https://scx1.b-cdn.net/csz/news/tmb/2023/new-technology-for-rob.jpg” data-src=”https://scx2.b-cdn.net/gfx/news/hires/2023/new-technology-for-rob.jpg” data-sub-html=”Schematic illustration of the flexible and stretchable sEMG sensors designed for amputees. a sEMG sensor attached to different types of muscles in the legs. The red boxes show graphically implemented images, and the blue box presents a picture of the fabricated sEMG sensor. b Muscle parts are activated at different times depending on the gait phase. c Specific description of the electrode layer and base layer of the sEMG sensor. The yellow dotted line indicates the boundary of each side. d Microscopically photographed surfaces of P-PDMS according to the citric acid concentration (scale bar, 1 mm). e Graph for the breathability test of P-PDMS (e, n = 20 samples for WVTR, and n = 3 samples for thickness, data presented as mean ± s.d.). f Graph of the stress-strain curve of the substrate layer. The calculated tensile stress is 253.85 kPa, and Young’s modulus is 145.38 kPa. Credit: npj Flexible Electronics ( 2023 ). DOI: 10.1038/s41528-023-00282-z”> < div data-thumb =" https://scx1.b-cdn.net/csz/news/tmb/2023/new-technology-for-rob.jpg" data-src=" https://scx2.b-cdn.net/gfx/news/hires/2023/new-technology-for-rob.jpg" data-sub-html=" Schematic illustration of the versatile and elastic sEMG sensing units developed for amputees. a sEMG sensing unit connected to various kinds of muscles in the legs. The red boxes reveal graphically carried out images, and the blue box provides an image of the made sEMG sensing unit. b Muscle parts are triggered at various times depending upon the gait stage. c Specific description of the electrode layer and base layer of the sEMG sensing unit. The yellow dotted line suggests the limit of each side. d Microscopically photographed surface areas of P-PDMS according to the citric acid concentration(scale bar, 1 mm). e Graph for the breathability test of P-PDMS(e, n=20 samples for WVTR, and n= 3 samples for density, information provided as mean ± s.d.). f Graph of the stress-strain curve of the substrate layer. The determined tensile tension is 253.85 kPa, and Young's modulus is 145.38 kPa. Credit: npj Flexible Electronics (2023). DOI: 10.1038/ s41528-023-00282-z” >
Schematic illustration of the versatile and elastic sEMG sensing units created for amputees. a sEMG sensing unit connected to various kinds of muscles in the legs. The red boxes reveal graphically executed images, and the blue box provides an image of the produced sEMG sensing unit. b Muscle parts are triggered at various times depending upon the gait stage. c Specific description of the electrode layer and base layer of the sEMG sensing unit. The yellow dotted line suggests the limit of each side. d Microscopically photographed surface areas of P-PDMS according to the citric acid concentration (scale bar, 1 mm). e Graph for the breathability test of P-PDMS(e, n = 20 samples for WVTR, and n = 3 samples for density, information provided as mean ± s.d.). f Graph of the stress-strain curve of the substrate layer. The determined tensile tension is 253.85 kPa, and Young’s modulus is 145.38 kPa. Credit:npj Flexible Electronics (2023). DOI: 10.1038/ s41528-023-00282-z
A research study group led by Professor Sang-hoon Lee at the Department of Robotics and Mechatronics Engineering, Daegu Gyeongbuk Institute of Science and Technology has actually effectively established an imperceptive surface area electromyography (sEMG) sensing unit. The sensing unit is essential in enabling lower limb amputees to manage robotic prosthetic legs as they desire and is anticipated to contribute significantly to rehab and a much better lifestyle.
With the current increase in way of life illness such as diabetes, there is a quickly growing variety of extra lower limb amputees. The irreversible impacts of lower limb amputation are not just handicap however likewise mental special needs. To tackle this issue, bionic lower limb innovation has actually been established in the last few years to change a lost leg with robotic prosthetics.
The most essential thing in establishing robotic prosthetic legs is to stably carry out the lower limb function as planned by amputees, and in order to do so, the capability to quickly and precisely get the amputees’ biological signals is needed. The most appropriate approach is to utilize non-invasive sEMG sensing units; nevertheless, these sensing units are challenging to utilize in practice.
The sensing unit needs to lie inside the silicone liner of the socket to tape electromyographic signals. The silicone liner is extremely narrow, it produces a damp environment, and it is affected by the socket, which is subject to strong vibrant motions due to the weight of a robotic prosthetic leg. This makes it difficult to stably tape muscles’ biological signals for an extended time period without damage to the sensing unit itself.
In this context, a research study group led by Professor Sang-hoon Lee at DGIST established an imperceptive sEMG sensing unit, a biointerface formed