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Medidores de deformación ultra sensibles y resistentes para máquinas blandas
Oluwaseun A Araromi1, Moritz A Graule2, Kristen L Dorsey3
1John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA. oararomi@g.harvard.edu.
Nature
|November 12, 2020
Resumen
Los investigadores desarrollaron una nueva tecnología de sensores blandos (SCARS) que ofrece alta sensibilidad y resistencia para dispositivos portátiles. Este avance permite máquinas inteligentes y discretas interfaces hombre-computadora mediante la detección precisa de movimientos sutiles.
Área de la Ciencia:
- Ciencias de los materiales e ingeniería
- Robótica y sistemas blandos
- Tecnología portátil
Sus antecedentes:
- Las máquinas blandas requieren retroalimentación sensorial para una interacción inteligente con su entorno.
- Los medidores de tensión existentes carecen tanto de alta sensibilidad a tensiones bajas como de resistencia mecánica.
- Esto limita el despliegue de tecnologías de detección suave en aplicaciones del mundo real.
Objetivo del estudio:
- Desarrollar un mecanismo de transducción versátil y compatible para la detección de tensiones de alta sensibilidad.
- Para crear un sensor con alta sensibilidad y alta resistencia mecánica para sistemas blandos.
- Demostrar el potencial de esta tecnología en retroalimentación biomecánica portátil y interfaces hombre-ordenador.
Principales métodos:
- Introducción de contacto mediado por tensión en estructuras anisotrópicamente resistentes (SCARS).
- Cambios utilizados en el contacto ohmico entre meandros conductores anisotrópicamente microestructurados encapsulados por películas extensibles.
- Desarrolló una manga de brazo basada en textiles integrada con sensores para el reconocimiento de gestos.
Principales resultados:
- Se ha alcanzado una alta sensibilidad con factores de calibración superiores a 85.000.
- Se ha demostrado una alta resistencia mecánica adaptable a conductores de alta resistencia.
- Muestra una alta linealidad e insensibilidad a las deformaciones de flexión y torsión.
- Reconocimiento exitoso de gestos y movimientos continuos de la mano a través de la detección de movimiento muscular utilizando la manga del brazo.
Conclusiones:
- El mecanismo SCARS proporciona una solución de detección ultra sensible resistente y compatible.
- Esta tecnología supera las limitaciones de los mecanismos de detección actuales, permitiendo un despliegue más amplio.
- La tecnología SCARS tiene un potencial significativo para sistemas de retroalimentación biomecánica portátiles discretos y interfaces humano-computadora avanzadas.
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