Fukuoka Industry Science and Technology Foundation

Fukuoka-shi, Japan

Fukuoka Industry Science and Technology Foundation

Fukuoka-shi, Japan

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Miyase K.,Kyushu Institute of Technology | Sakai R.,Kyushu Institute of Technology | Wen X.,Kyushu Institute of Technology | Aso M.,Renesas Electronics Corporation | And 3 more authors.
IEICE Transactions on Information and Systems | Year: 2013

Test power has become a critical issue, especially for lowpower devices with deeply optimized functional power profiles. Particularly, excessive capture power in at-speed scan testing may cause timing failures that result in test-induced yield loss. This has made capturesafety checking mandatory for test vectors. However, previous capturesafety checking metrics suffer from inadequate accuracy since they ignore the time relations among different transitions caused by a test vector in a circuit. This paper presents a novel metric called the Transition-Time-Relation-based (TTR) metric which takes transition time relations into consideration in capture-safety checking. Detailed analysis done on an industrial circuit has demonstrated the advantages of the TTR metric. Capturesafety checking with the TTR metric greatly improves the accuracy of test vector sign-off and low-capture-power test generation. Copyright © 2013 The Institute of Electronics, Information and Communication Engineers.


Miyase K.,Kyushu Institute of Technology | Miyase K.,Japan Science and Technology Agency | Wen X.,Kyushu Institute of Technology | Wen X.,Japan Science and Technology Agency | And 5 more authors.
Proceedings -Design, Automation and Test in Europe, DATE | Year: 2011

Excessive capture power in at-speed scan testing may cause timing failures, resulting in test-induced yield loss. This has made capture-safety checking mandatory for test vectors. This paper presents a novel metric, called the TTR (Transition-Time-Relation-based) metric, which takes transition time relations into consideration in capture-safety checking. Capture-safety checking with the TTR metric greatly improves the accuracy of test vector sign-off and low-capture-power test generation. © 2011 EDAA.


Miyase K.,Kyushu Institute of Technology | Aso M.,Renesas Electronics Corporation | Ootsuka R.,Renesas Electronics Corporation | Wen X.,Kyushu Institute of Technology | And 4 more authors.
Proceedings of the IEEE VLSI Test Symposium | Year: 2012

Excessive capture power in at-speed scan testing may cause yield loss due to timing failures. Although reducing the number of clock domains that capture test responses simultaneously is a practical and scalable solution for reducing capture power, no available capture-safety checking metric can assess its effect in an accurate-enough manner, especially when multiple clock domains capture test responses in a short period of time. This paper proposes a novel CLEAR (CLock-Edge-Arrival-Relation-based) capture-safety checking method that, for the first time, takes clock edge arrival times for different clock domains into consideration. The accuracy and usefulness of the proposed method have been clearly demonstrated by simulation-based evaluation with the largest ITC'99 benchmark circuit as well as real-chip-based evaluation with an industrial chip embedded with on-chip delay measurement circuitry. © 2012 IEEE.


Kanda A.,Kyushu Institute of Technology | Sato M.,Fukuoka Industry Science and Technology Foundation | Ishii K.,Kyushu Institute of Technology
2010 World Automation Congress, WAC 2010 | Year: 2010

Autonomous mobile robot needs various applications such as a control system, environment recognition, decision making, self localization, mapping, and obstacle avoidance. We developed the environment recognition system for wheeled mobile robot because these applications are mostly based on the environment recognition. In our previous research, we developed the wheeled mobile robot with passive linkage mechanism for outdoor environment and evaluate the mobility. And, we proposed environment recognition system using passive linkage mechanism data analyzed self-organizing map. This paper describes our proposed method which is the environment recognition system using the image processing. Using our proposed method, the environment recognition system could succeed self localization and the number of templates is decreased because our method using self organizing map has interpolation function. © 2010 TSI Press.


Yamato Y.,Fukuoka Industry Science and Technology Foundation | Wen X.,Kyushu Institute of Technology | Kochte M.A.,Kyushu Institute of Technology | Kochte M.A.,University of Stuttgart | And 3 more authors.
Proceedings - International Test Conference | Year: 2011

High power consumption in scan testing can cause undue yield loss which has increasingly become a serious problem for deep-submicron VLSI circuits. Growing evidence attributes this problem to shift timing failures, which are primarily caused by excessive switching activity in the proximities of clock paths that tends to introduce severe clock skew due to IR-drop-induced delay increase. This paper is the first of its kind to address this critical issue with a novel layout-aware scheme based on scan segmentation design, called LCTI-SS (Low-Clock-Tree-Impact Scan Segmentation). An optimal combination of scan segments is identified for simultaneous clocking so that the switching activity in the proximities of clock trees is reduced while maintaining the average power reduction effect on conventional scan segmentation. Experimental results on benchmark and industrial circuits have demonstrated the advantage of the LCTI-SS scheme. © 2011 IEEE.


Demizu A.,Nagasaki University | Matsuda H.,Nagasaki University | Ito Y.,Saga University | Hida K.,K and T Consultant Co. | And 3 more authors.
Bridge Maintenance, Safety, Management, Resilience and Sustainability - Proceedings of the Sixth International Conference on Bridge Maintenance, Safety and Management | Year: 2012

This studyis to show the capability of the line sensor scanner to measure the deformation and the strain of the concrete structure in high accuracy and noncontact under a robust environment.in the field. The line sensor scanner was develped by utilizing digital image correlation method in a full field optical scheme. At the preliminary test on steel members, the same level of accuracy obtained by strain gage was confirmed and verified. Moreover, through the monitoring of the strains on the concrete surface at the main girder bottom flange during a loading test on the post-tension PCT beam bridge, by comparing with other measurement methods, the line sensor scanner was confirmed to have satisfactory results in high accuracy and high reliability in a field bridge. © 2012 Taylor & Francis Group.

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