• Title/Summary/Keyword: electronic skin

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Real Time ECG Monitoring Through a Wearable Smart T-shirt

  • Mathias, Dakurah Naangmenkpeong;Kim, Sung-Il;Park, Jae-Soon;Joung, Yeun-Ho
    • Transactions on Electrical and Electronic Materials
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    • v.16 no.1
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    • pp.16-19
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    • 2015
  • A wearable sensing ECG T-shirt for ubiquitous vital signs sensing is proposed. The sensor system consists of a signal processing board and capacitive sensing electrodes which together enable measurement of an electrocardiogram (ECG) on the human chest with minimal discomfort. The capacitive sensing method was employed to prevent direct ECG measurement on the skin and also to provide maximum convenience to the user. Also, low power integrated circuits (ICs) and passive electrodes were employed in this research to reduce the power consumption of the entire system. Small flexible electrodes were placed into cotton pockets and affixed to the interior of a worn tight NIKE Pro combat T-shirt. Appropriate signal conditioning and processing were implemented to remove motion artifacts. The entire system was portable and consumed low power compared to conventional ECG devices. The ECG signal obtained from a 24 yr. old male was comparable to that of an ECG simulator.

Design of RBFNNs Pattern Classifier Realized with the Aid of Face Features Detection (얼굴 특징 검출에 의한 RBFNNs 패턴분류기의 설계)

  • Park, Chan-Jun;Kim, Sun-Hwan;Oh, Sung-Kwun;Kim, Jin-Yul
    • Journal of the Korean Institute of Intelligent Systems
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    • v.26 no.2
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    • pp.120-126
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    • 2016
  • In this study, we propose a method for effectively detecting and recognizing the face in image using RBFNNs pattern classifier and HCbCr-based skin color feature. Skin color detection is computationally rapid and is robust to pattern variation for face detection, however, the objects with similar colors can be mistakenly detected as face. Thus, in order to enhance the accuracy of the skin detection, we take into consideration the combination of the H and CbCr components jointly obtained from both HSI and YCbCr color space. Then, the exact location of the face is found from the candidate region of skin color by detecting the eyes through the Haar-like feature. Finally, the face recognition is performed by using the proposed FCM-based RBFNNs pattern classifier. We show the results as well as computer simulation experiments carried out by using the image database of Cambridge ICPR.

Contemporary Application of Roller Needle and Stamp Needle: A Patent Review (국내 특허 분석을 통한 롤러침 및 도장침의 현대적 활용)

  • Jeong, Seung-Yeon;Park, Ji-Yeun;Kim, Youn-Sub;Kim, Song-Yi
    • Korean Journal of Acupuncture
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    • v.36 no.3
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    • pp.139-149
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    • 2019
  • Objectives : A dermal needle is one of the therapeutic method by stimulating or tapping on the certain points of skin. Recently, roller or stamp-needle have been applied to various diseases in combination with microneedle technology. In this study, we analyzed the trend of roller and stamp-needle in Korean patent. Methods : Electronic search for Korean patent of roller or stamp needle was performed in Korea Intellectual Property Right Information Service database to April, 2019. Results : Sixty seven patents (51, roller-needle; 15, stamp-needle; 1, both types of needle) met the inclusion criteria. According to patent details, 34 of 67 patents were skin stimulation, 14 patents were intended to increase the efficiency of drug delivery through skin stimulation, 16 patents combined skin stimulation with technologies such as electrode or high frequency, and three patents applied both electrode or high frequency stimulation, and drug application as well as physical skin stimulation. Each of these patents aims to increase the efficiency of the needle manufacturing process (n=24), to facilitate the use of tools or to increase the efficiency of the technology (n=61), or to increase the technical skill of the needle itself (n=23). Conclusions : This study confirms that technological advances were being made by combining various types of stimuli to dermal needle and there have been attempts to expand the scope of drug delivery in terms of application of dermal needle. In the future, more research and development is needed in order to apply the dermal needle to modern technology.

Recent Research Trend in Skin-Inspired Soft Sensors with Multimodality (피부 모사형 다기능 유연 센서의 연구 동향)

  • Lee, Seung Goo;Choi, Kyung Ho;Shin, Gyo Jic;Lee, Hyo Sun;Bae, Geun Yeol
    • Journal of Adhesion and Interface
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    • v.21 no.4
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    • pp.162-167
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    • 2020
  • The skin-inspired multimodal soft sensors have been developed through multidisciplinary approaches to mimic the sensing ability with high sensitivity and mechanical durability of human skin. For practical application, although the stimulus discriminability against a complex stimulus composed of various mechanical and thermal stimuli experienced in daily life is essential, it still shows a low level actually. In this paper, we first introduce the operating mechanisms and representative studies of the unimodal soft sensor, and then discuss the recent research trend in the multimodal soft sensors and the stimulus discriminability.

A study on skin temperature distribution of the human body as fundamental data for developing heat energy harvesting clothing (열전에너지 수확 의류를 위한 인체표면 온도분포의 기초적 고찰)

  • Yang, Jin-Hee;Cho, Hyun-Seung;Park, Sun-Hyung;Lee, Joo-Hyeon
    • Science of Emotion and Sensibility
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    • v.14 no.3
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    • pp.435-444
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    • 2011
  • The development of ubiquitous healthcare technology and portable electronic devices requires new energy sources for providing continuous power supply. This study particularly focuses on an energy harvesting system capable of charging energy using clothing. One of the sources for energy harvesting is heat energy, which is the difference in temperature of the body and the surrounding environment. In this study, the skin temperature distribution of the human body was empirically measured to determine the basic materials needed to develop heat energy harvesting clothing. The distribution of skin temperature in different sections of the human body was analyzed. The analysis found that the skin temperature of the upper body was higher than that of the lower body. The area close to the heart with a lot of blood flow was especially high. The skin temperature of the back side of the body, such as the back of the neck, upper back, and waist, was higher than that of the front side of the body. As for the arms, the skin temperature of the upper arms was higher than that of the lower arms, and the skin temperature of the back side of the arms was lower than that of the front and the flank side of the arms. The difference in the average skin temperature and the environment temperature was highest at the back of the neck, and thereby is considered to be the most appropriate section to integrate the heat energy harvesting function and structure. The following sections had the next highest difference in values, listed in descending order: the back of the waist, the sides of shoulders, the front chest area, the front side of the upper arms, and the front abdomen. Based on the skin temperatures of the different sections of the human body, this study outlines the basic guidelines for developing heat energy harvesting clothing.

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A Study on Preprocessing Improvement Method for Face Recognition

  • Lim, Yang-Koo;Chae, Duck-Jae;Rhee, Sang-Bum
    • 제어로봇시스템학회:학술대회논문집
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    • 2003.10a
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    • pp.1782-1787
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    • 2003
  • A face recognition is currently the field which many research have been processed actively. But many problems must be solved the previous problem. First, We must recognize the face of the object taking a location various lighting change and change of the camera into account. In this paper, we proposed that new method to find feature within fast and correct computation time after scanning PC camera and ID card picture. It converted RGB color space to YUV. A face skin color extracts which equalize a histogram of Y ingredient without the Luminance. After, the method use V' ingredient which transforms V ingredient of YUV and then find the face feature. The result of the experiment shows getting correct input face image from ID Card picture and camera.

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Multiple Face Tracking System Using the Kalman Estimator Based on the Color SSD Algorithm (컬러 SSD 알고리즘 기반 칼만 예측기를 이용한 다수의 얼굴 검출 및 추적 시스템)

  • Kim, Byoung-Ki;Han, Young-Joon;Hahn, Hern-Soo
    • Proceedings of the IEEK Conference
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    • 2005.11a
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    • pp.347-350
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    • 2005
  • This paper proposes a new tracking algorithm using the Kalman estimator based color SSD algorithm. The Kalman estimator includes the color information as well as the position and size of the face region in its state vector, to take care of the variation of skin color while faces are moving. Based on the estimated face position, the color SSD algorithm finds the face matching with the one in the previous frame even when the color and size of the face region vary. The features of a face region extracted by the color SSD algorithm are used to update the state of the Kalman estimator.

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Real-time Face Tracking Method Robust to Occlusion (가려짐에 강인한 실시간 얼굴추적 방 법)

  • Lee, Jun-Hwan;Jung, Hyun-Jo;Yoo, Ji-Sang
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2016.06a
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    • pp.25-28
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    • 2016
  • 본 논문에서는 실시간 얼굴 추적을 위하여 기존의 CamShift 알고리즘의 단점을 보완한 새로운 CamShift 알고리즘을 제안한다. 배경 내 추적 객체와 색상이 유사한 객체가 존재할 경우 기존 CamShift 알고리즘은 불안정한 추적을 보여준다. 이러한 문제점을 화소 단위로 거리정보를 획득할 수 있는 Kinect 의 깊이 정보와 HSV 색공간 기반의 피부색 후보영역을 추출하는 Skin Detection 알고리즘을 이용하여 색상분포만 이용하는 기존의 CamShift 의 단점을 보완한다. 또한 추적하던 객체가 사라지거나 가려짐이 발생할 경우에도 다시 추적할 수 있는 특징점 기반의 매칭 알고리즘을 통하여 차폐영역에 강인한 특성을 가지게 한다. 이러한 향상된 CamShift 알고리즘을 사람의 얼굴 추적에 적용함으로써 다양한 분야에 활용 가능한 강인한 얼굴추적 알고리즘을 제안하고자 한다. 실험결과 제안하는 알고리즘은 기존의 추적 알고리즘인 TLD 보다 월등히 빠른 처리속도와 더 우수한 추적성능을 보여주었고, CamShift 보다 조금 느리지만 기존의 CamShift 가 가지고 있는 문제점들을 해결하였다.

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Metal Object Detection System for Protecting the Driver in Car (내부 운전자 보호를 위한 금속물체 탐지 시스템)

  • Kim, Jin-Kyu;Joo, Young-Hoon;Park, Jin-Bae
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.1843_1844
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    • 2009
  • 본 논문에서는 영상처리 기술을 기반으로 한 내부 운전자에게 위협이 될 수 있는 금속 물체를 탐지하기 위한 실시간 시스템을 제안한다. 제안된 시스템은 퍼지 이론을 이용하여 금속물체를 탐지할 수 있는 색상 필터를 설계하여 사용하였다. 차량안의 특정 탐지 영역 내에서 FCF(Fuzzy Skin Filter)를 이용하여 운전자의 얼굴 영역을 탐지하고, 동승자가 위협을 가한다는 가정 하에 손 영역을 탐지한다. 탐지된 동승자의 손 영역을 중심으로 색상기반 원형 탐색기법을 사용하여 최종 금속물체의 후보영역을 설정하고, 금속물체 색상필터를 적용하여 최종적인 금속물체영역을 탐지 한다. 제안된 방법은 여러 실험을 통해 내부 운전자 보호를 위한 금속물체 탐지 시스템의 우수성을 증명한다.

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An Electronic Auscultation System Design using a Polymer Based Adherent Differential Output Sensor (Polymer based adherent differential output sensor를 이용한 전자 청진 시스템 설계)

  • 한철규;고성택;최민주
    • Journal of the Institute of Convergence Signal Processing
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    • v.2 no.1
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    • pp.108-112
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    • 2001
  • Heart sound contains rich information regarding the dynamics of the heart and the auscultation has been a first choice of routine procedures for diagnosis of the heart. However, heart sounds captured using a conventional stethoscope are not often loud or clear enough for doctors to precisely classify their characteristics, especially, under the noisy environments of the hospital. A simple auscultation device that removed shortcomings of the conventional stethoscope was constructed in the study. The device employed a polymer based adherent differential output sensor which was on contact with skin through a coupling medium and appropriated electronic circuits for signal amplification and conditioning An ordinary headphone is taken to hear the captured heart sounds and the volume can be adjusted to hear well. It is also possible that the device sends the captured heart sound signals to a PC where the signals are further processed and viualized.

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