• Title/Summary/Keyword: real-time location

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A study on the prediction method of the real fault distance using probability to the relay data of transmission line fault location (송전선로 거리표정치에 대한 실 고장거리의 확률적 예측방안)

  • Lee, Y.H.;Back, D.H.;Jang, S.H.
    • Proceedings of the KIEE Conference
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    • 2006.07a
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    • pp.10-11
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    • 2006
  • The fault location is obtained from the distance relay that detects the fault of the transmission line. In this time, transmission line crews track down the fault location and the reasons. However, because of having error at the fault location of the distance relay, there is a discordance between real and obtained fault location. As this reason, the inspection time for finding fault location can be longer. In this paper, we proposed the statistical (regression) analysis method based on each type of relay's the historical fault location data and the real fault distance data to improve the problems. With finding the regression equation based on the regression analysis, and putting the relay fault location into that equation, the real fault distance is calculated. As a result of the Prediction fault location, the inspection time of transmission line can be reduced.

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Identifying unsafe habits of construction workers based on real-time location

  • Li, Heng;Chan, Greg
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.10-14
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    • 2015
  • Unsafe behavior is one of the major causes of construction accidents. Managing the behavior of workers in real-time is difficult and requires huge manpower. In this paper, a new real-time locating framework is proposed to improve safety management by collecting and analyzing data describing the behavior of workers to identify habits that may lead to accidents. The aim of the study is to identify working habits of workers based on their location history. Location data is used to compare with that of other workers and equipment. The results indicate that the reuse of real-time location data can provide extra safety information for safety management and that the proposed system has the potential to prevent struck-by accidents and caught-in between accidents by predicting unwanted interaction between workers and equipment. This adds to current research aimed at automating construction safety to the point where the continuous monitoring, managing and protection of site workers on site is possible.

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A Real Time Location Based IoT Messaging System using MQTT (MQTT 활용 실시간 위치 기반 IoT 메시징 시스템)

  • Jung, In-Hwan
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.18 no.4
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    • pp.27-36
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    • 2018
  • In this paper, we design and implement a real time IoT messaging system that can collect location information of moving vehicles and pedestrians in real time using MQTT protocol and provides location based information service in administrative area. We implemented MQTT based IoT device for vehicle location information collection and communication and MQTT based smartphone application for pedestrian location information service. IoT clients can send messages to the server in administrative units by using the MQTT Topic which is equal to administrative names. The SLIMS (Seoul Location based IoT Messaging System) implemented in this study is able to analyze the real time traffic volume of pedestrians and vehicles by tracking clients. It also can deliver messages to clients based on coordinate range. SLIMS can be used as a real-time location-based information service for large-scale IoT devices such as real-time flow population and vehicle traffic analysis and location-based message delivery.

A DSP Implementation of Subband Sound Localization System

  • Park, Kyusik
    • The Journal of the Acoustical Society of Korea
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    • v.20 no.4E
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    • pp.52-60
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    • 2001
  • This paper describes real time implementation of subband sound localization system on a floating-point DSP TI TMS320C31. The system determines two dimensional location of an active speaker in a closed room environment with real noise presents. The system consists of an two microphone array connected to TI DSP hosted by PC. The implemented sound localization algorithm is Subband CPSP which is an improved version of traditional CPSP (Cross-Power Spectrum Phase) method. The algorithm first split the input speech signal into arbitrary number of subband using subband filter banks and calculate the CPSP in each subband. It then averages out the CPSP results on each subband and compute a source location estimate. The proposed algorithm has an advantage over CPSP such that it minimize the overall estimation error in source location by limiting the specific band dominant noise to that subband. As a result, it makes possible to set up a robust real time sound localization system. For real time simulation, the input speech is captured using two microphone and digitized by the DSP at sampling rate 8192 hz, 16 bit/sample. The source location is then estimated at once per second to satisfy real-time computational constraints. The performance of the proposed system is confirmed by several real time simulation of the speech at a distance of 1m, 2m, 3m with various speech source locations and it shows over 5% accuracy improvement for the source location estimation.

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A Study on Safety System for Blasting Workers using Real Time Location System in the Shipyard (선박용 블라스팅 셀 내에서의 실시간 위치 추적 기술을 이용한 작업자 안전 시스템에 대한 연구)

  • Yun, Won-Jun;Ro, Young-Shic;Cho, Sang-Bock
    • Journal of the Society of Naval Architects of Korea
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    • v.47 no.6
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    • pp.836-842
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    • 2010
  • Safety system including location monitoring system for blasting workers was studied. Positioning performance of the location monitoring system was highly dependent on communication protocol and the number of access points in the blasting cell. RTLS(Real Time Location System) is an important technology to develop the location information of workers and variously used to enhance workers safety. Location monitoring system with Cell-ID and RSSI wireless communication technology was verified to have a proper positioning performance for the steel block application.

Implementation of UWB Indoor Positioning and Real-time Remote Control System for Disaster Monitoring based on Digital Twin (재난 감시 디지털 트윈을 위한 UWB 실내 측위 및 실시간 원격제어 시스템 구현)

  • Yu, Da-Song;Kim, Won-Suk
    • Journal of Korea Multimedia Society
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    • v.24 no.12
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    • pp.1682-1692
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    • 2021
  • Digital Twin, one of the core technologies of the Fourth Industrial Revolution, is attracting attention as a very suitable technology for disaster monitoring such as fires and earthquakes. In this paper, we implement a system equipped with UWB RTLS(Ultra-Wideband Real Time Location System), real-time remote control, and video streaming, which are element technologies for disaster monitoring digital twin. Since the proposed system structure is based on a cloud server, the actual location of the UWB indoor positioning-based client is transmitted to the user device in real time and stored on the cloud server for statistical and data analysis. In addition, we demonstrate through experiments that outliers occurs when the value of RSSI(Received Signal Strength Indicator) decreases due to communication collisions between UWB Tags, and propose an RSSI outlier correction algorithm to solve this problem.

RTLS Technologic Application for Ubiquitous Port Management Efficiency (유비쿼터스 항만 운영 효율화를 위한 RTLS 기술 적용)

  • Kwon, Soon-Ryang;Jung, Kwang-Ju;Park, Sang-Hoon;Kim, Joeng-Hoon
    • Journal of KIISE:Computing Practices and Letters
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    • v.13 no.6
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    • pp.371-377
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    • 2007
  • In this paper, we propose the effective operating device in the container freight station by applying the RTLS (Real Time Location System) that provides information on the container's location in real time so that the performance of the port operating system can be improved. For this, we proposed the improved dual cycling method made with the new application of two types of container's location & yard tractor's location information. we applied the RTLS to the container freight station to send the container location data to the operating system in real time; we designed the data on the Yard Tractor's location to be received via the GPS receiver and then be sent to the operating system in real time via the CDMA module. According to the analysis and evaluation of the performance of the proposed method, up to 24% of performance improvement was shown compared with the existing methods, in aspect of evaluation of work time, work time deviation and performance. Therefore, we proved that the RTLS and the GPS receiver are essential elements for efficient port operation.

Design of Vehicle Location Tracking System using Mobile Interface

  • Chung, Ji-Moon;Choi, Sung;Ryu, Keun-Ho
    • 한국디지털정책학회:학술대회논문집
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    • 2004.11a
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    • pp.185-202
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    • 2004
  • Recent development in wireless computing and GPS technology cause the active development in the application system of location information in real-time environment such as transportation vehicle management, air traffic control and location based system. Especially, study about vehicle location tracking system, which monitors the vehicle's position in a control center, is appeared to be a representative application system. However, the current vehicle location tracking system can not provide vehicle position information that is not stored in a database at a specific time to users. We designed a vehicle location tracking system that could track vehicle location using mobile interface such as PDA. The proposed system consist of a vehicle location retrieving server and a mobile interface. It is provide not only the moving vehicle's current location but also the position at a past and future time which is not stored in database for users.

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A Implementation of Real-Time IP Address-Location Mapping System for LBS on High-Speed Internet (초고속 인터넷상에서 위치기반 서비스를 위한 실시간 IP/위치 매핑 시스템 구현)

  • Kim, Min-Kyung;Baek, Gyu-Tae
    • 한국정보통신설비학회:학술대회논문집
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    • 2005.08a
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    • pp.10-15
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    • 2005
  • In the area of mobile communication, Location Based Services (LBS) using the location of mobile terminal to provide their services are rapidly spreading as communication network and terminal evolves. Despite the LBS are highly demanded in high speed internet area, the services are very rare due to the difficulty locating terminals. In this paper, we propose the method to locate terminals in real time and describe its implementation system. The proposed system is designed to collect the information in real time for more than a terminal connecting internet. And, the system shows high performancecollecting and generating location information through simulation tests.

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Design and Performance Analysis of Real-Time Hybrid Position Tracking Service System using IEEE 802.15.4/4a in the Multi-Floor Building (복합환경에서 IEEE 802.15.4/4a를 이용한 하이브리드 실시간 위치추적 서비스 시스템 설계 및 성능분석)

  • Kim, Myung-Hwan;Chung, Yeong-Jee
    • Journal of Information Technology Services
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    • v.10 no.1
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    • pp.105-116
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    • 2011
  • With recent spotlight on the, uniquitous computing technology, the need for object of indentification and location infrastructure has increased. Such GPS technolgy must utilize IEEE 802.15.4 Zigbee used for existing wireless sensor network infra as a basice element for user's context-awareness in a uniquitous environement, for effectiveness.Such real-time GPS service is provided in the internal environment where the user would actually are and most high-rise buildlings apply. Underthe assumption, the real-time GPS technology is seperated by each floor, and signals do not get transmitted to other floors, the application on one floor within the high-rise buildling was conducted. This study intends to suggest a floor detection algorithm using IEE 802.15.3/Zigbee's RSSI which supports the accuracy within a couple of meters for the user's the movement between the floors in high-rise buildings in a complex environment. It proposes an floor detection algorithm using IEEE 802.15.4/Zigbee's RSSI which provides accuracy within a radius of few meters for the users movement between the floors for real-time location tracking within high-rise building in a cmoplex environment. Furthermore, for more accurate real-time location tracking, it suggests an algorithm for real-time location tracking using IEEE 802.15.4a/Zigbee's CSS technology based on triangulation. Based on the suggested algorithm, it designs a hybrid real-time location tracking service system in a high-rise buildling and test its functions.