New Invention Profile
| Publication No: | IN202411041712 [India] | Application No: | IN202411041712 |
| Title: | An ultra-stretchable, flexible, soft strain sensor and process of fabrication thereof | ||
| Publication Date: | 19-12-2025 | File Date: | 29-05-2024 |
| Inventor(s): | Nripen Chanda; Soumen Sen; Soumen Mandal; Deepak Pandey; Aman Arora; Sagnik Choudhury | ||
| IPC Classification: | B25J9/14, G01B7/16, B25J15/00, B25J15/12, C08K3/04 | ||
| Abstract: | A soft strain sensor (1) and fabrication process for making comprises a sponge, multiwall carbon nanotubes (MWCNTs) (5), copper end-clamps, copper wires (9), and an elastomer (11) based encapsulation layer. The process of fabrication is easy and involves low-cost materials. The invention provides a uniform distribution of MWCNTs inside the elliptical pores of the sensor and the adhesion of the MWCNTs to the sponge matrix. Electrical characterization results indicate a stretching span of 600% with minimal hysteresis and fast dynamic response. The sensor displays excellent drift response, resolution of 2% strain at lower stretching limits, and repeatability of more than 10,000 stretch-release cycles. The strain sensor shows ~1% response variations with temperature fluctuations within 50°C and is found to be water-resistant and improved sensitivity (1.5 to 3.1) suitable for voice-activated technologies, speech recognition, human-machine communication applications. The invention has applications in soft robotic, human motion analysis, wearable healthcare devices. |
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:https://www.cmeri.res.in