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직렬통신과 Visual Basic을 이용한 Home Automation System
지준근,이광수 순천향대학교 부설 산업기술연구소 2002 순천향 산업기술연구소논문집 Vol.8 No.1
In this paper, hardware and control program for home automation system are developed. 9051 microcontroller is used in the hardware part. Multiple communication algorithm among plants is most important in the control program. Also image transfer method using USB port of IBM PC is used in this system. The DLL program needed for image transer is programmed by C++ and the entire control program is programmed by Visual Basic. Hardware part of the system is composed of multiple drivers according to each plant and some drivers have 8051 microcontroller for multiple communication. Data flow among plants is displayed on monitor of PC and transferred by serial communication with PC.
지준근 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3
This paper deals with the multiple method for large capacity inverter system. To enlarge the capacity of inverter system and to reduce the current ripples on inverter output side, two or more inverters are operated in parallel. Up to now six step inverts and sinusoidal PWM inverts have been developed for the parallel operation of inverts. In this paper, the parallel operation using space vector PWM inverts is considered, By using space vector PWM, many adventages such as reduced current ripple and reduced ripple torque can be obtained. Moreover, the inverter output current ripples can be greatly reduced by shifting the switching state of the two of more inverters effectively. The experimental results verifies the effectiveness of the proposed method.
변비 및 변실금 환자를 위한 휴대가 가능한 가정용 바이오피드백 치료기
지준근,차귀수,이문호 순천향대학교 부설 산업기술연구소 2001 순천향 산업기술연구소논문집 Vol.7 No.1
In this paper, biofeedback anal spincter control system is designed and implemented. This system is useful for training and cure anal spincter for idiopathic chronic constipation patient or idiopathic chronic and nerogenic fecal incontinence patient. This paper includes anal spincter EMG amplifier and signal processor in order to amplify and detect anal spincter EMG signal of several microvolts without distortion. It is also includes monitoring system to confirm anal spincter EMG signal using LED display and speaker sound output.
단상 인버터의 위상변위 제어 방식에 의한 오존발생 시스템의 전원장치 개발
지준근,윤기현 순천향대학교 교수학습개발센터 2005 순천향 산업기술연구소논문집 Vol.11 No.1
In this paper, power supply for ozone generating system is explained. Output voltage and frequency are controlled by phase displacement control of single phase inverter using ATmega128. The values of desired output voltage and frequency can be set using keypad and can be displayed using LCD. Actually, power supply is designed and manufactured. Through the experiments, the performance of output voltage and frequency control is verified.
지준근,임영하 순천향대학교 부설 산업기술연구소 2002 순천향 산업기술연구소논문집 Vol.8 No.1
In this paper the micro mouse system with high stability is proposed. Hardware system of micro mouse is configured by PCB layout and artwork after simplifying the circuits using EPLD(Erasable Programmable Logic Device). Also, advanced motion algorithm using new motion table is introduced. As a result of manufacturing micro mouse and carrying out motion experiment, it is confirmed that the reduction of motion period in micro mouse is depend on not maximum speed but acceleration and deceleration method. Therefore, it is shown that configuration and application of proposed motion table in micro mouse system can improve conventional motion algorithm.
상간리액터가 없는 12펄스 병렬연결 듀얼 컨버터 시스템의 특성해석과 새로운 전류제어
지준근 순천향대학교 부설 산업기술연구소 1999 순천향 산업기술연구소논문집 Vol.5 No.1
본 논문에서는 상간리액터를 사용하지 않는 12펄스 병렬연결 듀얼 컨버터 시스템의 해석 및 새로운 전류제어 방법이 제안된다. 먼저 상간리액터가 없는 시스템의 특성을 해석하고 상간리액터를 사용하는 시스템의 특성과 비교한다. 그리고 이 시스템에 대한 새로운 전류제어 방법인 예측전류제어 방법을 소개한다. 제안된 시스템의 타당성과 전류제어 방법의 탁월함은 시뮬레이션 결과와 실험결과를 통해 입증된다.
지준근,류신형 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3
This paper proposes the new maze running strategy that micro-mouse can run on theshortest path and time in the maze. Also it is explained that the conceptual structure of micro mouse to implement the strategy. And to solve the complex motion control problem, motion tabling method in introduced and implemented. Through computer simulation about the pose control of micro-mouse during running the maze, it is proved that proposed strategy is excellent.
허혈성 심질환에서 나타나는 항산화지수, 사이토카인 및 염증지표의 변화
전상훔,안지훈,방덕원,온영근,현민수,김성구,권영주 순천향대학교 교수학습개발센터 2004 Journal of Soonchunhyang Medical Science Vol.10 No.3
Purpose : As diet habits change and the elderly popuation increases conronary artery disease(CAD) has also increased. Recent ongoing studies on varous inflammatory indexes in acute coronary syndrome(ACS) are underway. Several study results have shown that total antioxidant status(TAS) was remarkably lower in unstable angina than in chronic stable angina and levels of interleukin-(IL-6), C-reactive protein(CRP), monocyte chemoattractant protein-1(MCP-1), P-selectin were reported to be elevated in unstable angina and acute myocardial infarction(AMI). In our study, we studied and compared the level changes of cytokines and inflammatory indexes that play important roles inside the blood vessel. Methods : Study subjects were patients who were admitted and underwent coronary angiography at the cardiology department in Soonchunhyang university hospital. Subjects were divided into 4 groups, a control group, a stable angina and unstable angina group and an acute myocardial infarction group. The clinical findings, TAS, inflammatory cytokines(P-selectin, MCP-1, IL-6), anti-inflammatory cytokines(IL-10), Homocysteine and CRP levels in each group were measured and compared. Results : The total number of study participants was 86 patients, with 26 patients in the control group, 21 patients with stable angina, 15 patients with unstable angina, and 24 patients with AMI. There were significant differences in the TAS among the 4 grouops. 1.7±0.51 mmol/L, 1.6±0.60 mmol/L, 1.4±0.20 mmol/L, 1.4±0.29 mmol/L respectively. IL-6 levels also showed a significant difference between groups, averaging 0.8±2.47 pg/ml, 2.7±3.77 pg/ml, 6.8±10.63 pg/ml, 10.9±17.43 pg/ml respectively. Homocysteine levels averaged 8.0±2.47 pg/ml, 6.8±10.63 pg/ml, 10.9±17.43 pg/ml restectively. Homocysteine levels averaged 8.0±1.0 μmol/L in the control group, 14.3±5.14 μmol/L in patients with stable angina, 16.0±4.66 μmol/L in patients with unstable angina, and 17.3±10.08 μmol/L in AMI patients. Conclusion : Compared to the control group, the TAS levels were significantly lower in patients with unstable angina and AMI. there was no difference between the control group and those with stable angina. IL-6 and homocysteine levels were also higher in patients with unstable angina and AMI. Therefore we concluded that measurements of TAS, IL-6 and homocysteine are useful in measuring the inflammatory index of coronary artery diseases and may be important factors in predicting the states and prognosis of cardiovascular disorders.
지준근,임영하 순천향대학교 부설 산업기술연구소 2003 순천향 산업기술연구소논문집 Vol.9 No.1
In this paper new control strategy of series resonant converter system for control power supply is suggested. Frequency controlled series resonant converter system is robust to load variations because it is POSR(parallel output series resonant) type. And it provides stable output voltage by changing switching frequency to input voltage variations. Firstly, operation analysis about suggested series resonant converter system was carried. Then simulations using ACSL(Advanced Continuous Simulation Language) and experiments to actual system were carried to prove characteristics of suggested system.
2관성계 전동기 구동 시스템의 축 비틀림 진동 억제를 위한 속도제어기의 특성비교
지준근 순천향대학교 부설 산업기술연구소 1996 순천향 산업기술연구소논문집 Vol.2 No.2
This paper deals with the comparison study of speed controller for torsional vibration suppression of 2-mass motor drive system. Firstly conventional methods were classified systematically and the features of each method were also compared. Especially the speed contrller based on Kalman filter and LQ state feedback was proposed and the response characteristics of it were compared with those of some other methods Through various computer simulations and the experiments of real 22[kW] field oriented controlled AC motor drive system having 2-mass mechanical system, the characteristics of proposed speed controller, typical PI speed controller, and state feedback speed controller using reduced order observer and pole placement method were compared and analyzed. As the result, it was confirmed that the characteristic of speed controller using Kalman filter and LQ is the best among them.