스마트 자동차의 BSD 검지를 위한 추적알고리즘에 관한 연구

김완태 (사)디지털산업정보학회 2023 디지털산업정보학회논문지 Vol.19 No.2

Recently, Sensor technologies are emerging to prevent traffic accidents and support safe driving in complex environments where human perception may be limited. The UWS is a technology that uses an ultrasonic sensor to detect objects at short distances. While it has the advantage of being simple to use, it also has the disadvantage of having a limited detection distance. The LDWS, on the other hand, is a technology that uses front image processing to detect lane departure and ensure the safety of the driving path. However, it may not be sufficient for determining the driving environment around the vehicle. To overcome these limitations, a system that utilizes FMCW radar is being used. The BSD radar system using FMCW continuously emits signals while driving, and the emitted signals bounce off nearby objects and return to the radar. The key technologies involved in designing the BSD radar system are tracking algorithms for detecting the surrounding situation of the vehicle. This paper presents a tracking algorithm for designing a BSD radar system, while explaining the principles of FMCW radar technology and signal types. Additionally, this paper presents the target tracking procedure and target filter to design an accurate tracking system and performance is verified through simulation.

다단계 흡착장치를 이용한 인공제오라이트 펠렛의 암모니아 제거 특성

김완태,이성오,윤연흠,신방섭 한국자원리싸이클링학회 1998 資源 리싸이클링 Vol.7 No.1

본 연구에서는 석탄회로부터 물리화학적인 방법에 의해 제오라이트 펠렛을 제조하고 이를 이용하여 폐수중의 암모니아에 대한 흡착 제거능 및 그 제거 특성을 조사하였다. 암모니아 흡착 실험은 다단계 흡착방식으로 흡착용 시료는 본 실험에서 제조한 제오라이트 펠렛과 천연 제오라이트 2종을 흡착 제거에 대한 비교실험시료로 사용하였다. 흡착실험은 그 단계를 일정 시간동안에 흡착이 일어나기 시작하는 초기, 흡착이 진행되는 중기, 흡착이 종료되는 말기로 나누어 각 흡착의 단계 및 사용하는 컬럼의 수에 따른 흡착량의 변화 등을 조사하였다. 흡착이 종료된 후의 흡착 효율은 천연 제오라이트의 경우 64.5%와 78.5%였으며, 본 실험에서 제조한 제오라이트 펠렛은 80.5%로 다른 시료에 비해 많은 양의 암모니아를 흡착하였다. 처리수의 암모니아 농도에 따른 흡착량의 변화는 암모니아의 농도가 증가할수록 흡착량도 따라서 증가하였다. 처리수의 pH변화에 따른 흡착량의 변화는 pH가 산성영역에 서 보다는 중성이나 알칼리 영역에서 보다 많은 양의 암모니아를 흡착하는 경향을 보였다. The mdy is to investigate the capanty and charactoristics of ammonia removal from waste water by artificial zeolite pellet which was synlhesized physicochemically using fly ash. A multi-stage adsorption method was adapted anrl the zeolile pellct as well as two types of natural zeolites are used for adsorption tests of ammonia io order to compare he adsorption capabilities with one anothcr. The expzrimmts was conducted into thrze stages, lhat is early, mddle and last according la the adsorbing stage and lhe number of column used. When camparing the removal efiicicncy in the final stage namral rcolites ratcd 64.5% and 78 5%, while zeohtc pdct rated 80.596, which showed larger amount of ammonia was adsorbed continuously than in other samples. Thc amount of adsorbed ammonia increased rs thc concenlraiion of ammonia increased and tl~e va~iation depending on the pH range showcd that larger amaunt of ammonia tended to be adsorbed m the neutral or akali pH range than in the acid pH range.

안전한 개인형 이동장치 사용을 위한 시스템 구조 제안

김완태,박병준,김현식 (사)디지털산업정보학회 2022 디지털산업정보학회논문지 Vol.18 No.3

Recently the use of personal mobility devices is rapidly increasing, and the businesses related to personal mobility devices are quickly growing as well. Although the use of personal mobility devices provides convenience for short distance movements, many problems occur due to the lack of safety devices and the absence of associated road traffic laws. The number of accidents caused by using personal mobility devices continues increasing every year, and the injuries or deaths are seriously happening with those accidents. When using personal mobility devices, there are basic safety precautions such as wearing a helmet, prohibiting boarding with more than two people, prohibiting boarding with more than 100kg, prohibiting using after drinking alcohol, and so on. However, it is exposed to traffic accidents because there is no way to check before using the system. Therefore, to ensure the user's safety in using the electric kickboard among personal mobility devices, this paper proposes a system that can check the user's safety state before using the electric kickboard. It is possible to safely use personal mobility devices and prevent accidents by proposing a system structure of the electric kickboard that can be used after checking for the use of more than two people, overweight, wearing a helmet, and drinking alcohol.

Clipping 구조를 개선한 OFDM 전송시스템의 PAPR 감소에 관한 연구

김완태,조성준,Kim, Wan-Tae,Cho, Sung-Joon 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.8

Recently many communication systems ate adapting the OFDM(Orthogonal Frequency Division Multiplexing) for multimedia data services. However, OFDM has some problems that PAPR is increased when sub-carries are summed up with same phases. This problem causes severe signal distortions while the signal is passing through non-linear system such as power amplifier resulting in performance degradation of transmission system. In this paper, we use IF-Clipping method to solve PAPR problem and the signal distortion caused by clipping is limited by use of SAW (Surface Acoustic Wave) filter and power amplifier(TWTA). And we derive the optimal parameter(PAPR, Backoff) values to meet the spectrum mask of WiBro system. 현재의 통신 시스템은 멀티미디어 서비스를 제공하기 위하여 OFDM(Orthogonal Frequency Division Multiplexing) 방식이 주로 쓰이고 있다. 그러나 OFDM 방식은 다수의 부반송파를 사용하므로 부반송파들이 동일위상으로 더해질 때 놀아지는 PAPR(Peak-to-Average Power Ratio)이 문제가 되고 있다. PAPR의 문제는 신호가 전력증폭기와 같은 비선형 소자를 통과할 때 심각한 왜곡을 받게 되므로 전송시스템 성능이 저하된다. 본 논문에서는 PAPR 문제를 해결하기 위해 IF-Clipping 기법을 제안하고, 신호의 clipping에 의해 발생되는 신호의 왜곡을 SAW(Solace Acoustic Wave) 필터와 전력증폭기를 사용하여 제한하였다. 또한 clipping 기법 이용 후 SAW Filter와 전력증폭기를 사용하여 WiBro 시스템의 Spectrum Mask를 만족하는 이상적인 파라메터 값(PAPR, Backoff)을 찾았다.

고에너지 밀에 의한 산화니켈광의 분쇄 거동 및 물성 변화

김완태,최도영,박성옥,김상배 대한지질학회 2009 대한지질학회 학술대회 Vol.2009 No.

火傷을 입은 흰쥐의 赤血球 壽命

金完泰 명지대학교 1968 明大論文集 Vol.2 No.-

Dept of food technology and Nutrition, Myong-ji College The rates of disappearance of Cr^51 tagged erythrocytes were measured in rats with a 20% body area scald. Radio-actvites were decreased exponentally with time showing straight lines on the Semi-logarhythmic paper. On the basis of SA of Cr^51 VS time curve, half survival time(t½) were calculated in normal and scald group in normal rats (6 rats), mean half survival time was 5.4 days and 2.1 day's in the scald rats consisted nine rats, Mechanisms of decrease in mean half survival time in the scald rats were briefly discussed.

방사선안전 - 규제 현황과 전망

김완태 대한방사선방어학회 2015 대한방사선방어학회 학술발표회 논문요약집 Vol.2015 No.04

萬頃江流域에 있어서 井水中의 弗素含量에 관한 硏究

金完泰,安榮根,申和雨,張賢淑 원광대학교 식품약품안전성연구소 1987 食品藥品安全性硏究 Vol.1 No.-

This study is the survey about Fluorine contents in the well water of area of Mankyung River side and water of Mankyung River. The result of this survey is as followings: The water of well in this area contained 0.5∼1.3ppm and it's average value was about 0.8 ppm. The water from Mankyung River contained 0.8∼0.9ppm and it's average value is 0.87ppm. By the regionally sectional survey the well water of the area of Mankyung River side, the well water of Chun-Ju, Iri, Samye, and Kusan contained 0.5∼0.8ppm, but the well water of Baikku area contained 0.6∼1.3ppm. Especially in Baikku area 63% of well contained 0.6∼1.0ppm and 38% of well contained 1.1∼1.3ppm. From the above results one can conclude that the 38% of well water of the Baikku area is troubled one.

알콜 음료의 이뇨작용에 대한 일 고찰

金完泰 명지대학교 자연과학연구소 1990 자연과학논문집 Vol.8 No.-

Experiments were performed to elucidate some aspects of the diuretic effect showed by alcoholic beverages. Fifteen healthy male students in the early twentieth were divided into three groups and induced the changes in the volume and the osmolar concentration of the extracellular fluid. The first group (water group) ingested 100ml of water ; the second one (Soju group) ingested 160ml of Soju(containing 25% of ethyl alcohol), Korean distilled spirits ; the third one (beer group) ingested 1000ml of beer (containing 4% of srhanol). Urine was collected every 30 minutes. Urinary, osmolartity and the excretion of sodium chloride were measured. And blood was sampled to measure blood alcohol level in Soju and beer groups. The results were obtained as followings : 1) The water group showed that the urinary flow begins to increase sithin 30 minutes and reached its peak at 30 minutes after he ingestion of water. The total volume excreted flow volume. And the condition of body fluid was suggested to recover to the normal control state sithin three hours. 2) The Sohu group showed that the urinary flow begins to increase as rapid as one in the water group and reached its peak at 90 minutes after the start of the experiment. The total volume excreted for three hours exceeded about 80ml over the sum of the ingested amount(160ml) and the control urinary flow (126ml). It was infered that the body fluid of this group showed the relative dehydration after the three hour experiment. And it was suggested but could never be concluded that the phenomena be due to the effect of some additives which were excreted slowly. 3) The beer group showed the very strong diuretic phenomena and eventual mild dehydration phenomena, which were suggested to be both the effect of alcohol itself in beer and the action of water contained in beer. 4) From the above results, it may be concluded that the diuretic effects of alcoholic beverages be due to some additives and water component in berverages as well as alcohol itself.

萬頃江 流城 井水中의 弗素含量 調査 硏究

金完泰 圓光大學校大學院 1979 學位論叢 Vol.2 No.-

This study is the survey about Florine contents in the well water of area of Man Kyung River side and water of Man Kyung River. The result of this survey is as followings : The water of well around this area contained 0.5-1.3 P. P. M. and it's average value is about 0.8P. P. M. The water from Man Kyung River contained 0.8-0.9 P. P. M. and it's average value is 0.87 P. P. M. By the regionally sectional survey the well water of the area of Man Kyung River side, the well water of Chun-Ju, Iri, Sam- Ye, and Kun-San contained 0.5-0.8 P. P. M. but the well water of Baik-Ku area contained 0.6-1.3 P. P. M. Especially in Baik-Ku area 63% of well contained 0.6-1.0 P. P. M. and 38% of well contained 1.1-1.3 P. P. M. From the above result one can conclude that the 38% of well water of the Baik-Ku area is troubled one.