KR200296193Y1 - Parts Checking Machine with vision system - Google Patents

Abstract

The present invention is a component of the vision system in the part selector that selects the parts to be inspected by the optical camera and analyzes the image data and compares the good and bad parts of the parts with the images of the good stored in the memory of the control device in advance. Unlike the existing products that install them separately for each work environment, all the necessary components, such as cameras, lights, parts transfer devices and parts ejection devices, are all combined in one body to create the optimal environment for parts selection. By eliminating factors that degrade performance such as noise signal and diffuse reflection of light that can be received from the outside, it is equipped with improved component selection function.

Conventionally, the lighting system that matches the direction and brightness of the lighting facility, the difficult part transfer technology that passes the parts in front of the camera at a constant speed and height, and the technology that discharges the parts judged as defective produce the vision system. It was a problem that could not be easily applied in the field.

On the other hand, the device of this paper has the most optimal lighting system inside the device in advance, and the parts conveying device such as the conveyor with the optimal condition is built in one body so that the user only needs to put the parts to be sorted. Is a device that automatically transfers the parts to the inside of the device and collects good and defective items after discharge in a good environment for measurement.

Description

Parts Checking Machine with vision system

The inspection device or screening device using the existing vision system, in terms of its function, was able to perform a considerable function in a good surrounding environment, thereby greatly increasing the level of conventional automation. However, the current vision system is mostly manufactured on the basis of a PC, and when it is used in the field, a computer or controller for a vision system, a part auto supply device, a camera, lighting, a part detection sensor, and a defective product discharge device are separately installed. The ability to cope with various obstacles, such as noise signals from various poor working environments, brightness of the surrounding environment, and processing of connecting cables between various devices, is significantly reduced. In addition, there is a problem in that it is difficult to accumulate technology and cannot easily respond to failures because it is not used uniformly according to the environment and is applied differently in every application case.

In this design, the parts supply device, camera, lighting, sensor, controller, and defective product ejection mechanism are all integrated in one body, so that the most optimal shooting conditions are provided from the beginning. Simply install the device and the vision system allows the parts to be selected.

Therefore, in such a system, the parts to be sorted can be transported in front of the camera, and even if the conveying speed of the parts of the conveyor changes, it can be taken consistently with the speed. Should be kept constant at all times. In addition, the defective product determined to be defective should be discharged quickly to a certain place. In this diverse and poor field, it is a task of the present invention to complete the application of a very sensitive vision system by simply installing a vision system package of one body.

These functions and features will be described in detail with reference to the accompanying drawings.

1 is a basic configuration illustrating a part sorter according to the present invention,

Figure 2 is an exemplary view excluding the controller housing, showing the inclination of the present invention,

3 is a front view excluding the controller housing of FIG.

4 is a plan view excluding the controller housing of FIG. 1;

5 is an electrical signal flow diagram of the present invention.

* Explanation of Signs of Major Parts of Drawings

1. Control panel 2. Controller housing

3. Parts conveying conveyor belt

31. Belt adjustment bolt

4. Conveyor belt guide.

5. Parts transporting vertical wall.

51. Exhaust Injection Hole # 1 52.Exhaust Injection Hole # 2

53. Discharge Injection Valve # 1 54. Discharge Injection Valve # 2

6. Conveyor Driven Motor 7. Camera

8. LED for lighting

81. Lighting LED housing 82. Lighting section cover

9. Rotational speed sensing encoder 10. Base for fixing

11. Power switch 12. Component detection sensor

The present invention, as shown in Figure 1, the camera unit, the lighting unit, the cover and the tunnel portion, the conveyor belt and the drive motor unit for conveying the parts, the good and defective by the algorithm of the input signal received by the camera to select All parts necessary for vision system are composed of one package such as controller part for command of discharge, operation control part for user's input / output, and defective discharge part for discharging defective parts.

After the user installs the vision system of the present invention in the field, all the operations such as transfer, shooting, image analysis, determination of defect and discharge of defective products to the next camera can be done by simply inserting the parts to be sorted into the transfer conveyor entrance of the present invention. It is a vision system that can be used only by simple preparation work as the judgment and judgment are done internally independently.

In FIG. 1, when a user supplies a part to the entrance of the conveyor, the built-in conveyor loads the part and transfers the part to the place where the camera is installed at a constant speed. In this case, the camera used is a line scan type camera. In addition, the rotational speed sensor such as encoder is attached to the conveyor drive roller so that the shooting speed of the camera can be linked to the speed of the conveyor. This ensures a consistent image shape even when the conveyor speed changes.

As shown in FIG. 2, the conveyor for transporting parts is inclined about 15 degrees to one side to maintain a constant distance between the camera and the parts and to keep the shape of the image taken. Let's pass by.

When the part enters the shooting tunnel, the inside of the tunnel ensures sufficient illumination so that the shooting can be done in an optimal state, while indirect lighting is mainly used to avoid distortion of the image due to reflected light when shooting. At this time, the light source of the illumination can be used as indirect lighting by using a high brightness LED. In this case, the camera may be equipped with a line scan camera or a frame camera according to the shape of the object to be recognized and the image analysis method.

The image photographed by the camera is transmitted to the controller and compared with the data of the image which is input in advance, it is judged as good or bad.

At this time, if it is judged as a defective product, the discharge part is discharged by using compressed air at the discharge part located at the rear end of the conveyor.When the defective part is finished, the controller reaches the position where the discharge nozzle is located along the conveyor. By calculating the distance, the solenoid valve is used to blow compressed air at the exact time the part passes, and the defective part is discharged from the conveyor into the defective part container. At this time, if the part is big or long, blow out a lot of time, and in case of short and small part, blow out only a short time so that the power is not exhausted or blown too much so that other parts are not discharged together. At this time, the position and nozzle for discharging the defective parts can be made in several ways, and the position can be set according to the type of defect and discharged to a separate position. Not only can these parts be used to sort out defective parts, but they can also be categorized into shapes by type.

In addition, there are various methods of discharging, in addition to using the compressed air illustrated here, there are a variety of methods such as squeezing out, changing the course by blocking the oblique, and picking up, but such a method also includes packaging a vision system. It can be seen that the technical scope of the present invention is easy to install and stabilize the performance of the entire vision system.

In this system, parts can be transferred by using free fall or sliding motion using gravity, constant length conveying method using mechanism, and part feeder method using vibration without using belt conveyor. The packaging of a single vision system does not depart from the technical scope.

This design enables the user to install easily by single-bodying the vision system, which could not easily be applied to various and poor field conditions, into a single package. It is easy to install in the field and protected from external shocks, which enhances the durability of the entire vision system, prevents troubles, and makes it possible to apply the vision system easily and economically, thus enhancing the quality control system of the production site. That is an effective design.

Claims (6)

In the vision system part sorter having an image acquisition device part consisting of a camera and a lighting device, a controller, a part transfer part for transferring parts, and a part discharge part for discharging good or defective parts, And the image pickup device, the component transfer unit, and the component discharge unit are integrated into one package. The method of claim 1, Part selector, characterized in that to give a constant inclination to the conveyor for transporting parts so that the parts are always attached to one wall and tilted to a certain position. The method of claim 1, Part selector, characterized in that for ejecting the defective parts by blowing the corresponding parts by using the compressed air on the parts transfer unit. The method of claim 1, A part sorter characterized by a structure in which a part photographing part is covered in a tunnel type and a lighting system and a camera are installed inside the tunnel. The method of claim 1, Part selector characterized in that the camera is photographed in conjunction with the drive speed by attaching the rotational speed detection device to the drive shaft of the parts transfer conveyor. The method of claim 1, Component transfer conveyor is a part selector characterized by a structure with a proper groove to prevent the component from shaking.