• 패션비즈니스
• /
• 제25권5호
• /
• pp.99-113
• /
• 2021

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.

• 대한의용생체공학회:의공학회지
• /
• 제39권1호
• /
• pp.10-15
• /
• 2018

In this paper, we present a wearable measurement system for monitoring rounded shoulders. The system contains a shoulder correction band and a stretch sensor that can correct and measure shoulder posture, respectively. The capacitance of the stretch sensor changes linearly according to changes in the shoulders. To verify measurement, a motion analysis system was used as the reference to compare the change in the rounded angles of the shoulders and the change in the stretch sensor's capacitance. The results indicated that there is a high correlation between the two changes and the system can be used as a monitoring device for rounded shoulders.

• 패션비즈니스
• /
• 제24권3호
• /
• pp.17-29
• /
• 2020

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.

• 센서학회지
• /
• 제14권6호
• /
• pp.415-422
• /
• 2005

Using stretch sensors, a stuttering treatment training device that improve the abnormal breathing of stutterer was designed and developed. To improve stutterer's inadequate breathing method that is one of principal reason of stammering, the device estimates breathing method by checking the changes of the stretch sensor's resistances those are put on the chest and abdomen of user. And a vocal exercise program that carry out exercises only when the user maintains the abdominal breathing was designed. Using a PIC16C711 device that includes an A/D convertor, a main controller was designed and the vocal exercises software was developed using Director and C program with graphic user interface for user convenience. The controller sends the resistance data of sensors to PC through the serial port and the software verifies the breathing method. And the device was designed that the RTS (request to send) pin of serial port in PC is used as a power source so that it can work without any battery or other power source. Three stutterers have carried out the clinical experiments using the implemented device for two months and the results showed it was excellent to alleviate the stuttering.

• 감성과학
• /
• 제25권3호
• /
• pp.77-90
• /
• 2022

본 연구의 목적은 루어낚시 참여자의 손목 움직임 측정을 위한 스트레치 센서를 개발하는 것이다. 손목움직임 측정을 위해 스트레치 센서를 손목에 부착하여 배굴, 저굴 그리고 랜딩동작을 게이지율, 인장강도 그리고 신장회복률을 척도로 실험을 진행하였다. CNT 분산액을 이용한 전도성 센서를 개발하고 E-band에 동일한 조건으로 적용하였다. 함침을 각각 한 번, 두 번, 그리고 세 번한 같은 크기의 5종, 15가지 센서를 만능재료시험기(Dacell dn-fga Universal testing machine, UTM)를 활용해 게이지율(Gauge Factor)을 측정하였다. 두 번 함침한 센서가 게이지율이 가장 우수했으며, 게이지율과 인장강도가 높은 세 가지 센서로 프로토 타입을 제작하였다. 아두이노에 연결하여 동작테스트를 한 결과, 인장강도와 게이지율이 가장 높은 시료 1이 세 가지 동작에서 일정한 파장이 유지되었다. 시료 2,3은 배굴과 저굴에서는 일정한 파장을 나타내었지만, 랜딩동작에서는 신호 노이즈가 나타났다. 이는, 랜딩동작에서는 인장강도와, 게이지율에 따라 파장의 패턴이 다르게 나타나는 것을 알 수 있었다. 이와 같은 결과로 손목의 움직임 측정을 위한 스트레치 센서 제작시에 필요한 조건들을 유추할 수 있었다. 본 연구의 결과를 활용하여 루어낚시용 스마트 웨어러블 제품 개발에 응용이 가능할 것으로 사료된다.

• 패션비즈니스
• /
• 제27권4호
• /
• pp.125-140
• /
• 2023

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.

• 재활복지공학회논문지
• /
• 제3권1호
• /
• pp.7-13
• /
• 2009

최근 노인인구의 증가로 인해 고령자를 위한 보행 보조기에 대한 관심이 증가되고 있다. 하지만 대부분의 경우 동력이 없는 시스템으로 경사 등의 공간에서 취약성을 가지며, 사용자가 다리에 힘이 없을 경우 편하게 이동할 수 없다는 단점이 있다. 따라서 동력형 보행보조기에 대한 관심이 증가되고 있다. 대부분의 보행보조기의 사용자는 고령자 이며 사용이 간편하며 편리해야 한다. 따라서 본 논문에서는 사용자의 편리성 증진을 위해 다양한 센서 즉, 가변저항, 힘센서, 스트레치 센서 등을 사용하여 사용자의 보행의지를 파악하기 위한 장치를 개발하였다. 또한 개발된 장치에 대한 평가를 하기위해 센서의 응답성 및 복원성을 20ms단위로 측정하여 비교 평가하였다. 결과적으로 가변 저항형 핸들바의 응답성은 420ms 이며 복귀성은 380ms이고 힘센서를 이용한 핸들바 응답성은 320ms 이며 복귀성은 220ms이다. 스트레치 센서의 응답성은 160ms, 복귀성은 140ms으로 가장 뛰어난 것을 검증하였다.

• 패션비즈니스
• /
• 제26권2호
• /
• pp.129-142
• /
• 2022

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.

• 감성과학
• /
• 제24권4호
• /
• pp.69-78
• /
• 2021

요즘은 건강을 위한 스마트 헬스 케어 웨어러블의 개발이 가속화되는 시대이다. 그 중 활발한 연구 분야 중 하나인 EMS 전기자극을 활용한 웨어러블 제품이 많이 출시되었다. 하지만 연구되거나 출시되어있는 EMS 웨어러블은 근육의 세분화에 집중하지 못한 포괄적인 전신 슈트나 복부 전체를 덮는 벨트 형식으로 출시되어있다. 이에 본 연구에서는 특정 근육을 세분화시킨 EMS 패턴을 적용하고 복압 벨트에 호흡을 측정할 수 있는 스트레치 센서를 부착하여 두 가지 호흡법을 활용해 연구를 진행하고자 한다. 측정방법은 들숨과 날숨으로 실험을 진행하며 대상자는 건강한 신체의 20대 남성 10명을 대상으로 진행했다. 본 연구의 결과 흉식호흡과 복식호흡 모두 센서의 민감도는 5mm, 3mm, 기본 센서 순으로 센서별 순위 결과를 확인할 수 있었고 EMS 복압 벨트를 통해 전기자극을 적용 전, 후로 나누었을 때 전기자극을 적용한 후 호흡의 활성화가 향상되었음을 알 수 있었다. 연구의 결론은 2가지 호흡법을 신체 기능적 근거로 제작한 2가지 패턴으로 인해 호흡법에 적합한 전기자극을 적용 시 적용하지 않았을 때 보다 3가지 센서로 호흡 활성화 효과와 센서 간 민감도 차이를 확인할 수 있었다. 본 연구 결과를 기반으로 후속 연구에서는 EMS 패턴과 스트레치 센서가 통합된 의복형 웨어러블 제품에 실시간 모니터링이 가능한 호흡 스마트 의류를 개발하고자 한다.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2005년도 ICCAS
• /
• pp.1802-1807
• /
• 2005

Tangible interface can be understood as a newly defined concept, which can provide an effective and seamless interaction between the human as a subjective existence and the cyberspace as an objective existence. Tactile sensation is essential for many exploration and manipulation tasks in the tangible space. In this paper, we suggest the design of an integrated tactile sensor-display system that provides both of sensing and feedback with kinesthetic force, pressure distribution, vibration and slip/stretch. A new tactile sensor with PDVF strips and display system with bimorph actuators has been developed and integrated by developed signal processing algorithm. In the scenario of haptic navigation in the tangible space, tactile feedback system is successfully experimented.