Fiber Optic Sensor Moves Robot In Near Real-Time

NASA and Germany’s Fraunhofer have been exploring the uses of real-time, highly accurate measurement and control motion based on fiber optic sensing systems (FOSS).

Although not as prominent at this year’s 2020 CES, fiber optics sensing technology has been a highlight of past shows. Fiber optic sensing measures changes in the backscattered light in a fiber cable, which can happen when the fiber undergoes a vibration or strain. When attached to an opto-electrical connection, the fiber optic sensing can be used as a hyper-sensitive measurement device for electronic systems.

NASA, among other R&D agencies, began developing Fiber Optic Sensing Systems (FOSS) technologies over 5 years ago. Innovators at NASA’s Armstrong Flight Research Center began using FOSS to monitor the safety of aircraft structures in flight, but quickly found other uses for the technology in civil structures, transportation, oil and gas, medical, and many more spaces.

Germany’s Fraunhofer, one of Europe’s largest application-oriented research organizations, has been exploring the use of a related technology, namely, fiber optical 3D Shape Sensing. One application they have been studying is the real-time shape and position sensing of the fiber anywhere along the length of the optical fiber. Such sensors provide highly accurate measurements as the fibers twist and bend at every point along the sensor.

A few years back, Fraunhofer showed the value of using fiber optic sensing to accurately control the movements of a robot. The video below provides a convincing demonstration of this technology.