• Title/Summary/Keyword: Non-contact Inspection System

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A study on application of RFID systems for tracking of C-Hook in the wire rods process (선재 공정에서 C-Hook 트래킹을 위한 RFID 시스템 적용에 대한 연구)

  • Kwon, Young-Sin;Lee, Chang-Woo;Ban, Sung-Jun;Cho, Hyung-Woo;Kim, Sang-Woo
    • Proceedings of the KIEE Conference
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    • 2006.10c
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    • pp.413-415
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    • 2006
  • Wire rods are carried by C-Hooks and are tracked by bringing the inspection sensors into contact with steel bars on the C-Hooks. However, the conventional system using mechanical equipment is not reliable due to aging, wearing and bending of steel bars. To overcome these problems, a non-contact type identification system is required. This paper introduces the radio frequency identification(RFID) technology which is one of the most popular non-contact identification methods, and evaluates its performance in the real environment of POSCO. Specifically, we use tags which are designed for operating on high temperature and allowing easy attaching and detaching on the C-Hook. A new monitoring program is developed for reacting upon the conventional system and showing the results of reading of reading tags.

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A Study on the Measurement of Foreign Material in Dissimilar Metal Contact Using Pulse Laser and Confocal Fabry-Perot Interferometer (펄스 레이저와 CFPI를 이용한 이종금속 접촉부의 이물질 측정에 관한 연구)

  • Hong, Kyung-Min;Kang, Young-June;Park, Nak-Kyu
    • Journal of the Korean Society for Nondestructive Testing
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    • v.33 no.2
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    • pp.160-164
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    • 2013
  • A laser ultrasonic inspection system is a non-contact inspection device which generates and measures ultrasonics by using laser beam. A laser ultrasonic inspection system provides a high measurement resolution because the ultrasonic signal generated by a pulse laser beam has a wide-band spectrum and the ultrasonic signal is measured from a small focused spot of a measuring laser beam. In this study, galvanic corrosion phenomenon was measured by non-destructive and non-contact method using the laser. The case of mixed foreign material on the part of corrosion was assumed and laser ultrasonic experiment was conducted. Ultrasonic was generated by pulse laser from the back side of the specimen and ultrasonic signal was acquired from the same location of the front side using continuous wave laser and Confocal Fabry-Perot Interferometer(CFPI). The characteristic of the ultrasonic signal of exist foreign material part was analyzed and the location and size of foreign material was measured.

A Study on the Inner Defect Inspection for Semiconductor Package by ESPI (ESPI를 이용한 반도체 패키지 내부결함 검사에 관한 연구)

  • Jung, Seung-Tack;Kim, Koung-Suk;Yang, Seung-Pil;Jung, Hyun-Chul;Lee, You-Hwang
    • Proceedings of the KSME Conference
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    • 2003.11a
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    • pp.1442-1447
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    • 2003
  • Computer is a very powerful machine which is widely using for data processing, DB construction, peripheral device control, image processing etc. Consequently, many researches and developments have progressed for high performance processing unit, and other devices. Especially, the core units such as semiconductor parts are rapidly growing so that high-integration, high-performance, microminiat turization is possible. The packaging in the semiconductor industry is very important technique to de determine the performance of the system that the semiconductor is used. In this paper, the inspection of the inner defects such as delamination, void, crack, etc. in the semiconductor packages is studied. ESPI which is a non-contact, non-destructive, and full-field inspection method is used for the inner defect inspection and its results are compared with that of C-Scan method.

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Preliminary Study of the Measurement of Foreign Material in Galvanic Corrosion Using Laser Ultrasonic

  • Hong, Kyung Min;Kang, Young June;Park, Nak Kyu;Choi, In Young
    • Journal of the Optical Society of Korea
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    • v.17 no.4
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    • pp.323-327
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    • 2013
  • A laser ultrasonic inspection system has the advantage of nondestructive testing. It is a non-contact mode using a laser interferometer to measure the vertical displacement of the surface of a material caused by the propagation of ultrasonic signals with the remote ultrasonic generated by laser. After raising the ultrasonic signal with a broadband frequency range using a pulsed laser beam, the laser beam is focused to a small point to measure the ultrasonic signal because it provides an excellent measurement resolution. In this paper, foreign materials are measured by a non-destructive and non-contact method using the laser ultrasonic inspection system. Mixed foreign material on the corroded part is assumed and the laser ultrasonic experiment is conducted. An ultrasonic wave is generated by pulse laser from the back of the specimen and an ultrasonic signal is acquired from the same location of the front side using continuous wave laser and Confocal Fabry-Perot Interferometer (CFPI). The characteristic of the ultrasonic signal of existing foreign material is analyzed and the location and size of foreign material is measured.

Design of a non-contact type displacement measurement system based on optical triangulation method (광삼각법에 의한 비접촉식 변위측정계의 설계)

  • 이재윤;김승우
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.16 no.6
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    • pp.1030-1035
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    • 1992
  • This paper presents a non-contact type displacement sensor designed based on optical triangulation method. The optical principles of the sensor are described in detail with aids of paraxial geometric optics. A prototype sensor is designed and fabricated by using modern optoelectronic hardware. Its measuring performances are evaluated and discussed through a series of calibration processes.

A Study on Development and Application of Real Time Vision Algorithm for Inspection Process Automation (검사공정 자동화를 위한 실시간 비전알고리즘 개발 및 응용에 관한 연구)

  • Back, Seung-Hak;Hwang, Won-Jun;Shin, Haeng-Bong;Choi, Young-Sik;Park, Dae-Yeong
    • Journal of the Korean Society of Industry Convergence
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    • v.19 no.1
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    • pp.42-49
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    • 2016
  • This study proposes a non-contact inspective technology based robot vision system for Faulty Inspection of welding States and Parts Shape. The maine focus is real time implementation of the machining parts' automatic inspection by the robotic moving. For this purpose, the automatic test instrument inspects the precision components designator the vision system. pattern Recognition Technologies and Precision Components for vision inspection technology and precision machining of precision parts including the status and appearance distinguish between good and bad. To perform a realization of a real-time automation integration system for the precision parts of manufacturing process, it is designed a robot vision system for the integrated system controller and verified the reliability through experiments. The main contents of this paper, the robot vision technology for noncontact inspection of precision components and machinery parts is useful technology for FA.

Research on Foundation Technology for Crack Inspection Automation Device with Effective Performance (효과적인 크랙 검사 자동화 장치를 위한 기반 기술 연구)

  • Choi, Goon-Ho
    • Journal of the Semiconductor & Display Technology
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    • v.18 no.4
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    • pp.143-148
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    • 2019
  • Numerous pipe lines can be found on various plant-based industrial sites. These pipelines should be periodically checked for defects. Most of these pipelines are internally inaccessible and difficult to visually inspect. Therefore, the inspection is being carried out with the help of non-contact inspection equipment such as ultrasonic flaw detection equipment. The use of ultrasonic flaw detection equipment can raise time and efficiency issues. In order to solve this problem, we will study the basic technology necessary for the development of automated inspection system equipped with ultrasonic measuring equipment and verify the validity through the fabrication of the demonstration device.

Non-contact mobile inspection system for tunnels: a review (터널의 비접촉 이동식 상태점검 장비: 리뷰)

  • Chulhee Lee;Donggyou Kim
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.25 no.3
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    • pp.245-259
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    • 2023
  • The purpose of this paper is to examine the most recent tunnel scanning systems to obtain insights for the development of non-contact mobile inspection system. Tunnel scanning systems are mostly being developed by adapting two main technologies, namely laser scanning and image scanning systems. Laser scanning system has the advantage of accurately recreating the geometric characteristics of tunnel linings from point cloud. On the other hand, image scanning system employs computer vision to effortlessly identify damage, such as fine cracks and leaks on the tunnel lining surface. The analysis suggests that image scanning system is more suitable for detecting damage on tunnel linings. A camera-based tunnel scanning system under development should include components such as lighting, data storage, power supply, and image-capturing controller synchronized with vehicle speed.

Development of Optical Probe to Inspect Micron Scale Part in Micro-Factory (Micro-Factory 공정간 마이크로 부품 검사 프로브 개발)

  • Kim Geehong;Lee D.W.
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2005.05a
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    • pp.424-428
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    • 2005
  • This paper shows a non-contact optical method to inspect micron scale parts which will be manufactured in micro-factory system. This inspection system should have some characteristics like a small size, flexibility, and high measuring speed. In the viewpoint of measuring capabilities, it also has resolution under micron scale with measuring range over millimeter scale. Two methods will be presented in this paper, one is Moire and the other is white-light scanning interferometry. Also some experimental results will be presented to show the possibilities of the proposed inspection system.

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Non-contacting OMM (On Machine Measurement) based on CAD Model (CAD 모델 기반 비접촉 기상 측정에 관한 연구)

  • 권세진;이정근;박정환;고태조;김선호
    • Journal of the Korean Society for Precision Engineering
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    • v.20 no.11
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    • pp.134-141
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    • 2003
  • An industrial product is designed and fabricated, followed by the inspection process in order to check whether it is dimensionally tolerable or not. The machining process produces a part such as a mold or die, in which the three-dimensional coordinate might be measured by a CMM (Coordinate Measuring Machine) for assessment of its dimension. It is not ignorable, however, that a CMM measurement requires a lot of operating time and cost, which has led to many studies on the OMM system. The OMM system can be categorized into contact and non-contact types, and each of which has its own strengths and weaknesses. Non-contacting types generally utilize structured lights, sounds or magnetic fields. Though they show rather poor performance in positional accuracy, the measuring speed is faster than the contacting probes. This paper presents the development of an OMM system based on a non-contacting laser displacement sensing apparatus and CAD model. The system is composed of software modules of center-aligning and measuring, which has been operated and verified on a NC machining center on a shop floor.