오늘날, 스마트폰의 보급으로 무선 헬스케어시스템에 대한 연구가 점차 활성화됨에 따라, 손쉽고 간편한 건강관리 시스템에 대한 수요도 증가하고 있다. 그 중에서도 사회문제로 크게 대두되는 독거노인의 고독사 방지를 위한 시스템 개발은 지속적으로 연구되고 있다. 본 논문에서는, 인체에 비침습적이며 무구속으로 생체 신호 계측이 가능한 광용적맥파법(photoplethysmography)으로 독거노인의 맥파를 계측하고 스마트 폰으로 전송하여, 원격진단이 가능한 감시시스템 개발을 목적으로 하였다. 광용적맥파법은 적색광이나 적외선광을 피부에 침투시켜 맥파를 검출하는 방법의 하나로 근래에는 손가락과 같은 인체 말단뿐만이 아니라 손목에서 맥파를 계측하는 연구가 진행되고 있다. 그러나 손목에서 맥파를 계측 시, 광량을 고정시킨 상태에서는 모세혈관의 회전이나 피부의 두께 등에 따라 정확한 맥파 검출을 하기에는 어려움이 있다. 따라서 본 연구에서는 잡음제거에 탁월하며 높은 이득을 가지는 차동 증폭기를 단일전원에서도 동작 가능하도록 개선하고, 인체의 피부 두께에 따른 오차를 줄이기 위해 광량의 침투 범위를 조절하여 다양한 피부 층에서 최적의 센싱을 할 수 있는 알고리즘을 설계하고 그 타당성을 확인하였다.

At this study, we are developing a possible control system through remote monitoring for fire protection in various chemical factory facilities. It's possible to do real time confirmation of a normal operation presence of the various equipment installed in a chemical factory through the internet network at a fire fighting head office, an area fire department and a chemical factory situation room using this remote monitoring control system. When occurring, abnormal operation is the remote monitoring control system, which can check this immediately and notify the situation room administrator. After it was tested using developed remote monitoring control system, the remote monitoring for which the internet network was used confirmed possible.

국민소득 증가에 따라 고급해산물의 수요가 늘어나고 있으며, 어패류 및 해조류를 포함하는 양식어업은 국내어업에 대한 총수입중 50.6%를 차지하고 있는 어가의 주 소득원 중의 하나이다. 최근 국내어장에서 불규칙하게 발생하는 어패류 도난사건의 피해액은 매년 건당 수십만에서 수천만원 이상으로 증가하고 있는 실정이다. 본 연구에서는 국내 영세어가에 적용할 수 있는 양식어장 보호를 위한 레이더 감시시스템의 모델을 제안하고, 시스템의 구축방안을 제시하였다. 국외에서 양식어장보호 감시시스템이 개발된 바가 있지만 구축비용이 고가이므로 국내 영세어가에 적용하기에는 어렵다.

Automated manufacturing systems are applied to shop floors as tools for increase of productivity and quality and the decrease of manufacturing lead times and industry accidents. One of the most important issue of the present day is the application of Internet. The development of Internet technologies makes manufacturing enterprises break spacial barriers between users and shop floors, and collect various field data in remote sites. In this research, an Internet-based remote control system for a small-sized automated storage and retrieval system is developed for the purpose of real-time monitoring and control of automatic production equipment. The developed system has a client-server architecture and sends real-time images of the automated storage and retrieval system to clients by an CCD camera connected to a server.

Nowadays advanced manufacturing companies are trying to find a way to check the performance of their production equipments and plants from remote sites. However, it is hard to monitor the status of machine or to check the performance of the processes because the regional limitation of distributed environment. This paper presents research results in the real time monitoring of machining processes and internet_based operation of machining centers via internet, which is implemented using VRML and JAVA.

This paper describes about the behavior of the Striped mullet (Mugil cephalus) in the setnet by telemetry techniques. The telemetry system consists of a pinger of 50KHz, three omni-directional hydrophones and ultrasonic receivers, a single board computer for the signal processing, two RF transceivers for the data comunication and a personnel computer. The fish tagged the pinger was tracked by the LBL method, and its location was calculated by the hyperbolic method. The fish escaped from sea surface to 7m deep right after release and had been swum near the sea surface after 30 minutes being released. Also, in horizontal movements, the fish stayed long time around the enterance of the square net in setnet, and showed the escaping behavior repeatly. The average speed of the fish was about 0.41m/sec(1.1 times of the body length)

This paper describes about the behavior of the lseraeli carp (Cyprinus cartio. body length 43cm) and the Red seabream (Chrysophrys major. body length 35cm) aquacultured by telemetry techniques. The telemetry system consists of a pinger of 50kHz, three omni-directional hydrophones and ultrasonic receivers, a single board computer for the signal processing, two RF transceivers for the data communication, and a personnel computer. Those fish tagged the pingers were tracked by the LBL method, and its location was calculated by the hyperbolic method. The average speed of the lsraeli carp was about 1.0 times of the body length in a farming water tank (24×24×1m), and the Red seabream 1.3 times of the body length in a farming raft (10×10×5m). A variation of the speed of the lsraeli carp was higher than the other one.

The hardware and the software of the prototype telemtry system to monitor the behavior of the fish are designed. This system consistes of five parts I. e. three omni-directional hydrophones, three ultrasonic receivers, a single board computer for the signal processing, two RF transceivers for the data communication, and a personnel computer. The sensitivty of the hydrophones is -170dB(re 1V/μPa), the gain and the 3dB receiving bandwidth of the ultrasonic receivers are 115dB and 1500Hz respectively, and the sampling period is 33.3μsec in the signal processing part. The positioning error of the system using hyperbolic method is estimated to be less than 0.2m in case that the pinger locates inside of the baselines. The perfomance of the system considering a practical use was examined by numerical simulation and a water tank test of a pinger tracking experiment. In results, the system developed in prototype was confirmed that it could be useful for monitoring the behavior of fish in the limited water area.

본 연구에서는, 모든 유·무인등대와 등·부표를 원격으로 감시하고 제어하기 위한 항로표지 집약관리센터를 구축하기 위한 기반여건 조성작업의 일환으로써, 장비 및 그 지리적인 특수성 때문에 유지·관리에 있어서 기술적 경제적 어려움이 많은 무인 항해 안전관련 시설에 대하여, 상태 확인 및 관리·제어는 물론, 정비시기의 예측 둥 장비의 운영상태를 최고의 상태로 유지할 수 있도록 하는 모듈의 개발에 관하여 논하였으며, 본 연구에서 개발한 모듈을 활용한다면 보다 과학적이고 효율적인 항로표지의 설치, 관리, 운영 및 유지·보수가 가능할 것이다.