• 제목, 요약, 키워드: smart sensor network

검색결과 469건 처리시간 0.051초

능동형 텔레매트릭스를 위한 IEEE 1451 기반 ZigBee 스마트 센서 시스템의 구현 (Implementation of IEEE 1451 based ZigBee Smart Sensor System for Active Telemetries)

  • 이석;송영훈;박지훈;김만호;이경창
    • 한국정밀공학회지
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    • v.28 no.2
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    • pp.176-184
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    • 2011
  • As modern megalopolises become more complex and huge, convenience and safety of citizens are main components for a welfare state. In order to make safe society, telemetrics technology, which remotely measures the information of target system using electronic devices, is an essential component. In general, telemetrics technology consists of USN (ubiquitous sensor network) based on a wireless network, smart sensor, and SoC (system on chip). In the smart sensor technology, the following two problems should be overcome. Firstly, because it is very difficult for transducer manufacturers to develop smart sensors that support all the existing network protocols, the smart sensor must be independent of the type of networking protocols. Secondly, smart sensors should be modular so that a faulty sensor element can be replaced without replacing healthy communication element. To solve these problems, this paper investigates the feasibility of an IEEE 1451 based ZigBee smart sensor system. More specifically, a smart sensor for large network coverage has been developed using ZigBee for active telemetrics.

Wireless sensor network for decentralized damage detection of building structures

  • Park, Jong-Woong;Sim, Sung-Han;Jung, Hyung-Jo
    • Smart Structures and Systems
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    • v.12 no.3_4
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    • pp.399-414
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    • 2013
  • The smart sensor technology has opened new horizons for assessing and monitoring structural health of civil infrastructure. Smart sensor's unique features such as onboard computation, wireless communication, and cost effectiveness can enable a dense network of sensors that is essential for accurate assessment of structural health in large-scale civil structures. While most research efforts to date have been focused on realizing wireless smart sensor networks (WSSN) on bridge structures, relatively less attention is paid to applying this technology to buildings. This paper presents a decentralized damage detection using the WSSN for building structures. An existing flexibility-based damage detection method is extended to be used in the decentralized computing environment offered by the WSSN and implemented on MEMSIC's Imote2 smart sensor platform. Numerical simulation and laboratory experiment are conducted to validate the WSSN for decentralized damage detection of building structures.

IEEE 1451.0 기반 스마트 센서에서 CANopen을 이용한 다중 접속 기능의 구현 (Implementation of Multiple Connectivity using CANopen in IEEE 1451.0-based Smart Sensor)

  • 박지훈;이석;송영훈;이경창
    • 한국정밀공학회지
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    • v.28 no.4
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    • pp.436-445
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    • 2011
  • As automation systems become intelligent and autonomous for productibility, industrial networks (fieldbuses) and network-based devices are essential components of intelligent manufacturing systems. However, there are obstacles for the wide acceptance of the network-based devices such as smart sensor and network-based actuator. First, there exist numerous fieldbus protocols that a network-based device should be able to support. Second, the whole network-based device has to be replaced when only the sensor of the module fails. In order to overcome these obstacles, a smart sensor/actuator is implemented as two units; one responsible for network communication and the other for sensor/actuator operations using IEEE 1451.0 standard. This paper presents a structure of the 1451.0-based smart sensor with multiple connectivity function designed by CANopen.

도시철도 직류 전력량 계측을 위한 직류용 스마트미터링 시스템 개발 및 성능시험 (Development and Performance Test of DC Smart Metering System for the DC Power Measurement of Urban Railway)

  • 정호성;신승권;김형철;박종영
    • 전기학회논문지
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    • v.63 no.5
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    • pp.713-718
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    • 2014
  • DC urban railway power system consists of DC power network and AC power network. The DC power network supplies electric power to railway vehicles and the AC power network supplies electric power to station electric equipment. Recently, because of power consumption reduction and peak load shaving, intelligent measurement of regenerative energy and renewable energy adapted on DC urban railway is required. For this reason, DC smart metering system for DC power network shall be developed. Therefore, in this paper, DC voltage sensor, current sensor, and DC smart meter were developed and evaluated by performance test. DC voltage sensor was developed for measuring standard voltage range of DC urban railway, and DC current sensor was developed as hall effect split core type in order to install in existing system. DC smart meter possesses function of general intelligent electric power meter, such as measuring electricity and wireless communication etc. And, DC voltage sensor showed average 0.17% of measuring error for 2,000V/50mA, and current sensor showed average 0.21% of measuring error for ${\pm}2,000V/{\pm}4V$ in performance test. Also DC smart meter showed maximum 0.92% of measuring error for output of voltage sensor and current sensor. In similar environment for real DC power network, measuring error rate was under 0.5%. In conclusion, accuracy of DC smart metering system was confirmed by performance test, and more detailed performance will be verified by further real operation DC urban railway line test.

IEEE 1451 기반의 Wireless Smart Sensor Node와 NCAP 시스템의 제안과 구현 (The Proposal and Implementation of Wireless Smart Sensor Node and NCAP System based on the IEEE 1451)

  • 허정일;임수영;서정호;김우식
    • 전자공학회논문지CI
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    • v.44 no.5
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    • pp.28-37
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    • 2007
  • IEEE 1451 standard는 네트워크와 transducer간에 표준 interface를 정의한다. 본 논문에서는 IEEE 1451 Standard 기반의 data acquisition system과 무선 smart sensor node를 구성하기 위한 구조적인 모델을 제안한다. 제안 된 Network Capable Application Processor(NCAP)은 data acquisition의 역할과 smart sensor node와 네트워크 사이에 가교 역할을 한다. 또한 무선 sensor node에게 영향을 주지 않으면서 재구성이 가능하고 DB를 이용하여 transducer의 정확한 정보를 얻는다. Smart sensor node는 그 자신에 관한 기본적인 정보를 디지털 형식으로 제공하는 능력을 가지고 있다. 이 디지털 형식은 Transducer Electronic Data Sheet(TEDS)라 하며 sensor node의 plug-and-play 기능을 가능하게 한다. IEEE 1451.4에서 정의하고 있는 TEDS와 Template를 무선 환경에서 적용하기 위해 형식을 간략화 하였으며 ad-hoc routing을 통해 전송이 이루어진다. 본 연구 시스템은 의료정보 서비스를 제공하기 위한 목적으로 체온과 ECG(Electrocardiogram) 센서를 사용하였다. Template 형식은 센서들의 data sheet를 통해 결정하였으며 센서의 특징을 정확히 표현하기 위해 재구성하였다. NCA의 DB는 다양한 센서 개발에 따라 새로운 Template 및 하부 항목의 등록이 가능하도록 구현하였다.

Implementation of a Remote Bio-Equipment System for Smart Healthy Housing Properties

  • Han, Seung-Hoon
    • KIEAE Journal
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    • v.14 no.6
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    • pp.23-29
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    • 2014
  • It is essential to investigate the structure and the main characteristics of BSN (Bio-Sensor Network) platform in built smart healthcare environment while designing healthy housing facilities. For this study, WSN (Wireless Sensor Network) data transmission technologies have been employed with medical sensors, and optimal medical devices would provide various Web 2.0 services by connecting to the WiBro network. The BSN platform normally recognizes in surroundings of WBAN (Wireless Body Area Network) or WPAN (Wireless Personal Area Network), and it is possible to manage sensor nodes by utilizing SOAP (Simple Object Access Protocol) and REST (REpresentational State Transfer). In addition, the feature of SNMP (Simple Network Management Protocol) for mobile gateway is also included for being adapted to huge network structure. Finally, BSN platform will play a role as important clues for developing personal WSN service models for smart healthy housing properties.

WiSeMote: a novel high fidelity wireless sensor network for structural health monitoring

  • Hoover, Davis P.;Bilbao, Argenis;Rice, Jennifer A.
    • Smart Structures and Systems
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    • v.10 no.3
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    • pp.271-298
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    • 2012
  • Researchers have made significant progress in recent years towards realizing effective structural health monitoring (SHM) utilizing wireless smart sensor networks (WSSNs). These efforts have focused on improving the performance and robustness of such networks to achieve high quality data acquisition and distributed, in-network processing. One of the primary challenges still facing the use of smart sensors for long-term monitoring deployments is their limited power resources. Periodically accessing the sensor nodes to change batteries is not feasible or economical in many deployment cases. While energy harvesting techniques show promise for prolonging unattended network life, low power design and operation are still critically important. This research presents the WiSeMote: a new, fully integrated ultra-low power wireless smart sensor node and a flexible base station, both designed for long-term SHM deployments. The power consumption of the sensor nodes and base station has been minimized through careful hardware selection and the implementation of power-aware network software, without sacrificing flexibility and functionality.

Investigation of smart multifunctional optical sensor platform and its application in optical sensor networks

  • Pang, C.;Yu, M.;Gupta, A.K.;Bryden, K.M.
    • Smart Structures and Systems
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    • v.12 no.1
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    • pp.23-39
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    • 2013
  • In this article, a smart multifunctional optical system-on-a-chip (SOC) sensor platform is presented and its application for fiber Bragg grating (FBG) sensor interrogation in optical sensor networks is investigated. The smart SOC sensor platform consists of a superluminescent diode as a broadband source, a tunable microelectromechanical system (MEMS) based Fabry-P$\acute{e}$rot filter, photodetectors, and an integrated microcontroller for data acquisition, processing, and communication. Integrated with a wireless sensor network (WSN) module in a compact package, a smart optical sensor node is developed. The smart multifunctional sensor platform has the capability of interrogating different types of optical fiber sensors, including Fabry-P$\acute{e}$rot sensors and Bragg grating sensors. As a case study, the smart optical sensor platform is demonstrated to interrogate multiplexed FBG strain sensors. A time domain signal processing method is used to obtain the Bragg wavelength shift of two FBG strain sensors through sweeping the MEMS tunable Fabry-P$\acute{e}$rot filter. A tuning range of 46 nm and a tuning speed of 10 Hz are achieved. The smart optical sensor platform will open doors to many applications that require high performance optical WSNs.

Flexible smart sensor framework for autonomous structural health monitoring

  • Rice, Jennifer A.;Mechitov, Kirill;Sim, Sung-Han;Nagayama, Tomonori;Jang, Shinae;Kim, Robin;Spencer, Billie F. Jr.;Agha, Gul;Fujino, Yozo
    • Smart Structures and Systems
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    • v.6 no.5_6
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    • pp.423-438
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    • 2010
  • Wireless smart sensors enable new approaches to improve structural health monitoring (SHM) practices through the use of distributed data processing. Such an approach is scalable to the large number of sensor nodes required for high-fidelity modal analysis and damage detection. While much of the technology associated with smart sensors has been available for nearly a decade, there have been limited numbers of fulls-cale implementations due to the lack of critical hardware and software elements. This research develops a flexible wireless smart sensor framework for full-scale, autonomous SHM that integrates the necessary software and hardware while addressing key implementation requirements. The Imote2 smart sensor platform is employed, providing the computation and communication resources that support demanding sensor network applications such as SHM of civil infrastructure. A multi-metric Imote2 sensor board with onboard signal processing specifically designed for SHM applications has been designed and validated. The framework software is based on a service-oriented architecture that is modular, reusable and extensible, thus allowing engineers to more readily realize the potential of smart sensor technology. Flexible network management software combines a sleep/wake cycle for enhanced power efficiency with threshold detection for triggering network wide operations such as synchronized sensing or decentralized modal analysis. The framework developed in this research has been validated on a full-scale a cable-stayed bridge in South Korea.

오픈 소스 하드웨어 기반의 스마트 센서 네트워크 시스템 구현 (Implementation of Smart Sensor Network System Based on Open Source Hardware)

  • 권오석;김기환
    • 한국인터넷방송통신학회논문지
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    • v.17 no.1
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    • pp.123-128
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    • 2017
  • 본 논문에서 오픈 소스 하드웨어인 아두이노를 기반으로 하는 스마트 센서 네트워크 시스템 모델을 제안하고 구현하였다. 제안된 스마트 센서 네트워크 시스템은 센서 및 센서의 값을 처리할 수 있는 오픈 소스 하드웨어 기반인 아두이노 등으로 구성된다. 또한 센서로 부터 측정된 센서값을 활용할 수 있는 제어 장치부에 전송할 통신 모듈도 구성하였다. 제어 장치부에서는 온도, 습도, 광량과 같은 센서 데이터를 메인 프로그램으로 전송하고 메인 프로그램은 데이터를 DB에 저장하거나 특정한 제어 신호의 값을 제어장치 혹은 엑츄에이터에 전송한다. 사용자는 또한 웹을 통해 스마트 센서 네트워크에서 측정된 값을 사용하는 시스템의 정보를 확인하거나 각종 액츄에이터를 원격 제어할 수 있으며 제안 시스템의 상황 인지 및 자율 제어 기능을 통해 스마트한 관리가 가능하다.