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IR Absorption Nnalysis of Oxidation Behaviors of Nano-composite Phases with β-FeSi2 Nanocrystals and Si
Get PDFInternational Conference and Summer School on Advanced Silicide Technology 2014, July 19–21, 2014, Tokyo, JapanWe have investigated oxidation behaviors of nano-composite phase with β-FeSi2 nanocrystals (β-NCs) and Si on Si substrates. IR absorption measurements revealed that only oxidation of Si into SiO2 proceeded in the nano-composite phase. This fact is very important for realization of a novel composite phase with β-NCs and SiO2, which may contribute to enhancement of light emission and to prevent a large thermal quenching of light emission observed in the composite phase with β-NCs and Si
車載カメラを用いた障害物検出システムの研究
Get PDF九州工業大学博士学位論文 学位記番号:工博甲第371号 学位授与年月日:平成26年9月26日1 Introduction||2 Obstacles Detection||3 2D and 3D Objects Classification||4 Final Experimental Results and Evaluation||5 Conclusion||ReferencesIn recent years, autonomous collision avoidance systems have been researched and developed for realizing safe driving using cameras and sensors. These systems are designed to warn the drivers the presence of obstacles on the road and help them take a necessary action in advance. In these systems, the ability to detect obstacles is essential. Although various methods of obstacles detection have already been reported, these existing obstacles detection methods have some inadequacies: Some of them can be only used to detect moving obstacles; Some of them cannot extract the shape of obstacles, and they only use a rectangular frame that surrounds an obstacle to represent a detected obstacle; Some of them can only be used to detect one kind of specific object, such as pedestrian detection or vehicle detection.
In order to make up for the inadequacies of the existing obstacles detection method, in this thesis, a method is proposed for detecting obstacles on a road by the employment of the background modeling and the road region detection.
In obstacles detection, true obstacles are defined as arbitrary objects which protrude from the ground plane in the road region, including static and moving objects. Road marks in the road region and objects outside the road region are considered as false obstacles. The output of this obstacles detection method is based on the obstacles’ shape.
In this thesis, we also propose a method of classifying 2D objects and 3D objects. The results of 2D objects and 3D objects classification can be used in the resultant image of obstacles detection to delete 2D objects (such as road marks) and improve the accuracy of obstacles detection.
The originalities of this thesis are as follows:
In the first place, the proposed method can detect arbitrary objects including both static objects and moving objects. This is helpful because static objects such as boxes fallen on the road from a car are dangerous for drivers.
In the second place, the output of the proposed method is the shape of obstacles. Extraction of the shape of an obstacle is important for obstacles recognition. If the detected obstacle is recognized as a pedestrian from its shape, we can foresee his/her next motion.
In the third place, the proposed method can distinguish which objects are 3D objects, and which objects are 2D objects in a pile of objects using a monocular camera. It is useful in the obstacles detection and other applications, such as navigation of walking robots.
In the performed experiments, it is shown that the proposed obstacles detection method is able to extract the shape of both static and moving obstacles in a frontal view from a car
High-throughput DBC-assembled IGBT screening for power module
Get PDF8th International Conference on Integrated Power Electronics Systems (CIPS 2014), February 25-27, 2014, Nuremberg, GermanyHigh-throughput DBC-assembled IGBT screening equipment for a production line is under development in order to prevent early failure of power modules. The equipment has been planning to have automatic GO/NO GO judgment technology by high-throughput measurement of current signal distribution with non-contact sensor arrays with small coils over the bonding wires of IGBT chips. Basic technology and Prototypes of a sensor, an analog amplifier, digital compensation technology, a test head and power circuit have been almost completed. The authors will fabricate the sensor arrays and develop GO/NO GO judgement technology with the integration of a basic technology
A wireless gate-drive circuit using 60-GHz radio-frequency module
Get PDF電子デバイス/半導体電力変換合同研究会, 10月30日-31日, 2014年, 産業技術総合研究所 TIAナノ連携棟, 茨城県Networking of power converters is becoming popular such as smart grid, where wireless communication technology will play an important role. This paper addresses a wireless gate drive circuit for an IGBT using 60-GHz radio-frequency modules. Experimental results verify that the IGBT was driven with a significantly short delay time
Development of Single Camera Finger Touch Position Detection System
Get PDFThis research proposes a Single Camera Finger Touch Position Detection System. Image processing based single camera figure touch position detection approach has several significant advantages: (1) No sensing devices need to be instrumented on the surface of the touch screen. (2) Minimum sensor construction can reduce the failure rate to realize maintenance free system. (3) This approach enables an easy installation and a low-cost touch sensing. The problem of using a single camera is how to detect the touch action and the position of the finger from a single view image. In order to solve this problem, we use the reflected fingertip image appears on the back of the screen. Detecting the fingertip and the reflected image on the screen effectively, we enable to detect touch position only using single camera. In this paper, we provide concrete method, algorithm, implement details, and several experimental results
The Triangulation of Toe-in Style Stereo Camera
No full textThe 2nd International Conference on Intelligent Systems and Image Processing 2014 (ICISIP2014), September 26-29, 2014, Nishinippon Institute of Technology, Kitakyushu, JapanThis study aimed to propose a triangulation by using a consumer 3D camera in order to measure a distance. In traditional method, error of distance measurement was large. The consumer 3D camera is different from a dedicated measurement stereo camera; the optical axes is installed so as to cross in front of lens several meters away (toe-in style), in order to give a sense of reality of human being’s visual characteristic. We examine accuracy of proposed method by mesh data construction
Dielectric properties of Au/C60(OH)24-26/Au structure
Get PDFDielectric properties of the Au/C60 (OH)24-26/Au structure were studied by measuring a.c. impedance and d.c. current in a wide temperature range. Three dielectric response characteristics were identified from Cole-Cole plots of a.c. impedance and dielectric dissipation factor of the structure. First, the bulk resistance and capacitance of the structure were observed at frequencies below 10 Hz, regardless of preparation condition of the Au electrode. Secondly, an interfacial characteristic of the Au foil/C60 (OH)24-26 contact was observed as a peak of dielectric dissipation factor at frequency of 200 Hz. Thirdly, an interfacial characteristic of the Au paste/C60 (OH)24-26 contact was also observed as a peak of dielectric dissipation factor at frequency of 1.7×〖10〗^5 Hz