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뇌졸중으로 인한 편마비 환자의 보행평가를 위한 체중심 가속도센서 기반의 새로운 보 검출 알고리즘 개발
이효기,황성재,조성필,이동률,유승현,이경중,김영호,정하중,Lee, Hyo-Ki,Hwang, Sung-Jae,Cho, Sung-Pil,Lee, Dong-Ryul,You, Sung-Hyun,Lee, Kyoung-Joung,Kim, Young-Ho,Chung, Ha-Joong 대한의용생체공학회 2009 의공학회지 Vol.30 No.3
In this study, we have developed a novel step detection algorithm for gait evaluation of patients with hemiplegia based on trunk accelerometry device. For this, we have used a bandpass filter and a least square acceleration (LSA) filter which is characterized by emphasizing the peak or valley point of the acceleration signals for each 3-axis accelerometer signals. To evaluate the algorithm, the detected steps by developed algorithm and real steps by the motion analysis system were compared. As a result, we could obtain the sensitivity of 96.44%, the specificity of 99.94% and the accuracy of 99.90% for the patients' data sets and the sensitivity of 100%, the specificity of 99.93% and the accuracy of 99.93% for the normal data sets. In conclusion, the developed algorithm is useful for the step detection for patients with hemiplegia as well as normal subjects.
이효기(Lee, hyo-gi),김동훈(Kim, Dong-Hoon) 한국실내디자인학회 2018 한국실내디자인학회 학술대회논문집 Vol.20 No.3
Text has played an important role in social and historical development as a means of human communication, from spoken to spoken languages to written languages. As the generation of characters has been formed over such a long period of time, various characters and languages have sprung up as needed. The creation of text messages allowed humans to clearly express or communicate their intentions regardless of distance or place, and they were kept as records for future generations. It has also become a way of keeping records as a means of communicating human thoughts and emotions, and pictures have also become increasingly simplified and developed into pictograms as they progress to the stage of using various symbols. The letters left an important historical basis. The purpose of this research is to propose a new type of museum through more than one combination of world characters and Hangeul through the Text Museum.
가속도계 기반의 편마비 환자 보행 평가를 위한 보 검출
李孝基(Hyo-ki Lee),李景中(Kyoung-joung Lee),金榮浩(Young-ho Kim),朴時?(Si-woon Park) 대한전기학회 2006 전기학회논문지 D Vol.55 No.10
In this paper, an algorithm to detect steps in hemiplegic patients using a 3-axis accelerometer attached on the trunk was proposed. The proposed algorithm consisted of the signal pre-processing, the step detector, the classification of steps and the calculation of stride time. Two FIR band-pass filters were designed and steps were measured by the combination of filtered signals in the vertical and the anteroposterior directions. In addition, the classification of steps and the calculation of stride time were computed by using the detected steps and lateral signals. For the experiment, fourteen hemiplegic patients were participated and the linear accelerations of the trunk and foot switch signals were measured synchronously. To evaluate the system performance, the detected steps and initial contacts by the foot switch were compared. The average error between the steps and initial contacts was 0.024ms and the difference of the average stride time was 0.01s. Finally, all gait events were detected exactly. Results showed that the accelerometry could use for the gait evaluation in clinical rehabilitation therapies.