직물 센서의 모양과 부착 위치가 사지 동작 센싱 의류의 센싱 성능에 미치는 영향

조현승,양진희,전동진,이주현,Cho, Hyun-Seung,Yang, Jin-Hee,Jeon, Dong-Jin,Lee, Joo-Hyeon 한국감성과학회 2017 감성과학 Vol.20 No.3

본 연구에서는 E-textile 기반 신축성 센서의 모양과 부착 위치가 동작 센싱 성능에 미치는 영향을 분석하고, 이를 통해 인체 동작 센싱에 가장 적합한 의복 구조 요건을 규명하고자 하였다. 실험 대상 아동에게 센서의 모양과 부착 위치에 따라 조작된 실험복을 착의시킨 후 60 deg/sec의 속도로, $60^{\circ}$, $90^{\circ}$, $120^{\circ}$의 동작 각도별로 팔과 다리의 굽힘, 폄 동작 의한 직물 센서의 신장과 수축에 따른 전압의 변화량을 측정하였으며, 가속도 센서를 함께 부착하여 동작의 일치도를 검증하였다. 또한 아동의 모형 팔과 다리를 제작하여 이를 대상으로 동일한 실험을 수행함으로써 인체의 팔, 다리의 동작 실험 결과와 비교하였다. 분석 결과 센서의 모양에서는 모형 대상 실험과 아동 대상 실험 모두에서 보트형의 센서 보다 장방형의 센서가 더 균일하고 안정적인 경향을 보여 재현성과 신뢰성이 높은 것으로 나타났다. 센서의 부착 위치는 모형 대상 실험에서는 팔꿈치와 무릎의 관절부로부터 4 cm 아래 지점에 부착된 경우, 아동 대상 실험에서는 팔꿈치와 무릎의 관절부에 위치했을 때 재현성과 신뢰성이 더 높았다. 본 연구에서는 아동의 사지 동작 측정에 적합한 센서를 개발하고 동작 센싱에 적합한 센서의 모양과 부착 위치의 조건을 분석하였으며, 의복에 통합된 유연한 직물 센서를 활용하여 인체 부위별 동작 센싱이 가능하다는 것을 규명하였다. The purpose of this study was to analyze the effect of the shape and attached position of E-textile-based stretchable sensors on motion-sensing performance and to investigate the requirements for the optimal structure of clothes for sensing limb motions. An experimental garment was prepared with different sensor shapes, and attachment positions. A child subject, wearing the experimental garment, performed arm and leg bending and extension motions at $60^{\circ}$, $90^{\circ}$ and $120^{\circ}$ motion angles, at a rate of 60 deg/sec. The changes in voltage triggered by the stretching and contracting of the fabric-sensor were measured, and an acceleration sensor was utilized to verify that the experimental motions were correctly performed. Dummy arms and legs of a child were manufactured to perform an identical test, in order to compare the dummy results with the actual human body experiment results. The analysis showed that the reproducibility and reliability of the rectangular sensor, showing uniform and stable were higher than those of the boat-shaped sensor, in both the dummy and the human body experiments. The attachment position of the sensor was more reproducible and reliable when placed on 4 cm below the elbow and knee joints in the dummy test, when placed in the joints of the elbow and knee, in children experiment. The appropriate shapes and attached positions of the sensor for sensing the motions were analyzed, and the results proved that motion-sensing of the human body is possible by utilizing flexible fabric-sensors integrated into clothes.

재난관리역량 강화를 위한 고위험 재난유형 및 대상지역 선정방안에 관한 연구

조현승(Cho, Hyun Seung),최우정(Choi, Woo Jung),임상규(Rheem, Sang Kyu) 한국방재안전학회 2016 한국방재안전학회 학술대회 논문집 Vol.2016 No.-

본 연구는 효율적 재난관리역량 강화를 위하여 지자체(시·도 및 시·군·구)에서 최우선으로 분석해야 할 고위험재난유형 및 분석대상지역 선정을 돕는 가이드라인 개발에 목적이 있다. 미국의 Comprehensive Preparedness Guide, CPG201(포괄적 재난대비 안내서) 내 Threat and Hazard Identification and Risk Assessment(위협·위험요소 파악 및 위험평가)의 1단계 과정인 Identify the Threats and Hazards of Concern(지역사회에 상당한 영향을 끼치는 위협 및 위험요소 파악)을 근거로 울산광역시의 사례적용을 위해 국내 정부기관 보고서인 재난연감, 재해연보 및 각종 통계자료 분석과 사회적 합의 도출 과정을 진행하였다. 이를 통해 : ① 재난관리역량강화 대상지역 선정 방안, ② 울산광역시내 지역재난발생 위험분석, ③ 분석대상지역 선정협의 도출 과정, ④ 고위험 재난유형 선정 협의 도출 과정 등, 분석대상 고위험 재난유형 및 지역 선정 프로세스를 제시한다. 또한 최종결과로써 울산광역시 내역량강화대상지역 및 고위험재난유형을 제시한다. The purpose of this study is to develop a guideline which could help local autonomous entities to enhance their disaster management capabilities efficiently. Based on the Threat and Hazard Identification and Risk Assessment(THIRA) process I of the Comprehensive Preparedness Guide(CPG201) from the Homeland Security, USA, we deduced a social agreement about selecting the target area and types of disasters in Ulsan Metropolitan City, South Korea by analyzing the government reports such as “재난연감”, “재해연보” and varieties of statistical data, and providing the result to a consultative group (consisting of local emergency managers, related field experts, police, 119 rescue and etc.). In addition, this research suggests the most reasonable and acceptable means of selecting a target area and types of high risk disasters to analyze by conducing the following process : ① the measures to select a target area to enhance its disaster management capabilities, ② the risk analysis on local disasters in Ulsan Metropolitan City, ③ the procedure of deducing social agreement for selecting a target area to analyze ④ the procedure of deducing social agreement for selecting types of high risk disasters and etc. Moreover, this research provides the target area and the types of disasters that Ulsan Metropolitan City should be most concerned to analyze about.

동작 모니터링을 위한 웨어러블 센싱 및 피드백 제품 디자인 개발

조현승 ( Hyun-seung Cho ),양진희 ( Jin-hee Yang ),이강휘 ( Kang-hwi Lee ),이정환 ( Jeong-hwan Lee ),박서연 ( Su-youn Park ),최형익 ( Hyeong-ik Choi ),전학수 ( Hak-su Jeon ),이주현 ( Joo-hyeon Lee ) 한국감성과학회 2018 감성과학 Vol.21 No.3

The objective of this study was to develop clothing-type wearable motion sensing and feedback systems to enhance children’s sports by promoting visual and audio feedback. In this study, several applications, such as fabric sensors, sportswear integrated with various types of fabric sensors, and fabric-based motion sensing module design, as well as a visual and audio feedback system for gaining a better understanding of a child’s interest in a type of exercise, were developed. An SWCNT-based stretchable fabric sensor was developed for motion sensing, and sportswear was designed using the fabric sensor that was integrated into the limbs of the garment. The sensing module was developed, and sensory performance was evaluated through a joint motion experiment for children. In addition, using the feedback system that was developed in the form of an accessory, the responses of light and sound were also examined based on the movement of the child who was wearing the sportswear prototypes. This study focused on the development and assessment of prototype designs for children's sportswear and accessory products that can help to ascertain a child’s interest in a particular exercise.

소비자 감성을 기반으로 한 꽃문양 스카프 디자인의 레이아웃 기법 제안: 제2보

조현승 ( Hyun Seung Cho ),이주현 ( Joo Hyeon Lee ) 한국감성과학회 1999 추계학술대회 Vol.1999 No.-

본 연구의 제 2보에서는 꽃문양 스카프 디자인의 레이아웃 변인에 따른 소비자 감성을 분석하였던 제 1보의 내용을 검증하고, 이러한 결과를 토대로 하여 꽃문양 스카프 디자인을 위한 지침과 디자인 프로토타입을 제시하였다. 본 연구에서는 꽃문양 스카프 디자인에 있어 레이아웃 기법 전개에 관련된 감성 지표를 얻음으로써 사변적 또는 미학적 접근이 주류를 이루었던 기존의 스카프 디자인 연구 분야에 새로운 감성과학적 접근방법을 모색하였다.

동작 모니터링 스마트 의류를 위한 직물 센서의 성능 평가: 더미 실험을 중심으로

조현승 ( Hyun Seung Cho ),박선형 ( Sun Hyeong Park ),강다혜 ( Da Hye Kang ),이강휘 ( Kang Hwi Lee ),강승진 ( Seung Jin Kang ),한보람 ( Bo Ram Han ),오정훈 ( Jung Hoon Oh ),이해동 ( Hae Dong Lee ),이주현 ( Joo Hyeon Lee ),이정환 ( 한국감성과학회 2015 감성과학 Vol.18 No.4

TThis study explored the requirement of fabric sensor that can measure the motion of the joint effectively by measuring and analyzing the variation in electric resistance of a sensor in accordance with bending and stretching motion of the arm by the implementation of a motion sensor utilizing conductive fabric. For this purpose, on both sides of two kinds of knitted fabric, namely ``L`` fabric and ``W`` fabric Single Wall Carbon Nano-Tube(SWCNT) was coated, fabric sensor was developed by finishing them in a variety of ways, and the sensor was attached to the arm band. The fabric sensor consisted of total 48 cases, namely background fabric for coating, the method of sensor attachment, the number of layer of sensors, the length of sensor, and the width of sensor. The performance of fabric motion sensors in terms of a dummy arm, that is, a Con-Trex MJ with 48 arm bands around it was evaluated. For each arm band, a total of 48, fastened around the dummy arm, it was adjusted to repeat the bending and stretching at the frequency : 0.5Hz, ROM : 20°~120°, the voltage was recorded for each case after conducting three sets of repeat measurement for a total of 48 cases. As a result of the experiment, and as a consequences of the evaluation and analysis of the voltage based on the uniformity of the base line of the peak-to-peak voltage(Vp-p), the uniformity of Vp-p within the same set, and the uniformity of the Vp-p among three sets, the fabric sensors that have been configured in SWCNT coated ``L`` fabric / welding / two layers / 50×5㎜, 50×10㎜, 100×10㎜, and SWCNT coated ``W`` fabric / welding / two layers / 50×10㎜ exhibited the most uniform and stable signal value within 5% of the total variation rate. Through all these results of the experiment, it was confirmed that SWCNT coated fabric was suitable for a sensor that can measure the human limb operation when it was implemented as a fabric sensor in a variety of forms, and the optimal sensor types were identified.

스마트 의류 상품 기획을 위한 감성 효과 분석

조현승 ( Hyun Seung Cho ),김정호 ( Jung Ho Kim ),구혜란 ( Hye Ran Koo ) 한국감성과학회 2014 감성과학 Vol.17 No.3

This study aims at providing basic data for product planning to design smart clothing and to develop applications, focusing on consumers by satisfying their emotions through analyzing emotional factors on smart clothing, comparing emotional differences between conventional clothing and it, reviewing changes of consumers` emotion by integrating the product and clothing and researching differences of preference and purchase intention between smart clothing and traditional one. As the results of the study, emotional factors for smart clothing were analyzed with total 6 including ‘technical’, ‘comfort’, ‘aesthetic’, ‘modern’, ‘fun’ and ‘multiple’ factors. Among them, except for ‘comport’, five emotional factors showed emotional factors between conventional sport-casual clothing and smart clothing. That is, emotional factors of ‘technical’, ‘aesthetic’, ‘modern’, ‘fun’ and ‘multiple’ were emphasized more in smart clothing than conventional ones, indicating that they should be considered in planning products of smart clothing. Though there was no significant difference of preference between smart clothing and conventional clothing, in case of comparison of averages, that of smart clothing was a little higher. For purchase intention, smart clothing was lower than the conventional clothing. So preference seems to be not directly related to consumers` immediate purchase. To make consumers` interests and preference to result in purchase, it is necessary to develop smart clothing with more various applications and to prepare commercializing strategies. As the results of the analysis on free-descriptive questionnaire survey, consumers were interested in development of smart clothing to help diet with functions including energy harvesting from body motion, calorification and perspiration, measurement of motion and calory consumption as well as health-care type smart clothing to measure heartbeat and ECG. Reflecting these requirements from the consumers, they should be utilized as guidance to develop smart clothing in the future.

CNT 기반의 직물센서 구현 방법에 따른 관절동작 센싱 효율 평가

조현승 ( Hyun-seung Cho ),양진희 ( Jin-hee Yang ),이주현 ( Joo-hyeon Lee ) 한국감성과학회 2021 감성과학 Vol.24 No.4

This study aimed to determine the effects of the shape and attachment position of stretchable textile sensors coated with carbon nanotube on their performance when used to measure children's joint movements. Moreover, the child-safe requirements for fabric motion sensors are established. The child participants were advised to wear integrated clothing equipped with the sensors of various shapes (rectangular and boat-shaped) and attachment positions (at the knee and elbow joints or 4 cm below the joints). The voltage change induced by the elongation and contraction of the fabric sensors was determined for arm and leg flexion-extension motions at 60 deg/s (three measurements of 10 repeats each for 60°and 90°angles, for a total of 60 repetitions). Their dependability was determined by comparing the fabric motion sensors to the associated acceleration sensors. The experimental results indicate that the rectangular-shaped sensor affixed 4 cm below the joint is the most effective fabric motion sensor for measuring children's arm and leg motions. In this study, we designed a textile sensor capable of tracking children's joint motion and analyzed the sensor shape and attachment position on motion sensing clothing. We demonstrated that flexible fabric sensors integrated into garments may be used to detect the joint motions of the human body.

전자바우처 도입 이후 사회서비스 시장의 변화와 시장구조 결정요인 분석 -산모신생아 도우미 서비스를 중심으로

조현승 ( Hyun Seung Cho ),고대영 ( Dae Young Koh ),박문수 ( Moon Soo Park ) 한국산업조직학회 2013 産業組織硏究 Vol.21 No.3

본 연구는 산모신생아도우미 서비스를 대상으로, 전자바우처 제도 도입 후에야 가능해진 소비자들의 자유로운 제공기관 선택 및 전환이 보다 증가하는 방향으로 변화하였는지를 살펴보고, 전자바우처 제도 도입에 따른 소비자 선택권 강화가 사회서비스 시장구조에 어떤 변화를 가져왔는지를 분석하였다. 분석 자료로는 2008년 2월부터 2011년 12월까지의 기간에 해당하는 산모신생아도우미서비스 개인별 이용실적 전수자료를 토대로 재구성한 231개 시?군?구의 월별 시장 자료가 사용되었다. 한편, 소비자 선택권 강화가 사회서비스 시장구조에 어떤 변화를 가져왔는지를 추정하기 위해, 횡단면 회귀분석, 고정효과(fixed effect) 패널 모형과 함께 내생성 문제를 고려한 2단계 최소자승(2 stage least square) 고정효과 모형과 하우스만-테일러(Hausman-Taylor) 확률효과(random effect) 모형이 사용되었다. 분석결과, 아직은 산모신생아도우미 서비스 시장의 경쟁이 높은 수준이라고 평가하기는 어렵지만, 제도도입 이후 시장 집중도가 완화되고 있으며, 특히 예전에는 불가능했던 소비자들의 제공기관 전환이 지속적으로 증가하여 소비자의 제공기관 선택권이 강화된 것으로 나타났다. 또한, 소비자의 선택권의 대리변수인 소비자의 제공기관 전환 비율의 증가는 시장 집중도를 유의하게 감소시키는 것으로 나타났다. This study analyzed the effect of the introduction of the e-voucher system in the Mother-Infant Help Service. Prior to the introduction of e-vouchers, government social services were delivered through designated suppliers, without allowing beneficiaries any other options. However, with e-vouchers, consumers have been able to select service providers of their choosing, which has induced competition among social service providers. Panel data analysis was utilized to test the changes caused by the introduction of consumer options to select service providers. The result shows that the ratio of consumers who switched suppliers to the number of total users has been increasing since the introduction of the e-voucher system. Furthermore, allowing consumers to choose service providers by way of e-voucher programs was found to have a significant impact on reducing market concentration.

섬유 패턴 디자인의 요소 분석체계 개발 가능성

조현승 ( Hyun Seung Cho ),지상현 ( Sang Hyun Jee ),이주현 ( Joo Hyeon Lee ) 한국감성과학회 1998 춘계학술대회 Vol.1998 No.-

섬유 패턴 디자인의 감성 예측 모형을 개발하기 위한 전 단계로서 패턴 디자인 요소의 분석체계 개발 가능성을 이론적으로 검증하였다. 먼저 패턴 디자인의 최소 단위를 pattern primitive, 최소반복단위를 Repeated Pattern Unit로 개념화 한 후 ``PP들의``, ``RPU의``,그리고 ``RPU간의 특징``이라는 세개 영역에 걸쳐 24개의 지각적 특징들을 추출하였다. 24개의 지각적 특징들은 예비조사를 통해 섬유패턴 디자인을 충실히 기술할 수 있는 것으로 확인되었다. 추출된 지각적 특징들을 ``PP의 모양에 의한 돌출성``, ``PP의 색채에 의한 돌출성``, ``PP들 모양의 다양성``,``PP들의 변화도``, ``PP들 색채의 다양성``, ``PRU의 돌출정도``, ``PRU의 다양성``이라는 4개의 최상위 특징으로 수렴시키는 방식으로 위계화 하였다.

의복의 구성 요소가 생체신호 측정 성능에 미치는 효과

조현승(Cho, Hyun Seung),양진희(Yang, Jin Hee),송하영(Song, Ha Young),이주현(Lee, Joo Hyeon) 한국디자인문화학회 2020 한국디자인문화학회지 Vol.26 No.3

일상생활 중에 생체신호를 측정할 때, 착용자의 움직임으로 인해 동잡음이 발생하게 된다. 동잡음은 측정하고자 하는 신호의 노이즈로 작용하여 신호의 품질을 저하시킨다. 본 연구는 의류 고유의 속성을 유지하면서 심박센싱의 기능을 만족시키는 심박측정 의류의 개발을 위해 의복 구성 및 설계의 측면에서 동잡음을 감소시킴으로써 측정 성능을 향상시킬 수 있는 방안을 모색하고자 하였다. 의류의 구성 요소 중 디자인과 부자재를 사용하여 실험 1: 디자인 설계 유무(horizontal function modules 디자인 설계와 vertical function modules 디자인 설계를 함께 적용한 의복과 디자인을 달리 설계하지 않은 의복), 실험 2: 부자재 종류(논슬립 테입, 심지)가 동잡음 감소에 미치는 영향을 탐색하였다. 실험 1의 결과, 디자인을 설계한 심박측정 의류에서 측정된 신호의 품질이 설계하지 않은 의류보다 정적 상태와 동적 상태에서 모두 높았으며, 통계적으로도 유의미한 차이를 보여 동잡음 감소에 효과가 있는 것으로 나타났다. 실험 2의 결과, 신호품질 지수는 정적 상태와 동적 상태에서 논슬립 테입을 설계한 의류가 높았으나, 동적 상태에서는 통계적으로 유의미한 차이를 보이지 않았다. 본 연구는 생체신호 측정 시 발생하는 동잡음을 감소시키기 위해 의복 구성 및 설계의 관점에서 접근했다는 데 의의가 있다. When physiological signals are measured in daily life, motion artifacts occur due to the movement of the wearer. The motion artifacts affect the signal to be measured as noise, which degrades the quality of the signal. This study is aimed to investigate a method to reduce motion artifacts in terms of clothing for the development of heart rate sensing clothing that satisfies heart rate measuring function as well as maintaining the inherent characteristics of clothing. This study investigated the effects by Experiment 1: clothing without a function module, clothing with a single horizontal function module and vertical function modules at the side seams, and Experiment 2: types of sub-materials (non-slip tape, interlining) on the reduction of motion artifacts. According to the results from Experiment 1, the quality of the signal measured by the heart rate sensing clothing with the design module was higher than that of the clothing without the design module in both the static and dynamic states. According to the results from Experiment 2, the signal quality index was higher in the clothing with the non-slip tape in all conditions, showing no statistically significant difference in the dynamic state. This study is meaningful in proposing a method to reduce the motion artifacts occurring in the measurement of physiological signals in terms of clothing. The results could contribute to the design development of the heart rate sensing clothing.