CONTACTLESS RADIO WAVE DEVICE FOR MEASUREMENT OF ROTATION FREQUENCY Russian patent published in 2015 - IPC G01P3/48 

FIELD: measurement equipment.

SUBSTANCE: contactless radio wave device of rotation frequency measurement, comprising a generator of electromagnetic waves of fixed frequency, a directed splitter, a circulator, a transceiving antenna for emission of electromagnet waves towards a rotary object along the normal line to its axis of rotation, connected to the circulator via the main wave guide of the directed splitter with the generator, a mixer of emitted and received electromagnetic waves, to the first and second inlets of which accordingly the generator is connected via an auxiliary wave guide of the directed splitter and the antenna via the circulator. Besides, the device comprises the second generator of electromagnet waves with the same fixed frequency, the second directed splitter, the second circulator, the second transceiving antenna for emission of electromagnetic waves towards a rotary object along the normal line to the axis of rotation at the same distance from the axis of rotation and in the same plane, but at the angle α towards emission by the first antenna, connected with the circulator via the main wave guide of the directed splitter with the second generator, the second mixer of emitted and received electromagnet waves, to the first and second inlets of which accordingly the second generator is connected via the auxiliary wave guide of the second directed splitter and the second antenna via the second circulator, a computing unit, inlets of which are connected to outlets of the first and second mixers.

EFFECT: increased accuracy of measurement.

2 dwg