A case study on inline defect diagnosis by applying e-beam inspection system

2016 ◽  
Author(s):  
Hao-Yu Chien ◽  
Chan-Hao Hsu ◽  
Yue-Ying Yen ◽  
Tzung-Hua Ying
Keyword(s):  
Inspection System ◽  
Defect Diagnosis

scholarly journals Optimization of a Kitting Line: A Case Study

Robotics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 70 ◽  
Author(s):  
Nicola Comand ◽  
Riccardo Minto ◽  
Giovanni Boschetti ◽  
Maurizio Faccio ◽  
Giulio Rosati
Keyword(s):  
Feeding Rate ◽  
The Other ◽  
Assembly System ◽  
Inspection System ◽  
Flexible Assembly ◽  
Vision Inspection ◽  
Other Hand ◽  
Time Required ◽  
The Cost

Assembly kitting lines typically deal with components that present different quantities in the final kit. Re-configurable feeders are not advisable for low quantity components since this solution leads to high inefficiency, due to the time required for retooling and for the feeding rate unbalance between the components. On the other hand a fully flexible feeder can increase the flexibility of the system at the cost of reducing the throughput. An assembly kitting problem was therefore addressed in different ways for low quantity components and high quantity components, studying the two different subsystems that compose a hybrid flexible assembly system. To optimize the re-configurable feeders, which supply the high quantity components, the opening sequence of a system composed by several hoppers was analyzed. We propose a solution which replaces the weighing device with a vision inspection system, showing its impact on the productivity of the line. A model coded into a Matlab script was developed to perform the optimization of the system and understand its behavior. Furthermore a fully flexible assembly system was developed in the laboratory in order to test the kitting of the low quantity components with the proposed subsystem. Finally the Overall Equipment Effectiveness of the line was calculated to evaluate the possible improvements obtained by the proposed solution.

Combined CCTV and leak detection technology for in-service water transmission mains

2012 ◽  
Vol 7 (4) ◽  
Author(s):  
Brian youngpyo Jo ◽  
Jon Boon
Keyword(s):  
Large Diameter ◽  
Leak Detection ◽  
Inspection System ◽  
The Past ◽  
Leak Location ◽  
Detection Technology ◽  
Service Water ◽  
Water Mains ◽  
Water Transmission

The reduction of Non-Revenue Water (NRW) through leakage detection is gaining ever higher significance for well-run water utilities. Tethered leak detection technology has become an essential tool for detecting the presence pinpointing the location as well as estimating the magnitude of leaks in large diameter (300 mm and above) water transmission mains of all pipe materials. For the past 7 years, inline CCTV inspection has also been available for in-service water mains using the Sahara® tethered video inspection system. These two technologies were used independently, which required two surveys for the same pipeline to deliver leak detection and CCTV inspection. This paper introduces Sahara AV, tethered combined leak detection and CCTV inspection technology designed to deliver multi functions such as leak detection, leak location and CCTV inspection through only one deployment for in-service water mains; recently wall thickness assessment has also been added to the list of technologies which can be mounted on the Sahara system. This paper introduces the Sahara AV system along with its specifications and explains the mechanism adopted to introduce the sensor into the live pipeline. The paper also discusses Sahara case study from Asia describing the benefits and return on investment experienced by clients that have engaged with programs involving Sahara technology.

Risk-based food inspection manual for the Caribbean

2019 ◽  
Keyword(s):  
Program Effectiveness ◽  
Inspection System ◽  
Food Control ◽  
Inspection Planning ◽  
Street Food ◽  
Food Inspection ◽  
The Caribbean ◽  
Guiding Principles ◽  
Risk Categorization

[Introduction] This manual contains guidance for risk-based inspections of food processing, preparation, retail and restaurants that countries can consult and adapt/adopt in developing a risk-based food business inspection program for their specific context. It is intended to help countries implement risk-based inspection systems that are consistent with international standards. This document builds on the FAO Risk Based Food Inspection manual (2008) and draws on the more recent guidance developed for governments by Codex Alimentarius, in particular, the Principles and Guidelines for National Food Control Systems (CAC/GL 82-2013) and the General Principles of Food Hygiene (CAC/RCP 1-1969). Table of contents RISK-BASED FOOD INSPECTION MANUAL FOR THE CARIBBEAN | Contributions and Acknowledgement | SECTION 1 - INTRODUCTION | SECTION 2 - GUIDING PRINCIPLES AND TERMINOLOGY | Guiding Principles | Terminology | SECTION 3 - RISK-BASED INSPECTION PLANNING AND REPORTING | National Food Profiles | Risk categorization for food | Risk categorization for food businesses | Risk-based inspection planning | General | Establishing inspection priorities | Developing an annual plan | Risk Based Inspection System Reporting | Delivery of planned activities | Program effectiveness | Conclusion | SECTION 4 - PROCEDURES FOR RISK BASED INSPECTION | Types or categories of food business inspection | General guidance | Preparation for the inspection | INSPECTION GUIDELINES AND PROCEDURES | Opening meeting | Guidance 1: Opening Meeting (Medium to large food businesses) | Guidance 2: Opening meeting (Micro and Small food businesses) | Documentation Review | Guidance 3: Documentation review of food businesses with written food control processes | Outside review | Guidance 4: Food business: Outside exterior inspection | Guidance 5: Food business (without a permanent building) outside inspection | Inside review | Guidance 6: Food business (inside) inspection | Guidance 7: Bakeries | Guidance 8: Bottling drinks | Guidance 9: Eggs | Guidance 10: Fish and Fish products | Guidance 11: Market vendors, bulk sales of fruit, vegetables, spices, rice, pulses | Guidance 12: Milk, Dairy | Guidance 13: Poultry and Meat | Guidance 14: Restaurant/Cooked Food | Guidance 15: Retail | Guidance 16: Street food | Guidance 17: Warehouses, Storage facilities | Closing meeting, reporting and follow up | Guidance 18: Medium to Large Food Businesses | Guidance 19: Small and Micro Food Businesses | APPENDIX | Appendix 1: National food profiles | Appendix 2: Food Risks (Information and examples) | Appendix 3: Food business risk scores (draft) form | Appendix 4: Rating guide | Decision tree for rating level of non-compliance | Appendix 5: Inspection Report and Corrective Action Form | Appendix 6: Guidance on Labelling Review (Generic) | Appendix 7: Planning Example | Appendix 8: Case Studies | Case study 1: Retail | Case study 2: Small manufacturer of condiments | Case study 3: street food (doubles) | GLOSSARY | REFERENCES

scholarly journals A Rule-Based System for Human Performance Evaluation: A Case Study

2021 ◽  
Vol 11 (7) ◽  
pp. 2904
Author(s):  
Iva Mikulić ◽  
Dragutin Lisjak ◽  
Nedeljko Štefanić
Keyword(s):  
Decision Making ◽  
Performance Evaluation ◽  
Expert System ◽  
System Application ◽  
Human Performance ◽  
Inspection System ◽  
Decision Making Process ◽  
Rule Based ◽  
Technical Inspection

The issues of many organizations are related to the proper evaluation of human performance and efficient decision-making. The expert system application within the decision-making process is not a novelty, but the widespread of its implementation regarding performance evaluation has not been recognized yet. To overcome this problem, a case study of rule-based expert system application in the decision-making process regarding human performance in periodical technical inspection stations in Croatia is presented. The rule-based expert system improves the quality of traditional decision-making as designed rules provide a visual, transparent, and accurate comparison of observed values with the expected values. Moreover, it provides easy problem identification. Therefore, rules regarding periodical technical inspection inspectors’ performance are designed and embedded in the expert system architecture. However, more effort should be made into data analysis to define parameters and their relations for the purpose of designing rules. Thus, the binary logistic regression and an ANOVA statistical test were conducted to identify which parameters can be assumed as relevant indicators regarding the performance of periodical technical inspection inspectors. In this study, the expert system application has resulted in faster response, greater efficiency, and increased objectivity. That is of utmost importance for providing an efficient and transparent periodical technical inspection system.

scholarly journals Failure analysis in heat exchanger tubes from the top system of the regeneration tower of the hydrotreatment unit in an oil refinery: a case study

2021 ◽  
Vol 26 (3) ◽  
Author(s):  
Jancler Adriano Pereira Nicacio ◽  
Vanessa de Freitas Cunha Lins ◽  
Alexandre Queiroz Bracarense
Keyword(s):  
Heat Exchanger ◽  
Failure Analysis ◽  
Ultrasonic Inspection ◽  
Cooling Water ◽  
Oil Refinery ◽  
Oil Refining ◽  
Inspection System ◽  
Current Test ◽  
Aqueous Flow

ABSTRACT This paper presents a failure analysis performed on tubes of a heat exchanger. Heat exchangers are among the most common equipment in an oil refining industry, as heat transfer is one of the most important and common processes in chemical and petrochemical industries. The equipment analyzed was the condenser of the top system of the diethanolamine regeneration tower of the naphtha hydrotreating unit of an oil refinery. The tubular bundle consists of 78 tubes in the ASTM A213 Grade 316L specification, with 19.05 mm in diameter and 1.65 mm in wall thickness. The tubes are subjected to the aqueous flow of H2S and diethanolamine on the outside and cooling water on the inside. After a scheduled general shutdown in July 2011, after six years of continuous operation, the loss of thickness in several tubes was observed. The result of the failure analysis indicated that, through visual inspection, the corrosive process occurred from outside to inside the tubes. The eddy current test indicated an active corrosive process with a corrosion rate of 0.16775 mm / year. The ultrasonic inspection performed through the internal rotating inspection system (IRIS) confirmed the loss of thickness and the presence of perforated tubes, with consequent loss of containment. Amine corrosion in the presence of H2S was identified as the basic failure mechanism, aggravated by DEA concentration higher than 20 wt.% in the analyzed equipment. In October 2019, the tubes of this exchanger were replaced and the proposed solution to mitigate the problem was to dilute the solution with washing water, to obtain amine solution concentrations below 5% by mass in the beam tubes of the heat exchanger.

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