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주파수 추적 방식에 의한 이식형 의료기기용 무선전력전달 장치 구현
임형규,이장우,김동욱,이정현,성기웅,김명남,조진호,Lim, H.G.,Lee, J.W.,Kim, D.W.,Lee, J.H.,Seong, K.W.,Kim, M.N.,Cho, J.H. 대한의용생체공학회 2010 의공학회지 Vol.31 No.5
Recently, many implantable medical devices have been developed and manufactured in many countries. In these devices, generally, energy is supplied by a transcutaneous method to avoid the skin penetration due to the power wires. As the most transcutaneous power transmission methods, the electromagnetic coupling between two coils and resonance at a specific frequency has been used widely. However, in case of a transcutaneous power transmitter with a fixed switching frequency to drive an electromagnetic coil, inefficient power transmission and thermal damage by the undesirable current variation may occur, because the electromagnetic coupling state between a primary coil and a secondary coil is very sensitive to skin thickness of each applied position and by person. In order to overcome these defects, a transcutaneous power transmitter of which operating frequency can be automatically tracked into the resonance frequency at each environment has been designed and implemented. Through the results of experiments for different coil surroundings, we have been demonstrated that the implemented transcutaneous power transmitter can track automatically into a varied resonance frequency according to arbitrary skin thickness change.
조진호(J. H. Cho),김종훈(J. H. Kim),조유진(Y. J. Cho),안형준(H. J. Ahn),박영빈(Y. B. Park),박효순(H. S. Park),우승탁(S. T. Woo),신동호(D. H. Shin),김동욱(D. W. Kim),임형규(H. G. Lim),이정현(J. H. Lee),성기웅(K. W. Seong) 한국재활복지공학회 2015 한국재활복지공학회 학술대회논문집 Vol.2015 No.11
In this paper, we present the development procedure of fully implantable hearing device with round window driving method which is named ACROSS-RW. The system consists of an implantable microphone, a signal processing body, and a vibration transducer. Each component is developed with needs of hearing losses and novel idea for overcoming lacks of previous studies. The performance of the system is evaluated from public certification organization and mechanical engineering laboratory of Stanford University in USA, which is well-known for testing of active middle ear implants. ACROSS-RW can provide natural sound and good cosmetic to people who suffer from hearing loss.
이장우(J. W. Lee),정의성(E. S. Jung),임형규(H. G. Lim),이정현(J. H. Lee),조진호(J. H. Cho) 한국재활복지공학회 2009 한국재활복지공학회 학술대회논문집 Vol.2009 No.10
Generally, fully implantable middle ear hearing device (F-IMEHD) is implanted under the skin nearby human temporal bone. It has implantable microphone and vibration transducer. The microphone and transducer have particular characteristics. Fitting software has to consider their characteristics. In this paper, fitting software for F - IMEHD has been designed and implemented. It can find out proper fitting parameter reflecting characteristics of the microphone and transducer for patients who has difficulty in hearing.
완전 이식형 인공중이용 마이크로폰 위치 결정을 위한 물리적 귀 모델에서의 음향 반향 현성 분석
김동욱(D. W. Kim),성기웅(K. Y. Seong),임형규(H. G. Lim),김민우(M. W. Kim),이명원(M. W. Lee),정의성(E. S. Jung),이장우(J. W. Lee),이정현(J. H. Lee),조진호(J. H. Cho) 한국재활복지공학회 2008 한국재활복지공학회 학술대회논문집 Vol.2008 No.11
Generally, implantable microphone has been implanted in the temporal bone for implantable middle ear hearing devices (IMEHDs). In this case, the microphone"s membrane can be damaged and can be generated biological noise. In order to overcome the these problems, the location of implanted microphone should be changed. As an alternative, the microphone can be implanted in the external auditory canal or in the .pinna. However, the sound emission can be produced because of vibration transducer toward reverse direction from the tympanic membrane to the external auditory canal. In this paper, an amount of the emitted sound is measured using a probe microphone as the changing the position of microphone in the external auditory canal or in the pinna of a physical ear model, which is similar to acoustical and vibratory properties of the human ear. According to analysis of the measurements, the proper location of the microphone can be estimated which can minimize emitted sound.
베이스-스테이션과 피팅 소프트웨어를 기반으로 한 완전 이식형 인공중이용 피팅 시스템
이장우(J. W. Lee),정의성(E. S. Jung),임형규(H. G. Lim),이정현(J. H. Lee),조진호(J. H. Cho) 한국재활복지공학회 2008 한국재활복지공학회 학술대회논문집 Vol.2008 No.11
Through several papers, we announced that fully implantable middle ear hearing device (F-IMEHD) has been researched. The F-IMEHD requires proper fitting process reflected properties of each device like other hearing aids. The F-IMEHD uses vibration transducer attached on ossicles to transmit the sound signal to human"s inner ear. The microphone is implanted under skin. Therefore, the fitting process for F-IMEHD has to consider properties of the microphone and transducer. The F-IMEHD some external devices to control it, because it is impossible that user cannot control the device using wired method without damage to skin. In this paper, base-station and fitting software have been designed and implemented for F-IMEHD. In addition, based on them, we also have proposed direct fitting system for F-IMEHD. We calculates proper parameters according to hearing level of each patient through the fitting software, and then transmit the calculated values to implantable system through the base-station. The base-station has all function to control fitting parameters for F-IMEHD as a wireless controller, As a sub-part of direct fitting system, it transmits fitting parameters from fitting software on PC to F-IMEHD.
조진호,박일용,임형규,윤영호,성기웅,정의성,한지훈,김민규,이상흔 한국장애인재활협회 2006 재활복지 Vol.10 No.3
인구의 고령화가 진행되면서 난청인구는 증가하고 있으며 난청자들은 일반적으로 공기전도형 보청기를 사용하고 있다. 이러한 보청기는 미용문제와 귀 폐쇄감 및 하울링 현상 등으로 인해 난청자들이 기피하고 있으며, 이를 극복하기 위한 방법으로 완전히 은닉할 수 있고 음향 피드백의 영향이 적은 완전 이식형 인공중이 시스템이 전 세계적으로 주목받고 있다. 경북대 첨단 감각기능 회복장치연구센터(Advanced Research Center for Recovery of Human Sensibility, ACRHS)는 보건복지부의 지원과 (주)파이컴의 참여 하에, 약 4년간의 연구 결과로 차동 전자 트랜스듀서를 기반으로 하는 완전 이식형 인공중이 시스템의 시제품 ACROHS-1.5와 그 주변장치로 무선 제어기 및 무선 충전장치를 각각 구현하고 실험을 통해 평가하였다. 현재는 제작된 시제품을 기반으로 한국식품의약품안전청 (KFDA)의 시험을 받기 위한 준비과정에 있다. Recently, persons who have difficulty in hearing are increase as aging of population, conventional hearing aids are generally used by them. In contrast with conventional hearing aids, implantable middle ear hearing devices (IMEHDs) with the advantages of complete concealment, occlusion of ear, and reduction of acoustic feedback are remarkable methods to overcome difficulties of people who have from moderate hearing loss to severe hearing loss. At Advanced Research Center for Recovery of Human Sensibility (ACRHS) in Kyungpook National University (KNU) under the auspices of Korean Ministry of Health & Welfare (KMHW) and PHICOM Co, as the products of their research during 4 years, fully implantable middle ear hearing device (ACROHS-1.5) based on a differential floating mass transducer (DFMT), an implantable microphone, a remote controller, and a wireless charger have been implemented. Each prototype has been evaluated through several experiments. In the present time, we are going to prepare clinical trials for approval of Korean Food and Drug Administration (KFDA).