• Title/Summary/Keyword: wireless sensor network

Search Result 2,813, Processing Time 0.025 seconds

Human Motion Tracking With Wireless Wearable Sensor Network: Experience and Lessons

  • Chen, Jianxin;Zhou, Liang;Zhang, Yun;Ferreiro, David Fondo
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.7 no.5
    • /
    • pp.998-1013
    • /
    • 2013
  • Wireless wearable sensor networks have emerged as a promising technique for human motion tracking due to the flexibility and scalability. In such system several wireless sensor nodes being attached to human limb construct a wearable sensor network, where each sensor node including MEMS sensors (such as 3-axis accelerometer, 3-axis magnetometer and 3-axis gyroscope) monitors the limb orientation and transmits these information to the base station for reconstruction via low-power wireless communication technique. Due to the energy constraint, the high fidelity requirement for real time rendering of human motion and tiny operating system embedded in each sensor node adds more challenges for the system implementation. In this paper, we discuss such challenges and experiences in detail during the implementation of such system with wireless wearable sensor network which includes COTS wireless sensor nodes (Imote 2) and uses TinyOS 1.x in each sensor node. Since our system uses the COTS sensor nodes and popular tiny operating system, it might be helpful for further exploration in such field.

Design of Wired and Wireless linkage Hybrid Sensor Network Model over CATV network (CATV망을 이용한 유무선 연동의 하이브리드 센서 네트워크 모델 설계)

  • Lee, Kyung-Sook;Kim, Hyun-Deok
    • Convergence Security Journal
    • /
    • v.12 no.3
    • /
    • pp.67-73
    • /
    • 2012
  • In this paper, in order to overcome the disadvantage of wireless-based sensor network, a hybrid sensor network using wired and wireless linkage is proposed. Proposed a wired and wireless linkage hybrid sensor network can compensate the defect of poor transmission at the indoor wireless environment, and can be free from interference between a wireless LAN and Bluetooth of the same frequency bandwidth due to an attribute of low-loss transmission at the CATV network. Also, proposed a wired and wireless linkage hybrid sensor network make use of CATV network which is well-built infrastructure, is more efficient to design network, assure a stability and high reliability of the sensor network as providing a stability for an inaccuracy and a predictable transmission link for the existing wireless network.

An Efficient Implementation of Key Frame Extraction and Sharing in Android for Wireless Video Sensor Network

  • Kim, Kang-Wook
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.9 no.9
    • /
    • pp.3357-3376
    • /
    • 2015
  • Wireless sensor network is an important research topic that has attracted a lot of attention in recent years. However, most of the interest has focused on wireless sensor network to gather scalar data such as temperature, humidity and vibration. Scalar data are insufficient for diverse applications such as video surveillance, target recognition and traffic monitoring. However, if we use camera sensors in wireless sensor network to collect video data which are vast in information, they can provide important visual information. Video sensor networks continue to gain interest due to their ability to collect video information for a wide range of applications in the past few years. However, how to efficiently store the massive data that reflect environmental state of different times in video sensor network and how to quickly search interested information from them are challenging issues in current research, especially when the sensor network environment is complicated. Therefore, in this paper, we propose a fast algorithm for extracting key frames from video and describe the design and implementation of key frame extraction and sharing in Android for wireless video sensor network.

Wireless sensor network design for large-scale infrastructures health monitoring with optimal information-lifespan tradeoff

  • Xiao-Han, Hao;Sin-Chi, Kuok;Ka-Veng, Yuen
    • Smart Structures and Systems
    • /
    • v.30 no.6
    • /
    • pp.583-599
    • /
    • 2022
  • In this paper, a multi-objective wireless sensor network configuration optimization method is proposed. The proposed method aims to determine the optimal information and lifespan wireless sensor network for structural health monitoring of large-scale infrastructures. In particular, cluster-based wireless sensor networks with multi-type of sensors are considered. To optimize the lifetime of the wireless sensor network, a cluster-based network optimization algorithm that optimizes the arrangement of cluster heads and base station is developed. On the other hand, based on the Bayesian inference, the uncertainty of the estimated parameters can be quantified. The coefficient of variance of the estimated parameters can be obtained, which is utilized as a holistic measure to evaluate the estimation accuracy of sensor configurations with multi-type of sensors. The proposed method provides the optimal wireless sensor network configuration that satisfies the required estimation accuracy with the longest lifetime. The proposed method is illustrated by designing the optimal wireless sensor network configuration of a cable-stayed bridge and a space truss.

Fundamental Research of Strain-based Wireless Sensor Network for Structural Health Monitoring of Highrise building (초고층 건물의 건전성 감시를 위한 변형률 기반 무선 센서 네트워크 기법의 기초적 연구)

  • Jung, Eun-Su;Park, Hyo-Seon;Choi, Suk-Won;Cha, Ho-Jung
    • 한국방재학회:학술대회논문집
    • /
    • 2007.02a
    • /
    • pp.429-432
    • /
    • 2007
  • For smart structure technologies, the interests in wireless sensor networks for structural health monitoring are growing. The wireless sensor networks reduce the installation of the wire embedded in the whole structure and save the costs. But the wireless sensor networks have lots of limits and there are lots of researches and developments of wireless sensor and the network for data process. Most of the researches of wireless sensor network is applying to the civil engineering structure and the researches for the highrise building are required. And strain-based SHM gives the local damage information of the structures which acceleration-based SHM can not. In this paper, concept of wireless sensor network for structural health monitoring of highrise building is suggested. And verifying the feasibility of the strain-based SHM a strain sensor board has developed and tested by experiments.

  • PDF

Cable tunnel monitoring system by wireless sensor network (무선센서 네트워크에 의한 통신구 모니터링 시스템 개발)

  • Kim, Hyung-Woo
    • 한국정보통신설비학회:학술대회논문집
    • /
    • 2007.08a
    • /
    • pp.176-180
    • /
    • 2007
  • In this study, we deployed the cable tunnel inspection and monitoring system by wireless sensor network. It is shown that the wireless sensor network which is composed of sensor, wireless communication module, and gateway can be applied to cable tunnel monitoring system. Sensors considered herein are flame detection sensor, flood detection sensor, intruder detection sensor, and temperature sensor, etc. It is also found that the wireless sensor network can deliver sensing data reliably by wireless sensing technology. The gateway system that can transmit sensed data to server by CDMA is developed. Monitoring system is constructed by web service technology, and it is observed that this system can monitor the present state of tunnel without difficulties. The system provides an alternative to inspect and monitor the tunnel efficiently where the conventional wired system is infeasible.

  • PDF

Cable Tunnel Monitoring System by Wireless Sensor Network (무선센서 네트워크에 의한 지하 통신구 터널 모니터링 연구)

  • Kim, Hyung-Woo;Moon, Tae-Gyun
    • 한국방재학회:학술대회논문집
    • /
    • 2008.02a
    • /
    • pp.549-552
    • /
    • 2008
  • In this study, we deployed the cable tunnel inspection and monitoring system by wireless sensor network. It is shown that the wireless sensor network which is composed of sensor, wireless communication module, and gateway can be applied to cable tunnel monitoring system. Sensors considered herein are flame detection sensor, flood detection sensor, intruder detection sensor, and temperature sensor, etc. It is also found that the wireless sensor network can deliver sensing data reliably by wireless sensing technology. The gateway system that can transmit sensed data to server by CDMA is developed. Monitoring system is constructed by web service technology, and it is observed that this system can monitor the present state of tunnel without difficulties. The system provides an alternative to inspecting and monitoring the tunnel efficiently where the conventional wired system is infeasible.

  • PDF

Research on Wireless Sensor Networks Security Attack and Countermeasures: Survey (무선 센서 네트워크 보안 위협 및 대응책 연구)

  • Hong, Sunghyuck
    • Journal of Convergence Society for SMB
    • /
    • v.4 no.4
    • /
    • pp.1-6
    • /
    • 2014
  • A wireless sensor network is being actively researched around the world that are connected to the mesh are a plurality of sensor nodes in a wireless manner that span different regions of the techniques. However, wireless communications use the limitation of resources, so it is very weak due to the properties of the network itself secure in comparison to the normal network. Wireless sensor network is divided into tapped-based attacks, forgery based attacks, denial of service attacks based largely by securities laws must defend against various attacks such as insertion of the wrong information being sent eavesdropping or modification of information, which is usually sensor network applications need to do. The countermeasure of sensor network attack is described in this research, and it will contribute to establish a secure sensor network communication.

  • PDF

A Construction of An Intelligent Industry Network through Wireless Sensor Network

  • Yun, Yeo-hong;Hwang, Kwang-il;Han, Woo-young;Eom, Doo-seop
    • Proceedings of the IEEK Conference
    • /
    • 2003.07a
    • /
    • pp.465-468
    • /
    • 2003
  • In industry areas, a lot of factories and process plants need network for processing data acquired from field and for communicating between sensors or actuators or field controllers. Most of the industry networks are based on wired solutions. But, recently, a lot of factories and process plants are moving into wireless solutions since they have some advantages compared with wired one. In this paper we first review the characteristics of wired and wireless network technologies and introduce the new technique called wireless sensor network (WSN). And then we describe the wireless sensor node system designed by us for WSN which has the ability of small size, flexibility and low-power consumption and embedded into the Bar-code scanner to communicate each other. Finally, we conclude this paper by showing that wireless industry network can be constructed with wireless sensor network without large change of traditional wired topologies through experiment using wireless sensor nodes.

  • PDF

Remote Vital Signal Monitoring System Based on Wireless Sensor Network Using Ad-Hoc Routing

  • Walia Gaurav;Lee Young-Dong;Chung Wan-Young
    • Journal of information and communication convergence engineering
    • /
    • v.4 no.2
    • /
    • pp.67-70
    • /
    • 2006
  • A distributed healthcare monitoring system prototype for clinical and trauma patients was developed, using wireless sensor network node. The proposed system aimed to measure various vital physiological health parameters like ECG and body temperature of patients and elderly persons, and transfer his/her health status wirelessly in Ad-hoc network to remote base station which was connected to doctor's PDA/PC or to a hospital's main Server using wireless sensor node. The system also aims to save the cost of healthcare facility for patients and the operating power of the system because sensor network is deployed widely and the distance from sensor to base station was shorter than in general centralized system. The wireless data communication will follow IEEE 802.15.4 frequency communication with ad-hoc routing thus enabling every motes attached to patients, to form a wireless data network to send data to base-station, providing mobility and convenience to the users in home environment.