2 results about "Fibre optic gyroscope" patented technology

The application discloses a kind of time division multiplexing three-axis wide spectrum light source resonant type fiber-optic gyroscope detection systems and methods, belong to gyroscope optical system design field.System is constituted by optical system and signal detection system, and optical system includes a wide spectrum light source, a push-pull Y waveguide, a circulator, three mutually orthogonal transmission type fiber ring resonant cavity, two sections of delay optical fiber and a photoelectric detector;Signal detection system includes modulation and demodulation module, time division decoupling module and low-pass filter module.Three transmission type fiber ring resonant cavities are sequentially connected, and the time of optical signal reaching three fiber ring resonant cavities is different by being set delay optical fiber between adjacent two transmission type fiber ring resonant cavities.The application ingeniously designs three fiber ring resonant cavities to form three-axis integrated structure.In this way, the time difference of three-axis signals is utilized, and multiplexing in time domain can be realized without adding additional devices.

The utility model relates to the field of laser deflection instrument discloses a new laser deflection instrument, including laser dynamic deflection car main part, a plurality of working wheels are installed to the laser dynamic deflection car main part outside, the laser dynamic deflection car main part outside is installed with the optical fiber gyro main part, the laser dynamic deflection car main part outside is provided with cleaning assembly, the laser dynamic deflection car main part top is provided with detection assembly, the cleaning assembly includes the protective shell, the protective shell outside fixedly connected in the laser dynamic deflection car main part top, the protective shell inner wall is fixedly connected with motor. In the utility model, the rotating shaft is driven by motor to drive the rotating disc to rotate, makes L type rod reciprocating sliding in the limiting block through the connecting piece, axle, and the spring in the shell keeps the brush plate in contact with the road surface, realizes the sustained cleaning to the measured ground, avoids the sundries interference laser light path, ensures the accuracy of deflection detection data and the continuous work ability of equipment.