스트레치 센서를 이용한 스쿼트 시 발목 가동범위 체크 센서 양말에 관하여 -20대 후반 남성을 중심으로

송관우,박진희,김주용 한국패션비즈니스학회 2022 패션 비즈니스 Vol.26 No.2

The purpose of this study is to develop socks to check the range of ankle movement during squats for men in their late 20s. Sensors of 6, 8, and 12 mm were selected, and each sample was impregnated 1 to 3 times. It was prepared using a CNT dispersion, and the GF value was measured using UTM. Among them, the sample with 2 impregnation showed the best GF value. As a result of applying each sample to the socks, the 12 mm sensor was wider than the area of the Achilles tendon, resulting in noise, and the 8 mm sensor was higher than the tensile strength of the socks, resulting in a decrease in the graph. Therefore, testing was performed using a 6 mm sensor. In order to determine the effectiveness of the sensor, the normal operating range was checked through squats, and significant changes were confirmed when the operating range was checked again through squats by performing operations that can increase the operating range through Gastrocnemius, Soleus stretching, and low lunge. Using the results of this study, it is expected that the average value of the ankle movement range of the user is checked prevent injury, to be provided as basic data for the production of shoe products and the promotion of physical health.

텍스타일형 스트레치 센서를 이용한 스마트 축구 양말 개발 -14~15세 여중생을 중심으로-

김지선,박진희,김주용 한국패션비즈니스학회 2020 패션 비즈니스 Vol.24 No.3

This study aimed to produce fiber stretch sensors for smart soccer socks to prevent injuries during training. A sensor was manufactured with stretchable fabric and tested to ensure convenience during training. In order to manufacture the fiber stretch sensor, a CNT dispersion solution was applied to an e-band and elastic polyester fabric, and the performance of the sensors was evaluated by a tensile test. Performance evaluation showed that both of the tested fabrics are excellent for this purpose. Both sensors were attached to socks to create prototype wearable devices, and an experiment was conducted to determine whether a resistance change accompanying relaxation and contraction of the gastrocnemius muscle could be detected. In order to accurately evaluate performance as a sensor, the fabric was stretched 20 times at low speeds of 1 Hz and 0.5 Hz. A change in resistance due to tension was observed, with both the E-band and the stretchable poly fabric showing high sensitivity and high reproducibility. Both can be used as relaxation/contraction sensors. Smart soccer socks were made using the two materials, and an evaluation was conducted. Tensile tests were done on the smart soccer socks; the tests were done 20 times per sock, and the sensor showed a stable resistance change between 30 and 40 ohms depending on the tension of the sensor. As a result, we confirmed that smart soccer socks with stretch sensors made of E-bands can measure changes in the gastrocnemius muscle.

거북목 예방을 위한 텍스타일 센서 개발

김민석,박진희,김주용 한국패션비즈니스학회 2023 패션 비즈니스 Vol.27 No.4

This study aimed to develop a smart wearable device for assessing the risk angle associated with turtle neck syndrome in patients with Video Display Terminal (VDT) syndrome. Turtle neck syndrome, characterized by forward head posture resulting from upper cross syndrome, leads to thoracic kyphosis. In this research, a stretch sensor was used to monitor the progression of turtle neck syndrome, and the sensor data was analyzed using a Universal Testing Machine (UTM) and the Gauge Factor (GF) calculation method. The scapula and cervical spine angles were measured at five stages, with 15-degree increments from 0° to 60°. During the experimental process, the stretch sensor was attached to the thoracic spine in three different lengths: 30mm, 50mm, and 100mm. Among these, the attachment method yielding the most reliable data was determined by measuring with three techniques (General Trim Adhesive, PU film, and Heat Transfer Machine), and clothing using the heat transfer machine was selected. The experimental results confirmed that the most significant change in thoracic kyphosis occurred at approximately 30° of forward head posture. Prolonged deformity can lead to various issues, highlighting the need for textile sensor solutions. The developed wearable device aims to provide users with real-time feedback on their turtle neck posture and incorporate features that can help prevent or improve the condition.

고령층 근로자들을 위한 팔꿈치 착용형 로봇의 개발

이석훈(Seok-Hoon Lee),이시행(Si-Haeng Lee),김정엽(Jung-Yup Kim) 대한기계학회 2015 大韓機械學會論文集A Vol.39 No.6

본 논문은 고령화되는 현대 사회에서 고령층 근로자들의 팔꿈치 근력 보조를 위한 웨어러블 로봇의 개발에 대해서 서술하였다. 기존에 연구 개발된 다양한 웨어러블 로봇들은 착용자가 사용하기에 가격, 휴대성 측면 뿐만 아니라 느린 착용자 의도 파악에 단점들이 있어왔다. 본 논문에서는 이러한 문제들을 최소화하기 위해 다음과 같은 특징을 강조하였다. 첫째, 양팔 작업 시 가장 많은 모멘트를 받는 팔꿈치 관절에만 구동기를 부착하여 무게와 부피 및 가격을 줄이고 실용성을 높였다. 둘째, 웨어러블 로봇의 작동을 추종 모드와 근력 증강 모드로 나누고, 본 연구에서 개발한 상박 근력 측정 장치로부터 착용자의 의지를 실시간 파악하여 모드가 자동적으로 전환 될 수 있도록 하였다. 이로부터 빠른 착용자 의도 파악과 동작 전환이 가능하도록 하였다. 개발된 로봇을 이용하여 무 부하 시 착용자의 모션 추종 성능을 측정하고, 부하 시 EMG (Electromyography) 센서로부터 상박의 근력을 측정함으로써 착용자의 근력 보조 성능을 실험적으로 입증하였다. 결과적으로, 초당 120 도의 모션 추종 성능과 60% 이상의 근력 보조 성능을 얻을 수 있었다. This paper describes the development of a wearable robot to assist the elbow muscle for use by elderly workers in aging societies. Various previously developed wearable robots have drawbacks in terms of their price, portability, and slow recognition of the wearer"s intention. In this paper, emphasis is placed on the following features to minimize these drawbacks. The first feature is that an actuator is attached only at the elbow joint that withstands the highest moment during arm motion to reduce the weight, volume, and price of the robot and increase its practicality. The second is that operation of the wearable robot is divided into two modes, a tracking mode and a muscle strengthening mode, and the robot can automatically switch between these modes by analyzing the wearer"s intention through the brachial muscle strength measuring device developed in this study. The assistive performance of the developed wearable robot is experimentally verified by motion tracking experiments without an external load and muscle strengthening experiments with an external load. During the muscle strengthening experiments, the power of the muscle of the upper arm is measured by a commercial electromyography (EMG) sensor. Motion tracking performance at a speed of 120°/s and muscle assistance of over 60 % were obtained using our robot.

허벅지 운동능력 측정을 위한 스트레치 센서 개발

장진철 ( Jinchul Jang ),박진희 ( Jinhee Park ),김주용 ( Jooyong Kim ) 한국패션비즈니스학회 2021 패션 비즈니스 Vol.25 No.5

This study aimed to produce sensors for measuring thigh motor skills. A textile stretch sensor was manufactured using a CNT(Carbon Nano Tube) 0.1 wt% water SWCNT(Single-Walled Carbon Nano Tube) solution, and different designs were applied to increase the sensitivity of the sensor, and different GF(Gauge Factor) values were compared using UTM devices. The same design was applied to fabrics and weaves to observe changes in performance according to fibrous tissue, and the suitability of sensors was determined based on tensile strength, elongation, and the elongation recovery rate. Sensitivity was found to vary depending upon the design. Thus the manufactured sensor was attached to a pair of fitness pants as a prototype, divided into lunge position and squat position testing, and the stretch sensor was used to measure thigh movements. It was shown that stretch sensors used to measure thigh motor skills should have light and flexible features and that elongation recovery rates and tensile strength should be considered together. The manufactured stretch sensor may be applicable to various sports fields that use lower limb muscles, wearable healthcare products, and medical products for measuring athletic ability.