INERTIAL MEASURING INSTRUMENT Russian patent published in 2007 - IPC G01C19/72 

FIELD: instruments of orientation and navigation of movable objects in the form of flight vehicles, ships etc. and can be used in the systems of orientation and navigation of the mentioned movable objects as a sensing element producing an information about two components of the vector of the absolute angular velocity and two components of the vector of the phantom acceleration of movable objects in its two mutually perpendicular axes.

SUBSTANCE: the instrument has a gyroscope and an accelerometer installed on a hollow shaft that has ball bearing supports, rotor of a synchronous motor, raster of an optical position sensor installed on a hollow shaft, stator of a synchronous motor, radiator and a light detector of the optical position sensor installed on the instrument body, as well as a platform rigidly coupled to the hollow shaft, four coils and circular sliding contacts. Coupled to the gyroscope, accelerometer and hollow shaft are the circuits of light fibers insulated from one another, serving as components of the March-Zehnder interferometers and placed inside the coils. The outputs of the light detectors of the interferometers are connected to inputs of the units including an amplifier and a filter, and the outputs of these units are connected to the first inputs of the phase demodulators, respectively, the second input of the first phase demodulator is connected to the output of the optical position sensor with a zero initial phase shift, the second input of the second phase demodulator is connected to the output of the optical position sensor with an initial phase shift equal to 90 deg, the outputs of the four phase demodulators are connected to the inputs of the four output units having an amplifier and a filter each, whose outputs serve as the outputs of the inertial measuring instrument.

EFFECT: enhanced accuracy of determination of the measured parameters and simplified construction.

2 cl, 9 dwg