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The objective of our research is to develop a wireless sensor network construction system by teleoperated mobile robot. Our proposed system is that mobile robot carries the sensor nodes and deploys them for constructing wireless network in the working environment. For deployment of the sensor nodes, we introduced to estimate maintainable data transfer speed based on statistic approach. When estimated...
After the earthquake, it is very important to recognize the situation of the disaster area as soon as possible. Therefore, the objective of our research is to realize information gathering system applying wireless sensor network technology. This paper describes about development of a novel camera node for gathering the information and also experimental results by using the camera node via wireless...
This paper discusses a wireless sensor node with impact resistance capability. We have been discussing the development of disaster information gathering system utilizing wireless sensor network deployed by rescue robots for underground facility such as metro station. For convenient and efficient deployment of a sensor network, we proposed throwing deployment method. To realize throwing deployment,...
This paper discusses a mobile robot teleoperation system via a wireless sensor network (WSN) to support for rescue operation in underground mall at disaster situation. For this purpose, the teleoperation interface server that controls communication between an operator and a robot via WSN was developed and a routing protocol based on AODV-uu was installed to WSN. The operator can teleoperate of mobile...
This paper describes a wireless camera node with passive pendulum mechanism. We focus on transferring captured movie via wireless network and easy setting-up operation at demonstration site.
Recently there has been a great deal of research on using mobility in sensor networks to assist their sensing tasks. In this paper, we propose a policy-based session control protocol for disruption tolerant sensor networks (DTSNs) called Billiards. In a DTSN, all messages are transported by the physical motion of participants (mobile nodes) in the network. When a large volume of data or continuous...
This paper proposes two schemes for wireless sensor networks with multiple sinks in order to save battery energy and to improve network lifetime performance. In these schemes, each sensor node transmits sensing data to randomly chosen sink according to the sending rates. These schemes are referred to as DispersiveCast. The first decentralized scheme called B-DOP scheme (basic DispersiveCast of packet),...
A high-sensitivity rectifier is fabricated in a 0.3 /spl mu/m CMOS technology. The circuit can rectify an RF signal less than the NMOS threshold voltage by using a bias voltage between the gate and the drain terminals of a transistor. The IC achieves a 950 MHz signal rectification over -14 dBm corresponding to 10 m-distance communication and recharges a 1.2 V secondary battery.
This paper presents an overview of WISER which is a communication architecture for multiple mobile robots with short-range wireless links aiming at cooperative sensing. WISER deals with several features which were not observed in conventional wireless ad hoc networks: intentional mobility and allowance for disconnection. In this paper we describe the design and the prototype implementation of WISER
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