This invention relates to the field of sensor technology and discloses a six-dimensional
force sensor based on
fiber Bragg gratings (FBGs) and its fabrication method. The six-dimensional
force sensor of this invention includes a central body and an outer ring body, which are connected to the central body by multiple connecting beams. Each connecting beam has a through-hole. An
optical fiber is wound around an elastic body, and the core of the
optical fiber is etched with multiple
fiber Bragg gratings (FBGs). Each FBG reflects a different Bragg
wavelength, and the operating wavelengths of each FBG do not overlap. The FBGs are suspended at the through-holes of the connecting beams, with at least one FBG located at each through-hole. In this six-dimensional
force sensor, the FBGs are placed in the high-strain-sensitive region of the elastic body. When an external load is applied to the elastic body, the FBGs on the elastic body generate a
strain response, improving the sensor's ability to detect minute load changes. Furthermore, the overall structure is compact, easy to manufacture and assemble, and highly adaptable.