초음파 모터를 이용한 롤-스크린 시스템 설계

김정도,정우석,함유경,김동진,홍철호,Kim, Jeong-Do,Jung, Woo-Suk,Ham, Yu-Kyung,Kim, Dong-Jin,Hong, Chul-Ho 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.8

롤-스크린의 조용한 동작을 위해 압전 초음파 모터를 사용하여 롤-스크린이 설계되었다. 롤-스크린에 사용된 초음파 모터를 구동하기 위하여, 디지털로 제어되는 구동회로가 PLD를 사용하여 설계되었다. 또한 롤-스크린의 위치와 속도를 측정하기 위하여 1회전 당 36펄스의 엔코더가 사용되었다. 이러한 저급 엔코더를 사용함에도 불구하고, 초음파 모터의 정밀한 속도제어를 위하여 새로운 제어 방법이 제안되었다. 제안된 방법은 가변 샘플링시간을 사용하고 있으며, 초음파모터가 가지는 초기 비선형 특성 문제를 보상하도록 하였다. For silent operation, Roll-Screen has been designed by using piezolelectric ultrasonic motor. To drive the ultrasonic motor, a digitally controlled drive system has been designed by using PLD. And to measure the position and velocity of Roll-Screen, encoder with 36 pulse/revolution is used. This paper proposed a new method for a precise velocity control of ultrasonic motor, in spite of using low-level encoder. The proposed method use a non-fixed sampling time and compensate the initial nonlinear characteristics of ultrasonic motors.

ECG와 호흡 측정이 가능한 모바일 헬스케어 의류 시스템

김정도,김갑진,정기수,이정환,안진호,이상국,Kim, Jeong-Do,Kim, Kap-Jin,Chung, Gi-Su,Lee, Jung-Hwan,Ahn, Jin-Ho,Lee, Sang-Goog 한국정보처리학회 2010 정보처리학회논문지 A Vol.17 No.3

대부분의 모바일 웨어러블 헬스케어 모니터링 의류 시스템은 생체신호를 측정할 수 있는 센서와 데이터 취득과 무선 통신 및 제어를 담당하는 회로부, 이들을 내장하는 의복으로 구성된다. 기존의 의복형 헬스케어 시스템은 센서를 의복에 장시간 내장하기가 어렵고, 피부 접촉 시 시간에 따라 저항 값이 변화하기 때문에 장기적인 생체 신호 모니터링이 쉽지 않으며, 센서 전극과 회로 사이에 존재하는 신호선의 물리적 장애 요인도 가지고 있다. 본 연구에서는 이러한 문제점들을 해결하기 위하여, PVDF에 PEDOT 재료를 코팅하여 만든 패브릭 나노웹 ECG 전극과 PVDF 필름을 사용한 호흡 센서를 $10\;{\mu}m$ 두께의 디지털 실을 이용하여 사용자의 의류와 일체화하였다. 탈부착이 가능한 무선 블루투스(Bluetooth) 내장 스테이션과 디지털실로 기존 의류와 일체화한 생체 신호 측정용 의류 제작을 통해, 휴대폰에서 손쉽게 심전도(ECG)와 맥박신호를 표시 할 수 있었다. Most wearable system for mobile healthcare applications consists of three parts. The first part is the sensing elements based on bio-signal, the second is the circuit module for control, data acquisition and wireless communication and control and the third is garment with a built-in electrodes and circuits. The existing healthcare garment systems have to find a solution to signal-wire and uncomfortable and inappropriate electrode to long-term attachment. Even if the wireless communication is used for healthcare garment system, the interface between sensors and circuits have to use wires. To solve these problems, this paper use electrode using PEDOT coated PVDF nanoweb for ECG signal and PVDF film sensor for respiratory signal. And, we constructed garment network using digital yarn of 10um, and transmitted ECG and respiratory signal to mobile phone through the integrated circuit with bluetooth called station To evaluate feasibility of the proposed mobile healthcare garment system, we experimented with transmission and measurement of ECG and respiratory signal using nanoweb electrode and digital yarn. We got a successful result without noise and attenuation.

정치배양을 이용하여 Acetobacter sp. V6의 셀룰로오스 생산 최적화 및 구조 분석

김정도,정호일,정진하,박기현,전영동,황대연,이충열,손홍주,Kim, Jeong-Do,Jung, Ho-Il,Jeong, Jin-Ha,Park, Ki-Hyun,Jeon, Young-Dong,Hwang, Dae-Youn,Lee, Chung-Yeol,Son, Hong-Joo 한국미생물학회 2009 미생물학회지 Vol.45 No.3

한국 전통발효식초로부터 분리된 Acetobacter sp. V6에 의한 bacterial cellulose (BC) 생산을 위한 최적 배지조성을 정치배양을 이용하여 조사한 후, 생성된 BC의 구조적 특성을 검토하였다. 탄소원으로 glucose 3%, 질소원으로 soytone 3%가 선정되었다. 또한 인산염은 $K_2HPO_4$ 0.8%였으며, 추가로 첨가한 $NaH_2PO_4$와 $KH_2PO_4$는 BC 생산 증가를 나타내지 못하였다. 보조탄소원으로 ethanol 0.4%에서 가장 높은 BC 생산성을 나타내었다. 최적 배지조성하에서 배양 8일만에 최대 44.7 g/$m^2$의 BC가 생산되었으며, 배양 8일경, BC pellicle의 두께는 약 1 cm였다. BC의 구조는 Fourier-transform infrared spectroscopy 및 X-ray diffractometer를 이용하여 조사하였다. 최적배지에서 생성된 BC는 전형적인 cellulose type I임을 알 수 있었으며, 식물성 셀룰로오스와 성분의 차이가 없었다. 또한 독특한 미세망상구조로 이루어져 있었고, 높은 결정성을 나타내어 식물유래 셀룰로오스와 다른 독특한 물성을 나타내는 것으로 추정되었다. The optimal medium compositions for the production of bacterial cellulose (BC) by a Acetobacter sp. V6, which was isolated from the traditionally fermented vinegar in Korea, were investigated in static cultures. The optimum medium compositions for BC production were 3% glucose, 3% soytone, 0.8% $K_2HPO_4$, and 0.4% ethanol, respectively. Adding $NaH_2PO_4$ or $KH_2PO_4$ had not shown the increase in BC production. Under the optimum medium compositions, the highest BC production was 44.67 g/$m^2$ in 8 days and the thickness of BC pellicle was about 1 cm. Structural properties of BC produced in the optimal medium were studied using Fourier-transform infrared spectroscopy and X-ray diffractometer. BC from the optimal medium was found to be of cellulose type I, the same as typical native cellulose. No difference in the compositions between bacterial and plant celluloses, but BC showed unique micro-network structure and high crystallinity (82%).

국가정보원 통제를 둘러싼 국회-행정부 관계

김정도 ( Jung Do Kim ) 대한정치학회 2009 大韓政治學會報 Vol.16 No.3

본 연구는 의회가 국가정보원에 대한 통제에 있어 그 기능과 역할을 다하지 못한 이유를 규명하는 데 목적이 있다. 본 연구는 국가정보원에 대한 의회통제의 이행 수준이 높지 않은 이유를 다음의 측면에서 확인해 보았다. 첫째, 우리의 의회는 여야대립 양식의 의회-행정부 관계가 지배적이기 때문에, 국가정보원을 통제할 실질적 권한을 가진 법률안의 통과가 어렵다. 여야대립 양상에서 중요한 역할을 하는 것은 정당간의 이념적 성향이다. 정당간 이념적 성향차이는 국가정보원 통제에 대한 상이한 입장으로 표명되고, 의회의 권한 확대에 대한 합의를 도출하는 데 실패한 데서 드러난다. 둘째, 여야간 이념적 차이가 비교적 적어 의회 내 합의가 가능한 비정당 양식이 기대되는 영역에서는 의회가 단합하여 대통령을 중심으로 하는 행정부에 대한 견제자로서 일정한 역할을 해야 한다. 그러나 의원들은 국가정보원 통제에 소극적인 대통령의 의사를 거슬러 행동하기 어렵다. 대통령이라는 존재가 국가정보원에 대한 통제의 걸림돌이 되고 있다. 정당간 정치적 합의와 대통령의 의지가 중요한 시점이다. This paper is to examine how effectively the National Parliament has exercised its oversight authority over the National Intelligence Service, and to analyse the reasons it has been so if it turns out that the level of oversight performance has not been so high. This study lists the following reasons for rather poor performance on the part of Parliament. First, Parliament lacks legal authority in controlling the National Intelligence Services. It couldn`t pass laws giving it enough power to oversee the National Intelligence Service, because the so called "opposition mode" has been dominant in Parliament- executive relations. Second, in a sphere of non-party mode anticipating, Parliament should play an important role in supervising executive and president. But it is difficult for members of Parliament to act against the will of president with an passive posture on the oversight over the National Intelligence Service. President makes an obstacle in improvingr the oversight over the National Intelligence Service. It is time for a turning point that the political consensus between parties and the will of president are important.

패시브 공진 스너버를 이용한 플라이백형 ZVS PWM DC-DC 컨버터의 특성해석

김정도(Jung-Do Kim),문상필(Sang-Pil Mun),박한석(Han-Seok Park) 대한전기학회 2016 전기학회논문지 P Vol.65 No.3

In this paper, a high frequency flyback type zero voltage soft switching PWM DC-DC converter using IGBTs is proposed. Effective applications for this power converter can be found in auxiliary power supplies of rolling stock transportation and electric vehicles. This power converter is basically composed of active power switches and a flyback high frequency transformer. In addition to these, passive lossless snubbers with power regeneration loops for energy recovery, consisting of a three winding auxiliary high frequency transformer, auxiliary capacitors and diodes are introduced to achieve zero voltage soft switching from light to full load conditions. Furthermore, this power converter has some advantages such as low cost circuit configuration, simple control scheme and high efficiency. Its operating principle is described and to determine circuit parameters, some practical design considerations are discussed. The effectiveness of the proposed power converter is evaluated and compared with the hard switching PWM DC-DC converter from an experimental point of view and the comparative electromagnetic conduction and radiation noise characteristics of both DC-DC power converter circuits are also depicted.

압전 엑추에이터를 위한 IEEE 1451.4 TEDS 제안

김정도(Jeong-Do kim),김동진(Dong-Jin Kim),정우석(Woo-Suk Jung),추대원(Dae-Won Choo),홍철호(Chul-Ho Hong) 대한전자공학회 2006 대한전자공학회 학술대회 Vol.2006 No.11

It is important to define a standard method to store basic sensor information, such as the type and the structure for an piezoelectric actuator and there is no such method defined in the IEEE 1451.4 transducer electronic data sheet (TEDS) so far. The major challenge is to choose a suitable standard template that can be used with actuators for piezoelectric devices. In this paper, we propose a new template TEDS and the structure of interface for IEEE 1451.4 for piezoelectric actuators.

IEEE 1451.2를 이용한 전자코 시스템 구현

김정도(Jeong-Do Kim),박준석(Jun-Seok Park),김정주(Jeong-Ju Kim),정영창(Young-Chang Jung),변형기(Hyung-Gi Byun) 대한전자공학회 2006 대한전자공학회 학술대회 Vol.2006 No.11

The Family standard are recently available, it defines interface between sensor and processor, and plug and play is possible. In addition, Intelligence of sensor was possible because sensor includes transducer electronic data sheet (TEDS). In IEEE 1451.4 is suitable standard in single sensor, and IEEE 1451.2 is suitable standard in multi-sensors (array of sensors). In this paper, IEEE 1451 is applied to electronic nose system. The electronic nose system used an array of sensor is difficult and complex to apply IEEE 1451.4 provided standard for single sensor. We apply IEEE 1451.2, which provides standard for an array of sensors, to design of electronic nose system. Throughout the presentation, we proposed communication interface method for IEEE 1451.2 and TEDS) of electronic nose system.

전자코를 이용한 액취증의 진단

김정도 ( Jeong Do Kim ),장성진 ( Seong Jin Jang ),임승주 ( Seung Ju Lim ),박성대 ( Sung Dae Park ),김동진 ( Dong Jin Kim ),김정주 ( Jung Ju Kim ) 한국센서학회 2013 센서학회지 Vol.22 No.4

The purpose of this paper is to diagnose osmidrosis visually and quantify the extent of osmidrosis. To achieve this, we designed the diagnosis method of osmidrosis using electronic nose system. The developed electronic nose system use principal component analysis for visualization of osmidrosis and fuzzy c-means algorithm for quantification. To confirm the efficiency of electronic nose system for osmidrosis diagnosis, we obtained samples from 34 volunteers and compared our experiment results with the doctor`s diagnosis, and we met with successful results.

IEEE 1451.2를 이용한 전자혀 시스템 구현

김정도(Jeong-Do Kim),김동진(Dong-Jin Kim),이정환(Jung-hwan Lee),함유경(Yu-Kyung Ham),한동원(Dong-Won Han) 대한전자공학회 2006 대한전자공학회 학술대회 Vol.2006 No.11

The IEEE 1451 publication are available, this standard defines interface between sensor and processor, and plug and play in processor is possible. Also, Intelligence of sensor was possible because sensor includes transducer electronic data sheet (TEDS). In IEEE 1451 standards, IEEE 1451.4 is suitable standard in single sensor, and IEEE 1451.2 is suitable standard in multi-sensors (array sensor). In this paper, apply IEEE 1451 to electronic tongue system. In the case of electronic tongue system, because array sensor is used, it is that complex and difficult to apply IEEE 1451.4 that is standard for single sensor. In this paper, apply IEEE 1451.2 for array sensor to design of electronic tongue system. Communication interface method of IEEE 1451.2 for electronic tongue system is presented, and implemented TEDS of electronic tongue system.

생물학적 후각 시스템을 모방한 대규모 가스 센서 어레이에서 코사인 유사도와 퍼지 클러스터링을 이용한 중복도 제거 방법

김정도 ( Jeong Do Kim ),김정주 ( Jung Ju Kim ),박성대 ( Sung Dae Park ),변형기 ( Hyung Gibyun ),( K. C. Persaud ),임승주 ( Seung Ju Lim ) 한국센서학회 2012 센서학회지 Vol.21 No.1

It was reported that the latest sensor technology allow an 65536 conductive polymer sensor array to be made with broad but overlapping selectivity to different families of chemicals emulating the characteristics found in biological olfaction. However, the supernumerary redundancy always accompanies great error and risk as well as an inordinate amount of computation time and local minima in signal processing, e.g. neural networks. In this paper, we propose a new method to reduce the number of sensor for analysis by reducing redundancy between sensors and by removing unstable sensors using the cosine similarity method and to decide on representative sensor using FCM(Fuzzy C-Means) algorithm. The representative sensors can be just used in analyzing. And, we introduce DWT(Discrete Wavelet Transform) for data compression in the time domain as preprocessing. Throughout experimental trials, we have done a comparative analysis between gas sensor data with and without reduced redundancy. The possibility and superiority of the proposed methods are confirmed through experiments.