| Full text | |
| Author(s): |
Fujiwara, Eric
;
Cabral, Thiago Destri
Total Authors: 2
|
| Document type: | Journal article |
| Source: | APPLIED OPTICS; v. 61, n. 23, p. 8-pg., 2022-08-10. |
| Abstract | |
We present a multi-point curvature sensor based on optical fiber specklegram measurements. Apart from the current approaches, the proposed system uses an ordinary multimode fiber excited with visible light as a reflection-type probe. Besides, this method discretizes the waveguide into segments connected by joints and assumes sequential bend events, simplifying the specklegram referencing for correlation analyses and avoiding laborious deep learning processing. Sensor characterization yielded a linear response with similar to 1.3 degrees resolution for single curvatures, whereas shape prediction experiments in the plane resulted in maximum errors of similar to 3.5 degrees and similar to 5.4 mm for angular and linear positioning, respectively. Furthermore, exploratory tests indicated errors < 2.3 degrees regarding probe curvatures in the space. This research introduces a feasible, straightforward alternative to the available shape sensors, enabling applications in medical probes and soft robotics. (C) 2022 Optica Publishing Group (AU) | |
| FAPESP's process: | 17/25666-2 - Development of an optical fiber force myography sensor for applications in human-robot interfaces |
| Grantee: | Eric Fujiwara |
| Support Opportunities: | Regular Research Grants |