and a fixing stage 150 for fixing the telecentric light, the rear light, the telecentric lens and the camera.

The in-line dimension measuring apparatus measures the dimensions of the target object in a moving state, that is, in a non-stop state, and the target object may be moved by a conveyor belt or the like. Since dimension measurement is possible in a moving state rather than a stationary state, a fast manufacturing process can be implemented.

1 and 2 together, the inline dimension measuring apparatus 100 according to an embodiment of the present invention has the components as shown in FIG. 1, and the conceptual structure of a product currently under development is shown in FIG. is shown. That is, as shown in FIG. 2 , the target object is supplied in an in-line manner while moving in the left-right direction, and the in-line dimension measuring apparatus 100 according to an embodiment of the present invention provides the target object supplied in an in-line manner. It may be to measure the dimensions by taking a picture.

The telecentric illumination 110 may be to irradiate parallel illumination from the front side of the target object toward the target object.

Telecentric refers to a system that can transmit and receive parallel light regardless of a parallel distance. That is, telecentric illumination is lighting that prevents image deformation due to change in magnification of the image by adjusting the aperture to the focal point of the projection lens, and has a feature that does not cause dimensional errors, and telecentric lenses have the entrance pupil or exit pupil A mixed lens whose Exit Pupil is at infinity. This means that the chief ray is parallel to the axis at the front or back of the system.

The back light 120 may be to irradiate a parallel green light from the rear surface of the target object toward the target object. In particular, parallel light may be irradiated from the rear side to detect an edge line of the target object.

The telecentric lens 130 may be for transmitting light reflected from the target object to the camera. This is because, in order to measure the exact dimensions of the target object, it is essential to transmit parallel light to the camera.

Accordingly, the telecentric lens 130 has a fixed focus, and may transmit parallel light to the camera.

The telecentric lens 130 may be capable of converting 4 types of magnifications, and the 4 types of magnifications may be selectable from 1x, 2x, 4x, and 8x. In addition, the dimensional measurement value may be corrected according to the selected magnification.

For example, when the conversion table is completed by comparing the dimensions in the image captured by the camera 140 and the measured dimensions of the target object, the telecentric lens 130 obtains a magnification of 1x. When selected, the dimensions of the object can be determined by using the conversion table as it is, but when the magnification is 4 times, a correction value corresponding to 4 times the value of the conversion table must be applied to determine the dimensions of the object because there will be

The camera 140 may be provided with parallel light passing through the telecentric lens 130 to photograph the target object, and apply the conversion table value to the captured image to determine the dimensions of the target object may be deciding

The fixing stage 150 may be for fixing the telecentric light 110 , the rear light 120 , the telecentric lens 130 , and the camera 140 . That is, the reason why the fixed stage 150 is necessary is that the telecentric light 110 , the rear light 120 , the telecentric lens 130 , and the camera 140 must be positioned so as not to deviate from the shooting direction. This is because accurate measurement of the target is possible.

Meanwhile, the telecentric lighting 110 , the telecentric lens 130 , and the camera 140 may be capable of linear movement on the fixed stage 150 in the direction of the target object. This is because, since photographing and dimension measurement are performed using parallel light, even if the object is linearly moved on the fixed stage 150 in the direction of the target object, photographing and dimension measurement are not affected.

The camera 140 may detect an edge line of the target object and measure a dimension and an angle of the target object. The telecentric lens 130 transmits the parallel light reflected from the target to the camera 140 , and irradiates the parallel light from the rear light 120 in the direction of the camera 140 . This is because it is essential to receive parallel light from the camera 140 in order to measure an accurate dimension of the target object.

Referring to FIG. 3 , the in-line dimension measuring apparatus 100 according to an embodiment of the present invention may measure the outer diameter, step, and width of the target object as shown in FIG. 3( a ), and as shown in FIG. 3( b ). It is possible to measure the distance between the centers of circles, the distance between points and straight lines, and the distance between the points of intersection, and as shown in FIG. You will be able to measure height, position and coordinates.

Meanwhile, referring to FIG. 4 , the in-line dimension measuring apparatus 100 according to an embodiment of the present invention may measure the outer diameter, pitch, and angle of the spring as shown in FIG. 4(a), and FIG. 4(b) and As such, it is possible to measure the outer diameter, overall length, and tip angle of the needle valve, and it will be possible to measure the groove pitch and V groove angle of the solution as shown in FIG. 4(c).

In addition, it will be possible to measure the roundness and thickness of the O-ring as shown in Fig. 4(d), the diameter and height of the lens may be measured as shown in Fig. 4(e), and the plastic bottle as shown in Fig. 4(f). You will be able to measure the outer diameter and distance.

In the inline dimension measuring apparatus 100 according to an embodiment of the present invention, the moving speed of the target object may be determined according to the photographing speed of the camera 140 . This is because, in order to form the maximum process speed, the target object must be continuously supplied according to the photographing speed of the camera 140 .

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. you will be able to understand For example, those skilled in the art may change the material, size, etc. of each component according to the field of application, or combine or substitute the disclosed embodiments in a form not explicitly disclosed in the embodiment of the present invention, but this is also It does not depart from the scope of the invention. Therefore, the embodiments described above are not to be understood as illustrative and limiting in all respects, and it should be said that these modified embodiments are included in the technical spirit described in the claims of the present invention.

100: inline dimension measuring device
110: telecentric lighting
120: back light
130: telecentric (telecentric) lens (lens)
140: camera
150: fixed stage

Claims (8)

In the in-line dimension measuring device for measuring the dimension of the target object in an in-line state in which the target object moves,
Telecentric illumination for irradiating parallel illumination toward the target from the front of the target;
a rear light irradiating parallel green light from the rear surface of the object toward the object;
a telecentric lens for transmitting the light reflected from the target to the camera;
a camera receiving the parallel light passing through the telecentric lens and photographing the target object; and
a fixing stage for fixing the telecentric light, the rear light, the telecentric lens and the camera;
An in-line dimensioning device comprising a. According to claim 1,
The telecentric lens is an inline dimension measuring device, characterized in that it has a fixed focus. According to claim 1,
The telecentric lens is an inline dimension measuring device, characterized in that four types of magnification conversion is possible. 4. The method of claim 3,
The four types of magnification are 1x, 2x, 4x, and 8x. 5. The method of claim 4,
The inline dimension measuring device, characterized in that correcting the dimension measurement value according to the selected magnification. According to claim 1,
The telecentric illumination, the telecentric lens and the camera are in-line dimension measuring apparatus, characterized in that it is possible to linearly move in the direction of the target on the fixed stage. According to claim 1,
The camera detects an edge line (Edge Line) of the object to measure the size and angle of the object in-line dimension measuring apparatus. According to claim 1,
The in-line dimension measuring apparatus, characterized in that the speed at which the target object moves is determined according to the photographing speed of the camera.

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