The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform

H. Harry Asada - One of the best experts on this subject based on the ideXlab platform.

  • Wearable Conductive Fiber Sensors for Multi-Axis Human Joint Angle Measurements
    Journal of NeuroEngineering and Rehabilitation, 2005
    Co-Authors: Peter T Gibbs, H. Harry Asada
    Abstract:

    Background The practice of continuous, long-term monitoring of human joint motion is one that finds many applications, especially in the medical and rehabilitation fields. There is a lack of acceptable devices available to perform such measurements in the field in a reliable and non-intrusive way over a long period of time. The purpose of this study was therefore to develop such a wearable joint monitoring sensor capable of continuous, day-to-day monitoring. Methods A novel technique of incorporating Conductive Fibers into flexible, skin-tight fabrics surrounding a joint is developed. Resistance changes across these Conductive Fibers are measured, and directly related to specific single or multi-axis joint angles through the use of a non-linear predictor after an initial, one-time calibration. Because these sensors are intended for multiple uses, an automated registration algorithm has been devised using a sensitivity template matched to an array of sensors spanning the joints of interest. In this way, a sensor array can be taken off and put back on an individual for multiple uses, with the sensors automatically calibrating themselves each time. Results The wearable sensors designed are comfortable, and acceptable for long-term wear in everyday settings. Results have shown the feasibility of this type of sensor, with accurate measurements of joint motion for both a single-axis knee joint and a double axis hip joint when compared to a standard goniometer used to measure joint angles. Self-registration of the sensors was found to be possible with only a few simple motions by the patient. Conclusion After preliminary experiments involving a pants sensing garment for lower body monitoring, it has been seen that this methodology is effective for monitoring joint motion of the hip and knee. This design therefore produces a robust, comfortable, truly wearable joint monitoring device.

  • Wearable Conductive Fiber sensors for multi-axis human joint angle measurements
    Journal of NeuroEngineering and Rehabilitation, 2005
    Co-Authors: Peter T Gibbs, H. Harry Asada
    Abstract:

    The practice of continuous, long-term monitoring of human joint motion is one that finds many applications, especially in the medical and rehabilitation fields. There is a lack of acceptable devices available to perform such measurements in the field in a reliable and non-intrusive way over a long period of time. The purpose of this study was therefore to develop such a wearable joint monitoring sensor capable of continuous, day-to-day monitoring. A novel technique of incorporating Conductive Fibers into flexible, skin-tight fabrics surrounding a joint is developed. Resistance changes across these Conductive Fibers are measured, and directly related to specific single or multi-axis joint angles through the use of a non-linear predictor after an initial, one-time calibration. Because these sensors are intended for multiple uses, an automated registration algorithm has been devised using a sensitivity template matched to an array of sensors spanning the joints of interest. In this way, a sensor array can be taken off and put back on an individual for multiple uses, with the sensors automatically calibrating themselves each time. The wearable sensors designed are comfortable, and acceptable for long-term wear in everyday settings. Results have shown the feasibility of this type of sensor, with accurate measurements of joint motion for both a single-axis knee joint and a double axis hip joint when compared to a standard goniometer used to measure joint angles. Self-registration of the sensors was found to be possible with only a few simple motions by the patient. After preliminary experiments involving a pants sensing garment for lower body monitoring, it has been seen that this methodology is effective for monitoring joint motion of the hip and knee. This design therefore produces a robust, comfortable, truly wearable joint monitoring device.

  • ICRA - Wearable Conductive Fiber sensors for measuring joint movements
    IEEE International Conference on Robotics and Automation 2004. Proceedings. ICRA '04. 2004, 2004
    Co-Authors: P. Gibbs, H. Harry Asada
    Abstract:

    This paper describes a technique that uses Conductive Fibers as part of a wearable sensor for continuous monitoring of joint movements. Conductive Fibers are incorporated into flexible fabrics that fit tightly around a joint, and resistance changes in the Fibers caused by skin extension can be measured, and related to joint motion. An overview of the sensor design, including functional requirements and design parameters, are presented, as well as preliminary results from a prototype sensor design. A single-axis joint model is also presented to illustrate the implementation of an extended Kalman filter to estimate joint angle. The Kalman filter also estimates parameters associated with misalignment errors that may be created every time the subject takes off and puts on the wearable sensor, allowing a sensor to be calibrated only once, with no need for re-calibration for all future uses.

  • Wearable Conductive Fiber Sensors for Continuous Joint Movement Monitoring
    Dynamic Systems and Control Parts A and B, 2004
    Co-Authors: Peter T Gibbs, H. Harry Asada
    Abstract:

    This paper describes a technique that uses Conductive Fibers as part of a wearable sensor for continuous monitoring of joint movements. Conductive Fibers are incorporated into flexible, skin-tight fabrics that are comfortable and acceptable for long-term wear in everyday settings. Continuous monitoring of single or multi-axis joint movement is therefore possible, even when not in the presence of a therapist. A brief overview of the sensor design is presented, including functional requirements and important design parameters. Misalignment errors that may be created every time the subject takes off and puts on the wearable sensor are accounted for by incorporating an array of Fiber sensors around the joint and analyzing each sensor’s sensitivity to joint movement during use. This eliminates any need for re-calibration after an initial calibration.Copyright © 2004 by ASME

  • Wearable Conductive Fiber sensor arrays for measuring multi-axis joint motion
    The 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2004
    Co-Authors: P. Gibbs, H. Harry Asada
    Abstract:

    This paper describes a technique that uses Conductive Fibers as part of a wearable sensor for continuous monitoring of joint movements. Conductive Fibers are incorporated into flexible fabrics that are comfortable and acceptable for long-term wear in everyday settings. Continuous monitoring of single or multi-axis joint movement is therefore possible, even when not in the presence of a therapist. A brief overview of the sensor design is presented, including functional requirements and important design parameters. Misalignment errors that may be created every time the subject takes off and puts on the wearable sensor are accounted for by incorporating an array of Fiber sensors around the joint and analyzing each sensor's sensitivity to joint movement during use. This eliminates any need for re-calibration after an initial calibration.

Dae-eun Kim - One of the best experts on this subject based on the ideXlab platform.

Kenji Mase - One of the best experts on this subject based on the ideXlab platform.

  • e textile pressure sensor based on Conductive Fiber and its structure
    Ubiquitous Computing, 2013
    Co-Authors: Yu Enokibori, Yuuki Shimakami, Hirotaka Mizuno, Akihisa Suzuki, Kenji Mase
    Abstract:

    This paper proposes a novel e-textile-based pressure sensor. Textile is a common material in our life, used in such items as sheets, seats, and clothing. If these items are equipped with sensor functions, they can invisibly assist humans without significant lifestyle changes. Our sensor is suitable for mass production and durable in daily hard use cases. The sensor is woven with common weaving machines with a special manner and its material is a common low-cost Conductive Fiber that does not use special and costly materials, such as optical Fiber. The sensor mechanism is supported by the textile structure; thus our sensor has durability for frictional force and scratch occurring sometime in daily context. In this paper, we also introduce two example usages of our textile sensor: a bed-size body pressure sensor for anti-pressure-ulcer treatment and a wearable foot-pressure sensor for walk and skill analyses.

  • UbiComp (Adjunct Publication) - E-textile pressure sensor based on Conductive Fiber and its structure
    Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication - UbiComp '13 Adjunct, 2013
    Co-Authors: Yu Enokibori, Yuuki Shimakami, Hirotaka Mizuno, Akihisa Suzuki, Kenji Mase
    Abstract:

    This paper proposes a novel e-textile-based pressure sensor. Textile is a common material in our life, used in such items as sheets, seats, and clothing. If these items are equipped with sensor functions, they can invisibly assist humans without significant lifestyle changes. Our sensor is suitable for mass production and durable in daily hard use cases. The sensor is woven with common weaving machines with a special manner and its material is a common low-cost Conductive Fiber that does not use special and costly materials, such as optical Fiber. The sensor mechanism is supported by the textile structure; thus our sensor has durability for frictional force and scratch occurring sometime in daily context. In this paper, we also introduce two example usages of our textile sensor: a bed-size body pressure sensor for anti-pressure-ulcer treatment and a wearable foot-pressure sensor for walk and skill analyses.

Jaehong Lee - One of the best experts on this subject based on the ideXlab platform.

  • Highly Conductive Fiber with Waterproof and Self-Cleaning Properties for Textile Electronics
    ACS Applied Materials & Interfaces, 2018
    Co-Authors: Byungwoo Choi, Jungmok Seo, Jaehong Lee, Heetak Han, Janghoon Woo, Kijun Park, Taeyoon Lee
    Abstract:

    Major concerns in the development of wearable textile electronics are exposure to moisture and contamination. The exposure can cause electrical breakdown of the device and its interconnections, and thus continuous efforts have been made to fabricate textile electronics which are free from moisture and pollution. Herein, we developed a highly Conductive and waterproof Fiber with excellent electrical conductivity (0.11 Ω/cm) and mechanical stability for advanced interconnector components in wearable textile electronics. The fabrication process of the highly Conductive Fiber involves coating of a commercial Kevlar Fiber with Ag nanoparticle–poly(styrene-block-butadiene-block-styrene) polymer composites. The fabricated Fiber then gets treated with self-assembled monolayer (SAM)-forming reagents, which yields waterproof and self-cleaning properties. To find optimal SAM-forming reagents, four different kinds of reagents involving 1-decane thiol (DT), 1H,1H,2H,2H-perfluorohexanethiol, 1H,1H,2H,2H-perfluorodecylt...

  • Conductive Fiber‐Based Ultrasensitive Textile Pressure Sensor for Wearable Electronics
    Advanced Materials, 2015
    Co-Authors: Jaehong Lee, Hyukho Kwon, Seungbae Son, Ja Hoon Koo, Jae Hyung Kim, Yong Hoon Jang, Changhyun Pang, Jungmok Seo, Sera Shin, Dae-eun Kim
    Abstract:

    A flexible and sensitive textile-based pressure sensor is developed using highly Conductive Fibers coated with dielectric rubber materials. The pressure sensor exhibits superior sensitivity, very fast response time, and high stability, compared with previous textile-based pressure sensors. By using a weaving method, the pressure sensor can be applied to make smart gloves and clothes that can control machines wirelessly as human-machine interfaces.

  • Conductive Fiber-based ultrasensitive textile pressure sensor for wearable electronics
    Advanced Materials, 2015
    Co-Authors: Jaehong Lee, Hyukho Kwon, Seungbae Son, Ja Hoon Koo, Jae Hyung Kim, Yong Hoon Jang, Changhyun Pang, Jungmok Seo, Sera Shin, Dae-eun Kim
    Abstract:

    A flexible and sensitive textile-based pressure sensor is developed using highly Conductive Fibers coated with dielectric rubber materials. The pressure sensor exhibits superior sensitivity, very fast response time, and high stability compared with previous textile-based pressure sensors. By using a weaving method, the pressure sensor can be applied to make smart gloves and clothes which can control machines wirelessly as human-machine interfaces.

Yu Enokibori - One of the best experts on this subject based on the ideXlab platform.

  • e textile pressure sensor based on Conductive Fiber and its structure
    Ubiquitous Computing, 2013
    Co-Authors: Yu Enokibori, Yuuki Shimakami, Hirotaka Mizuno, Akihisa Suzuki, Kenji Mase
    Abstract:

    This paper proposes a novel e-textile-based pressure sensor. Textile is a common material in our life, used in such items as sheets, seats, and clothing. If these items are equipped with sensor functions, they can invisibly assist humans without significant lifestyle changes. Our sensor is suitable for mass production and durable in daily hard use cases. The sensor is woven with common weaving machines with a special manner and its material is a common low-cost Conductive Fiber that does not use special and costly materials, such as optical Fiber. The sensor mechanism is supported by the textile structure; thus our sensor has durability for frictional force and scratch occurring sometime in daily context. In this paper, we also introduce two example usages of our textile sensor: a bed-size body pressure sensor for anti-pressure-ulcer treatment and a wearable foot-pressure sensor for walk and skill analyses.

  • UbiComp (Adjunct Publication) - E-textile pressure sensor based on Conductive Fiber and its structure
    Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication - UbiComp '13 Adjunct, 2013
    Co-Authors: Yu Enokibori, Yuuki Shimakami, Hirotaka Mizuno, Akihisa Suzuki, Kenji Mase
    Abstract:

    This paper proposes a novel e-textile-based pressure sensor. Textile is a common material in our life, used in such items as sheets, seats, and clothing. If these items are equipped with sensor functions, they can invisibly assist humans without significant lifestyle changes. Our sensor is suitable for mass production and durable in daily hard use cases. The sensor is woven with common weaving machines with a special manner and its material is a common low-cost Conductive Fiber that does not use special and costly materials, such as optical Fiber. The sensor mechanism is supported by the textile structure; thus our sensor has durability for frictional force and scratch occurring sometime in daily context. In this paper, we also introduce two example usages of our textile sensor: a bed-size body pressure sensor for anti-pressure-ulcer treatment and a wearable foot-pressure sensor for walk and skill analyses.