How are sensing fibers arranged within precision robotic arms with diameters of only a few millimeters?
For precision robotic arms with diameters of only a few millimeters, the arrangement of sensing fibers typically involves integrating multiple Fiber Bragg Grating (FBG) sensing arrays within a compact base material. For example, our OFSCN® Fiber Bragg Grating Shape Sensor, which is highly customizable, uses a default structure of three FBG strings arranged longitudinally at 120-degree intervals around a sensor substrate. This design allows for multi-point sensing and shape reconstruction within a small form factor, with default diameters ranging from 1.5mm to 6mm.
To provide a more precise solution, could you specify the total length of the section within the robotic arm that requires sensing, and the approximate number of measurement points needed along that length?