KR20110011113A - The inspection machine of safty tongue for motor and inspecting method - Google Patents

Abstract

PURPOSE: An automatic inspecting device for a bearing sleeve vision outer tube of a vehicle and an inspecting method are provided to classify faults according to protruding, scratch and pinhole. CONSTITUTION: An automatic inspecting device for a bearing sleeve vision outer tube of a vehicle comprises a tongue alignment part(1), an image capture zone(2), a camera(3), a camera housing(4), and a conveyor(5). The tongue alignment part comprises a guide installed at both sides of belt to control the width. The image capture zone captures image with the illumination flowing in a check field. The camera inspects the burr of tongue. The conveyor is installed in an inspection domain.

Description

Vehicle Safety Belt Tongue Vision Automatic Inspection Equipment and Inspection Method {The Inspection machine of Safty Tongue for Motor and inspecting method}

The improvement of precision and quality of production parts produced in the automobile field has a great influence on the automobile and the whole industry, and therefore the importance of the quality of these parts necessary for the manufacturing production of the automobile industry is increasing day by day. The present invention is an automatic inspection equipment that accurately and quickly inspects, identifies, and classifies the defects of safety belts that can control human life among automobile parts, and visually inspects the defects of products in the process of producing existing mechanical parts. The way you do it or through a microscope is done by using a robotic system, or automatic inspection equipment. In addition, the production line automation is built so that more accurate and faster inspections can contribute significantly to productivity. The technical field is a combination of robot technology, automation technology, image processing technology, and optical technology.

[Document 1] D.A. Belsley, E. kuh, and R.E. Welsch, Regression Diagnosticx, John

        Wiley & Sons, 1980

[2] Helett-Packard Development company, "understanding pixel defects in

        TFT-LCD flat panel monitors, "Hewlett-Packard. 2004

[Image 3] Image processing, Craig A.Lindly

[Document 4] FARA MVE-02 Hardware

[5] Laser Focus World, A PennWell Publication

[6] The design world of motor's parts

[7] Rfael. C conzalez and Richard E. Woods, Digital Image

        Processingrentic Hall 2001.

[8] Simon Haykim, Adaptive Filter Wedge Bridge Prence Hall 2002.

9 Tannas. L> E.Jr, "Evolution of flat-panel display," proceedings of

 the IEEE, vol82, no.4, pp 499-509, Apr. 1994

The inspection item is Tongue bur, so the resolution is 12um / Pxil, and the camera tilt is 30 ° so that the Bur can be detected accurately, the slope of the bur is designed to be almost 0 °, the minimum detection size is 50um and the detection error is +, -It is composed of 15 um to prevent the safety belt toungue from being separated by the weak impact of the car, and also designed to allow the occupant to easily detach the toungue even in the event of a fire due to an accident. The present invention is a system for screening the bur of Tongue for automobile seat belts and screening defective products according to the presence or absence of stamping, scratching, pinhole, and protusion as additional functions. This automatic inspection equipment was invented based on the following standard. First of all, the system was composed as follows for the inspection standard, inspection condition and optimal inspection. Firstly, the Tongue for the seatbelt to be inspected used B018 type, and the Tongue's size was 92mmL x 64mmW x 10mmH press workpiece.The inspection condition was tact time: 1.0 sec / 1pc, Light: Back-light for Bur, Front-light for Engrave. and Scratch. Secondly, the test capability was designed as bur:> 150 μm, Engrave:> presence, and consisted of stamping, scratch, pin hole etc:> 300 μm. Third, the inspection system part (optical, lighting, image processing, etc.) is composed as follows. The camera takes up an area of 80mm (W) x 100mm (L) and WD is 220mm (H) (± 50), and it is 1024 pixel x 768 pixel which is optimal for inspecting the camera and lens in the vision area. In addition, the test conditions consisted of Tact time: 45 ~ 50 / min, so that a person can inspect at a speed more than 5 times compared to visual inspection. The optimal high brightness LED lighting was manufactured and applied. The equipment standard was designed by the operator considering the optimal space utilization and efficiency in the process.

This automatic inspection equipment consists of (1) Bur inspection unit 1 unit, (2) Engrave, Scratch inspection unit (front) 1 unit (3) Scratch inspection unit (rear) 1 unit, (4) System control unit 1 unit, (5) Personal Computer 2 sets, (6) Logistic System 1 unit, (7) image processing software 1 unit. Also, the temporary part is composed as follows.

1. Bur inspection department

(1) Area scan CCD camera, 1K ---------- 1 set

(2) magnification lens ----------------- 1 set

(3) back light ------------------------ 1 unit

(4) frame grabber board --------------- 1 set

(5) fixtures for camera and light -------- 1 unit

2. Engrave, Scratch Inspection Part (Front)

(1) Area scan CCD camera, 1K ---------- 1 set

(2) magnification lens ----------------- 1 set

(3) light ----------------------------- 1 unit

(4) frame grabber board --------------- 1 set

(5) fixtures for camera and light -------- 1 unit

3. Scratch, Pin hole, Prutusion, Dent etc Inspection part (rear)

(1) Area scan CCD camera, 1K ---------- 1 set

(2) magnification lens ----------------- 1 set

(3) light ----------------------------- 1 unit

(4) frame grabber board (shared with front inspection)

4. System control unit

(1) MCU Part

(2) Control from PC with RS-232C serial communication

(3) Camera Trigger Signal Generation

(4) Deliver Image to PC

(5) Integrate vision system, logistic system, sensor, etc. in PC

    Control

5. Personal Computer

(1) PC for bur inspection ----------- 1 set

   master PC

(2) PC for engrave, scratch --------- 1 set

6.Logistic System

(1) frame -------------------------- 1 unit

(2) aligning unit --------------------- 1 unit

(3) bur detection conveyor --------------- 1 unit

(4) Carving for engraving, scratch (front) --- 1 unit

(5) Scratch (rear) detection conveyor -------- 1 unit

(6) bur defective product separation device ------------- 1

(7) other defective products separation device ------------ 1

(8) sensors ------------------------- 1 unit

7. Image processing software

(1) image processing algorithm (bur)----- 1 unit

(2) image processing algorithm (inscription, Pin hole, Prutusion, Scratch)-1 unit

(3) GUI ----------------- 1 unit

The object to be inspected is Tongue (B018) for seat belts. The size of the test subject is 92mmL x 64mmW x 10mmH press work. Inspection capacity is bur:> 50 μm, Engrave:> Presence, Imprint and Scratch, Pinhole, Prostusion:> 100 μm, Test conditions are tact time: min 0.5 sec / 1pc, Light: Back-light for Bur Invented as Front-light for Engrave and Scratch, Pinching and Scratch, Pinhole, Prostusion. The inspection equipment is largely (1) Bur inspection unit 1 unit, (2) Engrave, Scratch inspection unit (front) 1 unit (3) Scratch inspection unit (rear) 1 unit, (4) System control unit 1 unit, (5) Personal Computer 2 sets, (6) Logistic System 1 unit and (7) image processing software1 unit are composed of seven steps. Each process is designed and optimized to be optimized for processing process and production site to require minimal process control through automatic control.

It is designed to maximize the quality of the product through accurate and reliable inspection results. The system consists of machine vision system, inspection method, inspection algorithm and system to classify defects. The hardware system is largely composed of four modules: an instrument unit, an optical unit, a control panel, and inspection software. The mechanism part consists of a transport mechanism for smoothly transporting the vehicle seat belt tongue and an accurate inspection system, an optical mechanism for an optimal inspection environment, and a housing for lighting control, and the optical part includes a camera and a lens for obtaining an image of the part. , Consists of special lighting and optical filters. The control panel is a PLC and other electrical and electronic systems that provide outputs to the motion controller, proximity sensor, lighting controller, host computer and peripheral equipment for driving inspection programs, and reports on defective parts. consist of. Inspection items are Bur, Scratch, Pin hole, dent, protrusion, and foreign material. The inspection software runs on the Windows XP OS of the main computer, and plays a key role in controlling peripheral devices, performing inspections, and storing images of inspection items and parameters as well as. Each process is configured to be optimized for the production site through the minimum of automatic control.

 This inspection equipment is mainly designed to inspect Bur of Tongue for seat belts, and it is a system that sorts out defective products according to stamping, stamping, scratch, pinhole, and presence of prosthesis as an additional function. The present invention is a device that automatically judges and classifies defects using camera, lighting, S / W, apparatus, and classification system for the first time, which was conventionally performed by visual inspection. As a result, the criteria for judging defects are different for each person, and in the case of Bur, it is almost impossible to measure the angle of the press with the naked eye. It is a system designed to improve and increase productivity five times. The inspection equipment consists of seven stages: (1) Bur inspection unit 1 unit, (2) Engrave, Scratch inspection unit (front) 1 unit (3) Scratch inspection unit (rear) 1 unit, (4) System control unit 1, (5) Personal Computer 2 It consists of sets, (6) Logistic System 1 unit, (7) image processing software1 unit, and each process is designed to be optimized for processing process and production site to minimize the process control through automatic control. It is designed to maximize the quality of the product through the inspection results that can be made.

 No. 1 in FIG. 1 is a portion that Tongue aligns to inspect the upper surface (upper surface). To ensure proper alignment, the guides are designed on both sides of the belt to adjust the width so that tongues on both sides of the conveyor belt can pass through the conveyor smoothly. No.2 is the area where the tongue that enters the inspection zone can capture the image by the lighting. The lighting is turned on by the sensor and the camera stands by for scanning. No.3 is a camera for inspecting Bur. No. 4 is a camera housing. No. 5 is a conveyor in the inspection part area. No.6 is the bur out part and it is the Tongue area after the Bur test. No. 7 in FIG. 2 is a portion that Tongue aligns to inspect the upper surface (upper surface). To ensure proper alignment, the guides are designed on both sides of the belt to adjust the width so that tongues on both sides of the conveyor belt can pass through the Kenvey smoothly. No.8 is the place where solenoid pushes out tongue when it is bad by Bur test. Next, the tongue that enters the inspection zone can capture the image by illumination. The illumination is turned on by No.9 sensor and stand-by so that the camera can scan. No.10 is a camera to inspect the scratch, pin-hole, etc on the top of the tongue. No.12 is the conveyor of the inspection part area. No.11 is the outgue part and the Tongue area after the inspection of the top foreign matter. [No. 1] of Fig. 3 is the Tongue on the Kenbear after the upper part inspection. 2, No. 5 is the place where the tongue is turned upside down in order to inspect the back side by flipping the tongue that has been inspected on the top side. Nos. 6 and 7 are the parts that Tongue aligns to inspect the back side (top side). To ensure proper alignment, the guides are designed on both sides of the belt to adjust the width so that tongues on both sides of the conveyor belt can pass through the Kenvey smoothly. No.7 is where the solenoid pushes out the tongue to sort out if it is bad. Next, the tongue entering the inspection zone is the area where the image can be captured by the illumination. The illumination is turned on by the No. 8 sensor and the stand-by area allows the camera to scan. No.4 is a camera to inspect the scratch, pin-hole, etc on the back of the tongue. No.11 is the conveyor in the inspection area. Nos. 8 and 9 are the out area and the Tongue area after the back side foreign material inspection. No. 2 in FIG. 4 is a portion that Tongue aligns to inspect the upper surface (upper surface). To ensure proper alignment, the guides are designed on both sides of the belt to adjust the width so that the tongues on both sides of the conveyor belt can pass through the kenvey smoothly. No.1, No.9 and No.11 transfer the tongue to the stepping motor, No3 and No12 are the tongue transfer belt.No.2 is the area where the tongue in the inspection zone can capture the image by illumination. It is a stand-by area where the camera can scan while lighting is turned on by the sensor. No.7 is a camera for inspecting Bur. Nos. 6 and 10 are LED lighting lights, Nos. 4 and 5 are conveyors in the inspection area. No. 8 is the bur out portion and the togue area after the bur inspection. No. 1 in Fig. 5 is the tongue. This is the part to align to inspect the upper (upper) part. In order to ensure proper alignment, the guides are designed on both sides of the belt to adjust the width so that the tongues on both sides of the conveyor belt can pass through the Kenvey smoothly. No. 2 is the place where solenoid pushes out the tongue when the Bur test result is bad. Next, the tongue that enters the inspection zone can capture the image by illumination. It is the zone where the camera can scan while the illumination is turned on by No.3 sensor. No.5 is a camera for inspecting scratches, pin-holes, etc. on the top of Tongue, No.6 is LED lighting. No.4 is a conveyor in the inspection area. The later Tongue area. No. 7 in Fig. 5 and No. 3 in Fig. 6 are Tongues on the Kenbear after finishing the top inspection, and Fig. 6 No. 4, No. 5 and No. 11 are the top surface inspection. This is where you mechanically upset the tongue to turn the finished tongue over and inspect the back. No. 8 is the part that Tongue arranges to inspect the back side (top side). To ensure proper alignment, the guides are designed on both sides of the belt to adjust the width so that the tongues on both sides of the conveyor belt can pass through the Kenvey smoothly. No.14 is the place where solenoid pushes tongue out if it is bad after inspection on back side. Next, the tongue that enters the inspection zone can capture the image by illumination. The illumination is turned on by No.9 sensor and stand-by so that the camera can scan. No.13 is a camera for inspecting scratches, pin-holes, etc. on the back of the tongue, and No.12 is LED lighting. No.1, 6, and 16 are conveyors in the inspection area. No.15 is the out part and is the Tongue area after the inspection of the foreign material on the back side. Equipment composition consists of Tongue's supply part, alignment part, Bur inspection part, Engrave, Scratch inspection part (front), Scratch inspection part (rear), positive part determination, both parts separation part, and external case SS400 powder coating, roller driving step motor and controller, material supply Rate 60PPM (± 10), cover consisted of frame aluminum profile. Tongue automatic inspection equipment for seat belts for automobiles of the present invention is a system that sorts out defective products according to the presence or absence of imprinting, stamping, scratch, pinhole, and projection as an additional function. The results are reported to the user and the configuration, inspection methods and specifications of the machine vision system to isolate the rejects. The system was developed with optics, a control panel and four modules and instrumentation software. The optical part was developed with cameras and lenses, special lighting and optical filters. The control part was developed as a PLC and other electrical and electronic systems that provide output to the host computer and peripheral equipment for driving motion control, proximity sensors, lighting controls, inspection programs and reports on defective parts. The parameter setting function is composed as follows. 1) Model setting:-Tongue size (width × length), unit mm,-Bur, Scratch, Pin Hole Size, unit um-Inspection area setting 2) Detection degree selection function (selection by item, 3 steps or less):- It is possible to select the Bur, Scratch, Pin Hole, etc size to be detected (eg, high precision, precision, normal). 3) Bur and Scratch, Pin Hole, etc. Position and enlarge image before processing. -When the user confirms with the track ball, the display-Image window size and position is set in the designated window before processing.

1 is a view of the inlet and Bur inspection of the Tongue.

Figure 2 is a stamp recognition and scratch inspection unit.

3 is a diagram for inspecting the Scratch, Pin hole, etc. (back side)

FIG. 4 is a front view of FIG. 1. FIG.

FIG. 5 is a front view of FIG. 2.

FIG. 6 is a front view of FIG. 3.

7 is a flow chart for the inspection algorithm.

FIG. 8 is a three-dimensional front view of FIGS. 1 and 2.

FIG. 9 is a stereoscopic rear view of FIGS. 1 and 2.

10 is an N / G image when using the transmission light.

Fig. 11 shows the algorithm processing contents at the time of penetration inspection.

12 shows the contents of the algorithm during the reflection test.

FIG. 13 is a transmission illumination algorithm.

14 is a three-dimensional view of the equipment and the description of the parts.

Claims (16)

1, Tongue entrance and Bur inspection unit (optical, lighting, mechanism) design and principle 2, Scratch, Pin hole, etc. Inspection part (optical, lighting, mechanism) design and principle [Figure 3], Scratch, Pin hole inspection part (optical, lighting, mechanism) drawings (back) design and principle [Representative] Overall System Layout, Design Inspection algorithm Three-dimensional drawing Stereoscopic drawing rear view System control unit   GUI configuration Logistic System Automobile seat belt tongue vision automatic inspection equipment and inspection method  [Fig 10] N / G treatment content and inspection method during transmission lighting  Fig. 11 Image processing algorithm in transmission illumination  [Fig. 12] Reflective lighting algorithm  Fig. 13 Transmission lighting algorithm  14 is a three-dimensional drawing and the name of each part, parts drawing

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