Pub Date : 2012-12-24DOI: 10.1109/CoASE.2012.6386333
Xiaole Yan, Lichen Gu
The estimation of time of flight (TOF) is fundamental to many ultrasonic-based techniques. This paper presents a novel method for estimating time delay of ultrasonic echoes based on vibration theory and signal processing methods. The method is inspired by the physical model of ultrasonic echoes that shows the rising edge of ultrasonic echoes depends on the damping factor of the vibration part of the ultrasonic transducer. The physical model is analyzed and simulated for the understand of the time-domain characters of ultrasonic echoes. For applications, the threshold method is also considered in the method. Two traditional methods of TOF are compared with the proposed by experiment data. It is shown that the proposed method can estimate the starting point of the ultrasonic echo quickly and effectively in the real ranging system.
{"title":"Time-delay estimation of ultrasonic echoes based on the physical model matching","authors":"Xiaole Yan, Lichen Gu","doi":"10.1109/CoASE.2012.6386333","DOIUrl":"https://doi.org/10.1109/CoASE.2012.6386333","url":null,"abstract":"The estimation of time of flight (TOF) is fundamental to many ultrasonic-based techniques. This paper presents a novel method for estimating time delay of ultrasonic echoes based on vibration theory and signal processing methods. The method is inspired by the physical model of ultrasonic echoes that shows the rising edge of ultrasonic echoes depends on the damping factor of the vibration part of the ultrasonic transducer. The physical model is analyzed and simulated for the understand of the time-domain characters of ultrasonic echoes. For applications, the threshold method is also considered in the method. Two traditional methods of TOF are compared with the proposed by experiment data. It is shown that the proposed method can estimate the starting point of the ultrasonic echo quickly and effectively in the real ranging system.","PeriodicalId":80307,"journal":{"name":"The Case manager","volume":"28 1","pages":"469-473"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83544402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-10-13DOI: 10.1109/CASE.2011.6042455
S. S. Martínez, J. Ortega, A. García, J. García
As a great part of the industrial inspection problems require specific, expensive, and highly complex solutions, there is the need to build flexible systems capable to be easily adapted to different models of a part. In this context, this paper proposes the use of a component-based methodology for designing and building flexible inspection systems for automotive headlamp lenses. Through computer vision, and taking into account the different elements that can be utilized in an industrial environment, we propose the use of a component based architecture for easily designing and building industrial inspection systems for this kind of parts. Within this architecture, each software, or hardware element, is encapsulated in a component with a predefined input/ouput layout and, later, it can be used considering the task inspection requirements. The main advantages of the proposed working philosophy are its flexibility, that the resulting machine vision can be easily adapted to any kind of headlamp lens, and that it is fully open to any new component (lighting system, process algorithm, industrial conveyor, etc.). This proposition has been successfully validated building an industrial prototype that was tested in both, the lab, and in a production line.
{"title":"An adaptable vision system for the automatic inspection of surface defects in automotive headlamp lenses","authors":"S. S. Martínez, J. Ortega, A. García, J. García","doi":"10.1109/CASE.2011.6042455","DOIUrl":"https://doi.org/10.1109/CASE.2011.6042455","url":null,"abstract":"As a great part of the industrial inspection problems require specific, expensive, and highly complex solutions, there is the need to build flexible systems capable to be easily adapted to different models of a part. In this context, this paper proposes the use of a component-based methodology for designing and building flexible inspection systems for automotive headlamp lenses. Through computer vision, and taking into account the different elements that can be utilized in an industrial environment, we propose the use of a component based architecture for easily designing and building industrial inspection systems for this kind of parts. Within this architecture, each software, or hardware element, is encapsulated in a component with a predefined input/ouput layout and, later, it can be used considering the task inspection requirements. The main advantages of the proposed working philosophy are its flexibility, that the resulting machine vision can be easily adapted to any kind of headlamp lens, and that it is fully open to any new component (lighting system, process algorithm, industrial conveyor, etc.). This proposition has been successfully validated building an industrial prototype that was tested in both, the lab, and in a production line.","PeriodicalId":80307,"journal":{"name":"The Case manager","volume":"48 1","pages":"157-162"},"PeriodicalIF":0.0,"publicationDate":"2011-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83973626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-10-21DOI: 10.1109/COASE.2010.5584514
Jing Xiao, Li Zheng
In semiconductor assembly and test manufacturing, it is critical to optimize the scheduling of constraint stations to improve the system performance. This paper presents a continuous-time mixed-integer linear programming (MILP) model for the short-term batch scheduling with sequence-dependent setups in semiconductor assembly and test manufacturing to minimize the total completion time of the products. We formulate the problem of scheduling the two constraint stations and develop the MILP-based heuristic scheduling framework. The heuristic algorithm pre-determines the batch size according to the practical business rules and allocates the least flexible machines to the qualified high volume products. The system implementation at a semiconductor ATM factory demonstrates a significant reduction in total completion time compared to the traditional scheduling approach.
{"title":"A MILP-based batch scheduling for two-stage hybrid flowshop with sequence-dependent setups in semiconductor assembly and test manufacturing","authors":"Jing Xiao, Li Zheng","doi":"10.1109/COASE.2010.5584514","DOIUrl":"https://doi.org/10.1109/COASE.2010.5584514","url":null,"abstract":"In semiconductor assembly and test manufacturing, it is critical to optimize the scheduling of constraint stations to improve the system performance. This paper presents a continuous-time mixed-integer linear programming (MILP) model for the short-term batch scheduling with sequence-dependent setups in semiconductor assembly and test manufacturing to minimize the total completion time of the products. We formulate the problem of scheduling the two constraint stations and develop the MILP-based heuristic scheduling framework. The heuristic algorithm pre-determines the batch size according to the practical business rules and allocates the least flexible machines to the qualified high volume products. The system implementation at a semiconductor ATM factory demonstrates a significant reduction in total completion time compared to the traditional scheduling approach.","PeriodicalId":80307,"journal":{"name":"The Case manager","volume":"20 1","pages":"87-92"},"PeriodicalIF":0.0,"publicationDate":"2010-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85628561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-01-01DOI: 10.1109/COASE.2010.5584413
John T. Wen
{"title":"Welcome message from the general chair","authors":"John T. Wen","doi":"10.1109/COASE.2010.5584413","DOIUrl":"https://doi.org/10.1109/COASE.2010.5584413","url":null,"abstract":"","PeriodicalId":80307,"journal":{"name":"The Case manager","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79467554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-01-01DOI: 10.1109/COASE.2009.5234168
Z. Hajej, S. Dellagi, N. Rezg
{"title":"An optimal production/maintenance planning under stochastic random demand, service level and failure rate","authors":"Z. Hajej, S. Dellagi, N. Rezg","doi":"10.1109/COASE.2009.5234168","DOIUrl":"https://doi.org/10.1109/COASE.2009.5234168","url":null,"abstract":"","PeriodicalId":80307,"journal":{"name":"The Case manager","volume":"104 1","pages":"292-297"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79231833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-09-19DOI: 10.1109/COASE.2008.4626531
L. Mönch
In this paper, we present an efficient method to solve unrelated parallel machine total weighted tardiness (TWT) scheduling problems. We apply an ant colony optimization (ACO) approach as a heuristic to solve this NP-hard problem. A colony of artificial ants is used to construct iteratively solutions of the scheduling problem using artificial pheromone trails and heuristic information. For the computation of the heuristic information, we use the apparent tardiness cost (ATC) dispatching rule. We additionally improve the TWT value by applying a decomposition heuristic that solves a sequence of smaller scheduling problems optimally. We report on computational experiments based on stochastically generated test instances. Problems of this type arise in semiconductor manufacturing and have great practical relevance.
{"title":"Heuristics to minimize total weighted tardiness of jobs on unrelated parallel machines","authors":"L. Mönch","doi":"10.1109/COASE.2008.4626531","DOIUrl":"https://doi.org/10.1109/COASE.2008.4626531","url":null,"abstract":"In this paper, we present an efficient method to solve unrelated parallel machine total weighted tardiness (TWT) scheduling problems. We apply an ant colony optimization (ACO) approach as a heuristic to solve this NP-hard problem. A colony of artificial ants is used to construct iteratively solutions of the scheduling problem using artificial pheromone trails and heuristic information. For the computation of the heuristic information, we use the apparent tardiness cost (ATC) dispatching rule. We additionally improve the TWT value by applying a decomposition heuristic that solves a sequence of smaller scheduling problems optimally. We report on computational experiments based on stochastically generated test instances. Problems of this type arise in semiconductor manufacturing and have great practical relevance.","PeriodicalId":80307,"journal":{"name":"The Case manager","volume":"7 1","pages":"572-577"},"PeriodicalIF":0.0,"publicationDate":"2008-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74345047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-01-01DOI: 10.1109/COASE.2008.4626430
Z. Tian, L. Luo
{"title":"Particle filter positioning and tracking based on dynamic model","authors":"Z. Tian, L. Luo","doi":"10.1109/COASE.2008.4626430","DOIUrl":"https://doi.org/10.1109/COASE.2008.4626430","url":null,"abstract":"","PeriodicalId":80307,"journal":{"name":"The Case manager","volume":"43 1","pages":"756-759"},"PeriodicalIF":0.0,"publicationDate":"2008-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81350368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-11-01DOI: 10.1016/S1061-9259(06)00412-7
{"title":"Reach out and touch us on-line","authors":"","doi":"10.1016/S1061-9259(06)00412-7","DOIUrl":"https://doi.org/10.1016/S1061-9259(06)00412-7","url":null,"abstract":"","PeriodicalId":80307,"journal":{"name":"The Case manager","volume":"17 6","pages":"Page 8"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1061-9259(06)00412-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137349223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-11-01DOI: 10.1016/j.casemgr.2006.07.006
{"title":"The drug scene","authors":"","doi":"10.1016/j.casemgr.2006.07.006","DOIUrl":"https://doi.org/10.1016/j.casemgr.2006.07.006","url":null,"abstract":"","PeriodicalId":80307,"journal":{"name":"The Case manager","volume":"17 6","pages":"Pages 16-20"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.casemgr.2006.07.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137349290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-11-01DOI: 10.1016/j.casemgr.2006.08.011
Lewis E. Vierling MS, NCC, NCCC, CRC, CCM
{"title":"The Americans with Disabilities Act, 16 years later","authors":"Lewis E. Vierling MS, NCC, NCCC, CRC, CCM","doi":"10.1016/j.casemgr.2006.08.011","DOIUrl":"10.1016/j.casemgr.2006.08.011","url":null,"abstract":"","PeriodicalId":80307,"journal":{"name":"The Case manager","volume":"17 6","pages":"Pages 24-28"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.casemgr.2006.08.011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26374040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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