• Title/Summary/Keyword: Multi-sensor Tracking

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An Analysis of 2D Positional Accuracy of Human Bodies Detection Using the Movement of Mono-UWB Radar

  • Kiasari, Mohammad Ahangar;Na, Seung You;Kim, Jin Young
    • Journal of Sensor Science and Technology
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    • v.23 no.3
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    • pp.149-157
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    • 2014
  • This paper considers the ability of counting and positioning multi-targets by using a mobile UWB radar device. After a background subtraction process, distinguishing between clutters and human body signals, the position of targets will be computed using weighted Gaussian mixture methods. While computer vision offers many advantages, it has limited performance in poor visibility conditions (e.g., at night, haze, fog or smoke). UWB radar can provide a complementary technology for detecting and tracking humans, particularly in poor visibility or through-wall conditions. As we know, for 2D measurement, one method is the use of at least two receiver antennas. Another method is the use of one mobile radar receiver. This paper tried to investigate the position detection of the stationary human body using the movement of one UWB radar module.

A Study on Multi target tracking using Zigbee Sensor and Particle Filter (Zigbee 센서와 Particle Filter를 이용한 멀티타겟 위치추정 연구)

  • Park, Byungsung;Jung, Chanwoong;Yoo, Jaeyeong;Kim, Hagbae
    • Proceedings of the Korea Information Processing Society Conference
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    • 2009.04a
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    • pp.1098-1101
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    • 2009
  • 최근 센서 기술이 발전함에 따라 센서들의 유비쿼터스 환경에서의 활용방법에 대한 연구가 진행되고 있다. 현재 존재하는 센서들 중 Zigbee 센서는 저전력, 초소형 등의 특징을 가지고 센서들이 통신을 하는 센서로써 유지비용과 이동성에 있어서 다른 센서들보다 성능이 우위에 있다. Zigbee 센서는 신호를 Broadcasting하여 다른 Zigbee 센서와 통신을 하게 된다. 이때 이 신호의 세기를 나타내는 RSS와 Triangulation을 통하여 위치를 파악할 수 있다. 그리고 이 결과를 Particle Filter 알고리즘을 통하여 위치추정의 정확도를 높일 수 있다. 또한 유비쿼터스 환경에서의 활용 가능성 파악을 위하여 실제 집 환경의 Testbed를 구축하여 시뮬레이션을 진행하였다. 멀티 타겟의 위치 추정을 위하여 Zigbee 센서의 Time Cycle 조정을 통하여 Particle Filter 알고리즘을 사용하여 위치 추정 오차를 시뮬레이션으로 성능평가를 하였고 결과를 통하여 멀티 타겟의 경로를 분석하였다.

Designation of an Application Model for Tag-Position Tracking in the RFID UHF Band (RFID UHF 대역의 태그 위치추적 응용모델 설계)

  • Shin, Kyung-Chul;Kim, Woo-Sung;Oh, Yong-Sun
    • Proceedings of the Korea Contents Association Conference
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    • 2004.11a
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    • pp.377-383
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    • 2004
  • In this paper, we propose an application model of RFID that needs not be worried about battery degradation problems and offers convenience of hand-carry. We design the RFID application model which can track medium distance target RFID Tag and detect the signal difference between multi-detectors in a room area using 900MHz frequency band. In the case of multi-ID Tag in one detector, we approach TDMA scheme.

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Spatiotemporal Routing Analysis for Emergency Response in Indoor Space

  • Lee, Jiyeong;Kwan, Mei-Po
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.32 no.6
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    • pp.637-650
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    • 2014
  • Geospatial research on emergency response in multi-level micro-spatial environments (e.g., multi-story buildings) that aims at understanding and analyzing human movements at the micro level has increased considerably since 9/11. Past research has shown that reducing the time rescuers needed to reach a disaster site within a building (e.g., a particular room) can have a significant impact on evacuation and rescue outcomes in this kind of disaster situations. With the purpose developing emergency response systems that are capable of using complex real-time geospatial information to generate fast-changing scenarios, this study develops a Spatiotemporal Optimal Route Algorithm (SORA) for guiding rescuers to move quickly from various entrances of a building to the disaster site (room) within the building. It identifies the optimal route and building evacuation bottlenecks within the network in real-time emergency situations. It is integrated with a Ubiquitous Sensor Network (USN) based tracking system in order to monitor dynamic geospatial entities, including the dynamic capacities and flow rates of hallways per time period. Because of the limited scope of this study, the simulated data were used to implement the SORA and evaluate its effectiveness for performing 3D topological analysis. The study shows that capabilities to take into account detailed dynamic geospatial data about emergency situations, including changes in evacuation status over time, are essential for emergency response systems.

Development of High-Speed Real-Time Signal Processing Unit for Small Radio Frequency Tracking Radar Using TMS320C6678 (TMS320C6678을 적용한 소형 Radio Frequency 추적레이다용 고속 실시간 신호처리기 설계)

  • Kim, Hong-Rak;Hyun, Hyo-Young;Kim, Younjin;Woo, Seonkeol;Kim, Gwanghee
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.21 no.5
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    • pp.11-18
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    • 2021
  • The small radio frequency tracking radar is a tracking system with a radio frequency sensor that identifies a target through all-weather radio frequency signal processing for a target and searches, detects and tracks the target for the major target. In this paper, we describe the development of a board equipped with TMS320C6678 and XILINX FPGA (Field Programmable Gate Array), a high-speed multi-core DSP that acquires target information through all-weather radio frequency and identifies a target through real-time signal processing. We propose DSP-FPGA combination architecture for DSP and FPGA selection and signal processing, and also explain the design of SRIO for high-speed data transmission.

AUTOMATIC MULTITORCH WELDING SYSTEM WITH HIGH SPEED

  • Moon, H.S;Kim, J.S.;Jung, M.Y.;Kweon, H.J.;Kim, H.S.;Youn, J.G.
    • Proceedings of the KWS Conference
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    • 2002.10a
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    • pp.320-323
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    • 2002
  • This paper presents a new generation of system for pressure vessel and shipbuilding. Typical pressure vessel and ship building weld joint preparations are either traditional V, butt, fillet grooves or have narrow or semi narrow gap profiles. The fillet and U groove are prevalently used in heavy industries and shipbuilding to melt and join the parts. Since the wall thickness can be up to 6" or greater, welds must be made in many layers, each layer containing several passes. However, the welding time for the conventional processes such as SAW(Submerged Arc Welding) and FCAW(Flux Cored Arc Welding) can be many hours. Although SAW and FCAW are normally a mechanized process, pressure vessel and ship structures welding up to now have usually been controlled by a full time operator. The operator has typically been responsible for positioning each individual weld run, for setting weld process parameters, for maintaining flux and wire levels, for removing slag and so on. The aim of the system is to develop a high speed welding system with multitorch for increasing the production speed on the line and to remove the need for the operator so that the system can run automatically for the complete multi-torch multi-layer weld. To achieve this, a laser vision sensor, a rotating torch and an image processing algorithm have been made. Also, the multitorch welding system can be applicable for the fine grained steel because of the high welding speed and lower heat input compare to a conventional welding process.

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Position Recognition and User Identification System Using Signal Strength Map in Home Healthcare Based on Wireless Sensor Networks (WSNs) (무선 센서네트워크 기반 신호강도 맵을 이용한 재택형 위치인식 및 사용자 식별 시스템)

  • Yang, Yong-Ju;Lee, Jung-Hoon;Song, Sang-Ha;Yoon, Young-Ro
    • Journal of Biomedical Engineering Research
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    • v.28 no.4
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    • pp.494-502
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    • 2007
  • Ubiquitous location based services (u-LBS) will be interested to an important services. They can easily recognize object position at anytime, anywhere. At present, many researchers are making a study of the position recognition and tracking. This paper consists of postion recognition and user identification system. The position recognition is based on location under services (LBS) using a signal strength map, a database is previously made use of empirical measured received signal strength indicator (RSSI). The user identification system automatically controls instruments which is located in home. Moreover users are able to measures body signal freely. We implemented the multi-hop routing method using the Star-Mesh networks. Also, we use the sensor devices which are satisfied with the IEEE 802.15.4 specification. The used devices are the Nano-24 modules in Octacomm Co. Ltd. A RSSI is very important factor in position recognition analysis. It makes use of the way that decides position recognition and user identification in narrow indoor space. In experiments, we can analyze properties of the RSSI, draw the parameter about position recognition. The experimental result is that RSSI value is attenuated according to increasing distances. It also derives property of the radio frequency (RF) signal. Moreover, we express the monitoring program using the Microsoft C#. Finally, the proposed methods are expected to protect a sudden death and an accident in home.

Study of an Optical Goniometer Using a Multi-Photodiode Sensor

  • Kim, Ji-Sun;Kim, A-Hee;Oh, Han-Byeol;Kim, Jun-Sik;Goh, Bong-Jun;Lee, Eun-Suk;Choi, Ju-Hyeon;Baek, Jin-Young;Jun, Jae-Hoon
    • Journal of the Optical Society of Korea
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    • v.20 no.1
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    • pp.22-28
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    • 2016
  • The monitoring and measurement of the motion of a human joint is very important in screening for degenerative brain diseases and tracking the rehabilitation process. Since there are various medical fields to benefit from angular motion measurement, the necessity for monitoring of human joint movement is increasing. In this study, the optical sensor is composed of a light emission unit with a red LED and an optical fiber, and a reception unit with an arrangement of three photodiodes. The angular detection range was widened with the use of multiple photodiodes and the developed algorithm. The result will be useful for designing an effective angular sensor with low cost and small size.

RealBook: A Tangible Electronic Book Based on the Interface of TouchFace-V (RealBook: TouchFace-V 인터페이스 기반 실감형 전자책)

  • Song, Dae-Hyeon;Bae, Ki-Tae;Lee, Chil-Woo
    • The Journal of the Korea Contents Association
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    • v.13 no.12
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    • pp.551-559
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    • 2013
  • In this paper, we proposed a tangible RealBook based on the interface of TouchFace-V which is able to recognize multi-touch and hand gesture. The TouchFace-V is applied projection technology on a flat surface such as table, without constraint of space. The system's configuration is addressed installation, calibration, and portability issues that are most existing front-projected vision-based tabletop display. It can provide hand touch and gesture applying computer vision by adopting tracking technology without sensor and traditional input device. The RealBook deals with the combination of each advantage of analog sensibility on texts and multimedia effects of e-book. Also, it provides digitally created stories that would differ in experiences and environments with interacting users' choices on the interface of the book. We proposed e-book that is new concept of electronic book; named RealBook, different from existing and TouchFace-V interface, which can provide more direct viewing, natural and intuitive interactions with hand touch and gesture.

Design of a Triple-input Energy Harvesting Circuit with MPPT Control (MPPT 제어기능을 갖는 삼중입력 에너지 하베스팅 회로 설계)

  • Yoon, Eun-Jung;Park, Jong-Tae;Yu, Chong-Gun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2013.10a
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    • pp.346-349
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    • 2013
  • This paper describes a triple-input energy harvesting circuit using solar, vibration and thermoelectric energy with MPPT(Maximum Power Point Tracking) control. The designed circuit employs MPPT control to harvest maximum power available from a solar cell, PZT vibration element and thermoelectric generator. The harvested energies are simultaneously combined and stored in a storage capacitor, and then managed and transferred into a sensor node by PMU(Power Management Unit). MPPT controls are implemented using the linear relation between the open-circuit voltage of an energy transducer and its MPP(Maximum Power Point) voltage. The proposed circuit is designed in a CMOS 0.18um technology and its functionality has been verified through extensive simulations. The designed chip occupies $945{\mu}m{\times}995{\mu}m$.

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