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차량과 노변기지국간 전용 무선 데이터 통신을 이용한 차량위치 추적 시스템
홍승범,이정구,나원,백중환,최은석,황병원 한국항행학회 2000 韓國航行學會論文誌 Vol.4 No.2
본 논문에서는 DSRC(Dedicated Short Range Communication) 시스템을 이용하여 이동하는 차량에 탑재된 단말장치(OBE : On-Board Equipment)와 도로변에 설치된 기지국 장치(RSE : Road-Side Equipment) 사이에 5.8GHz대 ISM대역의 주파수를 사용한 무선패킷통신방식을 통한 차량위치 추적 시스템을 제안한다. 기존의 차량 위치 추적 방식은 차량위치를 파악하여 차량위치를 센터와 사용자에게 전송하는 무선 통신방식으로 단순한 센서만 사용되었지만, 본 시스템은 차량의 위치, 통관, 차량간 통신, 교통정보 수집 및 분배 등의 다양한 업무를 수행하도록 개발되었다. 또한, 빠른 처리를 위해 통신 계층 중 물리, 데이터링크, 응용계층으로 설계하여, 기존의 무선 통신방식 및 센서를 대처할 새로운 기술로 제안한다. In this paper, we propose an AVLS(Automatic Vehicle Location System) using the DSRC(Dedicated Short Range Communication) which adopts a radio communication tool between RSE(Road-Side Equipment) and OBE(On-Board Equipment) on a vehicle and uses the ISM bandwidth of 5.8GHz radio frequency. Typical AVLS uses the sensors for detecting the vehicle, but the DSRC system is developed for supporting various services such as the position of vehicle, clearance, vehicle to vehicle communication, collection and distributions of traffic and road information. Also, for fast processing, we design three-layer configuration of physical(L1), data link(L2), and application layer (L7), which simplifies the seven-layer configuration, We suggest the proposed system as a new technology for replacement of typical wireless communication system and sensors for AVLS.
홍승범,지민석,김영인,홍교영,천기진 한국항공운항학회 2009 한국항공운항학회지 Vol.17 No.3
We proposed the method of avionics integrated architecture using high-speed fiber optic bus. Typically, data bus of aircraft consists of electronic and optic data transmission method. Avionics systems are difficult to operate the electronic data transmission method for the high speed data processing, synchronization and interconnection between flight control system and flight management system efficiently. In this paper, it is known to look into the problem of data bus and the advanced trend in avionics systems, and propose the appropriate data bus of the advanced avionics systems.
홍승범,이규호 한국정보통신학회 2022 Journal of information and communication convergen Vol.20 No.4
In this study, we propose a technological system designed to provide machine vision-based automatic inspection and autonomous operation services for an entire process related to product inspection in wire harness manufacturing. The smart factory paradigm is a valuable and necessary goal, small companies may encounter steep barriers to entry. Therefore, the best approach is to develop towards this approach gradually in stages starting with the relatively simple improvement to manufacturing processes, such as replacing manual quality assurance stages with machine vision-based inspection. In this study, we consider design issues of a system based on the proposed technology and describe an experimental implementation. In addition, we evaluated the implementation of the proposed technology. The test results show that the adoption of the proposed machine vision-based automatic inspection and operation service system for multi-wire harness production may be considered justified, and the effectiveness of the proposed technology was verified.
천공형 티타늄막을 이용한 골유도재생술 시 수종의 골이식재가 골재생에 미치는 영향
홍승범,권영혁,박준봉,허익,정종혁,Hong, Seung-Bum,Kwon, Young-Hyuk,Park, Joon-Bong,Herr, Yeek,Chung, Jong-Hyuk 대한치주과학회 2006 Journal of Periodontal & Implant Science Vol.36 No.1
The purpose of the present study was to evaluate the effect of bone graft materials including deproteinized bovine bone(DBB), demineralized freeze-dried bone(DFDB), freeze-dried bone(FDB) on bone formation in guided bone regeneration using perforated titanium membrane(TM). 16 adult male rabbits(mean BW 2kg) were used in this study and 4 rabbits allotted to each test group. Intramarrow penetration(diameter 6.5mm) was done with round carbide bur on calvaria to promote blood supply and clot formation in the wound area. The test groups were devided into 4 groups as follows: TM only(test 1), TM +DBB(test 2), TM +DFDB(test 3), TM +FDB(test 4). Perforated titanium membrane was contoured in rectangular parallelepiped shape(0.5mm pore diameter, 10mm in one side, 2mm in inner height), filled the each graft material and placed on the decorticated carvaria. Perforated titanium membrane was fixed with resorbable suture materials. The animals were sacrificed at 2, 8 weeks after the surgery. Non-decalcified preparations were routinely processed for histologic analysis. The results of this study were as follows: 1. Perforated titanium membrane was biocompatible. 2. Perforated titanium membrane had capability of maintaining the space during the healing period but invasion of soft tissue through the perforations of titanium membrane decreased the space available for bone formation. 3. In test 1 group without bone graft material, the amount of bone formation and bone maturation was better than other test groups. 4. Among the graft materials, the effect of freeze-dried bone on bone formation was best. 5. In the test groups using deproteinized bovine bone, demineralized freeze-dried bone, bone formation was a little. The spacemaking capability of the membrane may be crucial for bone formation. The combined treatment with the perforated titanium membrane and deproteinized bovine bone or demineralized freeze-dried bone failed to demonstrate any added effect in the bone formation. Minimization of size and numbers of perforations of titanium membrane or use of occlusive titanium membrane might be effective to acquire predictable results in the vertical bone formation.