• Title/Summary/Keyword: Verification Inspection

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Development of Probability Based Defect Verification Algorithm for Automatic Visual Inspection (자동외관검사를 위한 확률기반 불량 확인 알고리즘 개발)

  • Kim, Youngheub;Ryu, Sun-Joong
    • Journal of the Semiconductor & Display Technology
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    • v.16 no.2
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    • pp.1-8
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    • 2017
  • The visual inspection of electronic parts consists of two steps: automatic visual inspection and verification inspection. In the stage of a verification inspection, the human inspector sequentially inspects all the areas which detected in the automatic inspection. In this study, we propose an algorithm to determine the order of verification inspection by Bayes inference well known in the field of machine learning. This is a method of prioritizing a region estimated to have a high probability of defect using experience data of past inspection. This algorithm was applied to the visual inspection of ultraviolet filters to verify its effectiveness. As a result of the comparison experiment, it was confirmed that the verification inspection can be completed 30% of the conventional method by adapting proposed algorithm.

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A Learning-based Visual Inspection System for Part Verification in a Panorama Sunroof Assembly Line using the SVM Algorithm (SVM 학습 알고리즘을 이용한 자동차 썬루프의 부품 유무 비전검사 시스템)

  • Kim, Giseok;Lee, Saac;Cho, Jae-Soo
    • Journal of Institute of Control, Robotics and Systems
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    • v.19 no.12
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    • pp.1099-1104
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    • 2013
  • This paper presents a learning-based visual inspection method that addresses the need for an improved adaptability of a visual inspection system for parts verification in panorama sunroof assembly lines. It is essential to ensure that the many parts required (bolts and nuts, etc.) are properly installed in the PLC sunroof manufacturing process. Instead of human inspectors, a visual inspection system can automatically perform parts verification tasks to assure that parts are properly installed while rejecting any that are improperly assembled. The proposed visual inspection method is able to adapt to changing inspection tasks and environmental conditions through an efficient learning process. The proposed system consists of two major modules: learning mode and test mode. The SVM (Support Vector Machine) learning algorithm is employed to implement part learning and verification. The proposed method is very robust for changing environmental conditions, and various experimental results show the effectiveness of the proposed method.

Legal Aspects on the Procedures and Settlement of the Disputes arising from the WTO Preshipment Inspection (WTO 선적전검사제도에 따른 실태와 분쟁조정의 해결에 관한 고찰)

  • Seo, Jeong-Il
    • Journal of Arbitration Studies
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    • v.8 no.1
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    • pp.293-322
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    • 1998
  • General Administrative Procedures of the Preshipment Inspection 1. Initial notification Preshipment Inspection is initiated by Agency when it receives notice either from the importing country, or the seller, that an export needs to be imspected 1.1 Notice from the importing country 1.2 Notice from the seller 2. Preliminary price verification After receipt of initial notification, Agency undertakes, Where possible, a preliminary price verification, based upon the Inspection Order and other contractual documents received. 3. Customs classification When required by the Government of the importing country. Agency forms an opinion of the Customs Classification Code based upon the Customs Tariff Book and Rules of Classification of the country of importation. The Customs Classification Code determines the tariff rate on the basis of which the importer will be required to pay import duties. 4. Import eligibility 5. Arrangements for physical inspection 5.1 Inspection request from seller 5.2 Place of inspection 5.3 Date of inspection 5.4 Physical inspection procedures 6. Physical inspection results When the physical inspection is completed, the inspector submits his report to the Agency office and the result of inspection will be communicated to the seller and, where applicable, the place of inspection. The result will state: satisfactory or conditional of unsatisfactory. The seller is welcome to present his views in writting to Agency in the event there is any query regarding the issuance of a conditional of unsatisfactory inspection result. 6.1 Satisfactory 6.2 Conditional 6.3 Unsatisfactory 7. Shipment of the goods The seller is advised to check with Agency prior to shipment if the physical inspection result has not been received or there are any doubts concerning whether a Clean Report of Findings will be issued. 8. Final price verification and classification Based on the results of physical inspection and appropriate final documents, Agency finalises the price verification and the Agency opinion of Customs classification code. When the preliminary price verification has not resulted in any unresolved questions and the inspection result and other documents received are consistent with the preliminary documentation, Agency will not normally require any additional information. The main exception would be if the terms of sale require reference to prices at the date of shipment. 9. The Report of Findings 9.1 Types of Reports of Findings - Clean Reports of Findings(CRF) The Agency will issue a Clean Reports of Findings(CRF), or equivalent document, normally within two working days after receipt of the necessary correct final documents and a satisfactory result in all aspects of the inspection. - Discrepancy Report.

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Multi-product Lot Quantity Verification: A Weighing Inspection Approach (다제품 로트 수량 확인법 : 무게 검사 방법)

  • Shin, Wan-Seon
    • Journal of Korean Institute of Industrial Engineers
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    • v.19 no.4
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    • pp.115-123
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    • 1993
  • This paper presents an alternative inspection method for counting items of a lot(or kit) in production lines or distribution centers. In this inspection, lots are weighed instead of counting all items of the lots in order to reduce the effort required for the 100% manual counting inspection. Inspection errors of this inspection procedure are analyzed and the impact of the variability of item weights on inspection errors are investigated. Two approaches, the cost assessment approach and the bicriterion decision making approach, are presented for the implementation of this inspection procedure.

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A Study on the Problem of Tester for the Field Inspection of the Photoelectric Smoke Detector (광전식연기감지기 현장점검기기의 문제점에 관한 연구)

  • Kim, Shi-Kuk;Yuk, Hyun-Dai;Yang, Seung-Hyun;Jee, Seung-Wook;Lee, Chun-Ha
    • Fire Science and Engineering
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    • v.23 no.4
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    • pp.137-144
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    • 2009
  • This paper was studied on the problem of field inspection tester of the photoelectric type smoke detector. The experiment objects were chosen 3 type's testers such as A type (incense), B type (dimethylpolysiloxane), C type (mixtures of hydrocarbon) which were used for performance checking of the photoelectric type smoke detector for the fire protection. The experimental methods were used reliability verification experiment, performance verification experiment and performance change of fire detector by smoke component. It was confirmed through the experiment that the testers had problems of smoke concentration condition and wind velocity condition and smoke component. Consequently, this paper verified that the field inspection testers of the photoelectric type smoke detector had problems in the inspection of fire protection.

A Practical Effectiveness Analysis on Alert Verification Method Based on Vulnerability Inspection (취약점 점검을 활용한 보안이벤트 검증 방법의 실증적 효과분석)

  • Chun, Sung-Taek;Lee, Youn-Su;Kim, Seok-Hun;Kim, Kyu-Il;Seo, Chang-Ho
    • The Journal of the Korea Contents Association
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    • v.14 no.11
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    • pp.39-49
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    • 2014
  • Cyber threats on the Internet are tremendously increasing and their techniques are also evolving constantly. Intrusion Detection System (IDS) is one of the powerful solutions for detecting and analyzing the cyber attacks in realtime. Most organizations deploy it into their networks and operate it for security monitoring and response service. However, IDS has a fatal problem in that it raises a large number of alerts and most of them are false positives. In order to cope with this problem, many approaches have been proposed for the purpose of automatically identifying whether the IDS alerts are caused by real attacks or not. In this paper, we present an alert verification method based on correlation analysis between vulnerability inspection results for real systems that should be protected and the IDS alerts. In addition, we carry out practical experiments to demonstrate the effectiveness of the proposed verification method using two types of real data, i.e., the IDS alerts and the vulnerability inspection results.

Development of the S/G TSP Clogging Image Analysis Algorithm (증기발생기 유로홈막힘 사진판독 알고리즘 개발)

  • Cho, Nam Cheoul;Kim, Wang Bae;Moon, Chan Kook
    • Transactions of the Korean Society of Pressure Vessels and Piping
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    • v.7 no.3
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    • pp.8-14
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    • 2011
  • The clogging of the flow area at the tube support plates(TSPs), especially at the upper TSPs results in the water level oscillation of a steam generator during normal operation. A reduction of the TSP flow area causes to increase in pressure drop within the two-phase flow zone, which destabilizes the boiling flow through the tube bundle. This phenomenon was occasionally observed at a few domestic and foreign nuclear power plants. One of the methods for defining the flow area clogging is visual inspection, which is the most effective inspection method. The results of the visual inspection for TSPs' flow area are clogging images on TSPs' quartrefoil lobes. These images are complexly distorted due to lens aberration and external factors like the distance to a subject and angle etc. In this work, we developed the analysis algorithm for clogging image of the TSP flow area of steam generators. For this purpose, we designed an image verification device applicable to the camera employed in the field for visual inspection and then, we demonstrated the validity of image analysis algorithm by using this device and commercial autoCAD program.

An Automatic Inspection System Using Computer Vision (자동검사 시스템을 위한 컴퓨터 비젼의 연구)

  • Jang, Dong-Sik
    • IE interfaces
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    • v.4 no.2
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    • pp.43-51
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    • 1991
  • A line search method is developed to locate all the conerpoints of 2-dimensional polygon images for inspection purposes. This optimization-based method is used to approximate a 2-D curved object by a polygon. This scheme is also developed for inspection of objects in industrial environment. The inspection includes dimensional verification and pattern matching which compares a 2-D image of an object to a pattern image. The method proves to be computationally efficient and accurate for real time application.

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Cost-Effective and Active Security Verification Framework for Web Application Vulnerabilities (웹 애플리케이션 취약점 분석을 위한 비용 효과적인 능동 보안 검수 프레임워크)

  • Han, KyungHyun;Nguyen, Trong-Kha;Joe, Hun;Hwang, Seong Oun;Lim, Chaeho
    • KIPS Transactions on Computer and Communication Systems
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    • v.5 no.8
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    • pp.189-196
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    • 2016
  • Many companies have struggled to manage Web vulnerabilities and security incidents have also frequently happened. The current inspection methods are mainly based on the OWASP vulnerabilities. In practice, however, it is very difficult to cope with frequent changes of Web applications. In this paper, we first investigate the existing quantification of Web application vulnerabilities and verification process. Then we propose an improved inspection framework which is focused on removing essential and realistic vulnerabilities and active verification process.