Figure 2 - uploaded by Thomas Schauer
Content may be subject to copyright.
Source publication
This work describes an application programming interface (API) for the commercially available 8 channel stimulator MOTIONSTIM8. The stimulator for trans- cutaneous FES applications is manufactured by the company Medel GmbH (Hamburg, Germany) and certified for clinical use. By use of the API, customised stimulation programs can be developed, includi...
Similar publications
Abstract For more than a decade now, interactive graphics has been shaped by triangle rasterization technology and the corresponding OpenGL graphics API Since recently, however, interactive ray tracing is becoming a reality, and is slowly becoming available on several different hardware platforms Due to its superior scalability, usability and effic...
Successfully completing a project on time is often a difficult task especially when the project is not well defined. This paper demonstrates the application of Axiomatic Design principles to shape and direct a multidisciplinary project from initial conception to the final tested product. This product is Chessmate: a small robot which plays chess on...
Citations
... In some applications, the central logic also uses sensing signals, i.e., feedback obtained from the stimulated tissue, labeled as Sens. in Fig. 1, to determine pulse parameters and gait the sequence of the stimulation [14], [15]. In less complex applications, a simpler user interface can be used without biofeedback [16]. ...
This paper introduces a highly flexible multichannel output stage for battery-powered portable electric stimulators (ESs), based on novel power converter architecture. Compared with other solutions, the presented output stage for transcutaneous (surface) stimulations increases the number of applicable therapies, improves the battery operating time through reduced power consumption, and potentially results in more comfortable and shorter healing therapies. The new hybrid switch-mode power converter is a combination of flyback and switched-capacitor (SC) topologies. The flyback steps up the battery voltage and provides galvanic isolation. The following power-efficient SC stage replaces lossy linear current sources (CSs) of conventional solutions and produces pulses with a much higher slew rate, reducing the pulse energy needed to cause the stimulus. The SC also inherently produces pulses with zero-net charge, eliminating bulky blocking capacitors and/or dedicated discharging circuits. The regulation of the amplitudes of the pulses is performed with a new digital voltage-programmed current mode controller, forcing the output of the SC stage to behave as a CS. The flexible digital controller allows for creation of various types of pulses and also features several levels of patient protection. An experimental prototype of the output stage has undergone proof of principle tests with able-bodied individuals. The results show that the new output stage produces pulses with a 1-mA/ns slew rate, about two orders of magnitude higher than the other known solutions. The trials show that the faster slew rate pulses generate the same muscle contraction with 34% lower amplitudes, reducing energy consumption by 55%, allowing longer battery life of portable ES applications.
... The stimulator, shown in Figure 2-17, has a keypad with a display for choosing a stimulation program. Although program [39]. Also, the product is intended to be portable, but with its weight, dimensions, connector and cabling make it impractical as a portable system. ...
MotiMove is a battery‐powered general‐purpose transcutaneous functional electrical stimulator (tFES) that comes out of more than 40‐year academic research at the University of Belgrade, Serbia. MotiMove can be used for therapeutic intervention, clinical research, and support of fitness training in different application modes (cycling, rowing, grasping, walking, and exercising). Unlike other commercially available tFES devices, it allows real‐time open or closed‐loop control of stimulation parameters to 8 separate current sources from a multitude of sensors. Recent studies with MotiMove in healthy people and people with motor diseases have shown the applicability of the MotiMove stimulator for different users in various environments. Future development will focus on FES clothes with dry interface electrodes and integrated sensors that combined with MotiMove will make a compact easy‐donning testbed for real‐time FES control algorithms. Applications of MotiMove multi‐channel FES stimulator for Cycling, Rowing, Walking and Grasping.
This paper introduces novel functional electrical stimulation (FES) system architecture. Compared to the existing state of the art solutions [1]-[15], the presented FES system drastically increases variety of stimulation pulses, results in a less painful therapy and has significantly lower power consumption. Furthermore, the FES system inherently provides zero net charge of stimulated tissue eliminating the need for a dedicated discharging circuit. The key element of the FES is a novel power stage merging a flyback and switch-capacitor (SC) converters. The flyback steps up battery voltage and provides galvanic isolation. The following SC stage produces zero net charge high slew-rate pulses reducing pain sensation. The control of the output current pulses is performed through integrated digital voltage-programmed current mode control. The new FES system was tested with able bodied individuals. The results show that it produces pulses with a 10 ns rise time, which compared to other known solutions, result in the same muscle force output for 30+% less stimulation energy. The results also show that the presented FES system requires 60% less energy compared to other known systems allowing longer battery life in portable applications.
