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論文
マイクロ波入射部最適化による マイクロ波探傷技術の高度化
著者:
佐々木 幸太,Kota SASAKI,遊佐 訓孝,Noritaka YUSA,若井 隆純,Takashi WAKAI,橋爪 秀利,Hidetoshi HASHIZUME
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キーワードタグ:
finite-element simulation microwave nondestructive testing pipe diameter pipe wall thinning
佐々木 幸太,Kota SASAKI,遊佐 訓孝,Noritaka YUSA,若井 隆純,Takashi WAKAI,橋爪 秀利,Hidetoshi HASHIZUME
発刊日:
公開日:
キーワードタグ:
finite-element simulation microwave nondestructive testing pipe diameter pipe wall thinning
Abstract: This study reports the development of a new microwave probe for the nondestructive testing of a pipe. Three-dimensional finite element simulations are carried out to optimize the profile of a microwave probe, whose results show that a probe with elliptic profile enables smaller reflection at the probes as well as much better single-mode propagation inside the pipe than conventional ones. Experimental validations are carried out using a straight brass pipe with an inner diameter of 39 mm and...
英字タイトル:
Enhancement of microwave nondestructive testing method for the inspection of pipes by optimizing the microwave probe profile
英字タイトル:
Enhancement of microwave nondestructive testing method for the inspection of pipes by optimizing the microwave probe profile
第14回
マルチコプタの屋内飛行システムに関する一提案
著者:
三輪 昌史,Masafumi MIWA,佐々木 隆志,Takashi SASAKI,松井 隆,Takashi MATSUI
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AR Marker LIDAR LRF Obstacle avoidance UAV
三輪 昌史,Masafumi MIWA,佐々木 隆志,Takashi SASAKI,松井 隆,Takashi MATSUI
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AR Marker LIDAR LRF Obstacle avoidance UAV
Recently, Unmanned Aerial Vehicle is used in many purpose such as wall inspection and disaster relief. When UAV flies indoor field, GPS can’t be used because radio waves from the satellites do not reach. Therefore, other positioning systems are necessary for indoor autonomous flight. Also detecting and avoiding obstacle system is necessary. In this study, we report the result of obstacle detecting / avoiding system using LIDARs. Also we present an indoor flight system including obstacle detecting and avo...
英字タイトル:
An Automatic Navigation System for Multi-copter
英字タイトル:
An Automatic Navigation System for Multi-copter
第14回
マーカーによるドローンの屋内自律飛行
著者:
佐々木 隆志,Takashi SASAKI,松井 隆,Takashi MATSUI
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AR-marker autonomous navigation drone indoor flight
佐々木 隆志,Takashi SASAKI,松井 隆,Takashi MATSUI
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AR-marker autonomous navigation drone indoor flight
Abstract: In this paper, we show an implementation of AR-marker based flight routing system with smartphone-grade visible light camera and low-cost microcontroller board. It not depend on any other special equipment such as depth sensor and visual recongition and can continue to trace markers autonomously. This system is intended to be used as supplemental navigation method in the situation than other sophisticates locating method such as 3D-SLAM cannot be used in acctident or restriction....
英字タイトル:
Autonomous indoor navigation for drones with AR marker
英字タイトル:
Autonomous indoor navigation for drones with AR marker
第10回
長期停止無線ノード間の通信における電力制御
著者:
佐々木 隆志,Takashi SASAKI,松井 隆,Takashi MATSUI
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long term monitoring power efficiency sensor network synchronized data transmission
佐々木 隆志,Takashi SASAKI,松井 隆,Takashi MATSUI
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long term monitoring power efficiency sensor network synchronized data transmission
For a long term data gathering over sensor network via battery powered wir eless node, intermittent operation and periodical sleep is mandatory to a chieve energy savings. Synchronized data transmission technique is widely used for this purpose and central controller is usually required. When th e synchronization is lost and a wireless node loses its counterpart, it sh ould start continuous observation and the power consumption increases. Su ch situation is commonly-seen in system failure. In this paper w...
英字タイトル:
Power management for wireless network with long-time sleeping nodes
英字タイトル:
Power management for wireless network with long-time sleeping nodes