The invention discloses a cold atom
interferometry principle-based
inertia measuring device. The cold atom
interferometry principle-based
inertia measuring device comprises three
inertia measuring units, a
Raman laser, and a light dividing device with adjustable splitting ratio; each inertia measuring unit comprises a single-mode narrow linewidth
laser, an interferometic cavity, a
optical fiber beam splitter, four acoustic optical modulators (AOM), and one electrooptical modulator (EOM); the interferometic cavities are filled with
rubidium atomic vapor;
Raman laser light send by the
Raman laser can be divided into three beams of Raman
laser light via the light dividing device with adjustable splitting ratio, and the three beams of Raman
laser light are send to the three inertia measuring units; wherein the incidence directions of the three beams of Raman
laser light are orthogonal to each other. According to the cold atom
interferometry principle-based inertia measuring device, a reasonable structure scheme is adopted; three atom interferometers are arranged in a
pyramid mode, so that sensitive acceleration directions of the atom interferometers are orthogonal to each other, and sensitive
angular velocity directions are orthogonal to each other. One set of laser
system is shared by the three atom interferometers, so that synchronization of atom interference process is realized, and the
atom interferometer-based inertia measuring units are sensitive to inertial parameters with
six degrees of freedom simultaneously.