• 산업기술연구
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• 제27권B호
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• pp.37-42
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• 2007

A mobile ad hoc network (MANET) is a kind of wireless ad hoc network. It is a self-configuring network of mobile nodes connected by wireless links. Infostation is a lower cost and low power system that provides very high bit rate with limited coverage. In this study, we propose search and rescue system that combines MANET of climbers with Infostations. A climber shares location information of climbers with other climbers while climbing, and delivers the information to Infostations. This system is an intermittent network due to the mobility of nodes. From the system, we can track the locations of missing climbers. Ultimately, proposed system achieves low cost and reduces memory requirement using Infestations. We also analyze the performance of the proposed system by simulation. From the performance analysis results, we expect that the proposed system will be very useful to early detect climbers' locations in emergency situations in Korea mountain areas.

• 한국측량학회지
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• 제37권5호
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• pp.293-302
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• 2019

In mountain accident events, it is important for the search team commander to determine the search area in order to secure the Golden Time. Within this period, assistance and treatment to the concerned individual will most likely prevent further injuries and harm. This paper proposes a method to determine the search priority area based on missing persons behavior and missing persons incidents statistics. GIS (Geographic Information System) and MCDM (Multi Criteria Decision Making) are integrated by applying WLC (Weighted Linear Combination) techniques. Missing persons were classified into five types, and their behavioral characteristics were analyzed to extract seven geographic analysis factors. Next, index values were set up for each missing person and element according to the behavioral characteristics, and the raster data generated by multiplying the weight of each element are superimposed to define models to select search priority areas, where each weight is calculated from the AHP (Analytical Hierarchy Process) through a pairwise comparison method obtained from search operation experts. Finally, the model generated in this study was applied to a missing person case through a virtual missing scenario, the priority area was selected, and the behavioral characteristics and topographical characteristics of the missing persons were compared with the selected area. The resulting analysis results were verified by mountain rescue experts as 'appropriate' in terms of the behavior analysis, analysis factor extraction, experimental process, and results for the missing persons.

• Journal of Construction Engineering and Project Management
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• 제1권3호
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• pp.45-51
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• 2011

During disaster response, prioritization of limited resources is one of the most important but challenging tasks. At the same time, it is imperative to timely provide to the rescuers with the adequate heavy equipment to facilitate lifesaving operations. However, supply of high demand equipment is usually insufficient during the initial phase of disaster response, challenging lifesaving operations. At the same time, resources outside of the disaster affected zone converge into the area to assist the response efforts, which is the effect of convergence that often made resource coordination challenging in large scale disasters. Meanwhile, the initial condition of the disaster is usually best known by civilians already at the area before and during impact of the disaster. The knowledge of the civilians is not always received and considered by the responding organizations. With the help of these civilians, critical information such as victim location, infrastructure damage, and risk condition could be better know before any response actions are taken. To efficiently collect information and utilize the converging resources, this paper proposes a geospatial information repository for initial condition reporting and update to guide search and rescue operations and deployment of equipment with safety considerations for the rescuers in large scale disaster response scenarios.

• ETRI Journal
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• 제37권2호
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• pp.262-272
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• 2015

In particular, for a practical mobile robot team to perform such a task as that of carrying out a search and rescue mission in a disaster area, the network connectivity and localization have to be guaranteed even in an environment where the network infrastructure is destroyed or a Global Positioning System is unavailable. This paper proposes the new collective intelligence network management architecture of multiple mobile robots supporting seamless network connectivity and cooperative localization. The proposed architecture includes a resource manager that makes the robots move around and not disconnect from the network link by considering the strength of the network signal and link quality. The location manager in the architecture supports localizing robots seamlessly by finding the relative locations of the robots as they move from a global outdoor environment to a local indoor position. The proposed schemes assuring network connectivity and localization were validated through numerical simulations and applied to a search and rescue robot team.

• 한국국방경영분석학회지
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• 제34권3호
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• pp.67-77
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• 2008

21세기 신 해양시대를 맞아 해양활동 산업비중이 급격히 증가하고 있으며, 해상사고 또한 대규모 인명 및 재난사고로 이어지고 있어 이에 대한 안전관리체계의 중요성이 강조되고 있다. 본 연구에서는 탐색 및 구조작전의 핵심인 탐색범위의 결정, 탐색세력의 결정, 탐색시간의 결정 3가지 분야에 대하여 의사결정 지원을 위한 이론적 기준을 제시하였다. 이를 위해 해양사고 시 현행 탐색 및 구조작전 절차상의 문제점을 파악해 보고, 선행 연구결과와 해상탐지이론을 적용하여 합리적 기준을 설정함으로써 탐색 및 구조작전 수행의 이론적 근거를 마련하였다.

• 한국위성정보통신학회논문지
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• 제9권4호
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• pp.117-126
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• 2014

COSPAS-SARSAT 탐색구조 시스템을 이용하여 조난을 당한 비행기, 선박 혹은 개인은 구조 기관에 구조신호를 송신함으로써 구조를 받을 수 있다. 특히 이러한 시스템이 전시에 사용될 경우, 조난신호의 노출은 조난자의 위험과 지원 자원의 낭비를 초래할 수 있다. 본 논문에서는 COSPAS-SARSAT을 탐색구조 신호를 보호하기 위한 개선된 방안을 제안한다. 또한 갈릴레오 시스템의 탐색구조 회신링크를 이용하여 조난자와 구조 기관간의 안정된 보안 체계를 유지할 수 있는 프로토콜을 제안한다.

• Journal of Positioning, Navigation, and Timing
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• 제8권3호
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• pp.119-127
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• 2019

COsmicheskaya Sisteyama Poiska Avariynich Sudov Search and Rescue Satellite-Aided Tracking (COSPAS-SARSAT) is an international communication support program to perform search and rescue (SAR) operations in emergency situations by using satellite signals relayed from a beacon. The legacy COSPAS-SARSAT was originally composed of low altitude and geostationary Earth orbit satellites; thus, a limited number of directional dish antennas was sufficient to cover the limited number of visible satellites at the local user terminal. However, the second generation COSPAS-SARSAT newly added the medium Earth orbit satellites, e.g., Global Navigation Satellite Systems (GNSS) to the existing system, so that the number of visible satellites increase dramatically, and the system upgrade to cover all the visible satellites is foreseen. The additional use of planned Korea Positioning System (KPS) to existing GNSS is envisaged to provide a better performance of their SAR service. This paper presents the benefits of the additional use of KPS together with the phased array antennas at the local user terminal of the COSPAS-SARSAT. This is to effectively response to the increase of the number of visible satellites. Numerical simulation is included to evaluate the performance improvement of COSPAS-SARSAT in terms of the number of visible satellites, geometry between satellites and user, and position estimation accuracy.

• 로봇학회논문지
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• 제11권4호
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• pp.235-241
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• 2016

Dual arm manipulators have been developed for the entertainment purpose such as humanoid type or the industrial application such as automatic assembly. Nowadays, there are some issues for applying the dual arm robot system into the various fields. Especially, robots can substitute human and perform the dangerous activity such as search and rescue in the battle field or disaster. In the paper, the dual arm manipulator which can be adapted to the rescue robot with the mobile platform was developed. The kinematic design was proposed for the rescue activity and the required specification was determined through the kinematic analysis and the dynamic analysis in the various conditions. The proposed dual arm manipulator was manufactured based on the vibration analysis result and its performance was proved by the experiment.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 춘계학술대회
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• pp.688-689
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• 2022

본 논문은 익수 사고로 부터 요구조자를 신속히 구출하기 위한 모션감지 및 열화상 카메라를 탑재한 AI드론의 개발을 제안하고자 한다. 현재 익수사고가 발생하면, 많은 인력이 투입되어, 수색작전을 펼치는 등, 사람이 직접 요구조자를 찾아야만 한다. 이러한 과정에서 소요되는 시간이 너무 길고, 특히 야간수색은 사람이 직접하기에는 더욱더 힘든 부분이 많아 인명구조에 있어서 빠른 구조가 어려운 것이 현실적인 문제이다. 이러한 상황을 해결하고자 AI드론을 사용하려한다.

• 문화기술의 융합
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• 제9권5호
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• pp.159-165
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• 2023

이 연구는 내수면의 수난사고 중에서도 수중수색 부분에 한정하고, 수중 5m에서 5가지 수중탐색 방법과 인명구조 시간을 분석하였다. 실험대상자는 10명으로. 반원 탐색은 259초로 가장 길었고, 변형된 왕복 탐색 방법은 78.60초로, 평균 180.04초의 유의미한 차이를 보였다. 실험대상자 B, D는 수중탐색 평균 시간이 각각, 199초, 202초로 비슷한 수치를 나타내었다. 실험대상자 C는 수중탐색 평균 시간이 209초로 유의하게 높게 나타났다. 그 이유는 수중 시계의 불량으로 인한 불안감 가중 및 과도한 긴장에서 기인한 것으로 보인다. 실험대상자 A는 수중수색 시간이 187초로 유의하게 낮게 나타났다. 그 이유는 E의 경력이 실험대상자 중 가장 많고, 시계가 불량한 한강에서의 잠수 경험이 풍부하여 나타난 결과로 보인다. 편리성은 반원 탐색은 6~7로 낮게, 변형된 왕복 탐색이 8~9로 높은 수치를 나타내었다. 시계가 불량한 한강에서의 수중탐색 방법으로 가장 적합한 구조 방법은 변형된 왕복 탐색 방법으로 판단된다.