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LabVIEW를 이용한 소형 유도전동기의 권선고장 자동진단
宋明現(Myung-Hyun Song),朴奎南(Kyu-Nam Park),韓東奇(Dong-Gi Han),禹奕在(Hyeok-Jae Woo) 대한전기학회 2006 전기학회논문지 P Vol.55 No.4
In this paper, an auto detection method of stator winding fault of small induction motor is suggested. The Park's vector pattern which is obtained from 3-phase current signal by d-q transforming, is very good to detect winding fault. Comparing the Park's vector pattern of testing motor with its of healthy motor, the Park's vector pattern of fault motor is became an ellipse and the asymmetry is increased by the winding fault serios. So for detecting the dis-symmetry, id-filtered function, Min-value, and Max-value are suggested for auto detecting. Using LabVIEW programing, 3-phase healthy motor and several kind of winding fault motors are tested and the test results are shown that the suggested method can gives us a possibility of an auto detecting winding fault.
박재성,신동철,김주혁 창원대학교 체육과학연구소 2000 경남 체육연구 Vol.5 No.1
일반인의 장애인에 대한 의식도를 파악, 분석해 봄으로써 장애인들이 보다 밝은 생을 영위해 나가는데 필요한 기초자료를 제공하고, Gottlieb와 Corman의 설문자료를 참조하여 의식도에 관계되는 문항을 우리나라 여건에맞게 수정·보완하였으며, 199년도 부산광역시에 거주하는 시민으로서남자 387명과 여자171명 총 558명을 무작위로 추출한 결과 다음과 같은 결론을 얻었다. 1. 일반인의 장애인에 대한 인성의 인식도에서는성별, 연령, 교육수준에 의해서는 차이가 없으나, 종교인과 생활수준이 높은사람일수록‘친하게 지낼 수 있다’라고 나타났다. 2. 일반인이 장애인과의 공동생활여부에 대해서는성별과 연령은 무관하나, 종교유무, 교육수준, 생활수준에 의해서는 공동생활여부가결정되는 것으로 나타났고, 결혼여부에서는 성별, 교육수준, 생활수준에 의해서 차이가 있는 것으로 나타났다. 3.일반인의 장애인에 대한 체육활동 필요여부에서는 성별, 연령, 종교유무, 생활수준에 의해 차이가 나타났으며, 장애인의 직장생활에대한 성공여부로서는 성별, 연령, 교육수준, 생활수준에 의해 차이가 있는 것으로 나타났다. 4.장애인이 지역사회의 체육활동과 클럽행사 참여여부에 대해서는 연령, 종교유무, 생활수준과는 차이가 없으나, 성별, 교육수준에 의해서는차이가 있는 것으로 나타났다. 현재 장애인에 대한 편견을 버리고, 인간으로삶의 질을 향상시키기 위해서는 모두가 관심을 가지고 시설 확충이나 장애인을 위한 다양한프로그램을 제공해 줄 수 있도록 관계기관에서는 보다 많은 재원확보와 관심을 기울여야 할 것으로 사료된다.
전립선암과 전립선비대증 환자에서 혈청 유리 및 총전립선특이항원 측정의 의의
서혁준,박형민,권태균,정성광,김법완,이재태 경북대학교 의학연구소 2000 경북대학교병원의학연구소논문집 Vol.4 No.1
Purpose: This study was peformed to investigate whether the free to total PSA ratio(F/T PSA ratio) offers a better discriminant for the detection of patient with prostatic cancer(CaP) and those with benign prostatic hyperplasia(BPH) than serum total PSA alone. Materials and Methods: From September 1996 to February 1999, free and total PSA levels were measured on frozen sera samples of 154 men with BPH and 46 with CaP using immunoradiometric assay. Results: In all subjects, the mean total PSA was significantly higher in CaP group(72.57±66.58ng/ml) than BPH group(3.12±4.10ng/ml). The mean PSAD was significantly higher in CaP group(1.64± 1.86) than BPH group(0.08±0.01). The mean F/T PSA ratio was significantly lower in CaP group(0.19± 0.07) than BPH group(0.30±0.13). Among 41 subjects whose total PSA were between 4-20ng/ml, the mean PSAD was significantly higher in CaP group(0.37±7.16) than BPH group(0.17± 0.07), but the mean F/T PSA ratio was not significantly different between CaP(0.19± 0.10) and BPH group(0.25±7.13). By comparing the sensitivity and specificity of total PSA alone, PSAD and F/T PSA ratio on receiver operating characterislic (ROC) Cutie in all subiects and subiects with total PSA between 4-20ng/ml, F/T PSA ratio had no superiority than total PSA alone and PSAD for discrimination between CaP and BPH. Conclusions: We suggest that the F/T PSA ratio is not superior to total PSA alone and FSAD in the detection of prostatic cancer, and further evaluation of the usefulness of F/T PSA ratio should be required.
동물원에서 사육중인 Japanese Macaque (Macaca fuscata)에서 Zoletil 마취에 관한 연구
이재일,이수진,홍성혁,신남식,김덕환,박창식,전무형,조종민,김영석,김명철 충남대학교 형질전환복제돼지연구센터 2004 논문집 Vol. No.8
To evaluate the effects of Zoletil (tiletamine-zolazepam) that have been widely used for the chemical restraint and anesthesia of primates, on physiologic alteration, blood gas analysis and anesthetic duration in the Japanese macaque(Macaca fuscata), this study was carried out. Zoleril was administered by intramuscular injection, Evaluation of temperature, heart rate, respiration rate and blood gas analysis were performed before administration ancl at 1,10, 20, 30, 40, 50 and 60 min after administration, and induction and maintenance time was recorded. There was no significant difference in heart rate, PCO₂PO₂after Zolcril administration and temperature, respration rate, pH were significant difference compared with those of before administration, The induction time was 2.5±l.Omin and maintenance time was 86±23.2min. It was considered that Zoletil could he usefully used for the sedation and immobilization of Japanese macaque reared in zoological garden.
철골보와 철근콘크리트기둥으로 이루어진 접합부의 기존 내력평가법에 관한 비교연구
안재혁,박천석 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
This paper is on the study of strength evaluation for the frame joint made from reinforced concrete column and steel beam(RCS system joints). Especially for those categorized as through beam type, the accuracy of the existing design equations proposed in the inside and outside of the country was studied in detail with shear key such as face bearing plate(FBP), Extended FBP, vertical joint reinforcement. It was shown that strength evaluation equations proposed in James K. Wight provided the most accurate and consistent strength estimates. Some design equations proposed by Japanese often underrated the joint strength for specific joint details.
Winding Fault Diagnosis of Induction Motor Using Neural Network
Song Myung-Hyun,Park Kyu-Nam,Woo Hyeok-Jae,Lee Tae-Hun,Han Min-Kwan The Korea Institute of Information and Commucation 2005 Journal of information and communication convergen Vol.3 No.2
This paper proposed a fault diagnosis technique of induction motors winding fault based on an artificial neural network (ANN). This method used Park's vector pattern as input data of ANN. The ANN are firstly learned using this pattern, and then classify between 'healthy' and 'winding fault' (with 2, 10, and 20 shorted turn) induction motor under 0, 50, and $100\%$ load condition. Also the possibility of classification of untrained turn-fault and load condition are tested. The proposed method has been experimentally tested on a 3-phase, 1 HP squirrel-cage induction motor. The obtained results provided a high level of accuracy especially in small turn fault, and showed that it is a reliable method for industrial application