An Affordable open-source multifunctional upper-limb prosthesis with intrinsic actuation

Fajardo, Julio; Ferman, Victor; Lemus, Ali; Rohmer, Eric

doi:10.1109/arso.2017.8025206

Cited by 20 publications

(14 citation statements)

References 23 publications

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“…In this manner, the MCU can run multiple processes concurrently, allowing scalability, modularity and reliability to the system. Thus, it can easily adapt to different control strategies, as well as different UPIs, providing multiple ways to interpret the user intent through the use of one or more types of transducers, such as in [17], [18], [26], [27], [37]. On the other hand, since sEMG is still one of the most reliable methods to activate the functionalities of prosthetic devices (despite of its well-known issues) and, taking into account that it is relatively easy to build or acquire an affordable version of this kind of sensor, three custom PCB boards were designed, the control board and two signal conditioning ones, in order to achieve a self-contained embedded controller that provides fitting versatility to subjects with different amputation degrees.…”

Section: Electrical Designmentioning

confidence: 99%

“…A simple on-off sEMG controller based on time-domain features that triggers transitions of a Finite-State Machine (FSM) (in Section V) was designed in order to implement an intuitive user-friendly interface, allowing to achieve more customized hand actions without requiring long periods of training from the user [18].…”

Section: A Semg Control Designmentioning

confidence: 99%

“…8. In order to collect useful sEMG data from the patient's stump and sense the biopotentials of muscular fibers during different actions, an output signal span in the range of 0 V to 3.3 V and a bandwidth between 0 Hz to 500 Hz was considered [18], [45], [46]. 2) sEMG SIGNAL PROCESSING…”

Section: ) Semg Signal Acquisition and Conditioningmentioning

confidence: 99%

“…The functionality for this version, similar to the work presented in [18], is illustrated in the FSM in Fig. 12.…”

Section: ) Multimodal Approach Using Buttons and Myo Interfacementioning

confidence: 99%

“…This encourages its widespread distribution through global networks by reducing manufacturing costs. That is why the implementation of said technology in assistive devices has been increasing; improving availability, pricing and can also offer an extended set of grasps [14]- [16], [18].…”

Section: Introductionmentioning

confidence: 99%

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Galileo Hand: An Anthropomorphic and Affordable Upper-Limb Prosthesis

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The strict development processes of commercial upper-limb prostheses and the complexity of research projects required for their development makes them expensive for end users, both in terms of acquisition and maintenance. Moreover, many of them possess complex ways to operate and interact with the subjects, influencing patients to not favor these devices and shed them from their activities of daily living. The advent of 3D printers allows for distributed open-source research projects that follow new design principles; these consider simplicity without neglecting performance in terms of grasping capabilities, power consumption and controllability. In this work, a simple, yet functional design based on 3D printing is proposed, with the aim to reduce costs and manufacturing time. The operation process consists in interpreting the user intent with electromyography electrodes, while providing visual feedback through a µLCD screen. Its modular, parametric and self-contained design is intended to aid people with different transradial amputation levels, despite of the socket's constitution. This approach allows for easy updates of the system and demands a low cognitive effort from the user, satisfying a trade-off between functionality and low cost. It also grants an easy customization of the amount and selection of available actions, as well as the sensors used for gathering the user intent, permitting alterations to fit the patients' unique needs. Furthermore, experimental results showed an apt mechanical performance when interacting with everyday life objects, in addition to a highly accurate and responsive controller; this also applies for the user-prosthesis interface.

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