• Title/Summary/Keyword: Wheelchair user

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Freelz: An EMG-Based Power Wheelchair Controller for the Tetraplegic (Freelz: 중증척수장애인을 위한 근전도 기반의 전동 휠체어 제어 시스템)

  • Jeong, Hyuk;Kim, Jong-Sung;Son, Wook-Ho;Kim, Young-Hoon
    • Proceedings of the IEEK Conference
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    • 2006.06a
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    • pp.823-824
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    • 2006
  • The Freelz is an EMG (ElectroMyoGraphy)-based controller for the tetraplegic utilizing a power wheelchair by teeth-clenching. The EMG signals activated by teeth-clenching are acquired around user's temples. The controller contains hardwares and softwares for acquiring EMGs, classifying patterns, and controlling a power wheelchair. Also, a comparison test is executed with a conventional controlling method for the tetraplegic.

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Study on the Aid Control Algorithm for the Power-Assisted Smart Wheelchair (힘 보조형 스마트 휠체어를 위한 차량 제어 알고리즘 구현)

  • Kong, Jung-Shik
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.12 no.8
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    • pp.3360-3365
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    • 2011
  • This paper deals with method to measure the user's driving-will force and to control the power-assisted wheelchair. To solve this problem, we extract the user's driving-will by using the mathematical motor model. And then, we get the linear and angular velocity at the center of the vehicle. Wheel velocities are also measured from center velocity. Finally, power-assisted electric wheelchairs are controlled by these data. Here all processes are verified by simulation.

The design & implementation of intelligent motorized wheelchair (지능형 전동 휠체어의 설계 및 구현)

  • 강재명;강성인;김정훈;류홍석;김관형;이상배
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 2002.05a
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    • pp.10-13
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    • 2002
  • In this study, we used a 16-bit microprocessor, 80C196KC for a control part in order to develop a multi-functional wheel-chair system, and implemented a joy-stick to control this system. For the complete system, we used a commercial electromotive wheelchair as a basic plant, and applied an encoder to get the rotating number of the motor to transfer data to the MCU to control the motor. We used PWM (Pulse Width Modulation) method to control the wheel-chair motor where a H-bridge circuit was configured. We used the fuzzy control algorithm for the operation of DC motor, which was attached to the electromotive wheelchair and manipulated following the change of the joystick position while a user was controlling the Joystick. He also could control the speed and direction of DC motor as well as control position information.

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Research of Smart Integrated Control Board Function Improvement for Personal Electric Wheelchair's Safe Driving (1인용 전동휠체어의 안전 운행을 위한 지능형 통합 제어보드 기능 개선 연구)

  • Kim, Jinsul;Cho, Young-Bin
    • Journal of Digital Contents Society
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    • v.19 no.8
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    • pp.1507-1514
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    • 2018
  • The purpose of this study was to propose a functional improvement solution of integrated control board for safe driving of Smart electric wheelchair for a single person. In the case of existing electric wheelchair products in Korea and elsewhere, safety-related functions or devices are not included in many cases. Therefore, the incidence of electric wheelchair-related accidents is continuously increasing in the current situation in which the elderly and the disabled people have been continuously increased. However, currently only high and middle-priced products are equipped with basic safety devices in electric wheelchairs, so low-priced products require safety related functions. Therefore, sensing obstacles that the user can not recognize while moving an electric wheelchair and detecting automatically the terrain change to control the motor by developing a smart control platform. This provides an integrated control board that can be applied to various electric wheelchairs for more stable driving.

The Development and Usability Testing of the Smart Home for Wheelchair Users - Focus on the Activities of Daily Living at Home - (휠체어 사용 장애인을 위한 스마트홈 구축 및 사용성평가 - 주거 환경 내 일상생활활동을 중심으로 -)

  • Lim, Myungjoon;Pyo, Kyung-Sun;Lee, KuemJu;Park, Jiyoung;Choi, Hyun;Kweon, Hyosun
    • Journal of the HCI Society of Korea
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    • v.11 no.2
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    • pp.5-14
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    • 2016
  • Wheelchair users found difficulties in living independently in their houses due to the lack of accessibility. The state of the art smart home technology may enable wheelchair users to live independently. In this study, we built a smart home, and tested its usability with three community dwelling wheelchair users. Three evaluation methods such as scenario-based test, K-IADL(Korea instrumental activity of daily living) test, and in-depth interview were used. All three users responded positively for using the smart home. Through this study, we also found several necessary amendments in building smart homes for wheelchair users.

The Effect of Shoulder Pain on the Quality of Life of Manual Wheelchair Users With Spinal Cord Injuries (수동휠체어를 사용하는 척수손상자의 어깨통증이 삶의 질에 미치는 영향)

  • Lee, Jung Kyu;Kang, Mo Yeol;Jeon, Eun Mi
    • Therapeutic Science for Rehabilitation
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    • v.12 no.3
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    • pp.33-44
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    • 2023
  • Objective : The purpose of this study was to identify the risk factors for shoulder pain in manual wheelchair users with spinal cord injuries and to explore the correlation between shoulder pain and quality of life. Methods : Out of 182 participants initially included, 168 were selected for analysis. The questionnaire had 41 questions, with 15 on the Wheelchair User's Shoulder Pain Index (WUSPI) and 26 on the World Health Organization Quality of Life-BREF (WHOQOL-BREF). Results : It was found that participants' scored 50.75 in the WUSPI, whereas they scored higher in mobility and overhead activity. In addition, participants' WHOQOL-BREF scored 70.48, with a mean score of 2.71, which was lower than ordinary adults' WHOQOL-BREF (mean: 3.11) and that of older people suffering from chronic musculoskeletal system pain (total score: 77.92). Conclusion : The participants' WUSPI showed negative correlations with all items, including the total scores on the WHOQOL-BREF. This suggests that the participants' shoulder pain had a negative impact on their quality of life. Therefore, clinical experts, including occupational therapists, should provide manual wheelchair users with spinal cord injuries with programs aimed at preventing and managing shoulder pain, thereby contributing to improving their quality of life.

Development of Smart Wheelchair System and Navigation Technology For Stable Driving Performance In Indoor-Outdoor Environments (실내외 환경에서 안정적인 자율 주행을 위한 스마트 휠체어 시스템 및 주행 기술 개발)

  • Lee, Lae-Kyoung;Oh, Se-Young
    • Journal of the Institute of Electronics and Information Engineers
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    • v.52 no.7
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    • pp.153-161
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    • 2015
  • In the present study, as part of the technology development (Quality of Life Technology, QoLT) to improve the socio-economic status of people with disabilities as an extension of these studies, we propose the development of the smart wheelchair system and navigation technology for stable and safe driving in various environments. For the disabled and the elderly make driving easy and convenient with manual/autonomous driving condition, we firstly develop the user-oriented smart wheelchair system with optimized sensors for environment recognition, and then we propose a navigation framework of a hierarchical structure to ensure real-time response, as well as driving stability when traveling to various environmental changes, and to enable a more efficient operation. From the result of several independent experiments, we ensure efficiency and safety of smart wheelchair and its navigation system.

A Study on Apply of Smart Sensors for Wheelchair Balancing Control (휠체어 균형 조정을 위한 스마트 센서의 적용에 관한 연구)

  • Ma, Linh Van;Cho, Young-bin;Kim, Jinsul
    • Journal of Digital Contents Society
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    • v.19 no.8
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    • pp.1585-1592
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    • 2018
  • Due to un-balancing weight allocation on the wheelchair the existing wheelchair system are faced with the risk of flipping or falling when a wheelchair goes up to a hill. In to order to be safer during riding the wheelchair, in this paper, we proposed a real-time new solution using the integrated Gyro Sensor and Tilt Sensor for controlling the balance. Because the typical property of wheelchair is for the special user who meets the difficulty in moving on foot the maintain the balance of wheel-chair systems have become important and helpful. In our method, we calculate the seat angle using information from Tilt Sensor. However, due to the law of inertia when a wheelchair is moving there is a deviation in the output value of Tilt Sensor. Therefore, we have to optimize the value of the angle by utilizing the acceleration that is the output of the Gyro Sensor. We took the advantages by using the combination of Gyro and Tilt sensors. Moreover, we also solved the consumption issue of the whole system. Through various experimentations with usage of ZigBee sensor module, the power consumption for the balancing system is reduced significantly.

Development of a hip model for impact testing of bedsore prevention cushions (욕창예방 방석의 충격시험용 둔부 모형 개발)

  • JUNG, SUNGBAE;YUK, SUNWOO;Ki-Won Choi;Sangsoo Park
    • The Journal of the Convergence on Culture Technology
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    • v.10 no.3
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    • pp.7-11
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    • 2024
  • The bedsore prevention cushion serves to prevent the skin on the buttocks of a wheelchair user from being damaged through friction with the wheelchair seat. This is because it absorbs some of the weight applied to the wheelchair seat and allows the weight to be applied evenly to the entire contact surface. For the impact test, which is part of the performance testing of bedsore prevention cushions, a hip model that represents the sitting posture of a wheelchair user is required. In this study, a hip model was manufactured for impact testing of bedsore prevention cushions for wheelchairs. Performance tests for pressure bedsore prevention cushions for wheelchairs include KSP 0236, a Korean standard, and KS P ISO 16840-2, an ISO international standard. The hip model proposed in KS P ISO 16840-2 was more suitable for impact testing of bedsore prevention cushions for wheelchairs. However, the guidelines for making hip models proposed by international standards need to be modified to reflect the advancement of model making technology and use easier methods. We propose a new hip model production method that produces a hip model out of plastic all at once and additionally attaches SS-41 steel plates processed into the shape of the hip to make the mass of the model similar to the human body.

An User-Friendly Kiosk System Based on Deep Learning (딥러닝 기반 사용자 친화형 키오스크 시스템)

  • Su Yeon Kang;Yu Jin Lee;Hyun Ah Jung;Seung A Cho;Hyung Gyu Lee
    • Journal of Korea Society of Industrial Information Systems
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    • v.29 no.1
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    • pp.1-13
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    • 2024
  • This study aims to provide a customized dynamic kiosk screen that considers user characteristics to cope with changes caused by increased use of kiosks. In order to optimize the screen composition according to the characteristics of the digital vulnerable group such as the visually impaired, the elderly, children, and wheelchair users, etc., users are classified into nine categories based on real-time analysis of user characteristics (wheelchair use, visual impairment, age, etc.). The kiosk screen is dynamically adjusted according to the characteristics of the user to provide efficient services. This study shows that the system communication and operation were performed in the embedded environment, and the used object detection, gait recognition, and speech recognition technologies showed accuracy of 74%, 98.9%, and 96%, respectively. The proposed technology was verified for its effectiveness by implementing a prototype, and through this, this study showed the possibility of reducing the digital gap and providing user-friendly "barrier-free kiosk" services.