Feem ntau cov neeg hlau ua tiav kev tuav thiab tactile sensing los ntawm motorized txhais tau tias, uas yuav ua tau heev loj thiab nruj. Ib pawg Cornell University tau tsim txoj hauv kev rau cov neeg hlau mos kom hnov nws ib puag ncig sab hauv, zoo ib yam li tib neeg ua.
Ib pawg coj los ntawm Robert Shepherd, tus pab xibfwb ntawm mechanical thiab aerospace engineering thiab tus thawj xibfwb ntawm kev tshawb nrhiav. Organic Robotics Lab, tau luam tawm ib daim ntawv piav qhia txog yuav ua li cas stretchable optical waveguides ua raws li curvature, elongation thiab quab yuam sensors nyob rau hauv ib tug mos robotic tes.
Tus kws kho mob tub ntxhais kawm Huichan Zhao yog tus thawj coj ntawm "Optoelectronically Innervated Mos Prosthetic Tes ntawm Stretchable Optical Waveguides,” uas yog featured nyob rau hauv lub debut tsab ntawm Science Robotics. Daim ntawv luam tawm Kaum Ob Hlis 6; kuj tau pab yog cov kws kho mob cov tub ntxhais kawm Kevin O'Brien thiab Shuo Li, ob leeg ntawm Shepherd's lab.
Zhao tau hais tias "Feem ntau cov neeg hlau niaj hnub no muaj cov sensors nyob sab nraud ntawm lub cev uas pom cov khoom ntawm qhov chaw," Zhao hais. "Peb cov sensors tau koom ua ke hauv lub cev, yog li lawv tuaj yeem kuaj pom lub zog raug xa mus los ntawm cov tuab ntawm cov neeg hlau, zoo li peb thiab txhua yam kabmob ua thaum peb hnov mob, piv txwv li."
Optical waveguides tau siv txij li xyoo 1970s thaum ntxov rau ntau lub luag haujlwm, suav nrog tactile, txoj haujlwm thiab acoustic. Fabrication Ameslikas yog txheej txheem nyuaj, tab sis qhov tshwm sim dhau 20 xyoo dhau los ntawm cov lithography mos thiab 3-D luam ntawv tau coj mus rau kev txhim kho elastomeric sensors uas tau yooj yim tsim thiab muab tso rau hauv daim ntawv thov neeg hlau.
Shepherd cov pab pawg tau ua haujlwm plaub-kauj ruam lithography txheej txheem los tsim cov tub ntxhais (los ntawm lub teeb propagates), thiab cladding (sab nrauv ntawm lub waveguide), uas tseem muaj lub tsev LED (lub teeb-emitting diode) thiab photodiode.
Qhov ntau ntawm tes prosthetic deforms, lub teeb ntau ploj los ntawm cov tub ntxhais. Qhov kev poob qis ntawm qhov sib txawv, raws li tau pom los ntawm photodiode, yog qhov tso cai rau cov pob qij txha "sens" nws qhov chaw nyob ib puag ncig.
Shepherd tau hais tias "Yog tias tsis muaj lub teeb poob thaum peb khoov lub pob qij txha, peb yuav tsis tau txais cov ntaub ntawv hais txog lub xeev ntawm lub sensor," Shepherd hais. "Tus nqi poob yog nyob ntawm seb nws khoov li cas."
Cov pab pawg siv nws cov optoelectronic prosthesis los ua ntau yam haujlwm, nrog rau kev tuav thiab kev sojntsuam rau ob qho tib si cov duab thiab kev ntxhib los mos. Qhov tshwj xeeb tshaj yog, txhais tes tau luam theej peb lub txiv lws suav thiab txiav txim siab, los ntawm softness, uas yog lub ripest.
Zhao tau hais tias cov thev naus laus zis no muaj ntau lub peev xwm siv tshaj li cov khoom siv tes ua, suav nrog cov tshuab bio-inspired robots, uas Shepherd tau tshawb nrhiav nrog. Mason Peck, Associate Professor ntawm Mechanical and Aerospace Engineering, siv rau hauv kev tshawb nrhiav qhov chaw.
Shepherd tau hais tias, "Txoj haujlwm ntawd tsis muaj cov lus pom zoo," Shepherd hais, hais txog kev koom tes nrog Peck, "tab sis yog tias peb muaj cov sensors, peb tuaj yeem saib xyuas lub sijhawm ntawm cov duab hloov pauv thaum sib xyaw [los ntawm cov dej electrolysis] thiab txhim kho kev ua kom zoo dua ua ntu zus los ua. nws txav nrawm dua. "
Kev ua haujlwm yav tom ntej ntawm optical waveguides hauv cov neeg hlau mos yuav tsom mus rau qhov muaj peev xwm hnov ntxhiab, hauv ib feem los ntawm 3-D luam ntawv ntau dua cov duab sensor, thiab los ntawm kev siv tshuab kev kawm raws li ib txoj hauv kev ntawm decoupling signals los ntawm ntau tus sensors. "Tam sim no," Shepherd tau hais tias, "Nws nyuaj rau kev txheeb xyuas qhov twg los ntawm qhov kov."
Txoj haujlwm no tau txais kev txhawb nqa los ntawm cov nyiaj pab los ntawm Air Force Office of Scientific Research, thiab tau siv los ntawm Cornell NanoScale Science thiab Technology Facility thiab cov Cornell Center for Materials Research, ob qho tib si yog kev txhawb nqa los ntawm National Science Foundation.
- Tom Fleischman, Cornell University