• Title/Summary/Keyword: Inspection Program

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A Mixed 0-1 Linear Program for the Inspection Location Problem

  • Yum, Bong-Jin
    • Journal of Korean Institute of Industrial Engineers
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    • v.10 no.1
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    • pp.11-16
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    • 1984
  • An economic model is developed for determining optimal locations of screening inspection stations in a multistage production system. The effect of screening inspection on the production rate is explicitly considered, and a fixed cost for maintaining an inspection station is assumed. The product is allowed to have multiple defects, each of which may be inspected at any inspection station after the defect-generating operation. The problem is formulated as a mixed 0-1 linear program which offers the advantage of versatility in handling various system constraints.

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A Study on Algorithm for Inspection of Automobile's plastic part locking lever (자동차 플라스틱 부품 락킹레버 검사를 위한 알고리즘 연구)

  • Jang, Bong-Choon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.5
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    • pp.1558-1563
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    • 2010
  • This paper describes a study on algorithm for the development of machine vision system as well as the inspection of automobile's plastic part locking lever to replace a human worker's eye inspection. Before developing the machine vision system based on the PC, the purpose of this research is to develop the algorithm to decide whether a product is a good/bad one in real time inspection. NI-LabVIEW software is used in the inspection method and an inspection program is developed using LabVIEW Vision image functions. The inspection program was built and validated to help the system operator set up the inspection area and change the criteria number in the program.

Development of Implemental Procedure for K-Risk Based Inspection (한국형 위험기반검사(K-RBI)의 절차 개발)

  • Lee, Hern-Chang;Shin, Pyong-Sik;Lim, Dae-Sik;Kim, Tae-Ok
    • Journal of the Korean Society of Safety
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    • v.21 no.3 s.75
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    • pp.31-37
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    • 2006
  • To apply easily the K-RBI program in domestic industries, an implemental procedure for K-RBI program was prepared. The K-RBI program had been developed, based on API-581 BRD. Therefore, through the usage of the developed K-RBI program and the implemental procedure, industries would have a benefit from reduced costs by modifying a frequency of an inspection efficiently. Also, the reliability of facilities would be maximized through improvement of an inspection method for facilities, considering its risk.

Development of Aging Management System for the Concrete Structure (원전 콘크리트 구조물의 열화관리시스템 개발)

  • 조명석;방기성;송영철
    • Proceedings of the Korea Concrete Institute Conference
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    • 1996.10a
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    • pp.546-550
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    • 1996
  • The personal-computer software program named SAMS(Structural Aging Management System) was developed for the concrete structure of NPP(Nuclear Power Plant). SAMS is constituted of three part, detabase system containing various inspection data, operation program for standard input/output of the inspection data, and application program for efficient operation of database system. Using the SAMS, the field engineers can easily acquire the information about the various inspection data, repair and accidental histories of NPP structures. SAMS will contribute to the effcient maintenance of NPP structures.

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Automatic Safety Inspection Technique for Ammunition Fuzes using Radiographic Images (방사선 영상을 이용한 탄약신관 안전상태 자동인식기술 개발)

  • An, Ji Yeon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.18 no.3
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    • pp.283-292
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    • 2015
  • This paper presents the development of the automatic safety inspection technique for the ammunition fuzes using radiography images. The technique inspects 49-ammunition fuze by detecting the X-ray or neutron radiographic images to check whether the fuze is unintendedly armed or/and some major assembled parts are at right place. To execute the program, we loads the image(s) for under test. After reading images, the program conducts a series of pre-image processing, and then starts inspecting input images by using the detection algorithms which are designed distinctively for each fuze. After completing the detection process, the program displays the final result of the fuze status: "safety or danger." Through this program, we can cut off the fuzes which have any doubt about safety, and can only provide absolutely safe fuzes, compared with the current naked eye inspection method.

Development of Image Processing Program to Inspect Concrete Bridges (콘크리트 교량 외관조사용 이미지 처리 프로그램 개발)

  • Lee, Byeong-Ju;Shin, Jae-In;Park, Chang-Ho
    • Proceedings of the Korea Concrete Institute Conference
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    • 2008.04a
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    • pp.189-192
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    • 2008
  • Generally, the inspection is hard work and needs a lot of time. So, this work contains subjectivity of inspector owing to carry out the visual evaluations through naked eye. Thus, the result of inspection is not objective and reliable. The purpose of this study is to develop new inspection technique to solve above problems and to provide convenient inspection work. We make a new inspection system using digital image processing technology. This program can stitch each image and detect cracks of surface of concrete bridge. Also, It can extract an investigation drawing from the picture. Also, this program is a kind of management tools designed to have some functions such as converting the image data obtained from cameras to Data-Base format, searching and storing the data. At first, we try to make a automatic extracting program. But, changed by semiautomatic method because of various problems. Through field experiments, the application of this inspection system with specialty software has proven to be much faster, safer, and reliable than the inspections carried out by the naked eyes in managing safety of the bridges. The new inspection method may be able to make the inspection of bridge more efficient and reliable.

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Design for a Defective Product Inspection Device for the Curved Glass used in Smart-phones (스마트폰 곡면 강화유리의 불량품 검사장치 설계)

  • Kim, Han-Sol;Lee, Kyung-Jun;Jung, Dong-Yean;Lee, Yeon-Hyeong;Park, Jea-Hyun;Kim, Gab-Soon
    • Journal of Institute of Control, Robotics and Systems
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    • v.21 no.8
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    • pp.794-800
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    • 2015
  • This paper describes the design for a defective product inspection device for the curved glass used in smart-phone. Cameras are used as inspection devices to find cracks in LCDs (Liquid Crystal Displays), PDPs (Plasma Display Panels), etc. The devices used to inspect the curved glass used in smart-phone consist of a camera, two back-light apparatus, an inspection apparatus main body, and an image processing program. Camera image calibration was performed to smooth an image taken with the camera, and as a result, the average error was less than 0.12 pixels. And the image of a smart-phone's curved glass taken with the camera was processed using the produced program. As a result, the program could correctly extract the cracks on the curved glass. Thus, it is thought that the designed inspection device can successful detect cracks in curved tempered glass.

Ball Grid Array Solder Void Inspection Using Mask R-CNN

  • Kim, Seung Cheol;Jeon, Ho Jeong;Hong, Sang Jeen
    • Journal of the Semiconductor & Display Technology
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    • v.20 no.2
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    • pp.126-130
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    • 2021
  • The ball grid array is one of the packaging methods that used in high density printed circuit board. Solder void defects caused by voids in the solder ball during the BGA process do not directly affect the reliability of the product, but it may accelerate the aging of the device on the PCB layer or interface surface depending on its size or location. Void inspection is important because it is related in yields with products. The most important process in the optical inspection of solder void is the segmentation process of solder and void. However, there are several segmentation algorithms for the vision inspection, it is impossible to inspect all of images ideally. When X-Ray images with poor contrast and high level of noise become difficult to perform image processing for vision inspection in terms of software programming. This paper suggests the solution to deal with the suggested problem by means of using Mask R-CNN instead of digital image processing algorithm. Mask R-CNN model can be trained with images pre-processed to increase contrast or alleviate noises. With this process, it provides more efficient system about complex object segmentation than conventional system.

The Implementation of Risk-Based Inspection for the Refinery Plant

  • Choi, Song-Chun
    • Corrosion Science and Technology
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    • v.11 no.2
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    • pp.43-47
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    • 2012
  • Recently, regulatory bodies quite often encourage to adopt risk-based inspection (RBI) and management programs because they can enhance safety simultaneously with deregulation in Korea. RBI is an integrated methodology that factors risk into inspection and maintenance decision making. This paper describes an example of how to use known risk assessment codes (API 580, API 581 BRD) to address such safety analysis requirements for risk management in the refining industry. Specifically, this paper reports the methodology and the results of implementation to the Crude Distillation Unit(CDU) plant of refinery units using the $KGS-RBI^{TM}$ program, developed by the Korea Gas Safety Corporation in reference of API Codes and ASME PC (Post Construction) with a suitable consideration of Korean situation. The results of the risk and reliability assessment using $KGS-RBI^{TM}$ program are useful in determining whether the detected defects are tolerable or required to be repaired. The subsequent decisions are to manage the future inspection, repair and maintenance planning in the risk reduction control.

Development of Port Inspection Manual and Study on the Maintenance DB System (잔교식 항만 구조물 유지관리 지침 개발 및 전산화 연구)

  • 이성우;신수봉;정만화
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 1998.04a
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    • pp.229-236
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    • 1998
  • Port structures are one of the important infrastructure of the nation. To ensure safety and extend lifetime of the existing port structures, it is necessary to develop proper maintenance program. In this study, port inspection manual for pier type structure are developed. The flow of inspection program is designed and defect type for each component of wharf is classified. Also systematic method of rating and evaluation is developed together with conceptual design of port maintenance data base system.

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