Optical Fiber Sensor Performance Evaluation in Soft Polyimide Film with Different Thickness Ratios

To meet the application requirements of curvature measurement for soft biomedical robotics and flexible morphing wings of aircraft, the optical fiber Bragg grating (FBG) shape sensor for soft robots and flexible morphing wing was implemented. This optical FBG is embedded in polyimide film and then fixed in the body of a soft robot and morphing wing. However, a lack of analysis on the embedded depth of FBG sensors in polyimide film and its sensitivity greatly limits their application potential. Herein, the relationship between the embedded depth of the FBG sensor in polyimide film and its sensitivity and stability are investigated. The sensing principle and structural design of the FBG sensor embedded in polyimide film are introduced; the bending curvatures of the FBG sensor and its wavelength shift in polyimide film are studied; and the relationship between the sensitivity, stability, and embedded depth of these sensors are verified experimentally. The results showed that wavelength shift and curvature have a linear relationship. With the sensor’s curvature ranging from 0 m−1 to 30 m−1, their maximum sensitivity is 50.65 pm/m−1, and their minimum sensitivity is 1.96 pm/m−1. The designed FBG sensor embedded in polyimide films shows good consistency in repeated experiments for soft actuator and morphing wing measurement; the FBG sensing method therefore has potential for real applications in shape monitoring in the fields of soft robotics and the flexible morphing wings of aircraft.

Robotic Technologies and Fundamental Rights

Robotic technologies?constructed systems that interact with their environment in a way that displays some level of agency?are increasingly intertwined with human life and human bodies. This raises many regulatory questions, since current legal frameworks have few robotics-specific provisions and robotics pose new challenges to legal notions and underlying assumptions. To help guide the regulation of robotics, fundamental rights should provide a basic touchstone. However, the constitutional framework of fundamental rights is itself not immune to being influenced by robotics. This paper discusses how the protection of fundamental rights is affected by robotics technologies, taking into account the mutual-shaping process of fundamental rights, regulation, and technology. After a general overview of how fundamental rights are challenged by robotics technologies, we zoom in on three specific application domains: industrial robotics and the issue of workers' rights and liability, assistive technology with a focus on autonomy and privacy of elderly and disabled people, and biomedical robotics (including brain-machine interfaces) in relation to informed consent and self-determination. The analysis highlights diverse implications of robotics in light of fundamental rights and values, suggesting that regulators will have to deal with rights and value conflicts arising from robotics developments. To help address these conflicts, a set of shared norms, standards and guidelines could be developed that may, in the form of soft-law, serve as a bridge between abstract fundamental rights and concrete robotics practice.