Abstract: The conventional narrowband power-line communication (NB-PLC) is a two-wire system, that have transmitted its signal between wires with a capacitive coupler. When performing communication between floors at a large-sized building, the signal has to travel over long-distances across a switchboard which supplies electricity to distribution boards. Moreover, the signal is attenuated also at the switchboard and distribution boards. Then signal amplifiers have had to be installed at the boards. In...
英字タイトル:
Proposal of Signal Repeater by One Wire PLC system

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

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

We considered painting of the inner wall of the containment vessel of the reactor and maintenance of the welded part are important. Therefore, we are developing a wall running robot which can paint walls and maintain welded parts even at elevated places. A magnet was used as a tire to make it an adsorption mechanism and a follower. A mechanism that does not use magnets is used for the drive wheels. In the conventional wall motion robot, it was impossible to overcome corner steps. Also, although forward an...
英字タイトル:
Basic research on magnetic force adsorption wall motion mechanism

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