Remote Identification for Smart-meter Operation Error based on a Wireless Sensor Network in a Smart City

Wenyu Liu,Haishan Zhou,Muxin Zhang,Ying Shang,Yudan Liu 대한전자공학회 2022 IEIE Transactions on Smart Processing & Computing Vol.11 No.6

This paper presents a remote identification method for smart-meter operation errors based on a wireless sensor network (WSN) in a smart city to reduce the bad operation of smart meters. In the WSN, ZigBee communication technology was used to collect data from smart meters to enhance the reliability of information. The LEACH protocol can effectively extend the network life cycle and was selected as a communication protocol for WSNs to collect operation data from intelligent meters. Based on the operation data of a smart meter collected by a WSN, a remote identification model of operation error of a smart meter was established. The limited memory least square algorithm was adopted to construct the remote identification model of operation error for a smart meter to realize the remote identification of a smart-meter error in a smart city. The proposed method can use a WSN to collect operation data from a smart meter and remotely identify the mean absolute percentage error (MAPE) and root mean square error (RMSE) of a smart meter’s operation error, which were less than 1%.

Wireless sensor network for decentralized damage detection of building structures

Park, Jong-Woong,Sim, Sung-Han,Jung, Hyung-Jo Techno-Press 2013 Smart Structures and Systems, An International Jou Vol.12 No.3

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.

스마트 홈 네트워크 구성을 위한 적응형 센서 데이터 전송 스케줄링 기법

윤용탁,이규창,나탈리 실바,한기준 한국정보과학회 2020 정보과학회 컴퓨팅의 실제 논문지 Vol.26 No.10

Recently, as smart home construction based on Internet-of-Things (IoT) has been actively developed, smart devices including various sensors have been used for the smart home construction. The Various sensors included in smart devices collect unique data and actively manage smart homes using the collected data. However, unnecessary power consumption occurs in the process of delivering the data collected by the sensors to the external platforms or users, leading a reduction in the energy efficiency. In this paper, we propose an adaptive sensor data transmission scheduling scheme that schedules the period of the data transmission to the central server based on the change pattern of the data measured by each sensor. The proposed scheme minimizes unnecessary data transmission by adjusting the transmission period for each sensor by using the class identifier. This can reduce power consumption for the data transfer between the various smart devices and a central server. 최근 Internet-of-Thing(IoT) 기반의 스마트 홈 구축이 활발하게 이루어면서, 그에 따라 스마트 홈 구축을 위해 다양한 센서들이 포함된 스마트 디바이스들이 사용되고 있다. 스마트 디바이스에 포함된 다양한 센서들은 고유의 데이터를 수집하고, 수집된 데이터를 활용하여 능동적으로 스마트 홈을 관리한다. 하지만 센서들이 수집한 데이터를 활용하기 위해 외부 플랫폼이나 사용자에게 전달하는 과정에서 불필요한 전력 소비가 발생하고, 이는 에너지 효율의 감소로 이어진다. 본 논문에서는, 각각의 센서에서 측정되는 데이터의 변화 패턴을 바탕으로 중앙 서버로 데이터를 전송하는 주기를 스케줄링하는 적응형 센서 데이터 전송 스케줄링 기법을 제안한다. 제안된 기법은 클래스 식별자를 활용하여 센서별 전송 주기를 조절하여 불필요한 데이터의 전송을 최소화 시킨다. 이는 결과적으로 다양한 스마트 디바이스와 중앙 서버 사이의 데이터 전송에 필요한 소비 전력을 감소시킬 수 있다.

무선통신모듈과 스마트폰 application을 이용한 RGB-LED와 sensor 컨트롤

황준연,최근준,원진영,황인철 강원대학교 정보통신연구소 2015 정보통신논문지 Vol.19 No.-

In modern society, a variety of techniques using a plurality of LED control technology, sensor and a technique utilizing a smart-phone application in the wi-fi environment has evolved. If you use the above technique, it will be able to control lighting decoration more convenient by transmitting and receiving color information of the information and LED obtained from sensor wirelessly consists of LED. In this design, wide wi-fi wireless communication module and sensor by combining control system utilizing information remote LED color and brightness in the obtained from sensor environment to has been used LED control functions in real life to try to implement a system that can be controlled.

Wireless sensor network for decentralized damage detection of building structures

박종웅,심성한,정형조 국제구조공학회 2013 Smart Structures and Systems, An International Jou Vol.12 No.4

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.

지능형 주택을 위한 구성원 식별 및 위치 이동 감지 센서 네트워크 시스템

이선우(Seon-Woo Lee),양승용(Seung-Yong Yang) 한국정보과학회 2010 정보과학회논문지 : 정보통신 Vol.37 No.5

지능형 주택의 상황인지 서비스를 위해서는 거주자의 현재 위치를 파악하는 것이 필수적이다. 이를 위해 본 논문에서는 사용자에게 별도의 장치 소지를 요구하지 않으며 특정 문에 대한 출/입 행동과 같은 위치 이동과 그 사람이 누구인지를 식별하는 센서 네트워크 시스템을 제안한다. 새롭게 개발된 센서노드는 선행 연구 결과[1]의 짧은 동작 수명 문제를 해결한 것으로 2개의 초전형(PIR) 센서와 초음파 센서, 그리고 2.4 ㎓ 무선 통신 모듈로 구성된다. 제안된 구성원의 식별 방법은 초음파 센서를 이용한 구성원의 키 차이를 이용한다. 거주자의 위치 이동의 감지는 출/입 행동의 감지에 기초하며 이와 같은 출/입 행동 감지는 2개의 PIR 센서의 감지 순서에 기초하여 이루어진다. 전체 센서 네트워크의 구성은 각 센서노드가 수신 노드와 과 1대1로 연결되는 별 형태로 이루어져 있다. 제안된 시스템은 본보기주택에 설치되어 3명의 사용자를 대상으로 실험되었고, 그 결과 완벽한 출/입 행동 감지와 평균 81.3%의 구성원 식별성능을 얻었다. The tracking of current location of residents is an essential requirement for contextaware service of smart houses. This paper presents a wireless sensor network system which could detect location transition such as entrance and exit to a room and also identify the user who passed the room, without duty of wearing any sort of tag. We designed new sensor node to solve the problem of short operation lifetime of previous work[1] which has two pyroelectric infrared (PIR) sensors and an ultrasonic sensor, as well as a 2.4 ㎓ radio frequency wireless transceiver. The proposed user identification method is to discriminate a person based on his/her height by using an ultrasonic sensor. The detection idea of entering/exiting behavior is based on order of triggering of two PIR sensors. The topology of the developed wireless sensor network system is simple star structure in which each sensor node is connected to one sink node directly. We evaluated the proposed sensing system with a set of experiments for three subjects in a model house. The experimental result shows that the averaged recognition rate of user identification is 81.3% for three persons, and perfect entering/exiting behavior detection performance.

Smart city designing and planning based on big data analytics

Khan, Murad,Babar, Muhammad,Ahmed, Syed Hassan,Shah, Sayed Chhattan,Han, Kijun Elsevier 2017 Sustainable cities and society Vol.35 No.-

<P><B>Abstract</B></P> <P>The Internet of Things (IoT) provides a global communication network between millions of devices connected to the internet. Similarly, the emergence of heterogeneous wireless networks provides a medium to the IoT communication paradigm. In order to enable an energy-friendly communication in an IoT environment, such as smart home, office, city, etc. we propose an energy-aware communication systems for IoT environments. The proposed scheme works in several phases such as identification of high energy require appliances, deployment of sensors, scheduling, etc. Moreover, the data from the IoT devices are collected through sensors. The data is tested using the Hadoop ecosystem for future planning and efficient usage of the energy in an IoT environment. The proposed architecture is tested in a different scenario against the Wireless Sensor Network (WSN) based IoT architecture in the context of energy consumption. The proposed architecture performs efficiently than WSN in a number of scenarios. Similarly, the efficiency and processing time of the Hadoop system is computed which shows better results.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Internet of Things (IoT) provides a global communication network between millions of devices. </LI> <LI> Energy-aware communication systems for IoT environments. </LI> <LI> Scheduling mechanisms are used to prioritize the home appliances. </LI> </UL> </P>

스마트 빌딩에서 사물인터넷 기반 탄력적 소방 대피 안내 시스템

심승민,양태훈,서동영,김상하 한국통신학회 2022 韓國通信學會論文誌 Vol.47 No.3

Indoor fires cause a big loss of property and human life in environments which especially increasingly complex buildings for multiple purposes. Thus, fire prevention systems are built in most of the buildings to protect people and property. Such systems provide information to prevent the spread of fire and induce people to evacuate by managing the information detected from the fire sensor through a central server. However, due to the dependence of the existing systems on the central server, it is not trivial to flexibly respond to the changing situation every moment. Therefore, to solve this problem, we propose an IoT-based elastic fire safety navigation system in smart buildings. The proposed system mitigates a problem by the dependence on a central server of existing systems. For this, a fire safety network monitors fire situations via information exchange between sensors. Through network-based fire information, evacuation paths could be directly provided to the evacuees via their smartphones. The experiments are conducted via a proof-of-concept for the proposed scheme. The results are shown that the proposed scheme is superior to the existing system. 실내 화재는 재산과 인명에 큰 손실을 야기하며, 특히 다양한 목적을 위해 점점 더 복잡해지는 오늘날의 건물에서는 그 문제가 더욱 심화된다. 따라서 모든 건물에는 인명과 재산을 보호하기 위한 소방 방재 시스템이 구축된다. 이러한 시스템은 화재 센서로부터 감지된 정보를 중앙 서버를 통해 관리하여, 화재의 확산을 저지하거나 사람들의 대피를 유도하기 위한 정보를 제공하는 데 사용된다. 하지만, 기존 시스템들은 중앙 서버에 의존하기 때문에시시각각 변화하는 상황에 탄력적으로 대응하기는 쉽지 않다. 따라서 이러한 문제를 해결하기 위해 우리는 스마트빌딩에서 IoT 기반의 탄력적 화재 안전 내비게이션 시스템을 제안한다. 제안하는 시스템은 중앙 서버에 의존하는기존 시스템들의 문제를 완화한다. 이를 위해서, 화재안전망은 센서들 간 정보교환을 통해 화재 상황을 감시한다. 그리고 네트워크 기반의 화재 정보를 통해 대피자들의 스마트폰을 통해 대피 경로를 직접 제공할 수 있다. 실험은제안된 계획에 대한 개념 증명을 통해 수행되며, 실험 결과는 제안된 방식이 기존 시스템보다 우수함을 보인다.

Feasibility study of a non invasive Cardiac Rhythm Management System

Peter Leijdekkers,Valerie Gay,Edward Barin 동국대학교 정보융합기술원 2009 International Journal of Assistive Robotics and Sy Vol.10 No.4

This paper discusses the trial results of a personalised Cardiac Rhythm Management (CRM) system using a smart phone (PDA) and a wireless ECG sensor. The system is used in a trial to record and diagnose abnormal cardiac arrhythmias. This novel approach uses standard mobile phones, off-the-shelf ECG sensors and personalised feedback to the patient when compared to a conventional clinical Holter and event monitor systems. The preliminary results are discussed of an ongoing trial conducted with the Royal North Shore Hospital in Sydney Australia. The results indicate the viability of the system for commercial purposes.

LoRa LPWAN 무선 통신을 활용한 교량 유지관리 시스템 적용성 연구

박진오,박상헌,안승주,박원주,김종훈 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 논문집 Vol.23 No.1

LoRa LPWAN network system uses a license-exempt wireless communication system and implements data measurement through the integrated sensor based on Mems and wireless communication of existing measurement sensors. This system has superior technological / economic superiority using existing network and long distance communication compared to existing wireless measurement system, and secured economical efficiency by minimizing system construction equipment compared to wired measurement system. It is confirmed that the economical efficiency can be reduced by 41% compared to the conventional wired metering system. Since the LoRa LPWAN network system is excellent in terms of maintenance and operation, if installed in many bridges in Korea in the future, it will be developed as an excellent system in the maintenance of bridges. Etc.), and plant field (fire safety, etc.). LoRa LPWAN 네트워크 시스템은 비면허 무선통신을 이용하고, Mems 기반 통합센서를 통하여 Data 계측 및 기존 계측센서의 무선통신을 구현한 시스템이다. 본 시스템은 기존의 무선계측시스템 대비 장거리 통신과 기존망을 활용한 기술적/경제적인 우수성을 갖고 있으며, 유선계측시스템 대비 시스템 구축장비의 최소화로 경제성을 확보하였다. 경제성 검토항목에서 기존 유선계측 시스템 대비 약 41%의 경제적인 절감효과가 가능하다는 것을 확인하였다. 또한 유지관리 및 운영적인 측면에서도 우수하기 때문에 향후 국내에서도 많은 교량에 설치가 된다면, 교량의 유지관리 분야의 우수한 시스템으로 발전되고, 재난(지진 산사태 등), 환경(오염물 측정 및 관리 등), 플랜트 분야(화재 안전 등)에도 폭넓게 사용되길 기대한다.