Data files for Low-Cost Textile Myoelectric Control of KAFO paper

The use of surface electromyography (sEMG) for the detection of heel-strike and toe-off is investigated in order to control the knee joint of passive KAFOs. This has the potential to allow for the knee joint to bend during the swing and to lock during the stance of the supported leg. sEMG and motion capture experiments are run in India on three healthy participants were they are asked to perform a normal gait in a straight direction. These experiments are performed with embroidered electrodes which are a low-cost and reusable alternative to disposable gel electrodes. The event to predict are heel-strike and toe-off from the rest of the gait

Data for paper 'Hand-made embroidered electromyography towards a solution for low-income countries'

PLEASE NOTE: AN UPDATED VERSION OF THIS DATASET HAS BEEN PUBLISHED AT http://doi.org/doi:10.18742/RDM01-597This study presents the first work into the hand-sewing of electrodes for surface electromyography to assess its feasibility as an affordable, alternative means of production. In experiments reported here, batches of hand-sewn electrodes from Nm = 6 novice embroiderers are tested for (i) manufacturing consistency, and (ii) myographic data acquisition against conventional gelled and machine-sewn electrodes

Data for paper 'Hand-made embroidered electromyography towards a solution for low-income countries', version 2

This study presents the first work into the hand-sewing of electrodes for surface electromyography to assess its feasibility as an affordable, alternative means of production. In experiments reported here, batches of hand-sewn electrodes from Nm = 6 novice embroiderers are tested for (i) manufacturing consistency, and (ii) myographic data acquisition against conventional gelled and machine-sewn electrodes

Data files for Embroidered Electrodes for Control of Affordable Myoelectric Prostheses

This study reports an investigation into the use of embroidered electrodes for recording surface EMG data from amputees, and the feasibility of using that data as a discrete control interface for a prosthesis through classification of muscle patterns. During data recording, participants are asked to visualise performing one of four gestures with their ghost limb (corresponding to the desired movement of a prosthetic hand) while surface EMG data is collected using the textile-based system. The four classes of gesture are those most commonly used in human hand motion: fist contraction, index finger extension, wrist extension, wrist flexion.Total data size 54.3MB To make downloading quicker and easier the files are accessible as a single zipped folder (11.9MB

Identification of the Design Parameters for a Spacer Fabric Pressure-Mapping Sensor

This work presents an empirical study into the design of fabric pressure sensors, taking into account the electro-mechanical variability of spacer fabric. The saturation of the fabric sensor at high force levels is a major factor limiting the range of measurable pressures. In order to address this, experiments were carried out to investigate several methods of modifying the sensitivity characteristics through the layering and specifications of the textile sheets

Hand-Made Embroidered Electromyography: Towards a Solution for Low-Income Countries

Surface electromyography is used for non-invasive evaluations of the neuromuscular system and conventionally involves electrodes placed on the skin to collect electrical signals associated with muscle activity. Recently, embroidered electrodes have been presented as a low-cost alternative to the current commercial solutions. However, the high cost of equipment used in their fabrication forms a barrier to deployment. To address this, this paper presents the first study into the hand-sewing of electrodes for surface electromyography to assess its feasibility as an affordable, alternative means of production. In experiments reported here, batches of hand-sewn electrodes from six novice embroiderers are tested for (i) manufacturing consistency, and (ii) myographic data acquisition against conventional gelled and machine-sewn electrodes. First, the electrical properties of the created electrodes are assessed through simple resistance measurements. Then, linear regression is performed using electromyography data to test if force-variation detection is feasible. The results demonstrate that hand-sewn electrodes provide similar sensitivity to force variation as their machine-sewn counterparts according to the linear regression gradients calculated ( 8.84 using the hand-sewn electrodes and 9.38 using the machine-sewn electrodes, on the flexor muscles of the forearm). This suggests that hand-made, low-cost textile interfaces could be deployed using local production in developing economies

Data for paper 'Identification of the Design Parameters for a Spacer Fabric Pressure-Mapping Sensor’

Excel data for paper 'Identification of the Design Parameters for a Spacer Fabric Pressure-Mapping Sensor’. The data are experiment 1 result and experiment 2 result

Affordable embroidered emg electrodes for myoelectric control of prostheses:A pilot study

Commercial myoelectric prostheses are costly to purchase and maintain, making their provision challenging for developing countries. Recent research indicates that embroidered EMG electrodes may provide a more affordable alternative to the sensors used in current prostheses. This pilot study investigates the usability of such electrodes for myoelectric control by comparing online and offline performance against conventional gel electrodes. Offline performance is evaluated through the classification of nine different hand and wrist gestures. Online performance is assessed with a crossover two-degree-of-freedom real-time experiment using Fitts’ Law. Two performance metrics (Throughput and Completion Rate) are used to quantify usability. The mean classification accuracy of the nine gestures is approximately 98% for subject-specific models trained on both gel and embroidered electrode offline data from individual subjects, and 97% and 96% for general models trained on gel and embroidered offline data, respectively, from all subjects. Throughput (0.3 bits/s) and completion rate (95–97%) are similar in the online test. Results indicate that embroidered electrodes can achieve similar performance to gel electrodes paving the way for low-cost myoelectric prostheses